Machining system, and method of manufacturing a machined product
AssigneeSumitomo Electric Sintered Alloy, Ltd.
InventorsMasaki Unten, Hiroaki Terai, Senichi Sumi
Life of this patent
Estimating the term…
Abstract
A machining system includes, a tool configured to machine a workpiece, a motor configured to rotate the tool or the workpiece, a controller configured to control the motor, a measurement device configured to acquire a load current of the motor, the controller is configured to change a rotational speed of the motor when a Mahalanobis distance exceeds a threshold, the Mahalanobis distance is a value determined by using a parameter based on the load current acquired by the measurement device in a specific machining range of the workpiece, and the parameter based on the load current includes a parameter obtained by performing Fourier transform on the load current and a measured value of the load current.
Claims8
A machining system comprising:
- a tool configured to machine a workpiece;
- a motor configured to rotate the tool or the workpiece;
- a controller configured to control the motor;
- and
- a measurement device configured to acquire a load current of the motor, wherein
- the controller is configured to change a rotational speed of the motor when a Mahalanobis distance exceeds a threshold,
- the Mahalanobis distance is a value determined by using a parameter based on the load current acquired by the measurement device in a specific machining range of the workpiece, and
- the parameter based on the load current includes a parameter obtained by performing Fourier transform on the load current and a measured value of the load current.
A method of manufacturing a machined product, comprising
- machining a workpiece with a tool while rotating the tool or the workpiece by a motor and measuring a load current of the motor by a measurement device, wherein
- a rotational speed of the motor is changed in machining when a Mahalanobis distance exceeds a threshold,
- the Mahalanobis distance is a value determined by using a parameter based on the load current acquired by the measurement device in a specific machining range of the workpiece, and
- the parameter based on the load current includes a parameter obtained by performing Fourier transform on the load current and a measured value of the load current.
Dependencies are inferred from the claim text.