Multi-functional roller vertical double-station super grinding machine

Abstract

The present application belongs to the technical field of bearing processing, and particularly relates to a multifunctional raceway vertical double-station superfinishing grinder. The combination structure of eccentric driving shaft and eccentric sleeve is adopted for the driving part of the raceway grinding mechanism and the rib grinding mechanism to realize the reciprocating motion of the grinding piece (oil stone), and the stroke of the oil stone can be adaptively adjusted by adjusting the angle offset amount of the eccentric sleeve relative to the eccentric driving shaft when the rib width and the raceway width are different, so that the working operation of the ribs and the raceway faces with different widths is completed. Meanwhile, the angle adjustment structure is arranged on the raceway grinding mechanism and the rib grinding mechanism to adaptively adjust the inclination angle of the rib grinding piece and the raceway face grinding assembly relative to the bearing ring, so that the working operation of the ribs and the raceway faces of the bearing ring at different angles is realized.

Description

Technical Field

[0001] This invention belongs to the field of bearing processing technology, and in particular relates to a multi-functional vertical dual-station ultra-precision grinding machine with raceways. Background Technology

[0002] Roller bearings consist of an inner ring, an outer ring, and rollers between them. During the manufacturing process, the raceway surfaces of both the inner and outer rings need to be ground. For the inner ring, the flange on one side of the raceway surface also needs to be ground. Traditional inner ring grinding requires two separate machines to process the flange and raceway surface, necessitating two clamping operations. This leads to deviations in the reference datum, resulting in substandard inner ring accuracy.

[0003] Existing equipment for grinding the inner ring flange and raceway of bearings has the following problems:

[0004] 1. Existing flange and raceway grinding equipment does not have the capability to adjust the grinding angle of the flange and raceway when performing ultra-precision operations on the inner ring of bearings;

[0005] 2. Existing flange and raceway grinding equipment does not have the capability to adjust the grinding stroke of flanges and raceways when performing ultra-precision operations on bearing inner rings;

[0006] 3. Existing edge and raceway grinding equipment, especially for vertical roughing, finishing and super-precision operations in dual-station applications, lacks loading and unloading devices that can better connect the two stations. Summary of the Invention

[0007] The technical problem to be solved by this invention is:

[0008] Existing integrated grinding equipment for flanges and raceways does not address the issue of adjusting the angles of flanges and raceways during ultra-precision grinding of bearing inner rings.

[0009] To solve the above-mentioned technical problems, the inventors, through practice and summarization, derived the technical solution of this invention, which adopts the following technical solution:

[0010] The multi-functional vertical dual-station ultra-precision grinding machine with raceway includes two processing units, each of which includes:

[0011] The edge grinding mechanism includes a transverse slide, a edge grinding seat is mounted on the top of the transverse slide, and an edge grinding component is mounted on the edge grinding seat via an angle adjustment structure.

[0012] The raceway grinding mechanism includes a raceway grinding slide, an adjustment frame is mounted on the top of the raceway grinding slide, a raceway grinding seat and an adjustment component for adjusting the angle of the raceway grinding seat are mounted on the adjustment frame, and a raceway grinding component is mounted on the raceway grinding seat.

[0013] The servo electric drive mechanism includes a servo electric drive spindle located in the area below the grinding station and a pressing assembly located in the area above the grinding station. The pressing assembly is used to press against the top end face of the bearing steel ring.

[0014] Preferably, the angle adjustment structure includes a worm and a worm wheel mounted on a side-grinding seat, the worm and worm wheel cooperating, a drive gear mounted on the rotating shaft of the worm wheel, an operating lever provided at one end of the worm, an arc-shaped rack meshing with the drive gear mounted on the side-grinding assembly, an arc-shaped slot mounted on the side-grinding seat, a clamping bolt mounted in the arc-shaped slot, and the clamping bolt mounted on the side-grinding assembly.

[0015] Preferably, the flange grinding assembly includes a first grinding drive assembly and a flange grinding assembly, and the raceway grinding assembly includes a second grinding drive assembly and a raceway grinding assembly;

[0016] Both grinding drive assembly one and grinding drive assembly two are equipped with a fixed base. A servo motor is mounted on the fixed base. An eccentric drive shaft is mounted on the output end of the servo motor. One end of the eccentric drive shaft is rotatably mounted on the fixed base. An eccentric sleeve, an adjusting sleeve, and a locking nut are mounted on the eccentric drive shaft. Rolling elements are mounted on the outer side of the eccentric sleeve. The adjusting sleeve is axially slidingly fitted on the eccentric drive shaft, and the side in contact with the eccentric sleeve is an annular toothed surface. The locking nut is used to press the adjusting sleeve so that the corresponding ends of the eccentric sleeve and the adjusting sleeve are in contact and remain relatively stationary.

[0017] A movable frame is fitted on the outer side of the rolling element. The movable frame is slidably fitted on the fixed seat. The movable frame is used to install the edge grinding assembly or the raceway grinding assembly. A guide body is installed on the fixed seat, and one end of the guide body is inserted into the movable frame. An elastic body is fitted on the outer side of the guide body.

