CN114714239A - Multi-bin ultra-precision centrifugal polishing and grinding device and method for surface of bearing rolling body - Google Patents

Abstract

The utility model provides a many storehouses super precision centrifugation polishing and grinding device and method for bearing rolling body surface, belongs to machine part surface finishing processing technology field, and this processingequipment is including alone storehouse, centrifugal disc skeleton, gyration dish and back shaft, only storehouse outside adopts hexagonal prism structure, and the inner chamber of different shapes of internal design is loaded into bearing rolling element, oily medium and dry-type light particle medium, only storehouse is along circumference evenly distributed to along the installation of axial straight line fix on the centrifugal disc skeleton, only storehouse axis and centrifugal disc skeleton pivot exist and confirm the offset distance, the centrifugal disc skeleton is along revolving the back shaft axis and is the revolution rotational speed asNThe rotational speed of rotation isnThe dry type light particle medium pre-loaded into the single bin generates certain relative motion with the surface of the bearing rolling body to realize the surface of the bearing rolling bodyThe process is simple, easy to implement, low in cost, green and environment-friendly, and can realize large-batch superfinishing on the surface of the bearing rolling body.

Description

A multi-chamber ultra-precision centrifugal polishing device and method for bearing rolling element surface

technical field

The invention belongs to the technical field of surface finishing of bearing rolling elements, and in particular relates to a multi-silo ultra-precision centrifugal polishing device and method for the surface of bearing rolling elements.

Background technique

In precision equipment, bearings are essential core basic components, which play the role of supporting mechanical rotating bodies, reducing motion friction and ensuring rotation accuracy. They are called mechanical "joints". Bearing rolling elements are one of the key components of bearings. First, its surface quality seriously affects the working performance and service life of the bearing.

Nowadays, there are different processing methods for different bearing rolling elements. The precision ball processing technology mainly includes single-disk drive V-groove processing, single-disk drive conical disk processing, double turntable eccentric processing, three-turntable drive processing, four-axis drive processing, Magnetic fluid machining, non-magnetic fluid machining, variable curvature groove sphere machining, etc. Surface machining methods for cylindrical rollers include centerless grinding, centerless superfinishing, centering reciprocating superfinishing, electrochemical mechanical polishing, magnetic fluid grinding, Double-plane ultra-fine grinding, shear thickening polishing, etc., each processing method can achieve rolling element surface finishing to a certain extent, and has its own advantages, but each processing method is not universal, and can only be used for Surface processing of a certain rolling element.

Yuan Julong from Zhejiang University of Technology proposed a semi-fixed abrasive polishing disc (ZL201910150346.5) for the ultra-precision polishing of cylindrical surfaces of cylindrical rollers based on traditional double-disc grinding and polishing equipment. This method can simultaneously increase the size of cylindrical rollers. Accuracy and roughness grade, the surface roughness is reduced from about 72nm to about 15.54nm, and the roundness is reduced from about 0.96μm to about 0.40μm. This process is currently only suitable for small and medium batch processing, and is only suitable for roller cylindrical surface finishing processing.

Based on this, it is an urgent problem to find a high-universal, simultaneous realization of various rolling elements and the full surface of rolling elements, and a large-scale finishing technology.

SUMMARY OF THE INVENTION

The invention provides a multi-silo ultra-precise centrifugal polishing device and method for the surface of the bearing rolling element, the purpose of which is to realize the large-scale, full-scale production of the bearing rolling element surface by adopting a spatially distributed single-silo structure and rationally adjusting the processing parameters. Orientation and consistent finishing, to meet its high-efficiency finishing needs.

In order to achieve the above purpose, the present invention provides a multi-silo ultra-precise centrifugal polishing device for the surface of the bearing rolling body, which includes a plurality of individual chambers, the individual chambers are pre-loaded with processing medium, the individual chambers are fixed on the centrifugal disc skeleton, and the centrifugal The disk skeleton does planetary motion with revolution of N and rotation of n .

Preferably, the single chamber is of a split structure, including a single chamber body, an end cover screw and a single chamber end cover.

Preferably, the single bins are evenly distributed in the circumferential direction, and are sequentially fixed and installed on the centrifugal disc skeleton. Press down.

Preferably, the installation frame includes a lower installation plate, a compression nut, an upper installation plate and a fixing nut, the lower installation plate is flatly pressed on the single-silo body, the upper installation plate is installed on the frame of the centrifugal disc, and the upper installation plate is adjusted by the compression nut. The distance between the plate and the installation lower plate realizes the radial compression of the single compartment, and the fastening between the installation upper plate and the installation lower plate is realized through the compression nut and the fixing nut.

