Four-point contact superfinishing machine ball bearing preparation process

Abstract

The invention relates to the technical field of bearing machining, in particular to a four-point contact superfinishing machine ball bearing manufacturing technology which comprises a positioning mechanism, a receiving device is rotationally installed at the bottom end in the positioning mechanism, a transmission device is fixedly installed on the right side in the positioning mechanism, and the positioning mechanism comprises a feeding device and a driving part. The feeding device is fixedly mounted in the driving part and comprises a feeding cavity, a first photoelectric sensor, a contact disc, a plugging plate, a second photoelectric sensor, a contact block, a displacement transverse plate, a first spring, extension rods and an electromagnetic chuck, and the extension rods are symmetrically and fixedly mounted at the bottom of the front end of the feeding cavity; the second photoelectric sensor is fixedly installed at the end, away from the feeding cavity, of the extension rod, the displacement transverse plate is slidably connected to the extension rod in a sleeving mode, and the first springs are symmetrically and fixedly installed between the displacement transverse plate and the feeding cavity. According to the four-point contact type superfinishing machine, the positioning mechanism is arranged, so that the aims of performing alignment type accurate feeding and synchronous material receiving when the four-point contact type superfinishing machine is used are fulfilled.

Description

Technical Field

[0001] The present invention relates to the technical field of bearing processing, specifically to the preparation process of four-point contact super-precision spherical bearings Background Art

[0002] A spherical bearing is a type of rolling bearing. The spherical balls are installed between the inner steel ring and the outer steel ring, which can bear a large load, and is also called a ball bearing.

[0003] The four-point contact super-precision machine is a high-precision surface processing equipment, mainly used for the super-precision grinding of precision parts such as bearings, automotive parts, and hydraulic components. Its core feature is to uniformly grind the workpiece with four contact points. Compared with traditional single-point or double-point super-precision machines, it can significantly improve the processing accuracy, surface quality, and efficiency.

[0004] Currently, when the four-point contact super-precision machine on the market processes the outer sleeve of the spherical bearing, since the four grinding heads are distributed around the fixture, it is interfered by the grinding heads during feeding, making it inconvenient to install the bearing sleeve for grinding work. As a result, the existing four-point contact super-precision machine cannot perform the work of alignment-type precise feeding and synchronous material receiving during use. Therefore, an equipment is needed to improve the above problems. Summary of the Invention

[0005] In view of the problems in the prior art, the present invention provides a preparation process for four-point contact super-precision spherical bearings.

[0006] The technical solution adopted by the present invention to solve its technical problems is: a preparation process for four-point contact super-precision spherical bearings, including a positioning mechanism. A receiving device is rotatably installed at the bottom end inside the positioning mechanism, and a transmission device is fixedly installed on the right side inside the positioning mechanism. The positioning mechanism includes a feeding device and a driving component. The feeding device is fixedly installed inside the driving component. The feeding device includes a feeding cavity, a first photoelectric sensor, a contact disc, a sealing plate, a second photoelectric sensor, a contact block, a displacement cross plate, a first spring, an extension rod, and an electromagnetic chuck. The extension rods are symmetrically fixedly installed at the bottom front end of the feeding cavity. The second photoelectric sensor is fixedly installed at the end of the extension rod away from the feeding cavity. The displacement cross plate is slidably sleeved on the extension rod. The first springs are symmetrically fixedly installed between the displacement cross plate and the feeding cavity. The contact blocks are fixedly installed at the top ends of both ends of the displacement cross plate. The sealing plate is fixedly installed at the center of the top end of the displacement cross plate. The contact disc is fixedly installed at the top front end of the sealing plate. The first photoelectric sensor is fixedly installed at the front end of the feeding cavity and is located above the sealing plate. The electromagnetic chuck is fixedly installed at the rear end of the sealing plate.

[0007] Specifically, the receiving device includes a first gear, a vertical rod, and a receiving cavity. The receiving cavity is fixedly installed on the outer circle of the vertical rod. The first gear is fixedly installed at the top of the vertical rod. The transmission device includes a first special-shaped bracket, a contact rod, a second special-shaped bracket, and a rack. The rack is fixedly installed at the bottom end of the second special-shaped bracket. The second special-shaped bracket is fixedly installed at the front end of the first special-shaped bracket. The contact rod is fixedly installed at the bottom end of the first special-shaped bracket away from the second special-shaped bracket.

[0008] Specifically, the driving component includes an alignment device and a support device. The alignment device is symmetrically and fixedly installed inside the support device.

