KR20030029605A - Weldment clamping device - Google Patents

Abstract

The welding material (welding object or object to be welded) clamping device disclosed in the present invention is three clamps which are installed at equal intervals so as to face the center direction (welding position) in which the welding material is located, and a single air for rotating or rotating the rotating plate forward and backward. A link mechanism that connects the cylinder, the rotating plate, and the clamp to move the clamp forward and backward in accordance with the forward / reverse rotation state of the rotating plate, the grounding electrode that almost transmits the welding power without loss, and moves up or down to the welding position. It consists largely of a roller mechanism for rolling contact and clamping on the surface of the weldment before fully clamping the descending weldment, and the three clamps, which are interlocked (forward and backward reciprocation) by the link mechanism and the rotating plate, are moved forward by one actuator. And firmly clamp the weldment while reversing.

Description

Weldment Clamping Device

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to a weldment clamping device having a simple configuration for firmly pressing a rounded weldment (welding object) in three directions.

For convenience of description in the present invention, when performing welding on a relatively round body portion, such as an air compressor, it will be described as an example of clamping firmly so that the weldment does not move.

In general, in order to weld a weldment, it is firmly held by the clamping device to prevent the weldment from moving or flowing for a certain period before and after the welding period and the welding period.

1 is a conventional weldment clamping device 10 for clamping both sides of the body (4) of the air compressor to weld the cap (6) (8) coupled to the upper and lower parts of the body (4) of the air compressor (2) Is a plan view and a partial cross-sectional view of FIG. 2, and FIG. 2 is a side view of a state where both sides of the air compressor 2 are clamped by a welding jaw (V block).

The weldment clamping device (10) is a planar block (16) for clamping in a manner of pressing both sides of the air compressor (2) transferred to the welding position while moving forward and backward by the respective air cylinders (12) (14) And a V block 18 are installed, and the planar block 16 and the V block 18 are provided with reciprocating guide means for inducing their reciprocating motion and grounding means for electric welding, respectively. It can be clamped and welded.

Support blocks 28 and 30 in which a pair of guide tubes 24 and 26 are coupled to both sides of the bottom surface of the support plate 22 formed at the center of the access space 20 through which the air compressor 2 can enter and exit. The guide rods 24 and 26 are symmetrically fixed to each other, and the guide rods 32 and 34 are coupled to each other so as to slide. The planar blocks 16 and the front ends of the guide rods 32 and 34 are coupled to each other. Each of the V blocks 18 is fixed, and the planar blocks 16 and V blocks 18 are also fixed to the rod ends of the air cylinders 12 and 14 positioned between the guide tubes 24 and 26, respectively. .

Accordingly, the planar block 16 and the V block 18 move forward or backward along the guide means according to the protruding or immersed state of the rods 12 and 14 of the rod, and the planar block 16 as shown in FIG. When the clamping of the air compressor 2 is completed by advancing the and V blocks 18, one or more welding torches (or welding electrodes) 44 move along the welding line 46 to perform welding.

In addition, the ground electrodes 36 and 38 installed at the tip of the planar block 16 and the V block 18 are connected to the ground lines 40 and 42 to form a ground groung, and the V block 18 is formed. The connecting member 48 is fixed to the end of the guide rod (34) is connected to, and one side of the connecting member 48 is a screw-type adjustment device 50 that can finely adjust the degree of protrusion of the stopper (52) It is provided so that the advancement degree (reference position) of the V block 18 can be set manually.

That is, when the V block 18 is advanced by the operation of the air cylinder 14 to clamp the air compressor 2 as shown in FIG. 2, the connecting member 48 is also advanced along the end of the connecting member 48. As the stopper 52 installed in contact with the rear end surface of the connection block 30, the forward of the V block 18 is stopped.

In addition, when the model of the air compressor 2 is changed or the outer diameter is changed, the clamping position is changed, so that the forward stroke of the V block 18 is determined by manually adjusting the adjuster 50, and the entrance space 20 is surrounded. The cover 54 installed in the cover 54 prevents slag or flux generated during welding from falling down to prevent damage to the welded material or contamination around the workplace.

