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WO2020052588A1 - Pointe de contact de soudage résistante à haute température et à longue durée de vie, son procédé de fabrication et son procédé d'utilisation - Google Patents

Pointe de contact de soudage résistante à haute température et à longue durée de vie, son procédé de fabrication et son procédé d'utilisation Download PDF

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Publication number
WO2020052588A1
WO2020052588A1 PCT/CN2019/105365 CN2019105365W WO2020052588A1 WO 2020052588 A1 WO2020052588 A1 WO 2020052588A1 CN 2019105365 W CN2019105365 W CN 2019105365W WO 2020052588 A1 WO2020052588 A1 WO 2020052588A1
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Prior art keywords
conductive
contact tip
processing
welding wire
hole
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PCT/CN2019/105365
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English (en)
Chinese (zh)
Inventor
何强
何珍
汪年成
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Individual
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/24—Features related to electrodes
    • B23K9/26—Accessories for electrodes, e.g. ignition tips
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass

Definitions

  • the technical field to which the present invention relates is a welding contact tip and a manufacturing method thereof, which are characterized in that the front end of the contact tip has a gap, and the gap divides the contact tip into two conductive blocks, the conductive block restricts the welding wire and conducts the welding wire. , And for the wire to wear.
  • the gap is obtained by cutting, interference connection of conductive combination blocks, and forging.
  • the welding contact tip of the invention not only has a long service life, but also has excellent conductivity, and can be used continuously in an extremely high temperature environment with large current.
  • the invention also relates to a method for using the conductive nozzle.
  • the conductive tip is a key component of the gas-shielded arc welding of molten electrodes, and its performance is mainly reflected in two aspects, one is conductive performance.
  • the wire feeding mechanism continuously feeds the filler metal (welding wire) to the molten pool through the conductive nozzle, and the arc melts the welding wire and the base material to achieve welding.
  • the welding wire constantly rubs against the contact tip. The longer the welding time, the more serious the contact tip friction will be.
  • the inner hole of the contact tip will continue to increase, the inner hole becomes larger, and the conductive performance will be worse. When it reaches a certain level, the contact tip will be replaced. In other words, from the moment a new contact tip is used, the conductivity of the contact tip will become worse and worse, and the welding quality will worsen with it.
  • the structure of the contact tip of the invention has not changed fundamentally, the spiral body still has internal holes, and the welding wire inevitably rubs against the internal holes.
  • the spiral structure reduces the rigidity of the contact tip, and the contact tip will swing with the arc of the welding wire, which easily causes the defect of welding deviation.
  • the conductive nozzle disclosed in this patent is composed of 4 independent parts-see Figure 1 (a), Figure 1 (b), and Figure 1 (c) in the patent specification and the accompanying drawings of the patent.
  • this contact has the following disadvantages: 1. There is a spring in the middle of the contact, which increases the overall length. At present, the shortest contact on the market is only about 20 mm in length. 2.
  • the contact nozzle shell is added to make the contact nozzle thicker, which is not conducive to welding in a narrow space. 3.
  • the potential energy of the spring will cause the frustum to shrink without the welding wire inserted, resulting in the center hole of the welding wire clamp becoming smaller and the welding wire unable to be inserted. 4.
  • the welding wire clamp shrinks the welding wire clamp by the potential energy stored by the spring, but there will be friction between the welding wire clamp and the contact tip housing, and the existence of the friction force will reduce the sensitivity of the welding wire clamp shrinkage. 5.
  • the conductive nozzle holder needs to transmit the electric energy from the welding machine to the welding wire clip, but the structure of the invention determines that the conductive nozzle holder, the conductive nozzle housing, the spring, and the welding wire clip can only be connected by contact, and the contact force is also It should not be too large, which increases the contact resistance and weakens the power transmission capacity. 6.
  • the spring can only be made of copper alloy, but the contact tip is used in high temperature environment. The copper alloy spring will lose its elasticity in high temperature environment. If the spring is made of high temperature resistant metal, the electrical energy The conduction effect will inevitably be affected.
  • the contact tip is composed of a contact tip core, a porcelain cap and a tailstock, which increases the length and outer diameter of the contact tip, which is not conducive to welding in a narrow space.
  • the middle of the conductive inner core is a "Y" shape, the structure is complicated, and the processing efficiency is low.
  • the connecting piece In order to obtain good elasticity of the clamping block, the connecting piece is not easy to be too thick (too thick), but the contact tip works in a high temperature environment, the temperature of the connecting piece will be very high, and the elasticity will be reduced to disappear.
  • Welding is the process of melting the welding wire with a melting point of 1350 ° C and the base metal in an instant.
  • the temperature of the arc is between 6000-12000 ° C
  • the temperature of the molten droplets is about 2000 ° C
  • the temperature of the molten pool is about 1750 ° C.
  • the distance between the contact tip and the arc is only 10-15 mm. In this case, the temperature of the contact tip will quickly rise to 600-800 ° C.
  • the ability of the contact tip to withstand the test in such a high temperature environment is the key to the success of the invention.
  • the connecting piece in "Long-Term Conductive Nozzle" will soften in high temperature environment, the welding wire will open the clamping block, the welding wire will shake more, and the conductive performance will not be improved but will be greatly reduced.
  • the present invention provides a simple structure, multiple manufacturing methods, easy production and processing, high production efficiency, low cost, and high temperature. Welding contact tips that are not deformed and not softened in the environment, and a method for manufacturing the contact tips.
