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Molding method of high-frequency welding pipe

A forming method and high-frequency welding technology, applied in high-frequency current welding equipment, welding equipment, welding/welding/cutting items, etc., can solve the problems such as difficult control of high-frequency welded pipe welding quality, achieve reliable performance, easy realization, Excellent quality results

Inactive Publication Date: 2016-03-02
JIANGSU CHANGSHU HUANTONG IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above factors are fluctuated by the influence of production environment and other factors, which makes the welding quality of high frequency welded pipes difficult to control

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A method for forming a high-frequency welded pipe, comprising the steps of:

[0021] (1) Steel strip unwinding: Unwind and straighten the welded pipe steel strip with an uncoiler;

[0022] (2) Edge planing treatment: use the edge planing device to plan a distance of 5cm on the opposite sides of the steel strip after unwinding, so as to facilitate the edge butt joint;

[0023] (3) Curling forming: on the coiling tube forming machine, the steel strip after planing in step (2) is curled into a tube, and the edge of the steel strip is butted in type II;

[0024] (4) Welding: heat the rolled steel strip, and then use a high-frequency welding machine to weld along the butt joint of the steel strip; the welding process is: speed 7m / min, welding power 350kW, current frequency 2500Hz ; And the distance between the sintering section and the heating section of the steel strip is 5cm;

[0025] (5) Normalizing treatment: Place the welded steel pipe in a heating furnace and heat it...

Embodiment 2

[0028] A method for forming a high-frequency welded pipe, comprising the steps of:

[0029] (1) Steel strip unwinding: Unwind and straighten the welded pipe steel strip with an uncoiler;

[0030] (2) Edge planing treatment: Use the edge planing device to plan a distance of 3cm on the opposite sides of the steel strip after unwinding, so as to facilitate the edge butt joint;

[0031] (3) Curling forming: on the coiling tube forming machine, the steel strip after planing in step (2) is curled into a tube, and the edge of the steel strip is butted in type II;

[0032] (4) Welding: heat the rolled steel strip, and then use a high-frequency welding machine to weld along the butt joint of the steel strip; the welding process is: speed 10m / min, welding power 450kW, current frequency 2500Hz ; And the distance between the sintering section and the heating section of the steel strip is 8cm;

[0033] (5) Normalizing treatment: Place the welded steel pipe in a heating furnace and heat i...

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PUM

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Abstract

The invention discloses a molding method of a high-frequency welding pipe; and the molding method comprises the steps of: (1) steel strip uncoiling; (2) edge planing; (3) bend molding; (4) welding; (5) normalizing treatment; and (6) inspection, marking and warehousing. The molding method of the high-frequency welding pipe is simple in operation and easy to be realized, and effectively controls the performances of the welding pipe through the edge planing treatment, the reasonable welding process and the normalizing treatment; the prepared high-frequency welding pipe is excellent in quality and reliable in performances; and a certain reference is provided for the preparation of the high-frequency welding pipe.

Description

technical field [0001] The invention relates to the technical field of steel pipe preparation, in particular to a forming method of a high-frequency welded pipe. Background technique [0002] The high-frequency straight seam welded pipe uses the skin effect and proximity effect of high-frequency current to rapidly heat the edge to be welded to a certain extent, and completes the welding under the action of the extrusion roller. It can be seen that the welding quality is controlled by factors such as product specifications, input heat, opening angle, and roller speed. These factors are fluctuated by the production environment and other factors, which makes the welding quality of high-frequency welded pipes difficult to control. Contents of the invention [0003] The technical problem mainly solved by the present invention is to provide a forming method of high-frequency welded pipe, which can better control the above-mentioned influencing factors, and improve and enhance t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00B23K13/02
CPCB23P15/00B23K13/025B23K2103/04
Inventor 范建平
Owner JIANGSU CHANGSHU HUANTONG IND
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