A system for tracking workpiece movement during grinding of the workpiece includes a track, a motorized carriage movably mounted on the track, a detector, and a controller. A position of the carriage is determined by an encoder of the track. The detector is mounted on the carriage and includes a detection window and a sensor. The sensor detects a workpiece edge during grinding by detecting an image of the workpiece edge in the detection window. The controller determines a grinding position of the workpiece based on position data received from the carriage and edge data received from the detector. The controller controls the carriage to move in a forward direction or in a reverse direction to maintain the position of the image of the workpiece edge in the detection window.

A system for tracking workpiece movement during grinding of the workpiece includes a track, a motorized carriage movably mounted on the track, a detector, and a controller. A position of the carriage is determined by an encoder of the track. The detector is mounted on the carriage and includes a detection window and a sensor. The sensor detects a workpiece edge during grinding by detecting an image of the workpiece edge in the detection window. The controller determines a grinding position of the workpiece based on position data received from the carriage and edge data received from the detector. The controller controls the carriage to move in a forward direction or in a reverse direction to maintain the position of the image of the workpiece edge in the detection window.

When a work W rotates counterclockwise about an axis O.sub.w and is subjected to infeed grinding by a regulating wheel (1) which rotates clockwise about an axis O.sub.1 and a grinding wheel (2) which rotates clockwise about an axis O.sub.2, a load F acting on a blade (4), a load acting on the work W supported by the blade (4), and a load operating position y in the blade (4) at any given time are measured by a controller (20) based on the outputs of a first stress sensor S.sub.1 and a second stress sensor S.sub.2 and according to the correlation information stored in a storage device. If the component of a specified frequency extracted by performing frequency analysis of the time series of the load exceeds a threshold value, then designation processing is carried out to reduce the component of the designated frequency to the threshold value or less.

When a work W rotates counterclockwise about an axis O.sub.w and is subjected to infeed grinding by a regulating wheel (1) which rotates clockwise about an axis O.sub.1 and a grinding wheel (2) which rotates clockwise about an axis O.sub.2, a load F acting on a blade (4), a load acting on the work W supported by the blade (4), and a load operating position y in the blade (4) at any given time are measured by a controller (20) based on the outputs of a first stress sensor S.sub.1 and a second stress sensor S.sub.2 and according to the correlation information stored in a storage device. If the component of a specified frequency extracted by performing frequency analysis of the time series of the load exceeds a threshold value, then designation processing is carried out to reduce the component of the designated frequency to the threshold value or less.

When a work W rotates counterclockwise about an axis O.sub.w and is subjected to infeed grinding by a regulating wheel (1) which rotates clockwise about an axis O.sub.1 and a grinding wheel (2) which rotates clockwise about an axis O.sub.2, a load F acting on a blade (4), a load acting on the work W supported by the blade (4), and a load operating position y in the blade (4) at any given time are measured by a controller (20) based on the outputs of a first stress sensor S.sub.1 and a second stress sensor S.sub.2 and according to the correlation information stored in a storage device. If the component of a specified frequency extracted by performing frequency analysis of the time series of the load exceeds a threshold value, then designation processing is carried out to reduce the component of the designated frequency to the threshold value or less.

A method and device for simultaneous centerless cylindrical grinding of multiple workpieces (11, 12, 13, 14), at least sections of which are rotationally symmetrical, the workpieces are arranged on a support apparatus (200) one behind the other between at least one grinding wheel (110) and at least one regulating wheel (120), and wherein the axis of rotation of the regulating wheel is inclined with respect to a horizontal plane extending parallel to the workpiece axes of rotation and the grinding wheel axis of rotation by an inclination angle (). During grinding the workpieces are arranged with a height offset relative to each other corresponding to at least a quarter of the inclination angle () of the axis of rotation of the regulating wheel with respect to the parallel plane to render the respective bearing angles () of the workpieces on the inclined regulating wheel consistent.

A method and device for simultaneous centerless cylindrical grinding of multiple workpieces (11, 12, 13, 14), at least sections of which are rotationally symmetrical, the workpieces are arranged on a support apparatus (200) one behind the other between at least one grinding wheel (110) and at least one regulating wheel (120), and wherein the axis of rotation of the regulating wheel is inclined with respect to a horizontal plane extending parallel to the workpiece axes of rotation and the grinding wheel axis of rotation by an inclination angle (). During grinding the workpieces are arranged with a height offset relative to each other corresponding to at least a quarter of the inclination angle () of the axis of rotation of the regulating wheel with respect to the parallel plane to render the respective bearing angles () of the workpieces on the inclined regulating wheel consistent.

Grinding is performed on an outer peripheral surface of a shaft member while rotationally driving the shaft member under a state in which both end surfaces of the shaft member are sandwiched between a pair of support portions. A convex surface is formed on one axial end surface of the shaft member or an end surface of one of the pair of support portions, and a flat surface is formed on the other of the one axial end surface of the shaft member and the end surface of the one of the pair of support portions. The flat surface and an apex of the convex surface are brought into contact with each other to support one axial end portion of the shaft member.

The invention provides a method for the centerless grinding of shaft parts (9), in particular of tubes for assembled camshafts, in the case of which the shaft part (9) which is to be ground, and has axial centering portions (11) on its end sides, is ground in rotatably driven fashion, in a manner which is customary in centerless grinding, in a gap between the grinding wheel (1) and regulating wheel (2). The grinding wheel (1) and regulating wheel (2) have a width which corresponds at least to the length of the shaft part (9). The shaft part (9) is ground in its end regions (28) first of all concentrically in relation to the centering portions (11), and this produces ground formations concentrically in relation to the centering portions (11). This is followed by the grinding of the intermediate region (29), which is located between the end regions (28), and then by the entire shaft part (9) being ground to size in a dimensionally accurate and dimensionally stable manner on the basis of the ground formations at the end regions (28) of the shaft part (9), said formations being made concentrically in relation to the centring portions (11) and resting on a support (16). In order to implement the method, the invention provides an appropriately dimensioned grinding-wheel and regulating-wheel pair (1, 2) in a centreless grinding machine, in the case of which regions of increased diameter, i.e. a respective profiling, are/is provided in the side regions of said machine in order to grind the end regions (28) of the shaft part (9).

The invention provides a method for the centerless grinding of shaft parts (9), in particular of tubes for assembled camshafts, in the case of which the shaft part (9) which is to be ground, and has axial centering portions (11) on its end sides, is ground in rotatably driven fashion, in a manner which is customary in centerless grinding, in a gap between the grinding wheel (1) and regulating wheel (2). The grinding wheel (1) and regulating wheel (2) have a width which corresponds at least to the length of the shaft part (9). The shaft part (9) is ground in its end regions (28) first of all concentrically in relation to the centering portions (11), and this produces ground formations concentrically in relation to the centering portions (11). This is followed by the grinding of the intermediate region (29), which is located between the end regions (28), and then by the entire shaft part (9) being ground to size in a dimensionally accurate and dimensionally stable manner on the basis of the ground formations at the end regions (28) of the shaft part (9), said formations being made concentrically in relation to the centring portions (11) and resting on a support (16). In order to implement the method, the invention provides an appropriately dimensioned grinding-wheel and regulating-wheel pair (1, 2) in a centreless grinding machine, in the case of which regions of increased diameter, i.e. a respective profiling, are/is provided in the side regions of said machine in order to grind the end regions (28) of the shaft part (9).