[0018] Preferably, the edge grinding assembly includes a mounting plate mounted on a movable frame via a rotating shaft. The movable frame is provided with an angle adjustment groove. The mounting plate limits the angle between the mounting plate and the movable frame by a locking bolt in the angle adjustment groove. An adjustment screw is rotatably mounted on the movable frame. The adjustment screw is used to adjust the angle between the mounting plate and the movable frame. The mounting plate is used to mount the edge grinding part.

[0019] Preferably, the adjustment assembly includes an operating shaft, a worm shaft, and a worm wheel seat. The operating shaft and the worm shaft form a transmission engagement through gear transmission. The worm shaft and the worm wheel seat form a transmission engagement. The worm wheel seat is rotatably mounted on the adjustment frame and fixed on the raceway grinding seat.

[0020] Preferably, the pressing assembly includes a frame, with vertically arranged pressing slides installed on both sides of the frame. A pressing cylinder is installed on the top of the pressing slide, along with the piston end of the pressing cylinder and the pressing slide. A pressing component is installed on the pressing slide, and the bottom of the pressing component is provided with a socket body inserted into the bearing steel ring and a pressing rolling body pressed against the top surface of the bearing steel ring.

[0021] Preferably, a rear positioning arc-shaped seat is independently provided on the rear side of the servo electric drive spindle, the center of the rear positioning arc-shaped seat is on the axis of the servo electric drive spindle, and two radially arranged adjusting support rollers are installed on the rear positioning arc-shaped seat;

[0022] The servo electric drive spindle includes a drive spindle, a drive disk, and a top plate mounted on top of the drive disk via springs.

[0023] Preferably, the front side of the processing unit is independently provided with a horizontally arranged loading and unloading mechanism;

[0024] The loading and unloading mechanism includes a horizontally arranged conveyor chain and two sets of loading and unloading components corresponding to the processing units. The side of the conveyor chain is equipped with two sets of material blocking components and position control components. The material blocking components include two parallel material blocking cylinders, which are used to control the passage of a single bearing steel ring each time. The position control components include a moving table independently set on the front side of the conveyor chain and a position control cylinder. A limit plate spanning the conveyor chain is installed on the top of the moving table. A magnetic attractor is installed on the side of the limit plate facing the bearing steel ring. The piston rod of the position control cylinder is installed on the moving table.

[0025] The loading and unloading assembly includes a longitudinal cylinder independently installed below the conveyor chain plate. The piston rod of the longitudinal cylinder is equipped with a movable frame, and the loading and unloading plates are installed on the movable frame. The loading and unloading plates are located above the conveyor chain plate and the limiting plate. The loading and unloading plates are equipped with two notches arranged in front and behind and two notches arranged in the left and right. The bottom of the loading and unloading plates is equipped with a baffle.

[0026] Preferably, the bottom of the baffle is provided with an installation groove, and a clamping claw is rotatably installed in the installation groove. One end of the clamping claw contacts the top edge of the bearing steel ring. The side of the installation groove is provided with an arc-shaped guide groove centered on the rotation node of the clamping claw. The depth of the arc-shaped guide groove decreases from top to bottom and then increases. The lower end of the arc-shaped guide groove is provided with a limiting recess. An elastic pin is installed on the side of the clamping claw and slides in the arc-shaped guide groove.

[0027] The bottom of the upper and lower material plates is provided with a sink trough. A lifting top plate is installed in the sink trough through an elastic element. A connecting rope is installed at the bottom of the lifting top plate. The free end of the connecting rope passes through the stop bar, enters the installation groove, and is connected to the clamping claw.

[0028] The mounting groove contains a traction body that slides back and forth. One end of the traction body is exposed on the outside of the mounting groove, and the other end is connected to a traction rope. The traction rope is connected to the clamping claw. The traction body located on the outside of the mounting groove has an internal wedge surface.

[0029] A vertical rod is installed on the limit plate, and a horizontal component is installed on the top of the vertical rod. A wedge-shaped body is provided on the side of the horizontal component opposite to the stop bar and corresponds to the horizontal position of the built-in wedge surface.

[0030] The bottom of the lifting platform is angled downwards on the side furthest from the bearing steel ring.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] 1. This invention uses a single clamping process to complete the machining of the inner ring's flange and raceway surface. The pressing rolling element (self-aligning bearing) of the top pressing assembly presses the inner ring onto the servo-driven spindle. The servo-driven spindle drives the inner ring to rotate. At the same time, the flange grinding mechanism grinds the flange on the left side, and the raceway grinding mechanism grinds the raceway surface on the right side, thus completing the rough and fine grinding operations. The drive components of the raceway grinding mechanism and the flange grinding mechanism employ a combination of an eccentric drive shaft and an eccentric sleeve to achieve the reciprocating motion of the grinding workpiece (oilstone). When the flange width and raceway surface width differ, the stroke of the oilstone can be adaptively adjusted by changing the angular offset of the eccentric sleeve relative to the eccentric drive shaft, thus enabling the machining of flanges and raceway surfaces of varying widths. Compared to traditional swing arm transmission, this reduces overall vibration inertia. An elastic body is installed between the moving frame and the fixed seat to ensure a tight fit between the moving frame and the rolling elements, reducing vibration and inertia at the reversing pole. The rolling elements (bearings) effectively reduce friction between them. Both the raceway grinding mechanism and the flange grinding mechanism are equipped with angle adjustment structures to adaptively adjust the tilt angle of the flange grinding workpiece and the raceway surface grinding assembly relative to the bearing steel ring, enabling the machining of the bearing steel ring flange and raceway surface at different angles.

