阅读说明：本技术 一种深沟球轴承内圈加工装置及方法 (Deep groove ball bearing inner ring machining device and method ) 是由 郑得印 顾利钧 蒋晓亮 耿康 蔡世英 于 2021-10-14 设计创作，主要内容包括：本发明公开了一种深沟球轴承内圈加工装置,包括夹持机构、内研磨机构和外研磨机构,所述夹持机构包括转筒,转筒通过轴承转动的连接第一机架,转筒通过传动机构连接第一电机的输出端；转筒的左端设有多个用于夹持工件的夹头,夹头整体呈弧形,转筒上设有用于驱动夹头沿转筒的径向移动的第一直线驱动机构；内研磨机构包括设于转筒内部的内磨盘,内磨盘与转筒同轴设置,内磨盘的外周设有多个内磨头,内磨头的外面为弧面,内磨盘上设有用于驱动内磨头沿内磨盘的径向移动的第三直线驱动机构；本发明通过内外双研磨的方法对轴承内圈工件的滚珠槽和油槽共同的进行磨削加工,通过内外研磨头的压力控制能够尽可能的使轴承内圈工件内外受压平衡,降低轴承内圈工件外圆面加工的异常形变。(The invention discloses a deep groove ball bearing inner ring processing device which comprises a clamping mechanism, an inner grinding mechanism and an outer grinding mechanism, wherein the clamping mechanism comprises a rotary drum, the rotary drum is connected with a first rack through a bearing in a rotating mode, and the rotary drum is connected with the output end of a first motor through a transmission mechanism; the left end of the rotary drum is provided with a plurality of chucks for clamping workpieces, the chucks are integrally arc-shaped, and the rotary drum is provided with a first linear driving mechanism for driving the chucks to move along the radial direction of the rotary drum; the inner grinding mechanism comprises an inner grinding disc arranged in the rotary drum, the inner grinding disc and the rotary drum are coaxially arranged, a plurality of inner grinding heads are arranged on the periphery of the inner grinding disc, the outer surface of each inner grinding head is an arc surface, and a third linear driving mechanism for driving the inner grinding heads to move along the radial direction of the inner grinding disc is arranged on the inner grinding disc; the invention carries out grinding processing on the ball groove and the oil groove of the bearing inner ring workpiece together by an internal and external double grinding method, can balance the internal and external pressures of the bearing inner ring workpiece as far as possible by controlling the pressure of the internal and external grinding heads, and reduces the abnormal deformation of the processing of the outer circular surface of the bearing inner ring workpiece.)

1. The deep groove ball bearing inner ring machining device is characterized by comprising a clamping mechanism, an inner grinding mechanism and an outer grinding mechanism, wherein the clamping mechanism comprises a rotary drum, the rotary drum is rotatably connected with a first rack through a bearing, and the rotary drum is connected with the output end of a first motor through a transmission mechanism;

the left end of the rotary drum is provided with a plurality of chucks for clamping workpieces, the chucks are integrally arc-shaped, and the rotary drum is provided with a first linear driving mechanism for driving the chucks to move along the radial direction of the rotary drum;

the inner grinding mechanism comprises an inner grinding disc arranged in the rotary drum, the inner grinding disc and the rotary drum are coaxially arranged, a plurality of inner grinding heads are arranged on the periphery of the inner grinding disc, the outer surface of each inner grinding head is an arc surface, and a third linear driving mechanism for driving the inner grinding heads to move along the radial direction of the inner grinding disc is arranged on the inner grinding disc;

the right end of the inner grinding disc is connected with a guide rod, the guide rod is connected with the first rack through a linear bearing, and the right end of the guide rod is connected with a fourth linear driving mechanism for driving the inner grinding disc to move along the axis of the rotary drum;

the outer grinding mechanism comprises an outer grinding disc with the inner diameter larger than the rotary drum, the outer grinding disc is fixedly connected with the second rack, the outer grinding disc is integrally annular, the outer grinding disc and the rotary drum are coaxially arranged, a plurality of outer grinding heads are arranged on the inner periphery of the outer grinding disc, the inner faces of the outer grinding heads are arc-shaped, and a fifth linear driving mechanism used for driving the outer grinding heads to move along the radial direction of the rotary drum is arranged on the outer grinding disc.

