CN115638182A - Double-row angular contact ball bearing of silicone oil clutch, processing equipment and processing method - Google Patents

Abstract

The invention relates to the field of bearings, and particularly discloses a double-row angular contact ball bearing of a silicone oil clutch, processing equipment and a processing method. The double-row angular contact ball bearing comprises an inner ring, an outer ring, a rolling body, a retainer and two sealing covers; one sealing cover is an inner sealing cover, the inner sealing cover comprises a rigid framework, and the rigid framework comprises a first section and a second section; an axial sealing layer is arranged on the inner side of the second section, and a main sealing lip is arranged on the inner edge of the second section; the inner side of the outer ring is provided with a press-fitting surface and an outer sealing surface; an inner sealing surface is arranged on the outer side of the inner ring; the first subsection is in interference fit with the press-fitting surface, and the axial sealing layer is in contact with the outer sealing surface; the primary seal lip is in sliding contact with the inner seal surface. The double-row angular contact ball bearing can reliably seal the silicone oil in the silicone oil clutch in a self-locking mode through reasonably arranging the inner sealing cover, so that the normal and stable operation of the silicone oil clutch is ensured.

Description

Double-row angular contact ball bearing of silicone oil clutch, processing equipment and processing method

Technical Field

The invention relates to the field of bearings, in particular to a double-row angular contact ball bearing of a silicone oil clutch, processing equipment and a processing method.

Background

The silicone oil clutch is a clutch which takes silicone oil as a medium and utilizes the shearing viscous force of the silicone oil to transfer torque, is commonly used for a cooling fan of an engine and can play a role in flexibly adjusting the cooling strength of the engine. As shown in fig. 1, the silicon oil clutch generally comprises a shell 01, an oil storage cavity 02 is formed in the shell 01, a valve plate is arranged in the oil storage cavity, external power is transmitted into the shell through a driving shaft during work, and the driving shaft is connected with the shell through a bearing 03.

The silicone oil as a transmission medium has fluidity and risks leakage, so that the silicone oil clutch has high requirements on sealing performance. One of the weak links of the sealing of the silicone oil clutch is the sealing of the bearing, and the sealing difficulty is high because the bearing is a dynamic and static connecting component between the driving shaft and the shell, and the sealing structure of the existing bearing is difficult to realize reliable sealing in the working environment of the silicone oil clutch. The working temperature range of the silicone oil clutch is-40 to 200 ℃, and can be higher than 200 ℃ in short time, which belongs to a high-temperature working condition in the field of sealed bearings, and the sealing effect of a conventional sealed bearing structure is difficult to ensure in the high-temperature state.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a double-row angular contact ball bearing of a silicone oil clutch, processing equipment and a processing method.

In order to solve the technical problems, the technical scheme provided by the invention is as follows: a double-row angular contact ball bearing for a silicone oil clutch comprises an inner ring, an outer ring, a rolling body, a retainer and two sealing covers, wherein the rolling body and the sealing covers are positioned between the inner ring and the outer ring, and the rolling body is positioned between the two sealing covers; two outer channels are arranged on the inner side of the outer ring;

one sealing cover is an inner sealing cover, and the other sealing cover is an outer sealing cover;

the inner sealing cover comprises a rigid framework, the rigid framework comprises a first section extending along the axial direction and a second section extending along the radial direction, and the first section and the second section are arranged in an L shape; an axial sealing layer made of an elastic material is arranged on the inner side of the second section, a main sealing lip made of an elastic material is arranged on the inner edge of the second section, and the main sealing lip is obliquely arranged towards the outer side;

the inner side of the outer ring is provided with a press-fitting surface extending along the axial direction and an outer sealing surface extending along the radial direction; the outer side of the inner ring is provided with an inner sealing surface extending along the axial direction;

the height difference between the press-mounting surface and the bottom of the outer channel in the radial direction is M, and the error of M is not more than +/-0.005 mm;

the first subsection is in interference fit with the press-fitting surface, and the axial sealing layer is in contact with the outer sealing surface; the main seal lip is in sliding contact with the inner seal surface.

