Mounting system for a grinding machine

Abstract

A mounting system includes a magnet core arranged for positioning inside a magnet coil. The magnet core includes a cylindrical, elongate receiving region with a central axis, a rapid-mounting mandrel arranged for insertion into the cylindrical, elongate receiving region, and a discoid workpiece driver, detachably fastened to the rapid-mounting mandrel and extending normal to the central axis. A one of the magnet core or the rapid-mounting mandrel includes a rapid-mounting device for mounting the rapid-mounting mandrel in the magnet core. Example embodiments may includes the rapid-mounting device integrated into the magnet core or integrated into the rapid-mounting mandrel.

Claims

1.-10. (canceled)

11. A mounting system comprising a magnet core arranged for positioning inside a magnet coil, the magnet core comprising: a cylindrical, elongate receiving region comprising a central axis; a rapid-mounting mandrel arranged for insertion into the cylindrical, elongate receiving region; and a discoid workpiece driver, detachably fastened to the rapid-mounting mandrel and extending normal to the central axis, wherein a one of the magnet core or the rapid-mounting mandrel comprises a rapid-mounting device for mounting the rapid-mounting mandrel in the magnet core.

12. The mounting system of claim 11, wherein the rapid-mounting device is integrated into the magnet core.

13. The mounting system of claim 12, wherein the rapid-mounting device is formed as a hydraulic mounting device.

14. The mounting system of claim 13 further comprising an adjusting screw for actuating the rapid-mounting device, wherein: the discoid workpiece driver comprises an opening; and the adjusting screw can be actuated through the opening.

15. The mounting system of claim 14, wherein the rapid-mounting device has a first expansion region and a second expansion region, spaced apart from the first expansion region in an axial direction of the rapid-mounting mandrel.

16. The mounting system of claim 15, wherein an axial distance between a first center of the first expansion region and a second center of the second expansion region is greater than a diameter of the cylindrical, elongate receiving region.

17. The mounting system of claim 11, wherein the rapid-mounting device is integrated in the rapid-mounting mandrel.

18. The mounting system of claim 17, wherein the rapid-mounting device is formed as a hydraulic mounting device.

19. The mounting system of claim 18 further comprising an adjusting screw for actuating the rapid-mounting device, wherein: the discoid workpiece driver comprises an opening; and the adjusting screw can be actuated through the opening.

20. The mounting system of claim 18, wherein the rapid-mounting device has a first expansion region and a second expansion region, spaced apart from the first expansion region in an axial direction of the rapid-mounting mandrel.

21. The mounting system of claim 20, wherein an axial distance between a first center of the first expansion region and a second center of the second expansion region is greater than a diameter of the cylindrical, elongate receiving region.

22. The mounting system of claim 17, wherein the rapid-mounting device is formed as a mechanical mounting device.

23. The mounting system of claim 22 further comprising an adjusting screw for actuating the rapid-mounting device, wherein: the discoid workpiece driver comprises an opening; and the adjusting screw can be actuated through the opening.

24. The mounting system of claim 22, wherein the rapid-mounting device has a first expansion region and a second expansion region, spaced apart from the first expansion region in an axial direction of the rapid-mounting mandrel.

25. The mounting system of claim 24, wherein an axial distance between a first center of the first expansion region and a second center of the second expansion region is greater than a diameter of the cylindrical, elongate receiving region.

26. A method for handling the mounting system of claim 11 comprising: fixing the discoid workpiece driver to the rapid-mounting mandrel to form an assembly; surface grinding the assembly while separated from the magnet core; inserting the rapid-mounting mandrel into the cylindrical, elongate receiving region; mounting the rapid-mounting mandrel in the magnet core in a non-magnetic manner; and magnetically mounting a workpiece on the discoid workpiece driver without further processing.

27. The method of claim 26, further comprising: connecting the magnet core to a workpiece spindle; and grinding the cylindrical, elongate receiving region to a finished size before the rapid-mounting mandrel is inserted.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In the following, several exemplary embodiments are explained in more detail by means of a drawing. In the figures:

[0018] FIG. 1 shows a roughly schematic representation of a mounting system,

[0019] FIG. 2 shows a hydraulic rapid-mounting mandrel,

[0020] FIG. 3 shows a mechanical rapid-mounting mandrel,

[0021] FIG. 4 shows a mounting system having a magnet core, which is also designed as a hydraulic chuck,

[0022] FIG. 5 shows a mounting system having a magnet core fastened to a grinding spindle and an assembly which is hydraulically mounted therein and formed from a rapid-mounting mandrel and a workpiece driver in a more detailed illustration compared to FIG. 1, and

[0023] FIG. 6 shows the workpiece driver of the arrangement according to FIG. 5.

