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Laser-assisted fuse hollow tungsten electrode argon arc coaxial wire filling welding method

A laser-assisted, argon tungsten arc technology, used in laser welding equipment, welding equipment, metal processing equipment, etc., can solve the problems of low welding deposition efficiency and low welding wire melting speed.

Pending Publication Date: 2021-05-11
HARBIN WELDING INST LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a laser-assisted fuse hollow tungsten argon arc coaxial wire-filling welding method, which solves the problems of low melting speed of welding wire and low welding deposition efficiency during hollow tungsten electrode arc-filling welding

Method used

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  • Laser-assisted fuse hollow tungsten electrode argon arc coaxial wire filling welding method

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Embodiment 1

[0024] A laser-assisted fuse hollow tungsten argon arc coaxial filler wire welding method, the method includes: preparing welding wire 1, insulating layer 2 and hollow tungsten electrode 3, step 1: before welding, grinding or cleaning the workpiece to be welded, and Fix the workpiece to be welded after grinding or cleaning, use low-alloy steel as the surfacing base material, the size is 30mm×150mm×300mm, and the nickel-based alloy ERNiCrFe-7 is used as the filler wire, and the diameter of the wire is 1.2 mm. The outer diameter of the hollow tungsten electrode is 6 mm, the inner diameter is 3 mm, and the ceramic tube is fixed in the inner hole of the tungsten electrode as the insulating layer for the welding wire and the inner wall of the hollow tungsten electrode. The outer diameter of the ceramic tube is 3 mm, and the inner diameter is 1.5 mm. , grinding or cleaning the base metal of low alloy steel, and fixing it after grinding;

[0025] An insulating layer is fixed in the i...

Embodiment 2

[0031] According to the laser-assisted fuse hollow tungsten argon arc coaxial filler wire welding method described in embodiment 1, the diameter of the welding wire is not greater than the central hole of the hollow tungsten pole, and when the welding wire is fed through the central hole of the hollow tungsten pole, the welding wire and the tungsten pole The inner walls are kept insulated by insulating layers.

Embodiment 3

[0033] According to the laser-assisted fuse hollow tungsten argon arc coaxial wire-filled welding method described in embodiment 1, the welding heating method of the molten pool is hollow tungsten arc heating, the laser heat source acts on the welding wire, and the laser acts on the welding wire The point is in the area of ​​the hollow tungsten arc, and the combined heating of the laser and the hollow tungsten arc increases the melting speed of the welding wire.

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Abstract

The invention discloses a laser-assisted fuse hollow tungsten electrode argon arc coaxial wire filling welding method. The hollow tungsten electrode arc changes the welding current density distribution and the arc pressure form by changing the shape of the tungsten electrode, so that the arc pressure is greatly reduced, very good welding seam forming is guaranteed, and tungsten electrode inert gas shielded welding is promoted to be developed towards the high productivity direction. However, when a hollow tungsten electrode is adopted, the current density, the temperature and the plasma flow velocity on the central axis of a TIG electric arc are obviously reduced, so that the melting capacity of a heat source welding wire is poor, and the deposition efficiency is not high in the welding process when the welding wire is filled. The composition of the laser-assisted fuse hollow tungsten electrode argon arc coaxial wire filling welding method comprises the welding wire (1), an insulating layer (2) and the hollow tungsten electrode (3), the insulating layer is fixed in an inner hole of the hollow tungsten electrode, the welding wire penetrates through the insulating layer, and the insulating layer is a ceramic tube. The laser-assisted fuse hollow tungsten electrode argon arc coaxial wire filling welding method is used for laser-assisted fuse hollow tungsten electrode argon arc coaxial wire filling welding.

Description

technical field [0001] The invention relates to the technical field of hollow tungsten arc wire-filled welding, in particular to a laser-assisted fuse hollow tungsten-argon arc coaxial wire-filled welding method. Background technique [0002] Arc welding is the earliest welding process in welding production, and it has been widely used in the fields of automobile, military, aerospace and high-end equipment manufacturing. Tungsten inert gas shielded welding (TIG) has the advantages of mature welding technology, simple operation, strong adaptability, and low cost. However, this welding method has small heat input, low deposition rate, and slow welding speed, which cannot meet the needs of production. The need for welding productivity. Increasing the welding current can greatly improve the welding productivity, but the increase of the welding current will easily lead to two problems: (1) The TIG arc pressure increases suddenly, and the arc pressure has a great influence on the...

Claims

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Application Information

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IPC IPC(8): B23K26/348B23K26/60B23K26/70
CPCB23K26/348B23K26/60B23K26/70
Inventor 方迪生黄瑞生陈健杨义成孙谦滕彬李小宇蒋宝邹吉鹏曹浩武鹏博
Owner HARBIN WELDING INST LTD
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