Optimization method for laser hot wire welding process
A technology of process optimization and hot wire welding, applied in laser welding equipment, welding equipment, manufacturing tools, etc., can solve problems such as poor welding quality, and achieve the effects of easy operation, strong practicability, and simple control parameters
Active Publication Date: 2014-02-12
TSINGHUA UNIV
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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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[0023] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.
[0024] The problem to be solved by the present invention is to provide a laser hot wire welding process optimization method that can realize the continuous transition of the laser hot wire welding welding wire. The method proposes a process parameter window for realizing the continuous transition of the welding wire, and the process parameter window can be used to control It can also be used to judge the wire transition behavior under a certain combination of process parameters.
[0025] In order to make those skilled in the art ...
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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 ...
Claims
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Login to View More IPC IPC(8): B23K28/02
CPCB23K26/20B23K26/702
Inventor 温鹏郑世卿单际国
Owner TSINGHUA UNIV