Brake Disc Arrangement Structure, Drive System, Double-Sided Grinding Machine, and Method for Machining Brake Discs

Abstract

The present invention relates to a brake disc arrangement (86) having a brake disc (12) with a friction ring (14) and a brake disc hub, the brake disc hub having an opening concentric with a central brake disc axis, the opening being bounded by a boundary closed on the peripheral side, characterized by a receiving device having a central receiving axis and centering means (60), the centering means having at least one centering surface, wherein the centering means (60) can be inserted into the opening of the brake disc hub in an inserted state of the centering means and, in a fixed state, interacts in a force-fitting and / or form-fitting manner with the boundary of the opening and / or with a surface portion of the brake disc hub adjacent to the boundary and secures the brake disc to the receiving device, wherein the receiving device has a pressing body (74) having a first pressing surface for pressing against an annular first end face of the brake disc hub. The present invention also relates to a drive system, a double-sided grinding machine and a method for machining a brake disc.

Description

[0001] Priority

[0002] This application claims priority to European Patent Application EP 22 174981.5, filed on May 24, 2022, the entire disclosure of which is incorporated herein by reference. Technical Field

[0003] The present invention relates to a brake disc arrangement, which comprises a brake disc having a friction ring and a brake disc pot having an opening that is concentric with a central brake disc axis and is bounded by a boundary that is closed on the peripheral side. Summary of the Invention

[0004] The object of the present invention is to be able to simply convey a brake disc in a system for machining the brake disc.

[0005] This object is achieved by a brake disc arrangement according to the present invention. The brake disc arrangement for conveying the brake disc in a system for machining the brake disc according to the present invention comprises the brake disc, which has a friction ring and a brake disc pot, the brake disc pot having an opening that is concentric with a central brake disc axis and is bounded by a boundary that is closed on the peripheral side, the brake disc arrangement comprising a receiving device having a central receiving axis and a centering device having at least one centering surface, wherein the centering device can be inserted into the opening of the brake disc pot in an inserted state of the centering device and, in a fixed state, interacts in a force-fitting and / or form-fitting manner with the boundary of the opening and / or with a surface portion of the brake disc pot adjacent to the boundary and fixes the brake disc to the receiving device, wherein the receiving device has a pressing body having a first pressing surface for pressing against an annular first end face of the brake disc pot, wherein the receiving device has a central shaft connected to the pressing body and a free end of the central shaft protruding from the centering device, wherein the free end has at least one coupling portion configured to produce a form-fitting and / or force-fitting acting along the axis of the central shaft together with a coupling mating portion provided by a spindle drive.

[0006] The receiving device can achieve a simple force fit and / or form fit with the boundary of the central opening of the brake disc hub and / or with the surface part of the brake disc hub adjacent to the boundary. Thereby, the central brake disc axis and the central receiving axis of the receiving device can be arranged to be aligned with each other, and the brake disc can be fixed in a region as far as possible from the friction surface of the friction ring of the brake disc. In addition, the receiving device includes a pressing body having a first pressing surface, and the first pressing surface is designed to press against the annular first end surface of the brake disc hub. Additionally, the pressing surface can particularly fix the brake disc in a region that is also spaced apart from the friction surface of the friction ring of the brake disc hub.

[0007] In particular, the fixing is effective during the transfer in which the central brake disc axis is horizontally oriented. Thereby, a "standing" transfer of the brake disc is achieved, in which the friction ring of the brake disc extends in a substantially vertical transfer plane. This is particularly advantageous in combination with the working gap of a double-sided grinding machine that extends in a vertical plane, the double-sided grinding machine having two grinding wheels with working surfaces facing each other, and each working surface is designed to machine one of the two friction surfaces of the friction ring.

[0008] Preferably, the centering device is pre-tensioned in the direction towards the fixed state, and / or the fixed state is the stationary state of the receiving device. The advantage in this regard is that no energy needs to be supplied from the outside to fix the brake disc to the receiving device of the brake disc arrangement structure. In particular, the receiving device cannot be connected to the tool spindle. Therefore, the brake disc arrangement structure is self-sufficient and remains in a state where the brake disc is fixed to the receiving device without any external energy supply.

[0009] A preferred possible option for applying and pre-tensioning the centering device is to use a spring, particularly a mechanical spring. Additionally or alternatively, the use of pneumatic and / or hydraulic springs can also be considered.

[0010] Further preferably, the receiving device has an actuating device for converting the centering device from the fixed state to the inserted state. This actuation can be accompanied by an energy supply from the outside; however, this energy supply is only required in the transition state when the centering surface is inserted into the opening of the brake disc hub.

[0011] Further preferably, the receiving device has a manipulation part having a manipulation surface for manipulation by an external gripper, where the manipulation surface preferably extends concentrically with the receiving axis. Such a manipulation surface enables simple gripping of the receiving device, particularly the receiving device on which the brake disc is fixed. The gripper can particularly be a two-jaw gripper, which can firmly grip the preferably cylindrical manipulation surface and can displace it to transfer the brake disc arrangement structure.

[0012] Preferably, the diameter of the clamping surface is at most half of the outer diameter of the friction ring of the brake disc of the brake disc arrangement. Thereby, the brake disc arrangement can be firmly clamped in a compact installation space.

[0013] The actuating part is preferably arranged on the side of the pressing body facing away from the first pressing surface. In this way, even a simply designed external gripper can be attached without collision.

