CN215543795U

CN215543795U - Valve bridge cold extrusion processing die with pressure reducing column

Info

Publication number: CN215543795U
Application number: CN202023156362.XU
Authority: CN
Inventors: 张清林; 罗乐; 司大强
Original assignee: Jiangsu Xingforging Intelligent Equipment Technology Co ltd
Current assignee: Jiangsu Xingforging Intelligent Equipment Technology Co ltd
Priority date: 2020-12-24
Filing date: 2020-12-24
Publication date: 2022-01-18
Anticipated expiration: 2030-12-24

Abstract

The utility model provides a valve bridge cold extrusion processing die with a decompression column, which comprises a stamping die (1), a main die (2) and a frame (3), wherein the stamping die (1) is movably arranged above the inside of the frame (3), the main die (2) is arranged below the inside of the frame (3), the stamping die (1) has the freedom degree of moving towards the main die (2), the main die (2) and the stamping die (1) are both of insert structures, decompression holes are formed in two sides of the upper surface of the main die (2), and the stamping die (1) is provided with a column structure arranged corresponding to the positions of the decompression holes. Compared with the traditional machining methods such as cutting, casting and the like, the utility model greatly improves the production efficiency, ensures the stability of the size and the structure of the product, better reduces the stress of the die and prolongs the service life of the die compared with the cold extrusion machining method without a pressure reducing column.

Description

Valve bridge cold extrusion processing die with pressure reducing column

Technical Field

The utility model relates to the field of cold extrusion, in particular to a valve bridge cold extrusion processing die with a decompression column.

Background

With the continuous development of the automobile industry, the upgrade of national emission and the continuous improvement of engine power, the air input and the discharge capacity of an engine need to be increased, the number of valves in one row cannot meet the requirement of the engine, and a multi-valve engine is produced and the requirement on a valve bridge is increased day by day. The valve bridge is used as a connecting piece, the valve bridge is mainly made of low-carbon alloy steel or medium-carbon alloy steel, the shape is complex, the requirements on the structure and the performance are high, the cost is high by adopting a traditional machining method, and cold extrusion is a good machining mode.

Cold extrusion is a technological process for extruding hollow parts or solid parts with a section smaller than that of a blank through a gap between a male die and a female die or a female die outlet by putting a cold metal blank into a die cavity arranged on a press machine under the condition of room temperature by utilizing the principle of plastic deformation of a metal material, forcing the metal blank to generate plastic flow under the action of strong pressure and certain speed, and obtaining an extrusion part with required shape and size and higher comprehensive mechanical properties. Cold extrusion is one of the machining processes of parts with little cutting or without cutting, and is an advanced machining method in metal plastic machining. In recent years, the development of cold extrusion technology is mostly reflected in the development of products with higher added values, the production and processing cost is continuously reduced, meanwhile, the penetration is continuously expanded to the fields of metal cutting processing, casting, powder metallurgy and the like, and meanwhile, the situation that a composite process is formed by combining the processes is frequently occurred.

In the existing valve bridge die, the material below the stamping die is sealed, and the flow of the material is blocked compared with the surrounding material

The existing cold extrusion valve bridge processing die is needed, so that materials below the center of a stamping die can be shunted, and the highest peak value of stress is reduced.

Disclosure of Invention

The utility model provides a valve bridge cold extrusion processing die with a pressure reducing column, which solves the problems that in the prior valve bridge die, a material below a stamping die is sealed and the flow of the material is blocked compared with the surrounding material.

The utility model provides a valve bridge cold extrusion processing die with a decompression column, which comprises a stamping die, a main die and a frame, wherein the stamping die is movably arranged above the inside of the frame, the main die is arranged below the inside of the frame, the stamping die has freedom degree of movement towards the main die, the main die and the stamping die are both of insert block structures, decompression holes are arranged on two sides of the upper surface of the main die, and the stamping die is provided with a stand column structure arranged corresponding to the positions of the decompression holes.

The cold extrusion of the valve bridge is to reduce the stress, improve the service life of the die and increase the compression column in the process.

The utility model relates to a valve bridge cold extrusion processing die with a decompression column, which is a preferable mode.

