KR200329160Y1 - Die of bolt for looseness protect - Google Patents

Abstract

The present invention relates to the die of the bolt for preventing loosening, the conventional die has to go through a number of processes, such as the individual molding of the body, the pin, the projection and the groove processing and assembly for assembling the same, There were many factors that led to the cost increase, such as the effect of preventing loosening and lower productivity due to replacement of pins and protrusions.

Accordingly, the present invention, in forming the valley forming grooves 111 and the valley forming hills 112 on the molding surface of the die body 100, the valleys 212 that are formed as the existing hill 112 in the bolt 200 A second mountain portion 122 which forms a second valley 222 to protrude flesh while being lower than); A second valley portion 121 for forming a planar second screw thread 221 so that the flesh is protruded while being wider than the screw thread 211 formed by the valley portion 111; It is formed by repeating the pressing at regular intervals in the direction perpendicular to the existing valleys and peaks 112, when the bolt and the nut is fastened away from the weave section of the second screw thread and the second valley Filled in the gap between the neck and the nut is tightly tightened, so the bolt and nut are excellent in preventing loosening, and the effect of energizing and waterproofing can be expected.

Description

Die of bolt for looseness protect}

The present invention relates to the die of the anti-loosening bolt, and more particularly, when the manufactured bolt is fastened with the nut, the flesh of the weave section is detached and filled with the nut thread so that the fastening gap is minimized. Prevention, of course, relates to the die of the anti-loosening bolt, which can see the effects of energization and waterproofing.

In general, when a bolt wound in a roll enters the forming part of a forging machine (heading machine), the bolt is cut into a fixed length, moved to a fixed die, and then fixed by a blow mold of a reciprocating shuttle. It is made of a bolt material provided with a head and a body part by the forging method of hitting the material of the bolt material is then completed by a spiral is formed on the end of the body portion by a rolling die of the rolling machine bolts.

Here, the rolling machine for processing the spiral portion on the body of the bolt material is fixed to one of the two screw dies, the other die is installed as a reciprocating movable type, the bolt material through the material supply line When the rows are supplied in a row, one by one, continuously supplied to the forming surface between the fixed dice and the movable dice, the movable dice are subjected to a rolling process of rubbing the end of the body of the bolted material into which the screw is entered while repeating the reciprocating motion, thereby forming a bolt.

At this time, the conventional die for making the bolt to prevent loosening by rolling the bolt in the form of a screw cutting shape is formed in the same interval of the shape of the threaded portion without thread on the bolt body, after the assembly of the bolt the shape of the portion is loosened When receiving, the shape of the stamped part of the bolt on the counterpart prevents the force of loosening so that the loosening is prevented.

However, the conventional die making the bolt for preventing loosening has a problem in that the production cost is high because the die must be subjected to a process such as discharging and assembling a pin therein after the electric discharge machining or the wire processing.

That is, in the case of the die body 10, as shown in FIG. 1, a material cutting process of cutting a die base material into a predetermined size using a cutting machine; Processing the plane, angle, and length of the cut die body 10 with a vertical machine; According to the shape of the die body 10, the end mill, the electric discharge machining, the wire machining, and the tap machining are selected to process the pins 20 and the grooves 11 and 12 for inserting the release protrusions 30, etc. Manufacturing process; Heat treatment process; Planar polishing process using a planar polishing machine; Machining of the thread-formed surface 13 of the surface polished surface; Chamfering work steps are performed in sequence.

And, the pin 20 and the release protrusions 30 are assembled to the die body 10, each material cutting process using a cutting machine; Plane, angle and length machining processes using vertical machines; Heat treatment process; The shaping | polishing process of processing the shape of the pin 20 and the release protrusion 30 is performed.

Thereafter, the pin 20 and the release protrusions 30 are shipped through an assembling process and a sand working process, which are fitted into the grooves 11 and 12 of the die body 10, and the assembly thereof is conventionally manufactured. It can be seen from Fig. 2a showing a state in which the pin and the release protrusion is coupled to the die body of Fig. 2 and Fig. 2b showing the same state in front view.

Therefore, such a conventional die manufacturing process has to go through various processes such as processing the grooves 11 and 12 for assembling the pin 20 and the protrusion 30 to the die body 10, and the pin 20 and the protrusion ( There is a problem in that the manufacturing cost is high because it has to go through a multi-step such as the process of separately making and assembly 30).

3 is a front view of a bolt made of a conventional die, and FIGS. 4A and 4B are enlarged cross-sectional views of lines AA and BB of FIG. 3, in which pins 20 and protrusions 30 are assembled to prevent bolts from loosening. Conventional die that is to be stamped portion 41 and 42 to be made in the shape of the stamping portion 41, 42 on the bolt body 40 when rolling by using the pin 20 and the projection 30 protruding from the molding surface thereof (42) prevents loosening.

