Method for modelling and simulating one-sided welding two-sided forming process by grids

Abstract

The invention provides a method for modelling and simulating a one-sided welding two-sided forming process by grids. A gridding method in computer graphics is used for modelling and simulating a welding pool and weld formation, constructing a welding bead, the welding pool and a welding line model which take plane triangle grids as a basis; and combining a double-ellipsoidal model with a Gauss thermal source model to obtain a welding pool sinking and weld reinforcement growth function. In the invention, two grids are adopted to respectively simulate front and back welding lines of a bottom layer, a filling layer and a cover layer are respectively simulated by corresponding single-layer grids; and motion of vertexes of each triangle grid is controlled by virtue of the welding pool sinking and weld reinforcement growth function, thus a sunk grid welding pool and a grid welding line are formed. Actual operation tests show that an integrated system runs stably and the simulation effect is lifelike.

Description

【Technical field】 [0001] The invention belongs to the simulation and simulation of single-sided welding and double-sided forming in a welding operation simulation training system. The invention relates to a grid realization method for virtual single-sided welding and double-sided forming molten pool and weld seam forming process. 【Background technique】 [0002] In recent years, the application of virtual reality and visual simulation technology in the field of welding has gradually matured. Compared with traditional welder training methods, the welding operation simulation training system based on computer technology is pollution-free, high-efficiency, low-cost, and easy to operate. And other advantages are more and more favored by people. This training method creates a virtual three-dimensional world that can reflect the posture of the welding torch and the shape of the welding pool and weld seam under different postures in real time, and provides visual, auditory and tacti...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method that can solve the problem that the model established in the existing virtual molten pool and weld forming process cannot simulate the dynamic gradient process of single-sided welding and double-sided forming molten pool and weld forming in real time. The integrated model of welding bead, molten pool and weld seam is established by using the method to realize the dynamic effect of single-sided welding, double-sided forming molten pool and weld seam forming in the virtual welding scene, and the single-sided welding is represented by the continuous change of grid vertices. The details of the double-sided forming molten pool and weld forming, and the real-time performance of the system is not limited. The simulation and simulation of the single-sided welding and double-sided forming process.

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