中文摘要：

为了促进回填式搅拌摩擦点焊（Friction Stir Spot Welding,FSSW）技术在工业领域的应用,对回填式FSSW设备进行了设计。在充分调研国内外相关参考文献的基础上,并综合考虑设备的焊接效率以及承载能力,确定了设备的设计参数。将设备的机械结构分为驱动系统、传动系统、执行系统以及支承系统,并分别对其方案进行了设计。根据设计参数以及设计方案,采用模块化的设计思想,对设备的机械结构进行了设计,并完成了样机的开发。基于三菱PLC以及触摸屏,设计了设备的控制系统。利用所开发的样机分别对6061铝合金、AZ91镁合金以及黄铜进行了焊接试验,均得到了外观平整、性能良好的焊点。并对2 mm＋2 mm的6061-T6铝合金试样的焊点进行了拉伸剪切试验,在转速为1300 r/min,扎入/回填速度为60 mm/min,扎入深度为2.5 mm的工艺参数下,单个焊点承受的平均拉剪力可达到7287 N。

英文摘要：

To promote the application of refill friction stir spot welding technology in the industrial field, a FSSW equipment was designed. On the basis of investigation and study of relevant references at home and abroad, and considering the welding efficiency and carrying capacity of the equipment, the design parameters of the equipment were determined. The mechanical structure of the equipment was divided into drive system, transmission system, execution system and supporting system, and the scheme was designed. According to the design parameters and the design scheme, the mechanical structure of the equipment was designed and the development of the prototype was completed by using the modular design idea. Based on the MITSUBISHI PLC and touch screen, the control system of the equipment was designed. The welding experiments of 6061 aluminum alloy, AZ91 magnesium alloy and brass were carried out by the developed prototype, and the solder joints with good appearance and good performance were obtained. The tensile shear test was carried out on the 6061-T6 aluminum alloy specimen of 2 mm＋2 mm, and the average tensile stress of the solder joint can reach 7287 N at tool rotation speed of 1300r/min, plunge/refill speed of 60 mm/min, plunge depth of 2.5 mm.