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Aluminum alloy tubing straightening method and special fixture thereof

A special fixture and aluminum alloy technology, which is applied in the direction of forming tools, manufacturing tools, metal processing equipment, etc., can solve the problems of not being able to ensure that aluminum alloy pipes will not be flattened, and achieve the effect of ensuring straightening quality and improving tensile strength

Inactive Publication Date: 2005-12-07
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, this method has not been used on aluminum alloy pipes, even if this method is adopted, it cannot ensure that the aluminum alloy pipes will not be crushed

Method used

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  • Aluminum alloy tubing straightening method and special fixture thereof
  • Aluminum alloy tubing straightening method and special fixture thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The outer diameter of the aluminum alloy pipe is 20mm, the wall thickness is 1.6mm, and the length is 2000mm. After heat treatment, the deflection of the aluminum alloy pipe is 2.0mm / m, and the yield strength is 290kg / cm 2 .

[0017] Be contained on the drawing machine 2 with the special clamp 1 that the present invention provides, as figure 1 As shown, the special clamp (as shown in Figures 2 and 3) is made up of frame 11, jaw teeth 12, guide plate 13, fixed briquetting block 14, screw rod 15, movable briquetting block 16, plug head 17 and spring assembly 18. The fixed briquetting block 14 is directly fixed on the frame 11, and the movable briquetting block 16 is mounted on the frame 11 by a screw rod 15. The position of the movable briquetting block is opposite to the fixed briquetting block 14, and the frame 11 is also fixed with a guide plate 13, which not only limits the movable briquetting block 16 rotates and guides the moving direction of the movable briquetti...

Embodiment 2

[0022] The outer diameter of the aluminum alloy pipe is 50mm, the wall thickness is 2.5mm, and the length is 7000mm. The deflection of the aluminum alloy pipe after heat treatment is 0.2mm / m, and the yield strength is 290kg / cm 2 . Installation and drawing method on drawing machine 2 are the same as embodiment 1. The drawing set was 2.0%. The deflection after drawing is 0.12~0.08mm / m, and the yield strength is 396kg / cm 2 , tensile strength up to 506kg / cm 2 .

Embodiment 3

[0024] The outer diameter of the aluminum alloy pipe is 25mm, the wall thickness is 1.8mm, and the length is 3000mm. The deflection of the aluminum alloy pipe after heat treatment is 0.5mm / m, and the yield strength is 290kg / cm 2 . Installation and drawing method on drawing machine 2 are the same as embodiment 1. The drawing set was 1.0%. After drawing, the deflection is 0.22~0.15mm / m, and the yield strength is 358kg / cm 2 , tensile strength up to 491kg / cm 2 .

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Abstract

The invention provides an aluminum alloy pipe and tube alignment method which has the following characters: fixing the aluminum alloy pipe and tube on the coil winder by special tool to do lighten drawing to align the pipe and tube, improve the its strength of extension, rounding off the distorting parts of both extremities after aligning it. The special tool has the following characters: it is formed by frame, fixing bloke with clamp teeth, active block with clamp teeth, latch and baffle wall, wherein fixing bloke with clamp teeth is fixed on the frame; the active block with clamp teeth is fixed on the frame by latch and is opposed faced to fixing bloke with clamp teeth; baffle wall is used to stuff the extremities of aluminum alloy pipe and tube so that it can not be squeezed.

Description

technical field [0001] The invention relates to a method for straightening aluminum alloy pipes. Background technique [0002] Aluminum alloy pipes often produce bending deformation after heat treatment, so they need to be straightened. Existing pipe straightening method all adopts to straighten with roller after being filled with sand in the pipe. Have not seen so far that this method is used on the aluminum alloy pipe material, even if adopt this method also can not guarantee that the aluminum alloy pipe material is not crushed. Contents of the invention [0003] The purpose of the present invention is to provide a simple straightening method for aluminum alloy pipes which not only ensures the straightening quality. [0004] The invention provides a method for straightening aluminum alloy pipes, which is characterized in that: the aluminum alloy pipes are mounted on a drawing machine 2 through a special fixture 1 for micro-drawing, so as to realize straightening, and a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D3/00
Inventor 高杰苏国跃
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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