[0014] Particularly preferably, the receiving device has a central axis which is connected to the pressing body and whose free end projects beyond the centering device. For example, the free end can be used to insert the brake disc arrangement together with the free end of the central axis into the guide sleeve of a drive system for rotatably driving the brake disc.

[0015] Particularly preferably, the free end has at least one coupling part for producing a form-fit and / or force-fit acting along the axis of the central axis with a coupling mating part provided by the main spindle drive of a drive system for rotatably driving the brake disc. The coupling mating part enables the central axis and thus the pressing body to be subjected to a pressure which presses the first pressing surface of the pressing body against the annular first end face of the brake disc hub.

[0016] The invention also relates to a drive system for rotatably driving a brake disc, wherein the drive system has a main spindle drive which has a second pressing surface which can be pressed against the annular second end face of the brake disc hub facing away from the first end face, and wherein the drive system includes the above-described brake disc arrangement. Thereby, the above-described receiving device can be used in the drive system, wherein the mutually facing end faces of the brake disc hub are arranged between the first pressing surface of the pressing body of the receiving device and the second pressing surface of the main spindle drive and are fixed between these pressing surfaces.

[0017] Particularly preferably, the drive system has a coupling mating part which interacts with the coupling part of the central axis of the receiving device and which exerts a tensioning force on the central axis such that the first pressing surface presses against the first end face of the brake disc hub and the second pressing surface presses against the second end face of the brake disc hub. In summary, the result is that the brake disc is arranged centered relative to the central main axis which is fixed in the region of the end faces of the brake disc hub, such that during the grinding of the friction surface of the brake disc friction ring, a very high torque can be applied to the friction surface without affecting the rotational drive of the brake disc (and thus, in particular, preventing slipping of the brake disc relative to the main spindle drive).

[0018] Particularly high torques can be applied when the first pressing surface and the second pressing surface overlap in the radial direction with respect to the axis of the central axis.

[0019] Particularly preferred drive systems include a manipulating device having a frame on which at least two holding members are arranged in a circumferentially distributed manner, each of the holding members having locking means for releasably arranging receiving means, wherein in order to move the holding members and selectively position a particular holding member on which a particular receiving means and a brake disc are fixed, the frame can be driven rotatably about a frame axis relative to a spindle drive by means of a rotary drive, wherein the frame axis is oriented perpendicular to the spindle axis of the spindle drive. Such a drive system enables a plurality of receiving means to be kept available - in particular the receiving means directly adjacent to the spindle drive - each of which is equipped with or can be equipped with a brake disc to be machined by grinding or a machined brake disc. Since the frame axis is oriented perpendicular to the spindle axis, the receiving means can be kept available in a relatively small space.

[0020] At least two holding members are provided, which are arranged circumferentially, in particular regularly distributed, for example two holding members are arranged circumferentially offset from each other by 180°. Three holding members or four holding members or at least four holding members can be provided.

[0021] The holding members can be connected to each other such that the circumferential distance between the holding members is immutable. Preferably, the holding members can be freely positioned and fixed circumferentially, for example, in order to change the number of holding members and / or to provide a brake disc receiving portion specific to the geometry of a certain brake disc.

[0022] Preferably, the frame is arranged on a carriage which can be driven by a carriage drive relative to a carriage support along a carriage axis in a direction towards the spindle drive and in the opposite direction. Thereby, it is possible to simplify the transfer of a brake disc arrangement structure with a brake disc to be ground to the spindle drive, and to simplify the transfer of a brake disc arrangement structure with a ground brake disc from the spindle drive. The carriage support can extend, for example, in a horizontal plane which is particularly in or parallel to the top surface of the machine bed of a double-sided grinding machine. The carriage support can also extend in a vertical plane which is particularly perpendicular to the top surface of the machine bed of the double-sided grinding machine.

[0023] Particularly preferably, receiving means for receiving a brake disc having a first brake disc geometry are arranged on at least one first holding member or respectively on at least two first holding members, and receiving means for receiving a brake disc having a second brake disc geometry different from the first brake disc geometry are arranged on at least one second holding member or respectively on at least two second holding members. Thereby, it is possible to flexibly machine brake discs having different geometries (in particular geometries with different outer diameters and / or inner diameters of the friction ring). This means that different brake discs can also be machined "chaotically"; no conversion operations are required anymore to machine a continuous series of brake discs having different geometries.

[0024] In another preferred embodiment, the actuating device has an actuating drive for actuating the actuating means of the receiving device, which actuating drive is arranged in a manner that is in particular non-rotatable relative to the frame axis. Thereby, the corresponding receiving device can be transferred from the fixed state of the receiving device to the inserted state, in particular for fitting a brake disc to be machined by grinding onto the receiving device and for releasing the brake disc that has been machined by grinding from the receiving device.

[0025] In another preferred embodiment, the actuating device has a release drive for releasing the locking device, which release drive is arranged in a manner that is in particular non-rotatable relative to the frame axis. Thereby, the receiving device equipped with the brake disc to be machined by grinding can be released from the holding means in order to prepare for its transfer to the spindle drive, in particular for coupling it to the spindle drive.

[0026] Furthermore, the actuating device itself discussed in the context and its combined use with the receiving device for releasably receiving the brake disc are also advantageous. Such a receiving device can have all the features of the receiving device described above. Such a receiving device can also only have a subset of the features of the receiving device described above or not have any of the features of the receiving device described above.

[0027] The invention also relates to a double-sided grinding machine having two grinding wheels and having the drive system described above. In particular, the grinding wheels can be driven in a rotatable manner about a horizontally oriented grinding wheel axis.