DETAILED DESCRIPTION

[0024] 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 symbols in all figures.

[0025] A mounting system indicated overall by the reference sign 1 is suitable for use in a grinding machine, namely a plunge grinding machine. Workpieces to be ground are to be mounted magnetically. In the present case, a workpiece spindle 2 is part of the grinding machine, which is not shown further.

[0026] A magnet core 4, which is surrounded by a magnet coil 3, is attached to the workpiece spindle 2. The magnet core 4 has a cylindrical, elongate receiving region 5, which is also referred to as a receiving bore. A rapid-mounting mandrel 7 can be fixed in the receiving region 5, which is connected to a workpiece driver 6 during operation of the grinding machine and represents a rotating assembly. The central axis of this assembly 6, 7 is identical to the axis of rotation of the grinding spindle 2 and is denoted by M (ref. FIG. 5). A single fixing screw 8 (FIG. 1) or a plurality of such fixing screws 8 (FIG. 5) establish the fixed connection between the workpiece driver 6 and the rapid-mounting mandrel 7. The workpiece driver 6 has the basic shape of a disk, which lies in a plane normal to the central axis M.

[0027] When preparing the assembly 6, 7 for use in the grinding machine, which includes the workpiece spindle 2, the workpiece driver 6 is first screwed onto the rapid-mounting mandrel 7. The assembly 6, 7 is then processed by means of a further grinding device, not shown. The separate grinding device has a mounting mechanism, which is comparable with the receiving region 5 in terms of its dimensions. While the rapid-mounting mandrel 7 is fixed in the mounting mechanism of the separate grinding device, a workpiece stop surface, labeled 9, of the workpiece driver 6 is surface-ground to the finished size. A further grinding of this workpiece stop surface 9 in a later process stage is generally no longer necessary. Exceptions can be made, for example, if the tension of the fixing screws 8 is changed in the meantime. In modified embodiments (not shown), in which the fixing screws 8 are omitted, the workpiece driver 6 can be formed in one piece with the rapid-mounting mandrel 7. Alternatively, the first surface grinding of the workpiece driver 6 can take place in the installed state in the machine.

[0028] After the workpiece stop surface 9 has been ground to the finished size, the assembly 6, 7 is preconditioned. In this state, the assembly 6, 7 on the workpiece spindle 2 can be exchanged rapidly. The rapid-mounting mandrel 7 is mounted in the magnet core 4 using a rapid-mounting device 10, which is integrated either in the rapid-mounting mandrel 7 or in the magnet core 4 (FIG. 4).

[0029] In the embodiment according to FIG. 2, the rapid-mounting device 10 is designed as a hydraulic mounting device of the rapid-mounting mandrel 7. In the longitudinal section according to FIG. 2, the rapid-mounting mandrel 7 describes a T-shape having a cylindrical section 23 and a flange 24 closing the same. On the end face of the flange 24, there is a cylindrical driver receptacle 20 and a driver stop surface 19 surrounding it in an annular manner.

[0030] Within the cylindrical section 23 of the rapid-mounting mandrel 7 according to FIG. 2, there is a central fluid chamber 13 which extends over the largest part of the length of the cylindrical section 23. A plurality of fluid channels 11 extend from the central fluid chamber 13 and end in outer fluid chambers 14. The outer fluid chambers 14 are immediately radially surrounded by expansion regions 15, 22, which are located near the end of the cylindrical section 23 to be inserted into the receiving region 5 or near the flange 24.

[0031] The pressure within the central fluid chamber 13 and the outer fluid chambers 14 connected thereto can be adjusted using an adjusting screw 16 which acts on a piston 17. In addition, an actuating tool 18 for actuating the adjusting screw 16 is indicated in FIG. 2. The actuating tool 18 can be attached to the end face of the flange 24 through an opening in the workpiece driver 6, not shown in FIG. 2.

[0032] The rapid-mounting mandrel 7 according to FIG. 3, like the rapid-mounting mandrel 7 according to FIG. 2, can be used in the mounting system 1 according to FIG. 1. The rapid-mounting mandrel 7 according to FIG. 3 differs from the design according to FIG. 2 in that it is designed as a mechanical mounting element. In this case, the adjusting screw 16 engages a tension rod 25 which extends through almost the entire cylindrical section 23 and is anchored at the end thereof by means of a plate 26. The position of the expansion regions 15, 22 corresponds to the exemplary embodiment according to FIG. 2. In the design according to FIG. 3, the wall thickness of the cylindrical section 23 is drastically reduced at the expansion regions 15, 22, so that the corresponding regions 15, 22 are elastically deformable by tensile forces that are introduced into the tension rod 25 and by compressive forces within the expansion regions 15, 22.

