Disclosed are an antigravity shear-resisting and deformation-eliminating centerless grinding apparatus and a machining method. The grinding apparatus comprises a grinding tool configured to grind a thin-walled bearing ring and a clamping mechanism configured to clamp the thin-walled bearing ring stably. The clamping mechanism comprises a main clamping mechanism and an auxiliary clamping mechanism. The main clamping mechanism comprises an electromagnetic centerless clamp. The electromagnetic coil is arranged above the thin-walled bearing ring being ground. According to the present invention, not only can gravity of the thin-walled bearing ring and a tangential force generated by grinding be counteracted to effectively prevent extrusion deformation of the thin-walled bearing ring when being ground, but also the lubricating performance the capacity to resist load itself can be further improved and the service life of is prolonged.

Disclosed are an antigravity shear-resisting and deformation-eliminating centerless grinding apparatus and a machining method. The grinding apparatus comprises a grinding tool configured to grind a thin-walled bearing ring and a clamping mechanism configured to clamp the thin-walled bearing ring stably. The clamping mechanism comprises a main clamping mechanism and an auxiliary clamping mechanism. The main clamping mechanism comprises an electromagnetic centerless clamp. The electromagnetic coil is arranged above the thin-walled bearing ring being ground. According to the present invention, not only can gravity of the thin-walled bearing ring and a tangential force generated by grinding be counteracted to effectively prevent extrusion deformation of the thin-walled bearing ring when being ground, but also the lubricating performance the capacity to resist load itself can be further improved and the service life of is prolonged.

A loading device for a plunge-cut grinding machine for centerless external cylindrical grinding includes a receiving frame, a support body, and a displacement actuator. The receiving frame is open in a gravitational direction and is for receiving a blank workpiece to be machined. The support body forms a support base for the blank workpiece. The displacement actuator is for axially displacing the receiving frame relative to the support body and into a grinding gap of the plunge-cut grinding machine. The receiving frame includes a conveying stop on an axially facing end face. The conveying stop is for axially expelling a final workpiece arranged in the grinding gap.

A loading device for a plunge-cut grinding machine for centerless external cylindrical grinding includes a receiving frame, a support body, and a displacement actuator. The receiving frame is open in a gravitational direction and is for receiving a blank workpiece to be machined. The support body forms a support base for the blank workpiece. The displacement actuator is for axially displacing the receiving frame relative to the support body and into a grinding gap of the plunge-cut grinding machine. The receiving frame includes a conveying stop on an axially facing end face. The conveying stop is for axially expelling a final workpiece arranged in the grinding gap.

A center shaft machining apparatus includes: a grinding structure that moves on a machining central axis while rotating about the machining central axis and machines an end surface on one end side of a workpiece arranged on the machining central axis; an end portion support structure that supports an opposite end side of the workpiece; and a shaft portion support structure that supports a shaft support portion set at an intermediate portion of the workpiece. The end portion support structure includes an eccentric mechanism capable of supporting an opposite end of the workpiece in a state where a workpiece central axis of the workpiece is eccentric with respect to the machining central axis.

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.

The invention relates to a centerless cylindrical grinding machine (100) for throughfeed and plunge grinding of arbitrary workpieces comprising a first drivable positioning axis X.sub.S for a grinding headstock (10) with a grinding wheel (11) rotatable about an axis of rotation (12) and a second drivable positioning axis X.sub.R for a regulating wheel headstock (20) with a regulating wheel (21) rotatable about an axis of rotation (22), and a workpiece support (32) arrangeable substantially between the grinding headstock (10) and the regulating wheel headstock (20), wherein a further drivable positioning axis Y.sub.W, extending orthogonal to at least one of the positioning axes X.sub.S and X.sub.R, is mounted for a carriage (31) on a carriage track (30), via which the workpiece support (32) is movable, wherein the grinding headstock (10) and the regulating wheel headstock (20) are arranged in a first area (41) of a machine bed (40) and the carriage track (30) is at least partially arranged in a second area (42) of the machine bed (40), wherein the second area (42) of the machine bed (40) has a lesser extension in a direction parallel to the positioning axis Y.sub.W than the first area (41) of the machine bed (40).

The present invention discloses a device for removal of wheel rim burr which comprises a main body, plural positioning wheels, an eccentric wheel disposed on the main body, and at least two brush wheels disposed between two corresponding positioning wheels.

A workpiece supporting device (6) includes a base stand (10), a shoe (11) which is disposed on at least one place in a circumferential direction of a workpiece (1a) that is rotationally driven using a rotary drive device (4) and is in sliding contact with a circumferential surface of the workpiece (1a), and a supporting body (12) which supports the shoe (11) with respect to the base stand (10). The supporting body (12) includes a compliant structure portion (a leaf spring (14)) which tilts the shoe (11) in accordance with tilting of the workpiece (1a) with respect to the base stand (10).