The utility model relates to a valve bridge cold extrusion processing die with a pressure reducing column, which is a preferable mode, a main die body comprises a first main die insert, a second main die insert, a third main die insert, a fourth main die insert, a main die shell and a main die core, wherein the main die core and the main die shell are both of a structure with a through hole in the middle, the main die core is embedded in the through hole of the main die shell, the outer diameter of the main die core is equal to the inner diameter of the main die shell, the third main die insert and the fourth main die insert are arranged on the inner diameter surface of the through hole of the main die core, the first main die insert and the second main die insert are arranged between the third main die insert and the fourth main die insert, a pressure reducing hole is arranged between the first main die insert and the third main die insert and between the second main die insert and the fourth main die insert, the upper surface and the lower surface of the first main die insert, the upper surface and the lower surface of the second main die insert, the upper surface of the third main die insert and the fourth main die insert are all non-parallel, the upper surfaces of the first main die insert and the third main die insert are coplanar, and the upper surfaces of the second main die insert and the fourth main die insert are coplanar.

As an optimal mode, the first main die insert and the second main die insert are the same in shape and size, the third main die insert and the fourth main die insert are the same in shape and size, and the lowest point of the upper surface of the third main die insert is higher than that of the upper surface of the first main die insert.

As a preferred mode, the upper end of a jacking mechanism is arranged between the third main die insert and the fourth main die insert.

In order to facilitate the die machining and reduce the stress concentration of the transition region, the main die adopts an insert form.

As a preferred mode, the main die jacking mechanism comprises a jacking rod, a main die jacking rod, a jacking rod cushion block, an installation fixing ring and a main die cushion block, wherein the installation fixing ring is arranged on the lower surface inside the frame, the installation fixing ring is of an annular structure, the main die cushion block is of a cylindrical structure with holes, the main die cushion block is arranged in the installation fixing ring, the jacking rod cushion block and the main die jacking rod are sequentially arranged in holes of the main die cushion block in an end-to-end connection mode, and the upper end of the jacking rod penetrates through the upper surface of the main die cushion block.

The utility model relates to a cold extrusion processing die for a valve bridge with a decompression column, which is a preferred mode, wherein a stamping die comprises a first stamping die ejector rod, a second stamping die ejector rod, a stamping die cushion block, a middle ejector rod, a stamping die mounting seat, a stamping die mounting block, a first stamping die, a second stamping die and a third stamping die, the stamping die cushion block is of a columnar structure with a stepped hole, the stepped hole is a two-stage stepped hole, the diameter of the upper stepped hole is larger than that of the lower stepped hole, the first stamping die ejector rod, the middle ejector rod and the second stamping die ejector rod are coaxially arranged from top to bottom in sequence, the second stamping die ejector rod is a stepped shaft, a large-diameter stepped shaft section of the second stamping die ejector rod is connected with the middle ejector rod, a small-diameter stepped shaft section of the second stamping die ejector rod penetrates through the stepped hole to be connected with the top end of the stamping die mounting seat, the diameter of the second stamping die ejector rod is in transitional fit with the diameter of the stepped hole, the stamping die mounting seat is arranged below the stamping die cushion block, the stamping die mounting block is arranged above the stamping die mounting seat, the die mounting seat is provided with the coplane through-hole of three axis, the die mounting block is provided with the through-hole, the through-hole and the die mounting seat middle part through-hole intercommunication of die mounting block, the second die sets up in die mounting block middle part through-hole, second die bottom surface is the arc bottom surface, first die and third die setting are in die mounting block both sides portion through-hole, first die and third die top are installed at die mounting block lower surface, first die and third die are the columnar structure, first die and third die lower surface are less than die mounting seat lower surface.

And blind holes at two ends of the backward extrusion are used for preventing stress concentration in a transition area of the head part of the stamping die, and the die is designed into the stamping die with an inserted mandrel.

As a preferred mode, the main die cushion block hole is a stepped hole, the ejector rod is a stepped shaft, the diameter of the stepped hole at the lower end of the main die cushion block is larger than that of the stepped hole at the upper end of the main die cushion block, the diameter of the ejector rod is matched with that of the stepped hole of the main die cushion block, and the axial length of the large-diameter stepped shaft of the ejector rod is smaller than that of the large-diameter stepped hole of the main die cushion block.

Compared with the traditional machining methods such as cutting, casting and the like, the die greatly improves the production efficiency, ensures the stability of the size and the structure of a product, better reduces the die stress and prolongs the die service life compared with a cold extrusion machining method without a pressure reducing column. The material below the center of the male die is divided, the stress of the cold extrusion male die and the female die insert is reduced, the service life of the die is prolonged, the times of shutdown die change are reduced, and the economic benefit is increased.