2. The deep groove ball bearing inner ring machining device of claim 1, wherein the transmission mechanism of the rotary drum connected with the first motor comprises a first gear ring and a first gear, wherein the first gear ring is fixedly arranged on the rotary drum, the first gear ring is meshed with the first gear, and the first gear is connected with the output end of the first motor.

3. The deep groove ball bearing inner ring machining device is characterized in that an output end of the first motor is connected with an input end of a transmission, and an output end of the transmission is connected with a first gear.

4. The deep groove ball bearing inner ring machining device of claim 1, wherein a plurality of chucks on the rotating drum are distributed in a uniform annular array.

5. The deep groove ball bearing inner ring machining device of claim 1, wherein the first linear driving mechanism, the third linear driving mechanism and the fifth linear driving mechanism are air cylinders or hydraulic cylinders.

6. The deep groove ball bearing inner ring machining device of claim 1, wherein the bottom of the first machine frame is connected to a base through a slide rail arranged along an axial direction of the drum, and a second linear driving mechanism for driving the first machine frame to move along the axial direction of the drum is arranged on the base.

7. The deep groove ball bearing inner ring machining device of claim 6, wherein the second frame is connected to the base through a slide rail arranged along an axial direction of the drum, and a sixth linear driving mechanism for driving the second frame to move along the axial direction of the drum is arranged on the base.

8. The deep groove ball bearing inner ring machining device of claim 1, wherein the second frame is connected to a base through a slide rail arranged along an axial direction of the drum, and a sixth linear driving mechanism for driving the second frame to move along the axial direction of the drum is arranged on the base.

9. The machining method of the deep groove ball bearing inner ring machining device of claim 1 is characterized by comprising the following steps of:

step S1, firstly, moving the workpiece to be processed to the left end of the rotary drum, and then driving the chuck to synchronously move inwards through the first linear driving mechanism, so that the chuck clamps and fixes the workpiece;

step S2, driving the first frame to move leftwards, and enabling the ball groove to be processed of the workpiece to move to the position of the outer grinding head;

step S3, driving the inner grinding disc to move leftwards, and enabling the oil groove to be machined in the inner periphery of the workpiece to move to the position of the inner grinding head;

step S4, driving the inner grinding head to move outwards to enable the inner grinding head to contact the inner periphery of the workpiece;

step S5, driving the outer grinding head to move inwards to enable the outer grinding head to contact the periphery of the workpiece;

step S6, driving the rotating drum to rotate, driving the workpiece to rotate by the rotating drum, enabling the workpiece to generate relative motion with the inner grinding head and the outer grinding head, and processing the ball groove and the oil groove of the workpiece through friction;

the pressure born by the inner grinding head and the pressure born by the outer grinding head are detected through a sensor, the pressure born by the inner grinding head is N, the pressure born by the outer grinding head is W, both N and W need to be greater than a first threshold value, and the first threshold value is the minimum value of the pressure required by processing;

the positions of the inner grinding head and the outer grinding head are required to be continuously adjusted in the machining process so as to be suitable for the increase of the grinding amount, N is equal to W in the moving process of the inner grinding head and the outer grinding head until the grinding amount of the ball groove or the oil groove reaches 80% of the machining requirement, if the grinding amount of the ball groove reaches 80% of the machining requirement, W is reduced, and the value of N-W is designed based on the grinding amount of the oil groove at the moment so as to achieve the result that the ball groove and the oil groove are simultaneously machined;

and if the grinding amount of the oil groove reaches 80% of the machining requirement, reducing W, and designing the value of W-N based on the grinding amount of the ball groove at the moment so as to achieve the result that the ball groove and the oil groove are machined at the same time.