[0033] 2. This invention uses rolling elements (bearings) mounted on the outer side of the eccentric sleeve to drive the corresponding structure to achieve reciprocating motion. The spring component is used to ensure that the outer circumferential surface of the bearing and the corresponding structure are always in contact without abnormal noise or vibration, thus ensuring the quality and precision of the ground surface.

[0034] 3. This invention uses a dual-station system to achieve vertical rough and fine grinding, and the loading and unloading mechanism enables better line operation between the two stations, thus making the structure more compact.

[0035] 4. The present invention also makes targeted improvements to the conveying mechanism. Instead of using loading and unloading channels in conjunction with transfer robots to realize loading and unloading, it uses a conveyor chain plate and longitudinally reciprocating loading and unloading plates to complete the loading and unloading of the inner ring, thereby realizing the conveying of the inner ring and the loading and unloading action that can be freely switched between the conveyor chain plate and the processing station. By realizing the connection in a simpler way, the equipment space is also rationally laid out.

[0036] 5. When the loading and unloading plates of this invention load the bearing steel ring to the processing station, because the adjusting support roller is located below the loading and unloading plates, it cannot ensure that the bearing steel ring is transported horizontally to the processing station. That is, when the bearing steel ring is at the processing station, firstly, the bottom sidewall of the bearing steel ring cannot effectively fit against the adjusting support roller; secondly, the top sidewall of the bearing steel ring excessively presses against the front retaining strip sidewall, causing eccentricity during the grinding operation, which leads to coaxiality problems of the retaining edge, raceway surface and inner diameter. Alternatively, the retaining strip sidewall applies resistance to the top of the bearing steel ring, causing horizontal eccentric oscillation during the rotation of the bearing steel ring, which in turn affects the processing accuracy of the bearing steel ring. Therefore, this invention utilizes clamping claws arranged in a front-to-back direction on the stop bar. These claws can release and lift the bearing ring under different working conditions. After the material is loaded to the machining station, the bearing ring descends due to the downward pressure of the rolling element at the top, while the lower top plate sinks a certain distance (compressing the spring). This causes the clamping claws to disengage from the lower side wall of the top stop. The clamping claws are then moved to the limiting recess and restricted by the elastic pin, achieving separation from the bearing ring and releasing the force. This addresses the eccentricity problem caused by resistance during grinding. After each machining cycle... After completion, as the force of the downward rolling element is released, the lower top plate, under the action of the spring, will cause the bearing steel ring to be clamped again by the clamping claw. Then, it will be sent back to the top of the conveyor chain plate by the upper and lower material plates. Using the wedge-shaped body of the transverse horizontal bar on the limit plate, the clamping claw will be opened again, thereby releasing the processed bearing steel ring. Under the action of the limit plate, it will be moved out between the two stops. The new bearing steel ring will enter between the two stops. Through the pull of the magnetic attraction, the top of the bearing steel ring will be lifted by the lifting top plate to complete the clamping and lifting. The processed bearing steel ring will be conveyed to the next station by the conveyor. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0038] Figure 2 This is a schematic diagram of the overall structure of the present invention without the loading and unloading mechanism installed;

[0039] Figure 3 This is a diagram showing the positional distribution of the edge grinding mechanism, the raceway grinding mechanism, and the servo-driven spindle of the present invention.

[0040] Figure 4This is a schematic diagram of the overall structure of the edge grinding mechanism of the present invention;

[0041] Figure 5 , Figure 6 These are schematic diagrams of the edge grinding assembly of the present invention from two different perspectives;

[0042] Figure 7 This is a schematic diagram of the overall structure of the raceway grinding mechanism of the present invention;

[0043] Figure 8 This is a schematic diagram of the structure on the mounting base of the present invention;

[0044] Figure 9 for Figure 8 The main view;

[0045] Figure 10 for Figure 9 Cross-sectional view at point AA;

[0046] Figure 11 This is a schematic diagram of the overall structure of the pressing component of the present invention;

[0047] Figure 12 This is a schematic diagram of the overall structure of the loading and unloading mechanism of the present invention;

[0048] Figure 13 This is a structural diagram of the rear positioning arc-shaped seat of the present invention;

[0049] Figure 14 , Figure 15 These are structural diagrams of the loading and unloading assembly of the present invention from two different perspectives;

[0050] Figure 16 This is a front and rear cross-sectional view of the clamping claw of the present invention clamping the bearing steel ring;

[0051] Figure 17 for Figure 16 A magnified view of a section at point A in the middle;

[0052] Figure 18 for Figure 17 Diagram showing the state of the middle clamping jaws releasing the bearing steel ring;

[0053] Figure 19 This is a side view of the gripper.