The utility model has the following beneficial effects:

(1) by adopting the cold extrusion processing technology with the decompression column, the material below the center of the stamping die is shunted, the highest peak value of stress is reduced, the service life of the die is prolonged, the times of stopping and changing the die are reduced, the cost of the die is saved, and the production efficiency is improved;

(2) the stamping die and the main die both adopt the insert mode, so that the stress concentration of a transition area is eliminated, the risk of cracking and damage of the die is reduced, and the service life of the die is prolonged.

Drawings

FIG. 1 is a schematic view of a valve bridge cold extrusion mold with a pressure reducing column;

FIG. 2 is a schematic view of a main mold of a valve bridge cold extrusion processing mold with a pressure reducing column;

FIG. 3 is a schematic view of a main mold body of a valve bridge cold extrusion processing mold with a decompression column;

FIG. 4 is a schematic view of a jacking mechanism of a valve bridge cold extrusion processing die with a decompression column;

FIG. 5 is a schematic drawing of a valve bridge cold extrusion die with a pressure reducing column.

Reference numerals:

1. punching a die; 11. a first die ejector pin; 12. a second die ejector rod; 13. punching a cushion block; 14. a middle ejector rod; 15. a die mounting seat; 16. a die mounting block; 17. a first die; 18. a second die; 19. a third die; 2. performing primary molding; 21. a main mold body; 211. a first master die insert; 212. a second master die insert; 213. a third master die insert; 214. a fourth master die insert; 215. a master mold shell; 216. a master mold core; 22. a master mold jacking mechanism; 221. A top rod; 222. a main die ejector rod; 223. a mandril cushion block; 224. mounting a fixed ring; 225. a main die cushion block; 3. and a frame.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Example 1

As shown in fig. 1, a valve bridge cold extrusion processing die with a decompression column comprises a stamping die 1, a main die 2 and a frame 3, wherein the stamping die 1 is movably arranged above the inside of the frame 3, the main die 2 is arranged below the inside of the frame 3, the stamping die 1 has a degree of freedom for moving towards the main die 2, the main die 2 and the stamping die 1 are both of an insert structure, decompression holes are arranged on two sides of the upper surface of the main die 2, and the stamping die 1 is provided with a column structure which is arranged corresponding to the positions of the decompression holes.

As shown in fig. 2, the master die 2 includes a master die body 21 and a master die jacking mechanism 22, the master die body 21 is disposed above the master die jacking mechanism 22, the master die jacking mechanism 22 is disposed on the lower surface inside the frame 3, and the master die jacking mechanism 22 penetrates through the center of the master die 2 and is used for ejecting a product extruded by the die 1 and the master die 2.

As shown in fig. 3, the main mold body 21 includes a first main mold insert 211, a second main mold insert 212, a third main mold insert 213, a fourth main mold insert 214, a main mold shell 215, and a main mold core 216, both of the main mold core 216 and the main mold shell 215 are structures with through holes in the middle, the main mold core 216 is nested in the through hole of the main mold shell 215, the outer diameter of the main mold core 216 is equal to the inner diameter of the main mold shell 215, the third main mold insert 213 and the fourth main mold insert 214 are disposed on the inner diameter surface of the through hole of the main mold core 216, the first main mold insert 211 and the second main mold insert 212 are disposed between the third main mold core 213 and the fourth main mold insert 214, relief holes are disposed between the first main mold insert 213 and the third main mold insert 213, and between the second main mold insert 212 and the fourth main mold insert 214, both of the upper and lower surfaces of the first main mold insert 211, the upper and lower surfaces of the second main mold insert 212, the upper and lower surfaces of the third main mold insert 211 and the fourth main mold insert 214 are non-parallel, the upper surfaces of the first and third master mold inserts 211 and 213 are coplanar, and the upper surfaces of the second and fourth master mold inserts 212 and 214 are coplanar.

The first main mold insert 211 and the second main mold insert 212 have the same shape and size, the third main mold insert 213 and the fourth main mold insert 214 have the same shape and size, and the lowest point of the upper surface of the third main mold insert 213 is higher than the highest point of the upper surface of the first main mold insert 211.

The upper end of the jacking mechanism is arranged between the third main die insert 213 and the fourth main die insert 214.

As shown in fig. 4, the main mold jacking mechanism 22 includes a jacking rod 221, a main mold jacking rod 222, a jacking rod cushion block 223, a mounting fixing ring 224 and a main mold cushion block 225, the mounting fixing ring 224 is disposed on the lower surface inside the rack, the mounting fixing ring 224 is of an annular structure, the main mold cushion block 225 is of a columnar structure with a hole, the main mold cushion block 225 is disposed in the mounting fixing ring 224, the jacking rod 221, the jacking rod cushion block 223 and the main mold jacking rod 222 are sequentially connected end to end and disposed in the hole of the main mold cushion block 225, and the upper end of the jacking rod 221 penetrates through the upper surface of the main mold cushion block 225.

