Metal welding rapid formation system and method based on CMT

Abstract

The invention discloses a metal welding rapid formation system and method based on CMT. The metal welding rapid formation system comprises an industrial personal computer for generating the path code information of welding formation, a CMT welding expert system for conducting inference and obtaining conclusion according to the rules in a collecting data matching knowledge base and converting the conclusion into the feedback control signals for closed-loop control, a CMT welding device for piling up and forming the objective formation parts; a structured light visual sensor for conducting the surface topography measurement on the piled formed welding pass, an image capture card for processing the signals collected by the structured light visual sensor and an infrared thermometer for measuring the surface temperature of the piled welding pass. Through the measurement of the temperature and the surface topography of the welding formation welding passes, a welding formation expert system, a formation height and width feedback system and a temperature detection feedback system are established, the closed-loop control of the CMT metal welding rapid formation is realized, and the precision and the quality of formation is ensured.

Description

【Technical field】 [0001] The invention relates to the field of welding rapid prototyping, in particular to a metal welding rapid prototyping system based on cold metal transition technology (CMT), which can realize online detection and feedback. 【Background technique】 [0002] Metal welding rapid prototyping technology is a rapid prototyping technology that combines metal welding technology and rapid prototyping discrete accumulation principle. The 3D CAD solid model of the target part is obtained through 3D solid scanning or direct modeling, and the model is pressed along a certain coordinate direction. A certain thickness is sliced ​​in layers, and then the metal wire is melted by the welding arc, and each thin layer is formed according to the established forming path, and the layers are accumulated to form an advanced manufacturing technology of three-dimensional solid parts. Compared with the current rapid prototyping technology, metal welding rapid prototyping technolog...

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Problems solved by technology

[0003] At present, the research on metal welding rapid prototyping technology is not deep enough, and there are still many problems in practical application.

In terms of technology, the forming accuracy of welded formed parts is low, the surface quality is poor, the roughness is large, and the process is unstable

In terms of forming system: the accuracy and reliability of the system are not high, and the forming system does not have a closed-loop control function; the system has a large heat input, which is easy to cause deformation of the formed part, and does not have a temperature detection and feedback system

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