B - Operations – Transporting – 23 – K
Patent
B - Operations, Transporting
23
K
B23K 9/02 (2006.01) B23K 11/25 (2006.01)
Patent
CA 2081514
11 METHOD FOR MONITORING WELD QUALITY IN MASH SEAM WELDING ABSTRACT When mash seam welding sheet-metal plates (11,12) with overlapping edges between roller electrodes (13,14), the quality of the weld - given that the process parameters (compressive force F of the roller electrodes, rate of advance v, current intensity I through the weld) are observed and/or controlled - is also dependent upon the width of overlap (b) of the plate edges at the weld joint. Because it is difficult to measure the actual overlap in production, the thickness (ts) of the weld seam is recorded by way of a substitute. For given workpiece data and corresponding weld parameters, this thickness is in direct correlation with the width of the overlap (b). The functional correlation ts = f(b) can be established empirically and enables the actual value of the overlap to be calculated on the basis of the seam thickness measured. The thickness of the seam may either be measured at the weld location by measuring the spacing of the roller electrodes (position encoder 16) or at the finished weld seam (measuring device 17). In place of the correlation ts = f(b) it is also possible to evaluate the correlation of ts with another operating parameter in analogous fashion.
Schreiner Jurg
Weibel Peter
Elpatronic Ag
Robic
LandOfFree
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