Ball controllable orbital transfer circulating mechanism for horizontal ball grinding machine and grinding method

Abstract

The invention belongs to the field of ball ultra-precision machining, and particularly relates to a ball controllable orbital transfer circulating mechanism for a horizontal ball grinding machine and a grinding method. According to the technical scheme, the ball controllable orbital transfer circulating mechanism for the horizontal ball grinding machine comprises a material disc, a ball outlet sliding rail and a ball inlet sliding rail, and the material disc, the ball outlet sliding rail and the ball inlet sliding rail are each of an upper-layer structure and a lower-layer structure; a grinding mechanism of the horizontal ball grinding machine comprises a flat plate and a grinding plate, a material plate is connected with the upper portion of the grinding plate through a ball outlet sliding rail, the material plate is connected with the lower portion of the grinding plate through a ball inlet sliding rail, and a circular conveying mechanism of balls is formed. According to the ball controllable orbital transfer circulating mechanism for the horizontal ball grinding machine and the grinding method, balls can be controllably and alternately ground in the inner grinding orbit and the outer grinding orbit, the grinding area envelope lines of the balls are roughly the same, the sphericity of products of the same batch is more uniform after the balls are machined, and the grinding quality is improved. And the equal cutting probability of the product is improved.

Description

Technical Field

[0001] The invention belongs to the field of sphere ultra-precision machining, and in particular relates to a sphere controllable track-changing circulation mechanism and a grinding method for a horizontal sphere grinding machine. Background Art

[0002] The ball is a key component in rolling bearings, and its sphericity and surface quality have a crucial impact on its life. At present, the batch processing of balls uses a cast iron disc with a V-groove and a flat disc for grinding. The traditional grinding machine type is a vertical ball grinder, and the processing methods can be divided into traditional concentric circle processing methods, eccentric circle V-groove processing methods, three-disc double rotation processing methods, and variable curvature variable curvature groove processing methods. The traditional concentric circle processing method is most widely used in engineering production and can be processed in large quantities, but its shortcomings are also particularly obvious. The rotation axis and revolution axis of the ball in the V-groove do not change, that is, the ball moves along the fixed rotation axis and revolution axis in the V-groove, and the grinding track of the ball surface obtained is three rings, which is not conducive to uniform grinding of the ball surface. The eccentric V-groove processing method changes the radius of curvature of any point on the V-groove relative to the center of the grinding disc. The rotation angle of the sphere is changed by changing the radius of curvature. Compared with the traditional concentric circle processing method, the three circular rings of the processing trajectory become three ring belts. However, the existence of eccentricity will also affect the force on the sphere. The pressure received by the sphere during the grinding process is not uniform, which will affect the processing accuracy of the sphere. The three-disc double-rotation processing method adjusts the orientation of the sphere's rotation axis by changing the rotation speed of the inner and outer turntables to control the spherical grinding path. The processing trajectory of the sphere surface almost evenly covers most of the area. The disadvantages are that the equipment has high coaxiality requirements, multiple drives, complex structure and control system, and the grinding disc has only one groove, which is not suitable for batch processing. Although the variable curvature groove processing method can achieve full envelope of the grinding trajectory, its structure is complex and not suitable for engineering.

[0003] The circulation mechanism of the vertical ball grinder is complex and inefficient, so a horizontal ball grinder is proposed. Compared with the circulation mechanism of the vertical ball grinder, its circulation mechanism is simple in structure, easy to install, and has higher circulation efficiency.

