A surface grinding device for machining bearing steel balls

Abstract

The invention relates to a surface grinding device for processing bearing steel balls applied in the field of grinding technology. The device comprises double grinding discs symmetrically arranged in an upper and lower direction, a vortex-shaped grinding groove is provided on the grinding disc surface, and a driving disc for clamping the bearing steel balls in the middle is driven by an external gear-toothed ring to realize spiral advancement and continuous grinding of the bearing steel balls between the grinding discs. The driving disc adopts a dovetail tenon-mortise structure distributed in an annular array, and has high assembly precision and reliable transmission. A piezoelectric material vibration block is arranged at the outer edge of the lower grinding disc, which can drive the lower grinding disc to vibrate at a high frequency and a micro-amplitude under the action of voltage, and cooperate with the composite grinding liquid flowing between the grinding discs to improve the grinding efficiency and surface quality. Piezoelectric material adjustment rings are arranged at the outer ends of the upper and lower grinding discs, which can monitor the force changes in the grinding process in real time, and the grinding disc gap is compensated and adjusted by a controller to realize adaptive control. During the grinding process, a pulse voltage is passed between the grinding disc and the bearing steel ball to generate electric spark discharge, and the surface finish can be improved.

Description

Technical Field

[0001] The invention relates to a surface grinding device for machining a bearing steel ball, and in particular to a surface grinding device for machining a bearing steel ball applied in the field of grinding technology. Background Art

[0002] As a key component of bearings, the surface quality of bearing steel balls directly affects the running accuracy, noise and service life of bearings. At present, the processing of bearing steel balls mainly adopts grinding wheel grinding, polishing and other processes, which have problems such as low processing efficiency and unstable surface quality.

[0003] Chinese invention patent CN109648427B discloses a variable ball diameter automatic screening grinding machine, which sets multiple concentric raceways and valve ports on the surface of the lower grinding disc, utilizes the linear velocity difference of the raceways at different radii, first removes the ring band on the surface of the steel ball, and then performs precise grinding, and simultaneously utilizes centrifugal force to automatically sort the ball size, thereby improving production efficiency and product quality. However, this device is mainly aimed at the situation where the ball diameter difference is large, and the sorting effect is limited for the processing of bearing steel balls with high requirements for size consistency. Moreover, the grinding force mainly comes from the dead weight of the steel ball, which is difficult to control and adjust, affecting the stability of the processing accuracy.

[0004] Chinese invention patent CN110238759B discloses a rolling bearing steel ball mill, which is equipped with a powder removal and self-feeding device. It removes dust generated during the grinding process through filter plates and electrostatic adsorption, and automatically replenishes abrasives through gravity sensing, thereby improving the cleanliness of the processing environment and the utilization rate of abrasives. However, its driving mode is still a conventional eccentric drive, and the grinding efficiency is not high. In addition, it lacks effective online monitoring means, making it difficult to control the grinding state in real time, and the overall intelligence level is insufficient.

[0005] In summary, the existing bearing steel ball grinding devices need to be further improved in terms of precision control, processing efficiency, and intelligent regulation. Summary of the invention

[0006] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is the deficiencies of the existing bearing steel ball grinding device in terms of precision control, processing efficiency, intelligent regulation and control, etc.