  • the invention does not deliberately pursue the diversity of product functions, but only seeks a simpler structure that is more conducive to processing and manufacturing design, to achieve high temperature resistance, improve product production efficiency, reduce product production costs, achieve large-scale production, and enable products to be quickly promoted. And applications, it is easier to be accepted by the general public, and actually serves the purpose of welding production.
  • the technical solution provided by the present invention not only has the advantages of high temperature resistance, simple structure, easy processing, high production efficiency, and low production cost, but also provides a technical solution of a contact tip with a longer service life than the above-mentioned "long-acting contact tip" Not only has a longer service life, but also has a simple structure, easy processing, low production cost, and can also be used in high temperature environments.
  • the invention also provides a plurality of manufacturing methods of the above-mentioned conductive nozzles, and one or more of them can be selected according to different situations and needs during production, so that the production and processing of the products become more flexible and efficient.
  • the technical solution adopted by the present invention to solve its technical problems is: in order to make the structure of the contact tip have sufficient stability in a high-temperature environment and not to soften during use, the strength of the contact tip must be increased.
  • a straight notch with a length of about 2-30 mm and a height of about 0.01-6 mm is opened in the front section of the existing contact tip.
  • the straight notch needs to pass through the center of the inner hole of the contact tip (that is, the wire through hole).
  • the thickness and width of the conductive block should be maximized.
  • the conductive block becomes thicker and larger, and the strength of the conductive block is higher.
  • the height of the straight notch is 0.1-4 times the diameter of the welding wire.
  • the conductive block can be pressed inward to make the welding wire fully contact the conductive tip. After the conductive tip penetrates the welding wire, the conductive block and the welding wire can be fully contacted, and electrical energy can be transmitted from the conductive tip to the welding wire. As the welding progresses, the conductive block is worn and worn by the welding wire, and the welding wire shakes. At this time, the upper and lower conductive blocks are pressed inward to eliminate the gap between the welding wire and the conductive block, so that the welding wire no longer shakes, and the conductive tip can continue to use. Repeat this process many times until the upper and lower conductive blocks are completely close (the gap of the gap is zero). Compared with ordinary contact tips, this solution provides more material for welding wire wear, so the service life is high. More critically, the solution has a stable structure, a higher strength of the conductive block can withstand the test of high temperature without deformation, and can be used for a long time in a high temperature environment.
  • the processing method is: the front end of the contact tip is processed into a regular cylinder, the cylinder is about 2-30 mm in length, and the diameter of the cylinder is preferably 1.5-5 times the diameter of the welding wire. After the cylinder is processed, two symmetrical notches are opened at the rear end of the cylinder, so that the material thickness of the remaining part between the two notches is 2-4 times the diameter of the welding wire, and the gap is still straight. .
  • the height of the gap is 1-3 times the diameter of the welding wire.
  • the thickness of the material at the notch of the conductive block must be 0.3-2 mm.
  • the two conductive blocks are pressed together. If the work of pressing the two conductive blocks is difficult due to the hard material, the height of the gap can be appropriately increased.
  • the thickness of the material in the notch is controlled to 0.3-2 mm, so that the conductive block has a proper elasticity. Because the conductive block requires good elasticity (when the two conductive blocks are ground by a wire with a circular hole of the same diameter as the wire, the conductive block can also fit the wire well), and the resistance is also required (the contact tip has just begun to use When the conductive block is not worn, the welding wire passes through the conductive block.
  • the resistance of the conductive block to the welding wire is the largest, but this resistance requirement does not affect the easy passage of the welding wire from the conductive block.
  • the depth of the gap can control the thickness of the material at the gap, so it can Adjust the resistance of the conductive block through the gap. Since the conductive block needs to have a proper elastic force, it is called an elastic conductive block. In order to make the elastic conductive block have a proper elasticity, an additional gap needs to be processed at the rear end of the elastic conductive block, and an additional processing step is required. In order to further simplify the structure of the contact tip and improve the processing efficiency, the rear end of the cylinder can be changed to a concave ring.
  • the concave ring is also cylindrical and has a smaller diameter than the cylinder used to process the elastic conductive block.
  • the structure of the concave ring is similar to the structure of the cylindrical body, which can be processed together when processing the cylindrical body. This leaves the process of machining the notch.
  • the diameter of the concave ring is smaller than that of the cylinder, and it also plays the same role as machining the notch on the cylinder. , But the structure is simpler. Compared with the conductive inner core, the high-temperature-resistant and long-life conductive nozzle has a simpler structure in terms of the composition structure, and the connection piece is eliminated.
  • the gap can be cut with a cutting sheet.
  • the cutting sheet is a commonly used metal processing tool, which is easy to obtain, and the cost of the processing tool (equipment) is also low.
  • the internal structure of the conductive inner core is "approximately a 'Y'-shaped groove" and can only be processed by wire cutting. Wire cutting is not only inefficient, the cutting fluid during cutting will also oxidize the material, and it needs to be cleaned. , Which further reduces efficiency and costs more.
  • the above-mentioned high-temperature-resistant and long-life conductive nozzle has no connecting piece, and the conductive block has a flat structure inside, instead of a "Y" structure with a conductive inner core or a hollow structure with a large inside and a small outside.
  • the internal structure is simpler than the conductive inner core, easy to process and produce, and has low cost and high efficiency.
  • the service life has not improved.