In the silicone oil clutch, the inner sealing cover of the double-row angular contact ball bearing is arranged towards the inside of the silicone oil clutch, and correspondingly, the outer sealing cover is arranged towards the outside of the silicone oil clutch. Under the action of the internal pressure of the silicone oil clutch, the inner sealing cover has the tendency of moving towards the direction of the rolling body, the first section of the inner sealing cover realizes the sealing with the press-mounting surface in an interference fit mode and assists in the extrusion sealing of the axial sealing layer and the outer sealing surface, and the sealing between the inner sealing and the outer ring is reliable and stable; the main sealing lip realizes sliding sealing with the inner ring in a self-locking mode, and the larger the internal pressure is, the better the sealing effect is.

In addition, another factor influencing the sealing performance of the bearing is the size and position precision of the groove and the sealing surface on the ferrule, and when the precision is low, the sealing effect of the sealing cover is influenced when the inner ring and the outer ring move relatively. By controlling the position accuracy of the press-fitting surface and the outer channel, the risk of leakage caused by sealing movement can be reduced to a certain extent.

Preferably, a transition groove is arranged between the outer sealing surface and the press mounting surface, and the arrangement of the transition groove not only can better ensure the processing precision of the press mounting surface and the outer sealing surface, but also can ensure that the axial sealing layer is in close contact with the outer sealing surface after the assembly is finished, thereby ensuring the sealing effect between the axial sealing layer and the outer sealing surface.

Preferably, the press-fitting surface is a cylindrical surface and extends to the corresponding end part of the outer ring; the inner sealing surface is a cylindrical surface and extends to the corresponding end part of the inner ring, so that the press mounting operation of the inner sealing cover is facilitated.

Preferably, the inner edge of the second segment is further provided with a secondary sealing lip made of an elastic material, the secondary sealing lip is obliquely arranged inwards, and the secondary sealing lip is in sliding contact with the inner sealing surface.

Under the action of the internal pressure of the silicone oil clutch, the main sealing lip has the tendency of relatively moving towards the direction of the rolling body, and the auxiliary sealing lip inclines towards the direction of the rolling body and is in contact with the inner sealing surface, so that the main sealing lip can be assisted to bear load to a certain extent. Meanwhile, a labyrinth form can be formed between the main sealing lip and the auxiliary sealing lip, and the sealing effect is further enhanced.

A machining apparatus for performing integral grinding machining of a ferrule for a double row angular contact ball bearing as described above, comprising at least:

a frame;

the shaping module comprises a diamond roller and a first rotary driving unit, the diamond roller is rotatably and movably connected with the rack, and the first rotary driving unit drives the diamond roller to rotate;

the diamond roller comprises a base part, wherein a grinding processing surface is arranged on the circumferential surface of the base part, and a diamond sand layer is arranged on the grinding processing surface; the grinding processing surface is provided with a sealing grinding surface and two annularly arranged channel grinding grooves;

the radial height difference between the seal grinding surface and the bottom of the channel grinding groove is N, and the error of N is not more than +/-0.005 mm;

the grinding module comprises a main shaft, a grinding wheel, a feeding driving unit and a second rotary driving unit, wherein the axis of the main shaft is parallel to the rotating center line of the diamond roller; the grinding wheel is detachably connected with the main shaft, the feeding driving unit drives the main shaft to move along the axial direction and the radial direction, and the rotating driving unit drives the main shaft to rotate;

the clamping module comprises a clamping unit and a third rotary driving unit, the third rotary driving unit drives the clamping unit to rotate, and the rotating center line of the clamping unit is parallel to the rotating center line of the main shaft.

When the grinding processing of the ring is carried out, the clamping module is used for clamping the ring and driving the ring to rotate, and the diamond roller is used for carrying out grinding processing on the grinding processing surface of the grinding wheel and further carrying out grinding processing on the ring through the grinding wheel. Compared with the conventional processing mode of the ferrule channel, the processing equipment can be used for integrally processing the ferrule channel and the sealing surface, effectively ensures the position tolerance between the ferrule channel and the sealing surface and further ensures the sealing effect of the bearing.

