Turning equipment for precise bearing assembly

Abstract

The invention relates to the technical field of turning equipment, and discloses turning equipment for a precision bearing assembly, which comprises two symmetrically arranged chucks, a rotation driving assembly for driving the chucks to rotate, a driving base for driving the chucks to translate, and a cutting mechanism for cutting a workpiece, a plurality of first sliding grooves are formed in the chuck in the radial direction, the first sliding grooves are formed in the chuck in a penetrating mode, first sliding bases are slidably installed in the first sliding grooves, and sliding type fixing rods are arranged in the first sliding bases in a penetrating mode; through the arrangement of composite positioning of the axial adjustable sliding type fixing rod and the two-way double chucks, adaptive clamping of long cylindrical blanks with different axial lengths is achieved, and the fixing mode that inner hole multi-point supporting and end face pressing are combined is adopted; the problems of blank local deformation, rotation eccentricity and low coaxiality caused by a traditional clamping mode are effectively solved.

Description

Technical Field

[0001] This invention relates to the field of turning equipment technology, specifically a turning equipment for precision bearing assemblies. Background Technology

[0002] Bearings are core components in mechanical equipment used to support rotation and reduce friction. Bearing rings are a key part of these components, and their machining accuracy directly affects the bearing's operational stability, service life, and load-bearing capacity. In the production process of precision bearing rings, turning is the core process for forming the inner and outer circles of the rings. Traditional machining methods often adopt a single-station, single-side cutting mode, first turning the outer circumference of the ring, and then changing the clamping method or tool to machine the inner hole. The process connection is complex and the machining cycle is long.

[0003] Chinese patent CN119703150A discloses a production equipment for precision bearing rings or bearings. The equipment uses two sets of symmetrically arranged rotating and stationary mechanisms to perform internal support positioning of the bearing ring blank. It uses a planar thread and worm gear structure to drive the radial extension and retraction of the positioning seat to achieve clamping. With the help of independent internal and external cutting mechanisms, it can realize the synchronous turning of the inner and outer walls of the blank to improve the processing efficiency.

[0004] Although the above solution can achieve synchronous internal and external cutting, its positioning structure can only be adjusted radially. For some bearing components with long axial lengths, the blanks have long axial lengths and are fixed only by positioning structures with short axial lengths. During clamping, stress concentration is likely to occur. Especially for some blanks with thin walls, due to the small clamping and fixing area, the blanks are prone to deformation and displacement during rotation and cutting, making it difficult to meet the requirements of high precision and high consistency precision bearing ring processing.

[0005] Therefore, it is necessary to provide a turning device for precision bearing assemblies to solve the above-mentioned technical problems. Summary of the Invention

[0006] The purpose of this invention is to provide a turning device for precision bearing assemblies. By using an axially adjustable sliding fixing rod and a bidirectional double chuck for composite positioning, it achieves the adaptive clamping of long cylindrical blanks with different axial lengths. The fixing method, which combines multi-point support in the inner hole and end face pressing, effectively avoids the problems of local deformation, rotational eccentricity and low coaxiality of the blank caused by traditional clamping methods.

[0007] The above-mentioned technical objective of the present invention is achieved through the following technical solution: a turning device for precision bearing assemblies, comprising two symmetrically arranged chucks, a rotary drive assembly for driving the chucks to rotate, a drive base for driving the chucks to translate, and a cutting mechanism for cutting the workpiece. The chucks are provided with a plurality of radially arranged sliding grooves, and the sliding grooves are provided through the chucks. A slide block is slidably installed in the sliding groove, and a sliding fixed rod is provided through the slide block. An adjustment assembly for driving the sliding fixed rod to move along the axial direction of the chuck is provided on one side of the chuck.

[0008] A further configuration of the present invention is as follows: the adjustment assembly includes an adjustment disk and a plurality of slide blocks II. The adjustment disk is coaxially arranged with the chuck. A plurality of slide grooves II are radially opened on the adjustment disk, and the slide grooves II are disposed through the adjustment disk. The plurality of slide blocks II are slidably disposed in the plurality of slide grooves II respectively. The ends of the plurality of sliding fixing rods are fixedly connected to the plurality of slide blocks II respectively.

[0009] A further configuration of the present invention is as follows: a first upright plate and a second upright plate are fixedly installed on the upper surface of the drive base, a drive seat is slidably arranged between the first upright plate and the second upright plate, a support ring is fixedly installed on the upper surface of the drive seat, and the adjustment disc is rotatably installed inside the support ring.

