JP5254702B2 - Bearing grinding jig - Google Patents

Description

The present invention fixes an angular ball bearing, a rolling bearing, a four-point contact ball bearing or the like having a plurality of rolling elements interposed between an outer ring and an inner ring to a bearing clamp flange, and an annular plane and an inner ring of the outer ring of the bearing. The present invention relates to a bearing grinding jig used for flattening by simultaneously grinding with a grinding wheel rotating on an annular plane.

Many methods for processing bearings have been proposed. For example, after heat-treating the outer ring material and performing surface hardening, both sides of the ring of the outer ring are width ground, then the rolling surface of the outer ring is centerless ground, and the inner seal groove of the outer ring is machined by quenching steel cutting. . Thereafter, the outer race is formed by superfinish polishing the rolling surface. Also, after heat treating the inner ring material and performing surface hardening, both sides of the ring of the inner ring are width ground, then the rolling surface of the inner ring is centerless ground, and the outer seal groove of the inner ring is machined by quenching steel cutting. . Thereafter, the inner race is formed by superfinish polishing the rolling surface. A rolling element is inserted into the raceway space between the inner ring and the outer ring, and then an annular seal is fitted into the seal groove of the inner ring to close the gap between the outer ring and the inner ring (see, for example, Patent Document 1).

An annular material with an outer diameter of the outer diameter of the bearing outer ring and the allowance, an inner diameter of the inner ring of the bearing minus the allowance, and a width of the bearing width plus the allowance. An annular material manufacturing process to be manufactured, a cutting process of cutting the annular material into a plurality of raceway ring materials by laser processing, and one of the cut raceway ring materials as an outer ring raceway, and the other one Is the inner ring raceway, and both the outer ring raceway and the inner ring raceway are simultaneously subjected to double-end surface grinding on the axial end faces of the outer ring raceway and the inner ring raceway, and the axial end faces of the outer ring raceway and the inner ring raceway are magnetized by a magnet chuck. However, a bearing race manufacturing method has been proposed which includes a turning process in which the outer diameter surface, the inner diameter surface and the groove are subjected to a hard turning process with one chuck (see, for example, Patent Document 2).

Further, a method of manufacturing a bearing ring of a combined bearing in which a plurality of bearing rings are combined, wherein the ring-shaped member is longer by a predetermined dimension than the axial length when the plurality of bearing rings are combined in the axial direction. After the required processing is performed on each race, the processing accuracy is inspected, and then the wire is cut while rotating the ring member to divide the ring member into a plurality of rings. A method of manufacturing a bearing ring for a combined bearing is also proposed, characterized in that a finished race ring is obtained by grinding the cut surface of the ring itself after machining and providing circumferential grooves on the inner diameter side and / or outer diameter side. (For example, see Patent Document 3).

Furthermore, a wheel for processing a rolling bearing device for a wheel comprising an outer ring, an inner ring, and a plurality of rolling elements, wherein the outer ring or the inner ring has a brake disk mounting flange for directly or indirectly mounting a brake disk. A rolling bearing device machining method comprising: assembling the outer ring, the inner ring, and the plurality of rolling elements; and then, setting the outer ring or the inner ring having the brake disk mounting flange in a circumferential direction at a predetermined position. While mounting non-rotatably, the inner ring or the outer ring not provided with the brake disk mounting flange applies a load toward the brake disk mounting flange and the inner ring or the outer ring without the brake disk mounting flange. The brake disc mounting flange brake while the outer ring is rotated. There has also been proposed a processing method for a wheel rolling bearing device for grinding a brake disk mounting surface by bringing a brake disk mounting surface to which a disk is mounted directly or indirectly into contact with a grindstone of a rotating grinding device. (For example, see Patent Document 4).

JP-A-6-246546 JP 2004-92726 A JP 2005-48881 A FIG. 3 of JP-A-2006-175551

When the combined bearing 200 having the structure disclosed in FIG. 9A of Patent Document 3 is used as a spindle bearing of a precision machine tool, as shown in FIG. A combined bearing 200 in which the annular bottom plane 201b of the ball bearing 201 hangs a preload on the annular upper plane 202a of the lower ball bearing 202, and the peeling force between the upper bearing bottom surface and the lower bearing upper surface is about 200 kg (plus or minus 40 kg). Used for bearings for spindles of machine tools.