The size and the position precision of the corresponding characteristics on the sleeve ring can be effectively controlled by controlling the size and the position precision of the seal grinding surface and the channel grinding groove on the diamond roller. Because a plurality of ferrules can be correspondingly processed on a single diamond roller, compared with the dimensional accuracy of the structural characteristics on the ferrules which are directly controlled, the accuracy feasibility and the reliability of the diamond roller are better. Meanwhile, the limit and the bearing ring are limited, the precision measurement of the diamond roller is more convenient, and the feasibility of controlling the machining precision of the ring is further improved.

Preferably, the thickness of the diamond sand layer is not less than 1.5mm.

Preferably, the grinding module further comprises a transmission assembly, the transmission assembly comprises a central shaft and a sleeve, and the sleeve is sleeved outside the central shaft and connected with the central shaft through a bearing;

the sleeve outside be equipped with holding ring and locking ring, locking ring and sleeve releasable connection, the buddha's warrior attendant gyro wheel set up between holding ring and locking ring to be compressed tightly by holding ring and locking ring.

Preferably, the transmission assembly further comprises a driving wheel and a driven wheel, the first rotary driving unit drives the driving wheel to rotate, the driven wheel and the sleeve rotate synchronously, and the driving wheel and the driven wheel are in belt transmission or gear transmission.

A processing method for carrying out integral grinding processing on a ferrule of the double-row angular contact ball bearing adopts the processing equipment;

at least comprises the following steps:

s1: pre-treating a blank, namely selecting a ferrule blank, wherein rough machining of a channel and each sealing surface is performed on the ferrule blank in advance; after rough machining, the machining allowance of a channel is 0.15 to 0.25mm, and the machining allowance of each sealing surface is 0.1 to 0.15mm;

s2: clamping, namely mounting the ferrule blank on a clamping unit, and simultaneously mounting a corresponding grinding wheel on a main shaft of a grinding module;

s3: grinding the grinding wheel, working the first rotary driving unit and the second rotary driving unit, and rotating the diamond roller and the grinding wheel; the feed driving unit works, the position of the grinding wheel is adjusted and gradually approaches to the diamond roller, and the grinding of the grinding surface on the grinding wheel is finished;

s4: grinding the ferrule, operating the second rotary driving unit and the third rotary driving unit, and rotating the grinding wheel and the ferrule blank; and the feeding driving unit works to adjust the position of the grinding wheel and move towards the ferrule blank so as to finish the grinding processing of the ferrule blank.

Preferably, the grinding wheel dressing step is performed again in S3 every time the grinding process of 3-5 ferrules is completed.

Drawings

FIG. 1 is a schematic structural diagram of a silicone oil clutch;

FIG. 2 is a schematic structural diagram of a double-row angular contact ball bearing of a silicone oil clutch according to a first embodiment of the present invention;

FIG. 3 is an enlarged view of a portion A of FIG. 2;

FIG. 4 is a sectional view of an outer race of a double row angular contact ball bearing of a silicone oil clutch according to a first embodiment of the present invention;

FIG. 5 is a sectional view of an inner race of a double row angular contact ball bearing of a silicone oil clutch according to a first embodiment of the present invention;

FIG. 6 is a sectional view of an inner seal cover in a double row angular contact ball bearing of a silicone oil clutch according to a first embodiment of the present invention;

FIG. 7 is an enlarged view of a portion of FIG. 6 at B;

FIG. 8 is a schematic structural view of a processing apparatus according to a second embodiment of the present invention;

FIG. 9 is a side view of a reforming module in a second embodiment of a tooling apparatus according to the present invention;

FIG. 10 is a front cross-sectional view of a reforming module in a second embodiment of a processing tool according to the present invention;

FIG. 11 is a cross-sectional view of a diamond roller in a second embodiment of the apparatus of the present invention;

