Laser DED manufacturing control system and method fusing temperature and image information

Abstract

The invention relates to a laser DED manufacturing control system and method fusing temperature and image information, the system comprises an embedded module, a laser DED manufacturing system, a temperature sensing module, a visual sensing module and a PID control module, and the laser DED manufacturing system, the temperature sensing module, the visual sensing module and the PID control module are all connected with the embedded module. Compared with the prior art, a molten pool overflow threshold calculation algorithm based on the contour of the molten pool is used to obtain a dimensionless number to represent the overflow degree of the molten pool, and the dimensionless number is used as a parameter supervisor of the PID control module; an analog quantity signal of the temperature is used as a feedback value of the PID control module; a PID control algorithm with a parameter supervisor is used, the advantages of visual reflection of images on cladding layer forming and high-speed response of temperature on the physical phenomenon of a molten pool are combined, multivariable control of the temperature and image information of the molten pool on cladding layer forming quality is achieved, and a new technical approach is provided for real-time control of laser DED manufacturing forming.

Description

technical field [0001] The invention relates to the technical field of laser DED manufacturing quality control, in particular to a laser DED manufacturing control system and method for fusing temperature and image information. Background technique [0002] In the process of laser DED manufacturing, it is impossible to achieve true repeatability and determinism even if the process parameters are kept constant. This is due to the reaction between the laser and the powder during the laser DED process, accompanied by rapid temperature field changes and rapid solidification. In addition, it is affected by uncertain conditions such as the particle size distribution of the powder particles and the heat transfer conditions of the substrate. Only with advanced monitoring methods can the quality stability and consistency of laser DED manufacturing components be guaranteed. However, the existing methods mainly monitor the laser DED manufacturing process through temperature and image s...

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the problems in the above-mentioned prior art that only based on the temperature information, it is necessary to rely on the finite element model or the numerical analysis model to establish the relationship with the shape parameters of the component, and the organization and performance of the component cannot be intuitively reflected only based on the image information. To provide a laser DED manufacturing control system and method that fuses temperature and image information

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