Method for automatically determining quality of a self-piercing riveting process

A method for automatically determining quality of a self-piercing riveting process, comprising the following operations:

• S1, inputting standard values, wherein standard values of riveting forces FB, FC, FD, standard values of slopes Kmax, Kmax/2 and KCDmin, and standard values of displacements of displacement point Xkmax and Xkmax/2 are input to a server;
• S2, acquiring data in real-time, wherein riveting forces F in the self-piercing riveting process and displacements X corresponding to the riveting forces F are acquired in real time through a data acquisition system, and measured values of riveting forces FB1, FC1, and FD1, measured values of slopes Kmax1, Kmax1/2, and KCDmin1, and measured values of the displacements of displacement point Xkmax and Xkmax/2 are acquired;
• and
• S3, comparing data and determining quality of riveting, wherein the measured values of the riveting forces FB1, FC1 and FD1, the measured values of the slopes Kmax1, Kmax1/2 and KCDmin1, and the measured values of the displacements of displacement point Xkmax1 and Xkmax1/2 are compared with the standard values of the riveting forces FB, FC, and FD, the standard values of the slopes Kmax, Kmax/2, and KCDmin, and the standard values of the displacements of displacement point Xkmax and Xkmax/2 in the server correspondingly;
• and quality of the self-piercing riveting process is automatically determined.