초록 ▼

A grinding machine particularly suitable for use in grinding curved surfaces of a pre-machined work, the machine comprising a working table disposed horizontally for fixedly holding a work thereon and movable back and forth in a horizontal direction; a grinding head supported on a machine frame and

A grinding machine particularly suitable for use in grinding curved surfaces of a pre-machined work, the machine comprising a working table disposed horizontally for fixedly holding a work thereon and movable back and forth in a horizontal direction; a grinding head supported on a machine frame and movable vertically toward and away from the working table, the grinding head including an abrasive grinding tool and a tool-driving electric motor for rotatingly driving the grinding tool; and means for controlling the movement of the working table and grinding head in response to variations in the load current of the tool-driving motor in such a manner as to effect uniform and smooth grinding job on the surfaces of the work.

대표청구항 ▼

A curved surface grinding machine, comprising: a working table for fixedly holding a work thereon and movable back and forth in a longitudinal direction by means of a servomotor; a grinding head supported on a machine frame and movable perpendicularly toward and away from said working table by means

A curved surface grinding machine, comprising: a working table for fixedly holding a work thereon and movable back and forth in a longitudinal direction by means of a servomotor; a grinding head supported on a machine frame and movable perpendicularly toward and away from said working table by means of a servomotor, said grinding head including an abrasive grinding tool and a tool-driving electric motor for driving said grinding tool; and means for controlling the movement of said working table and grinding head in response to variations in the load current of said tool-driving motor in such a manner as to effect uniform grinding on and impart a high degree smoothness to the surface of said work; said controlling means including a detector adapted to detect the load current of said tool-driving motor, a comparator connected to said detector and adapted to produce an electric signal indicative of the difference between the load current detected by said detector and a predetermined reference value, and means for controlling said servomotors of said working table and grinding head on the basis of the signal from said comparator.