Therefore, in the case where a bearing obtained by performing both-side surface grinding on the annular flat surface of the outer ring or the annular flat surface of the inner ring using the flat grindstone described in Patent Document 1, Patent Document 2, and Patent Document 3, the outer ring Or the smoothness of the annular flat surface of the inner ring is as coarse as 1 to 2 μm, which is less than the peel force (about 160 kg).

The present inventors presume that the smoothness of the annular plane of the bearing ring can be improved to 0.2 to 0.5 μm by using a grinding wheel (including a molded grinding wheel). A bearing grinding jig that can apply sufficient back pressure to the back of the bearing has been developed.

The invention of claim 1 is a bearing grinding jig (1) provided on a base of a grinding apparatus, and the bearing grinding jig (1) is a top of a cylindrical jig housing material (3) . a guide ring for guiding the bearing (w) which is an object to be abrasive to the inside (4), the clamp cylinder to Yurushime the inner wall of the inner ring (w _i) of the bearing (26) and the upper piston (17) shaft ( 22) and the clamping nut (24) from Na Ru clamping cylinder mechanism (17,22,24,26), the guide ring (4) lower center provided Rutotomoni outer periphery retainer plate (21) below the piston (19 ) and spline shaft connecting the cylinder flange (11) (10), said spline shaft (10) mounted al clamps flange upward (8), the pressure chamber having a built-in said clamp flange (8) The upper piston (17) provided below the clamp flange (8) in the annular annular weir (6a) wall , the upper part of which can contact the bottom of the member (6) and the clamp cylinder (26) the example Bei the lower piston (19) which is provided at a position, the clamping cylinder (26) the bottom of the pressurized air supply pipe (12) clamping flange lifting mechanism for moving up and down by the supplied compressed air into the (8 and 12,17,19), rotary drive means for rotating the hollow rotating shaft to provide a rotation function (10a) on the clamping flange (8) (11), a bearing grinding jig including a city (1) The shaft center of the spline shaft (10), the shaft center of the hollow rotary shaft (10a), the shaft center of the guide ring (4) and the shaft center of the clamp flange (8) are on the same axis. Toss , There is provided a bearing grinding jig (1).

According to a second aspect of the invention, the clamping flange elevating mechanism (8,12,17,19) has a guide ring (4 for guiding bearings a (w) inside the top portion of the circular cylindrical jig housing member (3) ) and the guide ring (center and bottom with a ring annular fixed weir (6a) at the top which is provided rotatably so as to face the receiving plate (3b) inner wall provided annularly inwardly at the bottom of the 4) laying a pressure chamber member (6) having a wall with a cylindrical space, an annular mounting plate to the bottom of the said ring annular anchoring dam of the pressure chamber member (6) (6a) (7), this A clamp flange (8) suspended from the annular mounting plate (7) in the bottom cylindrical space so as to be movable vertically and horizontally, and a spline shaft (10 ) provided at the center of the cylindrical jig housing material (3) Cylinder flange (11 ) connected to the outer periphery of the cylinder ) and this cylinder Over flange (11) of pressurized air provided in the center of the spout and (12a), said spline shaft (10) wherein is installed in the shaft space inside the cylinder flange (11) blows pressurized air to the bottom pressurized air supply the tube (12), coils spring (14) and the cylinder flange (11) while accommodating the spring case (16) to the pressure chamber member (6) in which a built-in word ear (15) fixed to the upper, It said outer wall and pressurized air blown from the between the inner wall of the wall pressurized air jets (12a) having a bottom cylindrical space portion of the pressure chamber member (6) of the spring case (16) pressurized leads to the pressure chamber of the chamber member (6), the guides on the clamping flange (8) the bottom, has a function of raising the upper side piston (17), also, the upper shaft of the piston (17) (22) Top head Said upper piston (17) lower periphery to the bearing inner ring _(w i) forward retractable clamping cylinder via an adjusting collar (25) towards the side wall of provided with a clamping nut (24) via a thrust collar (23) (26) is provided, Wa ear (15) the lower end of the said spring case (16), said spline shaft (10) set on the head shading, the pressure chamber member (6 upper end of the follower ear (15) ) clamping flange (8) provided in the by the central through is fixed to the upper piston (17) bottom center, the pressurized air supply pipe (12) the clamp flange has been pressurized air fed into the ( 8) wherein by introducing the bottom corrects the tilt occurring in the clamping flange (8) are suspended clamping flange (8) wheels annular anchoring dam of the pressure chamber member (6) of (6a) Kamitaira The plane-parallel keeping to the bottom surface of the clamping cylinder (26), also, the coil spring (14) is Ri biasing means der clamping cylinder (26) that urges the clamp flange (8) bottom, front wherein the by pivoting the serial clamping nut (24) forms a Yurushime actuation outer peripheral wall is moved away from contact with or the inner wall to the inner wall of the inner ring of bearings (w _i) of the clamping cylinder (26), wherein Item 1. A bearing grinding jig (1) according to Item 1 is provided.

