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Line heating automatic forming method based on curve surface unfolding

A technology of water-fire bending and forming method, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problems of immature heating parameters, changes, application of automation equipment, etc., to improve detection methods and reduce labor intensity. , the effect of improving working conditions

Inactive Publication Date: 2014-12-24
JIANGSU UNIV OF SCI & TECH
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Problems solved by technology

[0003] In the past ten years, many scientific research institutions and universities at home and abroad have devoted themselves to the research of water-fired bending automation equipment, but there has been no mature automation equipment applied in actual shipyards, especially the automation equipment that realizes complete line heating and forming. very few
At present, the main technical bottleneck is that the research on the mechanism of heating deformation and the research on heating parameters are not mature enough, and the detection method of the processed ship plate has also become a serious obstacle to the development of automatic bending equipment, which is not suitable for closed-loop control of automatic processing. need to change

Method used

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  • Line heating automatic forming method based on curve surface unfolding
  • Line heating automatic forming method based on curve surface unfolding
  • Line heating automatic forming method based on curve surface unfolding

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Embodiment Construction

[0040] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0041] Such as figure 1 As shown, the technological process of the water-fired bending plate automatic forming system based on curved surface expression in the present invention is: 1) import a certain real ship plate Tribon data; 2) carry out non-uniform B-spline expression to the imported ship shell plate to fit This is the surface of the real ship plate; 3) The initial triangle expansion is performed on the surface, and the initial expansion data is used as the initial value of iteration, and the data of all expansion points can be obtained by iteratively solving with the improved multi-behavior global fish swarm algorithm; 4) Calculate the amount of shrinkage at the cracks of the unfolded plate, and use the inference computer system to calculate and give the heating line path layout; 5) According to the already arranged heating lines, the p...

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Abstract

The invention discloses a line heating automatic forming method based on curve surface unfolding. The method comprises the following steps that on the basis of the existing boat plate Tribon data, a curve surface unfolding method is adopted for calculating the path arrangement of a heating line; then, proper processing technical parameters are selected from a line heating expert system for forming processing. After the primary processing forming, the formed curve surface is subjected to measurement and fitting by using a computer visual technology and is inputted into a processing system, then, a boat plate is unfolded, the unfolding surface is compared with the unfolding surface required in the design drawing in shrinkage amount, and if the comparison result does not reach the forming quantity requirement and is beyond the error range, the processing system carries out parameter selection again; if the boat plate unfolding quantity comparison error is within the required range, the forming reaches the requirement. The method provided by the invention has the advantages that the line heating automatic forming is realized, and the forming rate and the production efficiency of the boat plate are improved.

Description

technical field [0001] The invention relates to a method for forming a water-fired bending plate of a ship hull, in particular to an automatic forming method for a water-fired bending plate based on curved surface development, and belongs to the technical field of shipbuilding. Background technique [0002] The hull of a ship is welded by many complex non-expandable space curved panels. The water and fire bending (Line Heating) forming process of the double curvature hull panel originated in Japan in the 1950s and 1960s. Due to its fast processing , flexible operation, no need for other equipment, and suitable for forming and processing complex shapes, etc., have been rapidly and widely used in shipyards around the world, and have become the main processing method for double-curvature outer plates. At present, almost all double-curvature outer plates The outer plates of the curved hull are all formed by the water and fire bending process. However, for a long time, this craf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 齐亮李彦袁伟苏贞
Owner JIANGSU UNIV OF SCI & TECH
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