As shown in fig. 5, the die 1 includes a first die ejector rod 11, a second die ejector rod 12, a die cushion block 13, a middle ejector rod 14, a die mounting seat 15, a die mounting block 16, a first die 17, a second die 18 and a third die 19, the die cushion block 13 is a columnar structure with stepped holes, the stepped holes are two-stage stepped holes, the diameter of the upper stepped hole is larger than that of the lower stepped hole, the first die ejector rod 11, the middle ejector rod 14 and the second die ejector rod 12 are coaxially arranged from top to bottom in sequence, the second die ejector rod 12 is a stepped shaft, the large-diameter stepped shaft section of the second die ejector rod 12 is connected with the middle ejector rod 14, the small-diameter stepped shaft section of the second die ejector rod 12 passes through the stepped hole to be connected with the top end of the die mounting seat 15, the diameter of the second die ejector rod 12 is in transition fit with the diameter of the stepped hole, the die mounting seat 15 is arranged below the die cushion block 13, the die mounting block 16 is arranged above the die mounting seat 15, the die mounting base 15 is provided with three-axis coplanar through holes, the die mounting block 16 is provided with through holes, the through holes of the die mounting block 16 are communicated with the through hole in the middle of the die mounting base 15, the second die 18 is arranged in the through hole in the middle of the die mounting block 16, the bottom surface of the second die 18 is an arc-shaped bottom surface, the first die 17 and the third die 19 are arranged in the through holes in two side parts of the die mounting block 16, the top ends of the first die 17 and the third die 19 are arranged on the lower surface of the die mounting block 16, the first die 17 and the third die 19 are of columnar structures, and the lower surfaces of the first die 17 and the third die 19 are lower than the lower surface of the die mounting base 15.

The hole of the main die cushion block 225 is a stepped hole, the mandril 221 is a stepped shaft, the diameter of the stepped hole at the lower end of the main die cushion block 225 is larger than that of the stepped hole at the upper end of the main die cushion block 225, the diameter of the mandril 221 is matched with that of the stepped hole of the main die cushion block 225, and the axial length of the large-diameter stepped shaft of the mandril 221 is smaller than that of the large-diameter stepped hole of the main die cushion block 225.

According to the product produced by the utility model, the production process comprises the steps of further extruding inner holes at two ends after bar materials are preformed, cutting the pressure reduction column to a proper size through machining, finally meeting the use requirement, and carrying by using a rack-type mechanical arm in the process.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and equivalent alternatives or modifications according to the technical solution of the present invention and the inventive concept thereof should be covered by the scope of the present invention.

Claims

1. The utility model provides a take valve bridge cold extrusion mold processing of decompression post which characterized in that: including die (1), master die (2) and frame (3), die (1) activity sets up frame (3) inside top, master die (2) set up frame (3) inside below, die (1) have to the degree of freedom that master die (2) removed, master die (2) with die (1) is the structure of inserting, master die (2) upper surface both sides set up the relief vent, die (1) be provided with the stand structure that the relief vent position corresponds the setting.

2. The valve bridge cold extrusion processing die with the decompression column according to claim 1, characterized in that: the main die (2) comprises a main die body (21) and a main die jacking mechanism (22), the main die body (21) is arranged above the main die jacking mechanism (22), the main die jacking mechanism (22) is arranged on the lower surface in the rack (3), and the main die jacking mechanism (22) penetrates through the center of the main die (2) and is used for ejecting the stamping die (1) and a product extruded by the main die (2).

3. The valve bridge cold extrusion processing die with the decompression column according to claim 2, characterized in that: the main die body (21) comprises a first main die insert (211), a second main die insert (212), a third main die insert (213), a fourth main die insert (214), a main die shell (215) and a main die core (216), the main die core (216) and the main die shell (215) are both structures with through holes in the middle, the main die core (216) is embedded in the through hole of the main die shell (215), the outer diameter of the main die core (216) is equal to the inner diameter of the main die shell (215), the third main die insert (213) and the fourth main die insert (214) are arranged on the inner diameter surface of the through hole of the main die core (216), the first main die insert (211) and the second main die insert (212) are arranged between the third main die insert (213) and the fourth main die insert (214), and the space between the first main die insert (211) and the third main die insert (213), The relief hole is formed between the second main die insert (212) and the fourth main die insert (214), the upper and lower surfaces of the first main die insert (211), the upper and lower surfaces of the second main die insert (212), the upper and lower surfaces of the third main die insert (213), and the upper and lower surfaces of the fourth main die insert (214) are all non-parallel, the upper surfaces of the first main die insert (211) and the third main die insert (213) are coplanar, and the upper surfaces of the second main die insert (212) and the fourth main die insert (214) are coplanar.