[0028] The invention also relates to a method for machining a brake disc, which includes: transferring the brake disc from a brake disc supply section to the drive system according to the invention using the brake disc arrangement structure according to the invention, connecting the coupling portion of the free end of the central shaft of the receiving device to the coupling mating portion of the spindle drive of the drive system, applying a tension force to the coupling mating portion, pressing the first pressing surface against the first end face of the brake disc hub, and pressing the second pressing surface against the second end face of the brake disc hub, positioning the friction ring in the working chamber gap of the double-sided grinding machine according to the invention, and grinding the friction surface of the friction ring while maintaining the pressing contact of the pressing surfaces. Description of the Drawings

[0029] Other features and advantages of the invention are the subject of the following description and the graphical description of the preferred exemplary embodiments.

[0030] Figure 1 A perspective view of the system for grinding a brake disc in the initial state;

[0031] Figure 2A perspective view of the system according to Figure 1 in a state where the brake disc is prepared to be fixed to the receiving device;

[0032] Figure 2 a shows a vertical section along the section shown by IIa in Figure 2 ;

[0033] Figure 2 b shows an enlarged view of the detail indicated by IIb in Figure 2 a;

[0034] Figure 3 A detail corresponding to Figure 2 b in a state where the brake disc is fixed to the receiving device and forms a brake disc arrangement together with the receiving device;

[0035] Figure 4 A perspective view of the system according to Figure 3 in the transportation state of the brake disc arrangement according to Figure 1 ;

[0036] Figure 5 A perspective view of the system according to Figure 3 in a state where the connection between the brake disc arrangement according to Figure 1 and the spindle drive of the drive system of the double-sided grinding machine is prepared;

[0037] Figure 5 a shows a vertical section along the section shown by Va in Figure 5 ;

[0038] Figure 5 b shows an enlarged view of the detail indicated by Vb in Figure 5 a;

[0039] Figure 6 A detail corresponding to Figure 5 b in a state where the brake disc arrangement and the spindle drive are connected to each other;

[0040] Figure 7 A perspective view of the system according to Figure 1 during the grinding process of the brake disc;

[0041] Figure 8 A plan view of another brake disc arrangement used in the system according to Figures 1 to 7 ;

[0042] Figure 8 a shows a vertical section of the brake disc arrangement according to Figure 8 in a fixed state;

[0043] Figure 8b shows a diagram corresponding to Figure 8 a in the inserted state;

[0044] Figure 8 c shows an enlarged view of the detail represented by VIIIc in Figure 8 b;

[0045] Figure 9 shows a vertical section of another brake disc arrangement used in a system according to Figures 1 to 7 ;

[0046] Figures 10a to 10h show plan views of an embodiment of a double-sided grinding machine having a drive system and a control device during successive operating phases; and

[0047] Figure 11 shows a vertical section of the control device along the section represented by XI-XI in Figure 10c. DETAILED DESCRIPTION

[0048] Figure 1 , 2 , 4, 5 and 7 show perspective views and different states of a system for grinding a brake disc. These states relate to the brake disc represented by reference numeral 12 and passing through the system 10.

[0049] The brake disc 12 has a friction ring 14 and a brake disc hub 16. The brake disc hub 16 has a central opening 18. The opening 18, the brake disc hub 16 and the friction ring 14 extend concentrically with the central brake disc axis 20.

[0050] The system 10 has a receiving area 22 for receiving the brake disc 12 and a double-sided grinding machine 24 including a drive system 26 for rotatably driving the brake disc 12. To transfer the brake disc 12 between the receiving area 22 and the drive system 26 of the double-sided grinding machine 24, the system 10 includes a transfer area 28.

[0051] The receiving area 22 is adjacent to a feed section 30 for the brake disc 12 to be ground and a discharge section 32 for the ground brake disc 12. Referring to Figure 1 and 5 , a fixed frame 34 is provided between the feed section 30 and the discharge section 32 and is used to arrange a rotating plate 36. The rotating plate 36 can rotate relative to the frame 34 about a vertical axis 38 and can move relative to the frame 34 along a horizontal stroke axis 40.

[0052] The rotary plate 36 has two brake disc receiving portions 42 and 44 which are pivotable about their respective associated horizontal pivot axes 46, 48 between a horizontal position and a vertical position. In order to fix the brake disc 12 to the brake disc receiving portions 42, 44, each brake disc receiving portion has a bearing surface 50 and an opposing holding member 52 spaced apart from the bearing surface 50. In the horizontal position of one of the brake disc receiving portions 42, 44, the bearing surface 50 faces upward.

[0053] In Figure 1 it is shown the brake disc 12 received from the feed portion 30 in the state where the brake disc is resting on the bearing surface 50 of the brake disc receiving portion 42 and is fixed by the opposing holding member 52 in the region of the friction ring 14. Also compare Figure 2 with FIGS. 2a and 2b, from this state, the rotary plate 36 rotates 180° about the vertical axis 38 and the brake disc receiving portion 42 pivots about the pivot axis 46 such that the brake disc 12 is in the Figure 2 vertical position shown.

[0054] The system 10 further includes a first receiving device 54, the structure and function of which are described below with reference to Figure 2 FIGS. 3b and 3.

[0055] The opening 18 of the brake disc 12 is bounded by a boundary 56 closed on the peripheral side. The first receiving device 54 extends along a central receiving axis 58 and has centering means 60.

