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Induced auxiliary arc ignition agent and arc ignition method for drawn arc stud welding of medium and large diameter studs

An arc ignition agent and large diameter technology, applied in arc welding equipment, welding equipment, welding medium, etc., can solve problems such as difficulty in arc ignition, achieve good weld metallographic structure, improve efficiency, and improve weld quality.

Active Publication Date: 2021-08-03
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide an auxiliary arc starting method that uses arc starting agent to increase the electron emission at the moment of arc starting for the problem of difficult arc starting when medium and large diameter steel studs are welded with steel plates. method

Method used

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  • Induced auxiliary arc ignition agent and arc ignition method for drawn arc stud welding of medium and large diameter studs
  • Induced auxiliary arc ignition agent and arc ignition method for drawn arc stud welding of medium and large diameter studs

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Take a Q235 stud with a diameter of 18mm and a 14mm thick plate as an example.

[0022] First, prepare a special arc ignition agent before welding. The arc ignition agent composition is: 10% TiO 2 , 15% Fe 3 o 4 , 15% FeO, 5% Fe powder, 2% K 2 CO 3 , 3% Na 2 CO 3 , 50% Al powder, and dry the arc starter. Next, mechanically polish the surface of the stud 1 and the base material 3 to remove rust and oil stains, clean the surface of the base material 3 and the stud 1 with acetone solution, wipe them with alcohol, and quickly dry them. Spread the prepared arc ignition agent 4 evenly in a ring shape on the area to be welded on the base material 3, and reserve the arc ignition position, assemble the ceramic ring 2, clamp the stud 1, place the base material 3 horizontally, and place the stud 1 The tapered end of the column 1 is downward and vertical to the base material 3, so that the stud 1 exerts a certain pressure on the base material 3; start the stud welding machin...

Embodiment 2

[0024] Take a Q235 stud with a diameter of 22mm and a thick plate of 18mm as an example.

[0025] First, prepare a special arc ignition agent before welding. The arc ignition agent composition is: 13% TiO 2 , 15% Fe 3 o 4 , 10% FeO, 5% Fe powder, 2% K 2 CO 3 , 3% Na 2 CO 3 , 52% Al powder, and dry the arc starter. Next, mechanically polish the surface of the stud 1 and the base material 3 to remove rust and oil stains, clean the surface of the base material 3 and the stud 1 with acetone solution, wipe them with alcohol, and quickly dry them. Spread the prepared arc ignition agent 4 evenly in a ring shape on the area to be welded of the base metal 3, and reserve the arc ignition position. Assemble the ceramic ring 2, clamp the stud 1, place the base material 3 horizontally, put the tapered end of the stud 1 downward, and vertically base the base material 3, so that the stud 1 exerts a certain pressure on the base material 3; start the screw Post welder for welding. It ...

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Abstract

The invention discloses a medium and large diameter stud welding induction auxiliary arc ignition agent, which is calculated as mass fraction: 10%-15% TiO 2 , 10%‑15% Fe 3 O 4 , 10%-15% FeO, 5% Fe powder, 2%-3% K 2 CO 3 , 3% Na 2 CO 3 , and the rest are Al powder. Specifically, it is an auxiliary arc-starting agent for medium and large diameter stud drawn arc stud welding. The invention can solve the problem of difficulty in arc striking in the stud welding process, and realize smooth arc striking during the welding of medium and large diameter stud welding. It has the advantages of simple operation and obvious effect.

Description

technical field [0001] The invention relates to an auxiliary arc starting method for stud welding, in particular to an induced auxiliary arc starting agent and an arc starting method for medium and large diameter stud drawn arc stud welding, belonging to the field of welding. Background technique [0002] Arc stud welding is a welding method for welding screw-shaped or columnar metal to the surface of a metal sheet. The basic principle is to ignite the arc between the stud to be welded and the workpiece. When the stud and the workpiece are heated to a suitable temperature, under the action of external force, the stud is sent into the welding pool on the workpiece to form a welded joint. In the processing and fixing of studs in the workpiece industries such as vehicles, shipbuilding, boilers, steel structures, construction, electronics, instruments, and medical equipment, the traditional method of thread fastening is generally used, but this method requires threading on the b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/20B23K35/28B23K9/067
CPCB23K9/0675B23K9/20B23K35/288
Inventor 张德库王恒王克鸿周琦冯曰海黄俊彭勇欧婷
Owner NANJING UNIV OF SCI & TECH