| 摘要 |
PURPOSE:To keep off any damage to a cylindrical member during grinding operation as well as to aim at improvements in a yield rate ever so better, by filling up packing in a hollow hole of a cylinder composed of ceramics burned, while holding both ends with a holding shaft in between, and heating and removing the packing after grinding a circular ringlike groove. CONSTITUTION:A cylinder body 1 is mounted on a surface plate in making its shaft hole 2 endwise, while fusible alloys such as a wood's alloy and a Newton alloy or the like are filled up in this shaft hole 2, and when these alloys are solidified in one, each of center holes 5a and 5b is installed. And, each conical tip end of holding shafts 6a and 6b of a grinder is made to fit in these holes 5a and 5b, holding the cylinder body 1 in between. Next, a diamond-bonded grinding wheel 7 is fed to the cylinder body 1, and these holding shafts 6a and 6b are driven for rotation, forming a circular ringlike groove 8, then the cylinder body 1 is removed from these holding shafts 6a and 6b, and the whole lot of the cylinder body is heated whereby a filling part 3 is fused and removed. Thus, during operation of the grinding wheel 7, an impact attendant on intermittent contact is no longer added to the cylinder body 1 so that any damage to the cylinder body 1 is preventable and a yield rate is improved. |
