Method for quickly cleaning residual copper of large-width-to-small-narrow-ratio copper bar extrusion die

Abstract

The present application relates to copper bar production technical field, disclose a big wide narrow ratio copper bar extrusion die residual copper fast cleaning method, including in the die outlet reserve a certain length of copper bar, with the drawing machine clamping the copper bar outside the die outlet to the copper bar extrusion direction drawing, make the die and the die cavity separate;The die separated from the die cavity is installed on the tool, the copper bar outside the die outlet is clamped with the drawing machine to the copper bar extrusion direction drawing until the copper bar breaks, and the residual copper falls off from the die automatically.The present application can solve the problem of long time consumption, low efficiency in the prior art, greatly improve the efficiency of die residual copper cleaning, and can be applied to all die residual copper cleaning of continuous extrusion larger section.

Description

Technical Field

[0001] This invention relates to the field of copper busbar production technology, specifically to a method for rapidly cleaning residual copper from a copper busbar extrusion die with a large aspect ratio. Background Technology

[0002] Copper busbars are often produced using extrusion molding. During continuous production of copper busbars with large width-to-narrowness ratios, the high flow resistance and temperature generated by the copper material passing through the die during extrusion are significant. Under prolonged high temperatures, the copper material easily adheres to the die filling area and sizing zone. Furthermore, the die and cavity are cold-assembled before production, and thermal expansion occurs after prolonged high-temperature production. When disassembling the die after production, the thermal expansion makes disassembly difficult, and the adhered copper material remains inside the die, which is difficult to remove after cooling. Current production processes rely on manual hammering to separate the thermally expanded die from the cavity. This separation is labor-intensive, time-consuming, and prone to die wear due to uneven force application. For cleaning residual copper from the die after disassembly, existing technologies first remove most of the residual copper using a drilling machine or wire cutting, and then manually remove the remaining copper from the die. This cleaning operation is cumbersome, time-consuming, and inefficient. Summary of the Invention

[0003] The present invention aims to provide a method for rapid cleaning of residual copper in copper busbar extrusion dies with large aspect ratios, in order to solve the problems of long time consumption and low efficiency in the existing technology, which involves manual hammering to dismantle copper busbar extrusion dies with large aspect ratios and manual removal of residual copper.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a method for rapid cleaning of residual copper in a large aspect ratio copper busbar extrusion die, comprising the following steps:

[0005] A. Reserve a copper busbar with a length greater than or equal to 100mm at the mold exit. Use a drawing machine to clamp the copper busbar outside the mold exit and pull it in the direction of copper busbar extrusion to separate the mold from the mold cavity.

[0006] B. Install the mold separated from the mold cavity onto the tooling, and use a drawing machine to clamp the copper busbar outside the mold outlet and pull it in the direction of copper busbar extrusion until the copper busbar breaks and the residual copper automatically falls out of the mold.

[0007] Preferably, as an improvement, if the residual copper does not automatically fall off the mold in step B, the residual copper is knocked off from the mold in the opposite direction to the drawing process.

[0008] Preferably, as an improvement, if the residual copper does not fall out of the mold in step B, the mold is installed in reverse on the tooling, and the copper busbar on the outside of the mold inlet is clamped by a drawing machine and pulled once in the mold feeding direction.

[0009] Preferably, as an improvement, the length of the copper bar gripped by the drawing machine is 100-150 mm.

[0010] Preferably, as an improvement, the jig in step B comprises a rectangular block-shaped body, a circular mounting groove is formed on one side wall of the body, a through groove penetrating the body is arranged at the bottom of the mounting groove, and the die is embedded in the mounting groove, and the copper bar outside the die outlet is inserted in the through groove.

[0011] The principle and advantages of the present application are as follows: in actual application, the copper bar with a large width-to-thickness ratio has a large flow resistance in the die during extrusion forming, which results in a high temperature in the die, so that the copper bar is easily bonded to the die. After the extrusion forming is completed, the cooled copper bar is bonded in the die. The present application makes full use of the equipment in the copper bar production workshop, provides a unidirectional tension force by using a drawing machine required for cable and copper bar production, uses the copper bar remaining in the die as a force point, uniformly disperses the tension force to the die by using the uniformity of the copper material flow filling in the die during extrusion forming, so that the die can be uniformly stressed, and then the die can be smoothly separated from the die cavity without causing damage to the die. The die is clamped by a special jig, and the residual copper is clamped and drawn again. The copper bar fracture is used as a force index, and the residual copper in the die is automatically separated from the die by plastic deformation during the drawing process. Since the residual copper in the die is a whole, each part bonded to the die is separated due to the influence of deformation after plastic deformation, so that a gap is formed between the residual copper and the die, and then the residual copper is easily removed from the die. The clamping length of the residual copper and the structural design of the jig make the drawing and separation of the residual copper stable and feasible, and the separation rate of the residual copper in the die can reach more than 90%. The present application separates the residual copper in the die by using the drawing machine for copper bar production, and the separation process is fast and the separation effect is remarkable. The residual copper can be quickly separated from the die, and then the residual copper can be quickly and efficiently cleaned from the die. Compared with the existing technology of manually hammering and separating the die, the present application has small damage to the die, low labor intensity, high die separation efficiency, and is simpler, shorter in time, lower in labor intensity, and higher in residual copper cleaning efficiency than the existing technology of first removing most of the residual copper by a drilling machine or a wire cutting machine, and then manually removing the remaining residual copper from the die. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 FIG. 1 is a structural schematic diagram of the jig in the embodiment of the present application.

[0013] Figure 2 FIG. 2 is a structural schematic diagram of the die installed on the jig in the embodiment of the present application. DETAILED DESCRIPTION

[0014] The present application will be further described in detail by specific embodiments:

[0015] The reference signs in the drawings of the specification include: tool 1, die 2, copper bar 3, residual copper 4, body 101, mounting groove 102, through groove 103.

