CN118181004A - Bearing ring grinding equipment and method - Google Patents

Abstract

The invention relates to the technical field of bearing machining equipment, and particularly discloses bearing ring grinding equipment and a bearing ring grinding method. The bearing ring grinding equipment comprises a main shaft box and a grinding unit, wherein the main shaft box is supported by a feed box and is fixedly provided with a main shaft, a telescopic shaft rotating along with the main shaft is arranged in the main shaft, a first inserting part and an inner supporting chuck are fixed at the front end of the telescopic shaft, and a chuck is fixed at the front side of the main shaft; the inner support chuck reaches an expanding state when the first plug-in connection part is in plug-in connection with the second plug-in connection part. The bearing ring grinding equipment is provided with two clamping mechanisms of the chuck and the inner support chuck, and is matched with a grinding device in a grinding unit, so that the end face grinding, the outer circle grinding and the inner circle grinding of the bearing ring can be combined and processed, and the grinding efficiency is improved; the position of the bearing ring cannot be changed in the clamping and switching process, so that the machining references based on different grinding links are uniform, and the machining precision of the bearing is improved.

Description

Bearing ring grinding equipment and method

Technical Field

The invention relates to the technical field of bearing machining equipment, in particular to bearing ring grinding equipment and a bearing ring grinding method.

Background

In the processing production of the bearing, the grinding processing of the bearing ring is a necessary step, and is also a key link affecting the processing precision of the bearing. In the grinding process of the bearing ring, the grinding steps of end face grinding, outer circle grinding (outer diameter surface grinding of an outer ring, inner groove grinding of an inner ring) and inner circle grinding (outer groove grinding of an outer ring and inner diameter surface grinding of an inner ring) are divided according to the difference of grinding positions, and in different grinding steps, the clamping modes of the bearing ring have different technical requirements, so that the bearing ring is difficult to be combined and processed on the existing grinding machine as one process, a plurality of scattered processes are sequentially completed by using a plurality of grinding machines, the bearing ring is required to be clamped and switched for a plurality of times in the whole grinding process, positioning errors in the clamping operation are unavoidable, and reference superposition errors exist due to non-uniform positioning references during the plurality of times of clamping, so that the grinding processing precision of the bearing ring is greatly reduced, and the integral processing quality of the bearing is further influenced. In addition, the bearing ring is ground by a plurality of grinding devices in a dispersing process, so that the process route of bearing production is prolonged, the processing production efficiency of the bearing is reduced, and the production cost is increased.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides bearing ring grinding equipment which can combine end face grinding, external circle grinding and internal circle grinding as one procedure for processing. The bearing ring grinding equipment is suitable for grinding the bearing outer ring and the bearing inner ring by reasonably arranging the clamping mechanism, and ensures that the machining references of the bearing rings in different grinding links are kept consistent while the merging procedure is realized, so that the machining precision of the bearing is obviously improved.

Meanwhile, the invention also provides a method for grinding the bearing ring by using the bearing ring grinding equipment.

In order to achieve the technical purpose, the invention adopts the following technical scheme:

The bearing ring grinding equipment comprises a machine body, a main shaft box and a grinding unit, wherein the main shaft box and the grinding unit are arranged on the machine body; the main shaft box is supported by a feed box and can move forwards and backwards, and a main shaft extending forwards and backwards is fixed on the main shaft box; the method is characterized in that: the telescopic shaft synchronously rotates along with the main shaft and can stretch and move at the front end of the main shaft, the stretching amount of the telescopic shaft is regulated by a first driving device, the front end of the telescopic shaft is fixedly provided with a first inserting part and an inner supporting chuck, and the front end of the main shaft is provided with a containing cavity for containing the first inserting part and the inner supporting chuck; the front side of the main shaft is fixed with a hollow chuck which can self-center, and the hollow part is used for the first inserting part and the inner supporting chuck to pass through; the inner support chuck is composed of a plurality of inner support petals which are axisymmetrically distributed around the telescopic shaft and can slide back and forth, and elastic pieces for driving the inner support petals to reset forward, and the inner support petals move backward and move radially outwards along the telescopic shaft; the feeding box is fixedly provided with a top shaft which is positioned at the front side of the telescopic shaft and can freely rotate, and a second driving device for adjusting the axial position of the top shaft, and the rear end of the top shaft is provided with a second inserting part; the central axes of the main shaft, the chuck, the telescopic shaft and the top shaft are coincident; the first plug-in part and the second plug-in part can be in plug-in fit, and the inner supporting valve is pushed by the top shaft to move backwards in the plug-in fit process; the grinding unit comprises a grinding device for carrying out external grinding, end face grinding and internal grinding on the bearing ring.

