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Preparation process of red copper square pipe material

A preparation process, the technology of red copper, applied in the direction of wire drawing die, mandrel, etc., can solve the problems of unguaranteed inner size and waist collapse, so as to achieve the effect of ensuring compliance with requirements, avoiding waist collapse, and ensuring product quality

Active Publication Date: 2016-05-11
中铝洛阳铜加工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The copper square tube follows the traditional process: the last round of drawing the circular tube to the square tube, the radius R of the rounded corner of the square tube is too large (up to 4mm), the center part of the outer dimension collapses (about -0.50mm), and the inner dimension non-guaranteed issues

Method used

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  • Preparation process of red copper square pipe material
  • Preparation process of red copper square pipe material
  • Preparation process of red copper square pipe material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A red copper square tube, the finished product specification is 35×35×5mm, the outer dimension deviation and the inner dimension deviation are both ±0.10mm, and the radius R of the inner fillet and the outer fillet is less than or equal to 1mm. The preparation process is as follows:

[0031] Melting and casting: Put the red copper for electric conduction into coreless or cored vacuum induction furnace to melt and cast the ingot.

[0032] Ingot sawing: using a sawing machine to saw the head and tail of the ingot;

[0033] Water seal extrusion: After sawing the ingot, push the heated ingot into the extrusion barrel of a 3150-ton hydraulic press, heating temperature: 790°C, extrusion speed: 42mm / s, extrusion ratio: 21, excess thickness: 30mm, the extrusion process adopts the water seal peeling method, the ingot extruded by the extrusion shaft flows out through the outlet of the mold, and the outlet of the mold is connected to the water tank filled with water, and the extru...

Embodiment 2

[0045] A red copper square tube, the finished product specification is 25×25×4mmmm, the outer dimension deviation and the inner dimension deviation are both ±0.10mm, and the radius R of the inner fillet and the outer fillet is less than or equal to 1mm. The preparation process is as follows:

[0046] Melting and casting: Put the red copper for electric conduction into the coreless or cored vacuum induction furnace to melt and cast the ingot.

[0047] Ingot sawing: using a sawing machine to saw the head and tail of the ingot;

[0048] Water seal extrusion: After sawing the ingot, push the heated ingot into the extrusion barrel of a 3150-ton hydraulic press, heating temperature: 840°C, extrusion speed: 43mm / s, extrusion ratio: 21, excess thickness: 33mm, the extrusion process adopts the water seal peeling method, the ingot extruded by the extrusion shaft flows out through the outlet of the mold, and the outlet of the mold is connected to the water tank filled with water, and the...

Embodiment 3

[0060] A red copper square tube, the finished product specification is 45×45×6mm, the outer dimension deviation and the inner dimension deviation are both ±0.10mm, and the radius R of the inner fillet and the outer fillet is less than or equal to 1mm. The preparation process is as follows:

[0061] Melting and casting: Put the red copper for electric conduction into coreless or cored vacuum induction furnace to melt and cast the ingot.

[0062] Ingot sawing: using a sawing machine to saw the head and tail of the ingot;

[0063] Water seal extrusion: After sawing the ingot, push the heated ingot into the extrusion barrel of a 3150-ton hydraulic press, heating temperature: 830°C, extrusion speed: 42mm / s, extrusion ratio: 21, excess thickness: 33mm, the extrusion process adopts the water seal peeling method, the ingot extruded by the extrusion shaft flows out through the outlet of the mold, and the outlet of the mold is connected to the water tank filled with water, and the extru...

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Abstract

The invention provides a preparation process of a red copper square pipe material. The process comprises the following flow processes of casting, cast ingot sawing and cutting, water seal extrusion, sawing and cutting, straightening, rolling, chain type drawbench circular drawing, circular transition to square pipe material hollow pulling, square pipe material hollow pulling, shaping drawing, finishing, bright annealing and packaging; the diameter shaping drawing is firstly performed after the rolling; the transition to the square pipe material is realized; the diameter shaping hollow pulling is performed; finally, a finished product is fed onto a core head to be subjected to shaping drawing; the goal that the radius R of the circular corner is gradually reduced until the radius R conforms to the requirement is achieved; the outer dimension center part back arching is avoided; the inner dimension is enabled to conform to the requirements; the water seal decrustation processing mode is used in the extrusion process; the pipe blank surface oxidation can be prevented; the process processing process is reduced; the product quality is further ensured.

Description

technical field [0001] The invention relates to the technical field of nonferrous metal material processing, in particular to a process for preparing a red copper square tube material. Background technique [0002] Copper material has the characteristics of good thermal conductivity, high electrical conductivity, non-magnetism, corrosion resistance, high temperature resistance, and good processability, and is widely used in the field of heat conduction and electric conduction; the copper square tube is used as a tube for electric furnace, and has the advantages of high efficiency and energy saving. [0003] Special-shaped copper square tubes have special requirements: high tolerance precision of inner and outer diameters: ±0.10, and the ordinary national standard is ±0.25; at the same time, the radius of the inner and outer fillets is required to be R≤1mm, and the ordinary national standard is outer R≤4mm and inner R≤3mm. [0004] The copper square tube follows the tradition...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C37/06B21C3/04B21C3/16B21C29/00
CPCB21C3/04B21C3/16B21C29/003B21C37/06
Inventor 王强卢燕王峰李智利苏东东曹利温正杨海丽
Owner 中铝洛阳铜加工有限公司
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