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Application method for X groove in thick-wall pipe high frequency induction welding

A technology of high-frequency induction welding and application method, which is applied to high-frequency current welding equipment, welding equipment, workpiece edge parts, etc. , The effect of solving the unstable welding quality and improving the welding production speed

Inactive Publication Date: 2017-03-22
PANYU ZHUJIANG STEEL PIPE LIANYUNGANG
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Problems solved by technology

[0006] The present invention is aimed at the technical problems existing in the prior art, and provides a method for applying X-groove in high-frequency induction welding of thick-walled pipes, so as to solve the problem of uneven heating temperature in the process of producing thick-walled high-frequency induction welded pipes in the prior art , the problem of overheating and early melting of inner and outer wall edges

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  • Application method for X groove in thick-wall pipe high frequency induction welding
  • Application method for X groove in thick-wall pipe high frequency induction welding

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Embodiment 1

[0013] Embodiment 1: see figure 1 , a method for applying X-groove in high-frequency induction welding of thick-walled pipes, and a method for applying X-groove in high-frequency induction welding of thick-walled pipes. Mouth milling, 3) forming, 4) high-frequency welding.

[0014] The X-shaped groove edge milling in the step 2), the X-shaped groove is processed by the edge milling machine, and the full length of the edge milling machine is used for processing, the angle of the upper and lower grooves is a=30°~40°, and the upper and lower grooves Height h1 / h2=0.15t~0.35tmm.

[0015] Specific application examples:

[0016] 1. In the production of φ610*22 and material 355J0H, I-groove high-frequency induction welding is adopted.

[0017] 2. φ457*17.5 / 355.6*14.2, material L415M adopts X-groove high-frequency induction welding. The process flow is loaded and uncoiled according to the conventional production method. The edge milling groove is set to be 40° up and down, the heig...

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Abstract

The invention discloses an application method for an X groove in thick-wall pipe high frequency induction welding. The application method is characterized by comprising the following steps of (1) loading and flattening, (2) edge milling of the X type groove, (3) forming by entering a forming unit, and (4) high frequency welding; according to edge milling of the X type groove in the step (2), the X type groove is machined by an edge milling machine, overall length machining is conducted through the edge milling machine, the upper and lower groove angle a is equal to 30 degrees to 40 degrees, and the upper and lower groove height h1 / h2 is equal to 0.15 t to 0.35 t mm. The problems that in the prior art, during production of a thick-wall high frequency induction welding pipe, the heating temperature is nonuniform, and the edges of the inner wall and the outer wall is overheated and is melted in advance are solved.

Description

technical field [0001] The invention relates to a method for applying an X-groove in high-frequency induction welding of thick-walled pipes, and belongs to the technical field of high-frequency welding. Background technique [0002] High-frequency welding (HFW) technology is a technology that uses the skin effect and proximity effect of high-frequency current to rapidly heat the edge of the base metal to the welding temperature and then extrude and weld to achieve material connection. The high-frequency straight seam induction welded pipe system has high production speed, stable welding process and good quality, and has been widely used in welded pipe production. In recent years, with the development of HFW welded pipe technology, it has been applied in the fields of oil and gas transmission pipelines, building structural pipes, medium and low pressure fluid transmission pipes, etc., and has gradually developed in the direction of large-diameter and thick-walled pipes. [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K33/00B23K13/01
CPCB23K33/00B23K13/01
Inventor 顾亚光李路华
Owner PANYU ZHUJIANG STEEL PIPE LIANYUNGANG
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