Jtekt Corporation

Yoshitaro Osaki

Toshihiro Yonezu

Hiroaki Sugiura

Makoto Nonoyama

Satoshi Ito

A grinding machine includes: a workhead () that rotatably supports a solid cylindrical or hollow cylindrical workpiece (W); a grinding wheel () that moves relative to the workhead () in a direction that intersects with a rotation axis of the workhead () to grind an outer peripheral surface of the workpiece (W); a measuring apparatus () that measures a position of an outer peripheral surface of the workpiece (W) corresponding to a rotation angle of the workhead (); an outer peripheral surface shape calculation unit () that calculates an outer peripheral surface shape of the workpiece (W) on the basis of the position of the outer peripheral surface of the workpiece (W) measured by the measuring apparatus () during grinding; and a grinding condition determination unit () that determines a condition of grinding, which is performed after measurement by the measuring apparatus (), on the basis of the calculated outer peripheral surface shape of the workpiece (W).

Grinding machine and grinding method

An apparatus and method for grinding a workpiece by rotating the workpiece about a rotational axis, rotating a cylindrical grinding wheel about a rotational axis being parallel to the rotational axis of the workpiece, moving the grinding wheel relative to the workpiece at least in one of a first direction being perpendicular to the rotational axis of the workpiece for grinding the workpiece at a cylindrical surface of the grinding wheel and a second direction being parallel to the rotational axis of the workpiece for grinding the workpiece at an end surface of the grinding wheel being perpendicular to the rotational axis of the grinding wheel, and by superimposing a vibration signal including a plurality of frequency components to a driving signal outputted to one of a workpiece rotating means for rotating the workpiece and a grinding wheel rotating means for rotating the grinding wheel.

Apparatus and method for grinding workpiece

A machining apparatus, in which a plurality of user set programs in relation to one axis is written and the amount of the infeed motion of the grinding wheel is increased to restrain the change of the load of the grinding wheel, improves a machining accuracy and achieve a longer life of the grinding wheel. When the grinding wheelcut arc portionsA,C, U having its diameter of which is gradually small according to a position apart from the shoulder, the numerical controllercontrols a rotation of the workpiecearound said C-axis, a motion of a grinding wheelrelative to the workpiecealong an X-axis and Z-axis to trace an arc profile of the arc portionA,C, U of the extending portion, and an infeed motion of the grinding wheelto the workpiecealong the X-axis to increase gradually an amount of the infeed motion of the grinding wheelto the workpiecealong the X-axis in order to grind the extending portion to the arc profile and in order to increase gradually a grinding load of the grinding wheel

Growing community of inventors

Nukata-gun, Japan

Yoshitaro Osaki