| 摘要 |
<p>System and method for laser welding an inner surface of a small diameter tubular member. The system includes a laser for generating laser light and a mirror optically coupled to the laser for reflecting the light onto the inner surface of the tubular member to laser weld the inner surface of the tubular member. A rotator assembly is connected to the mirror for rotating the mirror in order to weld around the inner surface of the tubular member. The mirror and rotator assembly are each sized to be disposed in the tubular member at a location adjacent the portion of the tubular member to be welded. The rotator assembly has a spiral groove formed in the exterior thereof for receiving a cord wrapped around the exterior of the rotator assembly. An end of the cord is connected to a motor located externally to the tubular member, so that the cord is pulled as the motor is operated. As the cord is pulled, the rotator assembly rotates for rotating the mirror. A retainer is also provided for retaining the cord in the groove as the rotator assembly rotates. Therefore, the rotator assembly and the mirror associated therewith are rotated by a motor located externally to the tubular member. Thus, the system and method of the invention are capable of welding small diameter (e.g., diameters equal to or less than 0.313 inch) tubular members because the motor is located externally to the tubular member rather than being disposed in the tubular member.</p> |
