Patent ID: 6812428
Filing Date: 2004-11-02
Classification: B23K,B25B

Abstract:
A clamping device for clamping the overlapped edges of metal sheets to be connected by laser welding, comprising:a box-shaped head having a longitudinal axis; a clamping arm pivotally connected to the head to rotate between an open condition, a closed condition in which the overlapped edges of the metal sheets (S1, S2) are pressed against each other, and an intermediate welding condition in which the overlapped edges of the metal sheets (S1, S2) are slightly spaced apart from each other to allow the laser welding; an electric control actuator; a toggle lever mechanism operatively connected between the clamping arm and the electric control actuator, said toggle lever mechanism being connected to the electric control actuator by intermediate transmission members; and counteracting biasing means for compensating clearances in the operative connection between the clamping arm and the electric control actuator; said counteracting biasing means being constructed and disposed to rearwardly urge the clamping lever in the closed condition of the clamping mechanism.