[0010] A further configuration of the present invention is as follows: a guide post 2 is fixedly installed between the first upright plate and the second upright plate, the guide post 2 is slidably engaged with the drive seat, a drive screw is rotatably installed between the first upright plate and the second upright plate, the drive screw passes through the drive seat and is threadedly connected to the drive seat, a motor 1 is fixedly installed on the second upright plate, and the output end of the motor 1 is fixedly connected to the end of the drive screw.

[0011] A further feature of the present invention is that: a through groove is provided inside the slide block one, and a mounting seat is slidably disposed in the through groove; two elastic pads are symmetrically arranged inside the through groove along the radial direction of the chuck; the mounting seat is limited between the two elastic pads; both elastic pads apply pressure to the mounting seat; and a locking component for locking the slide block two is provided on the side of the adjusting plate away from the chuck.

[0012] A further configuration of the present invention is as follows: the locking assembly includes a second support ring, a locking ring rotatably mounted inside the second support ring, a plurality of limiting rails fixedly mounted inside the locking ring, and a plurality of slide blocks 3 slidably mounted on the limiting rails. The slide blocks 3 are fixedly connected to the second slide block via a connecting rod. The side wall of the second slide block away from the first slide block is provided with an anti-slip surface. The drive seat is provided with a third slide groove, and a fourth slide block is slidably mounted in the third slide groove. The second support ring is fixedly connected to the fourth slide block. A first hydraulic cylinder is fixedly mounted on the side wall of the drive seat. The output end of the first hydraulic cylinder extends into the third slide groove, and a push block is fixedly mounted on the output end of the first hydraulic cylinder.

[0013] A further configuration of the present invention is as follows: a support ring three is fixedly installed on the upright plate one; the chuck is rotatably disposed within the support ring three; the rotary drive assembly includes a gear one, a gear two, a mounting bracket, a drive shaft, and a motor two; the gear one is fixedly connected to the chuck and is coaxially arranged with the chuck; the mounting bracket is fixedly installed on the drive base; the gear two is rotatably connected to the top of the mounting bracket and meshes with the gear one; the output end of the motor two is fixedly connected to the end of the drive shaft; the drive shaft passes through the two gear twos and the gear twos are slidably engaged with the drive shaft.

[0014] A further configuration of the present invention is that the cutting mechanism includes an inner cutting component and an outer cutting component, wherein the inner cutting component is used to cut the inner peripheral wall of the blank, and the outer cutting component is used to cut the outer peripheral wall of the blank.

[0015] A further configuration of the present invention is as follows: the internal cutting assembly includes a second hydraulic cylinder, a support arm, an internal tool holder fixedly installed at one end of the support arm, a first lifting seat fixedly installed at the other end of the support arm, and an internal cutting tool fixedly installed on the internal tool holder. The output end of the second hydraulic cylinder is fixedly connected to the first lifting seat, and the second hydraulic cylinder is fixedly connected to the frame of the turning equipment. The chuck and the adjusting plate are both provided with through holes in the middle for the support arm to pass through.

[0016] A further configuration of the present invention is as follows: the external cutting assembly includes a hydraulic cylinder three, a lifting seat two fixedly connected to the output end of the hydraulic cylinder three, an external tool holder fixedly installed at the bottom of the lifting seat two, and an external cutting tool fixedly installed on the external tool holder; the hydraulic cylinder three is fixedly connected to the frame of the turning equipment.

[0017] In summary, the present invention has the following beneficial effects: The present invention achieves adaptive clamping of long cylindrical blanks with different axial lengths by using an axially adjustable sliding fixing rod and a bidirectional double chuck for composite positioning. The fixing method, which combines multi-point support in the inner hole with end face clamping, effectively avoids the problems of local deformation, rotational eccentricity, and low coaxiality of the blank caused by traditional clamping methods. At the same time, the reserved cutting clearance prevents interference between the tool and the sliding fixing rod. With the chuck and the sliding fixing rod moving in opposite directions at the same speed, continuous switching of the cutting position is achieved, which significantly improves the continuity of processing and the coaxiality accuracy.

[0018] This invention achieves continuous support and stable positioning of the blank during the axial adjustment of the sliding fixed rod by setting up a floating mounting seat with a built-in elastic pad and a rigid locking component in the slide. There is no need to release the radial fixation and end face clamping during adjustment, which completely eliminates the risk of axial movement and radial offset of the blank. With the structural design that the radial adjustment and axial adjustment do not interfere with each other, the clamping and adjustment flexibility and accuracy are greatly improved, effectively improving the chatter and deformation defects in the processing of thin-walled blanks, and significantly improving the processing quality and product qualification rate of precision bearing components. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the main structure of the present invention; Figure 3 This is a schematic diagram of the cutting mechanism, drive base, and chuck of the present invention; Figure 4 This is a schematic diagram of the structure of the chuck, adjusting component, and locking component of the present invention; Figure 5 This is a schematic diagram showing the disassembled structure of the chuck, adjustment component, and locking component of the present invention; Figure 6 This is a schematic diagram of the locking component and sliding fixing rod of the present invention; Figure 7 for Figure 6 A magnified structural diagram at point A; Figure 8 This is a schematic diagram of the slide block, adjusting screw, and mounting base of the present invention; Figure 9 This is a schematic diagram of the structure of the drive base, support ring one, support ring two, and support ring three of the present invention.

