Welding process design method based on model geometrical element driving

Abstract

The invention discloses a welding process design method based on model geometrical element driving. The method is characterized by comprising the following steps of: (1) establishing a positioning reference according to a welding seam, determining the welding type of a target product, and classifying; (2) determining geometrical information corresponding to different welding types; (3) obtaining geometric elements of all components in the target product based on feature recognition, and determining the welding type through matching; and (4) generating a welding process: generating the weldingprocess based on a knowledge reasoning method according to the created welding process knowledge base. Intelligent design of the welding process can be achieved, the design period of the welding process of a component product is shortened, and the quality of the welding process is improved.

Description

technical field [0001] The invention relates to a welding process design method, in particular to a welding process design method driven by model geometric elements. Background technique [0002] Although more and more 3D CAD modeling technology is used in the design stage of ship assembly products to replace the original 2D drawings with 3D models, but in the stage of welding process design of assembly products, the reuse of welding process knowledge is not sufficient , mainly written by craftsmen, did not realize the automatic identification of geometric element information in the ship assembly product model to carry out related welding process design work, so as to achieve the purpose of improving the efficiency of process design. [0003] The current three-dimensional welding process uses computers to formulate the welding process for ship assembly products, which can solve the problems of low efficiency, error-prone, and instability in traditional manual compilation. Ho...

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Problems solved by technology

[0002] Although more and more 3D CAD modeling technology is used in the design stage of ship assembly products to replace the original 2D drawings with 3D models, but in the stage of welding process design of assembly products, the reuse of welding process knowledge is not sufficient , mainly written by craftsmen, did not realize the automatic identification of geometric element information in the ship assembly product model to carry out relevant welding process design work, so as to achieve the purpose of improving process design efficiency

[0003] The current three-dimensional welding process uses computers to formulate the welding process for ship assembly products, which can solve the problems of low efficiency, error-prone, and instability in traditional manual compilation. However, the carrier of welding process design is still two-dimensional drawings and tables, three-dimensional The model does not fully penetrate the process design process of ship assembly products, and it is difficult to realize the effective association between welding process data and geometric elements in the 3D model, resulting in the separation of product welding process data and model structure data, which cannot further improve the welding process design. Intelligent degree

[0004] The existing technology has the following disadvantages: First, the traditional assembly and welding process design is mainly expressed in two-dimensional form (drawings, process cards, etc.), this expression method cannot make full use of the three-dimensional modeling data, and a large amount of process information still relies on manual writing

Second, poor consistency between products

Due to the different understanding of the drawings, when the same component is compiled by different technicians, different plans will be obtained, which lacks consistency. However, it is difficult to fully and correctly consider the welding process in the initial stage of component product design. Feedback and modification of process problems are difficult to achieve

Third, the design is difficult and knowledge is easily lost

Process design is an overall optimization process that coordinates the technical requirements of component products, enterprise economic benefits and social effects. It involves a wide range of areas and handles a large amount of information. Accumulation is a long-term process. Without the reference and accumulation of knowledge base, knowledge will be lost with the change of personnel, and there is a lack of knowledge accumulation and reuse means.

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