Dengensha Manufacturing Company Limited

Toshio Murai

Yoshiaki Iwamoto

A resistance spot welder includes: a motor, having a shaft; a cylindrical casing; a hollow guide rod, inserted into the casing, and adapted to be moved linearly for moving a first electrode tip facing a second electrode tip provided at a gun arm; a ball nut, fixed in an inner circumference of the guide rod; a ball screw, fitted through the ball nut; a coupling, including a first fastening portion into which the shaft of the motor is inserted and a second fastening portion into which the ball screw is inserted and which is opposite to the first fastening portion; and a bearing, fitted between an outer circumference of the first fastening portion and an inner circumference of the casing. The guide rod is moved between a first point which is a motor side and a second point which is an electrode tip side. When the guide rod is positioned at the first point, the guide rod accommodates at least a part of the second fastening portion.

Resistance spot welder

A resistance spot welder including a first plate, a second plate rotatably connected to the first plate through a shaft and driven on the shaft by an actuator, gun arms removably fixed on and electrically insulated with the first and second plates, and electrode tips confronting each other and fixed on the gun arms.

Growing community of inventors

Kanagawa, Japan

Toshio Murai