[0016] Embodiment, large width-to-thickness ratio copper bar extrusion die residual copper rapid cleaning method, comprising the following steps:

[0017] A, the copper bar 3 with a reserved length of 100 mm or more at the outlet of the die 2 is pulled in the extrusion direction of the copper bar 3 by clamping the copper bar 3 outside the outlet of the die 2 with a drawing machine, so that the die 2 is separated from the die cavity;

[0018] B, the die 2 separated from the die cavity is mounted on the tool 1, substantially as shown in the accompanying Figure 2 ; The tool 1 includes a rectangular block-shaped body 101, as shown in Figure 1 , a circular mounting groove 102 is formed on one side wall of the body 101, a through groove 103 penetrating the body 101 is provided at the bottom of the mounting groove 102, the die 2 is embedded in the mounting groove 102, and the copper bar 3 outside the outlet of the die 2 is inserted into the through groove 103; the copper bar 3 outside the outlet of the die 2 is pulled in the extrusion direction of the copper bar 3 by clamping the copper bar 3 with a drawing machine, the length of the copper bar 3 clamped with the drawing machine is 100-150 mm, until the copper bar 3 is broken, and the residual copper 4 automatically falls off from the die 2; if the residual copper 4 does not automatically fall off from the die 2 after drawing, knock the residual copper 4 from the opposite direction to make it fall off; if the residual copper 4 does not fall off from the die 2 after drawing or knocking, the die 2 is mounted reversely on the tool 1, and the copper bar 3 outside the inlet of the die 2 is pulled in the feeding direction of the die 2 once with the drawing machine.

[0019] The copper bar with large width-to-thickness ratio has large flow resistance of copper material in the mold 2 during the extrusion forming process, which causes high temperature in the mold 2, so that the copper material is easy to adhere to the mold 2. After the extrusion forming is completed, the cooled copper material is bonded in the mold 2. The present scheme fully utilizes the copper bar 3 production workshop equipment, uses the drawing machine required for cable and copper bar 3 production to provide unidirectional tension, uses the copper bar 3 remaining in the mold 2 as a force point, utilizes the uniformity of copper material flow filling in the mold 2 during the extrusion forming process, uniformly disperses the tension to the mold 2, so that the mold 2 can be uniformly stressed, and then the mold 2 can be smoothly separated from the mold cavity without damaging the mold 2. Then the mold 2 is clamped by the special tool 1, and the residual copper 4 is clamped and drawn again. The copper bar 3 fracture is used as the force index, and the residual copper 4 in the mold 2 is plastic deformed to automatically separate and fall off from the mold 2 during the drawing process. Since the residual copper 4 in the mold 2 is an integral whole, each part bonded with the mold 2 is separated due to the influence of plastic deformation, so that a gap is formed between the residual copper 4 and the mold 2, and then the residual copper 4 is easily removed from the mold 2. The clamping length of the residual copper 4 and the structure design of the tool 1 make the drawing and separation of the residual copper 4 in the present scheme stable and feasible, and the separation rate of the residual copper 4 in the mold 2 can reach more than 90%. The present scheme separates the residual copper 4 in the mold 2 by using the drawing machine required for copper bar production. The separation process is fast and the separation effect is remarkable. The residual copper 4 can be quickly separated from the mold 2, and then the residual copper 4 can be quickly and efficiently cleaned out of the mold 2. Compared with the existing technology of manually hammering and separating the mold 2, the present scheme has small damage to the mold 2, low labor intensity, high separation efficiency of the mold 2, and is simpler, shorter in time, lower in labor intensity, and higher in residual copper cleaning efficiency compared with the existing technology of first removing most of the residual copper 4 by a drilling machine or a wire cutting machine, and then manually removing the remaining residual copper 4 from the mold 2.

[0020] The above is only an embodiment of the present application, and common technical solutions and / or characteristics in the scheme are not described in detail. It should be noted that those skilled in the art can make some modifications and improvements without departing from the technical solutions of the present application, which should be considered as the protection scope of the present application. The protection scope of the present application should be subject to the content of its claims, and the specific embodiments in the description can be used to explain the content of the claims.

Claims

1. A method for quickly cleaning residual copper from a large-width-to-narrow-width copper busbar extrusion die, characterized in that: It comprises the following steps: A. A copper bar with a reserved length of 100mm or more at the exit of the die is clamped by the drawing machine outside the die exit to draw the copper bar in the extrusion direction, so that the die is separated from the die cavity; B. The die separated from the die cavity is installed on the tool, the copper bar outside the die exit is clamped by the drawing machine to draw the copper bar in the extrusion direction until the copper bar is broken, and the residual copper is automatically dropped from the die; The tool in step B comprises a rectangular block-shaped body, a circular mounting groove is formed on one side wall of the body, a through groove penetrating through the body is arranged at the bottom of the mounting groove, the die is embedded in the mounting groove, and the copper bar outside the die exit is inserted into the through groove.

2. The method for quickly cleaning residual copper of a large-width-to-small- width copper busbar extrusion die according to claim 1, characterized in that: If the residual copper is not automatically dropped from the die in step B, the residual copper is knocked from the opposite direction to the drawing direction to drop it.

3. The method of claim 1, wherein the method is characterized by: If the residual copper is not dropped from the die in step B, the die is reversely installed on the tool, and the copper bar outside the die inlet is clamped by the drawing machine to draw it in the feeding direction of the die once.

4. The method according to any one of claims 1-3, wherein the method is characterized in that: The length of the copper bar clamped by the drawing machine is 100-150mm.

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