| 摘要 |
PROBLEM TO BE SOLVED: To provide a line boring device capable of stabilizing the discharge pressure and discharge quantity of mist of atomized cutting fluid. SOLUTION: This line boring device 1 comprises at least a rotatable and axially movable arbor 5 having tools 7-9, and support parts 10, 20, 30 for supporting the arbor 5, and cuts the inner surfaces of crankshaft bearing holes 51a-51e with the tools 7-9 by the rotation and axial movement of the arbor 5 in the state of being supported by the support parts 10, 20, 30 and inserted in the crankshaft bearing holes 51a-51e. The arbor 5 has a passage 32 in the arbor, and an intermediate support part 20 has a passage 32 in the support part, and a recessed part 33 formed at a support face for supporting the arbor 5. The mist is supplied from a mist generator 41 to the tools 7-9 on the tip side from the intermediate support part 30 through the passage 32 in the support part, the recessed part 33 and the passage 6 in the arbor. COPYRIGHT: (C)2005,JPO&NCIPI
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