FIG. 12 is an enlarged view of a portion of FIG. 11 at C;

FIG. 13 is a state diagram of the inner race being processed by the processing apparatus of the second embodiment of the present invention; at the moment, the grinding wheel is in a grinding state;

FIG. 14 is a state diagram of the inner race being processed by the processing apparatus of the second embodiment of the present invention; at the moment, the workpiece is in a grinding state;

FIG. 15 is a view showing a state in which the outer race is machined by the machining apparatus according to the second embodiment of the present invention; at the moment, the grinding wheel is in a grinding state;

FIG. 16 is a view showing a state in which the outer race is machined by the machining apparatus according to the second embodiment of the present invention; at the moment, the workpiece is in a grinding state;

FIG. 17 is a view showing a state in which the outer race is machined by the machining apparatus according to the second embodiment of the present invention; at this time, the processing is completed.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Example one

As shown in fig. 2, the double-row angular contact ball bearing for the silicone oil clutch comprises an inner ring 4, an outer ring 1, a rolling body 2, a retainer and two sealing covers, wherein the rolling body 2 and the sealing covers are both positioned between the inner ring 4 and the outer ring 1, and the rolling body 2 is positioned between the two sealing covers.

As shown in fig. 3 and 4, the inner side of the outer ring 1 is provided with two outer channels 11, and the outer side of the inner ring 4 is provided with two inner channels 41. The axial distance between the centers of the two outer channels 11 is recorded as He, the axial distance between the centers of the two inner channels 41 is recorded as Hi, and the dimension errors of the He and the Hi are respectively not more than 0.004mm.

As shown in fig. 2 and 3, one of the sealing caps is an inner sealing cap 32, and the other sealing cap is an outer sealing cap 31. As shown in fig. 3, 6 and 7, the inner seal cover 32 includes a rigid skeleton, the rigid skeleton includes a first segment 321 extending along an axial direction and a second segment 324 extending along a radial direction, and the first segment 321 and the second segment 324 are arranged in an "L" shape. An axial sealing layer 323 made of elastic materials is arranged on the inner side of the second section 324, a main sealing lip 322 made of elastic materials is arranged on the inner edge of the second section 324, and the main sealing lip 322 is obliquely arranged on the outer side. Specifically, the rigid framework is made of mild steel, the axial sealing layer 323 and the main sealing lip 322 are made of fluororubber, and the axial sealing layer 323, the main sealing lip 322 and the rigid framework are bonded.

As shown in fig. 6, in particular, the total thickness of the outer edge of the inner seal cover 32 is denoted as X, and X =4.7 ± 0.1mm, that is, the total size of the first segment 321 and the axial seal layer 323 in the axial direction. The total thickness of the inner edge of the inner seal cover 32 is denoted as Y, and Y =3.95 ± 0.5mm, that is, the coverage of the primary seal lip 322 and the secondary seal groove in the axial direction.

Note that, the "inner" and "outer" of the axial seal layer 323 provided inside the second segment 324 and the main seal lip 322 provided obliquely to the outside are both inside and outside of the bearing as a whole, that is, the side facing the rolling elements 2 is the inner side and the side facing away from the rolling elements 2 is the outer side.

As shown in fig. 3 to 6, the inner side of the outer ring 1 is provided with a press-fitting surface 12 extending in the axial direction and an outer seal surface 13 extending in the radial direction, and the outer side of the inner ring 4 is provided with an inner seal surface 42 extending in the axial direction. Specifically, the press-fitting surface 12 is a cylindrical surface and extends to the corresponding end of the outer ring 1; the inner sealing surface 42 is a cylindrical surface and extends to the corresponding end of the inner ring 4, so that the press-fitting operation of the inner sealing cover 32 is facilitated.

As shown in fig. 4, the difference in height between the press-fitting surface 12 and the bottom of the outer channel 11 in the radial direction is M, and the error of M is not more than ± 0.005mm.