Technical Field

The invention relates to the technical field of machining, in particular to a deep groove ball bearing inner ring machining device.

Background

The bearing failure is caused by various factors, according to the statistics of relevant foreign data, the bearing failure caused by insufficient lubrication and improper lubrication accounts for about 37%, and the bearing failure caused by pollution accounts for about 21%. Therefore, adopting a correct oil supply arrangement and ensuring the oil to be clean is one of the necessary means for ensuring the stable and normal operation of the system. The oil supply arrangement commonly used at present comprises three structures, one is a side-spraying type oil supply arrangement, the other is an impeller type radial oil-collecting ring oil supply arrangement, and the other is a common under-ring lubrication oil supply arrangement. Wherein, the common under-ring lubrication and the impeller type radial oil collecting ring structure belong to the under-ring lubrication mode. The side-spraying type oil supply mode has a simple structure, but is easy to pollute, large in energy loss, insufficient in lubrication and low in oil collection efficiency. Therefore, more and more engine main shaft bearings tend to choose the under-ring lubrication structure. When a ball groove of the outer circular surface of a bearing inner ring in the prior art is machined, a bearing inner ring workpiece is only stressed on one side, and abnormal deformation except for machining requirements is caused.

Disclosure of Invention

The invention provides a deep groove ball bearing inner ring processing device, which solves the technical problem that abnormal deformation except for processing requirements is caused because only one side of a bearing inner ring workpiece is stressed when a ball groove of the outer circle surface of a bearing inner ring is processed in the related technology.

According to one aspect of the invention, the deep groove ball bearing inner ring processing device comprises a clamping mechanism, an inner grinding mechanism and an outer grinding mechanism, wherein the clamping mechanism comprises a rotary drum, the rotary drum is rotatably connected with a first rack through a bearing, and the rotary drum is connected with the output end of a first motor through a transmission mechanism;

the left end of the rotary drum is provided with a plurality of chucks for clamping workpieces, the chucks are integrally arc-shaped, and the rotary drum is provided with a first linear driving mechanism for driving the chucks to move along the radial direction of the rotary drum;

the inner grinding mechanism comprises an inner grinding disc arranged in the rotary drum, the inner grinding disc and the rotary drum are coaxially arranged, a plurality of inner grinding heads are arranged on the periphery of the inner grinding disc, the outer surface of each inner grinding head is an arc surface, and a third linear driving mechanism for driving the inner grinding heads to move along the radial direction of the inner grinding disc is arranged on the inner grinding disc;

the right end of the inner grinding disc is connected with a guide rod, the guide rod is connected with the first rack through a linear bearing, and the right end of the guide rod is connected with a fourth linear driving mechanism for driving the inner grinding disc to move along the axis of the rotary drum;

the outer grinding mechanism comprises an outer grinding disc with the inner diameter larger than the rotary drum, the outer grinding disc is fixedly connected with the second rack, the outer grinding disc is integrally annular, the outer grinding disc and the rotary drum are coaxially arranged, a plurality of outer grinding heads are arranged on the inner periphery of the outer grinding disc, the inner faces of the outer grinding heads are arc-shaped, and a fifth linear driving mechanism used for driving the outer grinding heads to move along the radial direction of the rotary drum is arranged on the outer grinding disc.

Furthermore, the transmission mechanism of the first motor connected to the rotating drum comprises a first gear ring and a first gear, wherein the first gear ring is fixedly arranged on the rotating drum, the first gear ring is meshed with the first gear, and the first gear is connected with the output end of the first motor.

Further, the output end of the first motor is connected with the input end of the transmission, and the output end of the transmission is connected with the first gear.

Further, the plurality of chucks on the rotating drum are distributed in a uniform annular array.

Further, the first linear driving mechanism, the third linear driving mechanism and the fifth linear driving mechanism adopt air cylinders or hydraulic cylinders.

Furthermore, the bottom of the first rack is connected with the base through a sliding rail arranged along the axial direction of the rotary drum, and a second linear driving mechanism used for driving the first rack to move along the axial direction of the rotary drum is arranged on the base.

