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    • 11. 发明专利
    • NUMERICALLY CONTROLLED AUTOMATIC LATHE
    • JPS63245302A
    • 1988-10-12
    • JP7420887
    • 1987-03-30
    • KISHI HIROSHI
    • KISHI HIROSHI
    • B23B3/00B23B7/00
    • PURPOSE:To simply improve machining efficiency and accuracy by providing a horizontally movable tool post with one or more drill setting posts arranged in the same direction and at the same level as a main spindle center line, plural tool holders arranged perpendicular to the center line and at the same level, and a guide bush for a long material. CONSTITUTION:A lathe has the horizontal main spindle which can move forward and backward and horizontally, a bush holder 2 fixed in front of the tip of the main spindle and a horizontally movable tool post 3 provided in front of the bush holder 2, and the tool post 3 can move horizontally and at a right angle to the main spindle. A collet chuck provided at the tip of the main spindle grasps work material with its longitudinal axis coinciding with a main spindle center line, and the tip of the slender work material is set so as to pass through the hole of the guide bush 2 and protrude further forward, resulting in machining made at the mouth of the guide bush 2. The slender work material can be therefore supported by the guide bush 2 and machined near its supported point to have excellent machining accuracy. A single tool holder 9 is provided at both the ends of the tool post 3 respectively, and a drill setting post 10 or a double tool holder 9' is demountably set between the tool holders 9. Thus the machining can be freely performed.