[0020] In the diagram: 1. Chuck; 101. Slide 1; 2. Slide 1; 3. Mounting base; 4. Elastic washer; 5. Adjusting screw; 6. Sliding fixing rod; 7. Adjusting disc; 701. Slide 2; 8. Slide 2; 801. Anti-slip surface; 9. Locking ring; 10. Limit rail; 11. Slide 3; 12. Connecting rod; 13. Reinforcing ring; 14. Guide post 1; 15. Support ring 1; 16. Support ring 2; 17. Drive base; 18. Drive seat; 19. Vertical plate 1; 20. Vertical plate 2; 21. Drive 21. Moving screw; 22. Motor 1; 23. Guide post 2; 24. Slide 4; 25. Hydraulic cylinder 1; 2501. Push block; 26. Support ring 3; 27. Gear 1; 28. Mounting bracket; 29. ​​Gear 2; 30. Drive shaft; 31. Fixed bracket; 32. Motor 2; 33. Support arm; 34. Inner tool holder; 35. Inner cutting tool; 36. Lifting seat 1; 37. Hydraulic cylinder 2; 38. Outer tool holder; 39. Outer cutting tool; 40. Lifting seat 2; 41. Hydraulic cylinder 3; 42. Translation drive mechanism. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings in the embodiments of the present invention.

[0022] Please see Figures 1-6In this embodiment of the invention, a turning device for a precision bearing assembly includes two symmetrically arranged chucks 1, a rotary drive assembly for driving the chucks 1 to rotate, a drive base 17 for driving the chucks 1 to translate, and a cutting mechanism for cutting the workpiece. The chucks 1 have a plurality of radially arranged grooves 101, which are arranged in a circular array around the axis of the chucks 1. The grooves 101 penetrate the chucks 1, and a slide block 2 is slidably mounted within each groove 101. A sliding fixing rod 6 penetrates the slide block 2. A [missing information - likely a component or element] is provided on one side of the chucks 1. An adjustment assembly for driving the sliding fixed rod 6 to move along the axis of the chuck 1; the blank to be processed is cylindrical. For longer cylindrical blanks, two chucks 1 are used to simultaneously fix the blank in both directions. When fixing, the sum of the lengths of the two symmetrically arranged sliding fixed rods 6 extending from the slide block 2 should be less than the overall length of the blank. Through this dimensional fit, it is ensured that when the cutting mechanism performs cutting operations on the inner circumferential wall of the blank, the inner cutting tool 35 can be accurately located in the reserved cutting gap between the two symmetrically arranged sliding fixed rods 6, avoiding interference and collision between the cutting tool and the sliding fixed rod 6. During processing, the sliding fixing rod 6 is first driven to slide axially along the chuck 1 by adjusting the component. The extension length of the sliding fixing rod 6 from the slide block 2 is precisely adjusted to match the axial dimensions of the blank to be processed. The blank for processing the bearing assembly is then placed on one set of sliding fixing rods 6. Then, the chuck 1 is driven to move axially by the drive base 17, so that the two symmetrically arranged sets of sliding fixing rods 6 smoothly extend into the inner cavity of the blank, and the side wall of the slide block 2 is tightly pressed against the two end walls of the blank, achieving preliminary axial positioning and pre-fixation of the blank. Then, the position of the slide block 2 along the radial direction of the chuck 1 is adjusted by the matching adjustment structure of the chuck 1, so that the sliding fixing rod 6 is completely fitted and pressed against the inner peripheral wall of the blank, forming a multi-point radial support fixing structure, completing the stable locking of the blank. During cutting, the rotating drive component is used synchronously. Two chucks 1 are driven to rotate coaxially, thereby causing the blank to rotate at a uniform and stable speed. The inner cutting tool 35 is always located in the reserved gap between the two sliding fixed rods 6. Through the radial feed of the inner cutting tool 35 and the rotation of the blank, the precision turning of the inner circumferential wall of the blank is achieved. When adjusting the cutting position, the two chucks 1 are driven to translate synchronously through the two drive bases 17. At the same time, the two sets of sliding fixed rods 6 are driven to move synchronously through the adjustment component. The movement direction of the chucks 1 and the movement direction of the sliding fixed rods 6 are strictly controlled to be opposite and the linear speed is kept consistent. This allows the reserved cutting gap position between the two symmetrically set sliding fixed rods 6 to be oriented and finely adjusted along the blank axis. At the same time, it ensures that the inner cutting tool 35 is always inside the gap. The precise switching of the cutting position can be completed without adjusting the tool position, ensuring the continuity and coaxiality accuracy of the cutting process.