[0009] Specifically, the alignment device includes a chassis, an extension arm, a first piston rod, an air cylinder, a support base plate, a second spring, an L-shaped bracket, a hexagonal rod, a second piston rod, a third spring, a push rod, and a blocking frame. The hexagonal rod is fixedly installed at the front end of the L-shaped bracket. The support base plate is slidably sleeved on the outer circle of the hexagonal rod. The second spring is fixedly installed between the support base plate and the L-shaped bracket. The air cylinder is fixedly installed at the bottom end of the support base plate. The second piston rod is slidably inserted into the rear end interior of the air cylinder. The first piston rod is slidably inserted into the front end interior of the air cylinder. The extension arm is rotatably installed at the front end of the first piston rod. The blocking frame is rotatably installed at the top side end of the extension arm. The push rod is fixedly installed at the bottom end of the blocking frame away from the extension arm. The third spring is fixedly installed between the extension arm and the push rod. The chassis is fixedly installed at the bottom end of the extension arm.

[0010] Specifically, the support device includes a grinding device, a unit housing, a clamping device, a second gear, a connecting rope, a winding wheel, a third photoelectric sensor, a cam, a third gear, and a control system. The control system is fixedly installed at the rear of the interior of the unit housing. The grinding device is fixedly installed at the front end of the control system and is symmetrically arranged. The clamping device is arranged at the center of the front end of the control system. The third gear is fixedly installed on both sides of the control system. The cam is fixedly installed at the side end of the third gear away from the control system. The third photoelectric sensor is fixedly installed at the bottom of the side end of the control system. The second gear is rotatably installed in front of both sides of the control system. The winding wheel is fixedly installed at the center of the side end of the second gear. The connecting rope is fixedly installed on the outer circle of the winding wheel.

[0011] Specifically, the vertical rod is rotatably installed at the bottom right of the unit housing. The second special-shaped bracket is fixedly installed at the side end of the support base plate. The L-shaped bracket is fixedly installed at the top ends of both sides of the control system. The feed cavity is fixedly installed at the front end of the control system. Both ends of the displacement cross plate are connected to the connecting rope.

[0012] Specifically, the rack is horizontally aligned with the first gear. The front end of the contact rod is arranged in an arc shape. The contact rod is horizontally aligned with the rear end of the cam. The tooth angle distribution of the third gear is 180°.

[0013] Specifically, the top of the rear end of the contact block is inclined at 45°. The contact block is vertically aligned with the chassis. Both the first photoelectric inductor and the second photoelectric inductor are wirelessly connected to the electromagnetic chuck.

[0014] Specifically, the feed cavity further includes a support top frame, a feed disk, and a hydraulic cylinder. The support top frame is fixedly installed at the top end of the feed cavity. The hydraulic cylinder is fixedly installed at the front end of the support top frame. The feed disk is fixedly installed at the rear end of the hydraulic cylinder.

[0015] The preparation process of a four-point contact super-precision machine ball bearing includes the following steps:

[0016] S1. Material pretreatment: Eliminate internal defects, refine grains, and perform ultrasonic flaw detection: Detect internal cracks or inclusions in the material;

[0017] S2. Precision turning: Use diamond tools or CBN tools to machine structures such as raceways and ribs. The surface roughness is ≤Ra 0.4μm;

[0018] S3. Heat treatment: Quench the workpiece (oil quench at 840 - 860°C) and then immediately cryogenically cool it (-70 - -196°C) to reduce retained austenite (≤3%). Subsequently, perform low-temperature tempering at 150 - 180°C for heat preservation to eliminate stress and maintain hardness;

[0019] S4. Super-finishing: Operate the oilstone in the four-point contact super-precision machine to oscillate and grind the workpiece, reducing the roughness to Ra0.01 - 0.05μm;

[0020] S5. Surface treatment: Perform DLC process on the workpiece to coat the surface of the workpiece and extend its lifespan;

[0021] S6. Assembly and inspection: Assemble in a clean room to avoid dust pollution. At the same time, control the pre-tightening force with a torque wrench. Subsequently, use a roundness instrument to perform the final roundness inspection of the raceway.

[0022] The beneficial effects of the present invention:

[0023] 1. When the third gear rotates in the present invention, it can drive the winding wheel to rotate. Moreover, the winding wheel can pull and displace the displacement cross plate through the connecting rope, so that the electromagnetic chuck can adsorb the bearing sleeve and move it out of the inside of the feeding cavity. At the same time, when the electromagnetic chuck moves the bearing sleeve to the clamping device, the electromagnetic chuck can release the bearing sleeve, enabling the bearing sleeve to be installed and placed. And, the first spring will drive the sealing plate to reset, so that the electromagnetic chuck can adsorb the bearing sleeve inside the feeding cavity again, completing the work of accurately positioning and placing the bearing sleeve.