As shown in fig. 3 and 6, the first segment 321 is in interference fit with the press-fit surface 12, the axial seal layer 323 is in contact with the outer seal surface 13, and the primary seal lip 322 is in sliding contact with the inner seal surface 42. Specifically, the interference between the first segment 321 and the press-fitting surface 12 is not less than 0.1mm; the diameter of the end part of the main sealing lip 322 is De, the diameter of the inner sealing surface 42 is Di, and Di-De =0.3 to 0.4mm.

In the silicone oil clutch, the inner seal cover 32 of the double-row angular contact ball bearing is disposed toward the inside of the silicone oil clutch, and correspondingly, the outer seal cover 31 is disposed toward the outside of the silicone oil clutch. Under the action of internal pressure of the silicone oil clutch, the inner sealing cover 32 has a tendency of moving towards the rolling body 2, the first section 321 realizes sealing with the press-fitting surface 12 in an interference fit manner, and is assisted by extrusion sealing of the axial sealing layer 323 and the outer sealing surface 13, and the sealing between the inner sealing and the outer ring 1 is reliable and stable; and the main sealing lip 322 realizes sliding sealing with the inner ring 4 in a self-locking mode, and the larger the internal pressure is, the better the sealing effect is.

In addition, another factor affecting the sealing performance of the bearing is the size and position accuracy of the groove and the sealing surface on the ferrule, and when the accuracy is low, the sealing effect of the sealing cover is affected when the inner ring 4 and the outer ring 1 move relatively. By controlling the positional accuracy of the press-fitting surface 12 and the outer channel 11, the risk of leakage due to the movement of the seal can be reduced to some extent.

Further, as shown in fig. 3 and 4, a transition groove is provided between the surface of the outer sealing surface 13 and the press-fitting surface 12, and the provision of the transition groove not only can better ensure the machining accuracy of the press-fitting surface 12 and the outer sealing surface 13, but also can ensure that the axial sealing layer 323 is in close contact with the outer sealing surface 13 after the assembly is completed, thereby ensuring the sealing effect between the axial sealing layer 323 and the outer sealing surface 13.

Further, as shown in fig. 3, 6 and 7, the inner edge of the second segment 324 is further provided with a secondary sealing lip 325 made of an elastic material, the secondary sealing lip 325 is inclined inward, and the secondary sealing lip 325 is in sliding contact with the inner sealing surface 42. The diameter of the end part of the secondary sealing groove is Dc, and Di-Dc is more than or equal to 0.1 to 0.2mm.

Under the action of the internal pressure of the silicone oil clutch, the main seal lip 322 has a tendency to move relatively towards the rolling body 2, and the auxiliary seal lip 325 inclines towards the rolling body 2 and contacts with the inner seal surface 42, so that the load of the main seal lip 322 can be assisted to a certain extent. Meanwhile, a labyrinth form can be formed between the main sealing lip 322 and the auxiliary sealing lip 325, and the sealing effect is further enhanced.

The outer sealing cover 31 may adopt a conventional structure, and mainly functions to prevent grease inside the bearing from leaking, and the specific structure is not the innovation point of the present application, and therefore is not described herein.

Example two

As shown in fig. 8, a machining apparatus for performing integral grinding of a ferrule on a double row angular contact ball bearing according to the first embodiment includes a frame 5, a truing module, a grinding module, and a clamping module.

As shown in fig. 8-10, the shaping module includes a diamond roller 62 and a first rotation driving unit 61, the diamond roller 62 is rotatably connected to the frame 5, and the first rotation driving unit 61 drives the diamond roller 62 to rotate.

As shown in fig. 11 and 12, the diamond roller 62 includes a base portion 623, a thinning surface is provided on a circumferential surface of the base portion 623, and a diamond sand layer 624 is provided on the thinning surface. The grinding processing surface is provided with a sealing grinding surface 622 and two annularly arranged channel grinding grooves 621. The thickness of the diamond sand layer 624 is marked as F, and F is not less than 1.5mm.