[0056] The centering means 60 has a clamping cone 62 and a clamping sleeve 64, the clamping sleeve 64 having a centering surface 66. The clamping cone 62 is connected to a piston 68 by a tie rod (not shown in the figures), and in particular the piston 68 is pre-tensioned in the pre-tensioning direction 70 by a spring 72. The spring 72 is designed as a compression spring and exerts a compressive force on both the piston 68 and the pressing body 74 of the first receiving device 54.

[0057] The pressing body 74 has a first pressing surface 76, in particular an annular first pressing surface, for pressing against the annular first end face 78 of the brake disc hub 16. The brake disc hub also has a second end face 80 facing away from the first end face 78.

[0058] In the rest state of the first receiving device 54, the centering means 60 is pre-tensioned by the spring 72, wherein the pre-tensioning force is transmitted through the piston 68 and the tie rod to the clamping cone 62 and presses the clamping cone into the clamping sleeve 64 such that the centering surface 66 of the clamping sleeve 64 is pushed radially outwards. In this state, the centering surface 66 has a larger diameter than the boundary 56 of the opening 18 of the brake disc 12.

[0059] In order to reduce the diameter of the centering surface 66, the first receiving device 54 has an actuating device 82 which has a pressure chamber 84 that is supplied by a pipeline 86 (compareFigure 2 )。The pressure chamber 84 acts on the side of the piston 68 facing away from the spring 72, such that an increase in the pressure in the pressure chamber 84 causes the pressure chamber 84 to increase against the action of the spring 72. This is accompanied by the clamping cone 62 being removed from the clamping sleeve 64, such that the centering surface 66 decreases and can be inserted into the opening 18 of the brake disc 12 in the inserted state.

[0060] Control Figure 3 , for said insertion, the central brake disc axis 20 and the central receiving axis 58 are arranged to be aligned with each other. The rotary plate 36 moves along the stroke axis 40, such that the centering device 60 starts from the spaced arrangement of the brake disc 12 and the first receiving device 54 (control Figure 2 b) and is inserted into the opening of the brake disc 12. By releasing the actuating device 82 (the pressure in the pressure chamber 84 drops), the spring 72 again exerts a pre-tensioning force on the clamping cone 62, such that the centering surface 66 of the centering device 60 is force-fitted and tensioned against the boundary 56 of the opening 18 of the brake disc 12. At the same time, the first pressing surface 76 of the pressing body 74 contacts the first end face 78 of the brake disc hub 16.

[0061] The brake disc 12 and the first receiving device 54 together form a brake disc arrangement 86, which is supplied from the receiving area 22 through the transfer area 28 to the drive system 26 of the system 10.

[0062] The first receiving device 54 also has a central shaft 88, which extends along the axis 90 and is particularly integrally connected to the pressing body 74. The central shaft 88 passes through the centering device 60. Control Figure 2 b, the central shaft 88 has a coupling portion 92 at its free end, which projects out of the centering device 60.

[0063] The first receiving device 54 also has a housing 94, which is connected to the pressing body 74 and is used to accommodate the spring 72, the piston 68 and the pressure chamber 84. The housing 94 forms a control portion 96 with a cylindrical control surface 98 (control Figure 3 ), which extends concentrically with the receiving axis 58 of the first receiving device 54. The control portion 96 is particularly arranged on the side of the pressing body 74 facing away from the first pressing surface 76.

[0064] Control Figure 2 , the control surface 98 is used to control the first receiving device 54, i.e., particularly to use the gripper 100 to control the first receiving device 54.

[0065] Control Figure 4 , the gripper 100 is part of a transfer device 102 with a transfer axis 104, which is used to transfer the brake disc arrangement 86 from the receiving area 22 to the drive system 26.

[0066] The transfer device 102 has a transfer arm 106, which is driven by a motor along a transfer axis 104, and a transfer rocker 108 is mounted on the transfer arm 106 to pivot about an axis 110.

[0067] The transfer rocker 108 is used to arrange a gripper 100 (in particular a two-jaw gripper), and preferably to arrange another gripper 112. Figure 4 In contrast, this other gripper 112 is also designed to grip the operating surface 98 of the first receiving device 54.

[0068] From Figure 3 the state shown (in which the brake disc 12 is fixed to the first receiving device 54), first the brake disc 12 is disengaged from the brake disc receiving portion 42. For this purpose, Figure 4 the transfer rocker 108 starts from the state according to Figure 2 and pivots upward together with the brake disc arrangement 86 according to Figure 3 . Thereby, the brake disc receiving portion 42 can pivot back from the vertical position (see Figures 2 to 3 ) to its horizontal position (see Figure 4 ). In this way, Figure 4 and 5 , the transfer arm 106 together with the transfer rocker 108 and the gripper 100 can be provided along the transfer axis 104 without collision with the brake disc arrangement 86 to the drive system 26 of the double-sided grinding machine 24.

[0069] The drive system 26 is arranged on the machine tool 114 of the double-sided grinding machine 24. The machine tool 114 is used to support two grinding wheel drives 116 and 118, and the corresponding grinding wheels 120, 122 can be driven in a rotational manner by these two grinding wheel drives. Figure 7 In contrast, these two grinding wheels 120 and 122 define a working gap 124 extending in a vertical plane.

[0070] The drive system 26 is arranged to be laterally offset with respect to the working gap 124 and includes a carriage 126, which can be moved relative to the machine tool 114 and, in particular, can be moved in the direction towards the working gap 124 and in the opposite direction along a horizontal feed axis 130 by means of a known carriage drive (not shown in the figures) with the aid of a guide 128.

