Optimization method for laser hot wire welding process

Abstract

The invention discloses an optimization method for a laser hot wire welding process. The optimization method for the laser hot wire welding process comprises the following steps: establishing a wire feeding speed-heating current-laser power three-dimensional coordinate system; in the three-dimensional coordinate system, surveying and mapping a critical process parameter combination for fusing transition and continuous transition to obtain an ideal process parameter window upper bound surface; in the three-dimensional coordinate system, surveying and mapping a critical process parameter combination for continuous transition and top wire transition to obtain an ideal process parameter window lower bound surface; according to the ideal process parameter window upper bound surface and the ideal process parameter window lower bound surface, determining an ideal process parameter window for the continuous transition of a welding wire; in the ideal process parameter window, selecting the process parameter combinations, and performing laser hot wire welding to achieve the continuous transition of the welding wire. In the optimization method for the laser hot wire welding process, the wire feeding speed, the heating current and the laser power are used as process parameters to control transitions of laser hot wire welding, and the ideal process parameter window is defined by the critical process parameter combinations, so that the optimization method for the laser hot wire welding process has the advantages of simplicity in parameter control, high easiness in operation and high practicality.

Description

technical field [0001] The invention belongs to the field of welding technology, and in particular relates to a method for optimizing a laser hot wire welding process. Background technique [0002] Such as figure 1 As shown, laser hot wire welding uses the resistance heat generated by the welding wire to heat the welding wire and then sends it into the molten pool formed by laser energy, which reduces the dependence of welding wire melting on laser energy, not only reduces the accuracy requirements of the relative position of welding wire and laser, Moreover, the filling efficiency is improved, and it is a promising laser filling wire welding technology. The wire transition behavior is affected by both resistance heat and molten pool heat, which is the core issue affecting the stability of the welding process and welding quality. The transition behavior of welding wire can be divided into three types: fusing transition, continuous transition and top wire transition, among ...

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Problems solved by technology

[0003] The invention aims to solve the technical problem in the prior art that the laser hot wire welding may be a fusion transition or a top wire transition, resulting in poor welding quality

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