[0007] In order to solve the above problems, the present invention provides a surface grinding device for processing bearing steel balls, comprising an upper grinding disc and a lower grinding disc symmetrically arranged up and down, a driving disc rotatably connected between the upper grinding disc and the lower grinding disc, an upper adjusting ring and a lower adjusting ring are respectively fixedly connected to the ends of the upper grinding disc and the lower grinding disc away from each other, a reciprocating rotating shaft is fixedly connected to the bottom end of the lower grinding disc, a plurality of vibration rods are fixedly connected to the position where the outer end of the reciprocating rotating shaft is located at the lower side of the lower adjusting ring, a vibration block is fixedly connected between two adjacent vibration rods, a gear ring is fixedly connected to the outer end of the driving disc, a gear is meshedly connected to the outer end of the gear ring, and the top of the upper adjusting ring is fixedly connected to the gear ring. The end is fixedly connected with a bracket, the reciprocating rotating shaft is rotatably connected to the bracket, the gear power shaft passes through the bracket, and the penetrating part is fixedly connected with a motor, the motor is electrically connected to a controller, the upper grinding disc, the lower grinding disc, the upper adjusting ring, the lower adjusting ring and multiple vibration blocks are all electrically connected to the controller, a grinding groove is provided at one end of the upper grinding disc and the lower grinding disc close to each other, and the grinding groove is a vortex structure, the center point of the vortex structure coincides with the axis of the upper grinding disc, the upper grinding disc and the lower grinding disc are both made of wear-resistant conductive material, the lower grinding disc can reciprocate at high frequency under the action of the vibration block, and the rotation angle is between 0.01°-0.05°.

[0008] In the above-mentioned surface grinding device for processing bearing steel balls, the processing quality and production efficiency of bearing steel balls are improved, and energy consumption and costs are reduced through the integrated application of innovative structures and processes such as double-disc vortex propulsion, high-frequency vibration grinding, electric spark-assisted etching, and piezoelectric adaptive adjustment.

[0009] As a further improvement of the present application, a feed hole is opened in the center of the upper grinding disc along its axial direction, and a feed pipe is fixedly connected to the top of the upper grinding disc relative to the feed hole. The feed pipe is a conical structure, and the end with a larger diameter of the conical structure is arranged away from the upper grinding disc.

[0010] As a further improvement of the present application, the driving disc includes a plurality of driving plates distributed in a circular array around the axis of the upper grinding disc, and the diameter of the circle formed by one end of the plurality of driving plates close to each other is larger than the diameter of the feed hole on the upper grinding disc.

[0011] As a further improvement of the present application, one end of the plurality of drive plates that are away from each other is clamped with the same drive ring via a dovetail tenon, and the thickness of the drive ring is equal to the thickness of the drive plate.

[0012] As another improvement of the present application, the top and bottom ends of the driving ring are fixedly connected to driving fixing rings, and the driving ring and the outer ends of the two driving fixing rings are fixedly connected to the same gear ring.

[0013] As another improvement supplement of the present application, the upper adjustment ring and the lower adjustment ring are both composed of multiple adjustment blocks, the multiple adjustment blocks are all made of piezoelectric material, and the direction of volume change of the piezoelectric material is parallel to the axial direction of the upper adjustment ring and the lower adjustment ring.

[0014] As another improvement supplement of the present application, an adjustment ring fixing plate is fixedly connected between the ends of the upper adjustment ring and the lower adjustment ring away from the driving disk and the bracket, and a plurality of adjustment blocks are evenly distributed around the axis of the adjustment ring fixing plate.

[0015] As another improvement of the present application, the upper grinding disc and the lower grinding disc are both cylindrical structures, the multiple vibration blocks are all made of piezoelectric materials, and the direction of volume change of the piezoelectric material is parallel to the direction of the circumference of the outer end of the lower grinding disc. The upper grinding disc and the lower grinding disc are filled with grinding liquid, which is a water-based or oil-based insulating liquid, and abrasive is added to the grinding liquid.

[0016] A method for grinding a bearing steel ball using a surface grinding device for machining a bearing steel ball comprises the following steps:

[0017] S1. The bearing steel ball to be ground is put into the feeding pipe at the top of the upper grinding disc. The bearing steel ball is pushed by multiple driving plates and moves from the axis to the outer edge through the grinding groove between the upper grinding disc and the lower grinding disc;

[0018] S2, the controller controls the vibration block to drive the lower grinding disc to perform high-frequency reciprocating rotation, and the upper and lower grinding discs cooperate with the grinding fluid to grind the surface of the bearing steel ball;

[0019] S3, the controller monitors the voltage changes of the upper and lower adjustment rings in real time, calculates the force of the adjustment block, and when the force deviation of the upper and lower grinding discs is detected, the corresponding adjustment block is energized to make it deform to compensate for the deviation of the grinding disc;

[0020] S4. The controller energizes the upper grinding disc and the lower grinding disc at the same time, so that electric spark discharge is formed between them and the bearing steel balls, and the bearing steel balls are quickly ground with the abrasive and high-frequency rotation until the bearing steel balls are discharged from the outer edges of the upper and lower grinding discs after grinding.

