| 摘要 |
PURPOSE:To precisely grind a work by forming an annular groove on the external surface of a rotary body on the spindle of a machine tool, turning this rotary body, moving the work in the direction of the Z-axis, pressing it against the rotary body, and moving the work in the direction of the X-axis according to the pressing force or reciprocating the work in the direction of the Y-axis. CONSTITUTION:A metal block retained on the main spindle of a machine tool is turned and ground in the form of a rotary body 2 under the control of a computer and simultaneously, an annular groove 2a is formed on the external surface of the rotary body 2 during the turning and grinding operation. Then with abrasive grain supplied, the rotary body is turned on the main spindle and the work 1 held on an X-Y-Z-axis stage 3 is moved in the direction of the Z-axis until pressed by the rotary body 2. The work is moved in the direction of the X-axis while the pressing force is being measured by a pressure sensor 8 and controlled, and also moved in the reciprocating orbit 3a on the Y-axis plane, whereby grinding the surface of the work 1. As a result, the shaping precision for the work 1 is improved in both the longitudinal direction and the lateral direction and the suitable surface roughness may be provided. |
