Method for correcting tubular structure diameter distortion by flame

A technology for pyrotechnic correction and cylinder body, which is applied in the field of flame correction method, can solve the problems of scrapping the cylinder structure, increase the working cycle of correction, etc., and achieve the effects of good control, prevention of scrapping, and shortening of the cycle.

Active Publication Date: 2013-04-17
GUANGZHOU WENCHONG SHIPYARD CO LTD
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Problems solved by technology

However, this pyrotechnic correction method is difficult to better grasp the correction amount of each correction, and often requires multiple corrections. Such repeated heating will inevitably increase the cycle of the entire correction work, and it is easy to cause cylinder damage due to multiple heatings. When the body structure is scrapped

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  • Method for correcting tubular structure diameter distortion by flame
  • Method for correcting tubular structure diameter distortion by flame

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Embodiment Construction

[0014] Such as figure 1 , figure 2 As shown, the pyrotechnic rectification method for the out-of-tolerance cylinder structure described in the present invention, at first, the cylinder structure 1 after welding and cooling is placed on the existing roller welding tool 2, and when the roller welding tool 2 is working, The cylinder structure 1 can be driven to rotate by the roller welding tool 2 to facilitate the measurement of the roundness of the cylinder structure 1 and record it; then, according to the measurement results, the inner wall of the area 11 where the roundness error value of the cylinder structure 1 is negative Apply a radially outward thrust, so that the area 11 with a negative roundness error value has an additional stress acting radially outward on this area in advance, and the outer wall axis of the area 12 where the roundness error of the cylindrical structure 1 is greater than the tolerance Draw the heating line 3 in the direction; then, along the heating...

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Abstract

The invention discloses a method for correcting tubular structure diameter distortion by flame. The method includes that before heating, radial outward pushing force is applied on the inner wall of a tubular structure area with a negative roundness error value to enable an additional stress to radially outwardly act on the area with the negative roundness error value in advance, and simultaneously stress radially inwardly acting on a tubular structure area with roundness error larger than tolerance is generated in the tubular structure area, so that when an area is heated, deformation of the heated area can be accelerated, roundness of a tubular structure can be corrected, correction amount can be well controlled, number of heating time is decreased, period for integral correcting work is shortened, and the situation about tubular structure scrapping caused by over times of heating is avoided.

Description

technical field [0001] The invention relates to a flame rectification method, in particular to a flame rectification method for the out-of-tolerance cylinder structure diameter. Background technique [0002] Some cylinder structures on ships are rolled and welded by steel plates, but because steel plates are rolled into cylinders and during the welding process, large internal stresses will be generated in the cylinders, which will lead to deformation after forming and cooling. If the cylinder structure is deformed, and the deformation exceeds its roundness tolerance range, it needs to be corrected by pyrotechnics, otherwise the cylinder structure cannot be assembled on the flange. In addition, the cylinder structure will also be used to support the cylinder. The lower extension piece of the overall structure is dislocated, which reduces the supporting effect of the lower extension piece. [0003] The existing pyrotechnic correction method is, firstly, place the welded and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D1/08
Inventor 殷长亮潘泽鸿吴勇进李玉亭
Owner GUANGZHOU WENCHONG SHIPYARD CO LTD
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