Method and device for correcting outer diameter of steel pipes

A correction method and technology for steel pipes, which are applied in the field of steel pipe outer diameter correction and devices, can solve problems such as affecting the appearance and quality of steel pipes, high manufacturing and maintenance costs, and increasing production costs of enterprises, saving equipment and manpower investment, simple structure, The effect of improving production efficiency

Inactive Publication Date: 2009-12-16
ZHEJIANG ZHONGLI STAINLESS STEEL PIPE
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, the correction method for the outer diameter of the steel pipe above consumes 1.0 to 3.0 cm of the head of the steel pipe. Steel pipes with positive deviation or ovality cannot be directly processed by argon arc welding welding head. After the welding head is cold-drawn and finished, the steel pipe will be short, and it will either be re-fed for production, or it will be judged as a substandard product; the existing steel pipe correction method The process is cumbersome and redundant, the production efficiency is low, and the production cost of the enterprise is increased. In addition, the existing calibration equipment for the outer diameter of the steel pipe is complex, takes up a large space, and has high production and maintenance costs. The steel pipe is easily damaged during the calibration process. Affect the appearance and quality of the steel pipe

Method used

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  • Method and device for correcting outer diameter of steel pipes
  • Method and device for correcting outer diameter of steel pipes
  • Method and device for correcting outer diameter of steel pipes

Examples

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Embodiment

[0023] Embodiment: a method for correcting the outer diameter of a steel pipe. The method is to add a drawing device to push the steel pipe in the existing cold drawing machine; Die base to achieve the correction of the outer diameter of the steel pipe; the small pliers of the cold drawing machine pull the drawing device, and the drawing device pushes the steel pipe through the drawing die base, and the small pliers of the cold drawing machine pull a penetrating steel pipe and are equipped with a supporting component The pull rod, the support component blocks the end of the steel pipe, and pushes the steel pipe through the drawing seat with the action of the pull rod; the support component blocks the steel pipe, and uses a support special part fixed on the pull rod with a nut to block the steel pipe; The small pliers of the cold drawing machine pull a drawing rod that runs through the steel pipe, and the nylon sleeve set on the drawing rod protects the inner wall of the steel p...

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Abstract

The invention discloses a method for correcting outer diameter of steel pipes. The method comprises the step of adding a drawing device for pushing a steel pipe to the prior cold-drawing machine, wherein a trolley of the cold-drawing machine grips and draws the drawing device, and the drawing device pushes the steel pipe to pass through a die-drawing seat so as to correct the outer diameter of the steel pipe. The method for correcting outer diameter of steel pipes has the advantages of improving production efficiency and reducing production cost, along with simple process and convenient operation.

Description

technical field [0001] The invention relates to a method and a device for correcting a steel pipe, in particular to a method and a device for correcting the outer diameter of a steel pipe. Background technique [0002] In the production process of steel pipes, due to process factors such as drawing (or cold rolling) die wear, solution treatment deformation, and straightening adjustment errors, it is inevitable that the outer diameter of the finished product will exceed the standard positive deviation or the ovality of the steel pipe will occur, especially for thin steel pipes. Wall pipes or high-standard contract steel pipes have particularly prominent requirements for outer diameters. For random-size contracts, once the above problems occur, the general method of correcting the outer diameter of the steel pipe is to weld the pipe head with argon arc welding first, so that the steel pipe head can pass through the drawing die seat and be cold-drawn to the specified size. How...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C1/22B21C1/26B21C1/34
Inventor 陈玉祥
Owner ZHEJIANG ZHONGLI STAINLESS STEEL PIPE
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