The method for grinding the bearing ring by using the bearing ring grinding equipment comprises the following steps:

1. The bearing sleeve is sleeved on the inner supporting clamp head, the telescopic shaft is close to the top shaft, the first inserting part is in inserting fit with the second inserting part, the inner supporting clamp head tightly pushes the inner wall of the bearing ring, and the clamping operation of the bearing ring is completed;

2. After the bearing ring is clamped and fixed by the inner support chuck, finishing external circle grinding and end face grinding by utilizing a grinding device in a grinding unit;

3. After finishing cylindrical grinding and end face grinding of the bearing ring, enabling the telescopic shaft and the top shaft to synchronously move backwards until the bearing ring reaches the inside of the chuck, and clamping and fixing the bearing ring by using the chuck; the top shaft moves forwards, and the telescopic shaft moves backwards until the first inserting part and the inner supporting chuck retract into the accommodating cavity;

4. after the bearing ring is clamped and fixed by the chuck, the internal grinding is finished by utilizing a grinding device in the grinding unit.

Compared with the prior art, the invention has the following technical effects:

The bearing ring grinding equipment is provided with the clamping mechanisms of the two sleeves of the chuck and the inner support chuck, can clamp the bearing ring in different modes, does not have intermediate links such as workpiece loading and unloading, auxiliary positioning and the like in the switching process of the clamping modes, can continuously finish the work in cooperation with the grinding device in the grinding unit, can combine and process the end face grinding, the outer circle grinding and the inner circle grinding of the bearing ring on the grinding equipment as one process, shortens the process route of the grinding processing of the bearing ring, and improves the grinding processing efficiency of the bearing ring. According to the channel position difference of the bearing inner ring and the bearing outer ring, the grinding tool shape, the size and other parameters of the grinding device in the grinding unit are correspondingly and conventionally adjusted, and the grinding tool is applicable to the grinding processing of the bearing inner ring and the bearing outer ring and has high applicability. The inner support chuck is in ingenious mode matching with the chuck, and when the clamping and switching are carried out between the inner support chuck and the chuck, the positioning reference of the bearing ring does not need to be selected again, so that the processing references based on end face grinding, outer circle grinding and inner circle grinding are uniform and coincident, and the bearing processing precision is improved. In addition, when the bearing ring grinding equipment carries out grinding processing on the bearing ring, the working essence is core grinding of high-speed rotation of a workpiece, compared with the prior art that a centerless grinding machine is adopted for carrying out internal grinding and external grinding and an end grinding type surface grinding machine is adopted for carrying out end face grinding, the grinding mode in the bearing ring grinding equipment has higher processing precision, and simultaneously, when the bearing ring is subjected to external grinding and end face grinding, a telescopic shaft is in plug-in fit with a top shaft to form a shaft body with two ends provided with supports, so that radial swing of an internal support chuck can be effectively avoided, and the processing precision of external grinding and end face grinding is further improved.

Drawings

Fig. 1 is a schematic view of the overall structure of a bearing ring grinding apparatus.

Fig. 2 is a schematic view of the structure of the bearing ring grinding apparatus in the other direction.

Fig. 3 is a schematic diagram of the fit of the headstock, spindle, chuck, and telescopic shaft.

Fig. 4 is a schematic structural view of the telescopic shaft and the top shaft.

Fig. 5 is a schematic diagram of a state after the first plugging portion and the second plugging portion are plugged and matched.

Fig. 6 is a schematic view showing a state of the bearing ring grinding apparatus when the bearing ring is clamped and fixed by the inner support chuck.

Fig. 7 is a schematic view of an end face grinding state of a bearing ring.

Fig. 8 is a schematic view of the outer cylindrical grinding state of the bearing outer ring.

Fig. 9 is a schematic view of the outer grinding state of the bearing inner ring.

Fig. 10 is a schematic view showing a state where the telescopic shaft is engaged with the top shaft to feed the bearing ring into the chuck.

Fig. 11 is a schematic view of a chuck clamping a bearing ring.

Fig. 12 is a schematic view showing a state of the bearing ring grinding apparatus when the bearing ring is clamped and fixed by the chuck.

Fig. 13 is a schematic view showing an operation state of the bearing ring grinding apparatus when performing internal grinding.

Fig. 14 is a schematic view of an inner grinding state of the bearing outer ring.

Fig. 15 is a schematic view of an inner grinding state of the bearing inner ring.

Fig. 16 is a schematic view showing the cooperation of the main shaft, the telescopic shaft and the first driving device when the telescopic shaft is in an extended state.