[0024] 2. When the third gear rotates in the present invention, it can drive the cam to rotate until it contacts the third photoelectric inductor, thereby starting the grinding device and the clamping device to process the bearing sleeve. Subsequently, the cam can squeeze the contact rod to displace backward, causing the rack to pass through the first gear and driving the receiving cavity to rotate to the lower part of the clamping device. And, when the support bottom plate displaces, it can drive the push rod to pass through the bearing sleeve. Subsequently, when the second piston rod contacts the grinding device, the extension arm can drive the push rod to displace forward, pushing the processed bearing sleeve forward and dropping it into the inside of the receiving cavity, completing the work of synchronously receiving materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be further described below in conjunction with the drawings and embodiments.

[0026] Figure 1 It is a front perspective three-dimensional structure schematic diagram of the main body in the present invention;

[0027] Figure 2 It is a front perspective three-dimensional structure schematic diagram of the receiving device in the present invention;

[0028] Figure 3 It is a front perspective three-dimensional structure schematic diagram of the transmission device in the present invention;

[0029] Figure 4 It is a front perspective three-dimensional structure schematic diagram of the positioning mechanism in the present invention;

[0030] Figure 5 It is a partial sectional view of the feeding device in the present invention;

[0031] Figure 6 It is a front perspective three-dimensional structure schematic diagram of the driving component in the present invention;

[0032] Figure 7 It is a rear perspective three-dimensional structure schematic diagram of the alignment device in the present invention;

[0033] Figure 8 It is a front perspective three-dimensional structure schematic diagram of the support device in the present invention;

[0034] Figure 9 In the present invention Figure 8Partial enlarged schematic view of part A;

[0035] Figure 10 This is a perspective three-dimensional structure schematic view of the front view of the second embodiment of the feed cavity in the present invention.

[0036] In the figure: 1 - receiving device, 2 - transmission device, 3 - positioning mechanism, 4 - first gear, 5 - vertical rod, 6 - receiving cavity, 7 - first special-shaped bracket, 8 - contact rod, 9 - second special-shaped bracket, 10 - rack, 11 - feeding device, 12 - driving component, 13 - feed cavity, 14 - first photoelectric inductor, 15 - contact disc, 16 - sealing plate, 17 - second photoelectric inductor, 18 - contact block, 19 - displacement cross plate, 20 - first spring, 21 - extension rod, 22 - electromagnetic chuck, 23 - alignment device, 24 - support device, 25 - chassis, 26 - extension arm, 27 - first piston rod, 28 - air cylinder, 29 - support bottom plate, 30 - second spring, 31 - L-shaped bracket, 32 - hexagonal rod, 33 - second piston rod, 34 - third spring, 35 - pushing rod, 36 - blocking frame, 37 - grinding device, 38 - unit housing, 39 - clamping device, 40 - second gear, 41 - connecting rope, 42 - winding wheel, 43 - third photoelectric inductor, 44 - cam, 45 - third gear, 46 - control system, 47 - support top frame, 48 - feed disc, 49 - hydraulic cylinder. Detailed implementation manners

[0037] In order to enable those skilled in the art to better understand the solution of this application, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of this application.

[0038] The present invention will be further described below in conjunction with the accompanying drawings.

[0039] Embodiment 1

[0040] As Figure 1 , Figure 4 and Figure 5As shown in the figure, the preparation process of the four-point contact ultra-precision machine ball bearing of the present invention includes a positioning mechanism 3. At the inner bottom end of the positioning mechanism 3, a receiving device 1 is rotatably installed. On the right side inside the positioning mechanism 3, a transmission device 2 is fixedly installed. The positioning mechanism 3 includes a feeding device 11 and a driving component 12. The feeding device 11 is fixedly installed inside the driving component 12. The feeding device 11 includes a feeding cavity 13, a first photoelectric inductor 14, a contact disc 15, a sealing plate 16, a second photoelectric inductor 17, a contact block 18, a displacement cross plate 19, a first spring 20, an extension rod 21, and an electromagnetic chuck 22. The extension rods 21 are symmetrically fixedly installed at the front bottom end of the feeding cavity 13. The second photoelectric inductor 17 is fixedly installed at one end of the extension rod 21 away from the feeding cavity 13. The displacement cross plate 19 is slidably sleeved on the extension rod 21. The first springs 20 are symmetrically fixedly installed between the displacement cross plate 19 and the feeding cavity 13. The contact blocks 18 are fixedly installed at the top ends of both ends of the displacement cross plate 19. The sealing plate 16 is fixedly installed at the center of the top end of the displacement cross plate 19. The contact disc 15 is fixedly installed at the top of the front end of the sealing plate 16. The first photoelectric inductor 14 is fixedly installed at the front end of the feeding cavity 13, and the first photoelectric inductor 14 is located above the sealing plate 16. The electromagnetic chuck 22 is fixedly installed at the rear end of the sealing plate 16.