[0054] Figure 20 This is a structural diagram of the lifting roof panel;

[0055] Figure 21 Structural diagram of the position control component

[0056] Figure 22 This is a diagram showing the connection between the drive spindle and the drive disk.

[0057] In the picture:

[0058] 100. Loading / unloading mechanism; 110. Conveyor chain plate; 111. Material blocking cylinder; 112. Moving table; 113. Position control cylinder; 114. Limit plate; 1141. Vertical rod; 1142. Horizontal component; 1143. Wedge-shaped body; 115. Magnetic suction body; 120. Loading / unloading assembly; 121. Longitudinal cylinder; 122. Moving frame; 123. Loading / unloading plate; 1231. Elastic component; 1232. Lifting top plate; 1233. Connecting rope; 124. Stop bar; 1241. Mounting groove; 1242. Clamping claw; 1243. Arc-shaped guide groove; 1244. Limiting recess; 1245. Elastic pin; 1246. Pulling body; 1247. Pulling rope;

[0059] 200. Edge grinding mechanism; 210. Transverse slide table; 220. Edge grinding seat; 230. Edge grinding assembly; 231. Edge grinding assembly; 232. Fixed seat; 233. Servo motor; 234. Eccentric drive shaft; 235. Eccentric sleeve; 236. Adjusting sleeve; 237. Locking nut; 238. Rolling element; 239. Moving frame; 2310. Guide body; 2311. Mounting plate; 2312. Angle adjustment groove; 2313. Locking bolt; 2314. Adjusting screw; 2315. Elastic body; 2316. Edge grinding component; 240. Angle adjustment structure; 241. Operating lever; 242. Drive gear; 243. Arc rack; 244. Arc groove; 245. Clamping bolt;

[0060] 300. Raceway grinding mechanism; 310. Raceway grinding slide; 320. Adjusting frame; 330. Raceway grinding seat; 340. Adjusting assembly; 341. Operating shaft; 342. Worm shaft; 343. Worm gear seat; 350. Raceway grinding assembly; 351. Raceway grinding assembly;

[0061] 400. Pressing assembly; 410. Frame; 420. Pressing slide plate; 430. Pressing cylinder; 440. Pressing component; 441. Socket; 442. Pressing rolling element;

[0062] 500. Servo electric drive spindle; 501. Rear positioning arc-shaped seat; 502. Adjustable support roller; 503. Drive spindle; 504. Drive plate; 505. Spring component; 506. Top plate. Detailed Implementation

[0063] like Figure 1 , 2 As shown in Figures 3, 4, 7, and 11, the multi-functional roller-track vertical dual-station ultra-precision grinding machine includes two processing units symmetrically distributed laterally. Each processing unit includes:

[0064] The edge grinding mechanism 200 includes a transverse slide 210, a edge grinding seat 220 mounted on the top of the transverse slide 210, and an edge grinding assembly 230 mounted on the edge grinding seat 220 via an angle adjustment structure 240. The tilt angle of the edge grinding surface is adjusted by the angle adjustment structure 240, and the transverse slide 210 is used to adjust the lateral position of the edge grinding seat 220 to move closer to or further away from the bearing steel ring.

[0065] The raceway grinding mechanism 300 includes a raceway grinding slide 310, an adjustment frame 320 mounted on the top of the raceway grinding slide 310, a raceway grinding seat 330 mounted on the adjustment frame 320, and an adjustment component 340 for adjusting the angle of the raceway grinding seat 330. A raceway grinding component 350 is mounted on the raceway grinding seat 330. The raceway grinding slide 310 is used to laterally adjust the position of the adjustment frame 320 to move closer to or further away from the bearing steel ring. The adjustment component 340 is used to adjust the tilt angle of the raceway grinding seat 330 relative to the bearing steel ring, thereby realizing the grinding operation of the raceway surface at different angles.

[0066] The servo-driven mechanism includes a servo-driven spindle 500 located below the grinding station and a pressing assembly 400 located above the grinding station. The pressing assembly 400 is used to press the bearing steel ring onto the top end face of the bearing. The pressing assembly 400 presses the bearing steel ring onto the servo-driven spindle 500, which drives it to rotate at high speed, allowing the flange grinding mechanism 200 and the raceway grinding mechanism 300 to perform machining operations on it respectively.

[0067] Based on the above scheme, the angle adjustment structure 240 includes a worm and a worm wheel mounted on the edge grinding seat 220. The worm and worm wheel cooperate, and a drive gear 242 is mounted on the rotating shaft of the worm wheel. An operating lever 241 is provided at one end of the worm. An arc-shaped rack 243 that meshes with the drive gear 242 is mounted on the edge grinding assembly 230. An arc-shaped slot 244 is mounted on the edge grinding seat 220, and a clamping bolt 245 is installed in the arc-shaped slot 244. The clamping bolt 245 is mounted on the edge grinding assembly 230. By rotating the operating lever 241, the arc-shaped rack 243 is rotated by the drive gear 242 at a certain angle. Due to the self-locking of the worm and worm wheel, the angle can remain relatively stable after adjustment. After the angle is adjusted, in order to ensure the stability of the edge grinding assembly 230 relative to the edge grinding seat 220, the clamping bolt 245 is used to complete the position and angle restriction operation.

