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Laser wire filing welding device and method

A technology of laser wire filling and welding device, applied in laser welding equipment, welding equipment, metal processing equipment and other directions, can solve the problems of undercut, wire clamping, leakage welding, etc., to ensure stability and reliability, and improve product qualification rate and efficiency, the effect of good weld formation

Inactive Publication Date: 2018-09-28
HANS LASER TECH IND GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a laser wire-filled welding device and method, thereby overcoming the poor stability and reliability of the existing laser-filled wire welding. Defects such as missing welds, undercuts, weld bumps, and wire clips seriously affect product quality and welding efficiency

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  • Laser wire filing welding device and method
  • Laser wire filing welding device and method

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Experimental program
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Effect test

Embodiment 1

[0050] This embodiment is aimed at overlay welding of SUS304 stainless steel sheet. During the test, the surface of the stainless steel plate was polished with 600-grit sandpaper, and then cleaned with absolute ethanol to remove the surface oxide layer and oil stains. During the laser welding process, the weldment is clamped with a piano-type fixture to prevent wave-like deformation of the welded specimen. The laser welding machine used in the test is the WFD2500 semiconductor laser welding machine independently developed by Han's Laser, and the welding wire is 0.6mm ER304 stainless steel wire. The configuration of the external optical path for laser welding requires a fiber core diameter of 400um, a collimation of 70mm, and a focus of 150mm. Welding process parameters are: output power 2300W, welding speed 20mm / s, wire feeding speed 60mm / s, spot diameter 0.6mm, wire spacing D=0.5mm, wire feeding angle a=35°, front wire feeding. Argon gas is used for protection during weldin...

Embodiment 2

[0052] This embodiment is aimed at overlay welding of SUS304 stainless steel sheet. During the test, the surface of the stainless steel plate was polished with sandpaper, and then cleaned with absolute ethanol to remove the surface oxide layer and oil stains. During the laser welding process, the weldment is clamped with a piano-type fixture to prevent wave-like deformation of the welded specimen. The laser welding machine used in the test is the WFD2500 semiconductor laser welding machine independently developed by Han's Laser, and the welding wire is 0.6mm ER304 stainless steel wire. The configuration of the external optical path of laser welding requires a fiber core diameter of 400um, a collimation of 70mm, and a focus of 200mm. Welding process parameters are: output power 2000W, welding speed 30mm / s, wire feeding speed 100mm / s, spot diameter 0.6mm, wire spacing D=0mm, wire feeding angle a=70°, front wire feeding. Argon gas is used for protection during welding, and the ...

Embodiment 3

[0054] In this embodiment, welding is performed on a SUS304 stainless steel sheet. The thermal conductivity of SUS304 stainless steel is small, the linear expansion coefficient is large, the lateral displacement of the workpiece caused by thermal shrinkage during the welding process, and the joint gap is too large or too small during connection, etc., it is difficult to guarantee the welding quality, and the most likely to occur in butt welding The defect is burn through. During the test, the two boards were butted along the length direction, and the butt end and upper surface were polished with 600-grit sandpaper, and then cleaned with absolute ethanol to remove the surface oxide layer and oil stains. During the laser welding process, the weldment is clamped with a piano-type fixture to ensure that the assembly gap between the two plates is as small as possible to prevent the wavy deformation of the welded test piece. The laser welding machine used in the test is the WFD2500...

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Abstract

The invention discloses a laser wire filling welding device and method. The laser wire filling welding device comprises a laser welding head and a wire feeding mechanism; the wire feeding mechanism isfixedly arranged on the laser welding head and is used for front wire feeding with an included angle, between a welding wire and the laser optical axis, being 30 to 75 degrees; according to the laserwire filling welding device, through the wire feeding mechanism, front wire feeding is carried out with the included angle, between the welding wire and the laser optical axis, being 30 to 75 degrees, stability and reliability of laser wire filling welding can be ensured, good welding line forming is obtained, and the product yield and efficiency are improved.

Description

technical field [0001] The invention relates to the technical field of laser processing, in particular to a laser wire-filling welding device and method. Background technique [0002] Laser welding has many incomparable advantages compared to traditional welding methods, but laser welding still has many limitations, such as strict requirements on the joint gap, generally not greater than 0.1mm, most of the use occasions are difficult to meet such assembly requirements or increase Processing cost, which is also one of the important reasons for limiting the application range of laser welding. Therefore, in many cases, the laser welding process is required. Studies have shown that laser wire filler welding can not only improve the adaptability of the gap, change the alloy composition of the weld, improve the microstructure and mechanical properties of the welded joint, but also improve the energy coupling between the laser and the workpiece. [0003] In industrial production,...

Claims

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Application Information

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IPC IPC(8): B23K26/211
CPCB23K26/211
Inventor 朱宝华丁凯强李小婷孙子路高云峰
Owner HANS LASER TECH IND GRP CO LTD
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