[0021] In summary, this application has the following beneficial effects:

[0022] 1. The double grinding disc structure is symmetrically arranged up and down. The grinding disc surface is provided with a spiral grinding groove. Through the external gear-gear ring transmission, the driving disc holding the bearing steel ball in the middle is driven to rotate, which can realize the spiral advancement and continuous grinding of the bearing steel ball between the grinding discs. The processing efficiency is high, and the grinding disc area can be fully utilized to increase the processing volume per unit time. The grinding groove is in a spiral shape, with a large contact area with the bearing steel ball. From the center to the edge of the grinding disc, the grinding force gradually increases, realizing the process from coarse to fine, and can improve the surface quality and sphericity of the bearing steel ball.

[0023] 2. The drive disc adopts a dovetail tenon-mortise structure with an annular array distribution, which has high assembly precision, reliable transmission, and can withstand large grinding torque. The gap between two adjacent pieces matches the size of the bearing steel ball, which can play a role in limiting and protecting the bearing steel ball during the feeding process, effectively reducing the cracking and surface damage of the bearing steel ball caused by extrusion and collision during the grinding process, and improving the yield rate.

[0024] 3. A high-frequency vibration device is set on the outer edge of the lower grinding disc. The vibration block made of piezoelectric material can generate high-frequency micro-expansion and contraction along the circumferential direction of the grinding disc under the action of voltage, thereby driving the lower grinding disc to vibrate at high frequency and low amplitude. In combination with the flowing grinding fluid, the relative movement speed between the grinding fluid and the grinding surface can be increased, the renewal of the abrasive particles can be accelerated, and the grinding particles can be continuously flushed to remove the grinding chips, so that the grinding surface always maintains a clean and sharp abrasive effect, thereby improving the grinding efficiency and surface finish.

[0025] 4. A piezoelectric material adjustment ring is set at the outer end of the upper and lower grinding discs and connected to the control system. According to the changes in the bearing steel ball size and process parameters during the grinding process, the feedback voltage generated by the pressure on the adjustment ring can be monitored in real time, the change in the grinding disc gap can be calculated, and voltage can be applied to the adjustment ring through the controller to cause axial deformation to compensate for the grinding disc gap, thereby realizing adaptive control of the grinding disc gap and ensuring that the bearing steel ball is always in the best grinding state, which not only improves the grinding accuracy but also extends the service life of the grinding disc.

[0026] 5. During the grinding process, a pulse voltage is applied between the grinding disc and the bearing steel ball, and the insulating grinding fluid flowing between the grinding disc and the bearing steel ball is used to generate an electric spark discharge effect. While grinding, the surface of the bearing steel ball is micro-etched by electric sparks to remove tiny protrusions and oxide layers on the surface, making the surface smoother, further improving the processing accuracy and surface quality of the bearing steel ball and extending the service life of the bearing.

[0027] 6. The present invention specifically designs a composite water-based / oil-based grinding liquid for grinding bearing steel balls. By adding high-hardness abrasives such as diamond and silicon carbide of different particle sizes, utilizing the cooling and lubricating effect of the liquid and the grinding effect of solid particles, under the action of high-frequency vibration and electric field, the synergistic effect of mechanical grinding and chemical etching can be fully exerted, so that the grinding quality and efficiency of the bearing steel balls of the present invention far exceed the traditional method. At the same time, the grinding liquid used can be reused and can be recycled for many times after purification, which reduces waste liquid discharge, reduces production costs, and has good economic and environmental benefits.

