Patent ID: 7640809
Filing Date: 2010-01-05
Classification: B23K,G01N

Abstract:
1. A spot welding inspecting apparatus comprising: a gun chip fitted to one end of an outer cylinder of a spot welding gun; a signal transmitting part mounted in the gun chip and configured to transmit a signal; an ultrasonic sensor having a cylindrical shape, one end of the ultrasonic sensor being brought into contact with the signal transmitting part; an inner cylinder inserted to the outer cylinder and holding the ultrasonic sensor; a through hole provided on the inner cylinder; a partitioning cylinder surrounding the through hole and inserted into a gap between the ultrasonic sensor and the outer cylinder, a front end of the partitioning cylinder reaching the signal transmitting part; a first flow path formed between the inner cylinder and the partitioning cylinder by passing the through hole from an inner portion of the inner cylinder; a second flow path formed at the gun chip to be circulated around a front end of the partitioning cylinder; and a third flow path formed between the outer cylinder and the partitioning cylinder, wherein the first, second and third flow paths are configured so that a cooling agent flows in an order of the first flow path, the second flow path and the third flow path.