On the other hand, the weldment clamping device 10 has a variety of problems because the planar block 16 and the V block 18 is a two-point clamping method for holding both sides of the air compressor (2) while moving forward and backward.

For example, since both side blocks 16 and 18 are individual movements, when the model of the air compressor 2 is changed or the outer diameter and shape are changed, it is inconvenient to change the clamping position of the blocks 16 and 18 manually. In addition, since the reference point of the planar block 16 is a forward movement or a less forward individual movement, if the welding center or concentricity of the air compressor (2) is distorted, welding failure occurs.

And, the narrower the welded area, the lower the welding position (welding point), and the worsening of the welding defects is further exacerbated.

Then, if the air compressor (2) is inclined to rise to the welding position or the loading is incorrect, the air compressor (2) is not established, the welding position is distorted.

In addition, since the air compressor 2 is clamped on both sides in a two-point manner, if the clamping and welding are performed several thousand to tens of thousands, the clamping position and the welding position are distorted, resulting in welding failure.

Therefore, in the present invention, the three clamps interlocked by the link mechanism and the rotary plate (forward and backward reciprocating motion) is a welded to clamp the weld (welded object or welded object) during the welding period while moving forward and backward by one actuator. It is an object to provide a clamping device.

In order to achieve the above object, three clamps are installed at equal intervals so as to face the center direction (welding position) where the weldment is located, a single air cylinder for forward or reverse rotation of the rotating plate, and the rotating plate and the clamp are connected to each other. Link mechanism for moving the clamp forward and backward according to the forward / reverse rotation of the rotating plate, grounding electrode for firmly grounding the welded material to improve welding accuracy and welding quality, and welded material which rises or falls to the welding position before and after welding. It consists largely of idle rollers in contact with the surface.

1 is a plan sectional view and a front sectional view of a conventional weldment clamping device.

2 is a cross-sectional view of a conventional weldment clamping device in use.

3 is a plan view of the weldment clamping device of the present invention.

4 is a plan sectional view of the weldment clamping device of the present invention.

Fig. 5 is a plan sectional view of the weldment clamping device of the present invention.

6 is a cross-sectional view of a structural part of the present invention weld clamping device.

7 is a plan view of a rotating plate of the weldment clamping device of the present invention.

8 is a bottom view of a supporting plate of the weldment clamping device of the present invention.

9: longitudinal section of the clamp part of the weldment clamping device of the present invention;

10 is a longitudinal sectional view of the weldment clamping device of the present invention.

11 is a longitudinal cross-sectional view of the use of the present invention welded clamping device.

12 is a front view of the present invention V block portion.

13 is a partial cross-sectional view of the present invention ground electrode.

<Description of the symbols for the main parts of the drawings>

(2)-air compressor (4)-body of air compressor

(6) (8)-cap (10) (60)-weld clamping device

(12) (14) (130)-Air Cylinder (16)-Flat Block

(18) (102)-V Block (20)-Space

(22) (62)-Support Plate (24) (26)-Guide

(28) (30) (129)-support block (32) (34)-guide bar

(36) (38) (122)-Ground electrodes (40) (42) (124)-Ground wires

(44)-Welding Torch (46)-Welding Line

(48) (137)-Connector (50)-Regulator

(52)-stopper (54) (126)-cover

(64)-welding space (66)-connection ring

(67)-Hole (68)-Long

(70)-Spinning Plate (71)-Soccer

(72)-Jang Ring (74) (76) (78)-Clamp

(80)-Indentation Groove (81) (104)-Bolt

(82)-LM Block (84)-Guide

(86)-Motion Block (88)-LM Rail

(90)-support member (92) (98)-link

(95) (97) (101)-needle bearings (106) (108)-through

(94) (96) (100) (114) (116) (132) (138)-pin (shaft pin)

(110) (112)-Idle Rollers (118) (120)-Slope

(127)-Border (128)-Curve

(134)-connection plate (136)-air cylinder rod

(140) (142) (144)-Hall Sensor (148)-Storage Room

(150)-Housing (152) (154)-Guide

(156)-Spring (158) (160)-Jut

In describing the present invention, the weld clamping device will be omitted in order not to obscure the subject matter of the present invention. Hereinafter, described in detail with reference to the accompanying drawings a preferred embodiment of the present invention.