[0004] As attached Figure 8As shown, the horizontal ball grinder includes a driving mechanism, a grinding mechanism, and a pressurizing mechanism. The grinding mechanism has a flat plate and a grinding plate. The flat plate is connected to the driving mechanism, and the grinding plate is connected to the pressurizing mechanism. The advantages of the horizontal ball grinder are large ball loading capacity, convenient cycle grinding, and high cycle efficiency of the circulation mechanism. However, there are also problems with the circulation system of the horizontal ball grinder. After the processed balls flow out of the ball outlet and pass through the circulation system, they flow into the grinding plate again through the ball inlet for processing. This process cannot ensure that the grinding stroke of all processed balls is roughly the same. The grinding stroke is random, which will cause the probability of equal cutting of the same batch of processed balls to differ too much, which is not conducive to the uniform grinding of the same batch of processed balls. Summary of the invention

[0005] The present invention provides a ball controllable track-changing circulation mechanism and a grinding method for a horizontal ball grinding machine, which enable the ball to be controllably alternately ground in an inner grinding track and an outer grinding track, so that the grinding area envelopes experienced by the ball are roughly the same, so that the sphericity of the same batch of products after processing is more uniform, and the probability of equal cutting of the products is improved.

[0006] The technical solution of the present invention is as follows:

[0007] The ball controllable track-changing circulation mechanism for a horizontal ball grinder comprises a material tray, a ball-discharging slide rail and a ball-scoring slide rail, wherein the material tray, the ball-discharging slide rail and the ball-scoring slide rail are all two-layer structures; the grinding mechanism of the horizontal ball grinder comprises a flat plate and a grinding plate, wherein the material tray is connected to the upper part of the grinding plate through the ball-discharging slide rail, and the material tray is connected to the lower part of the grinding plate through the ball-scoring slide rail, thereby forming a circulating conveying mechanism for the ball.

[0008] Furthermore, the ball controllable track changing circulation mechanism for the horizontal ball grinding machine, the material tray includes an upper tray and a lower tray, the upper tray is provided with an upper tray ball inlet and an upper tray ball outlet, and the lower tray is provided with a lower tray ball inlet and a lower tray ball outlet.

[0009] Furthermore, in the controllable track-changing circulation mechanism for the horizontal ball grinding machine, the upper disk is provided with an upper stopper, one end of the upper stopper is located at the center of the upper disk, and the other end is located between the upper disk ball inlet and the upper disk ball outlet; the lower disk is provided with a lower stopper, one end of the lower stopper is located at the center of the lower disk, and the other end is located between the lower disk ball inlet and the lower disk ball outlet.

[0010] Furthermore, in the ball controllable track-changing circulation mechanism for the horizontal ball grinding machine, a circular rotating disk is provided at the bottom of both the upper disk and the lower disk, and the circular rotating disk is driven by a motor to provide power for the circulation of the ball.

[0011] Furthermore, in the ball controllable track changing circulation mechanism for the horizontal ball grinding machine, the ball outlet slide rail comprises an upper ball outlet slide rail and a lower ball outlet slide rail, the lower end of the upper ball outlet slide rail is connected to the upper disc ball inlet, and the lower end of the lower ball outlet slide rail is connected to the lower disc ball inlet.

[0012] Furthermore, the ball controllable track changing circulation mechanism for the horizontal ball grinding machine, the goal slide includes an upper goal slide and a lower goal slide, the upper end of the upper goal slide is connected to the ball outlet of the upper disk, and the upper end of the lower goal slide is connected to the ball outlet of the lower disk.

[0013] Furthermore, in the controllable track-changing circulation mechanism for a horizontal ball grinder, the end face of the grinding disc is provided with a grinding track, and the grinding track is distributed in a state of uniform expansion outward with the center point of the grinding disc as the center; the grinding track is divided into an inner grinding track and an outer grinding track, the number of inner grinding track circles = the total number of grinding track circles / 2, and the number of outer grinding track circles = the total number of grinding track circles / 2; when the total number of grinding track circles is an odd number, the number of inner grinding track circles = the total number of grinding track circles / 2 and rounded up, and the number of outer grinding track circles = the total number of grinding track circles / 2 and rounded down.

