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Progressive bending sheet metal

A sheet metal bending technology, which is applied in the field of continuous bending sheet metal, can solve problems such as difficult implementation, complicated conditions, and difficult deformation

Active Publication Date: 2015-06-03
宁波市博祥新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in the process of processing, the induced thermal stress must exceed the yield limit of the material before the plate can be deformed. Therefore, the plate needs dozens or even hundreds of reciprocating scans. During so many heating scans, heat accumulation and material deformation , performance changes and many other factors make it difficult to control the deformation of the material, and it is not easy to realize, especially the continuous bending deformation of the material requires multi-pass reciprocating scanning operations on the material, and the situation is more complicated

Method used

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Embodiment

[0020] A 0Cr18Ni9 stainless steel sheet with a thickness of 0.15mm is used as the workpiece to be processed. The length of the sheet is 25mm (the actual part to be processed is about 20mm) and the width is 5mm. The interval between passes was set to 2 mm, and thus a total of 10 passes were scanned, and each pass was reciprocally scanned 10 times. After the surface of the workpiece to be processed is polished with corundum sandpaper to remove foreign matter, the surface is pretreated with black paint, and then the thin plate is pressed between two glass plates. Set the diameter of the laser beam spot to 0.1mm, the power to 22W, and the scanning speed to 18mm, and proceed in the order of scanning from both ends of the thin plate to the center. After scanning, the processed workpiece is left to cool naturally at room temperature, the fixture is removed, and the processed workpiece is taken out for measurement and verification. The measured curvature of the thin plate is about 0.0...

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Abstract

The invention provides a progressive bending sheet metal which is manufactured with the method of laser bending forming. According to the laser bending forming method, proper and unique technological parameters are chosen, deformation of the sheet metal is controlled accurately, and the progressive bending sheet metal is obtained at last. Interval between passes of the sheet metal is preferred to be 1.5-2mm, and reciprocating scanning time of each pass is preferred to be 10 times, diameter of a laser beam spot is 0.1mm, power is 20-25W, scanning speed is 15-20mm, and curvature of the sheet metal obtained at last is about 0.05-1mm.

Description

technical field [0001] The invention relates to a metal plate, in particular to a continuously bent metal plate obtained by laser bending forming. Background technique [0002] The forming process of sheet metal occupies a considerable proportion in aviation, aerospace, automobile, shipbuilding and civil industries. For example, the number of plate forming parts accounts for 1 / 2 of the total number of aircraft parts. According to statistics, more than half of the materials produced in the world are processed into plates. Therefore, improving the corresponding forming technology and manufacturing level is a subject of universal significance. [0003] The core issues of modern sheet metal forming technology are concentrated in the aspects of simplifying design, improving quality, shortening cycle and reducing cost. Traditional forming technology usually needs to manufacture corresponding tools and molds according to the shape of the plate, which not only takes a lot of time ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21D5/00
Inventor 胡竞之
Owner 宁波市博祥新材料科技有限公司
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