According to the present invention, the welding device (welding object or the object to be welded) is clamped by the link mechanism and the rotating plate, and the three clamps which interlock with each other (forward and backward reciprocating motion) move forward and backward by one actuator while the welding object is welded. It is characterized by being firmly clamped, and the welding period includes substantially the time when the welding is made and the time during which the weld is clamped before and after welding.

In the present invention, the welding clamping device is an example in which a plurality of clamps are radially evenly arranged, but of course, the clamps may be unevenly disposed or installed according to the shape or shape of the weldment, and also four or four. It will be appreciated that the above clamps can be arranged or installed evenly or evenly to achieve the object of the present invention.

3, 4 and 5 are a plan view and a planar cross-sectional view of the weldment clamping device 60 of the present invention, Figure 6 is a structural cross-sectional view showing the installation state of the support plate, the rotating plate and the connecting ring, Figure 7 is a plan view of the rotating plate, 8 is a bottom view of the support plate, FIG. 9 is a partial cross-sectional view of the LM block, FIGS. 10 and 11 are longitudinal cross-sectional views of the weldment clamping device 60, and FIG. 12 is a front view of the clamp portion of the weldment clamping device 60.

In the present invention, the welding clamping device 60 is formed in the center of the support plate 62, the welding space 64 of the size that the air compressor 2, which is a welding object, can naturally enter and exit, and is formed on the bottom surface of the support plate 62. As shown in FIG. 6, the cylindrical connecting ring 66 is fastened, and a triangular rotating plate 70 in which the long hole 68 and the shaft hole 71 are formed on the lower outer circumferential surface of the connecting ring 66 is rotated forward and backward. It is axially coupled to the lower end of the connecting ring 66 is coupled to the outward locking ring 72 to prevent the separation and separation of the rotating plate 70 while helping the sliding rotation of the rotating plate 70.

A portion in contact with the rotating plate 70, such as between the rotating plate 70 and the connecting ring 66 or between the rotating plate 70 and the engaging ring 72 or between the rotating plate 70 and the connecting ring 66 and the rotating plate 70. ) And a bearing between the locking ring 72 to reduce rotational friction of the rotating plate 70.

The rotating plate 70 is an example of a triangular shape, of course, can be configured in a circular shape, an elliptical shape or a polygonal shape, of course.

On the bottom surface of the support plate 62, three clamps 74, 76 and 78, which are directed to the welding space 64, are distributed at equal intervals (120 ° intervals), and the clamps 74, 76 and 78 are provided. The V blocks 102 are fixed to the front ends of the V blocks 102, and the V blocks 102 enter and exit the welding space 64 through respective holes 67 formed in the connection ring 66.

The clamps 74, 76 and 78 are provided in three to equally press the air compressor (2) in three directions, the configuration and effect is the same or the same, so in the present invention one clamp (74) The configuration and operation of the present invention will be described, and the overall effect will be described later.

8 and 9, the clamp 74 has a rectangular concave groove 80 facing the welding space 64 at the bottom surface of the support plate 62 at equal intervals, and has an LM in the concave groove 80. The block 82 is coupled and fastened to the bolt 81, and a guide groove 84 having a locking structure is formed in the longitudinal direction at the bottom of the LM block 82.

Concave groove is formed in the longitudinal upper surface of the movement block 86, the LM rail 88 is fixedly coupled to the concave groove is coupled to the guide groove 84 so as to slide. Therefore, the V block 102 fixed to the tip of the movement block 86 and the movement block 86 may linearly move (forward and backward movement) along the LM rail 88 in the direction of the welding space 64 without great friction. It becomes possible.

The downwardly protruding support members 90 are fixed to edge portions of the recessed grooves 80 formed in the support plate 62, and one side end of the link 92 is pin 94 on the bottom surface of the support member 90. Shaft is installed.

The shaft pin 96 is loosely coupled to the long hole 68 of the rotating plate 70 to protrude upward, and the other end of the link 92 and one side end of the other link 98 are formed on the protrusion of the shaft pin 96. The other end of the link 98 is coupled to the pin 100 on the bottom surface of the tip of the movement block 86.