The bearing grinding jig of the present invention is configured by fitting an annular rubber ring for preventing foreign matter intrusion into a gap between an outer ring and an inner ring of a bearing in which a plurality of rolling elements are interposed between the outer ring and the inner ring. Then, the clamp flange mounted on the rotating shaft is slightly raised and brought into contact with the bottom surface of the clamp cylinder, and the inner peripheral wall of the inner ring of the bearing is fastened and fixed by the clamp cylinder mechanism. Then, it can be flattened by simultaneously grinding the peripheral surface of the grinding wheel rotating into the annular plane of the outer ring of the bearing and the annular plane of the inner ring as the material to be ground. The method of grinding a bearing using a bearing grinding jig and a grinding wheel according to the present invention provides a grinding plane with better smoothness than grinding with a conventional flat grindstone.

The bearing grinding jig of the present invention is easy to fix the bearing.

Hereinafter, the present invention will be described in more detail with reference to the drawings. FIG. 1 is a cross-sectional view of a bearing grinding jig , and the cross section of the spline shaft 10 is drawn such that a portion of the spline shaft 10 is omitted and a jet port 12a for pressurized air can be seen. 2 is a plan view of the guide ring, FIG . 3 is a plan view of the annular mounting plate, and FIG. 4 is a sectional view of the combination bearing.

In the bearing grinding jig 1 shown in FIG. 1, the bearing grinding jig 1 is provided on the base of a grinding apparatus. Reference numeral 2 denotes a waterproof cover which prevents the grinding fluid from adhering to the air bearing 9. At the top of the cylindrical jig housing material 3 including the jig base 3a, a guide ring 4 for guiding a bearing w, which is a material to be ground, to the inside is provided. As shown in FIG. 2, the guide ring 4 has a cylindrical shape with an outer diameter of 224 mm and an inner diameter of 184 mm, and an arc-shaped protrusion 4a having a width of about 1 mm is provided at the bottom. The circular surface is provided with an arc-shaped shallow groove 4b having a depth of 1 mm, and there are eight bolt locking holes 4c from the circular surface toward the bottom, and bolt locking from the bottom toward the circular surface. Eight holes 4d are provided.

The guide ring 4 is fixed to the jig base 3a by a locking bolt 5 via a receiving plate 3b provided in an annular shape at the lower part of the guide ring.

A pressurizing chamber member 6 having walls 6b and 6c each having a ring-shaped fixed weir 6a at the upper part provided rotatably and facing the inner wall of the receiving plate 3b and having a cylindrical space part at the center and the bottom, An annular mounting plate 7 is laid on the bottom of the upper ring annular fixed weir 6a of the pressure chamber member 6, and a clamp flange is suspended from the annular mounting plate 7 so as to be movable vertically and horizontally in a wall 6c having a bottom cylindrical space portion. 8 is provided. As shown in FIG. 3, the center of the annular mounting plate 7 is provided with a through hole Wa ear 15 which will be described later.