[0041] As Figure 2 , the receiving device 1 includes a first gear 4, a vertical rod 5, and a receiving cavity 6. The receiving cavity 6 is fixedly installed on the outer ring of the vertical rod 5. The first gear 4 is fixedly installed at the top end of the vertical rod 5. The transmission device 2 includes a first special-shaped bracket 7, a contact rod 8, a second special-shaped bracket 9, and a rack 10. The rack 10 is fixedly installed at the bottom end of the second special-shaped bracket 9. The second special-shaped bracket 9 is fixedly installed at the front end of the first special-shaped bracket 7. The contact rod 8 is fixedly installed at the bottom end of the first special-shaped bracket 7 away from the second special-shaped bracket 9. When the rack 10 moves, it can drive the first gear 4 and the receiving cavity 6 to rotate synchronously.

[0042] As Figure 6 , the driving component 12 includes an alignment device 23 and a support device 24. The alignment devices 23 are symmetrically fixedly installed inside the support device 24, which can support the alignment device 23 to work.

[0043] As Figure 7, the alignment device 23 includes a chassis 25, an extension arm 26, a first piston rod 27, a cylinder 28, a support base plate 29, a second spring 30, an L-shaped bracket 31, a hexagonal rod 32, a second piston rod 33, a third spring 34, a push rod 35 and a blocking frame 36. The hexagonal rod 32 is fixedly installed at the front end of the L-shaped bracket 31. The support base plate 29 is slidably sleeved on the outer circle of the hexagonal rod 32. The second spring 30 is fixedly installed between the support base plate 29 and the L-shaped bracket 31. The cylinder 28 is fixedly installed at the bottom end of the support base plate 29. The second piston rod 33 is slidably inserted into the rear end interior of the cylinder 28. The first piston rod 27 is slidably inserted into the front end interior of the cylinder 28. The extension arm 26 is rotatably installed at the front end of the first piston rod 27. The blocking frame 36 is rotatably installed at the top side end of the extension arm 26. The push rod 35 is fixedly installed at the bottom end of the blocking frame 36 away from the extension arm 26. The third spring 34 is fixedly installed between the extension arm 26 and the push rod 35. The chassis 25 is fixedly installed at the bottom end of the extension arm 26. A retaining piece is provided at the rear end of the blocking frame 36, which can prevent the push rod 35 from flipping when pushing the bearing ring.

[0044] As Figure 8 and Figure 9 , the support device 24 includes a grinding device 37, a unit housing 38, a clamping device 39, a second gear 40, a connecting rope 41, a winding wheel 42, a third photoelectric sensor 43, a cam 44, a third gear 45 and a control system 46. The control system 46 is fixedly installed at the rear of the interior of the unit housing 38. The grinding device 37 is fixedly installed at the front end of the control system 46 and is symmetrically arranged. The clamping device 39 is arranged at the center of the front end of the control system 46. The third gear 45 is fixedly installed on both sides of the control system 46. The cam 44 is fixedly installed at the side end of the third gear 45 away from the control system 46. The third photoelectric sensor 43 is fixedly installed at the bottom of the side end of the control system 46. The second gear 40 is rotatably installed at the front of both sides of the control system 46. The winding wheel 42 is fixedly installed at the center of the side end of the second gear 40. The connecting rope 41 is fixedly installed on the outer circle of the winding wheel 42. Through the setting of the clamping device 39, the bearing ring can be positioned.

