Research on stretching flame correction technology of aluminum alloy ship frame skin welding structure

At present, conventional flame correction has shortcomings such as random heating route and low efficiency. The welding seam of the aluminum alloy ship frame skin structure is concentrated and the frame restraint is large. It is difficult to control and eliminate the local convex deformation after welding. In order to improve the conventional orthopedic technology and improve the orthopedic efficiency, the pre-elastic deformation technology is proposed. Using the method of combining numerical simulation and experiment, the orthopedic effect of conventional and pre-elastic orthopedic technology is studied, and the influence of pre-deformation variables and heating path on deformation control of the frame skin structure after welding is simulated. The simulation results show that the technical key to the control of convex deformation lies in the control of the pre-elastic deformation and the setting of the heating route. The experimental verification results show that the pre-elastic deformation technology has a better control effect than conventional orthopedics, can significantly improve the orthopedic efficiency, and provides a new method for deformation control in the shipbuilding industry.