CN211330762U

CN211330762U - Distributed metal wire drawing die

Info

Publication number: CN211330762U
Application number: CN201922178580.4U
Authority: CN
Inventors: 张本琪; 虞燕萍; 苏中贻
Original assignee: Jiangsu Shangci Plastic Products Co ltd
Current assignee: Jiangsu Shangci Plastic Products Co ltd
Priority date: 2019-12-09
Filing date: 2019-12-09
Publication date: 2020-08-25
Anticipated expiration: 2029-12-09

Abstract

The utility model discloses a distributing type metal wire rod drawing die in drawing die technical field aims at solving drawing die among the prior art and draws the short-term rapid heating up of in-process at metal wire rod, leads to the inhomogeneous technical problem of metal wire rod mechanical properties. The die comprises at least two drawing die bodies which are connected in series along the axial direction, at least two bosses which are symmetrically distributed around the axial direction are arranged on the inner wall of each drawing die body, and the projection of each boss of each drawing die body on the axial direction is adapted to the linear shape of a metal wire finished product; a circulating cavity which forms a loop with the cooling device is arranged between the inner wall and the outer wall of the drawing die body.

Description

Distributed metal wire drawing die

Technical Field

The utility model relates to a distributing type metal wire rod drawing die belongs to drawing die technical field.

Background

The drawing die is a pressure processing tool which realizes the compression of the metal blank when drawing the metal blank so as to lead the metal blank to reach the preset shape and size requirements. At present, most of domestic metal wire drawing processing selects for use cold drawing extrusion and moulding mould, and the hole shape of this kind of traditional mould is circular, and the transition of edge arc can be used to the circular drawing rolling of wire rod. In the process of drawing the metal wire, the die simultaneously bears various external forces such as tensile stress, shear stress, surface friction and the like, and the surface of the die can generate high temperature rapidly in a short time, so that the mechanical property of the metal wire is uneven.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art, the utility model aims to provide a distributing type metal wire drawing die to solve drawing die among the prior art and draw the short-term sharp intensification of in-process at metal wire, lead to the inhomogeneous technical problem of metal wire mechanical properties.

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

a distributed metal wire drawing die comprises at least two drawing die bodies which are connected in series along the axial direction, wherein at least two bosses which are symmetrically distributed around the axial direction are arranged on the inner wall of each drawing die body, and the projection of each boss of each drawing die body on the axial direction is adapted to the linear shape of a metal wire finished product; a circulating cavity which forms a loop with the cooling device is arranged between the inner wall and the outer wall of the drawing die body.

Furthermore, the boss is arranged on the rear half part of the drawing die body, and the boss is in arc transition with the inner wall of the front half part of the drawing die body.

Further, the circulation cavity is arranged between the boss and the outer wall of the drawing die body.

Further, the cross section of the circulating cavity is in a circular arc shape concentric with the drawing die body.

Further, the cooling device comprises a cooling tank, a water inlet pipe and a water outlet pipe, wherein the water inlet pipe and the water outlet pipe are communicated with the cooling tank, and the cooling tank forms a loop with the circulation cavity through the water inlet pipe and the water outlet pipe.

Further, at least any one of the cooling tank, the water inlet pipe and the water outlet pipe is a plastic piece.

Furthermore, the circulating cavity is coated with a high-temperature resistant film.

Compared with the prior art, the utility model discloses the beneficial effect who reaches: not less than two drawing die bodies are connected in series along the axial direction, and the distributed design is favorable for dispersing external force born by each drawing die body, further dispersing heat generated by each drawing die body, avoiding rapid temperature rise of the die in short time, and further striving for more favorable time and space conditions for cooling. The inner wall and the outer wall of the drawing die body are provided with a circulating cavity which forms a loop with the cooling device, so that heat generated by the drawing die body can be taken away in time, the circulating cavity is arranged between the lug boss and the outer wall of the drawing die body for taking structural strength and cooling effect into consideration, and the cross section of the circulating cavity is in a circular arc shape concentric with the drawing die body.

Drawings

FIG. 1 is a schematic view of the overall structure of a longitudinal section of an embodiment of the present invention;

fig. 2 is a schematic diagram of a transverse cross-sectional structure of a first drawing die body according to an embodiment of the present invention;

fig. 3 is a schematic diagram of a transverse cross-sectional structure of a second drawing die body according to an embodiment of the present invention;

fig. 4 is a schematic diagram of a transverse cross-section structure of a third drawing die body according to an embodiment of the present invention.

In the figure: 1. a metal wire stock; 11. a semi-finished metal wire; 12. metal wire finished products; 2. a circulation chamber; 3. a boss; 4. a first drawing die body; 5. a second drawing die body; 6. and a third drawing die body.

