Line heating automatic forming method based on curve surface unfolding

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...

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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

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