[0071] In contrast Figure 5 to b and 6, the carriage 126 is used to arrange a spindle drive 132 having a spindle housing 134. The spindle housing 134 can be moved relative to the carriage 126 along a horizontal stroke axis 136, where the stroke axis 136 is perpendicular to the feed axis 130.

[0072] The spindle drive 132 has a spindle 131 which has a second pressing surface 138 that is formed in an annular shape and can move along a stroke axis 136 together with the spindle drive 132. The spindle drive 132 has a spindle axis 140, and the spindle 131 having the second pressing surface 138 can be rotationally driven about the spindle axis 140.

[0073] In Figures 5 to 5 b, a state is shown in which the brake disc arrangement 86 still remains on the holder 100, and the axis 90 of the central axis 88 of the first receiving device 54 is arranged to be aligned with the spindle axis 140. In this case, the second pressing surface 138 of the spindle drive 132 initially still remains spaced apart from the second end face 80 of the brake disc hub 16 of the brake disc 12.

[0074] The spindle drive 132 has a coupling mating part 142 which is designed to interact with the coupling part 92 of the central axis 88. The coupling mating part 142 has a movable form - fitting element (not numbered in the drawing), and the relative position of the form - fitting elements can be adjusted by a coupling drive 144 such that the form - fitting elements have a larger distance from each other (cf. Figure 5 b) or a smaller distance from each other (cf. Figure 6 ).

[0075] The larger distance between the form - fitting elements of the coupling mating part 142 enables the spindle drive 132 to move along the stroke axis 136 in the direction towards the brake disc arrangement 86 starting from the state shown in Figure 5 b. In this way, the free end of the central axis 88 of the first receiving device 54 can be inserted into the coupling mating part 142. Furthermore, cf. Figure 6 , the second pressing surface 138 comes into contact with the second end face 80 of the brake disc hub 16.

[0076] Cf. Figure 6 , the actuation of the coupling drive 144 causes the coupling mating part 142 to engage with the coupling part 92 of the free end of the central axis 88 in a form - fitting manner. Furthermore, the coupling drive 144 exerts a tension force on the coupling mating part 142 and thus on the central axis 88, and this tension force is transmitted to the first end face 78 of the brake disc hub 16 through the pressing body 74 and its first pressing surface 76. At the same time, the second pressing surface 138 of the spindle drive 132 presses against the second end face 80 of the brake disc hub 16, such that the brake disc hub 16 is firmly clamped between the first pressing surface 76 of the pressing body 74 of the first receiving device 54 and the second pressing surface 138 of the spindle drive 132. This is the state shown in Figure 6 .

[0077] In the next step, the gripper 100 is removed from the manipulation surface 98 of the first receiving device 54, and the spindle drive 132 together with the brake disc arrangement 86 is moved along the feed axis 130 in the direction towards the working gap 124 of the double-sided grinding machine 24 until the friction ring 14 of the brake disc 12 is inserted into the working gap 124. Subsequently, the friction surface of the friction ring 14 is ground by the two grinding wheels 120 and 122.

[0078] After the brake disc 12 has been ground, the first receiving device 54 can again be used to feed the brake disc into the receiving area 22 at all times. Here, the brake disc 12 can be separated from the receiving device and removed as a finished component at the discharge section 32 (cf. Figure 1 ).

[0079] In Figures 8 to 8 c, another embodiment of the brake disc arrangement 86 with the brake disc 12 and the first receiving device 54 is shown. Compared to the force-fit centering of the centering device 60 described above, the centering device 60 of the first receiving device 54 of this other embodiment acts in a form-fit manner on the boundary 56 of the opening 18 of the brake disc hub 16. For this purpose, the centering device 60 has at least one form-fit element 146, in particular two, three or four form-fit elements 146, which are preferably arranged in a regularly distributed manner along the circumference. These elements are spring-loaded and extend further radially outwards in the rest state (cf. Figure 8 a) than in the inserted state (cf. Figure 8 b and 8c).

[0080] In order to change the centering device 60 from the rest state according to Figure 8 a to the inserted state shown in Figure 8 b and 8c, an actuating device 82 in the form of an actuating pin 148 is provided.

[0081] The centering device 60 includes a centering ring 150 which forms a radially outwardly directed centering surface 66. The centering ring 150 is part of the central shaft 88 or is provided separately from the central shaft 88.

[0082] In the illustrated embodiment, the centering ring 150 has an additional function and forms a stop for the adjusting springs 152 which are associated with the form-fit elements 146 and which act radially inwards on the form-fit elements 146. The form-fit elements 146 interact with a blocking ball 154 at their radially inner ends.

[0083] The actuating pin 148 counteracts the pre-tensioning force of the spring 72 and releases the locking element 146 by blocking the displacement of the ball 154, such that the adjusting spring 152 radially inwardly presses the form-fitting element 146, so that the boundary 56 of the opening 18 of the brake disc 12 can be displaced onto the centering surface 66 beyond the radially outer end of the form-fitting element 146.

[0084] By releasing the actuating device 82, the spring 72 relaxes again, such that the ball 154 is again in the blocking position, in which the form-fitting element 146 is radially outwardly pushed against the action of the relatively weak adjusting spring 152. In this state, the radially outer end of the form-fitting element 146 engages in a rearward manner / form-fits with the surface section 156 of the second end face 80 of the brake disc hub 16. The surface section 156 abuts the boundary 56.