[0023] This solution utilizes a sliding fixing rod 6 structure that can slide axially along the chuck 1, allowing for flexible adjustment of the length of the sliding fixing rod 6 extending from the chuck 1. This adapts to the clamping and fixing requirements of long cylindrical blanks with different axial lengths. Compared to the peripheral clamping method of traditional three-jaw or four-jaw clamps, this solution employs a composite fixing method of multi-point support in the inner hole and end face pressing. This results in more uniform fixing force and a larger contact area, effectively avoiding problems such as local deformation and rotational eccentricity caused by concentrated clamping force in traditional clamps. It significantly improves the coaxiality and stability of the blank during rotation, thereby significantly improving the turning accuracy of the bearing assembly. Especially for the machining of thin-walled cylindrical precision bearing assemblies, it can effectively avoid chatter and deformation defects during the machining of thin-walled blanks, ensuring product processing quality and pass rate.

[0024] In this embodiment, preferably, the adjustment assembly includes an adjustment disk 7 and multiple sliding blocks 8. The adjustment disk 7 is coaxially arranged with the chuck 1. Multiple sliding grooves 701 are radially formed on the adjustment disk 7. The multiple sliding grooves 701 are arranged in a circular array with the axis of the adjustment disk 7 as the array center, and the sliding grooves 701 are disposed through the adjustment disk 7. The multiple sliding blocks 8 are slidably disposed in the multiple sliding grooves 701. The ends of the multiple sliding fixing rods 6 are fixedly connected to the multiple sliding blocks 8. The opposite sliding grooves 101 and sliding grooves 701 are arranged in the same direction. This allows slide block 12 and slide block 28 to slide synchronously; multiple guide posts 14 are fixedly installed on the side wall of the chuck 1, all of which penetrate the adjusting disk 7, and the guide posts 14 slide in cooperation with the adjusting disk 7 to limit the sliding of the adjusting disk 7; a vertical plate 19 and a vertical plate 20 are fixedly installed on the upper surface of the drive base 17, and a drive seat 18 is slidably arranged between the vertical plate 19 and the vertical plate 20, and a support ring 15 is fixedly installed on the upper surface of the drive seat 18, and the adjusting disk 7 is rotatably installed in the support ring 15; the vertical plate 19 and the vertical plate 20 slide block 20... A guide post 23 is fixedly installed between plates 20, and the guide post 23 is slidably engaged with the drive seat 18. A drive screw 21 is rotatably installed between the vertical plate 19 and the vertical plate 20, and the drive screw 21 passes through the drive seat 18 and is threadedly connected to the drive seat 18. A motor 22 is fixedly installed on the vertical plate 20, and the output end of the motor 22 is fixedly connected to the end of the drive screw 21. The motor 22 can drive the drive screw 21 to rotate, thereby driving the drive seat 18 to move horizontally along the guide post 23. When the drive seat 18 moves horizontally, it passes through the support ring 1. 15 synchronously drives the adjusting plate 7 to move smoothly along the axial direction of the chuck 1. During the movement of the adjusting plate 7, through the fixed connection between the slide block 2 8 and the sliding fixed rod 6, the sliding fixed rod 6 is driven to move synchronously along the axial direction, thereby realizing the precise adjustment of the extension length of the sliding fixed rod 6. In addition, the sliding adaptation design of the slide block 2 8 and the slide groove 2 701 can fully adapt to the adjustment action of the slide block 1 2 driving the sliding fixed rod 6 along the radial direction of the chuck 1. The radial adjustment and the axial adjustment do not interfere with each other, ensuring the independent operation and coordinated cooperation of the two adjustment mechanisms, and improving the flexibility and accuracy of clamping and adjustment.

