ASSEMBLY ACCURACY CONTROL METHOD FOR CAR BODY BY LASER SCAR

摘要

PURPOSE:To easily further well control assembly accuracy of a car body by providing a laser scar, serving as the reference point in the time of assembly, in two or more steel plate parts, forming the car body, to be discriminated and measured by a magnetic sensor and performing positioning and building or the like of each steel plate part. CONSTITUTION:In assembly of a car body, first for steel plate parts of front door 2, rear door 3, main body 4 and a center pillar 5, laser scars 1, linearly arranged even in every of vertical and lateral directions in a proper assembly condition, are provided as the reference point. And using an assembly jig or the like, temporary positioning is performed of each steel plate part 2 to 5. Next using a magnetic sensor, each laser scar 1 is discriminated and measured, thus a position relation between each steel plate part 2 to 5 is accurately detected. While being based on the detected position relation, a position of each steel plate part 2 to 5 is corrected and reconfirmed. Thereafter discriminating and measuring the laser scar 1 in an important part of the car body completed in its assembly, the car body is inspected for dimensions.