  • the more than the amount of wear provided by the contact tip to the welding wire can only be as thick as the diameter of the welding wire. This is still the ideal state of assumption that the welding wire only wears to the side of the elastic conductive block. Generally, there are many contact tips. The amount of wear provided to the wire is only about one-half of the wire diameter.
  • the method is to process the front end of the contact tip into a cylinder, the diameter of the cylinder is 3.2-5 times the diameter of the welding wire, and the length of the cylinder is about 4 -20 mm. Then cut off the material on both sides of the cylinder, first cut straight 2-10 mm from the back, and then cut it obliquely outside the conductive tip. The cut off parts on both sides are symmetrical structures. Only the material of the middle part is retained at the front end of the contact tip, and the thickness of the material of the middle part is slightly smaller than the diameter of the welding wire.
  • the width of the conductive block is slightly narrower than that of the welding wire, no matter how the conductive block is worn, the upper and lower conductive blocks will never conflict with each other, so more material can be provided for its wear.
  • This type of conductive block that can provide more wear is called a thickened conductive block.
  • a thickened conductive block Referring to the above-mentioned solution of high-temperature-resistant and long-life conductive nozzles, and combined with the actual production, different solutions such as ordinary conductive blocks and elastic conductive blocks can be used respectively.
  • the front end of the high temperature resistant long-life contact tip is an elongated cylinder.
  • the outer diameter of the cylinder is 2-4 times the diameter of the welding wire and the length is 5-20 mm.
  • the diameter of the via hole is slightly larger than that of the ordinary conductive tip, which is 1.1-3 times the diameter of the welding wire.
  • the head of the cylinder is a conductive head, and the center of the conductive head is a conductive hole.
  • the conductive hole is smaller than the large via hole and the diameter is equivalent to the diameter of the welding wire.
  • the conductive hole and the large via hole are on the same axis.
  • the welding wire exits from the conductive hole through a large via.
  • the conductive head can be squeezed inward with external force to make the conductive hole diameter smaller, and the conductive tip can continue to be used, and this cycle is used.
  • all materials of the entire cross-section of the cylinder can be used for welding wire wear.
  • the contact tip can be used continuously. Considering that if the cylinder wears too much and the welding wire extends too long, replace the new contact tip when the cylinder wears 3-10 mm.
  • the large via hole diameter of the high temperature resistant long-life conductive tip is larger than that of the welding wire.
  • the conductive hole diameter of the conductive head is equivalent to that of the welding wire.
  • the welding wire penetrates the conductive hole through the large via hole.
  • the conductive hole forms a constraint on the welding wire and conducts it.
  • the welding wire will only wear the hole wall at the conductive hole. Since the welding wire will not contact the wall of the large via hole within a certain length of the rear of the conductive hole, the part will not wear out in advance, and the cylinder can be normal. use.
  • This solution not only makes all the material of the entire cylinder cross-section available for wire wear, but also the length of the cylinder that can be worn by the contact tip is 3-10 mm, so the service life of the high-temperature-resistant and long-life contact tip is further improved.
  • the high-temperature-resistant and long-life conductive tip welding wire vias have a larger diameter than conventional conductive tips, and the larger the diameter of the wire vias, the easier it is to process.
  • Adopting the technical solution of the conductive block although the service life and conductive performance of the conductive tip are improved, there are gaps between the conductive blocks, and the conductive tip is close to the molten pool. Splashes will inevitably splash into the gap during welding, resulting in cleaning. Trouble of splash.
  • This solution is a fully enclosed structure without gaps, eliminating the need to clean up and splash.
  • the main material of the contact tip is copper, which has a soft texture and a cylindrical wall thickness of only 1-3 mm. It is also very easy to conduct secondary processing on the conductive hole after it is worn.
  • the beneficial effects of the present invention are: in terms of the composition structure, the connection piece is eliminated from the high-temperature-resistant and long-life conductive nozzle, the composition structure is simpler, and the production is more efficient and rapid.
  • the high-temperature-resistant and long-life contact tip does not have a complicated hollow structure or an "approximately 'Y'-shaped groove". Instead, it is a straight gap that can be easily processed using a cutting blade. .
  • the conductive block becomes thicker and larger, and the strength of the conductive block is higher.
  • the structure of the contact tip will be more stable.
  • the conductive block can also withstand the interference from the welding wire in a high-temperature environment.
  • the conductive block will not be opened by the welding wire because of this.
  • the welding wire and the conductive block always maintain good contact, which improves the conductive performance. Maintains good electrical conductivity throughout the soldering process.
  • the conductive block is not deformed, and it always maintains a good fit with the welding wire, and the service life of the conductive tip is longer.
  • the width of the conductive block is designed to be slightly smaller than the diameter of the welding wire. No matter how the conductive block is worn, the conductive blocks will not conflict with each other.
  • the conductive block can provide more material for the welding wire to wear, and the service life of the conductive tip is further improved. improve. This solution is especially suitable for use on large-diameter wire contact tips.
  • the conductive hole is repaired after secondary processing, so that all the material of the entire cross section of the cylinder at the front end of the conductive nozzle can be used for wire grinding.
  • the large via hole is large and the conductive hole is small.
  • the welding wire passes out of the conductive hole through the large via hole.
  • the welding wire only wears the conductive hole.
  • the welding wire does not contact the hole wall of the large via hole within a certain length of the rear of the conductive hole.
  • the large vias of the part will not be worn out in advance, so the contact tip can be reused many times, and the service life is further increased.
