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Bending method of large-diameter thin-wall aluminum pipe and die

A large-diameter, aluminum tube technology, used in forming tools, manufacturing tools, metal processing equipment, etc., can solve the problems of poor consistency of aluminum tubes, large deformation of the section at the bend, cracking, etc., to achieve good consistency and accurate bending position. Effect

Inactive Publication Date: 2014-04-30
BEIJING HANGXING MACHINERY MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, aluminum tubes with a diameter of more than Φ200mm and a wall thickness of ≥3mm are difficult to obtain by conventional stretch bending and numerical control bending methods, and are prone to defects such as wrinkling, crushing and cracking; the bent aluminum tube has poor consistency and the cross-sectional deformation at the bend Big

Method used

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  • Bending method of large-diameter thin-wall aluminum pipe and die
  • Bending method of large-diameter thin-wall aluminum pipe and die
  • Bending method of large-diameter thin-wall aluminum pipe and die

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Experimental program
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specific Embodiment approach

[0025] The specific implementation method is carried out according to the following process steps: the first step blanking: calculate the expanded size of the aluminum tube, such as figure 2 As shown in Fig. 1, use water cutting or numerical control punching method to place a single piece of flat blank and remove the incision burr; the second step is to circle: use a general-purpose circle machine to preform the sheet, and circle it into a straight cylinder with a theoretical arc radius; the third The first step of welding: the longitudinal seam of the straight billet is welded by argon arc welding to obtain the aluminum tube; the fourth step of heat treatment: the aluminum tube is annealed; the fifth step of filling the core material: the solid rosin is mixed with sand, and the ratio of sand to rosin is 1 : 3. After mixing evenly, pour it into the cylinder, heat the cylinder, melt the core material, and become one after cooling; the sixth step is bending and forming: use a sp...

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Abstract

The invention discloses a bending shaping method of a large-diameter thin-wall aluminum pipe and a die. The method comprises the steps of blanking, edge coiling, welding, thermal treatment, core filling, bending shaping, core removing and cleaning. The die comprises a die handle, an upper die, a lower die, a positioning plate and lifting bolts, wherein the die handle is connected with the upper die through a bolt; the upper die is arranged on a workbench; the positioning plate is connected with the lower die through a bolt; the lifting bolts are arranged on both sides of the upper die and the lower die. The die is simple in structure, convenient to operate, and accurate in the bending position.

Description

technical field [0001] The invention belongs to the field of pipe bending processing, and relates to a bending method and a mold of a large-diameter thin-walled aluminum pipe. Background technique [0002] More and more intake ducts are manufactured by superplastic forming technology of aluminum alloy sheets, and their commonality is large-diameter, thin-walled and complex-shaped cylindrical parts. Before adopting the superplastic forming technology to manufacture the air inlet, it is necessary to pre-bend the large-diameter thin-walled aluminum tube into an angle as the blank, and require the blank to have a smooth transition at the bend and a small cross-sectional deformation. At present, aluminum tubes with a diameter of more than Φ200mm and a wall thickness of ≥3mm are difficult to obtain by conventional stretch bending and numerical control bending methods, and are prone to defects such as wrinkling, crushing and cracking; the bent aluminum tube has poor consistency and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00B21D9/15B21D37/10
CPCB23P15/00B21C37/08B21D9/15B21D37/10
Inventor 刘萍王猛团孙彤石晓鹏
Owner BEIJING HANGXING MACHINERY MFG CO LTD
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