Laser and blast compound forming method based prestress force

A compound forming and prestressing technology, which is applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problems of difficult manufacturing automation and damage left on the surface of workpieces, and overcome the damage or even destruction of formed parts, deformation resistance The effect of reducing and improving the forming effect

Inactive Publication Date: 2008-10-22
INST OF MECHANICS - CHINESE ACAD OF SCI
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Problems solved by technology

However, "manual hammering" and "pimp whipping" often rely on the experience of the processor, and it is not easy to realize manufacturing a...

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  • Laser and blast compound forming method based prestress force

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Embodiment Construction

[0015] A laser and shot-peening composite forming method based on prestress in the present invention can be divided into parameter simulation preparation process, processing process and feedback adjustment process, wherein the parameter simulation process is specifically: first establish the mechanical properties and thermal properties of the forming material, etc. Relevant performance parameters and the structure, size and shape database of formed parts, as well as the response law of materials under the action of multi-physics fields (mechanical load, thermal load), establish a computing platform and an expert system. And use the computing platform to pre-judge the virtual processing of the blank, the position that is difficult to form and needs laser processing, the laser processing parameters, and the shot peening processing area and parameters, that is, the laser technology is obtained through the simulation of the processing process. Parameters, areas and trajectories tha...

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Abstract

The invention discloses a composite forming method of laser and shot peening on the basis of pre-stress, which is characterized in that virtual process is firstly carried out by a blank piece so as to gain all parameters in the machining process; during the processing, a temperature field is formed at a difficult-deformation area by the laser; when the laser is used for scanning, the local shot peening disposal leads the surface at the other side of the stiffener to generate tensile plastic deformation; when the method of the invention is adopted for forming, the thermal energy converted by the laser energy can reduce the deformation resistance of the material in the laser function area, and can lead the surface to generate larger plastic deformation and improve the forming quantity by raising the temperature of the whole processing of the blank piece little.

Description

technical field [0001] The invention relates to the field of sheet metal forming, in particular to a laser and shot-peening composite forming method based on prestress. Background technique [0002] There are such types of sheet metal parts in engineering, such as aircraft skin and overall (integrated skin and support ribs) panel parts, rocket integral fuel tank parts, ship side and deck parts, and car coverings, etc. , It needs to be formed by bending or rolling (another form of bending, the formed part can be rotated with the support roll while being bent). [0003] Bending forming is the main method of integral panel forming at present. The method utilizes a three-point bending method to form an integral wall plate, and the wall plate is supported by two support points, and a loading device controls a pressure head to load on a predetermined position on the wall plate. The siding deforms plastically under the load to achieve the desired geometry. Press bending forming ...

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Application Information

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IPC IPC(8): B21D31/00B21D31/06G06F17/50
Inventor 彭青陈光南罗耕星吴臣武王秀凤
Owner INST OF MECHANICS - CHINESE ACAD OF SCI
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