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 utility model discloses a specific embodiment provides a distributing type metal wire drawing die, as shown in FIG. 1, be the embodiment of the utility model provides a longitudinal section overall structure sketch map, including a plurality of along the drawing die body of its axial series connection, in this embodiment, the drawing die body is including the first drawing die body 4, second drawing die body 5, the third drawing die body 6 of establishing ties in proper order, and the inner wall of every drawing die body is equipped with and is no less than two bosses 3 around its axial symmetric distribution, boss 3 is located drawing die body latter half, boss 3 and the first half inner wall arc transition of drawing die body to do benefit to reducing the axial tensile stress of mould at the 11 extrusion in-process to metal wire stock 1 and metal wire semi-manufactured goods. The projections of the bosses 3 of the first drawing die body 4, the second drawing die body 5 and the third drawing die body 6 in the axial direction are adapted to the linear shape of the metal wire finished product 12. The workflow of this embodiment is as follows: the metal wire blank 1 is fed in from the left side of the first drawing die body 4, the metal wire semi-finished product 11 is output from the right sides of the first drawing die body 4 and the second drawing die body 5, and the metal wire finished product 12 is output from the right side of the third drawing die body 6 after the metal wire semi-finished product 11 output by the second drawing die body 5 is extruded. The distributed design is favorable for dispersing external force born by each drawing die body, further dispersing heat generated by each drawing die body, and avoiding rapid temperature rise of the die in a short time, thereby striving for more favorable time and space conditions for cooling.

In order to solve the problem of uneven mechanical property of the metal wire due to local high temperature, a circulating cavity 2 is arranged between the inner wall and the outer wall of the drawing die body, a water inlet is formed in the right side of the circulating cavity 2, a water outlet is formed in the left side of the circulating cavity 2, and the circulating cavity 2 and a cooling device form a loop through the water inlet and the water outlet. In this embodiment, the cooling device is a cooling tank with a built-in water pump, the cooling tank is filled with condensate or liquid water, the cooling tank is communicated with the water inlet of the circulation cavity 2 through a water inlet pipe, and is communicated with the water outlet of the circulation cavity 2 through a water outlet pipe, so that the cooling tank and the circulation cavity 2 form a cooling loop. Because the drawing die body is a metal piece, in order to avoid corrosion caused by contact of condensate or liquid water with the metal piece, the cooling tank, the water inlet pipe and the water outlet pipe are plastic pieces, and the circulating cavity 2 is laid with a high-temperature-resistant film.

More specifically, as shown in fig. 2 to fig. 4, which are schematic diagrams of the transverse cross-section structure of the first, second and third drawing die bodies according to the embodiment of the present invention, each drawing die body is provided with three bosses 3, and the bosses 3 are formed at 120 degrees. First drawing die body 4 is to metal wire stock 1 extrusion processing, form the recess that suits with boss 3 on metal wire stock 1 surface, thereby play the effect of fixed its angle of deflection to metal wire stock 1, it steadily gets into second drawing die body 5 to have ensured by the semi-manufactured goods 11 of metal wire of first drawing die body 4 output, second drawing die body 5 has the coincidence of one-third to the machined surface of semi-manufactured goods 11 of metal wire and first drawing die body 4, there is the coincidence of one-third to the machined surface of semi-manufactured goods 11 of metal wire and second drawing die body 5 of third drawing die body 6, in order to avoid the problem of hourglass processing. For taking structural strength and cooling effect of the drawing die body into consideration, the circulating cavity 2 is arranged between the boss 3 and the outer wall of the drawing die body, and the cross section of the circulating cavity is in a circular arc shape concentric with the drawing die body.

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 distributed metal wire drawing die is characterized by comprising at least two drawing die bodies which are connected in series along the axial direction, wherein at least two bosses (3) which are symmetrically distributed around the axial direction are arranged on the inner wall of each drawing die body, and the projection of each boss (3) of each drawing die body in the axial direction is matched with the linear shape of a metal wire finished product (12); a circulating cavity (2) forming a loop with the cooling device is arranged between the inner wall and the outer wall of the drawing die body.

2. The distributed metal wire drawing die of claim 1, wherein the boss (3) is provided at the rear half part of the drawing die body, and the boss (3) is in arc transition with the inner wall of the front half part of the drawing die body.

3. A distributed wire rod drawing die according to claim 1, wherein the circulation chamber (2) is provided between the boss (3) and the outer wall of the drawing die body.

4. A distributed metal wire drawing die according to claim 1, wherein the cross-section of said circulation cavity (2) is in the shape of a circular arc concentric with the drawing die body.

5. The distributed metal wire drawing die of any one of claims 1 to 4, wherein the cooling means comprises a cooling tank, a water inlet pipe and a water outlet pipe communicating with the cooling tank, the cooling tank forming a loop with the circulation chamber (2) through the water inlet pipe and the water outlet pipe.

6. The distributed metal wire drawing die of claim 5, wherein at least one of the cooling tank, the water inlet pipe and the water outlet pipe is a plastic member.

7. A distributed wire drawing die according to claim 5, wherein the recycling cavities (2) are coated with a high temperature resistant film.