This is a cylinder flange 11 connected to the outer periphery of a spline shaft 10 provided with the same shaft center on the extension of the shaft center of the hollow rotary shaft 10a mounted on the air bearing 9 at the center of the cylindrical jig housing material 3. Te a cylinder flange 11 having a pressurized air ejection port 12a at its bottom center, is installed in the spline shaft 10 inside the space, and the cylinder flange 11 blows pressurized air to the bottom pressurized air supply pipe 12, the hollow rotary A rotation driving means 11 (a driving motor and a toothed driving belt, and a pulley 11a (not shown)) of the shaft 10a are provided. The polyamide resin hollow pressurized air supply pipe 12 is inserted into the hollow portion of the hollow rotary shaft 10 a via the rotary joint 13. A pressure of pressurized air of 0.2 to 0.5 PKa is sufficient.

Accommodating the spring case 16 having a built-in coil spring 14 and the follower ear 15 on the pressure chamber member 6 fixed to the cylinder flange 11 top, bottom cylindrical space of the outer wall 16a pressurizing chamber member 6 of the spring case 16 The pressure chamber member 6 that guides the pressure air blown from the pressurized air outlet 12a between the inner walls of the wall 6c having a portion to the bottom of the clamp flange 8 provided in the bottom cylindrical space portion of the pressure chamber member 6. Provide. The word ear 15, the spline shaft 10 head is provided with a spline axis extending on, the upper end of the follower ear 15 above the piston 17 bottom clamp flange 8 provided in the pressure chamber 6 to the central through is fixed to the center, the lower end of the word ear 15 is fixed to Kakaritomebashira 18 placed through the upper portion of the spline shaft 10. Kakaritomebashira 18, are without any role of the suspended load of the word hate 15. The axis of the guide ring 4, the axis of the clamp flange 8, the axis of the spline shaft 10, and the axis of the hollow rotary shaft 10a are on the same axis.

The word ear 15, the upper portion of the pressure chamber member 6 that the by pressurized air introduced into the clamping flange 8 bottom (pressure) by correcting the slight tilt occurring in the clamping flange 8 suspended clamping flange 8 It has a function of keeping the upper flat surface of the ring-shaped fixed weir 6a parallel to the bottom surface of the clamp cylinder 26 described later. The coil spring 14 urges the bottom of the clamp flange 8 and transmits this urging force to the bottom of the clamp cylinder 26.

The upper piston 17 is provided upward from the bottom of the upper ring annular fixed weir 6 a of the pressurizing chamber member 6, and the lower piston 19 is provided around the spline shaft 10 located in the space portion below the cylinder flange 11. A retainer plate 21 provided at the lower portion of the cylinder flange 11 is provided in the cylinder case 20 so that the upper surface of the lower piston 19 is fixed to the inner wall of the cylinder case 20 by a diaphragm 21 so that it can be slightly moved up and down. Yes.

A clamp nut 24 is provided on the upper end of the shaft 22 of the upper piston 17 via a thrust collar 23, and a clamp cylinder which can be moved forward and backward through an adjustment collar 25 on the outer periphery of the lower end of the upper piston 17 toward the bearing inner ring side wall. 26 is provided. The outer circumferential wall of the clamping cylinder 26 by a clamping nut 23 to pivot clockwise direction to abut proceeds to the inner wall side of the inner ring w _i of the bearing w is to be ground material to fix the inner ring w _i of the bearing. Contact the inner wall. Outer peripheral wall of the clamping cylinder 26 by pivoting the clamping nut 23 in the opposite clockwise direction to retract from the inner wall of the inner ring w _i of the bearing w is the abrasive, bearing w is the abrasive is released from the fixed The In other words, the clamp nut 23 is a swiveling tool that performs a loose tightening operation that presses the clamp cylinder 26 against the inner ring inner wall of the bearing or moves away from the inner ring inner wall via the adjustment collar 25.