In addition, the needle bearings 95, 97, and 101 are coupled to the shaft pins 94, 96, and 100, respectively, to greatly reduce frictional resistance due to movement.

In the present invention, since the support member 90 and the LM block 82 are coupled and fastened to the recess groove 80 formed in the support plate 62, their installation is easy and flow is prevented.

In addition, in FIG. 4, the force F that pushes the rotating plate 70 in the clockwise direction and the longitudinal center line L of the long hole 68 do not intersect at right angles, but cross at an angle, thereby being loaded by the operation of the air cylinder 130. When the protrusion 136 protrudes, the pin 94 positioned at the outer portion of the long hole 68 may move inward of the long hole 68.

Meanwhile, when the air cylinder rod 136 protrudes to clamp the welding target air compressor 2, the rotating plate 70 rotates in a clockwise direction, and the pin 94 coupled to the long hole 68 of the rotating plate 70. It moves inwardly of the long hole 68, the two links 92, 98 coupled to the pin 94 is straightened in a straight line as shown in Figure 5 of the movement block 86 and the movement block 86 The V block 102 fixed to the tip is advanced to the welding space 64 through the hole 67 to clamp the air compressor 2 to be welded, and the clamped air compressor 2 is the welding torch 44. Welding is performed by

The welding torch 44 is connected to a welding controller is supplied with the electrical energy required for welding and the welding rod for welding, such that welding is performed according to the set welding conditions for a predetermined time and a predetermined period, this technique is already popular in the industry Since the technology is a detailed description thereof will be omitted.

On the other hand, the V block 102 is fastened to the distal end of the movement block 86 by a plurality of bolts 104, and the idle rollers are formed in the through holes 106 and 108 formed at the upper and lower portions of the V block 102. 110 and 112 are axially mounted to the pins 114 and 116, respectively.

In addition, when looking at the plane of the V block 102, the inclined surfaces 118 and 120 that gradually open toward the front end to be able to press the body 4 portion of the air compressor 2 having a rounded shape are symmetrically on both sides. It is formed to firmly press the surface of the air compressor (2).

At this time, the air compressor 2 introduced into the welding space 64 raises or lowers the welding space 64 and the V block 102 moves forward.

Therefore, the surface of the air compressor 2 may be damaged while the air compressor 2 and the V block 102 are in contact with each other. However, when the air compressor 2 is raised or lowered, The first rollers 110 and 112 are installed to be in contact with the lifter or lower, and the idle rollers 110 and 112 are brought into contact with the clouds, thereby preventing damage to the surface of the air compressor 2, and by the final pressing force. (2) Solid clamping is achieved.

Then, the ground is made by the contact of the conductive ground electrode 122 installed on one side of the V block 102, the ground electrode 122 is connected to the welding power supply (not shown).

In addition, a cover 126 that moves forward and backward along the V block 102 is fixed to the upper portion of the V block 102, and a cover type edge 127 is installed around the support plate 62.

The cover 126 is an unfolded fan shape, the arc portion 128 is formed in the tip portion is not in contact with the clamped air compressor (2), when the air compressor is clamped than the welding line 46 as shown in FIG. Since the cover 126 is located at a slightly lower position and covers the upper part of the clapping device 60 of the present invention as a whole, slag or foreign substances generated during welding are covered by the cover 126 around or under the cover 126. Contamination by falling or falling is prevented.

In addition, the cover type edge 127 blocks the foreign matter flowing into the welding space 64 from the outside of the cover 126.

A support block 129 is fixed to one side of the bottom surface of the support plate 62, and a rear portion of the air cylinder 130 is axially installed by the pin 132 on the support block 129, and fixed to one side of the rotating plate 70. The connecting plate 134 is connected to the connecting member 137 by the pin 138, and the connecting member 137 is coupled to the rod 136 end of the air cylinder 130.

Accordingly, the plurality of clamps 74, 76, 78 advance simultaneously in the operating state of the air cylinder 130 to clamp the air compressor 2, and the plurality of clamps 74, 76, 78 At the same time, it reverses to release the clamping of the air compressor 2.

