CN211915020U

CN211915020U - Hot extrusion forming die for red copper products

Info

Publication number: CN211915020U
Application number: CN201922467933.2U
Authority: CN
Inventors: 马运昌; 王金彪; 刘龙飞
Original assignee: SUZHOU FEIYU PRECISION TECHNOLOGY CO LTD
Current assignee: SUZHOU FEIYU PRECISION TECHNOLOGY CO LTD
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-11-13
Anticipated expiration: 2029-12-31

Abstract

The utility model discloses a red copper product hot extrusion mould in red copper product shaping technical field aims at solving prior art red copper product hardness not good enough, appears easily such as the technical problem of phenomenons such as fracture, scarce material. The die is used for die-casting the red copper base material reaching the preset temperature to obtain a red copper product semi-finished product, and comprises a male die and a female die, wherein the top surface of the female die is provided with a guide boss connected end to end, and the bottom end of the male die is clamped on the inner side of the guide boss and is in sliding connection with the guide boss.

Description

Hot extrusion forming die for red copper products

Technical Field

The utility model relates to a red copper product hot extrusion mould belongs to red copper product shaping technical field.

Background

The red copper is relatively pure copper, can be generally considered as pure copper approximately, has good conductivity and plasticity, but has poor strength and hardness. Since red copper has excellent thermal conductivity, ductility and corrosion resistance, it is widely used in the electrical field. The practice of mass production proves that the red copper product manufactured by adopting the cold extrusion process has poor hardness, and phenomena such as cracking, material shortage and the like often occur.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art, the utility model aims to provide a red copper product hot extrusion mould to red copper product hardness is not good enough among the solution prior art, appears easily such as the technical problem of phenomenon such as fracture, scarce material.

In order to solve the technical problem, the utility model discloses the technical scheme who adopts is:

a red copper product hot extrusion forming die is used for carrying out die-casting forming on a red copper base material reaching a preset temperature to obtain a red copper product semi-finished product; the die comprises a male die and a female die, wherein the top surface of the female die is provided with guide bosses connected end to end, and the bottom end of the male die is clamped on the inner sides of the guide bosses and is in sliding connection with the guide bosses.

Further, still include the upper die base with public mould top surface fixed connection, the upper die base top surface is towards the power take off end of punch press, the punch press drives public mould through the upper die base and makes rectilinear extrusion motion towards the master model.

Furthermore, the die also comprises a lower die holder fixedly connected with the bottom surface of the female die.

Further, the male die or/and the female die is/are made of at least any one of high-alloy tool steel, high-speed tool steel and hard alloy.

Furthermore, the top surface of the female die is also provided with a square sinking groove, and the bottom of the square sinking groove is provided with at least one round sinking groove.

Furthermore, the number of the circular sinking grooves is two, and the two circular sinking grooves are symmetrically distributed in the square sinking groove.

Compared with the prior art, the utility model discloses the beneficial effect who reaches: the red copper base material is subjected to hot-press forming at a set temperature, so that the red copper base material has good plasticity due to heating, and hot brittleness caused by overhigh set temperature is avoided. The shrinkage cavity and shrinkage porosity defects of the red copper base material blank are eliminated through hot extrusion, the internal structure of the blank also reaches the broken crystal grains in a forging state, and the comprehensive mechanical properties of the blank are obviously improved. The semi-finished red copper product obtained by thermoforming is machined so as to obtain the finished red copper product with obviously improved physical properties. The utility model discloses method and mould thereof can overcome red copper product fracture, technological defects such as scarce material, has saved process time simultaneously, has controlled product cost.

Drawings

Fig. 1 is a schematic cross-sectional structure diagram of an embodiment of the mold of the present invention;

fig. 2 is a schematic top view of the female mold according to the embodiment of the present invention.

In the figure: 1. an upper die holder; 2. a male die; 3. a female die; 31. a guide boss; 4. a lower die holder; 5. a square sink groove; 51. a circular sink.

Detailed Description

The present invention will be further described with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

It should be noted that, in the description of the present invention, the terms "front", "rear", "left", "right", "upper", "lower", "inner", "outer", etc. indicate the directions or positional relationships based on the directions or positional relationships shown in the drawings, and are only for convenience of description of the present invention but do not require the present invention to be constructed and operated in a specific direction, and thus, should not be construed as limiting the present invention. As used in the description of the present invention, the terms "front," "back," "left," "right," "up," "down" and "in" refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.

The technical idea of the utility model is that the red copper base material is hot extruded at a set temperature, and the red copper base material has good plasticity due to heating, thereby reducing the deformation resistance; meanwhile, the set temperature is not too high, so that the melting of low-melting-point substances among metal crystal grains is avoided, the crystal grains are not mutually connected, and the alloy strength is reduced. Therefore, the temperature is required to be set within a specific value, the hot brittleness during extrusion is avoided, the defects of shrinkage cavity and shrinkage porosity of the blank are eliminated through hot extrusion, the internal structure of the blank reaches the broken crystal grains in a forging state, and the comprehensive mechanical property of the blank is obviously improved.