Fig. 17 is a schematic view of the cooperation of the main shaft, the telescopic shaft and the first driving device with the telescopic shaft in a retracted state.

Fig. 18 is an exploded view of the inner support collet and the first plug.

Fig. 19 is a schematic structural view of the feeding device.

Fig. 20 is a schematic diagram of the cooperation of the clamping seat and the bearing ring.

Fig. 21 is a schematic view of a state of the inner support chuck when the bearing ring is clamped by the feeding device.

Fig. 22 is a schematic view showing a state that the clamping seat is retracted after the bearing ring is clamped and fixed by the inner support chuck.

Fig. 23 is a schematic view showing the fitting states of the telescopic shaft, the top shaft and the top bracket when the clamping seat is retracted.

In the figure:

1. The machine body comprises a machine body, 2, a first driving device, 3, a spindle box, 4, a chuck, 5, a feeding device, 6, a jacking shaft, 7, a rotating arm, 8, a shaft seat, 9, a grinding device, 91, an outer diameter surface grinding device, 92, an inner channel grinding device, 93, an outer channel grinding device, 94, an inner diameter surface grinding device, 10, a control unit, 11, a telescopic shaft, 111, an inclined T-shaped groove, 12, a spindle, 13, a second driving device, 14, a feeding box, 15, an inner supporting chuck, 16, a containing cavity, 17, a first inserting part, 18, a push ring, 19, an inner supporting flap, 191, a T-shaped sliding block, 20, a second inserting part, 21, a push spring, 22, a bearing ring, 221, a bearing outer ring, 222, a bearing inner ring, 23, a rotating head, 24, a sliding key, 25, a sliding groove, 26, an open end, 27, a clamping seat, 28, 29, a first telescopic arm, 30, a supporting seat, 31, a second telescopic arm, 32 and a supporting frame.

Detailed Description

The technical solutions of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments.

The embodiment discloses a specific structure of bearing ring grinding equipment, and the specific structure and working principle of the bearing ring grinding equipment are illustrated in detail through the accompanying drawings, and the specific structure and working principle are illustrated with reference to fig. 1-5:

The bearing ring grinding equipment comprises a machine body 1, wherein a spindle box 3 and a grinding unit which are distributed front and back are arranged on the machine body 1;

The headstock 3 is supported by a feed box 14 so as to be movable in the front-rear direction on the machine body 1, a spindle 12 extending in the front-rear direction is fixed to the headstock 3, and the spindle 12 is driven by the headstock 3 so as to be rotatable at a high speed; the main shaft 12 is internally provided with a telescopic shaft 11 which is driven by the main shaft to synchronously rotate along with the main shaft, the telescopic shaft 11 can carry out telescopic movement at the front end of the main shaft 12, and the telescopic shaft 11 is in transmission connection with a first driving device 2; the first driving device 2 can drive the telescopic shaft 11 to move back and forth so as to adjust the telescopic amount of the telescopic shaft 11 relative to the front end of the main shaft 12; the front end of the telescopic shaft 11 is fixedly provided with a first inserting part 17 and an inner supporting chuck 15, the front end of the main shaft 12 is provided with a containing cavity 16, and when the telescopic shaft 11 retracts backwards, the first inserting part 17 and the inner supporting chuck 15 can be contained in the containing cavity 16; the front end of the main shaft 12 is fixedly provided with a chuck 4, the chuck 4 adopts a hollow self-centering chuck, and the hollow part can be penetrated by the first inserting part 17 and the inner supporting chuck 15 so as to ensure that the chuck 4 does not interfere the front-back movement of the telescopic shaft 11; the inner support chuck 15 is composed of a plurality of inner support petals 19 and elastic pieces; the inner support petals 19 are at least three, are distributed around the telescopic shaft 11 in an axisymmetric manner, the inner support petals 19 and the telescopic shaft 11 are in sliding fit and can slide back and forth, during the backward sliding process of the inner support petals 19, the inner support petals 19 move outwards along the radial direction of the telescopic shaft 11 at the same time, namely, the inner support petals 19 move outwards of the telescopic shaft 11, so that the inner support clamping heads 15 are expanded, and in the same way, during the forward moving process of the inner support petals 19, the inner support petals 19 move inwards along the radial direction of the telescopic shaft 11 at the same time, namely, the inner support petals 19 move towards the central axis direction of the telescopic shaft 11, so that the inner support clamping heads 15 are contracted; the elastic piece is used for driving the inner support flap 19 to move forwards so as to enable the inner support chuck 15 to have the function of automatically resetting to a contracted state;

