Machine tool
AssigneeOkuma Corporation
InventorShoichi Morimura
Life of this patent
Estimating the term…
Abstract
A machine tool which removal-machines a workpiece by means of a tool includes a retaining device (a workpiece spindle and a tailstock) that retains the workpiece, a support device (an in-machine robot) that supports the workpiece, in order to suppress deflection of the workpiece retained by the retaining device, and a control device that controls driving of the support device by force control having a force as a control target. Specifically, a supporting force by the support device and a machining force by a tool are measured, and the driving of the support device is controlled so that the supporting force is equal to the machining force.
Claims13
A machine tool which removal-machines a workpiece, comprising:
- a tool;
- a retaining device that retains the workpiece;
- a support device that supports the workpiece, in order to suppress deflection of the workpiece retained by the retaining device;
- a control device that controls driving of the support device by force control having a force as a control target;
- a supporting force measurement unit that measures a supporting force of the workpiece by the support device;
- and
- a machining force measurement unit that measures a machining force of the workpiece by the tool, wherein
- the control device force-controls the support device based on a comparison result of the measured supporting force and the measured machining force.
A machine tool which removal-machines a workpiece, comprising:
- a tool;
- a retaining device that retains the workpiece;
- a support device that supports the workpiece, in order to suppress deflection of the workpiece retained by the retaining device;
- a control device that controls driving of the support device by force control having a force as a control target, and
- a retaining force measurement unit that measures a retaining force of the workpiece by the retaining device, wherein
- the control device force-controls the support device based on a comparison result of an initial retaining force measured before machining by the tool and before supporting by the support device, and a comparison retaining force measured during the machining by the tool and during the supporting by the support device.
A machine tool which removal-machines a workpiece, comprising:
- a retaining device that retains the workpiece;
- a support device that supports the workpiece, in order to suppress deflection of the workpiece retained by the retaining device;
- and
- a control device that controls driving of the support device by force control having a force as a control target, wherein
- the control device force-controls the support device based on a comparison result of the measured supporting force or the measured machining force with a theoretical value of the supporting force or the machining force determined based on a machining condition.
A machine tool which removal-machines a workpiece, comprising:
- a retaining device that retains the workpiece;
- a support device that supports the workpiece, in order to suppress deflection of the workpiece retained by the retaining device;
- and
- a control device that controls driving of the support device by force control having a force as a control target, wherein
- the support device comprises:
- a multi-degrees-of-freedom robot;
- and
- an end effector attached to the multi-degrees-of-freedom robot, and
- the end effector contacts the workpiece and supports the workpiece.
Dependencies are inferred from the claim text.