  • the high-temperature-resistant and long-life conductive tip welding wire vias are larger than the welding wire vias of ordinary conductive tips, making processing easier and easier.
  • the contact tip is a fully-closed structure, and there are no gaps, and no splashing into the gaps occurs, which saves the trouble of cleaning and splashing.
  • the problem that the via hole of the conductive tip welding wire is easily blocked is also solved because the inner diameter of the via hole becomes larger.
  • FIG. 1 is a structural diagram of a high-temperature-resistant and long-life conductive tip.
  • FIG. 2 is a structural diagram of a high-temperature-resistant and long-life conductive tip with an elastic conductive block.
  • FIG. 3 is a structural diagram of a high-temperature-resistant long-life contact tip with a thickened conductive block.
  • FIG. 4 is a cross-sectional view of a high-temperature-resistant long-life conductive tip having a conductive hole in a head.
  • Figure 5 is a flow chart of the processing process of high temperature resistant and long life contact tip
  • FIG. 6 is a flowchart of the processing process of high temperature resistant long life contact tip
  • FIG. 7 is a processing diagram of a high-temperature-resistant and long-life conductive nozzle—a concave ring is provided at the rear end of a cylinder used for processing a conductive block.
  • FIG. 8 is a processing diagram of a high-temperature-resistant and long-life conductive nozzle—a straight gap is provided in the middle of a cylinder for processing a conductive block.
  • FIG. 9 is a cross-sectional view of a finished product of a high-temperature-resistant long-life contact tip with a concave ring on an elastic conductive block.
  • Figure 10 is a flowchart of the process of high temperature resistant long life contact nozzle
  • Figure 11 is a flowchart of the process of high temperature resistant long life contact nozzle
  • FIG. 12 is a structural diagram of a conductive combination block.
  • FIG. 13 is a structural diagram of a rectangular parallelepiped blank.
  • FIG. 14 is a processing schematic diagram of a high-temperature-resistant and long-life conductive nozzle in which two conductive combination blocks are used for interference connection using a connecting post.
  • FIG. 15 is a structural diagram of a polygonal high temperature resistant long-life conductive tip.
  • FIG. 16 is a structural diagram of a conductive combination recess.
  • FIG. 17 is a structural diagram of a conductive composite bump.
  • FIG. 18 is a flowchart of a high-temperature-resistant and long-life processing nozzle.
  • FIG. 19 is a structural diagram of a high-temperature-resistant and long-life conductive nozzle with a dual-pillar structure.
  • FIG. 20 is a structural diagram of a high-temperature-resistant and long-life conductive tip with a cylindrical structure.
  • FIG. 21 is a structural diagram of a high-temperature-resistant and long-life conductive tip with a straight notch.
  • FIG. 22 is a structural diagram of a notch on a high-temperature-resistant long-life conductive tip with a conical cylinder structure.
  • FIG. 23 is a structural diagram of a high-temperature-resistant and long-life conductive tip without a notch.
  • FIG. 24 is a structural diagram of a high-temperature-resistant long-life contact tip having a plurality of gaps.
  • FIG. 25 is a structural view of a high-temperature-resistant and long-life conductive tip with a conical conductive block.
  • FIG. 26 is a structural diagram of an extended high-temperature-resistant and long-life contact tip.
  • FIG. 27 is a structural diagram of a high-temperature-resistant long-life contact tip processed by a knurling process on an outer circle.
  • FIG. 28 is a structural diagram of a high-temperature-resistant and long-life welding contact using an internal thread connection.
  • FIG. 29 is a structural diagram of a high-temperature-resistant and long-life welding contact tip with a taper at the tail connection.
  • FIG. 30 is a structural diagram of a high-temperature-resistant long-life welding contact tip connected by a T-junction.
  • FIG. 31 is a softening temperature curve of copper.
  • FIG. 32 is a sample diagram of a high-current welding conductive block being stretched by a welding wire when it is softened by high temperature.
  • FIG. 33 is a real sample drawing of a conductive block with a protective cover under high-current welding and softened by a welding wire at high temperature.
  • Embodiment 1 As shown in FIG. 1, a straight gap 1 with a length of about 2-30 mm in length and a height of about 0.01-6 mm is opened in the front section of a common conductive nozzle.
  • the gap 1 needs to be divided into two upper and lower conductive blocks 5 by the center of the inner hole of the conductive nozzle.
  • the best solution is, for example, using a conductive tip with a 1.2 mm wire, and the height of the gap 1 takes the diameter of the wire as 1.2 mm.
  • the welding wire shakes in the middle of the conductive block 5, press the conductive block 5 inward. So that the welding wire is in full contact with the conductive block 5.
  • This solution maximizes the thickness and width of the conductive block 5, the conductive block becomes thicker and larger, the strength of the conductive block is higher, and it has sufficient stability in a high temperature environment, and the conductive block 5 will not spread to make it conductive. Poor performance, but also maximize the life of the contact tip.
  • a cutting piece with a thickness slightly larger than the diameter of the inner hole of the contact tip is selected. The width of the gap 1 cut out in this way is larger than that of the inner hole. Even if there is a deviation during processing, the inner hole of the contact tip and the gap 1 will not be misaligned.
  • the upper and lower conductive blocks 5 are appropriately pressed inward, so that the distance between the two conductive blocks 5 is equal to the diameter of the welding wire, and the high-temperature-resistant and long-life conductive tip is processed.