Preferably, the axial adjustment mechanism includes a star-shaped handle, a set screw and a screw-in disc, the star-shaped handle is fixedly connected to the screw-in disc through the set screw, the screw-in disc and the centrifugal disc frame are connected by threads, and the star-shaped handle is screwed The handle can adjust the axial movement of the screw-in disc to realize the axial compression of the single bin.

Preferably, it also includes a processing platform, and the processing platform is provided with a bracket, a support shaft, a rotary disk, a first large pulley, a second large pulley, a first small pulley and a second small pulley, and the support shaft is fixed Connected with the first large pulley and the rotary disc, the centrifugal disc skeleton is installed on the rotary disc through the second bearing and is fixedly connected with a planetary gear, the first small pulley and the first large pulley are connected by a first belt, and the second The small pulley is connected with the first speed regulating motor and rotates with the first speed regulating motor; the second large pulley is mounted on the support shaft through a third bearing, and the second large pulley is fixedly connected with a connecting piece. The central gear is installed on the support shaft through another third bearing, the central gear drives the planetary gear to move through gear transmission, and the second small pulley and the second large pulley are connected by a second belt, and the second small belt The wheel is connected with the second speed regulating motor and rotates with the second speed regulating motor.

Preferably, the number of single warehouses is q , which is determined by formula (1),

Among them: m ₀ is the mass of the single warehouse, m ₁ is the mass of a single centrifugal disc frame, m ₂ is the mass of a single rotary disc, r is the radius of the centrifugal disc frame; R is the radius of the rotary disc; T ₁ is the first speed regulating motor , i ₁ is the transmission ratio of the first belt, t ₁ is the starting time of the first speed regulating motor, n ₁ is the rotational speed of the first speed regulating motor, r/min; T ₂ is the second speed regulating motor The starting torque of , i ₂ is the transmission ratio of the second belt, t ₂ is the starting time of the second speed regulating motor, n ₂ is the speed of the second speed regulating motor, r/min.

Preferably, the rotation speed n of the centrifugal disc frame is 150-300 r/min; the rotation speed of the rotary disc, that is, the revolution speed N of the centrifugal disc frame around the axis of the support shaft, is 150-300 r/min.

Preferably, the processing medium is a mixture of dry light granules and an oily medium, the dry light granules are walnut shells, corn cob or olive husks, the oily medium is tumbler oil, and the loading amount of the dry light granules It is 60% of the volume of the single warehouse, and the loading amount of oily medium is 5% of the mass of dry light particles.

The present invention also provides a multi-silo ultra-precision centrifugal polishing method for the surface of the bearing rolling body, comprising the following steps:

S1, adding processing medium to the single-silo body;

S2, the bearing rolling body to be processed is placed freely in the single-silo body, buried in the processing medium, covered with the single-silo end cover, and the single-silo is closed;

S3, placing the above-mentioned single bin with the processing medium and bearing rolling elements on one of the centrifugal disc skeletons;

S4, repeating steps S1-S3, placing the single bin in a groove of the centrifugal disc frame along the axial direction of the centrifugal disc frame until it is full, and pressing and fixing it on the centrifugal disc frame through the mounting frame and the star-shaped handle;

S5, repeat the steps S1-S4 until the 6 grooves on the centrifuge disc skeleton are filled with the single bin and press and fix;

S6, repeat the steps S1-S5 until the q single bins are fixed on all the centrifugal disc skeletons;

S7, adjust the rotational speed of the first speed-regulating motor, so that the rotational speed of the turntable is 150-300 r/min;

S8, adjust the rotational speed of the second speed regulating motor, so that the rotational speed of the centrifugal disc skeleton is 150-300 r/min;

S9, start the first speed control motor and the second speed control motor, and the centrifugal disc skeleton follows the first speed control motor, the first small pulley, the first large pulley, the rotary disc, the second speed control motor, the second small pulley The pulley, the second largest pulley, the sun gear, and the planetary gear do planetary motion with the revolution of N and the rotation of n , and the single warehouse fixed on it moves together with the centrifugal disc skeleton to complete the smoothing of the surface of the bearing rolling body. processing;

S10, after processing the preset time, stop the first speed regulating motor and the second speed regulating motor;

S11, disassemble the mounting frame, loosen the star handle, and remove the single compartment from the centrifugal disc frame;

S12, remove the end cover of the single warehouse, and take out the bearing rolling element.