[0045] The vertical rod 5 is rotatably installed at the right bottom of the unit housing 38. The second special-shaped bracket 9 is fixedly installed at the side end of the support base plate 29. The L-shaped bracket 31 is fixedly installed at the top ends on both sides of the control system 46. The feed cavity 13 is fixedly installed at the front end of the control system 46. Both ends of the displacement cross plate 19 are connected to the connecting rope 41. The rack 10 is horizontally aligned with the first gear 4. The front end of the contact rod 8 is arranged in an arc state. The contact rod 8 is horizontally aligned with the rear end of the cam 44. The tooth angle distribution of the third gear 45 is 180°. The top of the rear end of the contact block 18 is inclined at 45°. The contact block 18 is vertically aligned with the chassis 25. Both the first photoelectric inductor 14 and the second photoelectric inductor 17 are in wireless signal connection with the electromagnetic chuck 22.

[0046] The preparation process of a four-point contact super-precision machine ball bearing comprises the following steps:

[0047] S1. Material pretreatment: eliminating internal defects, refining crystal grains, and ultrasonic flaw detection: detecting internal cracks or inclusions in the material;

[0048] S2. Precision turning: using diamond tools or CBN tools to machine structures such as raceways and ribs, with the surface roughness ≤ Ra 0.4μm;

[0049] S3. Heat treatment: immediately cryogenic cooling (-70 to -196°C) after quenching (840 to 860°C oil quenching) the workpiece to reduce retained austenite (≤ 3%), and then tempering at 150 to 180°C for heat preservation to eliminate stress and maintain hardness;

[0050] S4. Super-finishing: operating the oilstone in the four-point contact super-precision machine to oscillate and grind the workpiece, reducing the roughness to Ra 0.01 to 0.05μm;

[0051] S5. Surface treatment: performing DLC process on the workpiece to coat the surface of the workpiece and extend its service life;

[0052] S6. Assembly and detection: assembling in a clean room to avoid dust pollution. At the same time, controlling the pre-tightening force with a torque wrench, and then using a roundness meter to perform the final roundness detection of the raceway.