  • the welding wire 2 is inserted into the inner hole of the contact tip and penetrated from the conductive block 5 at the front end.
  • the size of the gap 1 is equal to the diameter of the welding wire 2.
  • the conductive block 5 is retracted in time to keep the conductive block 5 and the welding wire 2 in full contact at all times. Then continue to use until the size of the gap 1 is zero, until the upper and lower electric blocks 5 are completely closed.
  • Embodiment 2 As shown in FIG. 2.
  • the front end of the contact tip is processed into a cylinder, the cylinder is about 2-30 mm in length, and the diameter of the cylinder is 2.5-5 times the diameter of the welding wire 2.
  • Two symmetrical notches 7 are formed at the rear end of the cylinder, so that the material thickness of the remaining part between the two notches 7 is 2-4 times the diameter of the welding wire 2.
  • the length of the notch 1 is equivalent to the length of the cylinder, the height is 1-3 times the diameter of the welding wire 2, and the thickness of the elastic conductive block 6 at the notch 7 is 0.3-2 mm. Finally, the two symmetrical elastic conductive blocks 6 are pressed together. If the pressing is still difficult, the height of the gap 1 can be appropriately increased.
  • the material thickness of the notch 7 is controlled to 0.3-2 mm, so that the elastic conductive block 6 has a proper elastic force. Controlling the depth of the notch 7 can control the thickness of the material at the notch 7 to adjust the elasticity of the elastic conductive block 6.
  • Processing the front end of the contact tip into a cylinder with a smaller diameter can narrow the material at the notch 7, which can increase its thickness and reduce the processing difficulty of the elastic conductive block 6.
  • the rear end of the cylinder is changed to a structure of a concave ring 23, which is coaxial with the cylinder and has a smaller diameter than the cylinder. If the cutting or spinning method is used for processing, the concave ring 7 can be completed synchronously when processing the cylinder, which saves time for processing the gap 7 and has higher efficiency.
  • the ordinary conductive block 5 can also be processed with the notch 7 or the concave ring 23.
  • Embodiment 3 As shown in FIG. 3, in order to further increase the service life of the contact tip, more material must be provided for the contact tip to wear. Increase the diameter of the cylinder at the front end of the contact tip to 3.2-5 times the diameter of the welding wire 2 and the cylinder length is about 4-15 mm. Cut off the material on both sides of the cylinder, cut straight 2-10 millimeters from front to back, and then cut obliquely outside the conductive tip. The cut off parts on both sides are symmetrical structures. The remaining part of the material in the middle forms the thick conductive block 8, and the width of the thick conductive block 8 is slightly smaller than the diameter of the welding wire 2. There is a positioning arc surface 9 on the inner side of the thick conductive block 8.
  • the positioning arc surface 9 restrains the welding wire 2 to ensure the accuracy of wire drawing.
  • the heads of the upper and lower thickened conductive blocks 8 tilt slightly inward.
  • the thickness of the thick conductive block 8 is narrower than that of the welding wire 2. No matter how worn, the upper and lower conductive blocks will never conflict with each other.
  • the thickness is 4.4 mm. The thickness of 4.4 millimeters can be all provided to the contact tip for abrasion.
  • the conductive block 5 and the elastic conductive block 6 thus processed also form a positioning arc surface 9.
  • the positioning arc surface 9 may be curved or straight.
  • the process of thickening the conductive block 8 can be obtained by cutting. Use a cutting sheet to cut off the material on both sides of the cylinder of the conductive tip. First, cut 2-10 mm straight from the edge of the hole in the cylinder (welding wire via), and then Cut diagonally to the outside of the contact tip, and keep the sides of the cut off the same.
  • the thickened conductive block 8 can also be processed by milling. Mill the left and right two 2-10 mm straight faces on the head of the cylinder, and then mill the inclined faces.
  • Embodiment 4 As shown in FIG. 4, the front section of the high-temperature-resistant and long-life contact tip is an elongated thin-walled cylindrical structure.
  • the outer diameter of the cylinder is 1.2-3 times the diameter of the welding wire 2, and the length is 5-20 mm. 0.1-2 mm thick.
  • the center of the high-temperature-resistant and long-life conductive tip is a large via hole 10, the diameter of the large via hole 10 is 1.05-2 times the diameter of the welding wire 2, and the large via hole 10 is a channel of the welding wire 2.
  • the head of the conductive nozzle is a conductive head 11 with a length of 0.1-8 mm.
  • the center of the conductive head 11 is a conductive hole 13, and the conductive hole 12 is on the same axis as the large via hole 10.
  • the diameter of the conductive hole 12 is 1.01 to 1.2 times the diameter of the welding wire 2 to facilitate conducting electricity for the welding wire 2.
  • the conductive nozzle can continue to be used, so the cycle-this solution intentionally reduces the outer diameter of the front section of the conductive nozzle, The wall thickness of this part is reduced, the purpose is to facilitate the secondary processing to repair the conductive hole 12 after the conductive hole 12 is worn. All materials of the entire cross section of the cylinder can be used for the welding wire 2 to wear.
  • the contact tip can be used continuously. Considering that if the cylinder wears too much, the welding wire 2 will extend too long, and when the cylinder wears 3-10 mm, replace it with a new contact tip.
  • the welding wire 2 protrudes from the conductive hole 12 through the large via hole 10, and the conductive hole 12 forms a constraint on the welding wire 2 and conducts it.
