Patent ID: 7939780
Filing Date: 2011-05-10
Classification: B23K

Abstract:
1. A weld abnormality determination and estimation device for a product, the device comprising: a jig device for holding the product by a holding face, through which the jig device and the product are in close contact with each other; an AE sensor for detecting an elastic wave in the jig device; and a controlling device for determining and estimating a presence or absence of an abnormality of a welding penetration depth, and abnormality of a welding bead length and an abnormality of a welding skip in a laser welding process based on the elastic wave detected by the AE sensor, wherein the controlling device discriminates between the welding penetration depth, the welding bead length and the welding skip; the jig device performs a positioning of a welded area in the product by rotating the product; and the AE sensor is provided in the jig device.