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Simple bending method of large-diameter thin-walled aluminum tube

A large-diameter, aluminum tube technology, applied in the field of tube bending processing, can solve the problems of shortening the manufacturing cycle, prone to wrinkling, cracking, etc., and achieve the effects of short processing cycle, avoiding process exploration, and reducing costs

Active Publication Date: 2013-01-16
BEIJING HANGXING MACHINERY MFG CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of wrinkling, crushing and cracking in the bending process of thin-walled aluminum tubes, shorten the manufacturing cycle and reduce the manufacturing cost, and propose a simple bending method for large-diameter thin-walled aluminum tubes

Method used

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  • Simple bending method of large-diameter thin-walled aluminum tube
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  • Simple bending method of large-diameter thin-walled aluminum tube

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specific Embodiment approach

[0053] The specific embodiment is carried out according to the following process steps:

[0054] The first step of blanking: Calculate the expanded size of the large-diameter thin-walled aluminum tube (hereinafter referred to as the aluminum tube) to be processed, and use the CNC punching method to place a single blank with a size of 672.3mm×1150mm, such as figure 2 As shown, remove the burr.

[0055] The second step is to circle: Use a circle machine to circle the flat blank into a round tube blank, allowing opening or overlapping, avoiding welding and assembly gaps, the size is Φ214mm×1150mm, such as image 3 shown.

[0056] The third step of welding longitudinal seam: Pickling the round tube blank before welding, cleaning it and drying it in a drying furnace at 100-150°C for 20-30 minutes; using a wire brush and a scraper to polish the welding area to remove burrs, And clean it with acetone, keep the welding area clean before welding; assemble the workpiece on the univer...

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Abstract

The invention discloses a simple bending method of a large-diameter thin-walled aluminum tube. The simple bending method includes the steps of firstly, filling core material, namely mixture of melted rosin and fine sand, into the large-diameter thin-walled aluminum tube; secondly, cooling the large-diameter thin-walled aluminum tube after the core material is filled in; thirdly, performing stretch bending to the cooled large-diameter thin-walled aluminum tube to form a bent tube by a stretch bender; fourthly, removing the core material filled in the bent tube; and fifthly, washing the bent tube. Simple bending of the large-diameter thin-walled aluminum tube is achieved by the method, and the bent tube formed by the method is high in precision and small in section distortion and overcomes the defects of wrinkle, crushing, cracking and the like compared with that in a bending forming process without filling. Compared with a numerical-control bent tube process, the method is simple in bent condition, simple to operate and short in processing period, reduces costs of using a special numerical-control tube bender and manufacturing a bent tube mould and avoids a large amount of process exploration and repeated mould repairing.

Description

technical field [0001] The invention belongs to the field of pipe bending processing, and relates to a simple bending method of a large-diameter thin-walled aluminum pipe, which is suitable for simple and efficient bending of large-diameter deformed aluminum alloy thin-walled pipe fittings. Background technique [0002] Deformed aluminum alloy has outstanding advantages such as low density, high specific strength, high plasticity, and corrosion resistance. It is a commonly used structural material in the field of pipe bending (aluminum alloy pipe is referred to as aluminum pipe for short). Aerospace elbow parts are developing in the direction of lightweight and large-scale, and large-diameter thin-walled elbows made of deformed aluminum alloys are becoming more and more widely used. At present, it is difficult to obtain bends with a diameter of more than Φ150mm and a diameter-thickness ratio of more than 50 by conventional stretch bending and CNC bending, and are prone to de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D9/08B21C37/08
Inventor 孙燚史科李保永刘洋郭晓琳李强
Owner BEIJING HANGXING MACHINERY MFG CO LTD
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