NC machine tool
AssigneeKitamura Machinery Co., Ltd.
InventorsKoichiro Kitamura, Akihiro Kitamura, Kosaku Kitamura
Life of this patent
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Abstract
A NC machine tool having a constitution in which a table (15, 115) for placing a work thereon and a spindle (14, 114) for setting a tool are relatively moved by three feed mechanisms (18-20, 118-120), for X-axis, for Y-axis, and for Z-axis, to carry out machining. A preload is applied to all the three feed mechanisms (18-20, 118-120), for X-axis, for Y-axis, and for Z-axis, using a rack-pinion (21, 22, 24, 25, 27, 28, 121, 122, 124, 125, 127, 128), and using two motors (16, 23, 29) for each axis to prevent backlash in the rack-pinion.
Claims2
A NC machine tool having a table for placing a work thereon and a spindle for setting a tool and three feed mechanisms for moving the spindle relative to the table, on the X-axis, the Y-axis, and the Z-axis, respectively, to carry out machining, wherein a preload is applied to all the three feed mechanisms, wherein each feed mechanism includes a double helical rack-pinion, and wherein each double helical rack-pinion includes one rack, two pinions engaging the one rack and two motors respectively driving the two pinions, to prevent backlash in the double helical rack-pinion.
Dependencies are inferred from the claim text.