Patent ID: 8261960
Filing Date: 2012-09-11
Classification: B23K,Y10T

Abstract:
1. A method of pre-tensioning a breakaway fastener assembly for use in connecting a tooling member to an assembly device, the fastener assembly including a breakaway fastener, an upper and a lower annular plate each having a thickness positioned axially apart, a compression fastener independent of the breakaway fastener and a compression spring member, the method comprising the steps of: positioning the spring member between the upper and the lower plates; axially positioning the compression fastener through a bore in one of the upper or lower annular plates and removeably engaging the compression fastener in the other of the upper or the lower annular plate; axially compressing the spring member through advancing axial engagement of the compression fastener into at least a portion of the the thickness of other of the upper or the lower annular plate; and axially positioning the breakaway fastener through axially aligned bores in the upper and lower annular plates and in abutting axial engagement with the spring member removably and axially engaging the breakaway fastener with the assembly device opposite the abutting engagement with the spring member; and disengaging the compression fastener from the other of the upper or the lower annular plate thereby pre-tensioning the breakaway fastener through axial expansion of the spring member against the lower plate and the breakaway fastener before.