[0068] Based on the above solutions, such as Figures 3 to 7 As shown, the edge grinding assembly 230 includes a first grinding drive assembly and an edge grinding assembly 231, and the raceway grinding assembly 350 includes a second grinding drive assembly and a raceway grinding assembly 351.

[0069] like Figures 8 to 10 As shown, both grinding drive assembly one and grinding drive assembly two are provided with a fixed base 232. A servo motor 233 is mounted on the fixed base 232. An eccentric drive shaft 234 is mounted on the output end of the servo motor 233. One end of the eccentric drive shaft 234 is rotatably mounted on the fixed base 232. An eccentric sleeve 235, an adjusting sleeve 236 and a locking nut 237 are mounted on the eccentric drive shaft 234. A rolling element 238 is mounted on the outer side of the eccentric sleeve 235. The adjusting sleeve 236 is axially slidingly fitted on the eccentric drive shaft 234 and the side in contact with the eccentric sleeve 235 is an annular toothed surface. The locking nut 237 is used to press the adjusting sleeve 236 so that the corresponding ends of the eccentric sleeve 235 and the adjusting sleeve 236 are in contact and remain relatively stationary.

[0070] A movable frame 239 is fitted on the outer side of the rolling element 238. The movable frame 239 is slidably fitted on the fixed seat 232. The movable frame 239 is used to install the edge grinding assembly 231 or the raceway grinding assembly 351. A guide body 2310 is installed on the fixed seat 232, and one end of the guide body 2310 is inserted into the movable frame 239. An elastic body 2315 is fitted on the outer side of the guide body 2310.

[0071] Since the stroke of the moving frame 239 needs to be adjusted when processing flanges and raceway surfaces of different widths, the locking nut 237 is first unlocked to release the squeezing force on the adjusting sleeve 236. The adjusting sleeve 236 slides axially relative to the eccentric drive shaft 234, adjusting the angle of the eccentric sleeve 235 relative to the eccentric drive shaft 234 by a certain amount. Then, the angle of the eccentric sleeve 235 is limited by the annular toothed surface of the adjusting sleeve 236. Finally, the locking nut 237 is pressed and fixed, thereby completing the adjustment of the eccentricity and the stroke.

[0072] Based on the above solutions, such as Figure 4 and Figure 5 As shown, the edge grinding assembly 231 includes a mounting plate 2311 mounted on a movable frame 239 via a rotating shaft. The movable frame 239 has an angle adjustment groove 2312. The mounting plate 2311's angle relative to the movable frame 239 is limited by a locking bolt 2313 within the angle adjustment groove 2312. An adjusting screw 2314 is rotatably mounted on the movable frame 239. The adjusting screw 2314 is used to adjust the angle of the mounting plate 2311 relative to the movable frame 239. The mounting plate 2311 is used to mount the edge grinding component 2316. Loosening the locking bolt 2313 and then adjusting the screw 2314 adjusts the position and angle of the mounting plate 2311. After rotating the edge grinding component 2316 around the rotating shaft by a certain angle and adjusting it, the locking bolt 2313 is used to lock and fix it in place.

[0073] Based on the above solutions, such as Figure 7As shown, the adjustment assembly 340 includes an operating shaft 341, a worm shaft 342, and a worm gear seat 343. The operating shaft 341 is connected to the worm shaft 342 via gear transmission. The worm shaft 342 is connected to the worm gear seat 343 via gear transmission. The worm gear seat 343 is rotatably mounted on the adjustment frame 320 and fixed to the raceway grinding seat 330. The angle of the raceway grinding seat 330 is adjusted by adjusting the angle of the worm gear seat 343 via the operating shaft 341 through the gears and worm shaft 342.

[0074] Based on the above solutions, such as Figure 11 As shown, the pressing assembly 400 includes a frame 410, with vertically arranged pressing slide plates 420 installed on both sides of the frame 410. A pressing cylinder 430 is installed on the top of the pressing slide plate 420. The piston end of the pressing cylinder 430 and the pressing slide plate 420 are connected. A pressing component 440 is installed on the pressing slide plate 420. The bottom of the pressing component 440 is provided with a socket body 441 that is inserted into the bearing steel ring and a pressing rolling element 442 (self-aligning bearing) that is pressed against the top surface of the bearing steel ring. The pressing cylinder 430 drives the pressing slide plate 420 and the pressing component 440 to move downward, and the bearing steel ring is pressed against the top surface of the top plate 506 of the servo electric drive spindle 500 by the pressing rolling element 442.