[0053] The working principle of Embodiment 1 is as follows: When in use, first place the bearing sleeves into the interior of the feeding cavity 13 in sequence. Since the interior of the feeding cavity 13 is provided with placement holes adapted to the bearing sleeves, the bearing sleeves can be placed inside the feeding cavity 13, so that the bearing sleeve at the bottom layer inside the feeding cavity 13 can be aligned with the electromagnetic chuck 22. Subsequently, driving motors are installed at both ends inside the control system 46, and the shafts in the driving motors are connected to the third gear 45. The driving motors can be turned on to drive the third gear 45 to rotate. At this time, since the third gear 45 meshes with the second gear 40, the second gear 40 can be driven to rotate. When the second gear 40 rotates, the winding wheel 42 can be driven to rotate, so that the connecting rope 41 can pull the displacement cross plate 19 to move backward. At this time, since the blocking plate 16 is installed on the displacement cross plate 19, the displacement cross plate 19 can push the bearing sleeve inside the feeding cavity 13 to move backward through the blocking plate 16. Moreover, when the displacement cross plate 19 contacts the second photoelectric inductor 17, the electromagnetic chuck 22 can be powered on, so that the electromagnetic chuck 22 can adsorb the bearing sleeve inside the feeding cavity 13. Thus, when the blocking plate 16 moves, the electromagnetic chuck 22 can carry the bearing sleeve to move. And since an arc groove adapted to the blocking plate 16 is provided at the front end inside the feeding cavity 13, the blocking plate 16 can be allowed to slide inside the feeding cavity 13. Since the size of the electromagnetic chuck 22 is the same as that of the bearing sleeve, when the electromagnetic chuck 22 drives the bearing sleeve to move, the blocking plate 16 can enter the interior of the feeding cavity 13 to prevent the bearing sleeves on the upper layer inside the feeding cavity 13 from falling downward. Moreover, when the displacement cross plate 19 moves, it can also drive the contact block 18 to move to contact the bottom end of the chassis 25. Since a support base is fixedly installed on the grinding device 37 and the bottom end of the chassis 25 contacts the top end of the support base, the chassis 25 can be supported to maintain a horizontal state. Since the top of the rear end of the contact block 18 is inclined at 45°, when the contact block 18 contacts the bottom end of the chassis 25, the chassis 25 can be pushed to move upward. Since the chassis 25 is connected to the extension arm 26 and the extension arm 26 is rotatably installed on the first piston rod 27, when the chassis 25 is pushed, it can rotate upward with the first piston rod 27 as the axis to avoid interference between the electromagnetic chuck 22 driving the bearing sleeve and the push rod 35. Subsequently, when the displacement cross plate 19 moves backward to the limit position, the electromagnetic chuck 22 can drive the bearing sleeve to move onto the clamping device 39. Moreover, the blocking plate 16 can also drive the contact disk 15 to contact the first photoelectric inductor 14, so that the electromagnetic chuck 22 can be powered off to release the bearing sleeve and place it on the clamping device 39. At the same time, the third gear 45 can rotate 180°, so that the third gear 45 can disengage from the second gear 40. The displacement cross plate 19 loses the pulling force, and the elasticity of the first spring 20 will drive the displacement cross plate 19 to move forward to reset, causing the displacement cross plate 19 to contact the second photoelectric inductor 17. And the rear end of the electromagnetic chuck 22 can be flush with the inner wall of the placement hole inside the feeding cavity 13.Thus, the bearing sleeve on the upper layer inside the feeding cavity 13 drops downward to align with the electromagnetic chuck 22, completing the work of replenishing the bearing sleeve. Meanwhile, the contact block 18 can be moved out from the bottom end of the chassis 25, enabling the extension arm 26 and the push rod 35 to rotate downward to a horizontal state. Subsequently, after the third gear 45 rotates 180°, the cam 44 can contact the third photoelectric inductor 43. Since the third photoelectric inductor 43 is electrically connected to the control system 46, the control system 46 can operate the grinding device 37 and the clamping device 39. Thus, the clamping device 39 can clamp and rotate the bearing sleeve, and the four grinding devices 37 can synchronously move to contact the surface of the bearing sleeve for ultra-precision grinding of the bearing sleeve. When the cam 44 passes through the inside of the third photoelectric inductor 43, the grinding device 37 and the clamping device 39 can be in an operating state. When the cam 44 rotates out from the inside of the third photoelectric inductor 43, the control system 46 can drive the grinding device 37 and the clamping device 39 to reset, thereby releasing the bearing sleeve. Subsequently, when the third gear 45 continuously drives the cam 44 to rotate, the convex part of the cam 44 can rotate to contact the front end of the contact rod 8, causing the cam 44 to squeeze the contact rod 8 to drive the second special-shaped bracket 9 and the rack 10 to displace backward. Since the support base plate 29 is connected to the second special-shaped bracket 9, the support base plate 29 can displace synchronously. When the support base plate 29 displaces backward, it can drive the push rod 35 to contact the bearing sleeve on the clamping device 39. With the third spring 34 arranged between the push rod 35 and the extension arm 26, and the blocking frame 36 rotatably installed at the top end of the extension arm 26, when the push rod 35 contacts the bearing sleeve, the push rod 35 can rotate forward until the push rod 35 completely passes the bearing sleeve. Due to the elasticity of the third spring 34, it will pull the push rod 35 to move back to its original position. And since the anti-drop piece is fixedly installed at the rear end of the blocking frame 36, when the push rod 35 resets, it can contact the surface of the anti-drop piece, so that the push rod 35 can be horizontally aligned with the extension arm 26. When the push rod 35 passes the bearing sleeve, the support base plate 29 can continue to displace, so that the second piston rod 33 can contact the front end of the control system 46, enabling the second piston rod 33 to enter the inside of the air cylinder 28, and the first piston rod 27 displaces forward. When the first piston rod 27 displaces forward, it can drive the extension arm 26 and the push rod 35 to displace forward. Limited by the anti-drop piece at the rear end of the blocking frame 36, it can prevent the push rod 35 from rotating backward. Thus, when the extension arm 26 displaces, it can drive the push rod 35 to squeeze the bearing sleeve to move forward along the surface of the clamping device 39, so that the bearing sleeve can fall off from the clamping device 39. At the same time, while the support base plate 29 displaces, it can also drive the rack 10 to displace along the surface of the first gear 4, thereby driving the vertical rod 5 and the receiving cavity 6 to rotate. When the push rod 35 has not yet displaced forward to the limit position, the receiving cavity 6 can rotate to the bottom end of the clamping device 39. Thus, when the push rod 35 pushes the bearing sleeve out from the clamping device 39, the bearing sleeve can fall into the inside of the receiving cavity 6 for collection. And,The material of the receiving cavity 6 is plastic, which can avoid the phenomenon of the bearing sleeve being knocked. Subsequently, when the bearing sleeve is discharged, the convex part of the cam 44 can rotate to disengage from the contact rod 8. At this time, the elasticity of the second spring 30 will drive the support bottom plate 29 to move back to its original position to complete the work.