The base 623 of the diamond roller 62 is formed by turning, and a sealing grinding surface 622 and a channel grinding groove 621 are machined; the layer 624 of diamond grit is then provided in sintered form and finally the layer 624 of diamond grit is finished in ground form.

As shown in fig. 11 and 12, the difference in height in the radial direction between the seal abrading surface 622 and the bottom of the groove abrading groove 621 is N, and the error in N is not more than ± 0.005mm. Specifically, the value ranges of the inner sealing surface 42 of the inner ring 4 and the outer sealing surface 13 of the outer ring 1 are different, wherein the value of N is relatively small due to the arrangement of the axial sealing surface on the outer ring 1, and the value of N on the inner ring 4 can be relatively large.

As shown in fig. 8, the grinding module includes a spindle 82, a grinding wheel 81, a feed driving unit, and a second rotary driving unit, and the axis of the spindle 82 is arranged in parallel with the rotation center line of the diamond roller 62. The grinding wheel 81 is detachably connected with the spindle 82, the feed driving unit drives the spindle 82 to move axially and radially, and the rotation driving unit drives the spindle 82 to rotate.

As shown in fig. 8, the clamping module includes a clamping unit 7 and a third rotation driving unit, the third rotation driving unit drives the clamping unit 7 to rotate, and a rotation center line of the clamping unit 7 is parallel to a rotation center line of the spindle 82. The clamping unit 7 can adopt an electromagnetic centerless clamp, and can realize reliable clamping for the inner ring 4 or the outer ring 1.

As shown in fig. 13 to 17, when grinding the ferrule, the clamping module is configured to clamp the ferrule and rotate the ferrule, and the diamond roller 62 is configured to grind the grinding surface of the grinding wheel 81 and further grind the ferrule by the grinding wheel 81. Compared with the conventional processing mode of the ferrule channel, the processing equipment can be used for integrally processing the ferrule channel and the sealing surface, so that the position tolerance between the ferrule channel and the sealing surface is effectively ensured, and the sealing effect of the bearing is further ensured.

By controlling the size and position accuracy of the seal dressing surface 622 and the channel dressing groove 621 on the diamond roller 62, the size and position accuracy of the corresponding features on the collar can be effectively controlled. Since a single diamond roller 62 can be correspondingly processed with a plurality of ferrules, the accuracy feasibility and reliability of controlling the diamond roller 62 are better than the dimensional accuracy of the structural features on the ferrules directly controlled. Meanwhile, the limit and the bearing ring are more convenient to measure the precision of the diamond roller 62, and the feasibility of controlling the machining precision of the ring is further improved.

Further, as shown in fig. 9 and 10, the grinding module further includes a transmission assembly 63, where the transmission assembly 63 includes a central shaft and a sleeve, and the sleeve is sleeved outside the central shaft and connected with the central shaft through a bearing. The sleeve outside be equipped with holding ring and locking ring, locking ring and sleeve detachable connection, diamond roller 62 set up between holding ring and locking ring to be compressed tightly by holding ring and locking ring.

Specifically, as shown in fig. 9 and 10, the transmission assembly 63 further includes a driving wheel and a driven wheel, the first rotation driving unit 61 drives the driving wheel to rotate, the driven wheel and the sleeve rotate synchronously, and the driving wheel and the driven wheel are in belt transmission or gear transmission.

The positioning ring and the locking ring axially position and lock the diamond roller 62, and the sleeve radially positions and locks the diamond roller 62. When the diamond roller wheel 62 works, the central shaft is still, the sleeve and the diamond roller wheel 62 synchronously rotate, and the bearing is arranged between the sleeve and the diamond roller wheel 62 to improve the rotation precision of the diamond roller wheel 62.

Further, as shown in fig. 9 and 10, the central shaft is detachably connected to the frame 5, so as to facilitate the mounting and dismounting operation of the diamond roller 62. Specifically, be equipped with two installation arms in frame 5, be equipped with the latch segment on two installation arms respectively, the latch segment with correspond installation arm releasable connection, seted up the mounting groove on installation arm and the latch segment respectively, synthetic mounting hole is enclosed to the mounting groove on installation arm and the latch segment, the center pin is connected with the mounting hole. The sleeve is disposed between the two mounting arms.

