关键词: SPR 技术；机械连接；铸铝件；板材开裂

Abstract: Semi-tubular punch riveting (SPR) belongs to mechanical connection, and is one of the common connection techniques in the welding of automobile body in white. In actual production, SPR technology is mainly used for dissimilar metal connection, especially for cast aluminum parts, but cast aluminum parts are easy to crack because of high pressure, so the performance indicators of cast aluminum parts are very high. This paper mainly uses the combination of material analysis and field verification to explore the causes of plate cracking from materials, parameters, riveting points and other related aspects, and finally comes up with solutions and related prevention methods. At the same time, in order to facilitate understanding, the paper introduces the principle of SPR technology and equipment composition. It has practical guiding significance to solve the problems in production through exp

Key words: SPR technology; Mechanical joining; Cast aluminum parts; Plate materials crack