Multifunctional vertical double-station superfinishing grinding machine for raceway

Abstract

The invention belongs to the technical field of bearing machining, and particularly relates to a multifunctional vertical double-station superfinishing grinding machine for a raceway. A combined structure of an eccentric driving shaft and an eccentric sleeve is adopted by a driving part of a raceway grinding mechanism and a driving part of a flange grinding mechanism, so that reciprocating motion of a grinding piece (oilstone) is achieved; and the stroke of the oilstone can be adaptively adjusted by adjusting the angle staggering amount of the eccentric sleeve relative to the eccentric driving shaft, so that the machining operation of flanges and raceway surfaces with different widths is completed. And meanwhile, angle adjusting structures are arranged on the roller path grinding mechanism and the flange grinding mechanism to adaptively adjust the inclination angles of a flange grinding piece and a roller path surface grinding assembly relative to the bearing steel ring, so that the machining operation of the flange and the roller path surface of the bearing steel ring at different angles is realized.

Description

Technical Field

[0001] The present invention belongs to the technical field of bearing processing, and particularly relates to a multi-functional vertical double-station super-precision grinding machine for raceways. Background Art

[0002] A roller bearing includes an inner ring, an outer ring, and rollers between the inner and outer rings. During the processing of the roller bearing, it is necessary to grind the raceway surfaces of the inner and outer rings. When grinding the inner ring, it is also necessary to grind the rib on one side of the raceway surface. Traditional inner ring grinding requires two devices to perform processing operations on the rib and the raceway surface respectively, and two clamping operations are required, which will cause deviation of the reference and lead to the problem that the accuracy of the inner ring does not meet the standard.

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

[0004] 1. When the existing rib and raceway grinding equipment performs super-precision operation on the bearing inner ring, it does not have the function of adjusting the grinding angles of the rib and the raceway;

[0005] 2. When the existing rib and raceway grinding equipment performs super-precision operation on the bearing inner ring, it does not have the function of adjusting the grinding stroke amounts of the rib and the raceway;

[0006] 3. When the existing rib and raceway grinding equipment, especially for realizing vertical roughing, finishing and super-precision operations at double stations, lacks a loading and unloading device that can be used to better connect the double stations. Summary of the Invention

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

[0008] The problem that the existing integrated equipment for grinding the rib and raceway does not have the function of adjusting the angles of the rib and the raceway when performing super-precision operation on the bearing inner ring.

[0009] In order to solve the above technical problems, the inventors have obtained the technical solution of the present invention through practice and summary. The present invention adopts the following technical solution:

[0010] A multi-functional vertical double-station super-precision grinding machine for raceways, comprising two processing units, and each of the processing units includes:

[0011] A rib grinding mechanism, the rib grinding mechanism includes a transverse slide, a rib grinding seat is installed on the top of the transverse slide, and a rib grinding assembly is installed on the rib grinding seat through an angle adjustment structure;

[0012] A raceway grinding mechanism, the raceway grinding mechanism includes a raceway grinding slide, an adjustment frame is installed on the top of the raceway grinding slide, an adjustment component for adjusting the angle of the raceway grinding seat and a raceway grinding seat are installed on the adjustment frame, and a raceway grinding assembly is installed on the raceway grinding seat;

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

[0014] Preferably, the angle adjustment structure includes a worm and a worm gear installed on the rib grinding seat. The worm and the worm gear cooperate. A driving gear is installed on the rotating shaft of the worm gear. One end of the worm is provided with an operating rod. An arc-shaped rack meshing with the driving gear is installed on the rib grinding component. An arc-shaped notch is installed on the rib grinding seat, and a pressing bolt is installed in the arc-shaped notch. The pressing bolt is installed on the rib grinding component.