In order to achieve the above object, the present invention provides a red copper product hot extrusion molding method, which comprises the following steps:

step 1, performing blanking truncation on a red copper raw material by using a blanking machine to obtain a red copper base material with a preset size;

step 2, placing the fed red copper base material into a feeding machine, and heating to 800 ℃;

and 3, placing the red copper base material heated to 800 ℃ in a preset die, and carrying out die-casting molding on the red copper base material in the die by using a 200T punch press to obtain a red copper product semi-finished product. It should be noted that the external dimension of the semi-finished product of the red copper product should be enough for the machining allowance of the semi-finished product of the red copper product to be machined into the finished product of the red copper product;

step 4, putting the semi-finished product of the red copper product into a pickling tank, and removing the oxidized black skin on the surface of the semi-finished product of the red copper product by using a pickling solution;

and 5, machining the semi-finished product of the red copper product after the oxidized black skin is removed to obtain a finished product of the red copper product. Through experimental verification, for directly carrying out the machining to red copper raw and other materials and carrying out the traditional approach of machining again after cold extrusion moulding to red copper raw and other materials, utilize the utility model discloses technical defect such as red copper product fracture, scarce material can be overcome completely to the method, has saved process time simultaneously, has controlled product cost.

The utility model discloses specific embodiment provides a red copper product hot extrusion mould, the utility model discloses the mould is used for realizing aforementioned step 3 in order to acquire red copper product semi-manufactured goods, and in this embodiment, this mould is used for processing the red copper product that the article name is 5879, 5880, 5881. As shown in fig. 1, it is the schematic cross-sectional structure of the embodiment of the mold of the present invention, the mold comprises an upper mold base 1, a male mold 2, a female mold 3, and a lower mold base 4 from top to bottom. The top surface of the male die 2 is fixedly connected with the upper die holder 1, the top surface of the upper die holder 1 faces the power output end of the punch press, and the punch press can drive the male die 2 to do linear extrusion motion towards the female die 3 through the upper die holder 1. The bottom surface of the female die 3 is fixedly connected with the lower die holder 4.

More specifically, as shown in fig. 2, be the utility model discloses mould embodiment the overlook schematic structure of female mould, the 3 top surfaces of female mould are equipped with end to end's

direction boss

31, 2 bottom joints of public mould in direction boss 31 inboard rather than sliding connection to play the direction and inject the effect of 2 direction of motion of public mould, avoid public mould 2 to take place lateral shifting when making linear motion along vertical direction, and then influence product machining precision.

The middle position of the top surface of the female die 3 is provided with a square sinking groove 5, the bottom of the square sinking groove 5 is provided with two round sinking grooves 51, and the two round sinking grooves 51 are distributed in the square sinking groove 5 in a bilateral symmetry manner. The square sink groove 5 and the two circular sink grooves 51 form a cavity for molding and processing the red copper product semi-finished product, and the external dimension of the cavity is approximately the same as that of the red copper products with the names of 5879, 5880 and 5881, but the machining allowance for machining the red copper product semi-finished product into the red copper product finished product is required to be reserved. In order to ensure that the die of the present invention has sufficient structural strength and hardness under the hot extrusion condition, the male die 2 and the female die 3 are usually made of one or more of high alloy tool steel, high speed tool steel and hard alloy.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be considered as the protection scope of the present invention.

Claims

1. A red copper product hot extrusion forming die is characterized by being used for carrying out die-casting forming on a red copper base material reaching a preset temperature to obtain a red copper product semi-finished product; the die comprises a male die (2) and a female die (3), wherein the top surface of the female die (3) is provided with a guide boss (31) which is connected end to end, and the bottom end of the male die (2) is clamped on the inner side of the guide boss (31) and is in sliding connection with the guide boss.

2. The hot extrusion molding die for red copper products according to claim 1, further comprising an upper die holder (1) fixedly connected with the top surface of the male die (2), wherein the top surface of the upper die holder (1) faces the power output end of the punch press, and the punch press drives the male die (2) to perform linear extrusion movement towards the female die (3) through the upper die holder (1).

3. The hot extrusion molding die for the red copper product according to claim 1, further comprising a lower die holder (4) fixedly connected with the bottom surface of the female die (3).

4. The hot extrusion molding die for red copper products according to claim 1, wherein the male die (2) or/and the female die (3) is made of at least one of high alloy tool steel, high speed tool steel and hard alloy.

5. The hot extrusion molding die for red copper products as claimed in claim 1, wherein the top surface of the female die (3) is further provided with a square sink groove (5), and the bottom of the square sink groove (5) is provided with at least one round sink groove (51).

6. The hot extrusion molding die for red copper products as claimed in claim 5, wherein there are two circular sinking grooves (51), and the two circular sinking grooves (51) are symmetrically distributed in the square sinking groove (5).