| 摘要 |
A saw consists of a row of wires which travel in a reciprocating or continuous motion between two wire guide cylinders, each made from a rotary mantle (7) turning on a fixed central shaft (5). The shaft, made in one piece or two halves, is supported rigidly at both ends by the saw frame and has bearings (8) between it and the mantle. The bearings have balls, rollers, needles, or a hydraulic or pneumatic film. The rotary mantle is made from a material with a low coefficient of expansion, e.g. an Fe-Ni alloy, and a fluid can be circulated through it to control its temperature. It can also have a protective coating (9) of polyurethane. |
