Laser-electric arc compound welding gun

Abstract

The invention discloses a laser-electric arc compound welding gun which is characterized in that the welding gun respectively adopts ball screw linear guide rail mechanisms driven by three stepping motors or servo motors to precisely adjust the space positions of a laser focal point and an electric arc electrode along x, y and z three right-angle coordinate axis directions, and meanwhile, a gear pair rotation adjustment mechanism driven by one stepping motor or one servo motor to enable the electric arc electrode to freely rotate around the axial line of a laser beam within a 360-degree range; furthermore, by additional arrangement of an electromagnetic anti-splashing device fed with high-frequency alternating current, the compound welding gun controls a moving path of welding splashing under the mutual action between a magnetic field and a vortex, so that pollution caused by the welding splashing to a laser optical system and an electric arc welding gun protection system can be reduced. Due to the structural design, the compound welding gun disclosed by the invention can meet the requirements on efficient digitalized welding of complicated parts and manufacturing of complicated part additives.

Description

technical field [0001] The invention belongs to the technical field of material processing, and in particular relates to a laser-arc composite welding torch. Background technique [0002] With the increasing requirements for weight reduction and strength in the industrial field, the proportion of complex structural parts or large structural parts is getting higher and higher, such as the application of ship surface segmental members, aircraft "sandwich" structural plates, etc. . In the manufacture of complex parts, welding and 3D additive manufacturing technology will become the main processing methods in the future. In view of the characteristics of high efficiency, high performance, and high automation, the laser-arc composite heat source has broad application prospects in the fields of welding and 3D additive manufacturing. However, in laser-arc hybrid welding or 3D additive manufacturing, it is necessary to adjust the laser focus and arc electrode spatial attitude in r...

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Problems solved by technology

[0003] In order to effectively solve the above problems, many attempts have been made in this field: such as Fujian Weide Technology Co., Ltd. developed a laser hybrid welding equipment (CN201110203565.6), which involves the adjustment of the spatial position of the laser welding torch and the arc welding torch, but the device It can only meet the linear adjustment of the relative position of the laser welding torch and the arc welding torch before welding, but it is difficult to meet the real-time adjustment requirements of the laser focus and the space attitude of the arc electrode in the welding process; such as Tsinghua University has developed a laser-arc coaxial composite welding torch (CN03109130 .X), which can solve the problem that the welding quality is affected by the welding direction due to the asymmetry of the heat source during laser-arc paraxial hybrid welding, but it is difficult to realize commercial application due to the complex processing technology of the arc electrode

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