| 摘要 |
<p>PURPOSE:To improve machining accuracy by providing an injection nozzle for blowing cold air against the outer peripheral surface of a workpiece and maintaining said outer peripheral surface of the workpiece at a constant tolerable temperature. CONSTITUTION:Both ends of a workpiece W are rotated at a defined peripheral speed by means of a supporting device, while a grinding member 36 which is placed opposite to the workpiece W, is also rotated at a defied peripheral speed. While blowing a cold air against outer peripheral surface of the rotating workpiece W from an injection nozzle 56, a grinding tool rest 104 is moved by a defined depth of cut perpendicularly to the workpiece W while a reciprocatingly moving device is moved parallel with the workpiece W, to grind the workpiece W by means of a grinding member 36. The cold air which is blown against the outer peripheral surface of the workpiece W maintains the surface at a constant tolerable temperature, while preventing the grinding member 36 from being clogged. As a result, the machining accuracy of the workpiece, or a rubber roll W becomes favorable.</p> |
