DETECTION OF BEVELING EDGE

摘要

PURPOSE:To perform the detection of a beveling edge part of good accuracy by focusing the reflecting light of a slit, etc. irradiating on a beveling face and base material from the slant upper part on a slit plate and by subjecting only the reflecting light passing the inside of the slit to a one dimentional signal processing. CONSTITUTION:A slit light or scanned 30 spot light 22 is irradiated at right angles with the longitudinal direction of beveling at the angle of 30-60 deg. from the light source 12 of the slant upper part in beveling longitudinal direction of a base material 1. The reflecting light of these irradiating lights is focused for image formation on the slit plate 26 having a long and slender slit 24 in the direction intersecting at right angles with the beveling longitudinal direction by the objective lens 23 having an image magnification (m). The width of the slit of this case is 0.5mm. for instance. The transmitting light passing through the slit 24 thereof only is detected by a detector 25 and the output signal thereof is subjected to one dimentional process by a signal processing circuit 31, and the position of the beveling edge part is detected. It is thus made easy to provide a profile device on each torch provided to a tandem even in a multilayer welding and the elevation in welding quantity can be taken place.