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Welding deformation control aid of large-size stainless steel cylinder and welding deformation control method

A stainless steel cylinder, welding deformation technology, applied in welding/cutting auxiliary equipment, manufacturing tools, welding equipment, etc., can solve problems such as difficulty in ensuring no deformation, adverse effects on the performance of cylinder materials, and difficult problems, and achieve easy to master and avoid mechanical problems. Shape correction and hot shape correction process, the effect is remarkable

Active Publication Date: 2010-08-11
CHINA FIRST HEAVY IND +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This kind of production process, for some large cylinders, especially the cylinder needs to be completed on site, without the conditions of mechanical correction after welding, it is difficult to ensure no deformation; the method of thermal correction will be detrimental to the performance of the cylinder material Influence, when it is not suitable for use, controlling welding deformation has always been a process problem

Method used

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  • Welding deformation control aid of large-size stainless steel cylinder and welding deformation control method
  • Welding deformation control aid of large-size stainless steel cylinder and welding deformation control method
  • Welding deformation control aid of large-size stainless steel cylinder and welding deformation control method

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Embodiment Construction

[0020] The present invention will be further described below in conjunction with the embodiments given in the accompanying drawings. An example is the welding of cylinders of nuclear power equipment.

[0021] First prepare a large-scale welding platform at the welding site, and draw the assembly reference line of the inner and outer circumference of the cylinder on the welding platform as a reference base for assembling the cylinder. Hoist the arc section of the cylinder on the platform, place it in place according to the assembly reference line drawn on the inner and outer circumference of the cylinder, measure the length and angle of the unattached line length section on both sides of the longitudinal seam of the cylinder in a free state, and determine the rigid restraint range. Prepare rigid restraint aids according to the scope of rigid restraint. The aids include inner and outer arc flat plates and top wires. The inner arc flat plate is an arc lath with a convex arc on on...

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Abstract

The invention relates to a welding deformation control aid of a large-size stainless steel cylinder, comprising an inner arc flat panel, an outer arc flat panel and jack screws, wherein the inner arc flat panel and the outer arc flat panel are flat panels one side of which is an arc side, and the arc radiuses of the arc sides are the same as that of the cylinder; the jack screws are fixedly connected to both sides of points of the plat panels opposite to a longitudinal welding line of the cylinder; and the top ends of the jack screws face towards the arc sides of the plat panels. When in use, the assembly datum lines of the inner circumference and the outer circumference of the cylinder are drawn out on a welding platform, and the arc segment of the cylinder is hung on the platform and takes the places according to the datum lines; the lengths and the angles of a non-line length segment at both sides of the longitudinal line under a free state are measured, and the aid is selected according to the non-line lengths and the angles; the aid is spot welded on the cylinder, and the longitudinal line of the cylinder is alternately welded; and the welding order and the jack screws on the aid are adjusted according to the deformation condition of the longitudinal line. The invention has the advantages that the working procedures of mechanical shape correction and the hot shape correction after welding of the cylinder are avoided; the deformation in a welding process can be directly observed and regulated by taking technical measures; and the aid has simple structure and use method.

Description

technical field [0001] The invention belongs to the field of welding technology, in particular relates to welding deformation control, and is particularly applicable to the welding deformation control of large stainless steel cylindrical parts. Background technique [0002] At present, in the production process of the medium-thickness cylinder of the steel container, generally after the longitudinal seam welding of the cylinder joint, the cylinder needs to be corrected on the plate rolling machine, or the thermal correction (such as flame correction) is used to correct the shape. The main purpose is to overcome the angular deformation produced by longitudinal seam welding. This kind of manufacturing process, for some large cylinders, especially the cylinder needs to be completed on site, without the conditions of mechanical correction after welding, it is difficult to ensure no deformation; the method of thermal correction will be detrimental to the performance of the cylind...

Claims

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Application Information

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IPC IPC(8): B23K37/00
Inventor 刘恩清杜寿涛刘玉平
Owner CHINA FIRST HEAVY IND
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