| 摘要 |
PROBLEM TO BE SOLVED: To solve such problems as to be difficult to regularly arrange fine recessed parts and also, increase the manufacturing cost, in the conventional formation of the fine recessed parts using a shot-blasting, when the fine recessed parts are formed on the inner peripheral surface of a round hole. SOLUTION: An apparatus for working the fine recessed parts is provided with a roller supporting member 12, a forming roller 11 for forming the recessed parts and a compression coil spring 20 for bringing the forming roller 11 into pressure-contact with the inner peripheral surface Ba of a cylinder bore B in a tool holder 10 for rotation-driving. Further, this apparatus is provided with a main shaft head 2 for shifting the tool holder 10 in the direction along the center line of the cylinder bore B and a guide body 24 for guiding the forming roller 11 into the inner part of the cylinder bore B according to the descending movement of the tool holder 10 and thus, the high precise fine recessed parts are regularly formed and also, the reduction of the manufacturing cost is realized, and further, the shortening of the working time is realized by guiding the forming roller 11 into the cylinder bore B with the guide body 24 while rotation-driving the tool holder 10. COPYRIGHT: (C)2007,JPO&INPIT
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