The tip of the position confirmation shaft 27 passes through the wall of the pressurizing chamber member 6 and faces the gap formed by the spring case 16 and the pressurizing chamber member 6. The tip position of the position confirmation shaft 27 suppresses the lateral swing width of the spring case 16.

Next, the process of surface grinding the bearing w using the bearing grinding jig 1 shown in FIG. 1 will be described. In FIG. 1, the grinding wheel 100 is indicated by an imaginary line and is rotated around the grinding wheel shaft 101.

(1) an outer ring w _O and the inner ring w into orbit formed between _i bearings w with interposed a plurality of rolling elements outer ring w _O and the inner ring w _i between the outer ring an annular gap to an annular rubber sealing material w _O and the inner ring It is inserted from the surface of w _{i to} a depth of 0.3 to 1.0 mm so that grinding waste cannot enter the bearing raceway.

(2) The bearing is inserted into the guide ring 4 of the bearing grinding jig 1 with the ground surface of the bearing w of this seal structure facing upward.

(3) the outer peripheral wall of the clamping cylinder 26 is in contact with traveling on an inner wall side of the inner ring w _i of the bearing w is to be ground material to fix the inner ring of the bearing by turning a clamping nut 23 in a clockwise direction.

(4) 0.3 PKa of compressed air led to the pressurized air supply pipe 12 is guided to the bottom of the pressurizing chamber member 6, the clamp flange 8 is slightly raised, and the pressurizing chamber member 6 is placed at the bottom of the clamp cylinder 26. The upper ring annular fixed weir 6a upper part is made to contact.

(5) Around the spline shaft 10 in which the guide ring 4 and the clamp flange 8 have the same axial center as that of the hollow rotating shaft 10 by rotating the hollow rotating shaft 10a at a rotational speed of 8 to 100 min- ¹ by the rotation driving means. Rotate to. Therefore, the bearing fixed to the clamp cylinder 26 also rotates.

(6) The circumferential outer surface of the grinding wheel 100 rotating while being lowered while rotating the grinding wheel shaft 101 of the surface grinding device at 2,000 to 3,000 min ⁻¹ rotation speed contacts the grinding surface of the bearing w. The outer ring w _o and w _{i of the} bearing and the annular plane of the inner ring are finish-ground. A grinding allowance of 0.01 to 0.06 mm is sufficient.

(7) When the grinding of the bearing is completed, the grinding wheel shaft 101 is raised to move the grinding wheel 100 away from the bearing w, and then the grinding wheel 100 is stopped, and then the grinding wheel 100 is moved to the standby position.

(8) The rotation of the hollow rotary shaft 10a is stopped, and then the supply of pressurized air to the pressurizing chamber 6 is stopped.

(9) the outer peripheral wall of the clamping cylinder 26 by pivoting the clamping nut 23 in the opposite clockwise direction is recessed from the inner wall of the inner ring w _i of the bearing w is the abrasive, solving a fixed bearing w.

(10) The bearing w subjected to surface grinding is removed from the bearing grinding jig 1.

In addition, it is preferable that the linear pressure applied to the grinding wheel bearing at the time of grinding is selected such that a pair of ground bearings w and w are stacked and a pressure of 200 kg is used as a combination bearing.

The bearing grinding jig of the present invention is easy to fix the bearing and provides a ground surface with excellent smoothness.

It is sectional drawing of the jig | tool for bearing grinding. It is a top view of a guide ring. It is a top view of an annular mounting plate. It is sectional drawing of a combination bearing.