That is, when the rod 136 of the air cylinder protrudes, the rotating plate 70 rotates forward clockwise, and the links 92 and 98 are unfolded so that the three clamps 74, 76 and 78 move forward simultaneously. (2) is clamped, on the contrary, when the rod 136 is immersed, the rotating plate 70 rotates counterclockwise and the links 92, 98 are folded and the three clamps 74, 76, 78 Since the reverse at the same time the clamping of the air compressor (2) is released.

In addition, a plurality of Hall sensors 140, 142, 144 connected to a controller (not shown) are attached to a surface of the air cylinder 130 to determine a stroke of the air cylinder 130.

In the case of using the hall sensors 142 and 140 positioned at the center and the rear end of the hall sensors 140, 142 and 144, the rod 136 may be moved by the two hall sensors 142 and 140. When the stroke is determined and the operation stroke is to be lengthened, the hall sensor 144 located at the front end and the hall sensor 140 located at the rear end may be used.

In this case, the two types of air compressors 2 having different outer diameters can be selectively clamped and welded, and, of course, when the models of the air compressors 2 are different, the attachment of these hall sensors 140, 142, 144 is possible. By adjusting the position properly, the clamping distance and the clamping pressure can be adjusted.

13 is a partial cross-sectional view of the ground electrode 122 supported by a spring.

That is, the housing 150 in which the storage chamber 148 is formed and a pair of upper and lower guide members 152 and 154 are installed on one side (or both sides) of the V block 102, and inside the storage chamber 148. The ground electrode 122 which is supported by a plurality of springs 156 is installed.

The protruding stepped portion 158 formed at the rear end of the ground electrode 122 is caught by the rear end of the guide members 152 and 154 having a stopper function, and further advancement is suppressed, and the front end of the ground electrode 122 is V It protrudes to the tip of block 102.

The ground electrode 122 is more protruding than the tip of the idle roller 110, 112, but the electrical contact while contacting the body (4) portion of the air compressor (2) which is a conductor by the spring 156, the support structure (Welding groung) is made, as shown in Figure 12, the guide member 152, 154 is a stepped portion 160 to prevent the departure while allowing the slide movement of the ground electrode 122 is formed symmetrically.

The corner portion of the ground electrode 122 is not sharply curved so as not to damage the surface of the body 4 when contacting the body 4 portion of the air compressor 2.

Meanwhile, when the air cylinder rod 136 is protruded by the controller for welding, the rotating plate 70 rotates clockwise, and the pin 94 coupled to the long hole 68 of the rotating plate 70 has a long hole as shown in FIG. 5. It will move inward of the 68, thus straightening the two links 92, 98 coupled to the pin 94.

Therefore, three movement blocks 86 and V blocks 102 installed at an angle of 120 ° are advanced simultaneously in three directions through the holes 67 to clamp the air compressor 2 to be welded as shown in FIGS. 5 and 11. do.

That is, since the idle rollers 110 and 112 holding the air compressor 2 are respectively installed at the upper and lower portions of the clamps 74, 76 and 78, the three upper idle rollers are positioned at 120 degrees as shown in FIG. Since the six points are pressed by the 112 and the three lower idle rollers 110, the air compressor 2 is precisely positioned and clamped at the welding center of the welding space 64, and the clamping is maintained at an even pressure.

In addition, since the ground electrode 122 supported by the spring 156 makes excellent electrical contact with the surface of the body 4 of the air compressor, welding defects are prevented, productivity is improved, and the clamped air compressor 2 Since is supported by the transfer or conveying conveyor or the conveying bogie, even if it is pressed by the idle roller (110, 112) is prevented such problems that the air compressor (2) falls down due to its own weight or the clamping is broken.