The beneficial effects of the present invention are:

Aiming at the current state of finishing machining of the surface of the bearing rolling body, the present invention proposes a multi-silo ultra-precision centrifugal polishing device and method for the surface of the bearing rolling body. A certain amount of dry light granular medium is pre - loaded in the single bin, and multiple single bins are fixed on the centrifugal disc skeleton. The dry lightweight granular medium installed in the separate warehouse generates a certain relative motion and force on the surface of the bearing rolling element. Through reasonable adjustment of the process parameters, the surface of the bearing rolling element can be processed in all directions synchronously. On the premise of ensuring the original shape and dimensional accuracy of the rolling elements of the bearing, the invention can further improve the surface roughness of the rolling elements, avoid bumping, greatly improve the processing efficiency, and significantly improve the surface performance of the rolling elements.

Description of drawings

Fig. 1 is the front view of the multi-silo ultra-precision centrifugal polishing device of the present invention;

Fig. 2 is the sectional view of the A-A direction of the centrifugal polishing device shown in Fig. 1;

Fig. 3 is a partial cross-sectional view for the transmission of the second large pulley and the central gear at the I place in Fig. 1;

Fig. 4 is the front view of the centrifugal disc skeleton of the installation frame at II in Fig. 1 radially pressing the single bin;

Fig. 5 is the sectional view of the multi-silo structure of the centrifugal disc skeleton at III place in Fig. 2;

Figure 6 is a partial cross-sectional view of the axial adjustment mechanism at IV in Figure 4;

Fig. 7 is a partial cross-sectional view of the position of the single warehouse at V place in Fig. 5;

Figure 8 is a three-dimensional view of a centrifugal disc skeleton;

Figure 9 is a three-dimensional view of the centrifugal disc skeleton of the mounting frame radially pressing the single bin;

Figure 10 is the first configuration diagram of the single warehouse;

FIG. 11 is a cross-sectional view in the direction B-B in FIG. 10;

Figure 12 is a second configuration diagram of a single warehouse;

Figure 13 is a sectional view in the direction C-C in Figure 12;

Figure 14 is the third configuration diagram of the single warehouse;

Figure 15 is a cross-sectional view in the direction D-D in Figure 14;

Figure 16 is a comparison diagram of the surface morphology of the bearing rolling elements before and after processing;

Figure 17 is a surface view of the bearing rolling element before machining;

Fig. 18 is a surface view of the bearing rolling element after machining.

In the figure: 1-processing platform; 2-first speed regulating motor; 3-first small pulley; 4-first belt; 5-support; 6-first bearing; 7-first large pulley; 8- 2nd bearing; 9-rotary disc; 10-centrifugal disc skeleton; 11-planet gear; 12-support shaft; 13-second belt; 14-second small pulley; 15-second speed regulating motor; 16-left Side cover; 17-connecting screw; 18-sun gear; 19-second large pulley; 20-connecting piece; 21-third bearing; 22-first sleeve; 23-fastening screw; 24-second Sleeve; 25-right end cover; 26-install lower plate; 27-press nut; 28-install upper plate; 29-fix nut; 30-star handle; 31-set screw; 32-screw into the disc ; 33-end cover screws; 34-single warehouse end cover; 35-single warehouse body; 36-processing medium; 37-bearing rolling body.

Detailed ways

The technical solutions in the embodiments of the present invention are clearly and completely described with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other implementations obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

It should be noted that the structures, proportions, sizes, etc. shown in the drawings in this specification are only used to cooperate with the contents disclosed in the specification, so as to be understood and read by those who are familiar with the technology, and are not used to limit the implementation of the present invention. Restricted conditions, it does not have technical substantive significance, any structural modification, proportional relationship change or size adjustment, without affecting the effect that the present invention can produce and the purpose that can be achieved, should still fall within the present invention. To the extent that the disclosed technical content can cover, it should be noted that in this specification, relational terms such as first and second are only used to distinguish one entity from other entities, rather than Any such actual relationship or ordering between these entities must be required or implied.

The present invention provides an embodiment of a multi-chamber ultra-precision centrifugal polishing device for the surface of a bearing rolling body, comprising a plurality of individual chambers, the individual chambers are pre-loaded with a processing medium 36, and the individual chambers are fixed on the centrifugal disc skeleton 10, The centrifugal disk skeleton 10 makes a planetary motion with a revolving speed of N and an autorotation speed of n around the axis of the support shaft 12 along with the rotary disk 9 .

