| 摘要 |
PURPOSE:To decrease improper products by providing a cylinder end detector, detecting part, rotary pulse generator, signal processing part, operation processing part and control command part, and grinding a defect part on the outer surface of the cylinder and its vicinity without leaving step gaps, in a beautiful manner. CONSTITUTION:A cylindrical tube 1A, wherein marking material is applied to its defect part, is advanced rightwards by a drive motor 33 of a cylindrical tube retainer 11 while rotated by a motor 27. The tube 1A stops according to the command of a control command part 53 when the rear end of the tube 1A passes by a marking material application detector 54. Then the tube 1A starts to retreat and stops as it makes the marked part end opposite to a grinder 43, while the grinder 43 descends to perform grinding. The grinder 43 performs a reciprocating movement with a small width in an axial direction by the help of a pressure increasing machine and a large gear, while the grinder 43 is pressed to the cylindrical tube 1A strongly or softly according to the piston's position of the pressure increasing machine. The cylindrical tube 1A also perform a reciprocating rotary movement with a little width by means of a jib and a link. Thus, the tube 1A is ground without leaving step gaps thereon by providing inclined faces on and in the vicinity of the marked position. |