A top shaft 6 and a second driving device 13 are additionally fixed on the feeding box 14, the top shaft 6 can freely rotate, the top shaft 6 is positioned at the front side of the telescopic shaft 11, the rear end of the top shaft 6 is provided with a second inserting part 20, and the second driving device 13 is in transmission connection with the top shaft 6 so as to be capable of adjusting the axial position of the top shaft 6; the central axes of the main shaft 12, the chuck 4, the telescopic shaft 11 and the top shaft 6 are overlapped; the first plugging portion 17 and the second plugging portion 20 can be plugged and matched, as shown in fig. 5, in the process of plugging and matching the first plugging portion 17 and the second plugging portion 20, all the inner support flaps 19 are pushed by the top shaft 6 to synchronously move backwards, namely, the inner support chucks 15 gradually expand;

The grinding unit comprises a plurality of grinding devices 9, and the corresponding grinding devices 9 can be used for carrying out external circle grinding and end face grinding on the bearing ring clamped and fixed by the inner support chuck 15 and also can be used for carrying out internal circle grinding on the bearing ring clamped by the chuck 4, wherein the bearing ring comprises a bearing outer ring and a bearing inner ring; the grinding device 9 is a common device on the existing grinding machine, and is generally composed of a grinding tool, a power part for driving the grinding tool to rotate and a feeding mechanism for adjusting the position of the grinding tool, wherein the grinding tool is generally a grinding wheel;

in addition, the bearing ring grinding equipment is further provided with a control unit 10, and the working states of the spindle box 3, the feed box 14, the first driving device 2, the second driving device 13 and the grinding device 9 in the grinding unit are regulated and controlled by the control unit 10 according to a preset program, so that automatic production with different degrees can be realized according to requirements.

The embodiment discloses a method for grinding a bearing ring by using the bearing ring grinding equipment, which comprises the following steps:

1. And clamping the bearing ring by using the inner support chuck.

Referring to fig. 5 and 6, after the bearing ring 22 formed by turning is heat treated, the bearing ring 22 is sleeved on the inner support chuck 15, so that the telescopic shaft 11 and the top shaft 6 are close to each other, the first plug-in part 17 is in plug-in fit with the second plug-in part 20, and meanwhile, the inner support chuck 15 is in an expanded state, and at the moment, the inner support chuck 15 tightly pushes the inner wall of the bearing ring 22, so that the clamping operation of the bearing ring 22 is completed.

In the bearing ring grinding equipment, the inner supporting chuck is used for clamping and fixing the bearing ring from the inside, and is an improved inner expansion type clamp, the traditional inner expansion type clamp mainly realizes the expansion function by adjusting the taper of the expansion sleeve, and the clamping effect on a workpiece can be realized firmly, but the distribution of the acting force against the inner surface of the workpiece is not balanced, so that the accurate self-centering function is difficult to realize; in the invention, as shown in fig. 5 and 6, the inner support chuck 15 is in an expanding state by sliding the inner support flaps 19, and the inner support chuck 15 has no taper change, so that a more stable clamping effect can be realized, a precise self-centering function can be realized, and the fact that after the inner support chuck 15 clamps the bearing ring 22, the central axes of the bearing ring 22 and the main shaft 12 tend to be coincident, and auxiliary radial positioning is not needed by manual work or an additional device.

2. And carrying out cylindrical grinding and end face grinding on the bearing ring.

As shown in fig. 6 to 9, after the bearing ring 22 is clamped and fixed by the inner support chuck 15, the outer circular surface and two end surfaces of the bearing ring 22 are fully exposed, the bearing ring is driven by the main shaft 12 to rotate at a high speed, and is driven by the feed box 14 to feed back and forth, so that the outer circular grinding and the end surface grinding can be finished by utilizing the grinding device 9 in the grinding unit, and the grinding working principle is consistent with that of the existing horizontal grinding machine; since the same processing standard is adopted in the process of cylindrical grinding and end face grinding, the clamping state of the bearing ring 22 does not need to be adjusted, so that the processing sequence of the cylindrical grinding and the end face grinding has no specific requirement; as shown in fig. 5 and 6, when the bearing ring 22 is subjected to external grinding and end face grinding, the first plug-in portion 17 and the second plug-in portion 20 are in a plug-in fit state, and at this time, the telescopic shaft 11 and the top shaft 6 form a shaft body with supports at both ends, so that rotation is more stable, and radial swing of the inner support chuck 15 and the bearing ring 22 in the high-speed rotation process is avoided, thereby improving machining precision in the external grinding and end face grinding links.