[0015] Preferably, the rib grinding component includes a grinding drive assembly one and a rib grinding assembly, and the raceway grinding component includes a grinding drive assembly two and a raceway grinding assembly;

[0016] Both the grinding drive assembly one and the grinding drive assembly two are fixed seats. A servo motor is installed on the fixed seat. The output end of the servo motor is installed with an eccentric drive shaft. One end of the eccentric drive shaft is rotatably installed on the fixed seat. An eccentric sleeve, an adjusting sleeve and a locking nut are installed on the eccentric drive shaft. A rolling body is installed on the outer side of the eccentric sleeve. The adjusting sleeve is axially slidably matched with the eccentric drive shaft and the side in contact with the eccentric sleeve is an annular tooth surface. The locking nut is used to squeeze 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 moving frame is sleeved on the outer side of the rolling body. The moving frame is slidably matched with the fixed seat. The moving frame is used to install the rib 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 moving frame. An elastic body is sleeved on the outer side of the guide body.

[0018] Preferably, the rib grinding assembly includes a mounting plate installed on the moving frame through a rotating shaft. An angle adjustment groove is provided on the moving frame. The mounting plate is restricted from relative movement with respect to the moving frame by a locking bolt in the angle adjustment groove. An adjustment screw is rotatably installed on the moving frame. The adjustment screw is used to adjust the angle of the mounting plate relative to the moving frame. The mounting plate is used to install the rib grinding piece.

[0019] Preferably, the adjustment component includes an operating shaft, a worm shaft and a worm gear seat. The operating shaft forms a transmission cooperation with the worm shaft through gear transmission. The worm shaft and the worm gear seat form a transmission cooperation. The worm gear seat is rotatably installed on the adjustment frame and fixed on the raceway grinding seat.

[0020] Preferably, the pressing-down assembly includes an upright frame, with downward-sliding plates arranged vertically on both sides of the upright frame. A downward-pressing cylinder is installed on the top of the downward-sliding plate. The piston end of the downward-pressing cylinder is connected to the downward-sliding plate. A downward-pressing member is installed on the downward-sliding plate. At the bottom of the downward-pressing member, there is an insertion body inserted into the inner part of the bearing steel ring and a downward-pressing rolling body pressed against the top surface of the bearing steel ring.

[0021] Preferably, a rear positioning arc-shaped seat is independently arranged at the rear side of the servo-electric drive main shaft. The center of the rear positioning arc-shaped seat is on the axis of the servo-electric drive main shaft. Two radially arranged adjusting support rollers are installed on the rear positioning arc-shaped seat.

[0022] The servo-electric drive main shaft includes a drive main shaft, a drive disk, and a top disk installed on the top of the drive disk through a spring member.

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

[0024] The loading and unloading mechanism includes a horizontally arranged conveying chain plate and two sets of loading and unloading components corresponding to the processing unit respectively. Two sets of material blocking components and a position control component are arranged at the side of the conveying chain plate. The material blocking component includes two material blocking cylinders arranged side by side. The material blocking cylinder is used to control the passage of a single bearing steel ring each time. The position control component includes a moving table and a position control cylinder independently arranged at the front side of the conveying chain plate. A limiting plate spanning across the conveying chain plate is installed on the top of the moving table. A magnetic body is installed on one side of the limiting 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 component includes a longitudinal cylinder independently arranged below the conveying chain plate. The piston rod of the longitudinal cylinder is installed with a moving frame. An upper and lower loading plate is installed on the moving frame. The upper and lower loading plate is located above the conveying chain plate and the limiting plate. Two notches one arranged front and back and two notches two arranged left and right are installed on the upper and lower loading plate. A retaining bar is installed at the bottom of the upper and lower loading plate.

[0026] Preferably, an installation groove is arranged at the bottom of the retaining bar. 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. An arc-shaped guide groove centered on the rotation node of the clamping claw is arranged at the side of the installation groove. The depth of the arc-shaped guide groove first decreases and then increases from top to bottom. A limiting recess is arranged at the lower end of the arc-shaped guide groove. An elastic pin is installed on the side of the clamping claw and is slidably matched in the arc-shaped guide groove.

