JP2005059119A - Grinding wheel and working method of rolling bearing device for wheel using the grinding wheel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a grinding wheel, easily grinding the whole surface to be ground even if a projection is projected from the surface to be ground, and a working method of a rolling bearing device for a wheel using the grinding wheel. <P>SOLUTION: The respective shaft parts of five bolts 10 passed and fixed concentrically to a flange 5 for fitting a brake disk are externally fitted to five elongated grooves 20 substantially concentrically formed on a grinding surface 19 of the grinding wheel 15, and in the condition where the brake disk fitting surface 11 and the grinding surface 19 are brought into contact with each other, the brake disk fitting surface is put in the state of being disabled from rotating in the circumferential direction. In this condition, the grinding wheel 15 is rocked in the circumferential direction to grind the brake disk fitting surface 11. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a grindstone and a method for processing a wheel rolling bearing device using the grindstone.

  Conventionally, as a processing method of a wheel rolling bearing device, there is one described in Japanese Patent Application Laid-Open No. 2002-370104 (Patent Document 1). The wheel rolling bearing device processing method includes assembling the outer ring, the inner ring, and a plurality of balls of the wheel rolling bearing device, and then, with the central axis of the wheel rolling bearing device oriented in the vertical direction, While fixing the flange surface of the flange part formed in the lower end of the vertical direction to the fixed base of the rolling bearing device for the wheel, the spindle fitted in the upper end of the inner ring in the vertical direction is rotated. By rotating the flange surface to be cut of the flange portion formed at one end portion on the upper side in the vertical direction of the inner ring, the rotating flange surface to be cut is brought into contact with the precision machining tool, and the inner ring The flange surface to be cut is cut.

However, in the conventional method for processing a rolling bearing device for a wheel, the outer ring is fixed, and then the cutting flange surface of the inner ring is cut by bringing the cutting flange surface of the rotating inner ring into contact with a precision cutting tool. Therefore, when a protruding object such as a bolt shaft protrudes from the surface of the flange to be cut of the inner ring, this protruding object becomes an obstacle and cuts the flange surface to be cut from which the protruding object protrudes. And there is a problem that it is difficult to cut the entire flange surface to be cut.
Japanese Patent Laid-Open No. 2002-370104 (FIG. 4)

  Therefore, an object of the present invention is to provide a grindstone that can easily grind the entire surface to be ground even if a projecting object protrudes from the surface to be ground, and a processing method for a wheel rolling bearing device using the grindstone.

  In order to solve the above problems, the grindstone of the present invention is characterized in that a plurality of substantially arc-shaped long grooves extending in the circumferential direction are provided on the grinding surface so as to be spaced apart from each other on a substantially concentric circle.

  According to the grindstone of the present invention, a plurality of substantially arc-shaped long grooves extending in the circumferential direction are provided on the concentric circles of the grinding surface so as to be separated from each other. Even if a projecting object such as a shaft is projected, the projecting object is accommodated in the long groove, and the grindstone is simply swung in the circumferential direction while the grinding surface of the grindstone and the surface to be ground are in close contact with each other. The substantially whole surface to be ground can be ground. That is, since the protrusion that interferes with the grinding operation is accommodated in the arc-shaped long groove of the grindstone, the grindstone is swung, and the grindstone is relatively moved in the long groove. However, the surface to be ground can be easily ground and the flatness of the surface to be ground can be improved.

  Moreover, the grindstone of one Embodiment is provided with the coolant groove | channel connected to each of said some long groove.

  According to the grindstone of the above embodiment, since the coolant groove communicating with each of the plurality of long grooves is provided, the frictional heat generated during the grinding of the surface to be ground of the workpiece by the coolant flowing through the coolant groove. In addition, the grinding waste generated during grinding can be accommodated in the long groove via the coolant groove, and even if the grinding waste accumulates excessively in the long groove, It can be discharged to the outside through the groove.

  Moreover, the grindstone of one embodiment is characterized in that the coolant groove communicates with each of the plurality of long grooves from the inner side and the outer side in the radial direction.

  According to the grindstone of the above embodiment, the coolant groove communicates with each of the plurality of long grooves from the inside and the outside in the radial direction. Can be removed.