However, such a conventional bolt for preventing loosening portion 41, 42 is formed in only one portion of the upper and lower portions of the bolt body 40, so the portion of the bolt and nut of the clamping portion 41 ( 42) Suppresses the force of loosening only in the part having a shape, but not restraining loosening in the remaining part, and severe impact from the outside because there is a gap between the threaded part of the bolt and nut fastened in the part of the stamping part (41) (42) If you have a back, there is a tendency that the power to suppress the loosening falls, preventing the loosening.

In addition, the conventional die for bolts for preventing loosening due to the short product life of the pin 20 and the projections 30 compared to the die body 10, stops the rolling operation and frequently pull out the dies 20 and the projections 30 Because of this, the productivity of the replacement has to be significantly reduced, which leads to a cost increase of the die and the bolt, and the conventional die could not expect the effect of energization or waterproofing.

Therefore, the present invention was developed to solve the conventional problems as described above, and an object of the present invention is that the flesh away from the weave section when the machined bolt is engaged with the nut to fill the gap with the nut thread The tightening gap is minimized to provide a die of the anti-loosening bolt that can not only prevent loosening but also provide effects of energization and waterproofing.

1 is a process chart for manufacturing a conventional dice

2A and 2B are a plan view and a front view showing a state in which a pin and a release protrusion are coupled to a conventional die body;

3 is a front view of a bolt made of a conventional die

4A and 4B are partially enlarged cross-sectional views taken along line A-A and line B-B of FIG.

5 is a process diagram illustrating a process of making the inventive design die

Figure 6 is a plan view of the dice in which the present invention is implemented

7A and 7B are partially enlarged cross-sectional views taken along lines C-C and D-D of FIG.

8 is a perspective view illustrating an example of a presser for performing a pressing process of the present invention

9 is an enlarged front view illustrating a part of the presser of the present invention.

10 is a front view showing a state in which the nut is coupled to the bolt made of the die of the present invention

11A, 11B, and 11C are enlarged cross-sectional views of portions of the E-E line, the F-F line, and the G-G line of FIG. 10.

12A is an enlarged cross-sectional view illustrating a coupling state between a second screw thread of a bolt and an inner diameter of a nut;

Figure 12b is an enlarged cross-sectional view showing a coupling state of the existing thread of the bolt and the nut inner diameter

Explanation of symbols for main parts of the drawings

100: die body 110: forming surface

111: bone 112: gynecological part

121: second bone 122: second mountain

200: bolt 211: thread

212 valley 221 second thread

222: the second valley 300: pressing sphere

Hereinafter, described in detail by the accompanying drawings the technical configuration and operation of the preferred embodiment that can effectively achieve the above object of the present invention.

FIG. 5 is a process diagram illustrating a process of making a die of the present invention, FIG. 6 is a plan view of a die on which the present invention is implemented, FIG. 7A is an enlarged cross-sectional view of part of the CC line of FIG. 6, and FIG. 7B is a DD line of FIG. 6. It is an enlarged cross section.

As shown in the die configuration of the present invention in the forming surface of the die body 100, the thread portion 211 of the bolt 200 for forming the valley portion 101 and the valley 212 of the bolt 200 for forming the peak portion 112 ) Is continuously formed at regular intervals along the inclination angle of the screw to be formed on the bolt 200, which can be said to be the same as a conventional bolt processing die.

The die of the present invention has a lower portion than the valley 212 formed by the peak portion 112 on the forming surface 110 of the die body 100 and the second peak portion 122 forming the second valley 222 so that the flesh protrudes. ), And the second bone portion 121 forming the second screw thread 221 of the flat type having a wider width and lower width than the screw thread 211 formed by the bone portion 111, the existing bone portion 111 and the peak portion. It is characterized in that it is formed repeatedly by pressing at regular intervals in the direction orthogonal to (112).

The process of making the die of the present invention formed as described above will be briefly described for each process as shown in FIG. 5. That is, it is made through the process of cutting material for die ⇒ plane, angle and length ⇒ tapping ⇒ plane grinding ⇒ threading ⇒ pressing ⇒ plane grinding ⇒ serration ⇒ finishing ⇒ heat treatment ⇒ sand ⇒ shipment More detailed description is as follows.

1st process (Dice material cutting process)

The die base material is cut to a suitable size with a cutting machine to prepare a die body (100).

2nd process (plane, angle, length machining process)

The outer surface of the prepared die body 100 is processed according to the plane, angle and length thereof so as to form the shape of the die body 100 to be made by the vertical machine.

3rd process (Tab processing process)

A hole for mounting a jig on a portion such as the side of the die body 100 subjected to the above process is formed by tapping with a drilling machine.

4th process (plane polishing process)

One surface to be threaded of the tapped die body 100 is polished with a flat grinding machine to uniformly process the flat surface.

