WELDING OF BELLOWS USING PULSE MODULATION TYPE Nd-YAG LASER HAVING PEAK ENERGY

摘要

PPROBLEM TO BE SOLVED: To make good welding of a bellows in which the deformation in a welding part is reduced possible by reducing the deformation in the welding part to the full. PSOLUTION: In welding equipment for welding the outside diameter of a bellows on which chillings for diaphragm made of circular steel are joined using a pulse modulation type Nd-YAG laser, this equipment is provided with an optical fiber for transmitting a laser beam which is converged with a laser beam converging lens to the object of welding, a welding laser head on which a converging lens for increasing the energy density by converging the laser beam transmitted through the optical fiber on the welding part is attached, a stage where the x-axis, the y-axis and the z-axis are made variable, a tracking part for indicating the welding part by inputting to a monitor through a CCD camera, moving the welding laser head in real time and making welding possible by accurately detecting the welding part, a rotating part of the bellows and the diaphragm for fixing the bellows and the circular bellows diaphragm by interlocking with the tracking part and inducing constant rotation and a supplying means of argon or inert gas for preventing oxidation at welding. PCOPYRIGHT: (C)2005,JPO&NCIPI