Jig device and jig unit

A jig device of a workpiece in a machine tool, the jig device comprising:

• a holding mechanism that holds the workpiece in a cantilevered state;
• and
• a spindle-direction support mechanism including at least one spindle-direction support member disposed to face the workpiece from a side opposite to a spindle of the machine tool in a spindle direction with respect to the workpiece held in the cantilevered state by the holding mechanism, the spindle-direction support mechanism including a spindle-direction drive unit that drives the spindle-direction support member in the spindle direction between a spindle-direction support position in contact with the workpiece and a spindle-direction retracted position separated from the workpiece;
• wherein the holding mechanism includes a first rotation mechanism that rotates the workpiece about a first rotation axis line orthogonal to the spindle direction, and a second rotation mechanism that rotates the workpiece about a second rotation axis line orthogonal to the spindle direction and the first rotation axis line.

A jig device of a workpiece in a machine tool, the jig device comprising:

• a holding mechanism that holds the workpiece in a cantilevered state;
• a spindle-direction support mechanism including at least one spindle-direction support member disposed to face the workpiece from a side opposite to a spindle of the machine tool in a spindle direction with respect to the workpiece held in the cantilevered state by the holding mechanism, the spindle-direction support mechanism including a spindle-direction drive unit that drives the spindle-direction support member in the spindle direction between a spindle-direction support position in contact with the workpiece and a spindle-direction retracted position separated from the workpiece;
• and
• a restraint mechanism that restrains a part of the workpiece to restrict displacement of the workpiece in the spindle direction when the workpiece is machined in a state where the holding mechanism holds the workpiece,
• wherein the restraint mechanism is disposed at a position to sandwich the spindle-direction support mechanism with the holding mechanism.

A jig unit for a jig device of a workpiece held in a cantilevered state in a machine tool, the jig unit comprising:

• a spindle-direction support mechanism including a plurality of spindle-direction support members disposed to face the workpiece from a side opposite to a spindle of the machine tool in a spindle direction with respect to the workpiece held in the cantilevered state, the spindle-direction support mechanism including a spindle-direction drive unit that drives the spindle-direction support member in the spindle direction between a spindle-direction support position in contact with the workpiece and a spindle-direction retracted position separated from the workpiece;
• and
• a second-axial-direction support mechanism including a second-axial-direction support member that faces the workpiece in a second axial direction when a first axial direction orthogonal to the spindle direction and the second axial direction orthogonal to the spindle direction and the first axial direction are defined,
• wherein the spindle-direction drive unit drives some of the plurality of the spindle-direction support members at positions corresponding to a shape of the workpiece, among the plurality of spindle-direction support members at the spindle-direction retracted positions to the spindle-direction support positions according to control by a control device of the machine tool,
• one end of the workpiece in the first axial direction is held,
• the second-axial-direction support mechanism includes a second-axial-direction drive unit that drives the second-axial-direction support member in the second axial direction between a second-axial-direction support position in contact with the workpiece and a second-axial-direction retracted position separated from the workpiece, and
• the second-axial-direction support mechanism is configured to be capable of changing a position of the second-axial-direction support member on a parallel plane parallel to the spindle direction and the first axial direction.