[0033] The mounting system 1 according to FIG. 4 differs from the embodiments according to FIGS. 2 and 3 in that the rapid-mounting device 10 is not integrated in the rapid-mounting mandrel 7, but in the magnet core 4. Accordingly, in this case, fluid channels 11 are located inside the magnet core 4. Via the fluid channels 11, pressure elements 12, which contact the rapid-mounting mandrel 7 at corresponding expansion regions 15, 22 at two axially spaced apart points, can be subjected to pressure. The axial distance between the pressure elements 12, which are arranged in an annular manner around the rapid-mounting mandrel 7, is denoted by LS. In an analogous manner, with the rapid-mounting mandrels 7 according to FIG. 2 and FIG. 3, LS is to be understood as the axial distance between the center of the expansion region 15 and the center of the expansion region 22. There is no possibility of pressure adjustment on the rapid-mounting mandrel 7 in the embodiment according to FIG. 4. The workpiece driver 6 is fastened to the rapid-mounting mandrel 7 by a single, central fixing screw 8 which is inserted through an opening 21 in the workpiece driver 6.

[0034] Further geometric features of a rapid-mounting mandrel 7, a workpiece driver 6 and a magnet core 4 are illustrated in FIGS. 5 and 6. Forces acting in the expansion regions 15, 22 are denoted by F. The mounting mechanism, not shown in FIG. 5, can work either hydraulically according to FIG. 2 or mechanically according to FIG. 3. In the latter case, as can be seen in FIG. 3, the cylindrical section 23 has a cavity 27.

[0035] In the embodiment according to FIG. 5, the magnet core 4 is fastened to the grinding spindle 2 with a central screw 28. The diameter of the receiving region 5 is somewhat reduced in the two annular sections of the receiving region 5, against which the expanding regions 15, 22 are pressed. This ensures that there is contact between the rapid-mounting mandrel 7 and the wall of the receiving region 5 only in two defined regions, the distance between which is LS. The minimum inside diameter of the receiving region 5 is denoted by DA (FIG. 1). The diameter DA is smaller than the length LS, i.e. the distance between the two expansion regions 15, 22.

[0036] In the embodiment according to FIG. 5, the receiving region 5 is sealed off from the outside by a seal 30 which is inserted between a groove on the end face of the magnet core 4 and a groove on the flange 24 of the rapid-mounting mandrel 7. The connection between the rapid-mounting mandrel 7 and the workpiece driver 6 is established according to FIG. 5 by a plurality of fixing screws 8 which are arranged in an annular region outside the central axis M. The fixing screws 8 are therefore located radially inside an annular edge region 31, which provides the workpiece stop surface 9. The adjusting screw 16, not shown in FIG. 5, can be actuated through the central opening 21 of the workpiece driver 6. In this way, the rapid-mounting mandrel 7 inserted into the magnet core can be practically mounted in a geometrically precisely defined position with a single motion. Then—without reworking the workpiece stop surface 9—the workpiece to be ground, for example a roller bearing ring, can immediately be placed on the workpiece stop surface 9 and mounted magnetically there.

REFERENCE NUMERALS

[0037] 1 Mounting system [0038] 2 Workpiece spindle [0039] 3 Magnet coil [0040] 4 Magnet core [0041] 5 Receiving region [0042] 6 Workpiece driver [0043] 7 rapid-mounting mandrel [0044] 8 Fixing screw [0045] 9 Workpiece stop surface [0046] 10 Rapid-mounting device [0047] 11 Fluid channel [0048] 12 Pressure element [0049] 13 Central fluid chamber [0050] 14 Outer fluid chamber [0051] 15 Expansion region [0052] 16 Adjusting screw [0053] 17 Piston [0054] 18 Operating tool [0055] 19 Driver stop surface [0056] 20 Driver receptacle [0057] 21 Opening [0058] 22 Expansion region [0059] 23 Cylindrical section [0060] 24 Flange [0061] 25 Tension rod [0062] 26 Plate [0063] 27 Cavity [0064] 28 Screw [0065] 29 Bore [0066] 30 Seal [0067] 31 Annular edge region [0068] DA Diameter of the receiving region [0069] F Force [0070] LS Length of the expansion system [0071] M Central axis