[0075] Based on the above solutions, such as Figure 13 As shown, a rear positioning arc-shaped seat 501 is independently provided on the rear side of the servo electric drive spindle 500. The center of the rear positioning arc-shaped seat 501 is on the axis of the servo electric drive spindle 500. Two radially arranged adjusting support rollers 502 are installed on the rear positioning arc-shaped seat 501.

[0076] like Figure 22 As shown, the servo electric drive spindle 500 includes a drive spindle 503, a drive disk 504, and a top disk 506 mounted on top of the drive disk 504 via a spring member 505. The drive spindle 503 drives the drive disk 504 to rotate, and the top disk 506 slides axially relative to the drive disk 504 via the spring member 505, achieving a certain downward movement of the bearing steel ring under the squeezing action of the downward rolling element 442.

[0077] Based on the above solutions, such as Figure 1 As shown, a horizontally arranged loading and unloading mechanism 100 is independently provided on the front side of the processing unit; the loading and unloading mechanism 100 is used to connect the two vertical processing units.

[0078] like Figure 12As shown, the loading and unloading mechanism 100 includes a horizontally arranged conveyor chain plate 110 and two sets of loading and unloading components 120 corresponding to the processing units. The side of the conveyor chain plate 110 is provided with two sets of material blocking components and position control components. The material blocking components include two parallel material blocking cylinders 111. The material blocking cylinders 111 are used to control the passage of a single bearing steel ring each time.

[0079] like Figure 21 As shown, the position control assembly includes a movable table 112 independently mounted on the front side of the conveyor chain plate 110 and a position control cylinder 113. A limiting plate 114 spanning the conveyor chain plate 110 is installed on the top of the movable table 112. A magnetic chuck 115 is installed on the side of the limiting plate 114 facing the bearing steel ring. The magnetic chuck 115 is used to drive the bearing steel ring to move effectively and synchronously when the limiting plate 114 moves laterally, and can also squeeze the lifting top plate 1232 upward. The piston rod of the position control cylinder 113 is mounted on the movable table 112. The position control cylinder 113 is used to move the limiting plate 114 laterally. When a single bearing steel ring conveyed by the stop cylinder 111 is attracted by the magnetic chuck 115, the magnetic chuck 115 is used to move the bearing steel ring synchronously until the bearing steel ring and the front and rear positions of the processing station coincide, and it also enters between the two stop bars 124.

[0080] like Figure 14 and 15 As shown, the loading and unloading assembly 120 includes a longitudinal cylinder 121 independently disposed below the conveyor chain plate 110. A movable frame 122 is mounted on the piston rod of the longitudinal cylinder 121. A loading and unloading plate 123 is mounted on the movable frame 122, located above the conveyor chain plate 110 and the limiting plate 114. The loading and unloading plate 123 has two notches arranged front-to-back and two notches arranged left-to-right. A stop bar 124 is mounted at the bottom of the loading and unloading plate 123. After the bearing steel ring enters between the two stop bars 124, the longitudinal cylinder 121 moves back and forth via the movable frame 122, and then the loading and unloading plate 123 loads the bearing steel ring onto the top plate 506. After the rolling element 442 presses down on the bearing steel ring, the bearing steel ring and the stop bar 124 can be separated.

[0081] Based on the above solution, when the loading and unloading plates transfer the bearing steel ring to the machining station, the adjusting support rollers, located below the loading and unloading plates, cannot ensure that the bearing steel ring is horizontally transported to the machining station. Specifically, when the bearing steel ring is at the machining station, firstly, the bottom sidewall of the bearing steel ring cannot effectively adhere to the adjusting support rollers; secondly, the top sidewall of the bearing steel ring excessively presses against the front retaining strip sidewall, causing eccentricity during grinding and resulting in coaxiality issues with the retaining edge, raceway surface, and inner diameter. Alternatively, the retaining strip sidewall exerts resistance on the top of the bearing steel ring, causing horizontal eccentric oscillation during rotation, thus affecting the machining accuracy of the bearing steel ring. Therefore, the following improvements are made:

[0082] like Figure 16-18 As shown, the bottom of the baffle 124 is provided with a mounting groove 1241, and a clamping claw 1242 is rotatably mounted in the mounting groove 1241. One end of the clamping claw 1242 contacts the top edge of the bearing steel ring. The side of the mounting groove 1241 is provided with an arc-shaped guide groove 1243 centered on the rotation node of the clamping claw 1242. The depth of the arc-shaped guide groove 1243 decreases from top to bottom and then increases. The lower end of the arc-shaped guide groove 1243 is provided with a limiting recess 1244. An elastic pin 1245 is installed on the side of the clamping claw 1242. The elastic pin 1245 slides within the arc-shaped guide groove 1243.

[0083] The bottom of the loading and unloading plate 123 is provided with a sink trough. A lifting top plate 1232 is installed in the sink trough via an elastic element 1231. A connecting rope 1233 is installed at the bottom of the lifting top plate 1232. The free end of the connecting rope 1233 passes through the stop bar 124, enters the mounting groove 1241, and is connected to the clamping claw 1242.