Moreover, the processing method of the rolling bearing device for wheels of this invention is as follows:
A wheel rolling bearing device including an outer ring, an inner ring, and a plurality of rolling elements, wherein the outer ring or the inner ring includes a brake disk mounting flange having a brake disk mounting surface for directly or indirectly mounting a brake disk. A method of processing a rolling bearing device for a wheel to be processed,
A plurality of shafts are passed through the substantially concentric holes of the brake disk mounting flange so as to protrude toward the brake disk mounting surface side, and a head is seated and fixed on the surface opposite to the brake disk mounting surface. A wheel rolling bearing device preparation step for preparing a wheel rolling bearing device having a bolt; and
A flange mounting step for mounting the brake disk mounting flange in a circumferential direction in a non-rotatable manner at a predetermined position;
A state in which the long groove of the grindstone according to claim 1 is externally fitted to the shaft portion of the bolt protruding to the brake disc mounting surface side so that the brake disc mounting surface and the grinding surface of the grindstone are in contact with each other. And the flange surface grinding step of grinding the brake disc mounting surface by swinging the grinding wheel in the circumferential direction.

  The brake disc may be directly attached to the brake disc attachment surface or indirectly attached via another member.

  In addition, during grinding of the brake disk mounting surface, the outer ring or the inner ring provided with the brake disk mounting flange may be made non-rotatable at least in the circumferential direction. At least one of the directions may be immovable.

  According to the processing method of the rolling bearing device for a wheel of the invention, the shaft portion of the bolt is fitted into the long groove of the grinding wheel of the invention, Since the grinding wheel is rocked in the circumferential direction in contact with the grinding surface of the grinding wheel to grind the brake disk mounting surface, there is no long groove on the substantially concentric circle of the grinding surface of the grinding stone. The brake disc mounting surface portion where no bolt is present on the substantially concentric circle where the bolt is present on the brake disc mounting surface can be ground. Therefore, it is possible to easily grind almost the entire surface of the brake disk mounting surface only by swinging the grindstone in the circumferential direction, and the flatness of the brake disk mounting surface can be improved without man-hours. .

  Further, a method of processing a rolling bearing device for a wheel according to an embodiment includes a shaft extending from the inner ring or the outer ring not having the brake disk mounting flange toward the outer ring or the inner ring having the brake disk mounting flange. A flange surface grinding step is performed while rotating the inner ring or the outer ring without the brake disk mounting flange in the circumferential direction in a state where a load is applied in the direction.

  According to the method of processing a rolling bearing device for a wheel of the above embodiment, a load is applied to the inner ring or the outer ring not provided with the brake disk mounting flange so that a load is applied to the brake disk mounting flange, and Since the flange surface grinding step is performed in a state where the inner ring or the outer ring is rotated, it is possible to prevent a gap from being generated between the inner and outer rings of the wheel rolling bearing device and the ball due to the load. Thus, the brake disk mounting surface can be ground with no gap between the inner and outer rings and the balls. From this, in a state where there is no gap between the inner and outer rings and the ball, that is, in a state where the outer ring and the inner ring are always positioned with respect to each other via the rolling elements, the inner ring or the outer ring is rotated to Since the brake disc mounting surface is ground, the brake disc mounting surface can be ground in a state where the central axis of the wheel rolling bearing device is perpendicular to the brake disc mounting surface. Therefore, the perpendicularity of the center axis of the wheel rolling bearing device with respect to the brake disk mounting surface can be made excellent.

  According to the grindstone of the present invention, a plurality of substantially arc-shaped long grooves extending in the circumferential direction are provided on the concentric circles of the grinding surface so as to be separated from each other. Even if a protrusion such as a shaft protrudes, the protrusion is accommodated in the long groove, and the grindstone is rocked in the circumferential direction in a state where the grinding surface of the grindstone and the surface to be ground of the member to be ground are in close contact with each other. The surface to be ground can be ground by moving. Therefore, the entire surface to be ground on which the protrusion protrudes can be easily ground, and the flatness of the surface to be ground can be improved without man-hours.

  Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.

  FIG. 1 is a view showing a wheel rolling bearing device 1 processed by the method for processing a wheel rolling bearing device according to an embodiment of the present invention.