[0085] In Figure 9 there is shown another embodiment of a brake disc arrangement 86 having a brake disc 12 and a first receiving device 54. The centering device 60 of the first receiving device 54 of this other embodiment interacts in a form-fitting manner with the boundary 56 of the opening 18 of the brake disc hub 16. For this purpose, the centering device 60 has a spherical form-fitting element 146, which is mounted on an extrusion body 74. The form-fitting element is arranged more radially outward in the ( Figure 9 shown) rest state than in the (not shown) inserted state.

[0086] The extrusion body 74 includes an annular body 162, which faces the brake disc hub and has an annular first extrusion surface 76 for pressing against the annular first end face 78 of the brake disc hub 16.

[0087] The centering device 60 includes a radially outwardly directed centering surface 66 that is part of a central shaft 88.

[0088] To convert the centering device 60 from the rest state according to Figure 9 to the inserted state, an actuating device 82 in the form of an actuating pin 148 is provided.

[0089] In the rest state, the actuating surface 158 of the actuating pin 148 radially outwardly presses the form-fitting element 146, such that the form-fitting element 146 form-fits with the boundary 56 of the opening 18 of the brake disc hub 16 and fixes the brake disc 12 to the first receiving device 54.

[0090] When the actuating pin 148 is driven against the pre-tensioning force of the spring 72, the actuating surface 158 disengages from the form-fitting element 146; conversely, the deflection surface 160 engages effectively with the form-fitting element 146. The deflection surface 160 is radially inwardly offset relative to the actuating surface 158 such that the form-fitting element 146 is deflected radially inwardly and releases the form fit with the boundary 56 of the opening 18 of the brake disk hub 16.

[0091] It should be understood that the first receiving device 54 according to Figures 8 to 8 c and the receiving device according to Figure 9 can be used in the system 10 according to Figures 1 to 7 .

[0092] The double-sided grinding machine 24 shown in FIGS. 10a to 10h has grinding drives 116, 118 and a drive system 26 including a spindle drive 132, wherein for the construction and function of the double-sided grinding machine, reference is made to the above description of the double-sided grinding machine according to Figures 4 to 7 .

[0093] The double-sided grinding machine 24 according to FIGS. 10a to 10h includes a control device, which is generally designated by the reference numeral 200 in the drawings.

[0094] The control device 200 has a carriage support 202 connected to the machine tool 114 of the double-sided grinding machine 24. The carriage support 202 defines a carriage axis 204 parallel to the spindle axis 140.

[0095] The carriage 206 is mounted on the carriage support 202 so as to be movable along the carriage axis 204 and can be driven by a known carriage drive (not shown in the figures), and thus the carriage 206 can be moved in the direction towards the spindle drive 132 and in the opposite direction.

[0096] The frame 208 is arranged on the carriage 206 and can be rotated about a frame axis 212 by a rotary drive 210. The frame axis 212 is perpendicular to the spindle axis 140.

[0097] The frame 208 has a frame structure 216 extending along the circumference 214 and is formed, for example, as a groove having a closed run on the peripheral side. The frame structure 216 is used for arranging and in particular releasably fixing at least two holding elements: a first holding element 218, a second holding element 218', each holding element being connectable to the frame structure 216 along the circumference 214 at a selected position, for example by means of a slide that can be tightened or clamped in the groove.

[0098] The first holding element 218, the second holding element 218' are used for releasably holding the first receiving device 54, the second receiving device 54', for example according to Figure 9The receiving device. The first holding member 218 has a holding portion 220, and one of the first receiving device 54 and the second receiving device 54' is held on the holding portion 220.

[0099] The locking device 222 is used to releasably lock the first receiving device 54 and the second receiving device 54' on the holding portion 220. In the locked state of the locking device 222, the first receiving device 54 is locked on the holding portion 220. In the released state of the locking device 222, the first receiving device 54 and the second receiving device 54' can be released from the corresponding holding portion 220. The locking device 222 can be actuated by the release device 224, and the release device 224 converts the locking device 222 from the locked state to the released state.

[0100] The release device 224 cannot rotate relative to the frame 208 and is arranged on the bracket 206; therefore, the release device 224 cannot rotate with the frame 208 about the frame axis 212.

[0101] The actuating device 200 further has an actuating driver 226. The actuating driver 226 cannot rotate relative to the frame 208 and is arranged on the bracket 206; therefore, the actuating driver 226 cannot rotate with the frame 208 about the frame axis 212. In contrast Figure 9 , the actuating driver 226 is used to actuate the actuating device 82 of the first receiving device 54.

[0102] Actuating the actuating device 82 is accompanied by the fact that the actuating driver 226 exerts a compressive force on the actuating pin 148 and converts the first receiving device 54 from the fixed state to the inserted state, whereby the brake disc 12 can be assembled on the first receiving device 54 or the brake disc 12 can be removed from the first receiving device 54.

[0103] The first holding member 218 and the second holding member 218' are respectively provided with the first receiving device 54 and the second receiving device 54', wherein all the first receiving devices 54 and the second receiving devices 54' can be the same and are used to receive the brake disc 12 with the same brake disc geometry.

[0104] Alternatively, one first receiving device 54 of the first holding member 218 or two first receiving devices 54 of the first pair of holding members 218 are designed to receive the brake disc 12 with the first brake disc geometry, and one second receiving device 54' of the second holding member 218' or two second receiving devices 54' of the second pair of second holding members 218' are designed to receive the brake disc 12 with the second brake disc geometry different from the first brake disc geometry.