[0028] 7. The bearing steel ball grinding device of the present invention has a modular and parameterized design, and the rotation speed, vibration frequency, processing gap, grinding liquid composition and electrical parameters can be flexibly set according to the material, size and precision requirements of the bearing steel ball. It can meet the processing requirements of bearing steel balls of different models and different precision grades. It has a wide range of applications and high processing flexibility. It is of great significance to improve the quality and reduce the cost of bearing steel balls, and plays a positive role in promoting the development of my country's bearing industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is the overall structure diagram of this application;

[0030] Figure 2 This is the front view of the application;

[0031] Figure 3 For this application Figure 2 Middle AA section view;

[0032] Figure 4 For this application Figure 3 Middle BB section view;

[0033] Figure 5 For this application Figure 3 Middle CC section view;

[0034] Figure 6 For this application Figure 3 Middle DD section view;

[0035] Figure 7 This is an overall exploded view of this application;

[0036] Figure 8 Partial explosion for this application Figure 1 ;

[0037] Fig. 9 Partial explosion for this application Figure 2 ;

[0038] Fig.10 Partial explosion for this application Figure 3 ;

[0039] Fig.11 This is the appearance structure diagram of this application.

[0040] Description of the numbers in the figure:

[0041] 1. Upper grinding disc; 2. Lower grinding disc; 3. Driving disc; 4. Upper adjusting ring; 5. Lower adjusting ring; 6. Reciprocating shaft; 7. Vibrating rod; 8. Vibrating block; 9. Gear ring; 10. Gear; 11. Bracket; 12. Feed pipe; 13. Driving plate; 14. Driving ring; 15. Driving fixed ring; 16. Adjusting block; 17. Adjusting ring fixing plate. DETAILED DESCRIPTION

[0042] Three implementation modes of the present application are described in detail below with reference to the accompanying drawings.

[0043] Example 1

[0044] Figures 1 to 11 It is shown that the present embodiment provides a surface grinding device for processing bearing steel balls, including an upper grinding disc 1 and a lower grinding disc 2 symmetrically arranged above and below, a driving disc 3 is rotatably connected between the upper grinding disc 1 and the lower grinding disc 2, and an upper adjustment ring 4 and a lower adjustment ring 5 are respectively fixedly connected at one end of the upper grinding disc 1 and the lower grinding disc 2 away from each other. A reciprocating shaft 6 is fixedly connected to the bottom end of the lower grinding disc 2, and a plurality of vibration rods 7 are fixedly connected to the position of the outer end of the reciprocating shaft 6 located at the lower side of the lower adjustment ring 5, and a vibration block 8 is fixedly connected between two adjacent vibration rods 7. A gear ring 9 is fixedly connected to the outer end of the driving disc 3, and a gear 10 is meshedly connected to the outer end of the gear ring 9. A bracket 11 is fixedly connected to the top of the upper adjustment ring 4, and the reciprocating shaft 6 is rotatably connected to the bracket 11. The power shaft of the gear 10 passes through the bracket 11, and a motor is fixedly connected to the penetration part, and the motor is electrically connected to a controller. The upper grinding disc 1, the lower grinding disc 2, the upper adjustment ring 4, the lower adjustment ring 5 and the plurality of vibration blocks 8 are all electrically connected to the controller.

[0045] See also Figure 4 The upper grinding disc 1 and the lower grinding disc 2 are provided with a grinding groove at one end close to each other, and the grinding groove is a vortex structure, and the center point of the vortex structure coincides with the axis of the upper grinding disc 1. The upper grinding disc 1 and the lower grinding disc 2 are both made of wear-resistant conductive materials, preferably cemented carbide materials or diamond coating materials. The lower grinding disc 2 can reciprocate at high frequency under the action of the vibration block 8, and the rotation angle is controlled between 0.01°-0.05°. The grinding efficiency and accuracy can be improved by high-frequency reciprocating rotation at a small angle.

[0046] Furthermore, a feed hole is provided at the center of the upper grinding disc 1 along its axial direction, and a feed pipe 12 is fixedly connected to the top of the upper grinding disc 1 relative to the feed hole, and the feed pipe 12 is a conical structure, and the end with a larger diameter of the conical structure is arranged away from the upper grinding disc 1. The conical feed pipe 12 can realize the rapid and uniform feeding of the bearing steel balls.

