CN212944698U

CN212944698U - Cold extrusion die

Info

Publication number: CN212944698U
Application number: CN202021271463.9U
Authority: CN
Inventors: 朱君荣
Original assignee: Wenling Jiaxuan Machinery Co ltd
Current assignee: Zhejiang Jiaxuan Machinery Co ltd
Priority date: 2020-07-01
Filing date: 2020-07-01
Publication date: 2021-04-13
Anticipated expiration: 2030-07-01

Abstract

The application relates to a cold extrusion die, which comprises an upper die and a lower die, wherein the lower end of the upper die is provided with an upper cavity, the upper end surface of the lower die is provided with a lower cavity, the side wall of the lower cavity is also provided with a forming part, the cold extrusion die further comprises a protection ring, the protection ring is sleeved on the periphery of the forming part, and the upper end of the protection ring is not lower than the highest point of the forming part when the die is opened; the lower end of the upper die is also provided with an avoiding groove, and the avoiding groove is sleeved on the protective ring during die assembly. This application has the probability that reduces the work piece and collide with shaping portion, is favorable to improving the life of shaping portion to guarantee the shaping quality's of mould effect.

Description

Cold extrusion die

Technical Field

The application relates to the field of dies, in particular to a cold extrusion die.

Background

Cold extrusion is a process in which a metal blank is placed in a cold extrusion die cavity (typically a female die), and pressure is applied to the blank at room temperature by a male die on a press machine to plastically deform the metal blank to produce a part.

Referring to fig. 1, a bevel gear 1 includes a base 11 and a tooth portion 12, where the base 11 has a large end 111 and a small end 112 at both axial ends thereof, and the tooth portion 12 is provided on the circumferential side of the base 11.

Referring to fig. 1 and 2, when the bevel gear 1 is processed by cold extrusion, the mold comprises an upper mold 2 and a lower mold 3, an upper cavity 21 is arranged at the lower end of the upper mold 2, the upper cavity 21 is used for forming a large end 111, a lower cavity 31 is arranged at the upper end surface of the lower mold 3, the lower cavity 31 is used for forming a small end 112, a forming portion 32 used for forming a tooth portion 12 is further arranged on the side wall of the lower cavity 31, and the upper end of the forming portion 32 is attached to the side wall of the upper cavity 21.

However, the upper end of the forming portion 32 protrudes out of the upper end surface of the lower die 3, so that when a worker loads materials, the lifting height of a workpiece is usually reduced as much as possible for labor saving, the workpiece may collide with the upper end of the forming portion 32, and the forming portion 32 is damaged, and the service life of the forming portion 32 is affected.

SUMMERY OF THE UTILITY MODEL

In order to improve the life of the forming part, the application provides a cold extrusion die.

The application provides a cold extrusion die adopts following technical scheme:

the utility model provides a cold extrusion die, includes mould and lower mould, and the lower extreme of going up the mould is equipped with the die cavity, and the up end of lower mould is equipped with down the die cavity, still is equipped with shaping portion, its characterized in that on the lateral wall of lower die cavity: the protective ring is sleeved on the periphery of the forming part, and the upper end of the protective ring is not lower than the highest point of the forming part when the mold is opened; the lower end of the upper die is also provided with an avoiding groove, and the avoiding groove is sleeved on the protective ring during die assembly.

By adopting the technical scheme, when a worker loads materials, the worker needs to lift the workpiece to ensure that the workpiece crosses the protective ring, so that the lower end of the workpiece is higher than the upper end of the forming part, the probability that the workpiece collides with the forming part is further reduced, the service life of the forming part is favorably prolonged, and the forming quality of a die is ensured;

when the mold is closed, the protective ring is embedded into the avoiding groove, the protective ring does not need to be taken down before the mold is closed, and the bevel gears can be processed conveniently by cold extrusion in batches.

Preferably, the inner periphery of the guard ring is far away from the forming part, and the side wall of the avoidance groove is attached to the guard ring.

By adopting the technical scheme, the structural strength of the periphery of the cavity at the upper die is ensured, the deformation of the cavity is avoided, and the molding quality of the die is ensured.

Preferably, the upper end of the lower die is provided with an embedded groove, and the protection ring is embedded in the embedded groove.

By adopting the technical scheme, the embedded groove is formed in the lower die, the depth of the avoiding groove is controlled, the structural strength of the upper die is favorably ensured, and the molding quality of the die is further ensured;

and when the die is closed, the upper end and the lower end of the protective ring are respectively embedded into the upper die and the lower die, so that the upper die and the lower die can be positioned in an auxiliary manner.

Preferably, the inner periphery of guard ring is equipped with the locating piece along circumference interval, the terminal surface of locating piece orientation guard ring axis is used for the butt caulking groove and dodges the lateral wall in groove.

Through adopting above-mentioned technical scheme, the terminal surface of locating piece adopts the finish machining in order to guarantee positioning accuracy, and it only needs the terminal surface of processing the locating piece, reduces the finish machining area.