3. And clamping the bearing ring by using a chuck.

Referring to fig. 10, 11 and 12, after the outer circle grinding and the end face grinding of the bearing ring 22 are completed, the telescopic shaft 11 and the top shaft 6 are synchronously moved backwards until the bearing ring 22 on the inner support chuck 15 reaches the inside of the chuck 4, and the chuck 4 is used for clamping and fixing the bearing ring 22; thereafter, the top shaft 6 is moved forward, the inner support chuck 15 is automatically reset to a contracted state along with the forward movement of the top shaft 6, namely, the clamping effect on the bearing ring 22 is released, and the telescopic shaft 11 is moved backward until the first inserting part and the inner support chuck 15 are retracted into the accommodating cavity; after the chuck 4 clamps and fixes the bearing ring 22, the above-mentioned position adjustment of the telescopic shaft 11 and the top shaft 6 aims to make room for the subsequent grinding of the bearing ring.

Referring to fig. 10 and 11, since the central axes of the main shaft 12, the chuck 4, the telescopic shaft 11 and the top shaft 6 are coincident, and in addition, in the process of switching the clamping mode, the chuck 4 clamps and fixes the bearing ring 22 and then withdraws the inner supporting chuck 15, thereby ensuring that the processing standard of the bearing ring is not changed, which is a main reason that the bearing ring grinding device can improve the processing precision of the bearing.

4. The bearing ring is internally ground.

Referring to fig. 12 to 15, after the bearing ring 22 is clamped and fixed by the chuck 4, the inner circular surface of the bearing ring 22 is fully exposed, and is driven by the main shaft 12 to rotate at a high speed and is driven by the feed box 14 to feed back and forth, so that inner circular grinding can be completed by using the grinding device 9 in the grinding unit, and the grinding working principle is consistent with that of the existing horizontal grinding machine.

As is well known, the bearing ring includes a bearing inner ring and a bearing outer ring, and the structures of the bearing inner ring and the bearing outer ring are substantially different, specifically, the outer circumferential side of the bearing outer ring is an outer diameter surface, the inner circumferential side is an outer channel, the outer circumferential side of the bearing inner ring is an inner channel, and the inner circumferential side is an inner diameter surface.

As shown in fig. 8 and 14, when the present bearing ring grinding apparatus is used for machining the bearing outer ring 221, the grinding means for performing outer cylindrical grinding in the grinding unit should be an outer diameter surface grinding means 91 for performing grinding machining of the outer diameter surface of the bearing outer ring 221; the grinding means for performing the inner grinding in the grinding unit should be an outer race grinding means 93 to perform grinding processing of the outer race of the bearing outer race 221.

As shown in fig. 9 and 15, when the present bearing ring grinding apparatus is used for machining the bearing inner ring 222, the grinding means for performing outer cylindrical grinding in the grinding unit should be the inner raceway grinding means 92 for grinding the inner raceway of the bearing inner ring 222, and the grinding means for performing inner cylindrical grinding in the grinding unit should be the inner diameter surface grinding means 94 for grinding the inner diameter surface of the bearing inner ring 222.

Therefore, the grinding device in the grinding unit is correspondingly configured according to the type of the bearing ring to be processed, and the bearing ring grinding equipment can be suitable for grinding the bearing outer ring and the bearing inner ring.

In the bearing ring grinding process, the external grinding and the end face grinding are different from each other on the grinding part of the bearing ring, and are basically two independent grinding processes, and are usually completed by two independent grinding devices respectively; in addition, because this bearing ring grinding equipment is fixed the bearing ring clamping back, the bearing ring can rotate and can feed from beginning to end, and grinding device also need possess the function that the mill fed, owing to this characteristics, cylindrical grinding and end face grinding can combine the actual conditions and adopt same grinding device to accomplish, this is also the mode that is comparatively common in the prior art, for example, utilize the circumference of mill in the grinding device to carry out cylindrical grinding to the bearing ring with the mode of week mill, utilize the both ends face of mill in this grinding device to carry out the end face grinding respectively in the both ends of bearing ring simultaneously, thereby can improve the compactness of this bearing ring grinding equipment.

In the bearing ring grinding apparatus, the telescopic shaft rotates synchronously with the main shaft and can stretch out and draw back, so that the implementation of the technical means does not have a technical barrier in the prior art, and the following modes can be adopted but are not limited to:

referring to fig. 16 and 17, a shaft hole is formed in the main shaft 12 along a central axis, and the telescopic shaft 11 is located in the shaft hole and can move back and forth along the shaft hole; one of the main shaft 12 and the telescopic shaft 11 is provided with an axially extending chute 25, the other is fixed with a sliding key 24 capable of sliding back and forth along the chute 25, and the main shaft 12 and the telescopic shaft 11 cannot rotate relatively based on the cooperation of the chute 25 and the sliding key 24; this ensures that the telescopic shaft 11 can expand and contract and can rotate synchronously with the main shaft 12.

