US 4,897,967 AGranted

Apparatus for truing a grinding wheel

AssigneeToyoda Koki Kabushiki Kaisha

InventorsToshio Maruyama, Yukio Oda, Syoji Yamaguchi

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Abstract

An apparatus for truing the cylindrical outer peripheral grinding surface of a grinding wheel includes a truing head which is movable toward or away from the grinding wheel in a first direction which is parallel to the grinding surface and in a second direction which is perpendicular to the first direction. A truing wheel is rotatably supported on the truing head, has a truing surface and is movable with the truing head for truing the grinding surface. A contacting detection member is secured to the truing head, projects therefrom toward the grinding surface and has an end surface which can be brought into contact with the grinding surface. A device is provided for detecting the contact of the end surface of the detection member with the grinding surface and producing an output signal upon detecting their contact. Three feed control devices are provided to move the truing head in various directions. Detecting devices and memories are provided for detecting the position of the truing head and for controlling movement of the head.

An apparatus for truing a rotatably supported grinding wheel having a grinding surface at its outer circumferential portion thereof, comprising:

a truing head movable relative to said grinding wheel in a first direction parallel to said grinding surface of said grinding wheel and in a second direction perpendicular to said first direction;
a truing tool supported on said truing head;
a contact detection member secured to said truing head and engageable with said grinding surface of said grinding wheel;
a contact detection device for generating a contact signal when said contact detection member is brought into contact with said grinding surface of said grinding wheel through relative movement between said truing head and said grinding wheel in said second direction;
gap memory means for storing a gap between edges close to said grinding wheel of said truing tool and said contact detection member in said second direction;
first and second feed means for effecting relative movement between said truing head and said grinding wheel in said first and second directions, respectively;
and
a feed control device for controlling, in response to said contact signal from said contact detection device and based on said gap stored in said gap memory means, said first and second feed means in accordance with a predetermined cycle so as to true said grinding wheel, said feed control device including:
first feed control means operable when said edge of said truing tool is in alignment with said grinding surface of said grinding wheel upon completion of a previous truing operation, for moving said truing head relative to said grinding wheel in said second direction until said contact signal is generated;
gap detection means for detecting a distance through which said truing head is moved relative to said grinding wheel under the control of said first feed control means;
and
data setting means for storing said distance detected by said gap detection means in said gap memory means so as to renew said gap stored therein for use in positioning said truing tool relative to said grinding wheel in a subsequent truing operation.

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Abstract

Claims5