| 摘要 |
PURPOSE: To enhance the cutting accuracy by providing a fixing base, a cutting unit movable up and down with respect to the fixing base through a first drive means, and a telescopic unit movable up and down with respect to the cutting unit through a second drive means. CONSTITUTION: A fixing base comprises a support 28 fixed to a vertical slider 30 on a horizontally reciprocal table 32. The reciprocal table 32 is provided with a jack 34 for regulating height of the support 28. A frame 36 is provided with a vertical column 38 secured to the support 28 and indexing a cutting unit 20 vertically while supporting a jack 22. The unit 20 comprises an upper plate suspended from the piston of the jack 22 and coupled with a piston, and a table 50 coupled through a column 51. A plurality of hollow shafts 52 are turned simultaneously by a motor 54. A telescopic unit 24 comprises upper and lower plates suspended from a jack 26 and fitted slidingly in the column 51. Core rods 58 suspended from the lower plate 56 of the unit 20 has the same number and distribution as the hollow shafts 52 and telescopes the hollow shaft 52. |
