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Arc stud welding method

A technology of stud welding and parts welding, applied in welding equipment, arc welding equipment, coating, etc., can solve problems such as complex process, unstable arc, pollution, etc., achieve simple processing, improve welding quality, and reduce costs Effect

Inactive Publication Date: 2007-11-21
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing stud welding method: do not process the welded end of the stud welding part with a smaller diameter, the welded end of the part is easily oxidized, forming an oxide layer, it is difficult to start the arc during welding, and the arc is unstable. The welded joints are prone to defects such as pores and slag inclusions, which seriously affect the welding quality of stud welding parts
The welding end of the stud welding parts with a larger diameter is drilled in the middle, and a small piece of aluminum wire is riveted as the arc ignition agent and protective atmosphere during welding. The aluminum embedding process is complicated, the production efficiency is low, and the manufacturing cost is high; and Due to the large diameter of the stud welding parts, the welding parts are only embedded with aluminum, and there is still an oxide film on the end surface. In addition, it is easy to cause oxidation and pollution on the end surface of the welding end during storage and transportation, so that the welding quality cannot be guaranteed.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The first specific embodiment of the present invention is: a stud welding method, first sandblasting the welding end face of the stud welding part, and then thermally spraying aluminum or aluminum alloy coating on the end face by thermal spraying process, Arc welding is then carried out.

[0016] The specific method of sand blasting treatment is: first, decontaminate the surface of the welding end of the stud welding parts with alkali. Then use chilled low-phosphorus cast iron sand with a sand grain size of 0.5-2.0mm for sandblasting treatment. After the treatment, the surface roughness of the welding end of the stud welding part is Ra=40-100μm, and the sandblasting rust removal level reaches Sa3 level ( GB8923-88); The specific method of thermal spraying treatment is: spray the aluminum material onto the welding end of the stud welding part by arc spraying method, and make the thickness of the sprayed layer reach 10-350μm.

Embodiment 2

[0018] This example is basically the same as Example 1, except that organic solvents are used for decontamination, quartz sand with a grain size of 0.5-2.0 mm is used for sandblasting, and the flame spraying method is used to spray aluminum alloy to make the thickness of the sprayed layer Reach 50 ~ 400μm.

Embodiment 3

[0020] This example is basically the same as Example 1, except that organic solvents are used for decontamination, corundum sand with a grain size of 0.5-2.0mm is used for sandblasting, and the flame spraying method is used to spray aluminum alloy to make the thickness of the sprayed layer Reach 15 ~ 500μm.

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PUM

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Abstract

The present invention discloses a stud welding method. Said method includes the following steps: sand-blasting the end face of welding end of part, adopting thermal spraying process to thermally spray aluminium or aluminium alloy coating layer on said end face, then making stud welding step.

Description

technical field [0001] The invention relates to an arc welding method, in particular to a stud welding method. Background technique [0002] The stud welding method belongs to the arc welding method, including two methods: capacitor discharge stud welding or arc stud welding. During the welding process of stud welding, studs and stud welding parts similar to studs, such as shear nails and T-shaped nails, are in contact with the base metal, and the arc is ignited by a large current and the action of the arc starter, so that The welding end face of the stud welding part and the corresponding base metal surface are heated to a molten state. After reaching a suitable temperature, the stud welding part is extruded into the molten pool on the surface of the base metal, so that the two are fused to form a weld to complete the screw. Welding of column welding parts and base metal. This welding method requires extremely high efficiency and reliable welding quality, and it is widely...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/20B23K9/235C23C4/06B24C11/00
Inventor 周友龙
Owner SOUTHWEST JIAOTONG UNIV
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