[0025] In this embodiment, preferably, a support ring 26 is fixedly installed on the upright plate 19, and the chuck 1 is rotatably disposed within the support ring 26. The rotary drive assembly includes a gear 27, a gear 29, a mounting bracket 28, a drive shaft 30, and a motor 32. The gear 27 is fixedly connected to the chuck 1 and is coaxial with the chuck 1. The mounting bracket 28 is fixedly installed on the drive base 17, and the gear 29 is rotatably connected to the top of the mounting bracket 28. The gear 29 is also rotatably connected to the gear 27. 27 meshing, motor 22 is fixedly mounted on the frame of the turning equipment via bracket 31, drive shaft 30 is rotatably connected to the frame of the turning equipment, output end of motor 22 is fixedly connected to end of drive shaft 30, drive shaft 30 passes through two gears 29, and gears 29 slide in engagement with drive shaft 30, limit protrusions are provided on drive shaft 30 so that when drive shaft 30 rotates, it can drive gears 29 to rotate synchronously without affecting the movement of gears 29 following drive base 17 on drive shaft. The drive shaft 30 slides synchronously on the upper part; the support ring 26 provides stable radial support for the chuck 1, while ensuring that the chuck 1 can rotate freely around its own axis. When the drive base 17 moves axially, the vertical plate 19 and the support ring 26 can drive the chuck 1 to move synchronously axially without affecting the continuity of the rotation. When the motor 2 32 starts working, the output end of the motor 2 32 outputs a stable torque, which drives the drive shaft 30 to rotate at a constant speed. The drive shaft 30, through the transmission cooperation of the limit protrusion and the gear 2 29, synchronously drives the two gears 2 29 to rotate coaxially. The gears 2 29, through gear meshing transmission, drive the two gears 1 27 and the chuck 1 fixed to them to rotate synchronously in the same direction, ensuring that the rotation speed and phase of the two chucks 1 are completely consistent, thereby driving the blank to rotate smoothly coaxially, and achieving high-precision cutting with the cutting mechanism. The sliding cooperation structure between the drive shaft 30 and the gear 2 29, combined with the gear meshing transmission method, not only realizes the synchronous rotation drive of the two chucks 1 and ensures the coaxiality of the rotation, but also does not interfere with the axial translation adjustment of the chuck 1.

[0026] In this embodiment, preferably, the cutting mechanism includes an internal cutting component and an external cutting component. The internal cutting component is used to cut the inner peripheral wall of the blank, and the external cutting component is used to cut the outer peripheral wall of the blank. The internal cutting component includes a second hydraulic cylinder 37, a support arm 33, an inner tool holder 34 fixedly installed at one end of the support arm 33, a first lifting seat 36 fixedly installed at the other end of the support arm 33, and an internal cutting tool 35 fixedly installed on the inner tool holder 34. The output end of the second hydraulic cylinder 37 is fixedly connected to the first lifting seat 36, and the second hydraulic cylinder 37 is fixedly connected to the frame of the turning equipment. The chuck 1 and the adjusting plate 7 both have through holes in the middle for the support arm 33 to pass through. The external cutting component includes a third hydraulic cylinder 41, a second lifting seat 40 fixedly connected to the output end of the third hydraulic cylinder 41, and a tool fixedly installed on the second lifting seat 40. The outer tool holder 38 at the bottom and the outer cutting tool 39 fixedly mounted on the outer tool holder 38 are connected to the frame of the turning equipment by hydraulic cylinder 31. Through the through-type support arm 33 structure design, the inner cutting tool 35 can smoothly pass through the central through hole of the adjusting plate 7 and the chuck 1, and extend into the inner cavity of the blank to the designated cutting position. Through the extension and retraction of the output end of hydraulic cylinder 2 37, the radial feed and lifting height of the inner cutting tool 35 are precisely controlled. With the uniform rotation of the blank, the precision turning of the inner peripheral wall of the blank is achieved. Through the extension and retraction of the output end of hydraulic cylinder 3 41, the radial feed and lifting of the outer cutting tool 39 are synchronously controlled. With the rotation of the blank, the precision turning of the outer peripheral wall is completed. The inner and outer cutting components are independently controlled, which can realize the step-by-step or synchronous processing of the inner hole and the outer circle, improving the processing compatibility and operation efficiency of the equipment.

[0027] In this embodiment, preferably, both the internal cutting assembly and the external cutting assembly are provided in two sets. When processing conventional short-sized bearing assemblies, two blanks can be independently clamped by two chucks 1 to achieve synchronous clamping at two workstations. At this time, the sliding fixing rod 6 only extends a short distance from the chuck 1 to meet the inner hole support requirements of the short blanks. By using the two sets of internal cutting assemblies and external cutting assemblies to simultaneously cut the two blanks, a single machine can perform parallel operation at two workstations, which greatly improves the batch processing efficiency of conventional bearing assemblies and meets the dual requirements of precision machining of long blanks and efficient batch processing of short blanks.