[0027] A sunken groove is arranged at the bottom of the upper and lower loading plate. A lifting top plate is installed in the sunken groove through an elastic member. A connecting rope is installed at the bottom of the lifting top plate. The free end of the connecting rope passes through the retaining bar and enters the installation groove and is connected to the clamping claw.

[0028] Inside the installation groove, a pulling body that slides back and forth is installed. One end of the pulling body is exposed outside the installation groove, and the other end is connected to a pulling rope. The pulling rope is connected to the clamping claw. An internal wedge surface is provided on the pulling body located outside the installation groove.

[0029] A vertical rod is installed on the limiting plate, and a horizontal member is installed at the top of the vertical rod. A wedge body is provided on one side of the horizontal member relative to the retaining bar and corresponds to the internal wedge surface in the horizontal position.

[0030] The bottom of the lifting top plate is inclined downward on the side far from the bearing steel ring.

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

[0032] 1. The present invention uses one-time clamping to complete the processing operations of the rib and raceway surface of the inner ring. The pressing component at the top presses the rolling elements (self-aligning bearings) to press the inner ring onto the servo electric drive spindle. The inner ring is driven to rotate by the servo electric drive spindle. While rotating, the rib grinding mechanism grinds the rib on the left side, and the raceway grinding mechanism grinds the raceway surface on the right side, finally completing the rough and finish grinding processing operations. The driving parts of the raceway grinding mechanism and the rib grinding mechanism adopt a combined structure of an eccentric drive shaft and an eccentric sleeve to realize the reciprocating movement of the grinding parts (oil stones). When the widths of the rib and the raceway surface are different, the stroke of the oil stone can also be adaptively adjusted by adjusting the angular offset of the eccentric sleeve relative to the eccentric drive shaft, thereby completing the processing operations of ribs and raceway surfaces with different widths. At the same time, compared with the traditional swing arm transmission method, the overall vibration inertia can be reduced. An elastic body is provided between the moving frame and the fixed seat to ensure that the moving frame and the rolling elements are always in close contact, reducing their vibration and the inertia at the commutation poles. The friction between the two can be effectively reduced through the rolling elements (bearings). At the same time, angle adjustment structures are provided on both the raceway grinding mechanism and the rib grinding mechanism to adaptively adjust the inclination angles of the rib grinding parts and the raceway surface grinding components relative to the bearing steel ring, so as to complete the processing operations of the rib and raceway surface of the bearing steel ring at different angles.

[0033] 2. The present invention sleeved a rolling body (bearing) outside the eccentric sleeve, and uses the rolling body to drive the corresponding structure to realize the reciprocating movement. Cooperating with the spring parts to ensure that the outer peripheral surface of the bearing and the corresponding structure are always in close contact without abnormal noise and vibration, ensuring the quality and precision of the grinding surface.

[0034] 3. The present invention uses a double-station to realize rough and finish grinding vertical processing, and the feeding and discharging mechanism is used to realize better connection operation between the two stations, thereby making the structure more compact.

[0035] 4. The present invention also makes targeted improvements to the conveying mechanism. Instead of using a loading and unloading track in combination with a transfer manipulator to achieve loading and unloading, it uses a conveying chain plate and a loading and unloading plate that reciprocates longitudinally to complete the loading and unloading actions of the inner ring, and then completes the conveying of the inner ring and the loading and unloading actions of freely switching between the conveying chain plate and the processing station. By realizing the connection in a simpler way, the equipment space is also rationally arranged.

