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Back burning method for vessel body group vertical-position welding component

A technology of small groups and components, used in metal processing equipment, forming tools, manufacturing tools, etc., can solve problems such as heavy workload, reduce work intensity and improve production efficiency.

Active Publication Date: 2017-12-01
SHANGHAI WAIGAOQIAO SHIP BUILDING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the linear backfire is a continuous and uninterrupted heating method, its workload is extremely large

Method used

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  • Back burning method for vessel body group vertical-position welding component
  • Back burning method for vessel body group vertical-position welding component
  • Back burning method for vessel body group vertical-position welding component

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Embodiment Construction

[0025] The present invention will be further described below in conjunction with accompanying drawing.

[0026] The backfiring method for the hull sub-structure of the present invention includes the steps of marking the heating position, selecting the flame characteristics, determining the size of the heating point, selecting the heating temperature, and selecting the heating depth and heating speed.

[0027] The process of marking the heating position includes a heating reference line marking step and a heating point marking step carried out in sequence; wherein,

[0028] When marking the heating reference line, adopt the barge point snap line method, the selection of the barge point snap line position is determined by the deformation of the welded member and the size of the welding leg, and the barge point snap line should be outside the weld leg; When marking the reference line, first use the direct rebuttal method to mark the base point of the elastic line at the free port...

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Abstract

The invention discloses a back burning method for a vessel body group vertical-position welding component. The back burning method comprises the steps of marking a heating position, selecting the flame characteristics, determining the size of a heating spot, selecting the heating temperature, and selecting the heating depth and the heating rate. In the step of marking the heating position, heating reference line marking and heating spot marking are carried out sequentially; when the heating reference line marking is carried out, two parallel heating reference lines are marked in the surface of a plate by adopting a barge spot line snapping method; when the heating spot marking is carried out, heating spots are marked in the two heating reference lines in a staggered manner, and the center distance between the adjacent heating spots of each heating reference line is 60-100mm; and in the step of selecting the flame characteristics, the selection of the flame characteristics, the selection of the flame widths and the selection of the flame distance are carried out. According to the back burning method, the operation intensity of operators is reduced substantially, and the production efficiency of fire work back burning of the group vertical-position welding component is improved.

Description

technical field [0001] The invention relates to a method for back-firing of a hull group vertical member. Background technique [0002] Each ship under construction is assembled and welded by tens of thousands of sub-components, and each sub-component needs to be rectified after welding. At present, the backfire method of the vertical components of the group adopts the linear backfire method. This backfire method is to carry out double-line backfire heating along the outer edge area of ​​the weld leg on the back of the skeleton. Since the linear back burning is a continuous and uninterrupted heating method, its workload is extremely high. Taking a bulk carrier with a capacity of more than 200,000 tons as an example, the frame length of the vertical member of the group is close to 100,000 meters, and each frame has two back-burning heating lines, so the actual length of the back-burning heating line is about 200,000 meters . In order to complete such a huge workload and en...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D37/16B21D3/00
CPCB21D3/00B21D37/16
Inventor 龚一震庞立群周伟郑福康张富春
Owner SHANGHAI WAIGAOQIAO SHIP BUILDING CO LTD
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