  The wheel rolling bearing device 1 includes an inner ring 2, an outer ring 3, two rows of raceway grooves provided on the outer peripheral surface of the inner ring 2, and two rows of raceway grooves provided on the inner peripheral surface of the outer ring 3. And a plurality of balls 4 as an example of the rolling elements arranged in the.

  The inner ring 2 has a disc-shaped brake disk mounting flange 5 that extends in the radial direction to which a brake disk (not shown) is directly or indirectly mounted at one end in the axial direction. A plurality of bolt through holes are formed on a concentric circle centered about the approximate center of the brake disk mounting flange 5, and the plurality of bolts 10 have their shaft portions arranged in the axial direction of the wheel rolling bearing device 1. It is inserted and fixed in this bolt through hole in a state facing outward.

  On the other hand, the outer ring 3 has a disc-like body mounting flange 8 that extends in the radial direction at one end in the axial direction. A plurality of bolt through-holes 9 for inserting bolts for attaching the vehicle body mounting flange 8 to the vehicle body are formed on a concentric circle centered on the substantially center of the disk-shaped vehicle body mounting flange 8.

  A grindstone 15 according to an embodiment of the present invention is disposed on the lower side in the vertical direction indicated by the arrow A of the wheel rolling bearing device 1. The grindstone 15 is attached to the upper surface of a rocking shaft 37 whose lower surface is arranged vertically downward, and the rocking shaft 37 is around its central axis 62, that is, in the circumferential direction indicated by the arrow C in FIG. Is swung in the circumferential direction indicated by arrow C. In the wheel rolling bearing device 1, the shaft portion of the bolt 10, which is a protrusion passing through the brake disk mounting flange 5, is fitted into a long groove 20 formed in the grinding surface 19 of the grindstone 15 to vertically The brake disk mounting surface 11 of the brake disk mounting flange 5 directed downward in the direction is placed on the grindstone 15 in a state where the brake disk mounting surface 11 is in contact with the grinding surface 19 which is the upper surface of the grindstone 15. Moreover, in the processing method of the wheel rolling bearing device of this embodiment, as shown in the partially enlarged view near the grinding surface 19 in FIG. 2, the grinding surface of the grindstone 15 is larger than the radial dimension of the brake disk mounting surface 11. The dimension of 19 in the radial direction is larger, and the grindstone 15 can grind all the inner and outer parts in the radial direction than the bolt 10 of the brake disk mounting surface 11.

  A work guide 30 that is not rotatable in the circumferential direction is disposed outside the brake disk mounting flange 5 in the radial direction. The same number of rotation stoppers 38 as the bolts 10 are fixed to the upper surface of the work guide 30 so as not to rotate in the circumferential direction. The rotation stopper 38 locks the head portion of the bolt 10, and the brake disk mounting flange 5 is in a state where the shaft portion of the bolt 10 and the peripheral surface of the long groove 20 of the grindstone 17 are not in contact with each other. The guide 30 is in a state where it cannot move in the radial direction and cannot rotate in the circumferential direction.

  On the other hand, a load applying device 40 is disposed above the wheel rolling bearing device 1 in the vertical direction. The load applying device 40 includes a main body portion 41 and a base portion 42 connected to the main body portion 41, is rotatable around a central axis 60 of the main body portion 41 indicated by an arrow B in FIG. The structure is movable. The load applying device 40 is placed on the wheel rolling bearing device 1 in a state in which the annular end surface of the base portion 42 is in contact with the upper flange surface of the vehicle body mounting flange 8 of the outer ring 3. Yes.

  FIG. 3 shows the vehicle body mounting flange 8 of the outer ring 2 and the brake of the inner ring 2 when the wheel rolling bearing device 1 is moved downward in the vertical direction indicated by the arrow D and is in contact with the grindstone 15. It is a figure which shows the disk mounting flange 5 and the grindstone 15. FIG.

