Laser additive manufacturing system based on closed-loop control and method of laser additive manufacturing system

Abstract

The invention provides a laser additive manufacturing system based on closed-loop control and a method of the laser additive manufacturing system. The laser additive manufacturing system comprises anoptical measuring system, an image processing system, a feedforward controller, a first comparison module, a PID control unit, a second comparison module, an LPD process module and a measuring transmission module. A closed-loop control system with high reference tracking and anti-jamming capacity is adopted, the dimensional precision in the laser cladding process is improved, meanwhile, an image recognition algorithm is developed, a foundation is laid for intelligent repair path planning, process parameter optimization and quality control, reference is provided for actual application of a laser cladding technology, the production efficiency can be improved in an actual production line, the cost is reduced, and good economic benefits can be obtained.

Description

technical field [0001] The invention relates to laser cladding, in particular to a closed-loop control-based laser additive manufacturing system and method thereof. Background technique [0002] Laser cladding additive repair is an additive manufacturing process that uses high-energy laser beams as a heat source to melt the required metal and then deposits it layer by layer on the surface of the substrate. It can be used to make products with complex shapes, or to repair worn parts. Since the parts manufactured by the laser powder deposition process have the advantages of net shape, small heat-affected zone, excellent microstructure, and good mechanical properties, it is more and more widely used in the industry. However, the process is sensitive to changes in many process parameters and other environmental disturbances, which will lead to process errors. And in order to improve the efficiency of the automation process, people have done a lot of work on the development of ...

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Problems solved by technology

The purpose of the present invention is to provide an experimental method of laser additive manufacturing based on closed-loop control to at least solve the difficulty of shape detection before and after the repair of the workpiece, the difficulty of automatically generating repair processing paths, and the parameter changes and environmental interference during laser cladding and additive repair. , the technical problem that the open-loop system cannot guarantee the good quality of the cladding

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