CN219169246U

CN219169246U - Assembled extrusion die

Info

Publication number: CN219169246U
Application number: CN202320318082.9U
Authority: CN
Inventors: 杨进洪
Original assignee: Ningbo Qixing Mold Manufacturing Co ltd
Current assignee: Ningbo Qixing Mold Manufacturing Co ltd
Priority date: 2023-02-15
Filing date: 2023-02-15
Publication date: 2023-06-13
Anticipated expiration: 2033-02-15

Abstract

The utility model provides an assembled extrusion die, which comprises a male die and a female die which can be connected with each other, wherein a first feeding hole is formed in the male die, a first die core is arranged in the first feeding hole through a plurality of first split bridges, a first material distribution hole is formed between two adjacent first split bridges, a die hole is formed in the female die, and a first working belt is arranged between the first die core and the die hole; the two ends of the first mold core penetrate through mounting holes, an inner mold assembly is detachably mounted in the mounting holes, the inner mold assembly comprises a sleeve sleeved in the mounting holes and a second mold core mounted in the sleeve through a second shunt bridge, a second shunt hole is formed between every two adjacent second shunt bridges, and a second working belt is arranged between the second mold core and the first mold core. The assembled extrusion die adopts a modularized structure, so that the die processing difficulty is greatly reduced, the processing precision is improved, and the production cost and the maintenance cost are reduced.

Description

Assembled extrusion die

Technical Field

The utility model relates to an extrusion die, in particular to an assembled extrusion die.

Background

Hot extrusion is extrusion by heating a metal material to a hot forging temperature, that is, extrusion by heating a billet to a temperature equal to or higher than the recrystallization temperature of the metal before extrusion. In general, after hot extrusion of machine parts, machining such as cutting is used to improve dimensional accuracy and surface quality of the parts. The existing die adopts an integral structure, the die processing technology is high in difficulty and high in processing cost, and the die is not easy to repair after being damaged, even cannot be repaired, and the die is high in later-period use and maintenance cost.

Disclosure of Invention

【1】 Technical problem to be solved

The utility model aims to solve the technical problem of providing an assembled extrusion die which can realize disassembly, has low processing difficulty and cost and is convenient to maintain.

【2】 Technical proposal for solving the problems

The utility model provides an assembled extrusion die, which comprises a male die 1 and a female die 2 which can be connected with each other, wherein a first feeding hole 10 is formed in the male die 1, a first die core 3 is arranged in the first feeding hole 10 through a plurality of first shunt bridges 11, a first material distribution hole is formed between two adjacent first shunt bridges 11, a die hole 20 is formed in the female die 2, and a first working belt is arranged between the first die core 3 and the die hole 20; the two ends of the first mold core 3 are penetrated with mounting holes, an inner mold assembly is detachably mounted in the mounting holes, the inner mold assembly comprises a sleeve 41 sleeved in the mounting holes and a second mold core 42 mounted in the sleeve 41 through a second shunt bridge 44, a second shunt hole 43 is formed between two adjacent second shunt bridges 44, and a second working belt is arranged between the second mold core 42 and the first mold core 3.

Further, the mounting hole is a stepped hole, the large hole end of the stepped hole faces to the feeding end, and a stepped surface for contacting with the end of the sleeve 41 and realizing axial limiting is arranged in the stepped hole.

Further, the aperture of the sleeve 41 is the same as the aperture of the small hole of the mounting hole.

Further, the sleeve is interference fit within the mounting hole.

Further, the end of the sleeve 41 is flush with the end of the first mold core 3.

Further, a space is provided between the second split bridge 44 and the end of the sleeve 41, and a second feed hole is formed.

Further, the second mold core 42 includes a first core shaft and a second core shaft 421 coaxially disposed, where the first core shaft is a cone, the second core shaft is a cylinder, an annular protrusion is disposed on a side wall of the second core shaft 421 and forms a second inner bearing 422, and the second inner bearing 422 and a second outer bearing on the first mold core form the second working belt therebetween.

Further, an included angle between the side wall of the first mandrel and the axis of the first mandrel is more than or equal to 8 degrees and less than or equal to 12 degrees.

【3】 Advantageous effects

The assembled extrusion die adopts a split type module structure, the fragile part of the die is taken as the detachable module, and the part is directly and partially replaced after being damaged, so that the process difficulty of die processing is reduced, the part which is not machined originally can be directly processed, the processing precision is improved, the die processing time is reduced, the assembly and the disassembly are convenient and labor-saving, meanwhile, the use and later maintenance operation cost of the die is greatly reduced, and the whole service life of the die is prolonged.

Drawings

FIG. 1 is a schematic view of an assembled extrusion die of the present utility model;

FIG. 2 is a front view of an assembled extrusion die of the present utility model;

FIG. 3 is a schematic view of the working belt of the assembled extrusion die of the present utility model;

FIG. 4 is a schematic view of the internal mold assembly of the assembled extrusion die of the present utility model;

FIG. 5 is a cross-sectional view of the inner die assembly of the fabricated extrusion die of the present utility model;

fig. 6 is a cross-sectional view A-A of fig. 4.

Detailed Description

Embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.