Preferably, the protective ring comprises a base ring and a rubber ring, and the rubber ring covers the periphery of the base ring and the upper end of the base ring.

Through adopting above-mentioned technical scheme, the workman when the material loading, the work piece probably collides with to the guard ring, utilizes the rubber ring absorbed energy, avoids damaging the work piece, simultaneously, avoids receiving of guard ring to collide with and plastic deformation, guarantees that the guard ring can inlay and establish to dodging the inslot.

Preferably, the lower extreme of base ring inlays and locates in the caulking groove, the caulking groove upwards stretches out to the upper end of base ring, just the upper end of base ring is used for inlaying and establishes to dodging in the groove.

Through adopting above-mentioned technical scheme, utilize the rigidity butt between base ring and caulking groove, the dodge groove, realize the assistance-localization real-time.

Preferably, the periphery interval of base ring is equipped with the draw-in groove, be equipped with the fixture block on the rubber ring, the fixture block is used for inlaying and establishes to the draw-in groove in.

Through adopting above-mentioned technical scheme, when cold extrusion bevel gear in batches, the rubber ring is the compressive deformation repeatedly, the reconversion, and it has certain life, and at this moment, change the rubber ring, guarantee the normal use of rubber ring.

Preferably, the upper end and the lower end of the inner periphery of the base ring are both provided with guide surfaces.

By adopting the technical scheme, when the die is closed, the guide surface is arranged, so that the groove and the base ring are convenient to embed, and the auxiliary positioning is realized;

meanwhile, the symmetrically arranged base rings and the guide surfaces are convenient for replacing the rubber rings, and the direction of the base rings does not need to be distinguished.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the probability that the workpiece collides with the forming part is reduced, the service life of the forming part is prolonged, and the forming quality of the die is ensured;

2. when workers load materials, workpieces can collide with the protection ring, the rubber ring is used for absorbing energy, the workpieces are prevented from being damaged, meanwhile, the protection ring is prevented from being collided and plastically deformed, and the protection ring can be embedded into the avoidance groove;

3. when the die is closed, the upper end and the lower end of the protective ring are respectively embedded into the upper die and the lower die, so that the upper die and the lower die can be positioned in an auxiliary manner.

Drawings

Fig. 1 is a schematic view of a bevel gear.

Fig. 2 is a schematic structural view of a related art cold extrusion die.

Fig. 3 is a schematic view of the overall structure of the present application.

Fig. 4 is an enlarged view at a in fig. 3.

Fig. 5 is an exploded view of the guard ring structure.

Description of reference numerals: 1. a bevel gear; 11. a base; 111. a large end; 112. a small end; 12. a tooth portion; 2. an upper die; 21. an upper cavity; 22. an avoidance groove; 3. a lower die; 31. a lower cavity; 32. a molding section; 33. caulking grooves; 4. a guard ring; 41. a base ring; 411. a card slot; 412. a guide surface; 42. a rubber ring; 421. a clamping block; 43. and (5) positioning the blocks.

Detailed Description

The present application is described in further detail below with reference to figures 1-5.

Referring to fig. 1, the bevel gear 1 includes a base 11 and a tooth portion 12, the base 11 has a large end 111 and a small end 112 at both axial ends thereof, and the tooth portion 12 is provided on the circumferential side of the base 11.

The embodiment of the application discloses a cold extrusion die.

Referring to fig. 3, the cold extrusion die is used for producing the bevel gear 1 by cold extrusion, and comprises an upper die 2 and a lower die 3, wherein the lower end of the upper die 2 is provided with an upper cavity 21, the upper end surface of the lower die 3 is provided with a lower cavity 31, and the side wall of the lower cavity 31 is further provided with a forming part 32.

During production, a worker places a workpiece in the lower cavity 31, then the upper die 2 is pressed downwards and matched, the upper cavity 21 realizes the molding of the large end 111, the lower cavity 31 realizes the molding of the small end 112, the molding part 32 realizes the molding of the gear, and further the cold extrusion molding of the bevel gear 1 is realized.

Referring to fig. 3 and 4, the upper end of lower mould 3 still is equipped with caulking groove 33, and caulking groove 33 is whole to be the annular, and lower die cavity 31 and shaping portion 32 all are located this annular inside, and simultaneously, the embedded guard ring 4 that is equipped with of caulking groove 33, the upper end of guard ring 4 upwards stretches out caulking groove 33, and the upper end of guard ring 4 is higher than the peak of shaping portion 32, and the lower extreme of going up mould 2 still is equipped with dodges groove 22, during the compound die, dodge groove 22 and cup joint to on the guard ring 4.

When the workman was in the material loading, need lift the work piece in order to guarantee that the work piece crosses guard ring 4, make the lower extreme of work piece be higher than the upper end of shaping portion 32, and then reduce the probability that the work piece collided with shaping portion 32.