  • the welding wire 2 only wears the conductive hole 12, and the welding wire 2 does not contact the hole wall of the large via hole 10 within a certain length of the rear portion of the conductive hole 12, so the The cylindrical part of the part will not be worn out in advance, and the contact tip can be used normally. All materials of the entire cylinder section can be worn by the welding wire 2 and have a length of 3-10 mm, so the service life is further extended.
  • the hole diameter of the large via hole 10 is larger than that of the welding wire via hole 24 of the conventional contact tip, which makes processing simpler and easier.
  • the hole diameter of the large via hole 10 and the conductive hole 12 in the thin-walled structure of the front part of the contact tip can be consistent.
  • the front end of the contact tip is repaired to reduce the aperture there. Is a conductive hole 12.
  • Embodiment 5 Take a piece of copper or copper alloy and a cylinder-shaped blank 13.
  • the diameter of the blank 13 is required to be larger than the maximum cross-section of the contact tip.
  • a large hole is drilled around the center of the blank, and the hole diameter is one-third to one-half of the outer diameter of the cylinder. Due to the larger diameter of the cylinder, the diameter of the hole also becomes larger. Whether it is drilling or drilling, the diameter of the drill or punch used also increases. In this way, a large-diameter drill or punch can be used for processing.
  • This has the advantage that the tool for processing the hole is high in strength and is not easy to be damaged and broken.
  • the hole can be applied with greater force to increase the drilling speed.
  • the processing tool can also be used.
  • the diameter of the cylinder is gradually reduced by rolling, until it is suitable for the size of the conductive tip.
  • the rolling compression reduces the outer diameter of the cylinder and also reduces the large hole.
  • a metal core rod with a diameter equal to that of the welding wire 2 can be inserted.
  • the strength of the metal core rod is higher than that of the blank. In this way, the quality requirements such as the diameter and roundness of the central hole of the cylinder can be guaranteed.
  • the cylinder can also be processed by spinning, drawing, etc. The processing idea is basically the same as the rolling method.
  • the billet can be heated before processing.
  • the reduced cylinder is cut into the length of a single contact tip, and the shape of the contact tip is processed by cutting, spinning, forging, and extrusion.
  • Use the cutting piece to process the gap 1 at the front end of the contact tip.
  • the height of the gap 1 is equivalent to the diameter of the welding wire, so that it is a conductive block 5 that is symmetrical up and down. Adjust the gap between the two conductive blocks 5 to be consistent with the diameter of the welding wire. To ensure full contact with the welding wire.
  • the connection thread 3 is cut and the tightening plane 4 is milled. The process flow is shown in Figure 5.
  • the head of the contact tip is processed into a small cylinder, and the notch 7 is processed by milling, drilling or cutting, and then the gap 1 is processed by the milling or cutting, and finally the notch 7 is processed.
  • the material at the same time is pressed in at the same time, so that the part of the material is permanently deformed, and the upper and lower elastic conductive blocks 6 are brought close together.
  • the process flow is shown in Figure 6.
  • the part may be heated and then added.
  • the elastic conductive block 6 can be obtained by thinning the material at the rear end.
  • the elastic conductive block 6 may not have the notch 7. Since the front end of the contact tip needs to be processed with a gap, the welding wire via hole 24 may not be processed at this part.
  • a concave ring 23 is simultaneously processed at the rear end of the small cylinder.
  • the structure of the concave ring 23 is shown in FIG. 7.
  • the gap 1 is cut.
  • the heel of the gap 1 is as far as possible in the middle or the middle of the recessed ring 23, as shown in FIG. Crushing processing.
  • the finished high-temperature-resistant and long-life contact tip is shown in Figure 9.
  • the rear end of the elastic conductive block 6 has a concave ring, which replaces the function of the notch 7 and can be processed synchronously with a small cylinder, saving time and effort.
  • the above solution uses a cutting blade to process the missing seam 1.
  • the method is simple, the cutting will cause a large amount of dust, which will adversely affect the operator's health and the environment. Therefore, the gap 1 can be changed from the cutting sheet processing to the forging processing.
  • a forging die is used to press a high gap at one end of the blank along the axial direction of the blank, and the high gap passes through the center of the blank and penetrates. The length of the high gap is shorter than the length of the gap 1 and the height is greater than the height of the gap 1. Drill a large hole in the center of the high gap.
  • This large hole coincides with the center of the blank.
  • Rolling, spinning, drawing or extrusion are used to reduce the outer diameter of the billet and the large hole to the size of the high-temperature-resistant long-life outer diameter of the contact tip and the diameter of the welding wire via 24.
  • the processed gaps The length will also increase and the height will decrease.
  • a core rod with the same diameter as the high temperature resistant long-life conductive tip welding wire via hole and a core block of the same size as the gap 1 can be placed in the large hole before processing. Then cut or forge the shape, while pressing the conductive block 5 inward. Finally, the connecting thread 3 is cut and the tightening plane 4 is milled.
  • the process flow is shown in Figure 10.
  • the processing of the elastic conductive block 6 can also be performed with reference to this method.
  • the gap 1 is made higher, it can also be processed directly by forging. It is not necessary to process the gap 1 first and then process the gap 1 to save processing costs and shorten processing time.
  • Embodiment 6 A model is made.
  • the front end of the model is a conductive block 5, the middle is a blind hole 28, and the rear end is a rear portion 29.
  • the specific shape of the model is shown in FIG.