[0054] Embodiment 2

[0055] On the basis of Embodiment 1, as Figure 10 shown, the feeding cavity 13 further includes a support top frame 47, a feeding disk 48 and a hydraulic cylinder 49. The support top frame 47 is fixedly installed at the top end of the feeding cavity 13, the hydraulic cylinder 49 is fixedly installed at the front end of the support top frame 47, and the feeding disk 48 is fixedly installed at the rear end of the hydraulic cylinder 49.

[0056] When implementing this embodiment, when the bearing sleeve needs to be replenished inside the feeding cavity 13, the bearing sleeve can be placed inside the support top frame 47 so that the bearing sleeve can be vertically placed inside the support top frame 47. Subsequently, the hydraulic cylinder 49 can be activated to drive the feeding disk 48 to slide into the support top frame 47, thereby squeezing the bearing sleeve to slide inside the support top frame 47 in the direction of the feeding cavity 13. Since the support top frame 47 is provided with a feeding hole near the bottom end of the feeding cavity 13, when the bearing sleeve moves to be vertically aligned with the feeding hole, the bearing sleeve will fall into the feeding cavity 13 to complete the replenishment work of the bearing sleeve.

[0057] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. Four-point contact ultra-precision machine ball bearing manufacturing equipment, including a positioning mechanism (3). A receiving device (1) is rotatably installed at the inner bottom end of the positioning mechanism (3), and a transmission device (2) is fixedly installed on the right side inside the positioning mechanism (3). It is characterized in that: The positioning mechanism (3) includes a feeding device (11) and a driving component (12). The feeding device (11) is fixedly installed inside the driving component (12). The feeding device (11) includes a feeding cavity (13), a first photoelectric inductor (14), a contact disc (15), a sealing plate (16), a second photoelectric inductor (17), a contact block (18), a displacement cross plate (19), a first spring (20), an extension rod (21), and an electromagnetic chuck (22). The extension rods (21) are symmetrically and fixedly installed at the bottom of the front end of the feeding cavity (13). The second photoelectric inductor (17) is fixedly installed at one end of the extension rod (21) away from the feeding cavity (13). The displacement cross plate (19) is slidably sleeved on the extension rod (21). The first springs (20) are symmetrically and fixedly installed between the displacement cross plate (19) and the feeding cavity (13). The contact blocks (18) are fixedly installed at the top of both ends of the displacement cross plate (19). The sealing plate (16) is fixedly installed at the center of the top end of the displacement cross plate (19). The contact disc (15) is fixedly installed at the top of the front end of the sealing plate (16). The first photoelectric inductor (14) is fixedly installed at the front end of the feeding cavity (13), and the first photoelectric inductor (14) is located above the sealing plate (16). The electromagnetic chuck (22) is fixedly installed at the rear end of the sealing plate (16).

2. The four-point contact ultra-precision machine ball bearing manufacturing equipment according to claim 1, characterized in that: The receiving device (1) includes a first gear (4), a vertical rod (5), and a receiving cavity (6). The receiving cavity (6) is fixedly installed on the outer circle of the vertical rod (5). The first gear (4) is fixedly installed at the top end of the vertical rod (5). The transmission device (2) includes a first special-shaped bracket (7), a contact rod (8), a second special-shaped bracket (9), and a rack (10). The rack (10) is fixedly installed at the bottom end of the second special-shaped bracket (9). The second special-shaped bracket (9) is fixedly installed at the front end of the first special-shaped bracket (7). The contact rod (8) is fixedly installed at the bottom end of the first special-shaped bracket (7) away from the second special-shaped bracket (9).

3. The four-point contact ultra-precision machine ball bearing manufacturing equipment according to claim 2, characterized in that: The driving component (12) includes an alignment device (23) and a support device (24). The alignment devices (23) are symmetrically and fixedly installed inside the support device (24).

4. The four-point contact ultra-precision machine ball bearing manufacturing equipment according to claim 3, characterized in that: The alignment device (23) includes a base frame (25), an extension arm (26), a first piston rod (27), an air cylinder (28), a support base plate (29), a second spring (30), an L-shaped bracket (31), a hexagonal rod (32), a second piston rod (33), a third spring (34), a push rod (35) and a blocking frame (36), wherein the hexagonal rod (32) is fixedly mounted on the front end of the L-shaped bracket (31), the support base plate (29) is slidably sleeved on the outer ring of the hexagonal rod (32), the second spring (30) is fixedly mounted between the support base plate (29) and the L-shaped bracket (31), and the air cylinder (28) is fixedly mounted. At the bottom end of the supporting base plate (29), the second piston rod (33) is slidably inserted into the rear end of the air cylinder (28), the first piston rod (27) is slidably inserted into the front end of the air cylinder (28), the extension arm (26) is rotatably mounted on the front end of the first piston rod (27), the blocking frame (36) is rotatably mounted on the top side end of the extension arm (26), the pushing rod (35) is fixedly mounted on the bottom end of the blocking frame (36) away from the extension arm (26), the third spring (34) is fixedly mounted between the extension arm (26) and the pushing rod (35), and the base frame (25) is fixedly mounted on the bottom end of the extension arm (26).