And, in order to release the clamping in order to transfer the welded air compressor (2), when the air cylinder rod 136 is immersed by the controller, the rotating plate 70 is rotated counterclockwise, the rotating plate 70 The pin 94 coupled to the long hole 68 is moved to the outside of the long hole 68, so that the two links 92 and 98 coupled to the pin 94 are bent as shown in FIG. The clamping of the air compressor 2 is released because the V block 102 fixed to the tip of the 86 and the movement block 86 is retracted back to the original position through the hole 67, and in this state, transfer or transfer is performed. With the help of the conveyor, the welded air compressor (2) is discharged from the welding space (64), and then a new welding target air compressor is moved to the welding space (64). do.

Of course, a plurality of spot welding can be achieved by rotating and re-clamping the air compressor 2 using a transfer having a rotating mechanism, and then releasing clamping after welding.

Reference numeral 146 is a piece for fixing the ground wire.

As mentioned above, the weld clamping device 60 of the present invention is exemplified by the radially equal position of the clamps 74, 76 and 78, but of course unevenly according to the shape or shape of the weld. It may be arranged or installed, and may be arranged or installed in four or more than four while being equal / uneven to achieve the object of the present invention.

The present invention as described above is not limited to the present embodiment and the accompanying drawings, various substitutions, modifications and changes are possible within the scope without departing from the technical spirit of the present invention, which is usually in the art It is self-evident for those who have knowledge.

As described above, the present invention has a structure in which three clamps interlock at the same time with one air cylinder, thereby providing a simple and accurate clamping structure.

In addition, since the ground area is increased by the three ground electrodes, the current flow is improved, thereby improving weldability and productivity, thereby doubling the productivity.

In addition, the idle rollers are installed on the upper and lower ends of the V block, and the final clamping is performed while the rolling contact is made with the air compressor entering / exiting into the welding space, thereby preventing damage to the air compressor.

In addition, since there is almost no clamping defect, there is no effect that the assembly line does not stop, thereby greatly improving welding quality and productivity.

Claims (6)

A plurality of clamps 74, 76 and 78 are provided at equal intervals on the support plate 62 formed at the central portion of the welding space 64, and the coupling ring 66 fixed to the bottom of the support plate 62 is fixed to the shaft. The rotating plate 70 is installed, the air cylinder 130 for rotating the rotating plate 70 forward and reverse, and the rotating plate 70 and the plurality of clamps 74, 76, 78 are connected to the forward and reverse rotation of the rotating plate 70 Links 92 and 98 for simultaneously moving the plurality of clamps 74, 76 and 78 forward and backward depending on the state, and V blocks fixed to the ends of the plurality of clamps 74, 76 and 78 ( 102 and a weld clamping device consisting of an idle roller and a ground electrode provided at the tip of the V block (102). The method according to claim 1; The plurality of clamps 74, 76, 78 fasten the LM block 82 to the recessed groove 80 of the support plate 62, and the LM rail 88 in the guide groove 84 of the LM block 82. ) Is fixed to the bottom surface of the LM rail 88, the motion block 86 is fixed, the V block 102 at the distal end of the motion block 86, and the support plate 62 One side end of the link 92 is axially installed on the bottom surface of the fixed support member 90 with the pin 94, the shaft pin 96 is loosely coupled to the long hole 68 of the rotating plate 70, and the shaft pin 96 The other end of the link 92 and the other end of the link 98 is axially coupled to the protrusion of the (92), and the other end of the link 98 is shafted by the pin 100 on the bottom end surface of the movement block 86 And an idle roller (110) (112) in the upper and lower through holes (106) and (108) of the V block (102). The method according to claim 1 or 2; Weld clamping device, characterized in that the force (F) for pushing the rotating plate 70 in the clockwise direction and the longitudinal center line (L) of the long hole (68) to cross at an angle. The method according to claim 2; The ground electrode 122 which is supported by the spring 156 is provided in the storage chamber 148 of the V block 102, and the stepped portion that is caught by the guide members 152 and 154 at the rear end of the ground electrode 122. Weld clamping device formed by forming 158. The method according to claim 1 or 2; Weldment clamping device formed by symmetrically forming the inclined surfaces 118, 120 that gradually open toward the front end of the V block 102. The method according to claim 1 or 2; Weld clamping device formed by forming a plurality of holes (67) through which the V block 102 enters and exits the connection ring (66), and connects the engaging ring (72) to the lower portion of the connection ring (66).