搅拌摩擦焊在新能源汽车电池下壳体焊接工艺中的应用

Application of Friction Stir Welding in the Welding Process of Battery Undershell of New Energy Automobile

介绍了搅拌摩擦焊的原理及优点、电池下壳体的结构、搅拌摩擦焊系统及生产工艺流程,针对搅拌摩擦焊技术在新能源汽车电池下壳体焊接工艺中的应用,利用机器人搅拌摩擦焊对焊接工艺参数及母材连接方式进行了试验研究,得到优化后的主轴转速S、焊接速度F、下压力P及工件连接方式,提高了焊缝融合度和接头稳定性,且焊接接头的抗拉强度均能达到母材标准抗拉强度的70%以上,表明该工艺方法在焊接速度、节能环保和产品质量等方面具有一定的优势。

The principle and advantages of friction stir welding, the structure of the lower battery shell, the friction stir welding system and the production process were introduced. For the application of the friction stir welding technology in the welding process of the lower shell of the new energy vehicle battery, the robot was used for friction stir welding. The welding process parameters and the connection method of the base metal were experimentally studied, and the optimized spindle speed S, welding speed F, down force P and workpiece connection method were obtained, which improved the welding seam fusion and joint stability, and the workpiece was tested after welding. The tensile strength of the sheets can reach more than 70% of the standard tensile strength of the base material, indicating that the process method has certain advantages in welding speed, energy saving, environmental protection and product quality.