Dmg Mori Company Limited

Kengo Kawai

Shizuo Nishikawa

Katsuhiko Ono

Masataka Sakamoto

Morihiro Hideta

Koji Iiyama

Masanori Murozumi

Yasuhiko Morita

Ryo Murakami

A machine tool includes: a display; a tool configured to machine a workpiece; a spindle configured to rotate the tool or the workpiece; a sensor configured to detect a vibration frequency of the spindle or the tool; and a processor configured to control the machine tool. The processor is configured to: detect a chatter vibration in the spindle or the tool based on the vibration frequency; based on a frequency of the chatter vibration, a rotation speed of the spindle, and the number of cutting edges of the tool, calculate an order corresponding to the number of vibrations of the tool during a period of time until a current rotation angle of a first cutting edge of the tool reaches a current rotation angle of a second cutting edge of the tool; and present order information on the display, the order information indicating a magnitude of the calculated order.

Machine tool, method for controlling machine tool, and computer-readable storage medium storing program for controlling machine tool

A machining condition determining apparatus () includes a first setter () setting a cutting speed of a cutting tool, a storage () storing a maximum output value of a drive motor rotating a spindle holding the cutting tool and a number of revolutions of the drive motor corresponding to the maximum output value, a number-of-revolutions determiner () obtaining a steady-state value of the maximum output value of the drive motor stored in the storage () and determining a number of revolutions of the drive motor corresponding to the obtained steady-state value of the maximum output value, and a tool-diameter determiner () calculating a tool diameter of the cutting tool based on the cutting speed set by the first setter () and the number of revolutions of the drive motor determined by the number-of-revolutions determiner ().

Machining condition-determining device and cutting tool selection apparatus

A machining management apparatus includes a tool information storage storing therein information relating to each cutting tool used in a machine tool and storing therein a coefficient n and a coefficient C in a tool life equation corresponding to tool life influencing factors including at least a workpiece and a cutting tool material, and an adapted cutting speed calculator executing a machining condition receiving processing of receiving information on the tool life influencing factors and information on a desired cutting speed, a coefficient recognition processing of recognizing the coefficient n and the coefficient C corresponding to the tool life influencing factors by referring to the tool information storage based on the received tool life influencing factor information, and a cutting speed calculation processing of calculating a cutting speed adapted to the desired cutting time according to the tool life equation based on the recognized coefficient n and coefficient C.

Machining management apparatus

A machining status display apparatus includes a display device having a display screen, a stability lobe picture creator creating, based on specifications of a tool to be used, display picture data for displaying a stability lobe as a correlation diagram between a spindle rotation speed and a limit depth of cut of the tool above which regenerative chatter occurs, a first machining information picture creator creating display picture data for displaying machining related information other than regenerative chatter corresponding to set machining conditions, and a display controller displaying the stability lobe and the machining related information with the stability lobe and the machining related information superimposed one on another on the display screen of the display device based on the display picture data created by the stability lobe picture creator and the display picture data created by the first machining information picture creator.

Growing community of inventors

Nara, Japan

Kengo Kawai