Furthermore, the second rack is connected with the base through a sliding rail arranged along the axial direction of the rotary drum, and a sixth linear driving mechanism used for driving the second rack to move along the axial direction of the rotary drum is arranged on the base.

Furthermore, the second rack is connected with the base through a sliding rail arranged along the axial direction of the rotary drum, and a sixth linear driving mechanism used for driving the second rack to move along the axial direction of the rotary drum is arranged on the base.

According to one aspect of the invention, the processing method of the deep groove ball bearing inner ring processing device comprises the following steps:

step S1, firstly, moving the workpiece to be processed to the left end of the rotary drum, and then driving the chuck to synchronously move inwards through the first linear driving mechanism, so that the chuck clamps and fixes the workpiece;

step S2, driving the first frame to move leftwards, and enabling the ball groove to be processed of the workpiece to move to the position of the outer grinding head;

step S3, driving the inner grinding disc to move leftwards, and enabling the oil groove to be machined in the inner periphery of the workpiece to move to the position of the inner grinding head;

step S4, driving the inner grinding head to move outwards to enable the inner grinding head to contact the inner periphery of the workpiece;

step S5, driving the outer grinding head to move inwards to enable the outer grinding head to contact the periphery of the workpiece;

step S6, driving the rotating drum to rotate, driving the workpiece to rotate by the rotating drum, enabling the workpiece to generate relative motion with the inner grinding head and the outer grinding head, and processing the ball groove and the oil groove of the workpiece through friction;

the pressure born by the inner grinding head and the pressure born by the outer grinding head are detected through a sensor, the pressure born by the inner grinding head is N, the pressure born by the outer grinding head is W, both N and W need to be greater than a first threshold value, and the first threshold value is the minimum value of the pressure required by processing;

the positions of the inner grinding head and the outer grinding head are required to be continuously adjusted in the machining process so as to be suitable for the increase of the grinding amount, N is equal to W in the moving process of the inner grinding head and the outer grinding head until the grinding amount of the ball groove or the oil groove reaches 80% of the machining requirement, if the grinding amount of the ball groove reaches 80% of the machining requirement, W is reduced, and the value of N-W is designed based on the grinding amount of the oil groove at the moment so as to achieve the result that the ball groove and the oil groove are simultaneously machined;

and if the grinding amount of the oil groove reaches 80% of the machining requirement, reducing W, and designing the value of W-N based on the grinding amount of the ball groove at the moment so as to achieve the result that the ball groove and the oil groove are machined at the same time.

The invention has the beneficial effects that:

the invention carries out grinding processing on the ball groove and the oil groove of the bearing inner ring workpiece together by an internal and external double grinding method, can balance the internal and external pressures of the bearing inner ring workpiece as far as possible by controlling the pressure of the internal and external grinding heads, and reduces the abnormal deformation of the processing of the outer circular surface of the bearing inner ring workpiece.

Drawings

Fig. 1 is a schematic structural diagram of a deep groove ball bearing inner ring machining device according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a transmission mechanism according to a first embodiment of the present invention;

FIG. 3 is a schematic structural diagram of an internal grinding mechanism according to a first embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a polishing mechanism according to a first embodiment of the present invention;

fig. 5 is a flowchart of a processing method of a deep groove ball bearing inner ring processing device according to a first embodiment of the present invention;

fig. 6 is a schematic structural diagram of a deep groove ball bearing inner ring machining device according to a second embodiment of the present invention;

fig. 7 is a schematic structural diagram of a deep groove ball bearing inner ring machining device according to a third embodiment of the present invention.

In the figure: the grinding machine comprises a rotary drum 101, a first frame 102, a first motor 103, a first gear ring 104, a first gear 105, a chuck 106, an inner grinding disc 107, an inner grinding head 108, an outer grinding disc 109, a second frame 110, an outer grinding head 111, a second linear driving mechanism 112, a fourth linear driving mechanism 113, a sixth linear driving mechanism 114 and a base 200.

