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Laser tungsten inert gas (TIG) arc coaxial hybrid welding method with additional high frequency magnetic field and device

A composite welding and high-frequency magnetic field technology, which is applied in the field of material processing, can solve the problems affecting the coaxiality of laser and arc, the drift of welding arc anode spot, and affecting the utilization rate of laser, so as to improve the utilization rate of laser and avoid welding process defects , Improve the effect of stable combustion ability and impact penetration ability

Inactive Publication Date: 2013-06-05
鞍山煜宸科技有限公司
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Problems solved by technology

[0002] In the laser-TIG arc hybrid welding, because the arc and the laser have good coaxiality, there is no relative position problem between the two, and the high-level welding requirements such as laser-TIG arc hybrid welding three-dimensional welding can be successfully realized. However, , in the process of high-power laser arc coaxial hybrid welding, on the one hand, the photoinduced plasma shields the laser and affects the laser utilization rate, and also causes the anode spot drift of the welding arc, which affects the laser-TIG arc coaxial hybrid welding. The coaxiality of the two arcs affects the welding quality

Method used

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Embodiment 1

[0024] The laser-TIG arc paraxial composite welding of galvanized steel plate Q345B and 7075 aluminum alloy materials uses the laser-TIG arc paraxial composite welding method assisted by an external high-frequency magnetic field. The thickness of the welding workpiece 4 is 3mm, butt joints, and the composite welding process parameters are : DC TIG welding, the positive pole of the excitation power supply 6 is connected to the upper end of the excitation coil 5, the negative pole of the excitation power supply 6 is connected to the lower end of the excitation coil 5, the diameter of the tungsten pole 3 is Φ2-4mm; the welding current is 100-220A; the excitation current frequency is 1-20KHz; The duty cycle is 25% to 50%; IPG YLS-6000 fiber laser, the power is 3500W, the spot diameter is 1mm, and the welding speed is 0.1-3.5m / min. Through parameter optimization, the required joint performance can be achieved.

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Abstract

The invention relates to a laser TIG arc coaxial hybrid welding method with an additional high frequency magnetic field and a device. The method includes firstly connecting positive and negative poles of a TIG welding machine to a workpiece and a tungsten electrode respectively, then connecting an exciting power output end to a field coil, connecting the field coil with a laser TIG composite welding head through a composite welding head connecting device, and determining a welding running path; and opening an exciting power supply to supply power for the field coil; opening shielding gas for welding and observing the weld seam formation condition. The method and the device have the advantages that the arc pneumatic pressure and the arc current density are effectively improved, so that the arc heat distribution is concentrated, the arc radius is compressed, the arc energy density and the arc stiffness are further improved, the stability of the welding arc in a laser arc composite welding process is improved, the coaxial composite degree of the laser and the arc during laser TIG arc composite coaxial welding is quite facilitated, and wide markets and application prospects are provided.

Description

technical field [0001] The invention relates to the technical field of material processing, in particular to a laser TIG arc coaxial composite welding method and device with an external high-frequency magnetic field. Background technique [0002] In laser-TIG arc hybrid welding, because the arc and laser have good coaxiality, there is no relative position problem between the two, and high-level welding requirements such as laser-TIG arc hybrid welding three-dimensional welding can be successfully realized. However, In the process of high-power laser arc coaxial hybrid welding, the photoinduced plasma not only shields the laser and affects the laser utilization rate, but also causes the anode spot drift of the welding arc, which affects the laser-TIG arc coaxial hybrid welding. The coaxiality of the two arcs affects the welding quality. [0003] Patent document: A laser TIG arc composite welding method and equipment assisted by electromagnetic current coupling field, patent ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/08B23K26/42B23K26/20B23K9/167B23K26/348B23K26/70
Inventor 邢飞傅新皓王林普雄鹰龙清海
Owner 鞍山煜宸科技有限公司
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