In this embodiment, the single chamber is a split structure, as shown in FIG. 7 , including a single chamber body 35 , an end cover screw 33 and a single chamber end cover 34 , and the single chamber body 35 is provided with the single chamber end cover 34 For the matching lap end, the two ends of the single bin end cover 34 are connected and fixed with the overlap end through the end cap screws 33 to realize the sealing of the single bin; the external configuration of the single bin adopts a hexagonal structure, and the internal configuration can adopt any shape As shown in Figure 10 and Figure 11, the shape of the inner cavity is a hexagonal prism, as shown in Figure 12 and Figure 13, and the shape of the inner cavity is a cylinder, as shown in Figure 14 and Figure 15, the shape of the inner cavity is The shape is oblate; the processing medium 36 is a mixture of dry light granules and oily medium. The loading volume is 60% of the volume of the single bin, and the loading volume of the oily medium is 5% of the mass of the dry light particles. A certain relative movement occurs everywhere on the surface of the bearing rolling elements 37 .

The processed bearing rolling elements 37 and the processing medium 36 are freely placed in the single-silo body 35. As shown in FIG. 8, the centrifugal disc skeleton 10 has six grooves for placing the single-silo along its circumferential direction. It is placed in a groove of the centrifugal disc frame 10 along the axial direction of the centrifugal disc frame 10 until it is full, and the axial compression and radial compression of the single bin are respectively realized through the axial adjustment mechanism and the mounting frame, and then the centrifugal The remaining grooves of the disk frame 10 are filled with a single compartment and the inside single compartment is pressed and fixed, as shown in FIG. 9 .

In this embodiment, the mounting frame includes a lower mounting plate 26 , a compression nut 27 , an upper mounting plate 28 and a fixing nut 29 , as shown in FIGS. 4 , 5 and 7 , the lower mounting plate 26 is pressed flat against the single-silo body. 35, the installation upper plate 28 is installed on the centrifugal disc skeleton 10, and the distance between the installation upper plate 28 and the installation lower plate 26 is adjusted by the compression nut 27 to realize the radial compression of the single warehouse, and the compression nut 27 and the fixed The nut 29 realizes the fastening between the installation upper plate 28 and the installation lower plate 26; as shown in FIG. 6, the axial adjustment mechanism includes a star-shaped handle 30, a set screw 31 and a screw-in disk 32, and the star-shaped handle 30 is tightened. The fixed screw 31 is fixedly connected with the screw-in disk 32, and the screw-in disk 32 is connected with the disk at one end of the centrifugal disk skeleton 10 through threads. It is axially compressed between the disc at the other end of the centrifugal disc frame 10 and the screw-in disc 32 .

As shown in FIGS. 1 and 2 , in this embodiment, there are four centrifugal disc skeletons 10 arranged on the rotary disc 9 , which are arranged at intervals along the circumferential direction of the rotary disc 9 , and are used to realize that the centrifugal disc skeleton 10 revolves as N , and rotates on its own. The processing platform 1 with the planetary motion of n is provided with a bracket 5, a support shaft 12, a rotary disk 9, a first large pulley 7, a second large pulley 19, a first small pulley 3 and a second small pulley 14. , the support shaft 12 is installed on the bracket 5 through the first bearing 6, the first large pulley 7 and the rotary disk 9 are fixedly connected to the support shaft 12, the first large pulley 7 is located on the left side of the rotary disk 9, and the centrifugal disk skeleton 10 is installed between the two rotary discs 9 through the second bearing 8, the first small pulley 3 and the first large pulley 7 are connected by the first belt 4, the first small pulley 3 and the first speed regulating motor 2 is connected, and with the rotation of the first speed regulating motor 2, the centrifugal disc skeleton 10 is driven to perform a movement with a revolution speed of N ;

The right end of the centrifugal disc frame 10 has a connecting shaft for fixing the planetary gear 11. The right end of the connecting shaft extends out of the second bearing 8 and is fixed to the corresponding planetary gear 11. The centrifugal disc frame 10 corresponds to the planetary gear 11 one-to-one and is the same. Shaft linkage, there are four planetary gears 11, the planetary gears 11 are located on the right side of the turntable 9, the second large pulley 19 is mounted on the support shaft 12 through the third bearing 21, and the sun gear 18 is mounted through another third bearing 21 On the support shaft 12, the second large pulley 19 and the central gear 18 are connected through the connecting piece 20, the central gear 18 drives the planetary gear 11 to move through gear transmission, and the second small pulley 14 and the second large pulley 19 pass through the The two belts 13 are connected, the second small pulley 14 is connected with the second speed regulating motor 15, and the centrifugal disc skeleton 10 is driven by the rotation of the second speed regulating motor 15 to move at a rotational speed of n ;