[0105] The first retaining member 218 and the first receiving device 54 in the first pair and / or the second retaining member 218' and the second receiving device 54' in the second pair are preferably arranged relative to each other with respect to the frame axis 212; there is an offset of, for example, 30° or 45° or 60° (shown in the figure) or 90° about the frame axis 212 between the first retaining member 218 and the second retaining member 218' in different pairs.

[0106] In the initial state of the double-sided grinding machine 24, neither the first receiving device 54 nor the second receiving device 54' is equipped with the brake disc 12 or 12'; the working gap 124 is open; the spindle drive 132 is oriented such that the spindle axis 140 is aligned with the carriage axis 204. The carriage 206 is spaced from the spindle drive 132; the frame 208 is positioned about the frame axis 212 such that the first retaining member 218 is arranged in the region of the actuating drive 226 and faces the outer region of the double-sided grinding machine 24. In this position of the first retaining member 218, its first receiving device 54 can be actuated by the actuating drive 226 and switched to the inserted state, in which state the receiving device 54 can be equipped with the first brake disc 12. By deactivating the actuating drive 226, the first receiving device 54 (with the assistance of the spring 72, against Figure 9 ) reaches the fixed state, in which the first brake disc is fixed to the first receiving device 54. This initial state is shown in Fig. 10a.

[0107] Starting from the state shown in Fig. 10a, the frame 208 is rotated 90° (clockwise in the figure) about the frame axis 212 by the rotary drive 210, and then the carriage 206 is moved in the direction towards the spindle drive 132 until the second end face 80 of the first brake disc 12 (against Figure 9 ) contacts the second pressing surface 138 of the spindle drive 132 (against Fig. 10a). This state is shown in Fig. 10b.

[0108] Starting from the state shown in Fig. 10b, the actuating locking device 222 is actuated such that the first receiving device 54 can be removed from the retaining portion 220 of the first retaining member 218. Subsequently, the coupling portion 92 of the first receiving device 54 (against Figure 9 ) is coupled to the coupling mating portion 142 of the spindle drive 132. This coupling has been described above with reference to Figure 5 b and 6; reference will be made to these descriptions. In this way, the brake disc arrangement 86 is connected to the spindle drive 132. Subsequently, the carriage 206 is removed from the spindle drive 132. This state is shown in Fig. 10c.

[0109] Starting from the state shown in FIG. 10c, the spindle drive 132 together with the brake disc arrangement 86 is moved along the feed axis 130 in the direction towards the working gap 124 of the double-sided grinding machine 24 until the friction ring 14 of the first brake disc 12 is inserted into the working gap 124. Subsequently, the friction surface of the friction ring 14 is ground by the two grinding wheels 120 and 122.

[0110] During the grinding of the first brake disc 12, the transfer of the second brake disc 12' (cf. FIG. 10e) can be prepared by means of the actuating device 200. For this purpose, the frame 208 rotates 30° (in the clockwise direction in the figure) about the frame axis 212 starting from the state according to FIG. 10c, so that the second holding means 218' together with another second receiving device 54' are arranged in the region of the actuating drive 226. This state is shown in FIG. 10d.

[0111] In the manner described above, the second brake disc 12' is connected to the second receiving device 54'. Subsequently, the frame 208 rotates 30° (in the counterclockwise direction in the figure) about the frame axis 212 starting from the state shown in FIG. 10d, thereby returning the first holding means 218 to the position in which the first receiving device 54 faces the spindle drive 132. This state is shown in FIG. 10e.

[0112] After the grinding of the first brake disc 12 is completed, the first brake disc 12 is released by increasing the working gap 124. The spindle drive 132 together with the ground brake disc 12 and the first receiving device 54 is moved backward along the feed axis 130 until the spindle axis 140 is aligned with the carriage axis 204 again.

[0113] Subsequently, the carriage 206 is moved in the direction towards the spindle drive 132, releasing the coupling pair 142 and actuating the release device 224 so that the first receiving device 54 can be transferred from the holding part 220 of the first holding means 218. This state is shown in FIG. 10f.

[0114] Subsequently, the frame 208 rotates 120° (in the clockwise direction in the figure) about the frame axis 212 so that the second holding means 218', the second receiving device 54' and the second brake disc 12' face the spindle drive 132. This state is shown in FIG. 10g.

[0115] Subsequently, referring to FIG. 10h, the second receiving device 54' and the second brake disc 12' can be connected to the spindle drive 132 in the manner described above so that the second brake disc 12' can be ground.

[0116] During the grinding process of the second brake disc 12', the first brake disc 12 that has been ground can be removed from the first receiving device 54. For this purpose, the frame 208 rotates 150° (clockwise in the figure) about the frame axis 212, so that the first receiving device 54 is arranged in the area of the actuating drive 226. By actuating the actuating device 82, the brake disc 12 can be unloaded from the receiving device, and then a new brake disc 12 can be provided.

[0117] In Figure 11 it, other components of the first holding member 218, the locking device 222 and the releasing device 224 are shown.

[0118] The holding portion 220 of the first holding member 218 has a receiving space 228 for receiving at least a part of the pressing body 74 of the first receiving device 54. The receiving space 228 is adjacent to the hole 230, which serves as a passage for the free end of the actuating device 82 of the first receiving device 54. In this way, the actuating drive 226 can interact with the actuating device 82 while the first receiving device 54 is held on the holding portion 220.

