To provide an inner diameter grinding method which equalizes the diameter expansion amount of each grinding portion even when a plurality of grinding portions (grinding stones) are provided in the axial direction.
When a thrust motor 13 is driven and a draw bar 12 is pulled for diameter expansion of the grinding portion 8, the elongation of the draw bar 12 on the proximal end side is small and becomes larger on the end side. When the elongation becomes larger, the diameter expansion amount of the grinding portion 8 on the end side becomes smaller. As a result, when the draw bar 12 is pulled, the cylinder 26 is driven to pull a tool holder 7 in the opposite direction to the draw bar 12 at the same time. The proximal end side of the tool holder 7 is fixed onto a main spindle 5; therefore, when the tool holder 7 is pulled, the end side extends. Adjusting a tensile force through the cylinder 26 so that the elongation amount and an elongation amount of the draw bar 12 on the end side become equal to each other, the diameter expansion amounts of the respective grinding portions 8 become equal to each other.
UTSUMI REI
ASAI NOBUHIRO
| JPH0326407A | 1991-02-05 | |||
| JPH03208507A | 1991-09-11 | |||
| JPH10249706A | 1998-09-22 | |||
| JPS637265A | 1988-01-13 | |||
| JP2007253292A | 2007-10-04 | |||
| JP2006239835A | 2006-09-14 | |||
| JPH0326407A | 1991-02-05 | |||
| JPH03208507A | 1991-09-11 | |||
| JPH10249706A | 1998-09-22 | |||
| JPS637265A | 1988-01-13 | |||
| JP2007253292A | 2007-10-04 | |||
| JP2006239835A | 2006-09-14 |
Osamu Kataoka