Referring to fig. 4 and 5, the protection ring 4 includes base ring 41 and rubber ring 42, and rubber ring 42 covers the periphery of base ring 41 and the upper end of base ring 41, and the periphery interval of base ring 41 is equipped with draw-in groove 411, is equipped with fixture block 421 on the rubber ring 42, and fixture block 421 are used for inlaying and establish to draw-in groove 411 in, and the lateral wall of the periphery laminating caulking groove 33 of rubber ring 42, and when protection ring 4 inlayed and established to caulking groove 33 in, avoid fixture block 421 to break away from draw-in groove 411.

When workers load materials, the workpieces can collide with the protective ring 4, and the rubber ring 42 is used for absorbing energy, so that the workpieces are prevented from being damaged.

The interior circumference of base ring 41 is equipped with locating piece 43 along circumference interval, base ring 41 is interior and be located axial tip and be equipped with spigot surface 412, and spigot surface 412 extends to the terminal surface of locating piece 43, the upper end of locating piece 43 is used for inlaying and establishes to dodging in the groove 22, and the terminal surface that locating piece 43 deviates from base ring 41 is used for butt caulking groove 33, dodge the lateral wall of groove 22, there is the clearance between the interior circumference of base ring 41 and caulking groove 33, dodge the lateral wall of groove 22, during the compound die, utilize base ring 41, locating piece 43 realizes going up mould 2, the auxiliary positioning between the lower mould 3.

The clamping groove 411 is located in the axial middle of the base ring 41, and the upper and lower ends of the inner periphery of the base ring 41 are both provided with guide surfaces 412, so that the base ring 41 is axially symmetrical, and the direction of the base ring 41 does not need to be distinguished when the base ring is installed.

During the installation, convenient the base ring 41 of establishing to caulking groove 33 is inlayed to one guide surface 412 on the base ring 41 realization, and the bolt runs through base ring 41 and fixed connection to lower mould 3, and during the compound die, another guide surface 412 on the base ring 41 is convenient for cup joint each other of base ring 41 and dodge groove 22 and is inlayed.

The implementation principle of the cold extrusion die in the embodiment of the application is as follows: when a worker loads materials, the workpiece needs to be lifted to ensure that the workpiece crosses the protective ring 4, so that the lower end of the workpiece is higher than the upper end of the forming part 32, and the probability that the workpiece collides with the forming part 32 is further reduced;

during feeding, workers usually reduce the lifting height of the workpiece as much as possible for labor saving, the workpiece may collide with the protective ring 4, and at the moment, the rubber ring 42 is used for absorbing energy, so that the workpiece is prevented from being damaged;

meanwhile, in the process of die assembly, the base ring 41 and the positioning block 43 are used for realizing the auxiliary positioning between the upper die 2 and the lower die 3.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a cold extrusion die, includes mould (2) and lower mould (3), and the lower extreme of going up mould (2) is equipped with die cavity (21), and the up end of lower mould (3) is equipped with down die cavity (31), still is equipped with shaping portion (32), its characterized in that on the lateral wall of lower die cavity (31): the mould is characterized by further comprising a protective ring (4), wherein the protective ring (4) is sleeved on the periphery of the forming part (32), and when the mould is opened, the upper end of the protective ring (4) is not lower than the highest point of the forming part (32); the lower end of the upper die (2) is also provided with an avoiding groove (22), and during die assembly, the avoiding groove (22) is sleeved on the protective ring (4).

2. A cold extrusion die according to claim 1, wherein: the inner periphery of the protective ring (4) is far away from the forming part (32), and the side wall of the avoiding groove (22) is attached to the protective ring (4).

3. A cold extrusion die according to claim 1, wherein: the upper end of lower mould (3) is equipped with caulking groove (33), guard ring (4) inlay is located in caulking groove (33).

4. A cold extrusion die according to claim 3, wherein: the interior week of guard ring (4) is equipped with locating piece (43) along circumference interval, locating piece (43) are used for butt caulking groove (33) and dodge the lateral wall of groove (22) towards the terminal surface of guard ring (4) axis.

5. A cold extrusion die according to claim 1, wherein: the protective ring (4) comprises a base ring (41) and a rubber ring (42), and the rubber ring (42) covers the periphery of the base ring (41) and the upper end of the base ring (41).

6. A cold extrusion die according to claim 5, wherein: the lower extreme of base ring (41) inlays and locates in caulking groove (33), caulking groove (33) upwards stretches out in the upper end of base ring (41), just the upper end of base ring (41) is used for inlaying and establishes to dodging in groove (22).

7. A cold extrusion die according to claim 6, wherein: the periphery interval of base ring (41) is equipped with draw-in groove (411), be equipped with fixture block (421) on rubber ring (42), fixture block (421) are used for inlaying and establish to draw-in groove (411) in.

8. A cold extrusion die according to claim 7, wherein: the upper end and the lower end of the inner periphery of the base ring (41) are provided with guide surfaces (412).