EXAMPLE III

As shown in fig. 13 to 17, a machining method for integral grinding of a ferrule of a double row angular contact ball bearing according to the first embodiment employs a machining apparatus according to the second embodiment;

at least comprises the following steps:

s1: pre-treating a blank, namely selecting a ferrule blank, wherein rough machining of a channel and each sealing surface is performed on the ferrule blank in advance; after rough machining, the machining allowance of the channel is 0.15 to 0.25mm, and the machining allowance of each sealing surface is 0.1 to 0.15mm; wherein, the machining allowance is the allowance of the corresponding characteristic diameter, namely the bilateral allowance;

s2: clamping, namely installing the ferrule blank on the clamping unit 7, and installing the corresponding grinding wheel 81 on the main shaft 82 of the grinding module;

s3: grinding the grinding wheel 81, operating the first rotary driving unit 61 and the second rotary driving unit, and rotating the diamond roller 62 and the grinding wheel 81; the feed driving unit works, the position of the grinding wheel 81 is adjusted and gradually approaches to the diamond roller 62, and the grinding of the grinding surface on the grinding wheel 81 is completed;

s4: grinding the ferrule, operating the second rotary driving unit and the third rotary driving unit, and rotating the grinding wheel 81 and the ferrule blank; the feed driving unit operates to adjust the position of the grinding wheel 81 and move toward the ferrule blank, thereby completing the grinding of the ferrule blank.

Further, every time the grinding processing of 3-5 ferrules is completed, the grinding step of the grinding wheel 81 is carried out again S3, so that the accuracy of the grinding wheel 81 is ensured, and the processing error of the product is effectively controlled.

In this embodiment, the selected blank is rough machined in the form of machining, and the machining method of the present application involves only final grinding and finishing. The non-core technical characteristics such as the transition groove recorded in the embodiment are selectively not subjected to grinding processing, so that the feasibility of integral grinding processing is effectively ensured.

By adopting the processing method, the structural characteristics such as the channel, the sealing surface and the like can be subjected to one-time grinding and finish machining in an integral processing mode, the position precision among the structural characteristics can be improved on the basis of ensuring the size and the shape precision of the structural characteristics, and the processing efficiency is higher.

In conclusion, the above description is only for the preferred embodiment of the present invention and should not be construed as limiting the present invention, and any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A double-row angular contact ball bearing for a silicone oil clutch comprises an inner ring, an outer ring, a rolling body, a retainer and two sealing covers, wherein the rolling body and the sealing covers are positioned between the inner ring and the outer ring, and the rolling body is positioned between the two sealing covers; two outer channels are arranged on the inner side of the outer ring;

the method is characterized in that:

one of the sealing covers is an inner sealing cover, and the other sealing cover is an outer sealing cover;

the inner sealing cover comprises a rigid framework, the rigid framework comprises a first section extending along the axial direction and a second section extending along the radial direction, and the first section and the second section are arranged in an L shape; an axial sealing layer made of an elastic material is arranged on the inner side of the second section, a main sealing lip made of an elastic material is arranged on the inner edge of the second section, and the main sealing lip is obliquely arranged towards the outer side;

the inner side of the outer ring is provided with a press-fitting surface extending along the axial direction and an outer sealing surface extending along the radial direction; the outer side of the inner ring is provided with an inner sealing surface extending along the axial direction;

the height difference between the press-mounting surface and the bottom of the outer channel in the radial direction is M, and the error of M is not more than +/-0.005 mm;

the first subsection is in interference fit with the press-fitting surface, and the axial sealing layer is in contact with the outer sealing surface; the primary seal lip is in sliding contact with the inner seal surface.

2. The double row angular contact ball bearing according to claim 1, wherein: and a transition groove is arranged between the outer sealing surface and the press-fitting surface.

