Patent ID: 6218637
Filing Date: 2001-04-17
Classification: B23K

Abstract:
A method for sizing a weld tool for forming a resistance spot weld to fasten a joint having at least two sheet metal members together, the weld tool having a body portion, a first electrode fixed to the body portion, and a second electrode coupled to the body portion and movable in position relative to the first electrode, the method comprising the steps of:providing a plurality of weld force curves;determining a governing metal thickness;determining a total thickness of the sheet metal members;determining a plurality of joint parameters, including a weld gap parameter, a thickness parameter, a strength parameter, an equalization parameter and a sheet stiffness parameter;using the plurality of joint parameters to select one of the plurality of weld force curves; andusing the governing metal thickness and the selected weld force curve to calculate a weld force parameter.