| 摘要 |
<p>PROBLEM TO BE SOLVED: To perform the cladding on an inner circumferential surface of a bent tube such as an elbow. SOLUTION: A laser beam cladding equipment is provided with a rotary table 23 capable of concentrically setting elbows 69 which are bent in an arc- shaped manner relative to the center O of rotation in the plan view, an optical fiber 67 which is inserted in a hollow of a hollow shaft 63 whose tip side is polygonally bent in the circumferential direction and in hollows of universal joints 64, 65, 66, a converging lens 58 to converge the laser beam 68 projected from the optical fiber 67, and a reflecting mirror 62 which is stored in a rotary hollow mirror supporting cylinder 61 and reflects the laser beam 68 from the converging lens 58 for irradiation of the laser beam onto an inner circumferential surface of the elbows 69.</p> |