[0028] In this embodiment, preferably, a translational drive mechanism 42 is provided below each of the two drive bases 17. The translational drive mechanism 42 is used to drive the drive base 17 to move horizontally. The movement directions of the two drive bases 17 are on the same straight line. The translational drive mechanism 42 is existing technology and can be driven by a screw and slider structure. The specific principle will not be described in detail here.

[0029] It should be noted that this equipment is also equipped with an intelligent control module. The intelligent control module is electrically connected to the various drive components such as motors, hydraulic cylinders, and air cylinders in the rotary drive assembly, adjustment assembly, translation drive mechanism 42, locking assembly, and cutting mechanism. It can coordinate and precisely control the start / stop, speed, displacement, feed amount, and action sequence of each drive component according to a preset program. It automatically completes the entire process of axial adjustment of the sliding fixed rod 6, synchronous translation and rotation of the chuck 1, continuous switching of the cutting station, and tightness control of the locking assembly. This ensures precise connection and stable operation of clamping, positioning, cutting, and adjustment processes, further improving the automation level and processing control accuracy of the equipment.

[0030] During the research, it was found that since the blank is compositely fixed by the radial support of multiple sliding fixing rods 6 and the end face extrusion of the slide block 2, when adjusting the extension length of the sliding fixing rods 6 from the chuck 1, it is often necessary to simultaneously release the radial fixation of the slide block 2 and the axial limit of the sliding fixing rods 6 in order to complete the position adjustment. During this process, the blank loses effective support and constraint, and is very prone to axial movement, radial eccentricity and other offset problems, which affect the processing accuracy and may even lead to the scrapping of the blank. In order to solve this technical defect, the following embodiment is set up.

[0031] Please see Figures 4-9In this embodiment of the invention, the slide block 2 has a through groove inside, and a mounting seat 3 is slidably disposed in the through groove. The mounting seat 3 can move within a small range along the setting direction of the slide block 101. Two elastic pads 4 are symmetrically arranged radially along the inside of the through groove and the mounting seat 3 is limited between the two elastic pads 4. Both elastic pads 4 apply pressure to the mounting seat 3. A locking component for locking the slide block 2 8 is provided on the side of the adjusting plate 7 away from the chuck 1. The elastic pads 4 are made of elastic metal or elastic rubber. When fixing the blank, the slide block 2 drives the sliding fixing rod 6 to move radially, so that the elastic pad 4 near the blank is in a slightly elastically compressed state. The multiple sliding fixing rods 6 distributed in a ring array are all tightly attached to the inner peripheral wall of the blank, forming a uniform radial support force. Before the chuck 1 drives the blank to rotate and cut, the sliding block 2 8 is rigidly locked by the locking component, thereby realizing the axial and radial bidirectional locking of the sliding fixing rod 6, preventing the sliding fixing rod 6 from radially moving or axially moving during the high-speed rotation of the blank. To address the issue of slippage and ensure the robustness and stability of the fixed structure, when adjusting the axial extension length of the sliding fixing rod 6, the blank is first stopped rotating and kept stationary. At this time, the rigid lock on the slide block 2 8 is released through the locking assembly, allowing the sliding fixing rod 6 to slide slightly radially along the chuck 1 within the limiting range of the two elastic pads 4 via the mounting base 3. This significantly reduces the frictional resistance of the sliding fixing rod 6 moving axially along the chuck 1, facilitating precise adjustment of the length of the sliding fixing rod 6 extending out of the chuck 1. Simultaneously, the elastic preload continuously applied by the elastic pads 4 maintains the sliding fixing rod 6 in contact with the inner circumferential wall of the blank, preventing the blank from loosening due to gaps in the contact. After adjustment, the sliding fixing rod 6 is rigidly locked again through the locking assembly. Throughout the entire axial length adjustment process, the slide block 2 remains in its original position, with its sidewall continuously pressed against the end wall of the blank, forming a stable end-face auxiliary fixation. This completely solves the technical problem of the blank easily shifting during traditional adjustment, ensuring the stability of the blank's positioning accuracy during adjustment.

