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Welding process of steel pipe for building

A welding process, technology used in construction, applied in the field of steel pipe welding

Pending Publication Date: 2021-02-19
HUZHOU NANXUN ZHONGSHENG METAL HEAT TREATMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the cross-sectional shape, it can be divided into circular, square, rectangular and special-shaped steel pipes; according to the material, it can be divided into carbon structural steel pipes, low alloy structural steel pipes, alloy steel pipes and composite steel pipes; Steel pipes for thermal equipment, petrochemical industry, machinery manufacturing, geological drilling, high-pressure equipment, etc.; in many occasions, two steel pipes need to be welded together because of the length. The solder and the metal at the joint are melted and connected. After the weld is cooled, the two steel pipes are connected into a whole. However, this welding process not only requires the welding ability of the welder, but also needs to produce a steel pipe suitable for the weld. Matched butt welding steel material, in order to weld the two steel pipes into a whole

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A welding process for steel pipes for construction, comprising the following steps:

[0023] A. Clean the welding parts before welding, remove rust, oil and other impurities, polish the important parts, and then dry them for later use;

[0024] B. Place the two steel pipes on two welding roller frames respectively, and adjust the weld gap between the two steel pipes to be 10-12mm;

[0025] C. Drive the steel pipe to rotate 3 times per minute through the welding roller frame;

[0026] D. Adjust the welding torch on the welding machine to be located at the center of the weld seam and in a direction 40 mm away from the center of the steel pipe, and the direction of the welding torch is consistent with the direction in which the steel pipe rotates;

[0027] E. Use the automatic welding frame to carry out external welding and internal welding respectively to the welds of the two steel pipes. During external welding, the current of the welding machine on the automatic weldin...

Embodiment 2

[0037] A welding process for steel pipes for construction, comprising the following steps:

[0038] A. Clean the welding parts before welding, remove rust, oil and other impurities, polish the important parts, and then dry them for later use;

[0039] B. Place the two steel pipes on two welding roller frames respectively, and adjust the weld gap between the two steel pipes to be 10-12mm;

[0040] C. Drive the steel pipe to rotate 3 times per minute through the welding roller frame;

[0041] D. Adjust the welding torch on the welding machine to be located at the center of the weld seam and in a direction 40 mm away from the center of the steel pipe, and the direction of the welding torch is consistent with the direction in which the steel pipe rotates;

[0042] E. Utilize the automatic welding frame to carry out external welding and internal welding respectively to the welds of the two steel pipes. During external welding, the current of the welding machine on the automatic we...

Embodiment 3

[0052] A welding process for steel pipes for construction, comprising the following steps:

[0053] A. Clean the welding parts before welding, remove rust, oil and other impurities, polish the important parts, and then dry them for later use;

[0054] B. Place the two steel pipes on two welding roller frames respectively, and adjust the weld gap between the two steel pipes to be 10-12mm;

[0055] C. Drive the steel pipe to rotate 3 times per minute through the welding roller frame;

[0056] D. Adjust the welding torch on the welding machine to be located at the center of the weld seam and in a direction 40 mm away from the center of the steel pipe, and the direction of the welding torch is consistent with the direction in which the steel pipe rotates;

[0057] E. Use the automatic welding frame to carry out external welding and internal welding respectively to the welds of the two steel pipes. During external welding, the current of the welding machine on the automatic weldin...

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Abstract

The invention discloses a welding process of a steel pipe for a building. The welding process comprises the following steps of cleaning a welding position before welding, removing impurities such as rust, oil stain and the like, polishing an important part, and wiping for later use; respectively putting the two steel pipes on two turning rollers, and adjusting the weld spacing of the two steel pipes; driving the steel pipes to rotate through the turning rollers; adjusting a welding gun on a welding machine to be located in the weld center and located in the direction 40 mm away from the centers of the steel pipes; conducting external welding and internal welding on a weld joint of the two steel pipes through an automatic welding frame; soaking the steel pipe in a manganese phosphate phosphating solution for phosphating, and conducting pipe end flat head machining of the steel pipe; immediately conducting heat treatment on the steel pipe subjected to pipe end machining after welding, and conducting heat preservation and slow cooling; and conducting straightening, finishing and end trimming on the steel pipe. The steel pipe welded through the welding process is high in machining precision and stable in quality, and the straightness of the steel pipe is generally lower than 1 mm / m.

Description

technical field [0001] The invention relates to the technical field of steel pipe welding, in particular to a welding process of steel pipes for construction. Background technique [0002] A steel pipe is a steel material with a hollow section whose length is much greater than its diameter or circumference. According to the cross-sectional shape, it can be divided into circular, square, rectangular and special-shaped steel pipes; according to the material, it can be divided into carbon structural steel pipes, low alloy structural steel pipes, alloy steel pipes and composite steel pipes; Steel pipes for thermal equipment, petrochemical industry, machinery manufacturing, geological drilling, high-pressure equipment, etc.; in many occasions, two steel pipes need to be welded together because of the length. The solder and the metal at the joint are melted and connected. After the weld is cooled, the two steel pipes are connected into a whole. However, this welding process not o...

Claims

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Application Information

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IPC IPC(8): B23P15/00B23K31/02B23K37/00B23K101/06B23K103/04
CPCB23P15/00B23K31/02B23K37/00B23K2101/06B23K2103/04
Inventor 盛斌
Owner HUZHOU NANXUN ZHONGSHENG METAL HEAT TREATMENT
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