Laser adjusting device and method for adjusting stress generated during laser additive manufacturing or remanufacturing

Abstract

The invention provides a laser adjusting device and a method for adjusting stress generated during laser additive manufacturing or remanufacturing. The laser adjusting device comprises a machining bin, a laser system for performing laser additive manufacturing / remanufacturing and laser stress control on workpieces placed in the machining bin according to pre-simulated process parameter sets, and agalvanometer for refracting to adjust machining positions, of laser used in the laser additive manufacturing / remanufacturing and laser used in the laser stress control, on the workpieces, wherein thelaser additive manufacturing / remanufacturing and the laser stress control are alternately performed in each machining point. In the laser additive manufacturing / remanufacturing process of the workpieces, the laser stress control is performed on the machining points by using low-power laser; and through a low-power-density laser heat effect, materials locally generate nonuniform heat stress. The heat stress is overlapped with the stress before adjustment to enable the materials to generate local plastic deformation, so that the effect of reducing and adjusting the stress is achieved.

Description

technical field [0001] The present invention relates to the field of laser additive manufacturing / remanufacturing, in particular to a laser control device that uses laser to eliminate stress at the current processing point during the process of laser additive manufacturing / remanufacturing of workpieces, and uses the laser control device to control A method for stress control of workpieces. Background technique [0002] Laser additive manufacturing / remanufacturing technology is derived from laser cladding technology, which can be effectively applied to quickly restore service performance of equipment parts and improve parts support capabilities. This technology uses metal powder as raw material, and uses a high-energy-density laser beam to clad and accumulate the powder sprayed on the metal substrate layer by layer, thereby forming / repairing metal parts. [0003] This physical process involves the non-equilibrium melting process, therefore, there is a certain residual stress...

AI Technical Summary

Problems solved by technology

However, the optimal process parameters corresponding to different molding parts are often different, so the optimization method is often difficult to implement, that is, it is difficult to ensure that the process parameters used are the global optimal parameters

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