[0014] Furthermore, the ball controllable track changing circulation mechanism for the horizontal ball grinder, the grinding disc is provided with an upper ball inlet and outlet channel and a lower ball inlet and outlet channel, the upper ball inlet and outlet channel and the lower ball inlet and outlet channel penetrate from the outside to the inside to the center of the grinding disc; a first baffle and a second baffle are provided in the upper ball inlet and outlet channel, the first baffle is arranged at the outlet of multiple outer grinding tracks, and the space between the first baffle and the outlet of the outer grinding tracks forms the outer grinding track ball outlet channel; the second baffle is arranged at the outlet of multiple inner grinding tracks and beside the first baffle, and the space between the second baffle and the outlet of the inner grinding track and the first baffle forms the inner grinding track ball outlet channel; a third baffle is provided in the lower ball inlet and outlet channel; the third baffle is arranged at the entrance of multiple outer grinding tracks, and the space between the third baffle and the entrance of multiple outer grinding tracks forms the outer grinding track ball outlet channel; the remaining space of the lower ball inlet and outlet channel separated by the third baffle forms the inner grinding track ball outlet channel; the inclination angle of the first baffle, the second baffle and the third baffle is 2°.

[0015] Furthermore, in the ball controllable track changing circulation mechanism for the horizontal ball grinder, the outlet of the outer grinding track ball outlet is connected to the upper end of the upper ball outlet slide rail, the outlet of the inner grinding track ball outlet is connected to the upper end of the lower ball outlet slide rail, the inlet of the inner grinding track ball outlet is connected to the lower end of the upper ball outlet slide rail, and the inlet of the outer grinding track ball outlet is connected to the lower end of the lower ball outlet slide rail.

[0016] The ball controllable track changing circulation grinding method of the horizontal ball grinding machine utilizes the ball controllable track changing circulation mechanism for the horizontal ball grinding machine, and the specific steps are as follows:

[0017] Step 1, turning on the motor to drive the circular rotating disk to rotate counterclockwise, so that the balls in the upper disk and the lower disk are transported to the grinding disk through the ball slide rail;

[0018] Step 2, turning on the driving mechanism of the horizontal ball grinder to drive the flat plate of the grinding mechanism to rotate; turning on the pressurizing mechanism of the horizontal ball grinder to pressurize the grinding plate to grind the ball;

[0019] Step 3, the ball after grinding on the outer grinding track goes out of the outer grinding track and enters the upper plate through the upper ball-out slide rail; then the round turntable rotates counterclockwise, and the ball passes through the upper ball-in slide rail, passes through the inner grinding track, enters the ball-in slide rail, and enters the inner grinding track;

[0020] Step 4, the ball after grinding on the inner grinding track goes out of the inner grinding track and enters the lower disk through the lower ball exit slide rail; then the circular turntable rotates counterclockwise, and the ball passes through the lower ball entry slide rail, passes through the outer grinding track, enters the ball entry channel, and enters the outer grinding track;

[0021] Step 5: The ball is ground once on both the inner grinding track and the outer grinding track, which is a grinding cycle; the operation is repeated repeatedly to complete the controllable track-changing cyclic grinding process of the ball, and the ball is taken out after it is qualified.

[0022] The beneficial effects of the present invention are as follows: the controllable track-changing circulation mechanism for the ball used in the horizontal ball grinder of the present invention has a simple and compact structure, and can controllably alternately grind the ball in the inner grinding track and the outer grinding track, effectively controlling the randomness of the track-changing during the cycle, and effectively reducing the randomness of the grinding stroke, so that the grinding area envelope experienced by the ball is roughly the same, so that the sphericity of the same batch of products after processing is more uniform, and the probability of equal cutting of the product is improved. The present invention can control the grinding stroke of the ball within a certain range, so that it enters the expected grinding track as expected. The method of the present invention is simple to operate, low in production cost, and greatly improves the probability of equal cutting of the processed ball. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of a ball controllable track changing circulation mechanism for a horizontal ball grinding machine;

[0024] Figure 2 It is a right view of a ball controllable track changing circulation mechanism for a horizontal ball grinding machine;

[0025] Figure 3 for Figure 2 Middle AA section view;

[0026] Figure 4 Schematic diagram of the feed tray;

[0027] Figure 5This is a schematic diagram of the ball-out slide rail;

[0028] Figure 6 This is a schematic diagram of the goal slide;

[0029] Figure 7 is a schematic diagram of a grinding disc;