  As shown in FIG. 3, the long grooves 20 of the grindstone 15 have a substantially arc shape, and are equidistant from each other on a substantially concentric circle centered on a substantially center P of a hollow disc-shaped grinding surface 19. Five are formed in a separated state. Further, the edge shape of both ends in the circumferential direction of the five long grooves 20 is a semicircular shape substantially corresponding to the shaft portion of the bolt 10. The grinding surface 19 of the grindstone 15 is formed with a coolant groove 45 communicating with each of the five long grooves 20 from the inner side and the outer side in the radial direction. The coolant groove 45 includes two grooves communicating from the radially inner portion to each long groove 20 and one groove extending from each long groove 20 to the radially outer portion. During the grinding of the brake disk mounting surface 11, the coolant flows into the coolant groove 45 from the two radially inner grooves to the one radially outer groove via the long groove 20. The frictional heat generated between the brake disk mounting surface 11 and the grinding surface 19 of the grindstone 15 is dissipated, and the grinding generated between the brake disk mounting surface 11 and the grinding surface 19 of the grinding wheel 15 is performed. Scrap is to be removed.

  FIG. 4 is a diagram illustrating the position of the shaft portion of the bolt 10 in the long groove 20 in the initial state before the grindstone 15 is swung.

  As shown in FIG. 4, in the initial state before the grindstone 15 swings, the bolt 10 is externally fitted to the long groove 20 so that the shaft portion is located at the center in the circumferential direction of the long groove 20. As shown in FIG. 4, the diameter of the shaft portion of the bolt 10 is smaller than the radial width of the long groove 20, and the side surface of the shaft portion of the bolt 10 and the circumferential edge of the long groove 20. A clearance gap 50 is provided between them. In this way, the shaft portion of the bolt 10 and the circumferential edge of the long groove 20 are prevented from contacting during grinding of the brake disk mounting surface 11. An arrow E indicates the rocking width of the grindstone 15. The swing width is set to be slightly smaller than the width between both ends of the long groove 20 in the circumferential direction. During grinding, the edge of the shaft portion of the bolt 10 and the end portion of the long groove 20 in the circumferential direction is set. And are not in contact.

  In the above configuration, as shown in FIG. 1, the load applying device 20 located above the wheel rolling bearing device 1 is moved in the vertical direction indicated by the arrow A in the axial direction by the arrow B while being moved in the axial direction. The outer ring is rotated while rotating in the circumferential direction shown in FIG. 1 to apply a predetermined load to the outer ring 3 of the wheel rolling bearing device 1 from above the wheel rolling bearing device 1 and press the brake disk mounting surface 11 against the grindstone 15 with a predetermined pressure. 3 is rotated in the direction of arrow B, while the swinging shaft 37 positioned below the wheel rolling bearing device 1 is swung in the circumferential direction indicated by arrow C with a swinging width 37 indicated by arrow E in FIG. Thus, the brake disc mounting surface 11 that is in contact with the grindstone 15 that is rocking in the same circumferential direction as the rocking shaft 37 is ground.

  According to the grindstone 15 of the above embodiment, five substantially arc-shaped long grooves 20 extending in the circumferential direction are provided on the concentric circles of the grinding surface 19 in a state of being separated from each other. As described above, even if the shaft portion of the bolt 10 protrudes from the brake disc mounting surface 11, the shaft portion is accommodated in the long groove 20, and the grinding surface 19 of the grindstone 15 and the brake disc mounting surface 11 can be brought into close contact with each other. it can. In this state, the brake disk mounting surface 11 can be ground by swinging the grindstone 15 in the circumferential direction. Therefore, in the portion 33 (see FIG. 3) where the long groove 20 does not exist on the substantially concentric circle of the grinding surface 19 of the grindstone 15, the portion of the grinding surface 19 on the substantially concentric circle of the brake disk mounting surface 11 that is difficult to grind. Corresponding and the portion 39 (see FIG. 3) excluding the shaft portion of the bolt 10 can be easily ground, so that the substantially entire surface of the brake disk mounting surface 11 from which the shaft portion of the bolt 10 protrudes can be easily ground. Thus, the flatness of the brake disk mounting surface 11 can be improved without man-hours.

  Further, according to the grindstone 15 of the above-described embodiment, the coolant grooves 45 communicating with each of the five long grooves 20 are provided. Therefore, the coolant flowing through the coolant grooves 45 is generated during grinding of the brake disk mounting surface 11. It is possible to absorb the frictional heat that is generated, and the grinding waste generated during the grinding can be accommodated in the long groove through the coolant groove 45. It can be discharged to the outside through the groove 45.

