Machine tool and control device for machine tool
AssigneesCitizen Watch Co., Ltd., Citizen Machinery Co., Ltd.
InventorToshiyuki SUZUKI
Life of this patent
Estimating the term…
Abstract
A machine tool and a controller for the machine tool that accurately detect a defect in a cutting-off process due to breakage of a cutting-off bit and the like is provided. The machine tool includes: a spindle 110 for holding one end side of a workpiece W; an opposed chuck 131 that is opposed to the spindle 110 and is movable with holding another end side of the workpiece W; and a spindle moving motor 122 for moving the spindle 110. The machine tool or the controller is provided with a load detector 172 for detecting a load of the spindle moving motor 122, and workpiece separation detector 173 for detecting a defect in a cutting-off process from the load in performing a taking out operation.
Claims7
A machine tool comprising:
- a spindle holding one end side of a workpiece;
- an opposed chuck opposed to the spindle and movable in a direction away from the spindle while holding another end side of the workpiece;
- a spindle moving motor for moving the spindle;
- and
- a controller configured to perform a cutting-off process of cutting the workpiece to separate a machined portion of the workpiece and an unmachined portion of the workpiece while holding the workpiece by the spindle and the opposed chuck, and to perform a taking out process of moving the machined portion and the unmachined portion away from one another while the spindle is stopped,
- wherein the controller includes,
- a load detector detecting a load of the spindle moving motor, and
- a workpiece separation detector detecting a defect in the cutting-off process based on the detected load during the taking out process.
A controller for controlling a machine tool, the machine tool including:
- a spindle holding one end side of a workpiece;
- an opposed chuck that-is-opposed to the spindle and is movable in a direction away from the spindle while holding another end side of the workpiece;
- and a spindle moving motor for moving the spindle,
- wherein the controller is configured to perform a cutting-off process of cutting the workpiece to separate a machined portion of the workpiece and an unmachined portion of the workpiece while holding the workpiece by the spindle and the opposed chuck, and to perform a taking out process of moving the machined portion and the unmachined portion away from one another while the spindle is stopped, and
- wherein the controller includes,
- a load detector detecting a load of the spindle moving motor, and
- a workpiece separation detector detecting a defect in the cutting-off process based on the d load during the taking out process.
A machine tool comprising:
- a spindle holding one end side of a workpiece;
- an opposed chuck opposed to the spindle and movable in a direction away from the spindle while holding another end side of the workpiece;
- a spindle moving motor for moving the spindle;
- and
- a controller configured to perform a cutting-off process of cutting the workpiece to separate a machined portion of the workpiece and an unmachined portion of the workpiece while holding the workpiece by the spindle and the opposed chuck, and to perform a taking out process of moving the machined portion and the unmachined portion away from one another while the spindle is stopped,
- wherein the controller is further configured to:
- detect a load of the spindle moving motor, and
- detect a defect in the cutting-off process based on the detected load during the taking out process.
Dependencies are inferred from the claim text.