[0084] The mounting groove 1241 is equipped with a traction body 1246 that slides back and forth. One end of the traction body 1246 is exposed on the outside of the mounting groove 1241, and the other end is connected to a traction rope 1247. The traction rope 1247 is connected to the clamping claw 1242. The traction body 1246 located on the outside of the mounting groove 1241 is provided with an internal wedge surface.

[0085] A vertical rod 1141 is installed on the limiting plate 114, and a horizontal component 1142 is installed on the top of the vertical rod 1141. A wedge surface 1143 is provided on the side of the horizontal component 1142 opposite to the stop bar 124 and corresponds to the horizontal position of the built-in wedge surface.

[0086] The bottom of the lifting top plate 1232 is set at an angle downwards on the side away from the bearing steel ring.

[0087] As the limiting plate 114 moves horizontally, the wedge body 1143 first moves the pulling body 1246 outward through the action of the built-in wedge surface. Then, the pulling rope 1247 rotates the clamping claw 1242 downward, thereby lowering the processed bearing steel ring between the two stop bars 124 and placing it on the conveyor chain plate 110. Then, the limiting plate 114 moves horizontally out of the right side of the stop bar 124. At the same time, the magnetic suction body 115 on the left side drives the bearing steel ring to move horizontally. The bearing steel ring will squeeze the bottom of the lifting top plate 1232 at an angle downward, causing the lifting top plate 1232 to move upward and compress the elasticity. Component 1231, and simultaneously the clamping claw 1242 is moved upward via the connecting rope 1233. The elastic pin 1245 will first disengage from the limiting recess 1244 and pass through the position of minimum depth of the arc guide groove 1243. The elastic pin 1245 will cooperate with the depth structure of the arc guide groove 1243 to complete the automatic upward movement of the clamping claw 1242 until it clamps the upper edge of the bearing steel ring. The bearing steel ring is then moved upward to a certain height to disengage from the conveyor chain plate 110 until the top and the bottom surface of the upper and lower material plates 123 are in contact. Finally, the clamping claw 1242 clamps the bearing steel ring from front to back.

[0088] The loading and unloading plates 123 move backward and load the bearing steel ring onto the top of the top plate 506, with its side attached to the adjusting support roller 502. The rolling element 442 presses down on the top surface of the bearing steel ring. As the bearing steel ring descends, the clamping claw 1242 rotates downward. When the elastic pin 1245 descends through the minimum depth of the arc-shaped guide groove 1243, the elastic pin 1245 will continue to descend in accordance with the depth change of the arc-shaped guide groove 1243 until the clamping claw 1242 and the upper stop edge of the bearing steel ring separate. During this process, the top plate 506 will descend and compress the spring 505. The top of the bearing steel ring will also separate from the lifting top plate 1232, and the stop edge and raceway surface processing operations will be performed. After processing, the downward pressure of the rolling element 442 is released, and the spring 505 moves the top plate 506 and the bearing steel ring upward until the top surface of the bearing steel ring moves the lifting plate 1232 upward. The clamping claw 1242 moves upward via the connecting rope 1233 until the elastic pin 1245 passes through the minimum depth position of the arc guide groove 1243. The clamping claw 1242 continues to move upward to re-clamp the bearing steel ring and make the top surface fit against the bottom surface of the upper and lower material plates 123. The upper and lower material plates 123 transport the bearing steel ring forward until it returns to the top of the conveyor chain plate 110.

Claims

1. A multi-functional vertical dual-station ultra-precision grinding machine with raceways, comprising two processing units, characterized in that, Each of the aforementioned processing units includes: The edge grinding mechanism (200) includes a transverse slide (210), an edge grinding seat (220) is mounted on the top of the transverse slide (210), and an edge grinding assembly (230) is mounted on the edge grinding seat (220) via an angle adjustment structure (240). The raceway grinding mechanism (300) includes a raceway grinding slide (310), an adjustment frame (320) is mounted on the top of the raceway grinding slide (310), a raceway grinding seat (330) and an adjustment assembly (340) for adjusting the angle of the raceway grinding seat (330) are mounted on the adjustment frame (320), and a raceway grinding assembly (350) is mounted on the raceway grinding seat (330). The servo electric drive mechanism includes a servo electric drive spindle (500) located in the area below the grinding station and a pressing assembly (400) located in the area above the grinding station. The pressing assembly (400) is used to press against the top end face of the bearing steel ring. The edge grinding assembly (230) includes a grinding drive assembly one and an edge grinding assembly (231), and the raceway grinding assembly (350) includes a grinding drive assembly two and a raceway grinding assembly (351). Both grinding drive assembly one and grinding drive assembly two are provided with a fixed base (232). A servo motor (233) is installed on the fixed base (232). An eccentric drive shaft (234) is installed at the output end of the servo motor (233). One end of the eccentric drive shaft (234) is rotatably installed on the fixed base (232). An eccentric sleeve (235), an adjusting sleeve (236) and a locking nut (237) are installed on the eccentric drive shaft (234). A rolling element (238) is installed on the outer side of the eccentric sleeve (235). The adjusting sleeve (236) is axially slidingly fitted on the eccentric drive shaft (234) and the side that contacts the eccentric sleeve (235) is an annular tooth surface. The locking nut (237) is used to press the adjusting sleeve (236) so that the corresponding ends of the eccentric sleeve (235) and the adjusting sleeve (236) contact each other and remain relatively stationary. A movable frame (239) is fitted on the outer side of the rolling element (238). The movable frame (239) is slidably fitted on the fixed seat (232). The movable frame (239) is used to install the flange grinding assembly (231) or the raceway grinding assembly (351). A guide body (2310) is installed on the fixed seat (232) and one end of the guide body (2310) is inserted into the movable frame (239). An elastic body (2315) is fitted on the outer side of the guide body (2310). The edge grinding assembly (231) includes a mounting plate (2311) mounted on a movable frame (239) via a rotating shaft. An angle adjustment groove (2312) is provided on the movable frame (239). The mounting plate (2311) limits the angle of the mounting plate (2311) relative to the movable frame (239) by a locking bolt (2313) in the angle adjustment groove (2312). An adjustment screw (2314) is rotatably mounted on the movable frame (239). The adjustment screw (2314) is used to adjust the angle of the mounting plate (2311) relative to the movable frame (239). The mounting plate (2311) is used to mount the edge grinding part (2316).

