Forming treatment of metal plates and disks by local laser heating
DOI:
https://doi.org/10.15587/1729-4061.2013.14484Keywords:
Laser forming, plate materials, deformation, thermal method of forming, heat-affected zoneAbstract
The article is devoted to the study of thermal methods of forming. Namely, the laser forming, as the laser as a thermal source is stable, well defined, bases easily, and provides a locality heating. The mechanisms of laser forming were analyzed. The results of experimental studies were presented. It was found that the amount of deformation is proportional to the number of irradiation cycles for both carbon and austenitic stainless steels. When processing carbon steels the "post-deformation" occurs. It may or may not be coincident with the direction of the main deformation. The resistance of the laser formed constructions was studied. It was shown that the resistance of the constructions formed with the laser to force and thermal load is higher than of the constructions formed by the pressure treatment.
This is explained by the fact that the pressure treatment in the processing zone causes wall thinning of an item, in turn, the laser forming causes the reverse process - thickening. Technological recommendations on the treatment of metal plates were worked out. The results of the forming of items of complex spatial configuration with the irradiation by the parallel and cross laser passages were presented.
It was found that during the irradiation along the curvilinear trajectories it is appropriate to use a uniform heating, which can be achieved by rotating a workpiece with a frequency of 11000 rotations in a minute. The uniform heating of the workpiece in a closed curvilinear contour allows a uniform distribution of stresses and strainsReferences
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