A grinding machine includes a working grinder and a holding unit. The working grinder includes a grinding wheel mounting section and a power mechanism. A grinding wheel is mounted on the grinding wheel mounting section. The holding unit includes a base, a movable seat, a holding device, and a grinding wheel trimming module. The grinding wheel trimming module includes a transmission shaft box, a motor, a holding claw, and a clamping cylinder. The holding claw is used for holding a trimming grinding wheel. The holding unit further includes a pedestal, and a clamping arm. The clamping arm is provided with a holding end. Thus, the holding end grips and moves the trimming grinding wheel to the holding claw which is driven by the clamping cylinder to clamp the trimming grinding wheel. Then, the holding end releases the trimming grinding wheel.

A grinding machine includes a working grinder and a holding unit. The working grinder includes a grinding wheel mounting section and a power mechanism. A grinding wheel is mounted on the grinding wheel mounting section. The holding unit includes a base, a movable seat, a holding device, and a grinding wheel trimming module. The grinding wheel trimming module includes a transmission shaft box, a motor, a holding claw, and a clamping cylinder. The holding claw is used for holding a trimming grinding wheel. The holding unit further includes a pedestal, and a clamping arm. The clamping arm is provided with a holding end. Thus, the holding end grips and moves the trimming grinding wheel to the holding claw which is driven by the clamping cylinder to clamp the trimming grinding wheel. Then, the holding end releases the trimming grinding wheel.

A dressing device for profiling and sharpening a grinding tool includes a rotatable sharpening tool and a rotatable profiling tool axially offset from and settable relative to the rotatable sharpening tool. In one embodiment, the rotatable sharpening tool and the rotatable profiling tool have a common rotational axis, and the tools are settable along the common rotational axis. In another embodiment, a profiling tool axis of rotation is parallel to a sharpening tool axis of rotation. A method for dressing a grinding tool is also disclosed. The method includes profiling and sharpening the grinding tool with a single dressing device having a rotatable profiling tool with a first feed rate and a first advancement rate, and a rotatable sharpening tool with a second feed rate and a second advancement rate. The two feed rates or the two advancement rates are different.

A dressing device for profiling and sharpening a grinding tool includes a rotatable sharpening tool and a rotatable profiling tool axially offset from and settable relative to the rotatable sharpening tool. In one embodiment, the rotatable sharpening tool and the rotatable profiling tool have a common rotational axis, and the tools are settable along the common rotational axis. In another embodiment, a profiling tool axis of rotation is parallel to a sharpening tool axis of rotation. A method for dressing a grinding tool is also disclosed. The method includes profiling and sharpening the grinding tool with a single dressing device having a rotatable profiling tool with a first feed rate and a first advancement rate, and a rotatable sharpening tool with a second feed rate and a second advancement rate. The two feed rates or the two advancement rates are different.

The invention relates to a method for machining toothings, which method uses a disk-shaped, toothed tool that is rotationally driven about its axis of rotation and has a geometrically defined cutting edge. The tool teeth are produced from a base material, are provided, at least on the tooth flanks, with a coating that improves wear resistance, and have machining surfaces facing an end face of the tool, said machining surfaces being re-ground from time to time when the tool is reconditioned, wherein after at least one regrinding, use of the tool is resumed and continued with regions of the machining surfaces formed along the cutting edges from the base material.

A grinding apparatus according to an embodiment comprises: a table to hold a substrate; a grinding stone driver to be rotatable while holding a grinding stone; and a location adjuster to adjust a relative location between the grinding stone driver and the table. The grinding stone has steps including a first grinding face and a second grinding face, and a first distance between a rotation center of the grinding stone driver and the first grinding face is different from a second distance between the rotation center and the second grinding face. The location adjuster adjusts the relative location from a first state in which the first grinding face is in contact with an end face of the substrate to a second state in which the second grinding face is in contact with the end face.

A grinding apparatus according to an embodiment comprises: a table to hold a substrate; a grinding stone driver to be rotatable while holding a grinding stone; and a location adjuster to adjust a relative location between the grinding stone driver and the table. The grinding stone has steps including a first grinding face and a second grinding face, and a first distance between a rotation center of the grinding stone driver and the first grinding face is different from a second distance between the rotation center and the second grinding face. The location adjuster adjusts the relative location from a first state in which the first grinding face is in contact with an end face of the substrate to a second state in which the second grinding face is in contact with the end face.

A method for dressing a grinding worm using a dressing roll that engages the grinding worm to profile its helical grinding profile. The dressing roll is produced by: a) producing a disk-shaped base body a profiled surface for receiving a layer of abrasive particles, wherein the surface is at least partially tooth-shaped in a radial cross section, b) positioning the abrasive particles on the profiled surface, c) profiling the base body provided with abrasive particles by removing outer sections of the abrasive particles with a profiling tool so that the abrasive profile of the dressing roll is created. Production of the profiled surface takes place in step a) so that the distance between the profiled surface and the abrasive profile changes during advancing from the root region to the tip region at a flank of the tooth-shaped surface, measured in the radial cross section perpendicular to the profiled surface.

A method for dressing a grinding worm using a dressing roll that engages the grinding worm to profile its helical grinding profile. The dressing roll is produced by: a) producing a disk-shaped base body a profiled surface for receiving a layer of abrasive particles, wherein the surface is at least partially tooth-shaped in a radial cross section, b) positioning the abrasive particles on the profiled surface, c) profiling the base body provided with abrasive particles by removing outer sections of the abrasive particles with a profiling tool so that the abrasive profile of the dressing roll is created. Production of the profiled surface takes place in step a) so that the distance between the profiled surface and the abrasive profile changes during advancing from the root region to the tip region at a flank of the tooth-shaped surface, measured in the radial cross section perpendicular to the profiled surface.

A method for dressing a grinding worm using a dressing roll that engages the grinding worm to profile its helical grinding profile. The abrasive profile of the dressing roll is at least partially tooth-shaped in a radial cross section and extends radially from a root region to a tip region. The dressing roll is produced by: a) producing a counterpart having an inner surface; b) positioning and fixing a layer of abrasive particles on the tooth-shaped surface; c) producing a disk-shaped base body of the dressing roll and connecting the base body with a carrier layer for the abrasive particles; d) demolding the base body; e) profiling the base body. Step a) includes providing the counterpart with the surface so that the distance between the profiled surface and the abrasive profile changes during advancing from the root region to the tip region at least at one flank of the surface, measured in the radial cross section perpendicular to the profiled surface.