As shown in FIG. 3 , the left end cover 16 is provided at the end of the central gear 18 away from the second large pulley 19 , the right end cover 25 is provided at the end of the second large pulley 19 away from the central gear 18 , and the connecting piece 20 is provided with Between the sun gear 18 and the second large pulley 19, the connecting piece 20 and the left end cover 16 are connected with the thread of the sun gear 18 through the connecting screw 17, and the connecting piece 20 and the right end cover 25 are connected with the third The two large pulleys 19 are threadedly connected, and the two third bearings 21 are limited by the shoulder of the support shaft 12 and the first sleeve 22 and the second sleeve 24 sleeved on the support shaft 12. The second sleeve 24 It is fixed to the support shaft 12 by tightening screws 23 .

In this embodiment, the processing platform 1, the bracket 5, the support shaft 12, the rotary disc 9, the left end cover 16, the centrifugal disc frame 10, the connecting piece 20, the first sleeve 22, the second sleeve 24, the right end The cover 25, the mounting frame, and the axial adjustment mechanism are made of silicon-magnesium alloy, aluminum-magnesium alloy or carbon fiber material, the bearing rolling body 37 is a cylindrical roller, and the rotational speed of the centrifugal disc skeleton 10 is 150-300 r/min; The rotational speed is 150～300r/min.

The number of single positions is q , which is determined by formula (1),

Among them: m ₀ is the mass of the single warehouse, m ₁ is the mass of a single centrifugal disc frame, m ₂ is the mass of a single rotary disc, r is the radius of the centrifugal disc frame; R is the radius of the rotary disc; T ₁ is the first speed regulating motor , i ₁ is the transmission ratio of the first belt, t ₁ is the starting time of the first speed regulating motor, n ₁ is the rotational speed of the first speed regulating motor, r/min; T ₂ is the second speed regulating motor The starting torque of , i ₂ is the transmission ratio of the second belt, t ₂ is the starting time of the second speed regulating motor, n ₂ is the speed of the second speed regulating motor, r/min.

The present invention also provides three embodiments of a multi-silo ultra-precision centrifugal polishing method for the surface of the bearing rolling body. The processed bearing rolling body 37 is a GCr15 cylindrical roller with a size of φ 12×14, as shown in FIG. 16 . As shown in the figure, a is the unprocessed end surface, b is the unprocessed cylindrical surface, c is the processed rear end surface, and d is the processed cylindrical surface.

Example 1:

A multi-silo ultra-precision centrifugal polishing method for the surface of a bearing rolling body, the method comprises the following steps:

S1, add 60% (about 108g) of 14 ^# walnut shells and 5.4g DS-100 roll varnish to the single warehouse body 35;

S2, place the processed bearing rolling body 37 on the single-silo body 35, and embed it into the processing medium 36, cover the single-silo end cover 34, and close the single-silo;

S3, placing the above-mentioned single warehouse with the processing medium 36 and the bearing rolling body 37 on one of the centrifugal disc skeletons 10;

S4, repeating the steps S1-S3 until 18 separate bins are placed in a groove of the centrifugal disc frame 10 along the axis of the centrifugal disc frame 10, and are pressed and fixed on the centrifugal disc frame 10 by the mounting frame and the star handle 30 ;

S5, repeat steps S1-S4 until the 6 grooves on the centrifugal disc skeleton 10 are filled with single bins and press and fix; S6, repeat steps S1-S5 until 432 single bins are fixed on 4 centrifugal discs on the skeleton 10;

S7, adjust the rotational speed of the first speed regulating motor 2 so that the rotational speed of the rotary disk 9 is 150 r/min;

S8, adjust the rotational speed of the second speed regulating motor 15, so that the rotational speed of the centrifugal disc skeleton 10 is 150 r/min;

S9, start the first speed regulating motor 2 and the second speed regulating motor 15, the centrifugal disc frame 10 follows the first speed regulating motor 2, the first small pulley 3, the first large pulley 7, the rotary disk 9, the second The speed regulating motor 15, the second small pulley 14, the second large pulley 19, the central gear 18, and the planetary gear 11 do planetary motion with the revolution of N and the rotation of n . 10 Move together to complete the finishing of the surface of the bearing rolling element 37;

S10, after processing for 220 minutes, stop the first speed regulating motor 2 and the second speed regulating motor 15;

S11, disassemble the installation frame, loosen the star handle 30, and remove the single compartment from the centrifugal disc frame 10;

S12, remove the end cover 34 of the single chamber, and take out the bearing rolling body 37.

