Mitsubishi Electric Corporation

Nagoya University

Kazuki Takahei

Toshihiro Azuma

Norikazu Suzuki

Ryosuke Ikeda

Shoya Ohno

Hiroki Uemura

A numerical control system according to the present invention controls machine drive systems included in a machine tool that performs machining using a tool, according to a numerical control program, and includes a coordinate transformation unit that acquires a disturbance force or a disturbance torque applied to each machine drive system, and coordinate-transforms the disturbance force or the disturbance torque into a tool reference coordinate system for output, and an identification unit that calculates cutting process parameters that determine characteristics of a cutting process model and dynamic characteristic parameters that determine characteristics of a dynamics model of the machine tool, using the disturbance force or the disturbance torque output from the coordinate transformation unit, states of the machine drive systems, predetermined equation models, and cutting conditions. The equation models define relationships between the cutting process parameters, the dynamic characteristic parameters, and the disturbance force or the disturbance torque.

Numerical control system and motor drive controller

The numerical control system includes: detecting circuitry to obtain cutting force generated in a machine tool; controlling circuitry to calculate a control amount according to a cutting condition and to control a feed drive mechanism of the machine tool; countermeasure determining circuitry to, when it is detected from the cutting force or a state of the feed drive mechanism of the machine tool that a machining defect has occurred, calculate a plurality of deviation degrees for possible causes of the machining defect, and compare the calculated deviation degrees and to thereby determine a cause of the machining defect whose occurrence has been detected; and correction-amount calculating circuitry to calculate, according to the cause of the machining defect determined by the countermeasure determining circuitry, a correction amount with respect to the control amount, and then output the correction amount to the controlling circuitry.

Numerical control system

A motor control apparatus that controls a motor equipped with a cooling apparatus includes: an acquisition unit to acquire the temperature of the motor; a drive control unit to drive the motor and output a driving state and an operating condition of the motor as an operation information signal; and a cause determination unit to determine, on the basis of the temperature of the motor and the operation information signal, at least one of a plurality of causes of heat generation as a cause of heat generation by the motor.

Growing community of inventors

Tokyo, Japan

Kazuki Takahei