  • the concave and convex dies of the forging die are processed according to the structure of the model. Calculate the volume of the mold cavity, according to this volume and the boundary size of the product to prepare the blank cuboid blank 30 (see Figure 13).
  • the cuboid blank 30 is put into a mold to be forged and formed. After the cuboid blank 30 is forged and formed, it becomes a conductive combination 27. If the conductive combination 27 cannot be completed in one process, multiple processes can be used.
  • the connecting post 31 is manufactured.
  • the outer diameter of the middle part of the connecting post 31 is slightly larger than the outer diameter of the blind hole 28, the outer diameters of the two ends are slightly smaller than the blind hole 28, and the length is slightly greater than twice the depth of the blind hole 28.
  • the finished mold is manufactured, and the upper and lower molds of the mold are manufactured by using the structure of the polygonal high temperature resistant long-life conductive tip 32 as a model.
  • connection post 31 into the blind hole 28 of the conductive combination 27, and take another conductive combination 27, align the blind hole 28 of the conductive combination 27 with the connection post 31,
  • the two conductive combination blocks 27 are connected together under the interference fit of the connecting post 31 and the blind hole 28 to form a polygonal high temperature resistant long-life conductive tip 32 (see FIG. 14).
  • the welding wire via hole 24 of the polygonal high-temperature-resistant long-life and durable conductive tip 32 see FIG. 15
  • other parts such as the connection thread 3 of the rear portion 29 are drilled.
  • a larger hole can be drilled first, and then the hole can be reduced by spinning, rolling, drawing or rolling.
  • the connecting post 31 can be eliminated, and the two semi-finished products can be directly connected by interference in an uneven manner.
  • a convex die and a concave die of a forging die are produced, and then the conductive combination concave block 33 is forged. If one process cannot be completed, it can be divided into multiple processes.
  • the conductive combination concave block 33 has a recess. ⁇ 34 ⁇ Projection 35.
  • the male and female dies of the forging die are produced. If one process cannot be completed, it can be divided into multiple processes.
  • the conductive composite bump 36 has a recessed hole 34 and a boss 35, and then Forging conductive combination bump 36.
  • the finished mold is made, and the upper and lower molds are made according to the structure of the finished product. Put the conductive combination recess 33 into the lower mold, and then place the conductive combination bump 36 on the conductive combination recess 33.
  • the recessed hole 34 of the conductive combination recess 33 is aligned with the projection 35 of the conductive combination bump 36.
  • the conductive combination The projection 35 of the concave block 33 is aligned with the concave hole 34 of the conductive combination bump 36, and the upper mold is pressed down to press the conductive combination recess 33 and the conductive combination bump 36 together to form an interference connection.
  • the size of the recessed hole 34 is slightly smaller than the size of the boss 35, and conversely, the size of the boss 35 is slightly larger than the size of the recessed hole 34.
  • the size of the upper end of the recessed hole 34 should be slightly larger than the lower end to facilitate the entry of the boss 35.
  • the size of the upper end of the boss 35 should be slightly smaller than the lower end to facilitate the entry of the recessed hole 34.
  • the contact tip is manufactured in the form of forging and interference connection, and the machining process is minimized by drilling, milling, cutting, etc., so that only a small amount of waste is generated during the processing, which saves material costs.
  • the contact tip is made into a polygon, which saves the work of processing and tightening the plane 4.
  • the conductive block is formed naturally, and no additional gap 1 processing is required, which improves production efficiency.
  • the recessed hole 34 and the projection 35 may penetrate the cross section of the conductive combination recess 33, and the recessed hole 34 and the projection 35 may also penetrate the cross section of the conductive combination bump 36. In this way, the conductive combination recess 33 and the conductive combination bump 36 can be interference-connected from the side (the direction perpendicular to FIG. 14).
  • the notch 7 and the concave ring 23 can be processed together.
  • a core rod with a diameter corresponding to the welding wire can be placed in the middle, and the core rod can be pulled out after being compressed, and the hollow portion becomes the welding wire via hole 24.
  • the blind hole 28, the recessed hole 34, and the boss 35 should avoid the processing position of the welding wire via hole 24.
  • a groove is pre-processed at the position of the welding wire via hole 24.
  • Embodiment 7 As shown in FIG. 18, the main contour of the contact tip is processed by cutting, spinning or rolling the blank 13, and the focus is on processing the rear part 29 and the front cylinder of the contact tip.
  • the rear part 29 of the contact tip is processed as a whole, or the front-end cylinder is processed as a whole, and so on.
  • the cylinder at the front end of the contact tip is milled by milling.
  • the head of the cylinder needs to be milled to remove some material.
  • the other side is processed, and the sides are symmetrical.
  • the front end of the processed cylinder is narrow and the rear end is wide, and the cross-sectional shape of the front end of the cylinder is track-shaped.
  • the gap 1 perpendicular to the processing surface of the cylinder.
  • the length of the gap 1 is 10-30 mm and the height is 2-5 times the diameter of the welding wire.
  • the distance of 5 is consistent with the diameter of the welding wire 2.
  • the front section of the conductive block 5 should be pressed to a certain angle, the purpose is to increase the contact area of the conductive block 5 and the welding wire 2 and improve the conductive performance.
  • the welding wire via hole 24 of the contact tip, the connecting thread 3 and the tightening plane 4 are processed.
  • the conductive block 5 is longer, and the longer conductive block 5 will have better elasticity.