[0032] In this embodiment, preferably, the locking assembly includes a second support ring 16, a locking ring 9 rotatably mounted inside the second support ring 16, multiple limiting rails 10 fixedly mounted inside the locking ring 9, and multiple slide blocks 11 slidably mounted on the limiting rails 10. The number of slide blocks 11 is the same as the number of sliding fixing rods 6. The slide blocks 11 are fixedly connected to the second slide block 8 via connecting rods 12. The side wall of the second slide block 8 away from the first slide block 2 is provided with an anti-slip surface 801. The anti-slip surface 801 has an anti-slip structure, so that the second slide block 8 is locked in the second slide groove when pushed by the connecting rod 12. Within 701, a three-slide groove is provided on the drive seat 18, and a four-slide seat 24 is slidably installed within the three-slide groove. A second support ring 16 is fixedly connected to the four-slide seat 24. A first hydraulic cylinder 25 is fixedly installed on the side wall of the drive seat 18. The output end of the first hydraulic cylinder 25 extends into the three-slide groove, and a push block 2501 is fixedly installed at the output end of the first hydraulic cylinder 25. When the push block 2501 is not in contact with the four-slide seat 24, the four-slide seat 24 has no external pressure, and the limiting rail 10 will not apply radial clamping force to the second slide seat 8 through the three-slide seat 11 and the connecting rod 12. The second slide seat 8 can move within the three-slide groove 701. Within 01, the sliding rod 6 and the mounting base 3 can slide radially within a small range limited by the two elastic pads 4. At this time, the axial movement resistance of the sliding rod 6 is extremely small, and the sliding rod 6 can be conveniently and accurately controlled to slide along the chuck 1 axis to complete the rapid adjustment of the extension length. After the length adjustment is completed, the output end of the hydraulic cylinder 25 is extended in a directional manner, driving the push block 2501 to move smoothly toward the slide block 24. The push block 2501 applies directional pressure to the slide block 24, which passes through the support ring 16, the locking ring 9, and the... The limiting rail 10 transmits the force to the slide block 3 11, which then applies a balanced radial clamping force to the slide block 2 8 through the connecting rod 12. This causes the anti-slip surface 801 on the slide block 2 8 to be tightly pressed against the inner wall of the slide groove 2 701. The frictional resistance of the anti-slip surface 801 is used to achieve rigid self-locking of the slide block 2 8, thereby locking the mounting base 3, slide block 2 8, slide block 3 11 and sliding fixing rod 6 as a whole. This completely eliminates the displacement deviation of each moving part during the cutting process, maintains the stable support and fixing effect of the sliding fixing rod 6 on the blank for a long time, and ensures the consistency of machining accuracy.

[0033] In this embodiment, preferably, an adjusting screw 5 is rotatably mounted on the slide block 2 along the radial direction of the chuck 1. The adjusting screw 5 is threadedly connected to the chuck 1. By rotating the adjusting screw 5, the slide block 2 can slide within the slide groove 101 to adjust the relative position of the sliding fixing rod 6 in the radial direction of the chuck 1, thereby controlling the clamping and fixing of the blank by the sliding fixing rod 6. The adjusting screw 5 can be rotated manually using tools or by electric or hydraulic drives. The radial clamping size can be precisely adjusted by using threaded fine adjustment, adapting to cylindrical blanks with different inner diameters and improving the versatility of the equipment. At the same time, the threaded drive has a self-locking characteristic, further enhancing the positioning stability of the slide block 2.

[0034] In this embodiment, preferably, a reinforcing ring 13 is provided on the inner side of the locking ring 9, and multiple limiting rails 10 are fixedly connected to the reinforcing ring 13 to improve the overall stability of the multiple limiting rails 10. The reinforcing ring 13 connects the multiple limiting rails 10 of the ring array into an overall frame structure, enhances the structural rigidity of the locking component, avoids deformation and misalignment of the limiting rails 10 during long-term compression locking, ensures the accuracy and reliability of the locking action, and extends the service life of the component.

[0035] The above description is only a preferred embodiment of the present invention. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of this patent application are included in the scope of this patent application.

Claims

1. A turning device for a precision bearing assembly, comprising two symmetrically arranged chucks (1), a rotary drive assembly for driving the chucks (1) to rotate, a drive base (17) for driving the chucks (1) to translate, and a cutting mechanism for cutting a workpiece, wherein the chucks (1) are provided with a plurality of radially arranged grooves (101), and the grooves (101) are provided through the chucks (1), characterized in that: A slide block (2) is slidably installed in the slide block (101), and a sliding fixing rod (6) is provided through the slide block (2). An adjustment component is provided on one side of the chuck (1) for driving the sliding fixing rod (6) to move along the axis of the chuck (1).

2. The turning equipment for precision bearing assemblies according to claim 1, characterized in that: The adjustment assembly includes an adjustment disk (7) and multiple slide blocks (8). The adjustment disk (7) is coaxially arranged with the chuck (1). Multiple slide grooves (701) are radially opened on the adjustment disk (7), and the slide grooves (701) are through the adjustment disk (7). The multiple slide blocks (8) are slidably arranged in the multiple slide grooves (701). The ends of the multiple sliding fixing rods (6) are fixedly connected to the multiple slide blocks (8).

