CN214557384U

CN214557384U - Many stamping dies of carbide mushroom head shape dysmorphism piece pressed compact

Info

Publication number: CN214557384U
Application number: CN202120467460.0U
Authority: CN
Inventors: 钟健; 雷本禄; 陈建; 侯荣
Original assignee: Zigong Zhongxing Wear Resistant New Materials Co ltd
Current assignee: Zigong Zhongxing Wear Resistant New Materials Co ltd
Priority date: 2021-03-04
Filing date: 2021-03-04
Publication date: 2021-11-02
Anticipated expiration: 2031-03-04

Abstract

The utility model discloses a hard alloy mushroom head-shaped special-shaped piece pressed compact multi-die stamping die, which comprises a female die which is internally communicated, wherein one end of the female die is provided with an upper punch which reciprocates along the length direction of the female die, and the female die is also detachably connected with an upper stopper which is used for limiting the displacement length of the upper punch; one end of the female die, which is far away from the upper punch, is provided with a lower punch assembly which has the same movement direction as the upper punch, and the female die is also detachably connected with a lower stopper for limiting the displacement length of the lower punch assembly; the lower punch assembly comprises a lower punch, a first core rod and a second core rod, the lower punch is matched and fixed with the lower limiter, a through hole for the second core rod to penetrate through is formed in the first core rod, and the first core rod is matched and fixed with the lower punch. The structure of drift about adopting, both sides suppress simultaneously to the lower extreme still adopts first core bar and the different structure of second core bar press forming respectively, can reduce the crackle of product, has overcome the problem that the product is very easily stratified and density is uneven in the pressing process simultaneously.

Description

Many stamping dies of carbide mushroom head shape dysmorphism piece pressed compact

Technical Field

The utility model relates to a powder metallurgy pressed compact shaping field especially relates to a many stamping die of carbide mushroom head shape dysmorphism piece pressed compact.

Background

Powder metallurgy is a process technology for manufacturing metal materials, composite materials and various products by preparing metal powder or using the metal powder as a raw material and forming and sintering the metal powder. The powder metallurgy method has similar places to the production of ceramics, and belongs to the powder sintering technology. In the stage of the compression molding of the powder metallurgy part, the compression molding is required to be carried out bidirectionally, symmetrically and simultaneously, but in practice, the complete symmetric compression is difficult to realize due to the special-shaped structure of the part. During compression molding, the geometry of the parts, mold design, mold assembly, etc. all lead to problems such as cracking, delamination, and uneven density in the molded green compact. Particularly, for the existing mushroom head-shaped profile, the yield of the pressing process is low, the production cost is increased, and the quality of the product is reduced. Therefore, there is a need for a multi-die stamping die for producing a hard alloy mushroom head-shaped special-shaped piece green compact with high yield.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that, to the problem that above-mentioned exists, provide a many stamping die of carbide mushroom head shape dysmorphism piece pressed compact, the structure of drift about adopting, both sides suppress simultaneously to the lower extreme still adopts first core bar and the different structure of second core bar suppression respectively, can reduce the crackle of product, has overcome the product simultaneously and has very easily stratified and the uneven problem of density in the suppression process.

The utility model adopts the technical scheme as follows: a hard alloy mushroom head-shaped special-shaped piece pressed compact multi-die stamping die comprises a female die with a through inner part, wherein an upper punch reciprocating along the length direction of the female die is arranged at one end of the female die, and the female die is also detachably connected with an upper stopper used for limiting the displacement length of the upper punch; one end of the female die, which is far away from the upper punch, is provided with a lower punch assembly which has the same movement direction as the upper punch, and the female die is also detachably connected with a lower stopper for limiting the displacement length of the lower punch assembly; the lower punch assembly comprises a lower punch, a first core rod and a second core rod, the lower punch is matched and fixed with the lower limiting stopper, a through hole for the second core rod to penetrate through is formed in the first core rod, and the first core rod is matched and fixed with the lower punch. The structure of drift about adopting, both sides suppress simultaneously to the lower extreme still adopts first core bar and the different structure of second core bar press forming respectively, can reduce the crackle of product, has overcome the problem that the product is very easily stratified and density is uneven in the pressing process simultaneously.