Detailed Description

The subject matter described herein will now be discussed with reference to example embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and thereby implement the subject matter described herein, and are not intended to limit the scope, applicability, or examples set forth in the claims. Changes may be made in the function and arrangement of elements discussed without departing from the scope of the disclosure. Various examples may omit, substitute, or add various procedures or components as needed. In addition, features described with respect to some examples may also be combined in other examples.

Example one

As shown in fig. 1-4, a deep groove ball bearing inner ring processing device comprises a clamping mechanism, an inner grinding mechanism and an outer grinding mechanism, wherein the clamping mechanism comprises a rotating drum 101, the rotating drum 101 is rotatably connected with a first frame 102 through a bearing, and the rotating drum 101 is connected with an output end of a first motor 103 through a transmission mechanism;

the left end of the rotary drum 101 is provided with a plurality of chucks 106 for clamping workpieces, the chucks 106 are integrally arc-shaped, and the rotary drum 101 is provided with a first linear driving mechanism for driving the chucks 106 to move along the radial direction of the rotary drum 101;

the bottom of the first frame 102 is connected with the base 200 through a sliding rail arranged along the axial direction of the rotary drum 101, and the base 200 is provided with a second linear driving mechanism 112 for driving the first frame 102 to move along the axial direction of the rotary drum 101;

the inner grinding mechanism comprises an inner grinding disc 107 arranged inside the rotary drum 101, the inner grinding disc 107 and the rotary drum 101 are coaxially arranged, a plurality of inner grinding heads 108 are arranged on the periphery of the inner grinding disc 107, the outer surface of each inner grinding head 108 is an arc surface, and a third linear driving mechanism for driving the inner grinding heads 108 to move along the radial direction of the inner grinding disc 107 is arranged on the inner grinding disc 107;

the right end of the inner grinding disc 107 is connected with a guide rod, the guide rod is connected with the first machine frame 102 through a linear bearing, and the right end of the guide rod is connected with a fourth linear driving mechanism 113 for driving the inner grinding disc 107 to move along the axis of the rotary drum 101;

the outer grinding mechanism comprises an outer grinding disc 109 with the inner diameter larger than that of the rotary drum 101, the outer grinding disc 109 is fixedly connected with a second rack 110, the outer grinding disc 109 is annular as a whole, the outer grinding disc 109 and the rotary drum 101 are coaxially arranged, a plurality of outer grinding heads 111 are arranged on the inner periphery of the outer grinding disc 109, the inner surfaces of the outer grinding heads 111 are arc-shaped, and a fifth linear driving mechanism for driving the outer grinding heads 111 to move along the radial direction of the rotary drum 101 is arranged on the outer grinding disc 109;

in one embodiment of the present invention, the transmission mechanism of the drum 101 connected to the first motor 103 comprises a first gear ring 104 and a first gear 105, wherein the first gear ring 104 is fixedly arranged on the drum 101, the first gear ring 104 is engaged with the first gear 105, and the first gear 105 is connected to the output end of the first motor 103. The first motor 103 drives the first gear 105 to rotate, and the first gear 105 drives the first ring gear 104 engaged therewith to rotate, thereby driving the drum 101 to rotate.

Further, the output end of the first motor 103 is connected with the input end of the transmission, and the output end of the transmission is connected with the first gear 105.

In one embodiment of the invention, the plurality of chucks 106 on the rotating drum 101 are distributed in a uniform annular array.

In one embodiment of the present invention, the first linear driving mechanism, the third linear driving mechanism and the fifth linear driving mechanism adopt air cylinders or hydraulic cylinders.

In one embodiment of the present invention, the second linear driving mechanism 112 and the fourth linear driving mechanism 113 employ a pneumatic cylinder or a hydraulic cylinder or a linear motor or a lead screw linear driving mechanism.