In the bearing ring grinding device, the telescopic shaft is adjusted by the first driving device, the first driving device can be arranged inside the main shaft based on the matching relation between the telescopic shaft and the main shaft, in the prior art, the situation that the driving device with a displacement driving function is arranged inside the main shaft is quite common, for example, a rotary oil cylinder is arranged inside the main shaft, and the rotary oil cylinder is used as the first driving device to drive the telescopic shaft to move; in view of the problems of structural simplicity, implementation cost, etc., the first driving device is preferably implemented in the following manner:

Referring to fig. 16 and 17, the first driving device 2 is an oil cylinder or an air cylinder, and is located at the rear side of the main shaft 12, the cylinder body of the first driving device 2 is fixedly connected with the main shaft box 3, and the telescopic rod of the first driving device 2 is rotatably connected with the telescopic shaft 11 through the rotating head 23; the first driving device 2 can thereby adjust the amount of expansion and contraction of the expansion and contraction shaft 11 without interfering with the rotation of the expansion and contraction shaft 11.

In the bearing ring grinding device, the chuck is a hollow chuck so that the first inserting part and the inner supporting chuck can penetrate through the hollow part of the chuck, the manual chuck in the prior art is mostly of hollow design, and the technical requirements in the bearing ring grinding device can be met through reasonable selection, but the manual chuck is not beneficial to realizing automatic production, so that the chuck is more preferentially an automatic chuck, and when the chuck adopts the automatic chuck, attention is paid to the fact that a telescopic shaft is arranged in the main shaft and a rotary oil cylinder for driving the automatic chuck cannot be arranged, so that the automatic chuck is a front-mounted hollow pneumatic chuck or a front-mounted hollow hydraulic chuck without additionally arranging the rotary oil cylinder in the main shaft, and the front-mounted hollow pneumatic chuck and the front-mounted hollow hydraulic chuck are common devices in the prior art.

Referring to fig. 5 and 18, in this embodiment, the inner support chuck 15 having four inner support flaps 19 is taken as an example, and the matching structure of the inner support chuck 15 and the telescopic shaft 11 will be described in further detail:

The front end side wall of the telescopic shaft 11 is provided with a plurality of inclined T-shaped grooves 111 which are equal to the inner supporting petals 19, the inclined T-shaped grooves 111 extend forwards and backwards in an inclined mode, the front ends of the inclined T-shaped grooves 111 are close to the central shaft of the telescopic shaft 11, and the rear ends of the inclined T-shaped grooves 111 are far away from the central shaft of the telescopic shaft 11; the inner support petals 19 are fixedly provided with T-shaped sliding blocks 191 which are in sliding fit with the inclined T-shaped grooves 111, and the inclined T-shaped grooves 111 are in one-to-one sliding fit with the T-shaped sliding blocks 191, so that the inner support petals 19 are fixedly arranged around the telescopic shaft 11 in a sliding manner; the first plugging part 17 is fixed at the front end of the telescopic shaft 11 and plugs the front end of the inclined T-shaped groove 111, so that the T-shaped slider 191 is prevented from slipping out of the front end of the inclined T-shaped groove 111; the elastic piece is an ejection spring 21 sleeved on the telescopic shaft 11 and positioned at the rear side of the inner supporting petals 19, and the ejection spring 21 pushes all the inner supporting petals 19 to synchronously move forwards through an ejection ring 18 sleeved on the telescopic shaft 11.

Referring to fig. 1,2 and 13, in this embodiment, the top shaft 6 and the second driving device 13 may have the following specific structures:

The top shaft 6 is supported by a shaft seat 8 and can freely rotate, the second driving device 13 is fixed in the shaft seat 8, the second driving device 13 is an oil cylinder or an air cylinder, and a telescopic rod of the second driving device 13 is rotatably connected with the front end of the top shaft 6; furthermore, the shaft seat 8 is supported by a rotating arm 7 fixed on the feed box 14, the position of the top shaft 6 can be adjusted through the rotation of the rotating arm 7, the top shaft 6 is adjusted to a position far away from a processing center shaft when the bearing ring 22 is clamped by the chuck 4 for grinding, and other parts do not need to avoid the top shaft 6 through feeding, so that the distribution of the parts on the machine body 1 can be more compact, and meanwhile, the processing efficiency is improved due to the reduction of the feeding steps of the parts.