[0030] Figure 8 It is a schematic diagram of a horizontal ball grinder; wherein 1 is a flat plate, 2 is a grinding plate, 9 is a driving mechanism, and 10 is a pressurizing mechanism. DETAILED DESCRIPTION

[0031] like Figure 1-8 As shown, the ball controllable track-changing circulation mechanism for the horizontal ball grinder includes a feed tray 3, a ball outlet slide 4 and a goal slide 5, and the feed tray 3, the ball outlet slide 4 and the goal slide 5 are all two-layer structures; the grinding mechanism of the horizontal ball grinder includes a flat plate 1 and a grinding plate 2, the feed tray 3 is connected to the upper part of the grinding plate 2 through the ball outlet slide 4, and the feed tray 3 is connected to the lower part of the grinding plate 2 through the goal slide 5, forming a circulation conveying mechanism for the ball.

[0032] The material tray 3 includes an upper tray 11 and a lower tray 12. The upper tray 11 is provided with an upper tray ball inlet 21 and an upper tray ball outlet 22, and the lower tray 12 is provided with a lower tray ball inlet 23 and a lower tray ball outlet 24. The upper tray 11 is provided with an upper stopper 8, one end of which is located at the center of the upper tray 11 and the other end is located between the upper tray ball inlet 21 and the upper tray ball outlet 22; the lower tray 12 is provided with a lower stopper, one end of which is located at the center of the lower tray 12 and the other end is located between the lower tray ball inlet 23 and the lower tray ball outlet 24. The bottoms of the upper tray 11 and the lower tray 12 are both provided with a circular rotating disk, which is driven by a motor to provide power for the circulation of the balls.

[0033] The ball-discharging slide rail 4 includes an upper ball-discharging slide rail 13 and a lower ball-discharging slide rail 14. The lower end of the upper ball-discharging slide rail 13 is connected to the upper disc ball-discharging opening 21, and the lower end of the lower ball-discharging slide rail 14 is connected to the lower disc ball-discharging opening 23. The goal-scoring slide rail 5 includes an upper goal-scoring slide rail 15 and a lower goal-scoring slide rail 16. The upper end of the upper goal-scoring slide rail 15 is connected to the upper disc ball-discharging opening 22, and the upper end of the lower goal-scoring slide rail 16 is connected to the lower disc ball-discharging opening 24.

[0034] The end surface of the grinding disc 2 is provided with a grinding track, which is distributed in a state of uniform expansion outward with the center point of the grinding disc 2 as the center, and the total number of grinding tracks is 6; the grinding track is divided into an inner grinding track and an outer grinding track, the number of inner grinding tracks is 3, and the number of outer grinding tracks is 3.

[0035] The grinding disc 2 is provided with an upper ball inlet and outlet channel and a lower ball inlet and outlet channel, and the upper ball inlet and outlet channel and the lower ball inlet and outlet channel penetrate from the outside to the inside to the center of the grinding disc 2; a first baffle 31 and a second baffle 32 are provided in the upper ball inlet and outlet channel, and the first baffle 31 is arranged at the outlet of multiple outer grinding tracks, and the space between the first baffle 31 and the outlet of the outer grinding track forms an outer grinding track ball outlet channel 6; the second baffle 32 is arranged at the outlet of multiple inner grinding tracks and beside the first baffle 31, and the second baffle 32 and the outlet of the inner grinding track are connected. The space between the opening and the first baffle plate 31 forms an inner grinding track ball outlet channel 34; a third baffle plate 33 is provided in the lower ball inlet and outlet channel, and the third baffle plate 33 is arranged at the inlet of multiple outer grinding tracks, and the space between the third baffle plate 33 and the inlet of multiple outer grinding tracks forms an outer grinding track ball outlet channel 35; the remaining space of the lower ball inlet and outlet channel separated by the third baffle plate 33 forms an inner grinding track ball outlet channel 7; the inclination angle of the first baffle plate 31, the second baffle plate 32 and the third baffle plate 33 is 2°, which makes the ball in and out smoother and prevents the ball from piling up.