[0119] The locking device 222 has a movable form - fitting element 232, which is formed, for example, in the shape of a pin and fixed to the plate 234. The plate 234 is pre - tensioned by a spring 236 in the direction towards the locked state of the locking device 222. In the locked state, the form - fitting element 232 penetrates into the receiving space 228 and interacts with the corresponding form - fitting receiving portion of the pressing body 74.

[0120] To switch the locking device 222, the release element 238 of the release device 224 presses the plate 234 out of the receiving space 228 against the action of the spring 236, thereby releasing the form - fit with the pressing body 74.

[0121] The release element 238 is formed, for example, by a piston that can be acted upon by the pressure in the cylinder 240. Additionally or alternatively, a handle 242 connected to the plate 234 is provided, which allows the plate 234 to be manually moved against the action of the spring 236.

Claims

1. A brake disc arrangement (86) for transporting a brake disc (12) in a system for machining the brake disc (12), comprising the brake disc (12), the brake disc having a friction ring (14) and a brake disc hub (16), the brake disc hub having an opening (18) concentric with a central brake disc axis (20), the opening being bounded by a boundary (56) closed on the peripheral side, the brake disc arrangement comprising receiving means having a central receiving axis (58) and centering means (60), the centering means having at least one centering surface (66). Wherein, the centering means (60) can be inserted into the opening (18) of the brake disc hub (16) in the inserted state of the centering means (60) and interact with the boundary (56) of the opening (18) and / or with the surface portion (156) of the brake disc hub (16) adjacent to the boundary (56) in a force-fitting and / or form-fitting manner in the fixed state, and fix the brake disc (12) to the receiving means, wherein the receiving means has a pressing body (74), the pressing body having a first pressing surface (76) for pressing against an annular first end face (78) of the brake disc hub (16), wherein the receiving means has a central shaft (88), the central shaft being connected to the pressing body (74), and the free end of the central shaft protruding from the centering means (60), wherein the free end has at least one coupling portion (92), the coupling portion being configured to produce a form-fitting and / or force-fitting acting along the axis (90) of the central shaft (88) together with a coupling mating portion (142) provided by a spindle drive (132).

2. The brake disc arrangement (86) according to claim 1, characterized in that, the brake disc arrangement (86) is configured such that the fixing of the brake disc (12) on the receiving means is effective during transportation with the central brake disc axis (20) oriented horizontally.

3. The brake disc arrangement (86) according to claim 1 or 2, characterized in that, the centering means (60) is pre-tensioned in the direction towards the fixed state, and / or the fixed state is a stationary state of the receiving means.

4. The brake disc arrangement (86) according to claim 3, characterized in that, the receiving means has a spring (72) for acting on the centering means (60).

5. The brake disc arrangement (86) according to claim 1 or 2, characterized in that, the receiving means has an actuating means (82) for changing the centering means (60) from the fixed state to the inserted state.

6. The brake disc arrangement (86) according to claim 1 or 2, characterized in that, the receiving means has a manipulation portion (96), the manipulation portion having a manipulation surface (98) for being manipulated by an external gripper (100).

7. The brake disc arrangement (86) according to claim 6, It is characterized in that, the control surface (98) extends concentrically with the receiving axis (58).

8. The brake disc arrangement (86) according to claim 7, It is characterized in that, the control surface (98) has a diameter that is at most half of the outer diameter of the friction ring (14).

9. The brake disc arrangement (86) according to claim 6, It is characterized in that, the control part (96) is arranged on the side of the extrusion body (74) facing away from the first extrusion surface (76).

10. A drive system (26) for rotatably driving the brake disc (12) of the brake disc arrangement (86) according to any one of claims 1 to 9, wherein, the drive system (26) includes the brake disc arrangement (86), and wherein the drive system (26) has a spindle drive (132) having a second extrusion surface (138) that can be pressed against an annular second end surface (80) of the brake disc hub (16) facing away from the first end surface (78).

11. The drive system (26) according to claim 10, It is characterized in that, the drive system (26) includes a coupling pair part (142) that interacts with the coupling part (92) of the central axis (88) and applies a tension force to the central axis (88), such that the first extrusion surface (76) is pressed against the first end surface (78) of the brake disc hub, and such that the second extrusion surface (138) is pressed against the second end surface (80) of the brake disc hub (16).

12. The drive system (26) according to claim 11, It is characterized in that, the first extrusion surface (76) and the second extrusion surface (138) overlap in the radial direction with respect to the axis (90) of the central axis (88).

13. A double-sided grinding machine (24) having two grinding wheels (120, 122) and having the drive system (26) according to any one of claims 10 to 12.

14. The double-sided grinding machine (24) according to claim 13, It is characterized in that, the grinding wheels (120, 122) can be driven to rotate about a horizontally oriented grinding wheel axis.

15. A method for machining a brake disc (12), the method comprises: - using the brake disc arrangement (86) according to any one of claims 1 to 9 to transfer the brake disc (12) from a brake disc supply section to the drive system (26) according to claim 11 or 12, - connecting the coupling part (92) at the free end of the central axis (88) of the receiving device to the coupling pair part (142) of the spindle drive (132) of the drive system (26), - Apply a tension force to the coupling mating part (142), press the first pressing surface (76) against the first end face (78) of the brake disc hub (16), and press the second pressing surface (138) against the second end face (80) of the brake disc hub (16). - Position the friction ring (14) in the working gap (124) of the double-sided grinding machine (24) according to claim 13 or 14. - Grind the friction surface of the friction ring (14) while maintaining the pressing contact of the pressing surfaces (76, 138).

Images