[0047] Specifically, the drive disc 3 includes a plurality of drive plates 13 distributed in a circular array around the axis of the upper grinding disc 1, and the diameter of the circle formed by the ends of the plurality of drive plates 13 close to each other is larger than the diameter of the feed hole on the upper grinding disc 1. The ends of the plurality of drive plates 13 far from each other are clamped with the same drive ring 14 through a dovetail tenon, and the thickness of the drive ring 14 is equal to the thickness of the drive plate 13. The top and bottom ends of the drive ring 14 are fixedly connected to a drive fixing ring 15, and the outer ends of the drive ring 14 and the two drive fixing rings 15 are fixedly connected to the same gear ring 9. The above-mentioned drive disc 3 structure can realize the precise positioning and rapid transmission of the bearing steel balls.

[0048] During operation, the bearing steel balls to be ground are put in from the feed pipe 12. Under the action of gravity, the bearing steel balls fall into the driving plates 13 of the driving plate 3 through the feed holes on the upper grinding disc 1 in turn. After the bearing steel balls are clamped by the driving plates 13, as the driving disc 3 rotates, the driving plates 13 push the bearing steel balls from the axis to the outer edge along the vortex curve of the grinding groove. At the same time, the vibration block 8 drives the lower grinding disc 2 to reciprocate at high frequency, and cooperates with the upper grinding disc 1 to grind the surface of the bearing steel balls. The gear ring 9 rotates synchronously with the driving disc 3, drives the gear 10 to rotate through the meshing connection, and the gear 10 drives the driving disc 3 to rotate through the shaft transmission, so as to realize the continuous grinding of the bearing steel balls.

[0049] The surface grinding device for processing bearing steel balls provided in this embodiment can realize continuous precision grinding of bearing steel balls from the inside to the outside through the cooperation of the drive disc 3 and the vortex grinding grooves of the upper grinding disc 1 and the lower grinding disc 2. The device has high integration and high processing efficiency. The high-frequency reciprocating rotation of the lower grinding disc 2 under the action of the vibration block 8 improves the grinding effect. The upper and lower grinding discs are made of wear-resistant conductive materials with high hardness and good wear resistance. At the same time, it is easy to realize electric spark assisted grinding and improve grinding accuracy. The drive disc 3 adopts a dovetail tenon structure to connect the annular array drive plate 13, which has reliable transmission and easy assembly. The conical structure of the feed pipe 12 is conducive to the rapid and uniform feeding of bearing steel balls. The whole machine has a compact structure and reliable operation, which is suitable for mass production of precision bearing steel balls.

[0050] Example 2

[0051] Figures 1 to 11 It is shown that, based on Example 1, this embodiment provides a surface grinding device for machining bearing steel balls with intelligent adjustment and compensation functions.

[0052] See also Figure 5 , the upper adjustment ring 4 and the lower adjustment ring 5 are composed of a plurality of adjustment blocks 16, and the plurality of adjustment blocks 16 are all made of piezoelectric materials. The characteristic of piezoelectric materials is that they will produce mechanical deformation under the action of an electric field, and will generate electric charge when subjected to mechanical pressure, thereby realizing the mutual conversion of mechanical energy and electrical energy. The volume change direction of the piezoelectric material of the adjustment block 16 is parallel to the axial direction of the upper adjustment ring 4 and the lower adjustment ring 5. When the upper adjustment ring 4 and the lower adjustment ring 5 are subjected to axial pressure, the adjustment block 16 will produce axial deformation, thereby realizing the automatic adjustment of the gap between the upper grinding disc 1 and the lower grinding disc 2.

[0053] Furthermore, an adjustment ring fixing plate 17 is fixedly connected between the ends of the upper adjustment ring 4 and the lower adjustment ring 5 away from the driving disk 3 and the bracket 11, and a plurality of adjustment blocks 16 are evenly distributed around the axis of the adjustment ring fixing plate 17. The adjustment ring fixing plate 17 plays a role in supporting and positioning the adjustment blocks 16, ensuring the consistency of the deformation direction of the adjustment blocks 16.