Preferably, the length of the second core rod is greater than that of the first core rod, and the length of the first core rod is greater than that of the lower punch. The punched parts can be punched with different depths.

Preferably, a first pressing plane is arranged on one side, close to the lower punch assembly, of the upper punch, a second pressing plane is arranged on one side, close to the upper punch, of the lower punch, and the minimum distance between the first pressing plane and the second pressing plane is equal to the height of the part to be machined.

Preferably, one end of the first core rod close to the upper punch is provided with a third pressing plane, and the third pressing plane is parallel to the second pressing plane.

Preferably, the outer side wall of the first core rod is parallel to the inner side wall of the female die.

Preferably, one end of the second core bar close to the upper punch is provided with a stamping part, and the stamping part is of a conical structure.

Preferably, the upper stopper is provided with a limiting ring, the upper punch is provided with a limiting convex ring, and the inner diameter of the limiting ring is smaller than the outer diameter of the limiting convex ring.

Preferably, the upper punch, the lower punch, the first core bar, the second core bar and the die are all of a symmetrical rotating body structure.

Compared with the prior art, the beneficial effects of adopting the technical scheme are as follows: the utility model discloses a many stamping dies of carbide mushroom head shape dysmorphism pressed compact, including the bed die that link up inside, the one end of bed die is provided with along the reciprocating motion of bed die length direction, still can dismantle on the bed die and be connected with the stopper that is used for restricting the displacement length of bed die; one end of the female die, which is far away from the upper punch, is provided with a lower punch assembly which has the same movement direction as the upper punch, and the female die is also detachably connected with a lower stopper for limiting the displacement length of the lower punch assembly; the lower punch assembly comprises a lower punch, a first core rod and a second core rod, the lower punch is matched and fixed with the lower limiting stopper, a through hole for the second core rod to penetrate through is formed in the first core rod, and the first core rod is matched and fixed with the lower punch. The structure of drift about adopting, both sides suppress simultaneously to the lower extreme still adopts first core bar and the different structure of second core bar press forming respectively, can reduce the crackle of product, has overcome the problem that the product is very easily stratified and density is uneven in the pressing process simultaneously.

Drawings

FIG. 1 is a main structural view of the present invention;

fig. 2 is an enlarged schematic view of a part a of fig. 1 according to the present invention;

fig. 3 is a schematic view of the processed product of the present invention.

Description of the symbols of the main elements: 1. a female die; 2. an upper stopper; 3. an upper punch; 4. producing a product; 5. a lower punch; 6. a second core bar; 7. a first core bar; 8. a lower stopper; 21. a limiting ring; 31. a limit convex ring; 32. a first pressing plane; 51. a second pressing plane; 61. a punching part; 71. and a third pressing plane.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings. In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Example 1: referring to fig. 1 to 3, the multi-die stamping die for hard alloy mushroom head-shaped special-shaped blank compacts of the present embodiment includes a female die 1 having a through interior, an upper punch 3 reciprocating along a length direction of the female die 1 is disposed at one end of the female die 1, and the female die 1 is detachably connected with an upper stopper 2 for limiting a displacement length of the upper punch 3; one end of the female die 1, which is far away from the upper punch 3, is provided with a lower punch assembly which has the same movement direction as the upper punch 3, and the female die 1 can be detachably connected with a lower stopper 8 for limiting the displacement length of the lower punch assembly; the lower punch assembly comprises a lower punch 5, a first core rod 7 and a second core rod 6, the lower punch 5 is matched and fixed with a lower limiter 8, a through hole for the second core rod 6 to penetrate through is formed in the first core rod 7, and the first core rod 7 is matched and fixed with the lower punch 5. The structure of drift 5 about adopting, both sides suppress simultaneously to the lower extreme still adopts first core bar 7 and second core bar 6 different structures of press forming respectively, can reduce the crackle of product 4, has overcome product 4 simultaneously and has very easily stratified and the uneven problem of density in the pressing process. Due to the different compaction speeds caused by the relative movement of the powder columns formed by partial compression, the first core rod 7 and the second core rod 6 are adopted for multi-die forming, so that the density change of the product 4 can be reduced, and the generation of cracks can be reduced.

