Gas protection device and method for large-thickness metal part by laser welding
A technology of laser welding and metal parts, which is applied in laser welding equipment, welding equipment, metal processing equipment, etc., to achieve the effect of suppressing scatter phenomenon, suppressing shielding effect, and strong adaptability
Inactive Publication Date: 2019-08-09
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology
[0005] The purpose of the present invention is to solve the problems in the above technologies, and provide a shielding gas device and method for laser welding large-thickness metal parts
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[0027] In order to make the present invention easier to understand, the technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.
[0028] like figure 1 , figure 2 As shown, the shielding gas device for laser welding large-thickness metal parts of the present invention is directly installed on the laser head. The device includes a fixture 2, a base 4, a pressing block 5, a slider 6, a mandrel 8, a bracket 10, a sleeve 13, a protective gas nozzle 1, and the like.
[0029] In the present invention, the base 4 is directly installed and fixed on the laser welding head by the fixture 2, and moves synchronously with the laser head during the working process. There are 8 connection points distributed on the base 4, and the slider can be fixed by using the screw 7 according to actual needs. 6 is fixed on the base 4, the fixing screw 7 is connected with the slider 6 through the compression block 5, o...
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The invention relates to a gas protection device and a gas protection method for a TC4 titanium alloy large-thickness metal part laser welding process. The gas protection device comprises a clamp, a base, a pressing block, a sliding block, a spindle, a support, a sleeve and a protective gas spray pipe, wherein the gas protection device is fixed on the laser head, and synchronously moves along withthe laser head in the working process, the sliding block is fixed on the base through the pressing block and a screw, the sliding block and the support rotate relative to each other by taking the spindle as the center, the sleeve is connected with a rib plate of the support through a screw, the protective gas spray pipe is fixed on the sleeve and rotates by taking the screw as the center, and a natural rubber gasket is arranged between the sleeve and the protective gas spray pipe so as to increase the friction force. The height of the protective gas spray pipe is enabled to be at a proper position by adjusting the position of the sliding block, and the height of the protective gas spray pipe can be adjusted and rotated at any angle through the rotary support and the sleeve, so that the atmosphere can be effectively protected in the high-temperature molten pool area and in the vicinity of a high-temperature molten pool area in the welding process, and the phenomenon that a weld joint is oxidized is avoided.
Description
technical field [0001] The invention relates to the technical field of laser welding, in particular to a gas shielding method for laser welding of TC4 titanium alloy large-thickness metal parts. Background technique [0002] The traditional TC4 titanium alloy welding process mostly adopts argon arc welding with wire filling, the heat affected zone of the weld seam is large, and the stress and deformation generated by welding are relatively large. As an advanced welding method, laser welding has high energy density, good weld shape, small heat-affected zone and welding deformation, and is easy to automate the welding process. It is very suitable for welding titanium alloys. During laser welding, the surface of the metal base material is strongly vaporized under the irradiation of the laser beam and forms a plasma-like plume metal vapor cloud, which has an obvious shielding effect on the transmission of laser energy, and can also change the focus position of the laser beam, re...
Claims
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IPC IPC(8): B23K26/14B23K26/24B23K103/14
CPCB23K26/14B23K26/24B23K2103/14
Inventor 占小红颜廷艳王飞云高转妮段书尧
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS