METHOD OF MEASURING UPSET FORCE IN CONTACT BUTT WELDING Russian patent published in 2013 - IPC B23K11/04 B23K37/04 

FIELD: process engineering.

SUBSTANCE: invention may be used in strip welding at special contact welding machines by continuous burning-off or resistance. Top and bottom box-like measuring elements are fitted in welding machine in place of jaws. Said elements comprise strain gages integrated in measuring half-bridges glued on their vertical walls. Thickness of said vertical walls are selected with due allowance for relationship between period of their intrinsic oscillations at impact load and upset duration that makes, at least, 0.01. Strain gages of every half-bridge are connected in series opposition. Point of integration of every half-bridge is arranged at, at least, one metre from welding zone. Bridge unbalance current is measured at horizontal strain of aforesaid vertical walls by upset force transferred via clamped part.

EFFECT: stable accuracy at optimum welding conditions.

1 dwg