| 摘要 |
PURPOSE:To obtain a mirror surface which has satisfactory surface roughness and flatness ranging in a wide area and is even locally free of surface defects by roughly grinding a titanium plate by abrasive stones with a specified value of polishing pressure, and thereby giving finishing polish to said surface with abrasive cloths thereafter. CONSTITUTION:A titanium plate is ground by abrasive stones with polishing pressure equal to or more than (40-X/160)g/cm<2> but less than (110-X/180)g/cm<2>, then, finishing polish with abrasive cloths is given thereto thereafter. In this case, X represents the grading of abrasives specified by JIS-R-6001. Thus, polishing pressure is regulated in accordance with the grading of abrasives in grinding with stones, the mirror surface of the titanium plate ranging in a wide area can thereby be obtained with no complex operation required, which is free of surface defects with satisfactory surface roughness as well as excellent flatness. |