Referring to fig. 1,2, 19 and 20, in the bearing ring grinding apparatus disclosed in this embodiment, a feeding device 5 is further included, where the feeding device 5 includes a support 30, a first telescopic arm 29 and a clamping seat 27; the support 30 is fixed on the feed box 14 or the machine body 1 and provides support for the first telescopic arm 29; the clamping seat 27 is supported by a first telescopic arm 29 and can move in the vertical direction of the main shaft 12, two vertically arranged side plates for limiting two end faces of the bearing ring 22 are fixed on the clamping seat 27, the two side plates are of hollow structures, a spring piece 28 for clamping the outer circular face of the bearing ring 22 is arranged between the two side plates, one end of the clamping seat 27 is an open end 26, the bearing ring 22 can be clamped into the clamping seat 27 through the open end 26, and can also be removed from the clamping seat 27 through the open end 26;

As shown in fig. 21 and 22, when the first telescopic arm 29 is in the extended state, the first insertion portion and the second insertion portion can be inserted and engaged through the two side plates, and the inner support chuck 15 can clamp and fix the bearing ring 22 in the clamping seat 27, and when the first telescopic arm 29 is retracted, the bearing ring 22 is separated from the open end 26 of the clamping seat 27, and the clamping seat 27 is moved to a position away from the machining center axis so as not to interfere with the subsequent grinding of the bearing ring.

As shown in fig. 21, based on the setting of the feeding device, on one hand, after the bearing ring 22 is clamped into the clamping seat 27, the feeding device 5 can send the bearing ring 22 to a predetermined station, and the inner support clamping head 15 is matched with the clamping seat 27, so that the clamping operation of the bearing ring 22 can be more efficiently completed, and the processing efficiency is improved; on the other hand, the clamping seat 27 can limit the axial position of the bearing ring 22, thereby having the function of axial positioning, and simultaneously, the central axis of the bearing ring 22 always tends to be horizontal under the limit action of the two side plates, which is helpful for improving the accuracy of the self-centering function of the inner support chuck 15.

Referring to fig. 19, 22 and 23, after the inner support chuck 15 completes the clamping of the bearing ring 22 based on the feeding device, when the first telescopic arm 29 retracts, the clamping seat 27 necessarily applies a certain radial acting force to the inner support chuck 15, if no interference occurs, the telescopic shaft 11 and the top shaft 6 are easily bent and deformed over time, so that the working stability and the working accuracy are affected, and aiming at the technical problem, the embodiment further has the following improvement measures:

The feeding device further comprises a second telescopic arm 31 and a top supporting frame 32, the second telescopic arm 31 is supported by the support 30, the top supporting frame 32 is supported by the second telescopic arm 31 and can move in the vertical direction of the main shaft, and the top supporting frame 32 and the clamping seat 27 are positioned on the same side of the telescopic shaft 11; when the second telescopic arm 31 is in the extended state, the top frame 32 is simultaneously abutted against the telescopic shaft 11 and the top shaft 6, and when the second telescopic arm 31 is retracted, the top frame 32 is moved to a position away from the machining center shaft so as not to interfere with the subsequent grinding of the bearing ring.

Thus, as shown in fig. 22 and 23, when the inner support clip 15 completes the clamping of the bearing ring 22 and the clamping seat 27 is retracted, the top support 32 can provide a supporting effect for the telescopic shaft 11 and the top shaft 6, so as to avoid the bending deformation of the telescopic shaft 11 and the top shaft 6.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Claims (10)

1. The bearing ring grinding equipment comprises a machine body, a main shaft box and a grinding unit, wherein the main shaft box and the grinding unit are arranged on the machine body; the main shaft box is supported by a feed box and can move forwards and backwards, and a main shaft extending forwards and backwards is fixed on the main shaft box; the method is characterized in that: the telescopic shaft synchronously rotates along with the main shaft and can stretch and move at the front end of the main shaft, the stretching amount of the telescopic shaft is regulated by a first driving device, the front end of the telescopic shaft is fixedly provided with a first inserting part and an inner supporting chuck, and the front end of the main shaft is provided with a containing cavity for containing the first inserting part and the inner supporting chuck; the front side of the main shaft is fixed with a hollow chuck which can self-center, and the hollow part is used for the first inserting part and the inner supporting chuck to pass through; the inner support chuck is composed of a plurality of inner support petals which are axisymmetrically distributed around the telescopic shaft and can slide back and forth, and elastic pieces for driving the inner support petals to reset forward, and the inner support petals move backward and move radially outwards along the telescopic shaft; the feeding box is fixedly provided with a top shaft which is positioned at the front side of the telescopic shaft and can freely rotate, and a second driving device for adjusting the axial position of the top shaft, and the rear end of the top shaft is provided with a second inserting part; the central axes of the main shaft, the chuck, the telescopic shaft and the top shaft are coincident; the first plug-in part and the second plug-in part can be in plug-in fit, and the inner supporting valve is pushed by the top shaft to move backwards in the plug-in fit process; the grinding unit comprises a grinding device for carrying out external grinding, end face grinding and internal grinding on the bearing ring.

