Numerical Simulation of Welding Quality of Reinforcement Framework Under Different Welding Sequence

The reinforcement framework is welded by the closed stirrup and the main reinforcement. The welding sequence of different welding points on the same stirrup has an important impact on the welding quality of the reinforcement framework. In order to optimize the welding sequence of reinforcement framework, the three-dimensional finite element model of reinforcement framework of six main reinforcement is established to simulate the maximum stress of reinforcement skeleton under three different welding schemes (Scheme 1: welding the upper and lower four welding points first and then welding the middle two welding points; Scheme 2: welding the middle two welding points first and then welding the upper and lower four welding points; Scheme 3: simultaneous welding of six welding points) Residual stress and strain are analyzed and compared to select the best welding scheme. The results show that the residual stress mainly occurs at the solder joint after welding, and the maximum stress value of the solder joint closest to the clamping end is 216.20 MPa. The thermal deformation caused by welding has little effect on the overall size. Compared with Scheme 1 and Scheme 3, the reinforcement framework welded under Scheme 2 has better welding quality.