US 12,109,642 B2
Method for resistance welding
Baifan Zhou, Leonberg (DE); Damir Shakirov, Niefern-Oeschelbronn (DE); Fabian Bleier, Stuttgart (DE); Juergen Haeufgloeckner, Schneeberg (DE); Martin Dieterle, Ludwigsburg (DE); Sean McConnell, Hirschhorn am Neckar (DE); Sinisa Slavnic, Bremen (DE); and Tim Pychynski, Karlsruhe (DE)
Assigned to Robert Bosch GmbH, Stuttgart (DE)
Filed by Robert Bosch GmbH, Stuttgart (DE)
Filed on Mar. 12, 2021, as Appl. No. 17/199,904.
Claims priority of application No. 102020204667.0 (DE), filed on Apr. 14, 2020.
Prior Publication US 2021/0316388 A1, Oct. 14, 2021
Int. Cl. B23K 11/25 (2006.01)
CPC B23K 11/255 (2013.01) [B23K 11/257 (2013.01); B23K 11/258 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A method for resistance welding, comprising:
performing a plurality of resistance welding processes;
pressing, during each of the plurality of resistance welding processes, welding electrodes against a respective welding spot of respective workpieces based upon respective prescribed welding parameters;
energizing the welding electrodes with a respective welding current for each of the plurality of resistance welding processes;
determining, for each of the plurality of resistance welding processes, a respective at least one characteristic value that characterizes a quality of the welding;
performing a statistical analysis of the determined at least one characteristic value for each of the plurality of resistance welding processes; and
determining, based upon the analysis, an adaptation of the prescribed welding parameters,
wherein the performing of the statistical analysis is performed based upon a median of spattering times at which welding spatter occurs during each of the plurality of resistance welding processes,
wherein the performing of the statistical analysis is performed based upon a dispersion of spattering times at which welding spatter occurs during each of the plurality of resistance welding processes, and
wherein the performing of the statistical analysis is performed based upon a difference of the median of the spattering times, and a product of a standard deviation of the spattering times at which welding spatter occurs during each of the plurality of resistance welding processes and a prescribable constant.