As shown in fig. 5, based on the above device for machining the inner ring of the deep groove ball bearing, the invention provides a method for machining the inner ring of the deep groove ball bearing, which comprises the following steps:

step S1, first, moving the workpiece to be processed to the left end of the rotating cylinder 101, and then driving the chuck 106 to synchronously move inward by the first linear driving mechanism, so that the chuck 106 clamps and fixes the workpiece;

step S2, driving the first frame 102 to move leftwards, and moving the ball groove to be processed of the workpiece to the position of the outer grinding head 111;

step S3, driving the inner grinding disc 107 to move leftwards, and enabling the oil groove to be machined in the inner periphery of the workpiece to move to the position of the inner grinding head 108;

step S4, driving the inner grinding heads 108 to move outward, so that the inner grinding heads 108 contact the inner circumference of the workpiece;

step S5, driving the outer grinding stones 111 to move inward, so that the outer grinding stones 111 contact the outer periphery of the workpiece;

step S6, the rotating drum 101 is driven to rotate, the rotating drum 101 drives the workpiece to rotate, relative motion is generated between the workpiece and the inner grinding head 108 and the outer grinding head 111, and the ball grooves and the oil grooves of the workpiece are machined through friction;

the pressure born by the inner grinding head 108 and the outer grinding head 111 is detected through a sensor, the pressure born by the inner grinding head 108 is N, the pressure born by the outer grinding head 111 is W, both N and W need to be greater than a first threshold value, and the first threshold value is the minimum value of the pressure required by processing;

the positions of the inner grinding head 108 and the outer grinding head 111 need to be continuously adjusted in the machining process so as to be suitable for the increase of the grinding amount, N is equal to W in the moving process of the inner grinding head 108 and the outer grinding head 111 until the grinding amount of the ball groove or the oil groove reaches 80% of the machining requirement, if the grinding amount of the ball groove reaches 80% of the machining requirement, W is reduced, and the value of N-W is designed based on the grinding amount of the oil groove at the moment so as to achieve the result that the ball groove and the oil groove are simultaneously machined;

if the grinding amount of the oil groove reaches 80% of the machining requirement, reducing W, and designing a value of W-N based on the grinding amount of the ball groove at the moment so as to achieve the result that the ball groove and the oil groove are machined simultaneously;

for example N-W-grinding volume percentage of ball grooves/grinding volume percentage of oil grooves K; k is a set constant and is determined based on historical data or the grinding speed of the grinding head on the workpiece.

In the above steps, there may be an error in the calculation, and if the grinding amount of the ball groove or the oil groove meets the processing requirement, the inner grinding head 108 or the outer grinding head 111 is correspondingly driven to be separated from the workpiece, so as to avoid excessive processing.

In the above step, the gripping position of the chuck 106 of the drum 101 with respect to the workpiece does not interfere with the ball grooves.

Example two

As shown in fig. 6, unlike the first embodiment, in the present embodiment, the second frame 110 is connected to the base 200 by a slide rail arranged along the axial direction of the drum 101, and the base 200 is provided with a sixth linear driving mechanism 114 for driving the second frame 110 to move along the axial direction of the drum 101.

In this embodiment, the first frame 102 is fixedly connected to the base 200.

EXAMPLE III

As shown in fig. 7, different from the first embodiment and the second embodiment, in the present embodiment, the bottom of the first frame 102 is connected to the base 200 through a slide rail disposed along the axial direction of the drum 101, and the base 200 is provided with a second linear driving mechanism 112 for driving the first frame 102 to move along the axial direction of the drum 101; the second frame 110 is connected to the base 200 through a slide rail arranged along the axial direction of the drum 101, and the base 200 is provided with a sixth linear driving mechanism 114 for driving the second frame 110 to move along the axial direction of the drum 101.

Both are arranged as movable structures, so that the phenomenon that one mechanism moves for too long distance can be avoided.

The embodiments of the present invention have been described with reference to the drawings, but the present invention is not limited to the above-mentioned specific embodiments, which are only illustrative and not restrictive, and those skilled in the art can make many forms without departing from the spirit and scope of the present invention and the protection scope of the claims.