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US 2011/0085869 A1Published application
Machine Tool
AssigneeHitachi, Ltd.
InventorsHideaki ONOZUKA, Koji Utsumi, Toshio Yamanaka, Masayuki Kyoi
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AssigneeHitachi, Ltd.
InventorsHideaki ONOZUKA, Koji Utsumi, Toshio Yamanaka, Masayuki Kyoi
Estimating the term…
The table on which a workpiece is put can travel on a guide rail mechanism relative to a working head with a cutting tool mounted thereon. The table is connected through a nut to a ball screw part to move in an axial direction thereof as the ball screw part rotates. One end of the ball screw part is supported by a bearing and the other end is connected to a servomotor to be rotationally driven. A hollow part is provided in the table to receive therein a damper mechanism part, which comprises a spring, a damper, and a weight, the table and the weight being arranged to enable traveling separately on guide rails. Thereby, even when the workpiece is heavy, the weight can move relative to the table to effectively damp vibrations of the table in a feed direction.
A machine tool making use of a rotating cutting tool to work a workpiece put on a cutting work table traveling on first guide rails with the use of torque of a ball screw part and wherein a damper mechanism part is mounted in a cavity provided on an opposite side of the table to that surface thereof, on which the workpiece is put, said damper mechanism comprising a weight, a spring and a damper, one ends of the spring and the damper being connected to an inner wall of the table with a vibratory direction of the spring agreeing with a moving direction of the table, the other ends of the spring and the damper being connected to the weight, and the weight being arranged in a manner to travel on second guide rails.
A machine tool making use of a rotating cutting tool to work a workpiece put on a cutting work table traveling on a first guide rails with the use of torque of a ball screw part, wherein a weight is connected through a spring and a damper to a surface of the table perpendicular to a direction, in which the table travels, and the weight is arranged in a manner to travel on a second guide rails.
A cutting work table for a machine tool making use of a rotating cutting tool, said cutting work table comprising:
Dependencies are inferred from the claim text.