  Moreover, according to the grindstone 15 of the above embodiment, the coolant groove 45 communicates with each of the five long grooves 20 from the inner side and the outer side in the radial direction, and thus is easily accommodated in the long groove 20 during grinding. Grinding waste can be efficiently removed.

  Further, according to the processing method of the wheel rolling bearing device 1 using the grindstone 15, a load is applied to the outer ring 3 not provided with the brake disk mounting flange 5 toward the brake disk mounting flange 5, and the outer ring. 3, the brake disc mounting surface 11 that is non-rotatably mounted in the circumferential direction is brought into contact with the grindstone 15 that is swinging in the circumferential direction to grind the brake disc mounting surface 11. The load can prevent a gap between the inner and outer rings 2 and 3 and the ball 4 of the rolling bearing device 1 for a wheel, and there is no gap between the inner and outer rings 2 and 3 and the ball 4. The brake disc mounting surface 11 can be ground in the state. Therefore, the outer ring 3 is rotated in a state where there is no gap between the inner and outer rings 2 and 3 and the ball 4, that is, the inner ring 2 and the outer ring 3 are always positioned with respect to each other via the ball 4. Since the brake disc mounting surface 11 is ground, the brake disc mounting surface 11 can be ground in a state where the center shaft 61 of the wheel rolling bearing device 1 is perpendicular to the brake disc mounting surface 11. Therefore, the perpendicularity of the central shaft 61 of the wheel rolling bearing device 1 with respect to the brake disk mounting surface 11 can be made excellent.

  Further, according to the processing method of the wheel rolling bearing device 1 using the grindstone 15, the brake disk mounting of the vehicle body mounting flange 8 is mounted on the vehicle body mounting flange 8 of the outer ring 3 not provided with the brake disk mounting flange 5. Since the load is applied to the brake disc mounting flange 5 from the flange surface on the opposite side to the vehicle flange 5 side, the vehicle body mounting flange 8 for fixing the wheel rolling bearing device 1 to the vehicle body is utilized well. Thus, a load can be easily applied to the brake disk mounting flange 5 at a low cost.

  Further, according to the processing method of the wheel rolling bearing device of the above embodiment, the brake disk mounting flange 5 is brought into a state in which it cannot move in the radial direction and cannot rotate in the circumferential direction with respect to the work guide 30. Since the mounting surface 11 is ground, the wheel rolling bearing device 1 can be prevented from wobbling (moving) during the grinding.

  In the grindstone 15 of the above-described embodiment, the long grooves 20 of the grindstone 15 are spaced apart from each other at regular intervals on a substantially concentric circle centered on the substantial center P of the hollow disk-shaped grinding surface 19. In the grindstone of the present invention, the long grooves of the grindstone are other than five in a state of being spaced apart from each other at regular intervals on a substantially concentric circle centered on the substantial center of the hollow disc-shaped grinding surface. A plurality of these may be formed. Further, in the grindstone of the present invention, a plurality of the long grooves 20 of the grindstone 15 may be formed at substantially non-equal intervals on a substantially concentric circle centered on the substantial center of the hollow disk-shaped grinding surface.

  In the grindstone 15 of the above embodiment, the coolant groove 45 extending in the radial direction is formed. However, in the grindstone of the present invention, a coolant groove extending in the circumferential direction may be formed. In the grindstone of the present invention, the coolant groove need not be formed.

  Moreover, in the processing method of the wheel rolling bearing device 1 of the above embodiment, the shaft portion of the bolt 10 is changed to the long groove 20 of the grindstone 15 in the flange mounting step and the flange surface grinding step after the wheel rolling bearing device preparation step. The brake disk mounting surface 11 cannot be moved in the radial direction with respect to the work guide 30 and cannot be rotated in the circumferential direction with the brake disk mounting surface 11 and the grinding surface 19 of the grindstone 15 in contact with each other. In this state, the grindstone 15 was swung in the circumferential direction to grind the brake disk mounting surface 11. However, in the wheel rolling bearing device processing method of the present invention, after the wheel rolling bearing device preparation step, Attaching the brake disk mounting surface to the support member so that it cannot rotate in the circumferential direction performs the flange mounting process, and then the brake disk mounting where the shaft of the bolt protrudes The grindstone is moved closer to the wheel, and the shaft of the bolt is externally fitted into the long groove of the grindstone. The flange grinding process may be performed by moving.

