Dressing device and method for dressing a grinding tool

Abstract

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.

Claims

1.-10. (canceled)

11. A dressing device for profiling and sharpening a grinding tool, comprising: a rotatable sharpening tool; and a rotatable profiling tool axially offset from and settable relative to the rotatable sharpening tool.

12. The dressing device of claim 11, wherein: the rotatable sharpening tool and the rotatable profiling tool have a common rotational axis; and the rotatable profiling tool is settable relative to the rotatable sharpening tool along the common rotational axis.

13. The dressing device of claim 12, wherein the rotatable sharpening tool is decoupled from the rotatable profiling tool with regards to rotation.

14. The dressing device of claim 11, wherein: the rotatable sharpening tool comprises a sharpening tool axis of rotation; and the rotatable profiling tool comprises a profiling tool axis of rotation, parallel to the sharpening tool axis of rotation.

15. The dressing device of claim 14, wherein the sharpening tool axis of rotation and the profiling tool axis of rotation can be set relative to one another.

16. The dressing device of claim 14, further comprising the grinding tool comprising a grinding tool axis of rotation, wherein the sharpening tool axis of rotation, the profiling tool axis of rotation, and the grinding tool axis of rotation lie on a common plane.

17. The dressing device of claim 14, further comprising the grinding tool comprising a grinding tool axis of rotation, wherein: the profiling tool axis of rotation lies in a first plane with the grinding tool axis of rotation; the sharpening tool axis of rotation lies in a second plane with the grinding tool axis of rotation; and the first plane and the second plane enclose an acute angle.

18. The dressing device of claim 11, wherein: the rotatable sharpening tool comprises a cutting material; and the cutting material is conundrum.

19. A method for dressing a grinding tool, comprising profiling and sharpening the grinding tool with a single dressing device, the single dressing device comprising: 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, wherein: the first feed rate is different than the second feed rate; or the first advancement rate is different than the second advancement rate.

20. The method of claim 19, wherein the rotatable profiling tool and the rotatable sharpening tool simultaneously machine the grinding tool.

21. The method of claim 20, wherein the grinding tool is a grinding wheel comprising cubic boron nitride.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Below, three exemplary embodiments of the disclosure are explained in more detail by means of a drawing. In the figures:

[0015] FIG. 1 shows components of a dressing device as well as a grinding tool to be processed in plan view,

[0016] FIG. 2 shows the arrangement according to FIG. 1 in a perspective view,

[0017] FIGS. 3 and 4 show a second exemplary embodiment of a dressing device in views analogous to FIGS. 1 and 2,

[0018] FIGS. 5 and 6 show a third exemplary embodiment of a dressing device in views analogous to FIGS. 1 and 2.

DETAILED DESCRIPTION

[0019] Unless otherwise stated, the following explanations relate to all exemplary embodiments. Parts that correspond to each other or have basically the same effect are marked with the same reference symbol in all figures. The same applies to the identification of geometric structures.

[0020] In the figures, a grinding tool 3 is shown, which is made of cubic boron nitride (CBN) with a ceramic bond. To dress the grinding tool 3, a dressing device 1 is used, of which only two tools 4, 5 are shown, namely a profiling tool 4 and a sharpening tool 5. The profiling tool 4 is rotatable about an axis of rotation RP; the sharpening tool 5 is rotatable about an axis of rotation RSc. The axis of rotation of the grinding tool 3 is denoted by RA. All axes of rotation RA, RP, RSc are aligned parallel to one another in all exemplary embodiments and in all operating states.

[0021] In the exemplary embodiment according to FIGS. 1 and 2, the axes of rotation RP, RSc coincide geometrically. The two tools 4, 5 are moved here independently of one another. Each tool 4, 5 of the dressing device 1 has its own electric drive. The tools 4, 5 are displaceable independently of one another along the common axis of rotation RP, RSc. The distance between the axis of rotation RP, RSc of the tools 4, 5 and the axis of rotation RA of the grinding tool 3 can be set.

[0022] In the embodiment according to FIGS. 1 and 2, one of the tools 4, 5 may be used for machining the grinding tool 3, while the other tool 5, 4 remains in a waiting position.

[0023] In the exemplary embodiment according to FIGS. 3 and 4, no adjustment of the axial distance is provided between the tools 4, 5 of the dressing device 1. In contrast, the axes of rotation RP, RSc are displacable parallel to one another. In the configuration according to FIGS. 3 and 4, the axes of rotation RP, RSc coincide. Based on this configuration, it is possible to move only one of the two tools 4, 5 onto the grinding tool 3 in the radial direction of the axis of rotation RA. If the relevant tool 4, 5 is then moved in the longitudinal direction of the rotational axes RP, RSc, the other tool 5, 4 also performs this movement in the axial direction, and can remain out of engagement with the grinding tool 3. In a modified execution of the method, it is also possible to use the dressing device 1 according to FIGS. 3 and 4 to bring the tools 4, 5 into engagement with the grinding tool 3 simultaneously, i.e., to profile and sharpen the grinding tool 3 in a single pass by means of the synchronously operated tools 4, 5.

[0024] FIGS. 5 and 6 show an exemplary embodiment in which the tools 4, 5 are rotatable about spaced apart axes of rotation RP, RSc and are movable independently of one another along these axes of rotation RP, RSc. Each axis of rotation RP, RSc of the dressing device 1 can be set with respect to the axis of rotation RA of the grinding tool 3.

[0025] In the design according to FIGS. 5 and 6, a first plane is defined by the axes of rotation RA, RP. A second plane is defined by the axes of rotation RA, RSc. An acute angle is formed between these planes, which intersect in the axis of rotation RA, which in the exemplary embodiment is less than 30 degrees.

[0026] In all designs, the control and synchronization of the tools 4, 5 to be carried out is accomplished via the machine control of the dressing device 1. The sharpening tool 5 contains corundum as a cutting material and can also be used to clean the grinding tool 3.

REFERENCE NUMERALS

[0027] 1 Dressing device

[0028] 3 Grinding tool

[0029] 4 Profiling tool

[0030] 5 Sharpening tool

[0031] RA Axis of rotation of the grinding tool

[0032] RP Axis of rotation of the profiling tool

[0033] RSc Axis of rotation of the sharpening tool