| 摘要 |
The invention can be used in shipbuilding and plant construction, in particular for manufacturing structural parts of large volume. The characterising feature is that a radiation receiver is fastened to a perpendicular body, preferably to the pivot of the perpendicular body, and the perpendicular body is arranged on a rest of a welding or cutting unit, a damping member being inserted between the perpendicular body and the rest, and a flat funnel diaphragm being arranged around the radiation receiver with main orientation to the laser beam, the ratio of funnel height to funnel length not exceeding the value 2, and the width of the funnel being the width of the width of the optically active area of the radiation receiver. The funnel length is greater than the width of the optically active area of the radiation receiver, the inner walls being coated matt black. |
