Method of making aluminum clad copper tube with metallurgical bonding

A manufacturing method and metallurgical combination technology, applied in the field of metal composite pipe manufacturing, can solve the problems of long pipes, high cost, leaking weld defects, etc., and achieve the effects of good product quality, stable process and stable process flow

Inactive Publication Date: 2011-12-21
JIANGSU XINGRONG HI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to solve the problems or one of the problems in the existing aluminum-clad copper pipe manufacturing technology, such as high cost, inability to produce relatively long pipes, easy leakage, and easy crackin

Method used

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  • Method of making aluminum clad copper tube with metallurgical bonding
  • Method of making aluminum clad copper tube with metallurgical bonding

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Experimental program
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Effect test

Embodiment 1

[0065] 1) A horizontal extrusion machine is used to extrude Φ48×3mm aluminum tubes, the material is 3003, and the aluminum coils are harvested online after extrusion, and then the aluminum coils are straightened and cut to length, with a length of 150m. The rear specification is Φ40×0.6mm.

[0066] 2) Brush the inner surface of the aluminum tube, using a steel wire brush, put multiple steel wire brushes in series into the aluminum tube, and brush the inner surface repeatedly; also brush the outer surface of the copper tube.

[0067] 3) The copper pipe after brushing the outer surface is directly threaded into the aluminum pipe online to obtain a tube blank of an aluminum-clad copper tube. The total weight of the tube blank after piercing is about 270kg.

[0068] 4) Multi-pass linear drawing of the tube blank to Φ19.05×0.9mm, the deformation rate at this time is 89%.

[0069] The weight-to-total weight ratio of copper in the aluminum-clad copper tube is 36.8%, and the average ...

Embodiment 2

[0072] 1) A continuous extrusion machine is used to extrude a straight aluminum tube of Φ60×2.5mm. The material is pure aluminum. It is straightened on-line during extrusion. The length of the aluminum tube is 200m. The seamless copper coil tube is prepared by planetary rolling. Specifications It is Φ50×1.5mm.

[0073] 2) Clean the inner surface of the aluminum tube straight tube.

[0074] 3) After the copper tube is uncoiled and straightened, the bristles on the outer surface are directly penetrated into the aluminum tube on the line to make a tube blank of an aluminum-clad copper tube.

[0075] 4) Expand the aluminum-clad copper tube blank to Φ61×3.9mm.

[0076] 5) After multi-pass continuous straight drawing, coil drawing and annealing, it is processed to Φ9.52×0.4mm and finally softened and annealed to obtain the finished product.

[0077] According to the aluminum-clad copper tube produced in this embodiment, the thickness of the copper layer is 36% relative to the thic...

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Abstract

The invention provides a method for manufacturing an aluminum-clad copper tube with metallurgical bonding, comprising: A, preparing a copper tube and an aluminum tube straight tube, and the aluminum tube straight tube is an aluminum tube extruded by an extrusion machine; B, The inner surface of the straight aluminum tube is treated, and the outer surface of the copper tube is treated; C, the copper tube is penetrated into the straight aluminum tube to obtain an aluminum-clad copper tube blank, and the copper-to-total weight ratio does not exceed 80%; D, The aluminum-clad copper tube billet is processed and annealed for diameter reduction and wall reduction in the subsequent pass, and the total deformation rate is controlled to be above 60%, so as to obtain a finished product of the aluminum-clad copper tube. The manufacturing method of the aluminum-clad copper pipe provided by the present invention adopts an extrusion machine to manufacture straight aluminum pipes without welded pipe welds, and can withstand mechanical processing without cracking. Straight tubes can manufacture large and heavy aluminum-clad copper tubes, and because of the post-pass diameter reduction and wall reduction processing and annealing and control of deformation rate, the copper-aluminum interface metallurgical bonding is stable, the process flow is stable, and it is suitable for mass production.

Description

technical field [0001] The invention relates to the field of manufacturing metal composite pipes, more specifically, to a method for manufacturing aluminum-clad copper pipes. Background technique [0002] Aluminum-clad copper tubes have been gradually applied in the field of refrigeration and air conditioning. Some recent application results show that compared with traditional copper tubes, aluminum-clad copper tubes have higher heat dissipation efficiency in the field of household air-conditioning. Air conditioners made of aluminum tubes have a higher energy efficiency ratio. It is believed that as the technology becomes more mature, it is entirely possible for aluminum-clad copper tubes to partially replace copper tubes. [0003] Patent CN200610076037 discloses a copper-aluminum composite pipe manufacturing method and the copper-aluminum composite pipe manufactured by the method. The patent uses a planetary rolling mill to process the copper-aluminum composite pipe billet ...

Claims

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Application Information

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IPC IPC(8): B21C37/06
Inventor 祁威田福生陆正良曹海斌熊云峰
Owner JIANGSU XINGRONG HI TECH
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