[0054] The upper grinding disc 1 and the lower grinding disc 2 are both cylindrical structures, and a plurality of vibration blocks 8 are evenly distributed on the outer circumference of the lower grinding disc 2. The vibration blocks 8 are also made of piezoelectric material, and the direction of their volume change is parallel to the direction of the outer circumference of the lower grinding disc 2. When the vibration blocks 8 are stretched and deformed under the voltage of the controller, the lower grinding disc 2 can be driven to perform high-frequency rotational vibration at a small angle to improve the grinding efficiency.

[0055] During specific operation, the controller monitors the voltage signal of the adjustment block 16 in real time. When the bearing steel ball enters between the upper grinding disc 1 and the lower grinding disc 2, an outward thrust is generated on the upper grinding disc 1 and the lower grinding disc 2, causing the adjustment block 16 to be axially compressed. The adjustment block 16 converts the pressure into a voltage signal and transmits it to the controller. The controller calculates the pressure exerted on the adjustment block 16 in real time according to the change of the voltage signal, and then obtains the change of the gap size between the upper grinding disc 1 and the lower grinding disc 2. When the deviation of the grinding disc gap is detected, the controller will output voltage to the corresponding adjustment block 16 in time, so that the adjustment block 16 will produce axial elongation, compensate for the deviation of the grinding disc gap, and keep the gap size within the optimal grinding range. At the same time, the controller also outputs an alternating voltage to the vibration block 8 according to the processing needs, driving the lower grinding disc 2 to perform high-frequency rotational vibration grinding motion.

[0056] Compared with Example 1, this embodiment uses piezoelectric materials to make the adjustment block 16 and the vibration block 8, and is electrically connected to the controller to form a set of intelligent adjustment compensation mechanism and vibration grinding mechanism, which can realize real-time online monitoring and automatic compensation control of the grinding process, and further improve the processing accuracy and stability of the bearing steel ball. Piezoelectric materials have high response frequency, small size, and are easy to integrate. They are particularly suitable for making the actuator components of high-precision grinding devices. The cooperation between the adjustment ring and the adjustment ring fixing plate can effectively limit the deformation direction of the adjustment block and improve the reliability of the adjustment compensation. The use of high-frequency vibration blocks to drive the lower grinding disc to vibrate and grind can enhance the flow and renewal of the grinding liquid and abrasive particles, and improve the grinding efficiency.

[0057] Example 3

[0058] Figures 1 to 11 It is shown that, based on Examples 1 and 2, this embodiment provides a bearing steel ball processing method using electric spark-assisted composite grinding and a special grinding fluid thereof.

[0059] The upper grinding disc 1 and the lower grinding disc 2 are filled with a grinding liquid, which is a water-based or oil-based insulating liquid. High-hardness abrasive particles such as diamond, silicon carbide, and corundum are added to the grinding liquid, and the abrasive particle size is 1-50 μm, preferably 5-20 μm, and the abrasive volume concentration is 5%-25%, preferably 8%-12%. The grinding liquid used in this embodiment integrates liquid lubrication, insulation, and solid grinding, which can improve grinding efficiency and surface quality.

[0060] The process steps of grinding bearing steel balls using the device of the present invention are as follows:

[0061] Step S1, the bearing steel balls to be ground are put into the feed pipe 12 at the top of the upper grinding disc 1, and the bearing steel balls are pushed by multiple driving plates 13 to move from the axis to the outer edge through the grinding groove between the upper grinding disc 1 and the lower grinding disc 2.

[0062] Step S2, the controller controls the vibration block 8 to drive the lower grinding disc 2 to perform high-frequency reciprocating rotation, the frequency is 50-500Hz, the rotation angle is 0.01°-0.05°, and the upper and lower grinding discs cooperate with the flowing grinding liquid to grind the surface of the bearing steel ball. The grinding liquid can be quickly updated under the action of high-frequency vibration, taking away the grinding chips, and continuously bringing in fresh abrasives to maintain a stable grinding capacity.