  Moreover, in the processing method of the wheel rolling bearing device 1 of the above embodiment, the present invention is applied to the wheel rolling bearing device 1 having a double row raceway groove on the outer peripheral surface of the inner ring 2 and the inner peripheral surface of the outer ring 3. However, the present invention may be applied to a rolling bearing device for a wheel having a single row raceway groove on the outer peripheral surface of the inner ring and the inner peripheral surface of the outer ring. Moreover, although this invention was applied to the rolling bearing device 1 for wheels whose rolling elements are the balls 4, you may apply this invention to the rolling bearing device for wheels whose rolling elements are rollers.

  Moreover, in the processing method of the wheel rolling bearing device 1 of the above embodiment, the present invention is applied to the wheel rolling bearing device 1 having the brake disk mounting surface 11 to which the brake disk is mounted directly or indirectly on the inner ring 2. However, you may apply this invention to the rolling bearing apparatus for wheels which has a brake disc attachment surface which attaches a brake disc directly or indirectly to an outer ring | wheel.

Moreover, in the processing method of the rolling bearing device 1 for a wheel according to the above embodiment, grinding was performed using the load applying device 40 while pressurizing the outer ring 3 and rotating it in the arrow B direction. In the processing method of the rolling bearing device, the brake disk mounting surface may be ground using only the weight of the wheel rolling bearing device without using the load applying device.

It is sectional drawing which shows the rolling bearing device for wheels currently processed with the processing method of the rolling bearing device for wheels of one Embodiment of this invention. It is the elements on larger scale near the grinding surface of the grindstone of FIG. It is a figure which shows the flange for vehicle body attachment, the flange for brake disc attachment, and a grindstone in the middle of making the rolling bearing apparatus for wheels contact the grindstone. It is a figure which shows the position of the axial part of the volt | bolt in the long groove of the initial state before rocking a grindstone.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rolling bearing apparatus for wheels 2 Inner ring 3 Outer ring 4 Ball 5 Brake disk mounting flange 8 Car body mounting flange 10 Bolt 11 Brake disk mounting surface 15 Grinding wheel 19 Grinding surface 20 Long groove 45 Coolant groove P Substantially center of grinding surface

Claims (5)

A grindstone characterized in that a plurality of substantially arc-shaped long grooves extending in the circumferential direction are provided on a grinding surface so as to be spaced apart from each other on a substantially concentric circle. In the grindstone according to claim 1,
A grindstone comprising a coolant groove communicating with each of the plurality of long grooves. In the grindstone according to claim 2,
The coolant groove communicates with each of the plurality of long grooves from the inside and outside in the radial direction. A wheel rolling bearing device including an outer ring, an inner ring, and a plurality of rolling elements, wherein the outer ring or the inner ring includes a brake disk mounting flange having a brake disk mounting surface for directly or indirectly mounting a brake disk. A method of processing a rolling bearing device for a wheel to be processed,
A plurality of shafts are passed through the substantially concentric holes of the brake disk mounting flange so as to protrude toward the brake disk mounting surface side, and a head is seated and fixed on the surface opposite to the brake disk mounting surface. A wheel rolling bearing device preparation step for preparing a wheel rolling bearing device having a bolt; and
A flange mounting step for mounting the brake disk mounting flange in a circumferential direction in a non-rotatable manner at a predetermined position;
A state in which the long groove of the grindstone according to claim 1 is externally fitted to the shaft portion of the bolt protruding to the brake disc mounting surface side so that the brake disc mounting surface and the grinding surface of the grindstone are in contact with each other. A method for processing a rolling bearing device for a wheel, comprising: a flange surface grinding step of rocking the grindstone in a circumferential direction to grind the brake disk mounting surface. In the processing method of the rolling bearing device for wheels according to claim 4,
In the state where an axial load is applied from the inner ring or the outer ring not having the brake disk mounting flange to the outer ring or the inner ring having the brake disk mounting flange, the brake disk mounting flange is A method of processing a rolling bearing device for a wheel, wherein a flange surface grinding step is performed while rotating the inner ring or the outer ring not provided in the circumferential direction.

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