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a welding process

A welding process and welding step technology, applied in the field of welding process, can solve the problems of poor connection firmness of steel pipes, easy breakdown of spot welding, and large heat at the folded place, so as to reduce the subsequent grinding work, and to achieve good welding firmness. The effect of improving mechanical strength

Active Publication Date: 2020-04-21
WUXI TIANLI BOILER EQUIP MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the manufacture and welding of steel pipes is a crucial step for qualified products. According to the production standards, the welding quality of the steel pipes is required to be relatively high. However, the existing 45-degree joint angles of round pipes in the welding of steel pipes form sharp angles, which are easy to cause cuts. Dangerous to personal safety, the existence of the sharp corners cannot meet the international or national standards for sports equipment. In addition, the existing welding adopts full spot welding, which takes a long time to weld, and the heat at the abscess is high, and it is easy to cause breakdown during spot welding. Good product The welding rate is low, and the strength of the welding mechanical properties at the weld seam of the steel pipe is weak, which makes the connection of the steel pipe poor in firmness

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A welding process, the welding steps are as follows:

[0023] Step 1: cutting;

[0024] The butt joints of the cylindrical structure connecting pipes are obliquely cut, and the cutting parts are sanded with a grinder to make the outer surface smooth;

[0025] Step 2: pressure angle;

[0026] A round corner pressing die is used to press and bend the cutting part of the single tube. A travel switch is set on the pressing die. The travel switch is used to control the depth of the pressing angle. The depth range of the pressing angle is ≥ R3, and the pressing time is 3-6s. The value is 8-12t, and the pressing method is different according to the shape of the pipe body. When the pipe body is a cylindrical structure, the pressing method is arranged in parallel. After pressing, it forms an arc-shaped transition section structure, which meets the safety standard. carry out grinding treatment;

[0027] Step three: welding;

[0028] The position of the joint of the pipe body ...

Embodiment 2

[0035] A welding process, the welding steps are as follows:

[0036] Step 1: cutting;

[0037] Cut the butt joint of the connecting pipe obliquely, and use a grinder to grind the cut part to make the outer surface smooth;

[0038] Step 2: pressure angle;

[0039] A round corner pressing die is used to press and bend the cutting part of the single tube. A travel switch is set on the pressing die. The travel switch is used to control the depth of the pressing angle. The depth range of the pressing angle is ≥ R3, and the pressing time is 3-6s. The value is 8-12t. When the pipe body is an elliptical structure, its pressing is vertically arranged. After pressing, it forms an arc-shaped transition section structure, which meets the safety standard. After pressing, the surface is polished;

[0040] Step three: welding;

[0041] The position of the joint of the pipe body has a large undulating arc, the joint gap is >0.3mm, and the spot welding method is adopted. There are two or mo...

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Abstract

The invention discloses a welding technology. The welding technology comprises the welding steps that 1, cutting is carried out, particularly, a joint of connection pipes is obliquely cut, oblique cutting at different angles is carried out according to different pipe specifications, a grinding machine is adopted at a cut position for grinding treatment, and the outer surface is made in a smooth state; 2, corner pressing is carried out; 3, welding is carried out; 4, polishing treatment is carried out; and 6, welding joint appearance examination is carried out on welded pipe bodies, and follow-up paint spraying appearance treatment is carried out. The spliced position is in smooth transition, no sharp corner structure is formed, therefore, personnel safety is ensured, the appearance is moreattractive, two combining ways are adopted for welding, welding firmness is better, the production efficiency is improved, the production cost is reduced, the mechanical strength of a steel pipe welding joint is improved, follow-up polishing treatment work is reduced, and the yield is improved.

Description

technical field [0001] The invention relates to the field of steel pipe welding, in particular to a welding process. Background technique [0002] At present, the manufacture and welding of steel pipes is a crucial step for qualified products. According to the production standards, the welding quality of the steel pipes is required to be relatively high. However, the existing 45-degree joint angles of round pipes in the welding of steel pipes form sharp angles, which are easy to cause cuts. Dangerous to personal safety, the existence of the sharp corners cannot meet the international or national standards for sports equipment. In addition, the existing welding adopts full spot welding, which takes a long time to weld, and the heat at the abscess is high, and it is easy to cause breakdown during spot welding. Good product If the rate is low, the strength of the welding mechanical properties at the weld seam of the steel pipe is weak, which makes the connection of the steel pi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P13/00
CPCB23P13/00
Inventor 张河
Owner WUXI TIANLI BOILER EQUIP MFG
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