5. The preparation equipment for the four-point contact ultra-precision machine ball bearing according to claim 4, characterized in that: The supporting device (24) includes a grinding device (37), a machine housing (38), a clamping device (39), a second gear (40), a connecting rope (41), a reel (42), a third photoelectric sensor (43), a cam (44), a third gear (45) and a control system (46). The control system (46) is fixedly mounted at the rear of the machine housing (38). The grinding device (37) is fixedly mounted at the front end of the control system (46). The grinding device (37) is symmetrically arranged. The clamping device (39) is arranged at the control The front end center of the control system (46), the third gear (45) is fixedly mounted on both sides of the control system (46), the cam (44) is fixedly mounted on the side end of the third gear (45) away from the control system (46), the third photoelectric sensor (43) is fixedly mounted on the bottom of the side end of the control system (46), the second gear (40) is rotatably mounted in front of both sides of the control system (46), the winding wheel (42) is fixedly mounted on the side end center of the second gear (40), and the connecting rope (41) is fixedly mounted on the outer ring of the winding wheel (42).

6. The preparation equipment for four-point contact super-precision machine ball bearings according to claim 5, characterized in that: The vertical rod (5) is rotatably mounted on the right side of the bottom of the unit housing (38), the second special-shaped bracket (9) is fixedly mounted on the side end of the supporting base plate (29), the L-shaped bracket (31) is fixedly mounted on the top ends of both sides of the control system (46), the feed cavity (13) is fixedly mounted on the front end of the control system (46), and the two ends of the displacement horizontal plate (19) are connected to the connecting rope (41).

7. The preparation equipment for the four-point contact super-precision machine ball bearing according to claim 6, characterized in that: The rack (10) is horizontally aligned with the first gear (4), the front end of the contact rod (8) is arranged in an arc state, the contact rod (8) is horizontally aligned with the rear end of the cam (44), and the tooth distribution angle of the third gear (45) is 180°.

8. The four-point contact ultra-precision machine ball bearing manufacturing equipment according to claim 7, characterized in that: The top of the rear end of the contact block (18) is inclined at 45°, the contact block (18) is vertically aligned with the chassis (25), and both the first photoelectric sensor (14) and the second photoelectric sensor (17) are wirelessly connected to the electromagnetic chuck (22).

9. The four-point contact superfinishing ball bearing production equipment according to claim 8, characterized in that: The feed cavity (13) further includes a support top frame (47), a feed disk (48) and a hydraulic cylinder (49). The support top frame (47) is fixedly installed at the top end of the feed cavity (13), the hydraulic cylinder (49) is fixedly installed at the front end of the support top frame (47), and the feed disk (48) is fixedly installed at the rear end of the hydraulic cylinder (49).

10. A process for preparing four-point contact superfinished ball bearings, using the four-point contact superfinished ball bearing preparation equipment according to claim 9, characterized in that: It includes the following steps: S1. Material pretreatment: Eliminate internal defects, refine grains, and perform ultrasonic flaw detection: Detect internal cracks or inclusions in the material; S2. Precision turning: Use diamond tools or CBN tools to machine structures such as grooves and ribs, with a surface roughness ≤ Ra0.4μm; S3. Heat treatment: Quench the workpiece (oil quench at 840 - 860°C) and then immediately perform cryogenic treatment (-70 - -196°C) to reduce retained austenite (≤ 3%), and then perform low-temperature tempering at 150 - 180°C for heat preservation to eliminate stress and maintain hardness; S4. Superfinishing: Oscillate and grind the workpiece with the oilstone in a four-point contact superfinishing machine to reduce the roughness to Ra 0.01 - 0.05μm; S5. Surface treatment: Perform DLC process on the workpiece to coat the surface of the workpiece and extend its life; S6. Assembly and inspection: Assemble in a clean room to avoid dust pollution. At the same time, control the pre-tightening force with a torque wrench. Subsequently, use a roundness instrument to perform the final roundness inspection of the raceway.

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