Processing effect:

The Ra value of the cylindrical surface roughness of the surface of the bearing rolling element 37 is reduced from 0.094μm to 0.042μm, the scratch part is removed to achieve a mirror effect, the Ra value of the end surface roughness is reduced from 0.117μm to 0.064μm, the scratch part is removed to achieve ultra-precision polishing Grinding target.

Example 2:

A multi-silo ultra-precision centrifugal polishing method for the surface of a bearing rolling body, the method comprises the following steps:

S1, add 60% (about 108g) of 14 ^# walnut shells and 5.4g DS-100 roll varnish to the single warehouse body 35;

S2, place the processed bearing rolling body 37 on the single-silo body 35, and embed it into the processing medium 36, cover the single-silo end cover 34, and close the single-silo;

S3, placing the above-mentioned single warehouse with the processing medium 36 and the bearing rolling body 37 on one of the centrifugal disc skeletons 10;

S4, repeating the steps S1-S3 until 18 separate bins are placed in a groove of the centrifugal disc frame 10 along the axis of the centrifugal disc frame 10, and are pressed and fixed on the centrifugal disc frame 10 by the mounting frame and the star handle 30 ;

S5, repeat steps S1-S4 until the 6 grooves on the centrifugal disc skeleton 10 are filled with single bins and press and fix; S6, repeat steps S1-S5 until 432 single bins are fixed on 4 centrifugal discs on the skeleton 10;

S7, adjust the rotational speed of the first speed regulating motor 2 so that the rotational speed of the rotary disk 9 is 225 r/min;

S8, adjust the rotational speed of the second speed regulating motor 15, so that the rotational speed of the centrifugal disc skeleton 10 is 225 r/min;

S9, start the first speed regulating motor 2 and the second speed regulating motor 15, the centrifugal disc frame 10 follows the first speed regulating motor 2, the first small pulley 3, the first large pulley 7, the rotary disk 9, the second The speed regulating motor 15, the second small pulley 14, the second large pulley 19, the central gear 18, and the planetary gear 11 do planetary motion with the revolution of N and the rotation of n . 10 Move together to complete the finishing of the surface of the bearing rolling element 37;

S10, after processing for 220 minutes, stop the first speed regulating motor 2 and the second speed regulating motor 15;

S11, disassemble the installation frame, loosen the star handle 30, and remove the single compartment from the centrifugal disc frame 10;

S12, remove the end cover 34 of the single chamber, and take out the bearing rolling body 37.

Processing effect:

The Ra value of the cylindrical surface roughness of the bearing rolling element 37 is reduced from 0.088μm to 0.025μm, the scratches are removed to achieve a mirror effect, the Ra value of the end surface roughness is reduced from 0.102μm to 0.042μm, the scratches are removed to achieve ultra-precision polishing Grinding target.

Example 3:

A multi-silo ultra-precision centrifugal polishing method for the surface of a bearing rolling body, the method comprises the following steps:

S1, add 60% (about 108g) of 14 ^# walnut shells and 5.4g DS-100 roll varnish to the single warehouse body 35;

S2, place the processed bearing rolling body 37 on the single-silo body 35, and embed it into the processing medium 36, cover the single-silo end cover 34, and close the single-silo;

S3, placing the above-mentioned single warehouse with the processing medium 36 and the bearing rolling body 37 on one of the centrifugal disc skeletons 10;

S4, repeating the steps S1-S3 until 18 separate bins are placed in a groove of the centrifugal disc frame 10 along the axis of the centrifugal disc frame 10, and are pressed and fixed on the centrifugal disc frame 10 by the mounting frame and the star handle 30 ;

S5, repeat steps S1-S4 until the 6 grooves on the centrifugal disc skeleton 10 are filled with single bins and press and fix; S6, repeat steps S1-S5 until 432 single bins are fixed on 4 centrifugal discs on the skeleton 10;

