Device for removing an electrode tip

Abstract

Devices and methods for removing an electrode tip from a shaft of a resistance welder by turning the electrode tip. A holding member has a center of rotation with a first hole to receive the electrode tip and a claw disposed adjacent the first hole and mounted for rotation between an engagement position wherein at least a portion of the claw is positioned within the first hole to secure the electrode tip, and a disengagement position wherein the at least a portion of the claw is displaced from the first hole. A turning plate has a center of rotation coincident with the center of rotation of the holding member and defines a second hole at the center of rotation. The turning plate moves the claw from the disengagement position to the engagement position to secure the electrode tip in the first hole when the turning plate rotates in a first direction and to move the claw from the engagement position to the disengagement position to release the electrode tip from the first hole when the turning plate rotates in a second direction opposite the first direction. A brake operatively engages the holding member to substantially secure the holding member against movement during at least a first phase of movement of the claw from the disengagement position toward the engagement position. The holding member turns with the turning plate in the first direction after completion of the first phase of movement to turn the electrode tip.