[0063] Step S3, the controller monitors the voltage changes of the upper adjustment ring 4 and the lower adjustment ring 5 in real time, and calculates the force conditions of each adjustment block 16 by consulting the preset pressure-voltage comparison table. When it is detected that the force of a certain adjustment block 16 is too low, it means that the gap between the upper and lower grinding discs at that location is too large, and the controller applies voltage to the adjustment block to extend it axially and reduce the gap; on the contrary, if the force of the adjustment block is too high, a reverse voltage is applied to shorten it axially and expand the gap. In this way, the gaps of various grinding discs are dynamically adjusted to compensate for the gap deviation caused by the uneven size of the bearing steel balls, ensuring that the grinding process is carried out under the optimal gap conditions.

[0064] Step S4, the controller simultaneously passes a pulse voltage to the upper grinding disc 1 and the lower grinding disc 2, the voltage amplitude is 50-200V, and the pulse frequency is 1-10kHz. Under the insulating effect of the grinding fluid, when the gap between the upper and lower grinding discs and the bearing steel ball is reduced to a certain extent, spark discharge will occur. The high-temperature plasma generated by the spark discharge will cause micro-melting on the surface of the bearing steel ball, and combined with the abrasive grinding effect in the grinding fluid, high-efficiency, low-damage rapid precision grinding can be achieved.

[0065] Step S5: The grinding bearing steel balls are discharged from the outer edges of the upper and lower grinding discs, collected, cleaned with cleaning fluid, dried, and packaged.

[0066] The grinding method of this embodiment comprehensively utilizes multiple mechanisms such as mechanical grinding, electrolytic grinding, and spark erosion. Through the synergistic effect of high-speed rotation of the upper and lower grinding discs, high-frequency vibration, adaptive gap adjustment, and spark discharge, combined with the lubrication, insulation, and abrasive composite effects of the special grinding fluid, high precision, high efficiency, and low cost of bearing steel ball processing are achieved, and the product yield and processing accuracy are better than traditional processes. Spark-assisted grinding can effectively remove tiny protrusions and oxide layers on the surface of bearing steel balls, making the surface smoother and improving the service life of bearings. The grinding fluid can be reused and can be recycled after filtering and purification, reducing material consumption and waste liquid discharge.

[0067] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. A surface grinding device for machining bearing steel balls, characterized in that: The invention comprises an upper grinding disc (1) and a lower grinding disc (2) which are symmetrically arranged in an upper and lower direction, a driving disc (3) being rotatably connected between the upper grinding disc (1) and the lower grinding disc (2), an upper adjusting ring (4) and a lower adjusting ring (5) being fixedly connected at the ends of the upper grinding disc (1) and the lower grinding disc (2) which are away from each other, respectively, a reciprocating rotating shaft (6) being fixedly connected at the bottom end of the lower grinding disc (2), a plurality of vibration rods (7) being fixedly connected at the outer end of the reciprocating rotating shaft (6) located at the lower side of the lower adjusting ring (5), a vibration block (8) being fixedly connected between two adjacent vibration rods (7), a gear ring (9) being fixedly connected at the outer end of the driving disc (3), a gear ring (10) being meshingly connected at the outer end of the gear ring (9), and a bracket (11) being fixedly connected at the top end of the upper adjusting ring (4). ), the reciprocating rotating shaft (6) is rotatably connected to the bracket (11), the power shaft of the gear (10) passes through the bracket (11), and the passing portion is fixedly connected to a motor, the motor is electrically connected to a controller, the upper grinding disc (1), the lower grinding disc (2), the upper adjustment ring (4), the lower adjustment ring (5) and the plurality of vibration blocks (8) are all electrically connected to the controller, a grinding groove is formed at one end of the upper grinding disc (1) and the lower grinding disc (2) close to each other, and the grinding groove is a vortex structure, the center point of the vortex structure coincides with the axis of the upper grinding disc (1), the upper grinding disc (1) and the lower grinding disc (2) are both made of wear-resistant conductive material, and the lower grinding disc (2) can reciprocate at a high frequency under the action of the vibration block (8), and the rotation angle is between 0.01° and 0.05°.

