Heat conjunction metal board laser forming method

A metal plate and laser forming technology, which is applied in laser welding equipment, metal processing equipment, welding equipment, etc., can solve the problem of small deformation in a single scan, and achieve the effect of improving forming efficiency and large application prospects

Inactive Publication Date: 2008-06-25
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology

[0003] In order to overcome the problem of small deformation in a single scan of laser thermoforming of metal sheets, the present invention provides a method of laser forming of me

Method used

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  • Heat conjunction metal board laser forming method

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Embodiment Construction

[0009] Specific embodiments of the present invention will be described below in conjunction with the accompanying drawings. The thermomechanical combined metal plate laser forming device consists of control system 1, CO 2 Laser 2, mirror 3, focusing mirror 4, pressure output system 9, fixture 8, three-dimensional numerical control table 7 and formed workpiece 6, as shown in Figure 1.

[0010] First of all, in order to prevent the oil dirt on the surface of the metal plate from affecting the heat transfer, all the plates were cleaned with acetone. Due to the choice of CO 2 The laser wavelength generated by the laser is 10.6 μm, and the absorption rate of low carbon steel is very low. In order to improve the absorption coefficient of the laser, a layer of coating is uniformly coated on the metal surface for blackening treatment. Then, the workpiece with a length of L, a width of W, and a thickness of H is placed on the three-dimensional numerical control table 7, and one end o...

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Abstract

The invention relates to a laser forming method for a thermally combined metal plank. A work-piece is arranged on a three dimensional numerical control platform and one end is fixed. A continuous laser bean heats the surface of the metal plank at a certain scanning speed along a given moving track and force is applied at the location of about 1 to 3 spot diameters after the laser bean. As an elasticity modulus and an off set limit of the metal plank is greatly descended under a thermal state, the uneven heat stress caused by heating part of the work-piece by the laser bean is combined with a crushing stress to lead the plank to generate a larger elasticity modulus; thereby improving the forming efficiency of the plank. The method is not only suitable for the normal metal plank, but also can be applied to the forming of high-hard brittle difficult-deforming materials; the invention has a promising application in the manufacturing field of aerospace, micro-electronics and ships.

Description

technical field [0001] The invention relates to a laser forming method for a metal sheet material combined with thermal force, in particular to the field of sheet material forming, and is suitable for dieless rapid forming of a metal sheet material or sheet metal orthopedics. technical background [0002] Laser thermoforming of sheet metal is a flexible moldless local thermoforming technology. It uses a laser beam to locally heat the workpiece to induce uneven thermal stress. If the unevenness of heating is sufficient to cause the thermal stress to exceed the yield at the corresponding temperature At the limit, the sheet will be plastically deformed to achieve the desired target shape. Laser thermoforming is moldless and requires no external force, so the production cycle is short and flexible, and it is suitable for small batch production of parts; because it is not limited by molds, it can form various components; laser thermoforming belongs to thermal accumulation forming...

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Application Information

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IPC IPC(8): B23K26/00
Inventor SHI YONGJUNLIU FENGLIU YANCONGMA JIANMINYUN PINGLI
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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