[0036] The outlet of the outer grinding track ball outlet channel 6 is connected to the upper end of the upper ball outlet slide rail 13, the outlet of the inner grinding track ball outlet channel 34 is connected to the upper end of the lower ball outlet slide rail 14, the inlet of the inner grinding track ball outlet channel 7 is connected to the lower end of the upper ball outlet slide rail 15, and the inlet of the outer grinding track ball outlet channel 35 is connected to the lower end of the lower ball outlet slide rail 16.

[0037] The ball controllable track changing circulation grinding method of the horizontal ball grinding machine utilizes the ball controllable track changing circulation mechanism for the horizontal ball grinding machine, and the specific steps are as follows:

[0038] Step 1, turn on the motor to drive the circular rotating disc to rotate counterclockwise, so that the balls in the upper disc 11 and the lower disc 12 are transported to the grinding disc 2 through the ball slide rail 5;

[0039] Step 2, turning on the driving mechanism 9 of the horizontal ball grinder to drive the flat plate 1 of the grinding mechanism to rotate; turning on the pressurizing mechanism 10 of the horizontal ball grinder to pressurize the grinding plate 2 to perform ball grinding;

[0040] Step 3, the ball after grinding on the outer grinding track goes from the outer grinding track ball channel 6 through the upper ball outlet slide rail 13 into the upper disk 11; then the circular turntable rotates counterclockwise, the ball enters the upper disk ball outlet 22, passes through the upper ball entry slide rail 15 under the action of gravity, passes through the inner grinding track ball channel 7 and enters the inner grinding track;

[0041] Step 4, the ball after grinding on the inner grinding track goes from the inner grinding track ball channel 34 through the lower ball channel 14 into the lower disk 12; then the circular turntable rotates counterclockwise, the ball enters the lower disk ball outlet 24, passes through the lower ball channel 16 under the action of gravity, passes through the outer grinding track ball channel 35 and enters the outer grinding track;

[0042] Step 5: The ball is ground once on both the inner grinding track and the outer grinding track, which is a grinding cycle; the operation is repeated repeatedly to complete the controllable track-changing cyclic grinding process of the ball, and the ball is taken out after it is qualified.

Claims

1. A ball controllable track changing circulation mechanism for a horizontal ball grinding machine, characterized in that: It includes a material tray, a ball outlet slide and a goal slide, and the material tray, the ball outlet slide and the goal slide are all two-layer structures; the grinding mechanism of the horizontal ball grinder includes a flat plate and a grinding plate, the material tray is connected to the upper part of the grinding plate through the ball outlet slide, and the material tray is connected to the lower part of the grinding plate through the goal slide, forming a circulating conveying mechanism for the balls.

2. The ball controllable track changing circulation mechanism for a horizontal ball grinding machine according to claim 1, characterized in that: The material tray comprises an upper tray and a lower tray. The upper tray is provided with an upper tray ball inlet and an upper tray ball outlet, and the lower tray is provided with a lower tray ball inlet and a lower tray ball outlet.

3. The ball controllable track changing circulation mechanism for a horizontal ball grinding machine according to claim 2, characterized in that: The upper disk is provided with an upper stopper, one end of which is located at the center of the upper disk, and the other end is located between the upper disk ball inlet and the upper disk ball outlet; the lower disk is provided with a lower stopper, one end of which is located at the center of the lower disk, and the other end is located between the lower disk ball inlet and the lower disk ball outlet.

4. The ball controllable track changing circulation mechanism for a horizontal ball grinding machine according to claim 2, characterized in that: A circular rotating disk is provided at the bottom of both the upper disk and the lower disk. The circular rotating disk is driven by a motor to provide power for the circulation of the sphere.

5. The ball controllable track changing circulation mechanism for a horizontal ball grinding machine according to claim 2, characterized in that: The ball-out slide rail comprises an upper ball-out slide rail and a lower ball-out slide rail, wherein the lower end of the upper ball-out slide rail is connected to the upper ball-inlet, and the lower end of the lower ball-out slide rail is connected to the lower ball-inlet.

