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Method for forming arc groove in metal plate by adopting laser flexible bending forming technology

A metal plate, bending forming technology, applied in the field of mold-free flexible forming, laser flexible bending forming arc groove, can solve the problems of high forming cost, difficult fast manufacturing, difficult and other problems, and achieve easy flexible manufacturing and save mold manufacturing Cost, the effect of rapid manufacturing

Inactive Publication Date: 2017-10-24
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the high cost and difficulty of traditional arc groove mold bending and forming, and the characteristics that it is not easy to manufacture quickly, the present invention adopts a method of laser flexible bending and forming arc groove of metal sheet

Method used

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  • Method for forming arc groove in metal plate by adopting laser flexible bending forming technology
  • Method for forming arc groove in metal plate by adopting laser flexible bending forming technology
  • Method for forming arc groove in metal plate by adopting laser flexible bending forming technology

Examples

Experimental program
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Effect test

Embodiment 1

[0020] Embodiment 1: A single-curvature arc groove sample is formed by laser bending of a metal plate.

[0021] (1) Use a shearing machine to cut the metal composite plate with a thickness of 1mm into a rectangular sample with a width of 50mm and a length of 100mm;

[0022] (2) Use the fixture to clamp one end of the sample and place it on the laser processing table, adjust the laser power to 140w, the frequency to 40Hz, the pulse width to 2ms, and the laser scanning speed to 400mm / min, and then figure 2 At path 1, starting from point 1 outside the edge of the plate, scan and bend back and forth along the circular arc path. In order to stabilize the laser light source during plate processing, reserve a vacant distance, and point 1 outside the edge is 3mm away from the plate. The laser scanning arc radius R is 50mm, the laser reciprocating scanning is 20 times in total, the side blowing auxiliary gas N2, the blowing pressure is 0.2MPa, and cooling is 10s after each scanning; ...

Embodiment 2

[0026] Example 2: Laser bending forming of a metal plate with two arc-shaped grooves in opposite directions of curvature.

[0027] It is different from Example 1: step (1) utilizes a shearing machine to cut the metal composite plate sheet material with a thickness of 1mm into a rectangular sample with a width of 80mm and a length of 100mm;

[0028] The second difference from Embodiment 1: the laser bending scanning path is different. In Example 2, the laser scanning path is two arcs with opposite curvature directions, such as image 3 As shown, the radius of the arc is 50mm, and the other steps are the same as in Example 1.

[0029] According to the results of Examples 1 and 2, the shape of the groove of the forming sample can be generalized for forming complex curved grooves such as B-spline curves.

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Abstract

The invention provides a method for forming an arc groove in a metal plate by adopting a laser flexible bending forming technology. The method can be used for rapid bending forming of groove structures of single arc lines, different arc combined lines and the like of metal plates. According to the method, on the basis of a temperature gradient mechanism, when a laser scans the metal plate, a laser scanning line region can generate an obvious temperature gradient along the laser scanning paths and then can generate the non-uniform thermal stress distributed along a scanning line so that three-dimensional curved surface deformation of the plate can be generated; and the arc groove is formed according to the expected shape, the shape of the laser scanning line, all the laser parameters of each scanning path and the laser scanning frequency of each path are changed, proper path planning is combined, and therefore rapid high-precision laser bending forming of arc grooves of different types can be realized.

Description

technical field [0001] The invention belongs to the technical field of laser bending and forming of metal plates, in particular to a method for laser flexible bending and forming of arc grooves, which can be used for mold-free flexible forming of various arc groove-shaped bulkheads. Background technique [0002] The mold-free flexible processing of various arc groove bulkhead parts has always been a difficult point in processing and forming. Compared with the traditional mold processing method, laser bending forming is a flexible, moldless, no external force, non-contact rapid prototyping technology, which is easy to realize automation, easy to carry out flexible design of laser bending scanning path, and can realize complex shapes directly Bending forming, using laser bending forming technology to plan the laser bending scanning path, can realize moldless and rapid bending forming of various grooves such as single arc and different arc combinations, suitable for single piec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D11/20
CPCB21D11/20B21D17/00
Inventor 王续跃王高烽李紫慧
Owner DALIAN UNIV OF TECH
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