3. The double row angular contact ball bearing according to claim 1, wherein: the press-mounting surface is a cylindrical surface and extends to the corresponding end part of the outer ring; the inner sealing surface is a cylindrical surface and extends to the corresponding end part of the inner ring.

4. The double row angular contact ball bearing according to any one of claims 1 to 3, wherein: and the inner edge of the second section is also provided with an auxiliary sealing lip made of an elastic material, the auxiliary sealing lip is obliquely arranged inwards, and the auxiliary sealing lip is in sliding contact with the inner sealing surface.

5. Machining device for the integral grinding of ferrules for double row angular contact ball bearings according to any of claims 1 to 4, characterized in that it comprises at least:

a frame;

the shaping module comprises a diamond roller and a first rotary driving unit, the diamond roller is rotatably and movably connected with the rack, and the first rotary driving unit drives the diamond roller to rotate;

the diamond roller comprises a base part, wherein a grinding processing surface is arranged on the circumferential surface of the base part, and a diamond sand layer is arranged on the grinding processing surface; the grinding processing surface is provided with a sealing grinding surface and two annularly arranged channel grinding grooves;

the radial height difference between the seal grinding surface and the bottom of the channel grinding groove is N, and the error of N is not more than +/-0.005 mm;

the grinding module comprises a main shaft, a grinding wheel, a feeding driving unit and a second rotary driving unit, wherein the axis of the main shaft is parallel to the rotating center line of the diamond roller; the grinding wheel is detachably connected with the main shaft, the feeding driving unit drives the main shaft to move along the axial direction and the radial direction, and the rotating driving unit drives the main shaft to rotate;

the clamping module comprises a clamping unit and a third rotary driving unit, the third rotary driving unit drives the clamping unit to rotate, and the rotating center line of the clamping unit is parallel to the rotating center line of the main shaft.

6. The processing apparatus of claim 5, wherein: the thickness of the diamond sand layer is not less than 1.5mm.

7. The processing apparatus of claim 5, wherein: the grinding module further comprises a transmission assembly, the transmission assembly comprises a central shaft and a sleeve, and the sleeve is sleeved outside the central shaft and is connected with the central shaft through a bearing;

the sleeve outside be equipped with holding ring and locking ring, locking ring and sleeve releasable connection, the buddha's warrior attendant gyro wheel set up between holding ring and locking ring to be compressed tightly by holding ring and locking ring.

8. The processing apparatus of claim 7, wherein: the transmission assembly further comprises a driving wheel and a driven wheel, the first rotary driving unit drives the driving wheel to rotate, the driven wheel and the sleeve rotate synchronously, and the driving wheel and the driven wheel are in belt transmission or gear transmission.

9. A machining method for performing integral grinding of a ferrule for a double row angular contact ball bearing according to any one of claims 1 to 4, characterized in that: using the processing apparatus of any one of claims 5-8;

at least comprises the following steps:

s1: pre-processing a blank, namely selecting a ferrule blank, wherein the rough processing of a channel and each sealing surface is performed on the ferrule blank in advance; after rough machining, the machining allowance of the channel is 0.15 to 0.25mm, and the machining allowance of each sealing surface is 0.1 to 0.15mm;

s2: clamping, namely mounting the ferrule blank on a clamping unit, and simultaneously mounting a corresponding grinding wheel on a main shaft of a grinding module;

s3: grinding the grinding wheel, working the first rotary driving unit and the second rotary driving unit, and rotating the diamond roller and the grinding wheel; the feed driving unit works to adjust the position of the grinding wheel and gradually approach the diamond roller to finish the grinding of the grinding surface on the grinding wheel;

s4: grinding the ferrule, operating the second rotary driving unit and the third rotary driving unit, and rotating the grinding wheel and the ferrule blank; and the feeding driving unit works to adjust the position of the grinding wheel and move towards the ferrule blank so as to finish the grinding processing of the ferrule blank.

10. The process of claim 9, wherein: and (3) repeating the grinding wheel grinding step S3 every time the grinding processing of 3-5 ferrules is completed.

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