5th process (Threading process)

The thread for dies is continuously processed at a predetermined angle and interval using a screw grinder on the planar polished surface of the die body 100 to form a thread forming surface 110.

6th process (pressing process)

8 and 9 are a perspective view and a front view showing a pressing hole for performing the pressing process of the sixth process, the pressing surface of the pressing hole 300 having a lower end of the "V" type is the valley for forming the second mountain portion 122 The 301 and the second valley part 121 are formed with a hill 302 for forming, and are orthogonal to the existing valleys 111 and the hill 112 forming the threaded surface 110 of the die body 100. The pressing operation step of repeatedly forming the second peak portion 122 and the second valley portion 121 with the pressing hole 300 at a predetermined interval in the direction is performed.

7th process (plane polishing process)

Since the flat surface is rough during the pressing operation, the screw forming surface 110 of the pressed die body 100 performs a process of evenly polishing the flat surface again using a plane polishing machine.

8th process (serialization process)

The screw forming surface 110 of the die body 100 subjected to the above process is subjected to a process of processing the serration in the upper and lower portions as a means for preventing the bolt flowing in during the rolling operation of the bolt.

9th process (imaginary work process)

Since the deformation occurs in the die body 100 during the pressing operation and the serration operation in the process, the finishing operation of removing the deformed portion and correcting the squareness is performed.

10th process (heat treatment and sand work process)

When the die body 100 subjected to the finishing work is heat-treated and the sand work of each plane is performed, the die of the present invention is completed and may be shipped in such a state.

FIG. 10 is a view illustrating a state in which a nut is coupled to a bolt made by rolling with a die of the present invention, and FIGS. 11A, 11B, and 11C are enlarged cross-sectional views of a portion of an E-E line, an F-F line, and a G-G line of FIG. 10.

The bolt 200 made of a die of the present invention has a valley 212 and a thread 211 formed of the peak portion 112 and the valley portion 111 of the forming surface 110 in a state in which a plurality is separated as shown in FIG. 11A. Between the separated thread 211 and the thread 211, the second screw thread 221 and the second valley 222 of a low position are formed as shown in FIG.

At this time, the second screw thread 221 is lower than the existing screw thread 211 and is wider in width, so that the flesh of the second screw thread 221 and the second valley 222 is as shown in FIG. 11C. And protrudes from both sides of the valley 212.

And, since the screw thread 411 of the inner diameter of the nut 400 is structured to be fitted so that a minute space exists between the existing thread 211 of the bolt 200, such a nut 400 made of a die of the present invention ( When coupled to the 200, the protruding portion of the second screw thread 221 wider than the existing screw thread 211 of the bolt 200 is cut by the screw thread 411 of the inner diameter of the nut 400. Here, reference numeral 412 in the drawing is a spiral valley of the nut 400 inner diameter.

That is, FIG. 12A is an enlarged cross-sectional view showing that a significant space is formed between the second screw thread of the bolt and the nut inner diameter when the bolt and the nut are fastened, and FIG. 12B is an enlarged cross-sectional view showing the coupling state of the existing screw thread and the nut inner diameter of the bolt. In the space between the second screw thread 221 and the nut 400 and between the existing screw thread 211 and the nut 400, a chip generated while the protrusion of the second screw thread 221 is cut is tightly filled. The nut 400 and the bolt 200 that are fastened once are made to have a state that does not loosen even in a severe external shock.

And, since the bolt 200 is made of a die of the present invention is the second screw thread 221 and the second valley 222 for preventing loosening is formed to be repeated from the tip end of the bolt 200 as a whole nut 400 Loosening prevention can be made firmly at any part when tightening.

As described above, in the present invention, when the bolt and the nut are tightened, the nut is fastened while the flesh dropped from the weave section of the second screw thread and the second valley is filled in the gap space between the nut curved part and the nut is fastened. The tightening gap is minimized to prevent the bolt and nut from loosening even in the severe impact from the outside.As the above, the tightening gap between the bolt and nut is firmly tightened with the flesh away from the weave section, so that the effect of energization and waterproofing is achieved. It can be seen together.

Claims (1)

In forming a rolling die in which the thread forming valleys 111 and the valley forming peaks 112 of the bolt 200 are repeatedly formed at regular intervals according to the inclination angle of the screws on the forming surface of the die body 100, A second hill portion 122 which forms a second valley 222 to protrude flesh while lowering the valley 212 formed in the bolt 200 as an existing hill portion 112; A second valley portion 121 for forming a planar second screw thread 221 so that the flesh is protruded while being wider than the screw thread 211 formed by the valley portion 111; The die of the bolt for preventing loosening, characterized in that formed by repeatedly pressing at regular intervals in the direction orthogonal to the existing valleys and peaks 112.