Referring to fig. 1-6, the present utility model provides an assembled extrusion die, including a male die 1 and a female die 2, where the male die 1 and the female die 2 are coaxially disposed, and can realize mutual cooperative connection, and are all cylindrical, a hoisting hole is disposed on the side walls of the male die 1 and the female die 2, for hoisting and loading and unloading, a first feeding hole 10 is disposed on the male die 1, the first feeding hole 10 penetrates through two end surfaces of the male die, the whole body is in a truncated cone shape with a small inlet end and a large outlet end, a first die core 3 is disposed in the first feeding hole 10, the first die core 3 and the first feeding hole 10 are coaxially disposed, a plurality of first split bridges 11, typically 4-8, are uniformly disposed on the side walls of the first die core 3 in circumferential direction, the other ends of the first split bridges are connected with the first feeding hole 10, a first split hole is formed between two adjacent first split bridges 11, a welding cavity 21 is disposed on the end surface of the female die 2, a die hole 20 is disposed on the end surface of the welding cavity, a first outer bearing is disposed on the inner wall of the die hole 20, a first outer bearing is disposed on the outer wall of the first outer bearing, and a first outer bearing is formed between the first bearing and the first bearing.

The two ends of the first mold core 3 are penetrated with mounting holes, the mounting holes are coaxial with the first mold core 3, an inner mold assembly is detachably mounted in the mounting holes, the inner mold assembly comprises a sleeve 41 and a second mold core 42, the sleeve 41 is cylindrical and sleeved in the mounting holes, the second mold core 42 is arranged in the sleeve, a plurality of second shunt bridges 44 are circumferentially uniformly distributed on the side wall of the second mold core 42, the end parts of the second shunt bridges 44 are connected with the inner wall of the sleeve to realize rigid connection, a second shunt hole 43 is formed between two adjacent second shunt bridges 44, a space is formed between the second shunt bridges 44 and the end parts of the sleeve 41, a second feeding hole is formed between the second mold core 42 and the first mold core 3, and a second working belt is arranged between the second mold core 42 and the first mold core 3.

In the application, the mounting hole is a stepped hole, the large hole end of the stepped hole faces to the feeding end, the sleeve 41 is installed in the large hole of the stepped hole in an interference fit manner, during assembly, the sleeve (inner die assembly) is placed into liquid nitrogen for cooling, then the sleeve is placed into the mounting hole to realize interference fit, a stepped surface is arranged in the stepped hole, during assembly, the stepped surface is in contact (fit) with the rear end part of the sleeve 41 to realize axial limiting of the sleeve, and after assembly, the end part of the sleeve 41 is flush with the end part of the first die core 3; in this embodiment, the aperture of the sleeve 41 is the same as that of the small hole of the mounting hole, and when the sleeve is detached, the first mold core is heated and expanded, and then the second mold core is forced from the discharge end and the inner mold assembly is ejected from the mounting hole, so that the detachment is realized.

Referring to fig. 4-6, the second mandrel 42 includes a first mandrel and a second mandrel 421 coaxially disposed, where the first mandrel is a cone, the side wall of the first mandrel is an inclined plane, in this embodiment, an included angle between the side wall of the first mandrel and the axis of the first mandrel is greater than or equal to 8 degrees and less than or equal to 12 degrees, preferably 10 degrees, the diameter of the inlet end of the first mandrel is small, the diameter of the outlet end of the second mandrel is large, the second mandrel is a cylinder coaxially disposed at the large diameter end of the first mandrel, the diameter of the second mandrel is the same as the diameter of the large diameter end of the first mandrel, or the first mandrel and the second mandrel are connected through an arc transition, the side wall of the second mandrel 421 is provided with an annular protrusion, and forms a second inner bearing 422, a second weld is disposed on the first mandrel, a gap is disposed in the weld cavity, the second outer bearing faces the second inner bearing 422 and forms a second working bearing, the whole of the first working bearing and the second working bearing is an annular structure, and a third working bearing is connected between the first working bearing and the second working bearing is a cross-section formed after the working bearing and the cross-section is formed.

The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that it will be apparent to those skilled in the art that several modifications and variations can be made without departing from the technical principle of the present utility model, and these modifications and variations should also be regarded as the scope of the utility model.

Claims

1. An assembled extrusion die, characterized in that: the die comprises a male die and a female die which can be connected with each other, wherein a first feeding hole is formed in the male die, a first die core is arranged in the first feeding hole through a plurality of first shunt bridges, a first material distribution hole is formed between two adjacent first shunt bridges, a die hole is formed in the female die, and a first working belt is arranged between the first die core and the die hole; the two ends of the first mold core penetrate through mounting holes, an inner mold assembly is detachably mounted in the mounting holes, the inner mold assembly comprises a sleeve sleeved in the mounting holes and a second mold core mounted in the sleeve through a second shunt bridge, a second shunt hole is formed between every two adjacent second shunt bridges, and a second working belt is arranged between the second mold core and the first mold core.

2. The fabricated extrusion die of claim 1, wherein: the installation hole is a stepped hole, the large hole end of the stepped hole faces to the feeding end, and a stepped surface which is used for being in contact with the end part of the sleeve and achieving axial limiting is arranged in the stepped hole.

3. The fabricated extrusion die of claim 2, wherein: the aperture of the sleeve is the same as the aperture of the small hole of the mounting hole.

4. The fabricated extrusion die of claim 1, wherein: the sleeve is in interference fit with the mounting hole.

5. The fabricated extrusion die of claim 1, wherein: the end of the sleeve is flush with the end of the first mold core.

6. The fabricated extrusion die of claim 1, wherein: and a space is arranged between the second shunt bridge and the end part of the sleeve, and a second feeding hole is formed.

7. The fabricated extrusion die of claim 1, wherein: the second die core comprises a first mandrel and a second mandrel which are coaxially arranged, the first mandrel is a cone, the second mandrel is a cylinder, the side wall of the second mandrel is provided with an annular bulge and forms a second inner bearing, and a second working belt is formed between the second inner bearing and a second outer bearing on the first die core.

8. The fabricated extrusion die of claim 7, wherein: and an included angle between the side wall of the first mandrel and the axis of the first mandrel is more than or equal to 8 degrees and less than or equal to 12 degrees.