4. The valve bridge cold extrusion processing die with the decompression column according to claim 3, characterized in that: the first main mold insert (211) and the second main mold insert (212) have the same shape and size, the third main mold insert (213) and the fourth main mold insert (214) have the same shape and size, and the lowest point of the upper surface of the third main mold insert (213) is higher than the highest point of the upper surface of the first main mold insert (211).

5. The valve bridge cold extrusion processing die with the decompression column according to claim 4, wherein the die comprises: and the upper end of the main die jacking mechanism (22) is arranged between the third main die insert (213) and the fourth main die insert (214).

6. The valve bridge cold extrusion processing die with the decompression column according to claim 2, characterized in that: the main die jacking mechanism (22) comprises a jacking rod (221), a main die jacking rod (222), a jacking rod cushion block (223), an installation fixing ring (224) and a main die cushion block (225), the installation fixing ring (224) is arranged on the lower surface inside the rack (3), the installation fixing ring (224) is of an annular structure, the main die cushion block (225) is of a cylindrical structure with holes, the main die cushion block (225) is arranged in the installation fixing ring (224), the jacking rod (221), the jacking rod cushion block (223) and the main die jacking rod (222) are sequentially connected end to end and arranged in the hole of the main die cushion block (225), and the upper end of the jacking rod (221) penetrates through the upper surface of the main die cushion block (225).

7. The valve bridge cold extrusion processing die with the decompression column according to claim 1, characterized in that: the stamping die (1) comprises a first stamping die ejector rod (11), a second stamping die ejector rod (12), a stamping die cushion block (13), a middle ejector rod (14), a stamping die mounting seat (15), a stamping die mounting block (16), a first stamping die (17), a second stamping die (18) and a third stamping die (19), wherein the stamping die cushion block (13) is of a columnar structure with stepped holes, the stepped holes are two-stage stepped holes, the diameter of the upper stepped hole is larger than that of the lower stepped hole, the first stamping die ejector rod (11), the middle ejector rod (14) and the second stamping die ejector rod (12) are sequentially coaxially arranged from top to bottom, the second stamping die ejector rod (12) is a stepped shaft, the large-diameter stepped shaft section of the second stamping die ejector rod (12) is connected with the middle ejector rod (14), the small-diameter stepped shaft section of the second stamping die ejector rod (12) passes through the stepped hole and is connected with the top end of the stamping die mounting seat (15), the second punch die ejector rod (12) is in transition fit with the stepped hole, the punch die mounting seat (15) is arranged below the punch die cushion block (13), the punch die mounting block (16) is arranged above the punch die mounting seat (15), the punch die mounting seat (15) is provided with three axis coplanar through holes, the punch die mounting block (16) is provided with through holes, the through holes of the punch die mounting block (16) are communicated with the through holes in the middle of the punch die mounting seat (15), the second punch die (18) is arranged in the through holes in the middle of the punch die mounting block (16), the bottom surface of the second punch die (18) is arc-shaped, the first punch die (17) and the third punch die (19) are arranged in the through holes in two side parts of the punch die mounting block (16), and the top ends of the first punch die (17) and the third punch die (19) are arranged on the lower surface of the punch die mounting block (16), the first punch die (17) and the third punch die (19) are of columnar structures, and the lower surfaces of the first punch die (17) and the third punch die (19) are lower than the lower surface of the punch die mounting seat (15).

8. The valve bridge cold extrusion processing die with the decompression column according to claim 6, characterized in that: the main die cushion block hole is a stepped hole, the ejector rod (221) is a stepped shaft, the diameter of the stepped hole at the lower end of the main die cushion block (225) is larger than that of the stepped hole at the upper end of the main die cushion block (225), the diameter of the ejector rod (221) is matched with that of the stepped hole of the main die cushion block (225), and the axial length of the large-diameter stepped shaft of the ejector rod (221) is smaller than that of the large-diameter stepped hole of the main die cushion block (225).