Inverse determination of maximum heat flux and welding size in laser spot welding

Abstract

In this work, the maximum heat flux and the welding size of laser
spot welding are estimated by the inverse sequential method. The
advantages of this method are that the function form for the unknown
laser heat flux is not necessary to be preselected and the heat fux
estimation process is performed time step by time step until the end of
the process. A general case with the maximum laser heat flux
beingthe exponential function of heating time was investigated. The
estimated results showed that the maximum laser heat flux inversely
estimated by the proposed method have good approximation to the
exact value. Based on the results of the estimated heat flux, the
welding width and depth in the spot laser welding was also
determined accurately.