  • the thickness and width of the conductive block 5 need to be controlled during processing to ensure that it does not have sufficient stability in a high temperature environment.
  • the cylinder at the front end of the contact tip is processed directly after the gap 1 is processed.
  • the front and rear ends of the conductive block 5 have the same size.
  • Such a conductive block 5 can also be used. If you want the size of the front end of the contact tip to be smaller, you can also press 5 and cut the front end of the conductive block.
  • the welding wire via hole 24 can be processed in a state where the contact tip is still in the blank 13, and the welding wire via hole can be directly processed into a hole with a diameter equivalent to that of the welding wire 2.
  • Embodiment 8 Under normal circumstances, in use, the diameter of the welding wire via hole 24 is larger and larger as the welding wire 2 is used, and it is not excluded that the welding wire 2 may only be worn in one direction.
  • an angle adjusting gasket can be added to the rear portion 29 of the contact tip.
  • the angle adjustment gasket can be removed, and then the conductive nozzle is tightened on the welding gun. After the angle adjusting washer is taken out, the conductive nozzle is screwed into a deeper depth. In this way, the angle of the gap 1 changes, thereby avoiding the square wire abrasion towards the gap 1.
  • the conductivity of the welding wire 2 is found to be weak, another thickness adjustment pad is added, and the abrasion direction of the welding wire 2 is changed again. In this case, the conductivity of the contact tip is good, and it can be used continuously.
  • the gap 1 is divided into two left and right gaps, and the two gaps are distributed at 180 degrees.
  • the thickness of the adjusting shim cannot be an integral multiple of the pitch of the connecting thread 3 or an integral multiple of a half pitch.
  • the pitch of the connecting thread 3 is 1, then the thickness of the adjusting shim cannot be an integer multiple of 1 and 0.5. If the number of conductive blocks is 3, there will be 3 gaps. If the angle between each two adjacent gaps is 120 degrees, the thickness of the angle adjustment gasket cannot be the pitch of the connecting thread 3. Integer multiple of, one-third of the pitch, and one-third of the pitch. And so on.
  • the number of conductive blocks in the conductive nozzle of the present invention is not limited.
  • the conductive block 5, the elastic conductive block 6, and the thickened conductive block 8 are different technical solutions of a high-temperature-resistant and long-life conductive nozzle, and can be collectively referred to as a conductive block.
  • the conductive combination block 27, the conductive combination recess 33, and the conductive combination bump 36 may Collectively referred to as conductive combination blocks.
  • the manufacturing method of the welding wire via 24 in the present invention is not limited to the above method, and it can also be processed by a conventional method.
  • the manufacturing steps such as machining the outer shape 16 and machining the cylindrical body 19 may also be processed by chipping.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Arc Welding In General (AREA)
  • Spark Plugs (AREA)

Abstract

La présente invention concerne un procédé de traitement pour une pointe de contact de soudage résistante à haute température et à longue durée de vie, comprenant : 1, le traitement d'un espacement (1) dans la section avant d'une pointe de contact ; 2, dans un premier temps, traitement d'un espacement épais pour obtenir l'espacement (1) ; et 3, le raccordement de deux blocs de combinaison conducteurs (27) au moyen d'un ajustement avec serrage. L'invention concerne en outre une pointe de contact de soudage résistante à haute température et à longue durée de vie, dans laquelle 1, la section avant de la pointe de contact comporte des blocs conducteurs à haute résistance supérieur et inférieur (5), et les blocs conducteurs (5) présentent une bonne stabilité dans un environnement à haute température ; 2, la section avant de la pointe de contact comporte un bloc conducteur épaissi (8), et la largeur du bloc conducteur épaissi (8) est inférieure à celle d'un fil de soudage ; 3, la section avant de la pointe de contact est un cylindre allongé, et la tête du cylindre est une tête conductrice (11) et un trou conducteur (12). L'invention concerne en outre un procédé d'utilisation de la pointe de contact de soudage résistante à haute température et à longue durée de vie, comprenant : 1, lorsque les blocs conducteurs (5) sont usés, la pression des blocs conducteurs (5) vers l'intérieur pour maintenir le fil de soudage correctement en contact avec les blocs conducteurs (5), et répétition de ce processus, de sorte que la durée de vie de la pointe de contact puisse être augmentée plusieurs fois ; et 2, une fois que le trou conducteur (12) est usé, compression du trou conducteur (12) vers l'intérieur pour rendre le trou conducteur (12) plus petit, et répétition de ce processus, de sorte que la durée de vie de la pointe de contact puisse être augmentée plusieurs fois ou même plus de dix fois.
PCT/CN2019/105365 2018-09-15 2019-09-11 Pointe de contact de soudage résistante à haute température et à longue durée de vie, son procédé de fabrication et son procédé d'utilisation Ceased WO2020052588A1 (fr)

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CN110076434A (zh) * 2018-09-15 2019-08-02 何强 易于加工的耐用焊接导电嘴及其制造方法
CN110355452A (zh) * 2019-08-11 2019-10-22 何强 精细焊接导电嘴及其制造方法
CN112739483A (zh) * 2019-08-11 2021-04-30 何强 高导电耐用焊接导电嘴
CN112427785A (zh) * 2020-06-22 2021-03-02 何强 高导电耐用焊接导电嘴与方法
CN114406421A (zh) * 2020-06-13 2022-04-29 何强 易调节耐用焊接导电嘴与方法

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