S7, adjust the rotational speed of the first speed regulating motor 2, so that the rotational speed of the rotary disk 9 is 300 r/min;

S8, adjust the rotational speed of the second speed regulating motor 15, so that the rotational speed of the centrifugal disc skeleton 10 is 300 r/min;

S9, start the first speed regulating motor 2 and the second speed regulating motor 15, the centrifugal disc frame 10 follows the first speed regulating motor 2, the first small pulley 3, the first large pulley 7, the rotary disk 9, the second The speed regulating motor 15, the second small pulley 14, the second large pulley 19, the central gear 18, and the planetary gear 11 do planetary motion with the revolution of N and the rotation of n . 10 Move together to complete the finishing of the surface of the bearing rolling body 37;

S10, after processing for 220 minutes, stop the first speed regulating motor 2 and the second speed regulating motor 15;

S11, disassemble the installation frame, loosen the star handle 30, and remove the single compartment from the centrifugal disc frame 10;

S12, remove the end cover 34 of the single chamber, and take out the bearing rolling body 37.

Processing effect:

The Ra value of the cylindrical surface roughness of the surface of the bearing rolling element 37 is reduced from 0.097μm to 0.012μm, the scratches are basically removed, and the mirror effect is achieved. Achieving the goal of ultra-fine polishing.

The above description is only a preferred embodiment of the present invention, but the protection scope of the present invention is not limited to this. Substitutions should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (10)

1. A multi-silo ultra-precise centrifugal polishing device for the surface of the bearing rolling body, characterized in that: it comprises several separate bins, and the processing medium (36) is preloaded in the separate bin, and the separate bin is fixed on the centrifugal disc skeleton (10). ), the centrifugal disc skeleton (10) along with the rotary disc (9) around the axis of the support shaft (12) to make a planetary motion with a revolution speed of N and a rotation speed of n . 2. A multi-silo ultra-precise centrifugal polishing device for bearing rolling body surfaces according to claim 1, characterized in that: the single-silo is a split structure, including a single-silo body (35) , end cap screws (33) and single compartment end cap (34). 3. A multi-silo ultra-precision centrifugal polishing device for the surface of bearing rolling elements according to claim 2, characterized in that: the centrifugal disc skeleton (10) is distributed along its circumferential direction with multiple channels for The trough body for placing the single bins, each trough body is arranged along the axial direction of the centrifugal disc skeleton (10), the single bin is placed in the trough body of the centrifugal disc skeleton (10), the radial compression is realized by the mounting frame, and the shaft To achieve axial compression to the adjustment mechanism. 4. A multi-silo ultra-precision centrifugal polishing device for bearing rolling element surfaces according to claim 3, characterized in that: the mounting frame comprises a mounting lower plate (26), a compression nut (27) , Install the upper plate (28) and the fixing nut (29), the lower installation plate (26) is flatly pressed on the single-silo body (35), and the upper installation plate (28) is installed on the centrifugal disc frame (10), The distance between the upper mounting plate (28) and the lower mounting plate (26) is adjusted by the compression nut (27) to realize radial compression of the single compartment, and the upper mounting plate (29) is installed through the compression nut (27) and the fixing nut (29). Fastening between plate (28) and mounting lower plate (26). 5. A multi-silo ultra-precision centrifugal polishing device for bearing rolling element surfaces according to claim 3, characterized in that: the axial adjustment mechanism comprises a star-shaped handle (30), a set screw ( 31) and the screw-in disk (32), the star-shaped handle (30) is fixedly connected with the screw-in disk (32) through the set screw (31), and the screw-in disk (32) and the centrifugal disk frame (10) are screwed The axial movement of the screw-in disc (32) can be adjusted by twisting the star-shaped handle (30), so as to realize the axial compression of the single chamber. 6. A multi-silo ultra-precision centrifugal polishing device for bearing rolling element surfaces according to any one of claims 1-5, characterized in that it further comprises a processing platform (1), the processing platform (1). ) is provided with a bracket (5), a support shaft (12), a rotary disc (9), a first large pulley (7), a second large pulley (19), a first small pulley (3) and a second pulley The small pulley (14), the support shaft (12) is fixedly connected to the first large pulley (7) and the rotary disc (9), and the centrifugal disc frame (10) is installed on the rotary disc (9) through the second bearing (8). A planetary gear (11) is fixedly connected to the top, the first small pulley (3) and the first large pulley (7) are connected by a first belt (4), and the first small pulley (3) is connected to the first The speed regulating motor (2) is connected and rotates with the first speed regulating motor (2); the second large pulley (19) is mounted on the support shaft (12) through a third bearing (21), the second largest pulley (19) is The pulley (19) is connected to the central gear (18) through the connecting piece (20), the central gear (18) is mounted on the support shaft (12) through another third bearing (21), and the central gear (18) is driven by gear transmission The planetary gear (11) moves, the second small pulley (14) is connected with the second large pulley (19) through the second belt (13), and the second small pulley (14) is connected to the second speed regulating motor ( 15) Connection, with the rotation of the second speed regulating motor (15); the connecting piece (20) is connected with the central gear (18) and the second large pulley (19) through connecting screws (17). 7. A multi-silo ultra-precision centrifugal polishing device for bearing rolling element surfaces according to claim 6, characterized in that: the number of the single-silo is q , which is determined by formula (1),