2. The multi-functional vertical dual-station ultra-precision grinding machine with raceway as described in claim 1, characterized in that, The angle adjustment structure (240) includes a worm and a worm wheel mounted on the edge grinding seat (220). The worm and the worm wheel cooperate, and a drive gear (242) is mounted on the rotating shaft of the worm wheel. An operating lever (241) is provided at one end of the worm. An arc-shaped rack (243) that meshes with the drive gear (242) is mounted on the edge grinding assembly (230). An arc-shaped slot (244) is mounted on the edge grinding seat (220). A clamping bolt (245) is installed in the arc-shaped slot (244). The clamping bolt (245) is mounted on the edge grinding assembly (230).

3. The multi-functional vertical dual-station ultra-precision grinding machine with raceway as described in claim 1, characterized in that, The adjustment assembly (340) includes an operating shaft (341), a worm shaft (342), and a worm wheel seat (343). The operating shaft (341) is connected to the worm shaft (342) via gear transmission. The worm shaft (342) and the worm wheel seat (343) are connected to each other via transmission. The worm wheel seat (343) is rotatably mounted on the adjustment frame (320) and fixed on the raceway grinding seat (330).

4. The multi-functional vertical dual-station ultra-precision grinding machine with raceway as described in claim 1, characterized in that, The pressing assembly (400) includes a frame (410), and vertically arranged pressing slides (420) are installed on both sides of the frame (410). A pressing cylinder (430) is installed on the top of the pressing slide (420). The piston end of the pressing cylinder (430) and the pressing slide (420) are connected. A pressing component (440) is installed on the pressing slide (420). The bottom of the pressing component (440) is provided with a socket (441) inserted into the bearing steel ring and a pressing rolling element (442) pressed against the top surface of the bearing steel ring.

5. The multi-functional vertical dual-station ultra-precision grinding machine with raceway as described in claim 1, characterized in that, The servo drive spindle (500) is independently provided with a rear positioning arc seat (501) on its rear side. The center of the rear positioning arc seat (501) is on the axis of the servo drive spindle (500). Two radially arranged adjustment support rollers (502) are installed on the rear positioning arc seat (501). The servo electric drive spindle (500) includes a drive spindle (503), a drive disk (504), and a top disk (506) mounted on top of the drive disk (504) via a spring member (505).

6. The multi-functional vertical dual-station ultra-precision grinding machine with raceway as described in claim 1, characterized in that, The front side of the processing unit is independently provided with a horizontally arranged loading and unloading mechanism (100). The loading and unloading mechanism (100) includes a horizontally arranged conveyor chain plate (110) and two sets of loading and unloading components (120) corresponding to the processing units respectively. The side of the conveyor chain plate (110) is provided with two sets of baffle components and position control components. The baffle components include two baffle cylinders (111) arranged side by side. The baffle cylinders (111) are used to control a single bearing steel ring to pass through each time. The position control components include a moving table (112) independently set in front of the conveyor chain plate (110) and a position control cylinder (113). The top of the moving table (112) is equipped with a limit plate (114) that spans across the conveyor chain plate (110). A magnetic suction body (115) is installed on the side of the limit plate (114) facing the bearing steel ring. The piston rod of the position control cylinder (113) is installed on the moving table (112). The loading and unloading assembly (120) includes a longitudinal cylinder (121) independently set under the conveyor chain plate (110). The piston rod of the longitudinal cylinder (121) is equipped with a movable frame (122). The movable frame (122) is equipped with a loading and unloading plate (123). The loading and unloading plate (123) is located above the conveyor chain plate (110) and the limiting plate (114). The loading and unloading plate (123) is equipped with two notches arranged in front and behind and two notches arranged in the left and right. The bottom of the loading and unloading plate (123) is equipped with a baffle (124).

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