Center Frame of CNC Machine Tool

摘要

A center frame for supporting a workpiece includes a lower seat, and an upper seat pivotable relative to the lower seat between a clamping position, where the upper seat cooperates with the lower seat to define a clamping opening for receiving and clamping the workpiece, and a releasing position, where the upper seat is rotated away from the lower seat. A clamping unit includes first, second and third abutment support units, each of which has an abutment portion located in the clamping opening, and an operating portion opposite to the abutment portion. The operating portion of each of the first to third abutment support units is operated to move the abutment portion to abut against or away from the workpiece.

主权项

1. A center frame of a CNC machine tool for supporting a workpiece, the workpiece defining a longitudinal axis, said center frame comprising:
a lower seat; an upper seat pivoted to a top end of said lower seat and pivotable about an axis which is parallel to the longitudinal axis, said upper seat being pivotable relative to said lower seat between a clamping position, where said upper seat cooperates with said lower seat to define a clamping opening for receiving and clamping the workpiece, and a releasing position, where said upper seat is rotated away from said lower seat; and a clamping unit including a first abutment support unit disposed on a bottom portion of said lower seat, a second abutment support unit disposed on said lower seat in proximity to said top end thereof, and a third abutment support unit disposed on one end of said upper seat distal from said top end of said lower seat, each of said first, second and third abutment support units having an abutment portion located in said clamping opening, and an operating portion opposite to said abutment portion, said operating portion of each of said first, second and third abutment support units being operated to move said abutment portion to abut against or away from the workpiece, so that the workpiece is clamped among said first, second and third abutment support units when said abutment portions of said first, second and third abutment support units abut against the workpiece.