2. A surface grinding device for machining a bearing steel ball according to claim 1, characterized in that: A feed hole is provided at the centre of the upper grinding disc (1) along its axial direction, and a feed pipe (12) is fixedly connected to the top of the upper grinding disc (1) at a position relative to the feed hole. The feed pipe (12) is a conical structure, and the end of the conical structure with a larger diameter is arranged away from the upper grinding disc (1).

3. A surface grinding device for machining a bearing steel ball according to claim 2, characterized in that: The driving disc (3) comprises a plurality of driving plates (13) distributed in a circular array around the axis of the upper grinding disc (1); the diameter of a circle formed by the mutually adjacent ends of the plurality of driving plates (13) is greater than the diameter of the feed hole on the upper grinding disc (1).

4. The surface grinding device for machining a bearing steel ball according to claim 3, characterized in that: One end of the plurality of drive plates (13) that is away from each other is clamped with a same drive ring (14) via a dovetail tenon, and the thickness of the drive ring (14) is equal to that of the drive plate (13).

5. The surface grinding device for machining a bearing steel ball according to claim 4, characterized in that: The top and bottom ends of the driving ring (14) are both fixedly connected to a driving fixing ring (15), and the outer ends of the driving ring (14) and the two driving fixing rings (15) are fixedly connected to the inner end of the same gear ring (9).

6. The surface grinding device for machining a bearing steel ball according to claim 3, characterized in that: The upper adjustment ring (4) and the lower adjustment ring (5) are both composed of a plurality of adjustment blocks (16), the plurality of adjustment blocks (16) are all made of piezoelectric material, and the direction of volume change of the piezoelectric material is parallel to the axial direction of the upper adjustment ring (4) and the lower adjustment ring (5).

7. A surface grinding device for machining a bearing steel ball according to claim 6, characterized in that: An adjustment ring fixing plate (17) is fixedly connected between the ends of the upper adjustment ring (4) and the lower adjustment ring (5) away from the driving disk (3) and the bracket (11), and a plurality of adjustment blocks (16) are evenly distributed around the axis of the adjustment ring fixing plate (17).

8. The surface grinding device for machining a bearing steel ball according to claim 1, characterized in that: The upper grinding disc (1) and the lower grinding disc (2) are both cylindrical structures, the plurality of vibration blocks (8) are all made of piezoelectric material, and the direction of volume change of the piezoelectric material is parallel to the direction of the circumference of the outer end of the lower grinding disc (2).

9. The surface grinding device for machining a bearing steel ball according to claim 1, characterized in that: A grinding liquid flows and is filled between the upper grinding disc (1) and the lower grinding disc (2). The grinding liquid is a water-based or oil-based insulating liquid, and abrasive is added to the grinding liquid.

10. The method for grinding a bearing steel ball using a surface grinding device for machining a bearing steel ball according to claim 6, characterized in that: The following steps are involved: S1. The bearing steel balls to be ground are fed into the feed pipe (12) at the top of the upper grinding disc (1). The bearing steel balls are driven by a plurality of driving plates (13) to move from the axis to the outer edge through the grinding groove between the upper grinding disc (1) and the lower grinding disc (2); S2, the controller controls the vibration block (8) to drive the lower grinding disc (2) to perform high-frequency reciprocating rotation, and the upper and lower grinding discs cooperate with the grinding fluid to grind the surface of the bearing steel ball; S3, the controller monitors the voltage changes of the upper adjustment ring (4) and the lower adjustment ring (5) in real time, calculates the force condition of the adjustment block (16), and when a force deviation of the upper and lower grinding discs is detected, energizes the corresponding adjustment block to cause its deformation to compensate for the deviation of the grinding disc; S4. The controller simultaneously energizes the upper grinding disc (1) and the lower grinding disc (2), so that electric spark discharge is formed between the upper grinding disc and the bearing steel balls, and the bearing steel balls are quickly ground with the aid of abrasive and high-frequency rotation until the bearing steel balls are discharged from the outer edges of the upper and lower grinding discs after grinding.

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