Patent ID: 7170026
Filing Date: 2007-01-30
Classification: B23K

Abstract:
1. An arc discharge welding device for welding a first component to a second component and including a welding tool with a head for holding the first component and a motor for moving the head toward and away from the second component, and including a controller for controlling a supply of electric power for forming an arc discharge between the first and second components and for operating the motor, wherein the controller is constructed to operate the motor to move the head with the first component in a first direction toward the second component to press the first component into the second component and to depress the second component by an amount corresponding to a sink-in depth with respect to a reference plane, and then to move the head with the first component in an opposite direction by an amount corresponding approximately to the sum of the sink-in depth and a predetermined lift-up height, and wherein the controller is constructed to cause an arc discharge to be formed between the lifted first component and the second component and then to operate the motor to move the head with the first component in the first direction again to press an arc-discharge-melted portion of the first component into an arc-discharge-melted portion of the second component and to depress the melted portion of the second component by an amount corresponding to the sum of the sink-in depth and a predetermined push-in depth, so that the first component is welded to the second component, and then to operate the motor to move the head in the opposite direction again to release the first component from the head of the welding tool.