2. Bearing ring grinding apparatus according to claim 1, characterized in that: the main shaft is internally provided with a shaft hole along a central shaft, and the telescopic shaft is positioned in the shaft hole and can move back and forth along the shaft hole; one of the main shaft and the telescopic shaft is provided with an axially extending chute, and the other is fixed with a sliding key capable of sliding back and forth along the chute.

3. Bearing ring grinding apparatus according to claim 1, characterized in that: the first driving device is an oil cylinder or an air cylinder and is positioned at the rear side of the main shaft, the cylinder body of the first driving device is fixedly connected with the main shaft box, and the telescopic rod of the first driving device is rotatably connected with the telescopic shaft through the rotating head.

4. Bearing ring grinding apparatus according to claim 1, characterized in that: the chuck is a front hollow air chuck or a front hollow hydraulic chuck.

5. Bearing ring grinding apparatus according to claim 1, characterized in that: the side wall of the front end of the telescopic shaft is provided with inclined T-shaped grooves which are equal to the inner supporting petals in number; the inclined T-shaped groove extends forwards and backwards in an inclined mode, the front end of the inclined T-shaped groove is close to the central shaft of the telescopic shaft, and the rear end of the inclined T-shaped groove is far away from the central shaft of the telescopic shaft; a T-shaped sliding block which is in sliding fit with the inclined T-shaped groove is fixed on the inner supporting valve; the first plug-in part is fixed at the front end of the telescopic shaft and plugs the front end of the inclined T-shaped groove; the elastic piece is an ejection spring sleeved on the telescopic shaft and positioned at the rear side of the inner supporting valve, and the ejection spring pushes all the inner supporting valve to synchronously move forward through an ejection ring.

6. Bearing ring grinding apparatus according to claim 1, characterized in that: the top shaft is supported by a shaft seat and can freely rotate, the second driving device is fixed in the shaft seat, the second driving device is an oil cylinder or an air cylinder, and a telescopic rod of the second driving device is rotationally connected with the front end of the top shaft; the axle seat is supported by a rotating arm fixed on the feed box.

7. Bearing ring grinding apparatus according to claim 1, characterized in that: the working states of the grinding devices in the spindle box, the feed box, the first driving device, the second driving device and the grinding unit are regulated and controlled by a control unit.

8. Bearing ring grinding apparatus according to claim 1, characterized in that: still include a loading attachment, loading attachment includes a block solid seat, block solid seat by a first flexible arm support and can be in the vertical direction mobile position of main shaft, be fixed with two perpendicular curb plates that are used for carrying out spacing to bearing ring both ends face of putting on the block solid seat, both sides board is hollow out construction, is equipped with the spring leaf that is used for carrying out the card solid to bearing ring outer disc between the board of both sides, block solid seat one end is the open end, the bearing ring can be gone into block solid seat by the open end card in, also can shift out in the block solid seat from the block solid seat through the open end.

9. The bearing ring grinding apparatus as claimed in claim 8, wherein: the feeding device further comprises a top supporting frame which is supported by a second telescopic arm and can move in the vertical direction of the main shaft, the top supporting frame and the clamping seat are positioned on the same side of the telescopic shaft, and when the second telescopic arm stretches, the top supporting frame can be simultaneously abutted to the telescopic shaft and the top shaft.

10. A method of grinding a bearing ring with the bearing ring grinding apparatus of claim 1, comprising the steps of:

(1) The bearing sleeve is sleeved on the inner supporting clamp head, the telescopic shaft is close to the jacking shaft, the first inserting part is in inserting fit with the second inserting part, the inner supporting clamp head tightly jacks the inner wall of the bearing ring, and the clamping operation of the bearing ring is completed;

(2) After the bearing ring is clamped and fixed by the inner support chuck, finishing external circle grinding and end face grinding by utilizing a grinding device in a grinding unit;

(3) After finishing the excircle grinding and the end face grinding of the bearing ring, enabling the telescopic shaft and the top shaft to synchronously move backwards until the bearing ring reaches the inside of the chuck, and clamping and fixing the bearing ring by using the chuck; the top shaft moves forwards, and the telescopic shaft moves backwards until the first inserting part and the inner supporting chuck retract into the accommodating cavity;

(4) And after the bearing ring is clamped and fixed by the chuck, finishing internal grinding by utilizing a grinding device in the grinding unit.