[0036] 5. When the loading and unloading plate of the present invention feeds the bearing steel ring to the processing station, since the adjusting support roller is located below the loading and unloading plate, it is impossible to ensure that the bearing steel ring is exactly horizontally conveyed to the processing station. That is, when the bearing steel ring is at the processing station, on the one hand, the bottom side wall of the bearing steel ring cannot effectively fit on the adjusting support roller; on the other hand, the top side wall of the bearing steel ring excessively presses the side wall of the front baffle, resulting in eccentricity during the grinding operation, which in turn causes coaxiality problems with the rib, raceway surface, and inner diameter. Or, the side wall of the baffle applies resistance to the top of the bearing steel ring, causing horizontal eccentric swing during the rotation of the bearing steel ring, thereby affecting the processing accuracy of the bearing steel ring. Therefore, the present invention sets clamping claws arranged in the front-back direction on the baffle. By using the actions of the clamping claws to release the bearing steel ring, clamp, and lift the bearing steel ring under different working conditions, after feeding to the processing station, due to the downward pressure of the upper rolling body on the top of the bearing steel ring, the lower top plate will sink a certain distance (compressing the spring member) at the same time, causing the clamping claws to disengage from the lower side wall of the top rib. The clamping claws will be driven to the limiting recess and restricted by the elastic pin to achieve separation from the bearing steel ring, thereby releasing the acting force to solve the eccentricity problem caused by the resistance during grinding. When each processing is completed, with the release of the acting force of the downward pressure rolling body, the lower top plate under the action of the spring member will act on the bearing steel ring to be clamped again by the clamping claws, and then be sent back above the conveying chain plate by the loading and unloading plate. By using the wedge-shaped body of the transverse horizontal rod on the limiting plate to act on the pulling body, the clamping claws are opened again, thereby releasing the processed bearing steel ring, and the processed bearing steel ring is moved out from between the two baffles under the action of the limiting plate. The new bearing steel ring enters between the two baffles, and the top of the bearing steel ring acts on the lifting top plate through the pulling of the magnetic attracting body to complete the clamping and lifting. The processed bearing steel ring is conveyed by the conveying member to the next station. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0039] Figure 3 is a position distribution diagram of the rib grinding mechanism, raceway grinding mechanism, and servo motor-driven main shaft of the present invention;

[0040] Figure 4Schematic diagram of the overall structure of the rib grinding mechanism of the present invention;

[0041] Figure 5 、 Figure 6 Schematic diagrams of the rib grinding assembly of the present invention from two perspectives;

[0042] Figure 7 Schematic diagram of the overall structure of the raceway grinding mechanism of the present invention;

[0043] Figure 8 Schematic diagram of the structure on the fixed seat of the present invention;

[0044] Figure 9 is Figure 8 front view of;

[0045] Figure 10 is Figure 9 sectional view taken along line A - A in;

[0046] Figure 11 Schematic diagram of the overall structure of the pressing - down assembly of the present invention;

[0047] Figure 12 Schematic diagram of the overall structure of the loading and unloading mechanism of the present invention;

[0048] Figure 13 Structural diagram of the rear - mounted positioning arc seat of the present invention;

[0049] Figure 14 、 Figure 15 Structural diagrams of the loading and unloading assembly of the present invention from two different perspectives;

[0050] Figure 16 Front and rear sectional views when the clamping jaws of the present invention clamp the bearing steel ring;

[0051] Figure 17 is Figure 16 local enlarged view at position A in;

[0052] Figure 18 is Figure 17 state diagram when the clamping jaws release the bearing steel ring in;

[0053] Figure 19 Side view of the clamping jaws;

[0054] Figure 20 Overall structural diagram of the lifting top plate;

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

[0056] Figure 22 Connection relationship diagram of the driving main shaft and the driving disc.