Explanation of symbols

1 bearing grinding jig 3 cylindrical jig housing member 4 guide ring 6 pressurizing chamber member 8 clamp flange 10 splined shaft 10a hollow rotating shaft 12 compressed air supply pipe 15 follower unpleasant <br/> 16 spring case 23 clamping nut 26 Clamp cylinder 100 Grinding wheel w Bearing (material to be ground)

Claims (2)

A bearing grinding jig provided on the base of the grinding device (1), the bearing grinding jig (1) is a to be ground material top of the cylindrical jig housing member (3) bearing a guide ring (4) for guiding the (w) inside the bearing inner ring _(w i) and the clamp cylinder to Yurushime the inner wall (26) above the piston (17) and the shaft (22) the clamping nut (24 ) ing than the clamp cylinder mechanism (17,22,24,26), the guide ring (4) lower center provided Rutotomoni outer periphery retainer plate (21) below the piston (19) and the cylinder flange (11) spline shaft connecting the (10), said spline shaft (10) mounted al clamps flange upward (8), the pressure chamber member which incorporates the clamp flange (8) (6), said click The upper piston (17) provided at the upper position of the clamp flange (8) and the lower position provided at the lower position in the ring-shaped fixed weir (6a) wall whose upper part can contact the bottom of the ramp cylinder (26) e Bei piston (19), said clamping cylinder (26) the bottom of the pressurized air supply pipe (12) clamping flange lifting mechanism for moving up and down by the supplied compressed air into the (8,12,17,19 ) and rotary drive means for rotating the hollow rotary shaft (10a) which gives a rotation function to said clamping flange (8) (11), a city bearing grinding jig (1) provided with the spline shaft (10 ), The hollow rotating shaft (10a), the guide ring (4), and the clamp flange (8) are on the same axis. jig 1). Clamping flange elevating mechanism (8,12,17,19) comprises a guide ring for guiding bearings a (w) inside the top portion of the circular cylindrical jig housing member (3) (4), said guide ring ( 4) A ring-shaped fixed weir (6a) is provided at the upper part provided rotatably in the lower part facing the inner wall of the receiving plate (3b) provided annularly at the lower part, and has a cylindrical space part at the center and at the bottom. a pressure chamber member (6) having a wall, a bottom annular mounting plate (7) laid on the said wheel annular anchoring dam of the pressure chamber member (6) (6a), from the annular mounting plate (7) A clamp flange (8) suspended from the bottom cylindrical space so as to be movable vertically and horizontally, and an outer periphery of a spline shaft (10) provided at the center of the cylindrical jig housing material (3). Cylinder flange (11 ) and this cylinder flange (11) Of pressurized air provided in the center spout and (12a), said spline shaft (10) wherein is installed in the shaft space inside the cylinder flange (11) blows pressurized air supplying pressurized air pipe to the bottom (12) If, coils spring (14) and the cylinder flange (11) with word built unpleasant (15) the spring case (16) accommodated in the pressure chamber member (6) in and fixed to the upper, the spring case (16 the outer wall and the pressure chamber member (6) a bottom cylindrical the between the inner wall of the wall with a space pressurized air jets (12a) than expelled the pressurized air the pressure chamber member) of ( leads to pressure chamber 6) is guided in the clamping flange (8) the bottom, has a function of raising the upper side piston (17), also on the shaft (22) upper head of the upper piston (17) thrust collar ( Said upper piston provided with a clamping nut (24) via a 3) (17 bearing inner ring at the lower end outer periphery of) _(w i) forward retractable clamping cylinder via an adjusting collar towards the side wall (25) (26) the provided, Wa ear (15) the lower end of the said spring case (16), said spline shaft (10) set on the head shading, the upper end of the follower ear (15) to the pressure chamber member (6) in is the provided clamping flange (8) with a central through fixed to the upper piston (17) bottom center, the pressurized air supplied to the pressurized air supply pipe (12) in the clamping flange (8) the bottom said upper flat surface of the wheel annular anchoring dam of the pressurizing chamber member which hangs a clamp flange (8) to correct the tilt occurring in the clamping flange (8) by introducing (6) (6a) to Kuranpushi Parallel keeping to the bottom surface of Linder (26), also, the coil spring (14) is Ri biasing means der clamping cylinder (26) that urges the clamp flange (8) bottom, front SL clamping nut ( and wherein the forming the Yurushime actuation outer peripheral wall is moved away from contact with or the inner wall to the inner wall of the inner ring of bearings (w _i) of the clamping cylinder (26) by pivoting 24) of claim 1, wherein Bearing grinding jig (1) .

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