Abstract
Abstract
MIG welding and butt joints are commonly used in fabrication processes across various industries. Challenges in the seat air spring component localization project necessitated the switch to SAPH 540 U-channel material to mitigate financial risks associated with minimum order policies. This research focuses on examining the temperature distribution, residual stress, and distortion induced during the MIG welding process of SAPH 540 U-channel butt joints using a numerical method approach through FEA simulation software. The study aims to determine the optimal welding parameters by varying three welding currents: 130 A, 150 A, and 200 A. The results show that the highest temperature (3221.3°C) and the highest residual stress (von Mises, 441.97 MPa) occur at 200 A, while the lowest values (2103.2°C and 373.292 MPa) occur at 130 A. All three variations exhibit bending distortion and longitudinal shrinkage. The lowest distortion value at 130 A is 0.0090196 mm, and the highest at 200 A is 0.018751 mm. The simulation modeling indicates that a welding current of 130 A is recommended to achieve minimum residual stress and distortion, serving as a reference for future welding processes.