Among them: m ₀ is the mass of the single warehouse, m ₁ is the mass of a single centrifugal disc frame, m ₂ is the mass of a single rotary disc, r is the radius of the centrifugal disc frame; R is the radius of the rotary disc; T ₁ is the first speed regulating motor , i ₁ is the transmission ratio of the first belt, t ₁ is the starting time of the first speed regulating motor, n ₁ is the rotational speed of the first speed regulating motor, r/min; T ₂ is the second speed regulating motor The starting torque of , i ₂ is the transmission ratio of the second belt, t ₂ is the starting time of the second speed regulating motor, n ₂ is the speed of the second speed regulating motor, r/min. 8 . The multi-silo ultra-precision centrifugal polishing device for bearing rolling element surfaces according to claim 7 , characterized in that: the rotational speed n of the centrifugal disc skeleton ( 10 ) is 150-300 r/min; 9 . The rotational speed of the rotary disc (9), that is, the revolution speed N of the centrifugal disc frame (10) around the axis of the support shaft (12) is 150-300 r/min. 9. A multi-silo ultra-precision centrifugal polishing device for bearing rolling element surface according to claim 1, characterized in that: the processing medium (36) is composed of dry light particles and oily medium The mixture, the dry light particles are walnut shells, corn cob or olive husks, the oily medium is roll varnish, the loading amount of the dry light particles is 60% of the volume of the single warehouse, and the oily medium loading amount It is 5% of the mass of dry lightweight pellets. 10. A method of utilizing the multi-silo ultra-precise centrifugal polishing device for the surface of the bearing rolling body according to claim 7, characterized in that: comprising the steps of: S1, adding a processing medium (36) into the single-silo body (35); S2, freely place the processed bearing rolling body (37) on the single-silo body (35), and embed it into the processing medium (36), cover the single-silo end cover (34), and close the single-silo; S3, placing the above-mentioned separate bin already equipped with the processing medium (36) and the bearing rolling body (37) on one of the centrifugal disc skeletons (10); S4, repeat steps S1-S3, place the single bin in a groove of the centrifugal disc frame (10) along the axial direction of the centrifugal disc frame (10) until it is full, and press it through the mounting frame and the star handle (30). be tightly fixed on the centrifugal disc frame (10); S5, repeat the steps S1-S4 until the 6 grooves on the centrifugal disc skeleton (10) are filled with the single bins and pressed and fixed; S6, repeating the steps S1-S5 until the q single compartments are fixed on all the centrifugal disc skeletons (10); S7, adjust the rotational speed of the first speed regulating motor (2) so that the rotational speed of the turntable (9) is 150-300 r/min; S8, adjust the rotational speed of the second speed regulating motor (15), so that the rotational speed of the centrifugal disc skeleton (10) is 150-300 r/min; S9, start the first speed regulating motor (2) and the second speed regulating motor (15), the centrifugal disc frame (10) follows the first speed regulating motor (2), the first small pulley (3), the first large Pulley (7), rotary disc (9), second speed regulating motor (15), second small pulley (14), second large pulley (19), central gear (18), planetary gear (11) Make planetary motion with revolution of N and rotation of n , and the single warehouse fixed on it moves together with the centrifugal disc skeleton (10) to complete the finishing of the surface of the bearing rolling body (37); S10, after processing the preset time, stop the first speed regulating motor (2) and the second speed regulating motor (15); S11, disassemble the installation frame, loosen the star handle (30), and remove the single compartment from the centrifugal disc frame (10); S12, remove the end cover (34) of the single chamber, and take out the bearing rolling element (37).

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