6. The ball controllable track changing circulation mechanism for a horizontal ball grinding machine according to claim 5, characterized in that: The goal slide rail comprises an upper goal slide rail and a lower goal slide rail, the upper end of the upper goal slide rail is connected to the ball outlet of the upper plate, and the upper end of the lower goal slide rail is connected to the ball outlet of the lower plate.

7. The ball controllable track changing circulation mechanism for a horizontal ball grinding machine according to claim 6, characterized in that: A grinding track is provided on the end surface of the grinding disc, and the grinding track is distributed in a state of uniform expansion outward with the center point of the grinding disc as the center of the circle; the grinding track is divided into an inner grinding track and an outer grinding track, the number of inner grinding track circles = the total number of grinding track circles / 2, and the number of outer grinding track circles = the total number of grinding track circles / 2; when the total number of grinding track circles is an odd number, the number of inner grinding track circles = the total number of grinding track circles / 2 and rounded up, and the number of outer grinding track circles = the total number of grinding track circles / 2 and rounded down.

8. The ball controllable track changing circulation mechanism for a horizontal ball grinding machine according to claim 7, characterized in that: The grinding disc is provided with an upper ball inlet and outlet channel and a lower ball inlet and outlet channel, which penetrate from the outside to the inside to the center of the grinding disc; a first baffle and a second baffle are provided in the upper ball inlet and outlet channel, the first baffle is provided at the exit of a plurality of outer grinding tracks, and the space between the first baffle and the exit of the outer grinding track forms an outer grinding track ball outlet channel; The second baffle is arranged at the exit of the plurality of inner grinding tracks and beside the first baffle, and the space between the second baffle and the exit of the inner grinding tracks and the first baffle forms the ball exit channel of the inner grinding tracks; the third baffle is arranged in the lower ball inlet and outlet channel; the third baffle is arranged at the entrance of the plurality of outer grinding tracks, and the space between the third baffle and the entrance of the plurality of outer grinding tracks forms the ball entry channel of the outer grinding tracks; The remaining space of the lower ball inlet and outlet channel separated by the third baffle plate forms the inner grinding track ball channel; the inclination angle of the first baffle plate, the second baffle plate and the third baffle plate is 2°.

9. The ball controllable track changing circulation mechanism for a horizontal ball grinding machine according to claim 8, characterized in that: The outlet of the outer grinding track ball channel is connected to the upper end of the upper ball outlet slide rail, the outlet of the inner grinding track ball channel is connected to the upper end of the lower ball outlet slide rail, the inlet of the inner grinding track ball channel is connected to the lower end of the upper ball channel, and the inlet of the outer grinding track ball channel is connected to the lower end of the lower ball channel.

10. A ball controllable track changing circulation grinding method for a horizontal ball grinding machine, characterized in that: Using the ball controllable track changing circulation mechanism for a horizontal ball grinding machine as claimed in any one of claims 1 to 9, the specific steps are as follows: Step 1, turning on the motor to drive the circular rotating disk to rotate counterclockwise, so that the balls in the upper disk and the lower disk are transported to the grinding disk through the ball slide rail; Step 2, turning on the driving mechanism of the horizontal ball grinder to drive the flat plate of the grinding mechanism to rotate; turning on the pressurizing mechanism of the horizontal ball grinder to pressurize the grinding plate to grind the ball; Step 3, the ball after grinding on the outer grinding track goes out of the outer grinding track and enters the upper plate through the upper ball-out slide rail; then the round turntable rotates counterclockwise, and the ball passes through the upper ball-in slide rail, passes through the inner grinding track, enters the ball-in slide rail, and enters the inner grinding track; Step 4, the ball after grinding on the inner grinding track goes out of the inner grinding track and enters the lower disk through the lower ball exit slide rail; then the circular turntable rotates counterclockwise, and the ball passes through the lower ball entry slide rail, passes through the outer grinding track, enters the ball entry channel, and enters the outer grinding track; Step 5: The ball is ground once on both the inner grinding track and the outer grinding track, which is a grinding cycle; the operation is repeated repeatedly to complete the controllable track-changing cyclic grinding process of the ball, and the ball is taken out after it is qualified.

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