Laser preheating machining system integrated with temperature field real-time measuring and feedback control functions

Abstract

The invention discloses a laser preheating machining system integrated with temperature field real-time measuring and feedback control functions. The system comprises a coaxial infrared temperature measuring laser head, a three-freedom-degree controllable clamp, a laser device, a laser device control unit, a clamp control unit, a data processing unit and a feedback adjusting unit. The system aims at comprehensively considering multiple factors affecting the surface temperature field of a laser preheated workpiece, real measurement temperature and preset target temperature are input to the data processing unit, a trained BP neural network model is optimized to be subject to data processing, laser power and compensation amount of three freedom degrees of the controllable clamp are output to the feedback adjusting unit, the compensation amount is loaded to the laser device and the controllable clamp to properly adjust the laser output power and the spot size and energy density, on the surface of the workpiece, of laser, and the surface of the preheated workpiece accurately reaches the preset target temperature. The system is high in automation degree, high in temperature feedback control precision, good in safety property and convenient to operate.

Description

technical field [0001] The invention relates to the fields of preheating auxiliary processing, temperature measurement and feedback control, and more specifically, relates to a laser preheating processing system integrating real-time measurement of temperature field and feedback control functions. Background technique [0002] With the rapid development of industrial technology in aviation, aerospace, navigation and other fields, the demand for high-performance product components is increasing, and various high-hardness and high-strength engineering materials are emerging. But at the same time, the improvement of material properties also brings new problems to machining and manufacturing. For example, high-temperature alloys have excellent high-temperature strength, good oxidation resistance and hot corrosion resistance, and good fatigue resistance and fracture toughness, etc., but if they are processed by conventional cutting methods, not only the tool wear is serious, but ...

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Problems solved by technology

[0006] Aiming at the deficiencies of the prior art, the present invention provides a laser preheating processing system integrating real-time temperature field measurement and feedback control functions, which is used to solve the problems of complex profiles, the position state of the laser relative to the workpiece surface, and the Given the influence of factors such as speed and laser power on the temperature field of the workpiece surface, to ensure that the temperature field of each pre-hot spot on the workpiece surface remains consistent and stable during the laser preheating process

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