3. A turning device for precision bearing assemblies according to claim 2, characterized in that: The upper surface of the drive base (17) is fixedly mounted with a first upright plate (19) and a second upright plate (20). A drive seat (18) is slidably arranged between the first upright plate (19) and the second upright plate (20). A support ring (15) is fixedly mounted on the upper surface of the drive seat (18). The adjustment disc (7) is rotatably mounted inside the support ring (15).

4. A turning device for precision bearing assemblies according to claim 3, characterized in that: A guide post 23 is fixedly installed between the first upright plate (19) and the second upright plate (20). The guide post 23 is slidably engaged with the drive seat (18). A drive screw (21) is rotatably installed between the first upright plate (19) and the second upright plate (20). The drive screw (21) passes through the drive seat (18) and is threadedly connected to the drive seat (18). A motor 1 (22) is fixedly installed on the second upright plate (20). The output end of the motor 1 (22) is fixedly connected to the end of the drive screw (21).

5. A turning device for precision bearing assemblies according to claim 3, characterized in that: The slide block one (2) has a through groove inside, and a mounting seat (3) is slidably arranged in the through groove. Two elastic pads (4) are symmetrically arranged in the through groove along the radial direction of the chuck (1). The mounting seat (3) is limited between the two elastic pads (4). Both elastic pads (4) apply pressure to the mounting seat (3). The adjusting plate (7) is provided with a locking component for locking the slide block two (8) on the side away from the chuck (1).

6. A turning device for precision bearing assemblies according to claim 5, characterized in that: The locking assembly includes a second support ring (16), a locking ring (9) rotatably mounted inside the second support ring (16), multiple limit rails (10) fixedly mounted inside the locking ring (9), and multiple slide blocks (11) slidably mounted on the limit rails (10). The slide blocks (11) are fixedly connected to the second slide block (8) via a connecting rod (12). The side wall of the second slide block (8) away from the first slide block (2) is provided with an anti-slip surface (801). The drive seat (18) is provided with a third slide groove. The fourth slide block (24) is slidably mounted in the third slide groove. The second support ring (16) is fixedly connected to the fourth slide block (24). The side wall of the drive seat (18) is fixedly mounted with a first hydraulic cylinder (25). The output end of the first hydraulic cylinder (25) extends into the third slide groove, and the output end of the first hydraulic cylinder (25) is fixedly mounted with a push block (2501).

7. A turning device for precision bearing assemblies according to claim 3, characterized in that: A support ring three (26) is fixedly installed on the upright plate one (19). The chuck (1) is rotatably disposed in the support ring three (26). The rotary drive assembly includes a gear one (27), a gear two (29), a mounting bracket (28), a drive shaft (30), and a motor two (32). The gear one (27) is fixedly connected to the chuck (1) and is coaxial with the chuck (1). The mounting bracket (28) is fixedly installed on the drive base (17). The gear two (29) is rotatably connected to the top of the mounting bracket (28) and meshes with the gear one (27). The output end of the motor two (32) is fixedly connected to the end of the drive shaft (30). The drive shaft (30) passes through the two gear two (29) and slides with the drive shaft (30).

8. A turning device for precision bearing assemblies according to claim 2, characterized in that: The cutting mechanism includes an inner cutting component and an outer cutting component. The inner cutting component is used to cut the inner peripheral wall of the blank, and the outer cutting component is used to cut the outer peripheral wall of the blank.

9. A turning device for precision bearing assemblies according to claim 8, characterized in that: The internal cutting assembly includes a second hydraulic cylinder (37), a support arm (33), an internal tool holder (34) fixedly installed at one end of the support arm (33), a first lifting seat (36) fixedly installed at the other end of the support arm (33), and an internal cutting tool (35) fixedly installed on the internal tool holder (34). The output end of the second hydraulic cylinder (37) is fixedly connected to the first lifting seat (36), and the second hydraulic cylinder (37) is fixedly connected to the frame of the turning equipment. The chuck (1) and the adjusting plate (7) are both provided with through holes for the support arm (33) to pass through.

10. A turning device for precision bearing assemblies according to claim 8, characterized in that: The external cutting assembly includes a hydraulic cylinder three (41), a lifting seat two (40) fixedly connected to the output end of the hydraulic cylinder three (41), an external tool holder (38) fixedly installed at the bottom of the lifting seat two (40), and an external cutting tool (39) fixedly installed on the external tool holder (38). The hydraulic cylinder three (41) is fixedly connected to the frame of the turning equipment.

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