Example 2: the second core bar 6 of the present embodiment has a length greater than that of the first core bar 7, and the first core bar 7 has a length greater than that of the lower punch 5. The punched parts can be punched with different depths. The side of the upper punch 3 close to the lower punch assembly of the present embodiment is provided with a first pressing plane 32, the side of the lower punch 5 close to the upper punch 3 is provided with a second pressing plane 51, and the minimum distance between the first pressing plane 32 and the second pressing plane 51 is equal to the height of the part to be processed. The end of the first core rod 7 near the upper punch 3 of the present embodiment is provided with a third pressing plane 71, and the third pressing plane 71 is parallel to the second pressing plane 51. The outer side wall of the first core rod 7 of this embodiment is parallel to the inner side wall of the female mould 1. In the present embodiment, a punching portion 61 is provided at one end of the second core bar 6 close to the upper punch 3, and the punching portion 61 has a conical structure. The upper stopper 2 of this embodiment is provided with a stopper ring 21, the upper punch 3 is provided with a stopper convex ring 31, and the inner diameter of the stopper ring 21 is smaller than the outer diameter of the stopper convex ring 31. The upper punch 3, the lower punch 5, the first core bar 7, the second core bar 6 and the die 1 of the present embodiment are all of a symmetrical rotary structure. In the powder metallurgy field, any of mould design, mould manufacturing and mould operating mode is improper, all can incur the crackle production in the press forming process, because the elastic strain and the bending out of control of various mould parts all can lead to the crackle to form, consequently, the rigidity of design mould must be as high as possible, and the carbide mushroom head shape dysmorphism spare pressed compact multi-stamping die of this embodiment all adopts high-speed steel to make.

The above description is only for the preferred embodiment of the present invention and should not be taken as limiting the invention, and any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. The multi-die stamping die for the hard alloy mushroom head-shaped special-shaped piece pressed compact is characterized by comprising a female die with a through inner part, wherein one end of the female die is provided with an upper punch reciprocating along the length direction of the female die, and the female die is also detachably connected with an upper stopper for limiting the displacement length of the upper punch; one end of the female die, which is far away from the upper punch, is provided with a lower punch assembly which has the same movement direction as the upper punch, and the female die is also detachably connected with a lower stopper for limiting the displacement length of the lower punch assembly; the lower punch assembly comprises a lower punch, a first core rod and a second core rod, the lower punch is matched and fixed with the lower limiting stopper, a through hole for the second core rod to penetrate through is formed in the first core rod, and the first core rod is matched and fixed with the lower punch.

2. A cemented carbide mushroom head shape profile compact multi-die press according to claim 1, characterized in that the length of the second core rod is larger than the length of the first core rod, which is larger than the length of the lower punch.

3. A hard alloy mushroom head shape profile compact multi-die press as claimed in claim 1, wherein a side of the upper punch close to the lower punch assembly is provided with a first pressing plane, a side of the lower punch close to the upper punch is provided with a second pressing plane, and the minimum distance between the first and second pressing planes is equal to the height of the part to be processed.

4. A hard metal mushroom head shape profile compact multi-die mold as claimed in claim 3, wherein an end of the first core rod near the upper punch is provided with a third pressing plane, the third pressing plane being parallel to the second pressing plane.

5. A cemented carbide mushroom head shaped piece compact multi-die press as claimed in claim 1, wherein the outer side wall of the first core rod is parallel to the inner side wall of the die.

6. A hard alloy mushroom head shaped piece compact multi-die press according to claim 1, wherein one end of the second core rod near the upper punch is provided with a punch part, and the punch part is of a cone type structure.

7. A multi-die tool for hard alloy mushroom head shaped piece compact presses according to claim 1, characterized in that the upper stopper is provided with a stop collar, the upper punch is provided with a stop collar, the inner diameter of the stop collar is smaller than the outer diameter of the stop collar.

8. A multi-die tool for a cemented carbide mushroom head shaped piece compact multi-die according to claim 1, characterized in that the upper punch, the lower punch, the first core rod, the second core rod and the die are all of a symmetrical rotator structure.