[0057] In the figure:

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

[0059] 200. Flange grinding mechanism; 210. Horizontal slide; 220. Flange grinding seat; 230. Flange grinding assembly; 231. Flange grinding assembly; 232. Fixed seat; 233. Servo motor; 234. Eccentric drive shaft; 235. Eccentric sleeve; 236. Adjusting sleeve; 237. Locking nut; 238. Rolling body; 239. Moving frame; 2310. Guide body; 2311. Mounting plate; 2312. Angle adjustment groove; 2313. Locking bolt; 2314. Adjusting screw; 2315. Elastic body; 2316. Flange grinding member; 240. Angle adjustment structure; 241. Operating rod; 242. Driving gear; 243. Arc rack; 244. Arc notch; 245. Compression 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-down assembly; 410. Upright frame; 420. Pressing-down slide plate; 430. Pressing-down cylinder; 440. Pressing-down member; 441. Socket body; 442. Pressing-down rolling body;

[0062] 500. Servo motor-driven main shaft; 501. Rear positioning arc seat; 502. Adjusting support roller; 503. Driving main shaft; 504. Driving disc; 505. Spring member; 506. Top disc. Detailed implementation manners

[0063] As Figure 1 、 2 、3, 4, 7, 11 show, the multifunctional raceway vertical double-station super-precision grinding machine includes two processing units symmetrically distributed horizontally, and each of the said processing units includes:

[0064] The rib grinding mechanism 200, the rib grinding mechanism 200 includes a transverse slide 210, a rib grinding seat 220 is installed on the top of the transverse slide 210, and a rib grinding assembly 230 is installed on the rib grinding seat 220 through an angle adjustment structure 240. The inclination angle of the rib grinding processing surface is adjusted through the angle adjustment structure 240, and the transverse slide 210 is used to adjust the transverse position of the rib grinding seat 220 to approach or move away from the bearing steel ring.

[0065] The raceway grinding mechanism 300, the raceway grinding mechanism 300 includes a raceway grinding slide 310, an adjustment frame 320 is installed on the top of the raceway grinding slide 310, a raceway grinding seat 330 and an adjustment component 340 for adjusting the angle of the raceway grinding seat 330 are installed on the adjustment frame 320, and a raceway grinding assembly 350 is installed on the raceway grinding seat 330; the raceway grinding slide 310 is used to horizontally adjust the position of the adjustment frame 320 to approach or move away from the bearing steel ring, and the adjustment component 340 is used to adjust the inclination angle of the raceway grinding seat 330 relative to the bearing steel ring, so as to realize the grinding operation of raceway surfaces at different angles.

[0066] The servo electric drive mechanism, the servo electric drive mechanism includes a servo electric drive main shaft 500 located in the area below the grinding station and a pressing component 400 located in the area above the grinding station, and the pressing component 400 is used to press on the top end surface of the bearing steel ring. The pressing component 400 presses the bearing steel ring on the servo electric drive main shaft 500 and drives it to rotate at high speed through the servo electric drive main shaft 500, and then the rib grinding mechanism 200 and the raceway grinding mechanism 300 respectively perform processing operations on it.

[0067] On the basis of the above solution, the angle adjustment structure 240 includes a worm and a worm gear installed on the rib grinding seat 220, the worm and the worm gear cooperate, a driving gear 242 is installed on the rotating shaft of the worm gear, an operating rod 241 is arranged at one end of the worm, an arc-shaped rack 243 meshing with the driving gear 242 is installed on the rib grinding assembly 230, an arc-shaped notch 244 is installed on the rib grinding seat 220, and a pressing bolt 245 is installed in the arc-shaped notch 244, and the pressing bolt 245 is installed on the rib grinding assembly 230. By rotating the operating rod 241, the arc-shaped rack 243 is driven to rotate a certain angle through the driving gear 242. Due to the self-locking of the worm and the worm gear, it can remain relatively stable after the angle is adjusted. After adjusting the angle, in order to ensure the stability of the rib grinding assembly 230 relative to the rib grinding seat 220, the position and angle limiting operations are completed through the pressing bolt 245.

[0068] On the basis of the above solution, as Figures 3 to 7 shown, the rib grinding assembly 230 includes a grinding drive assembly one and a rib grinding assembly 231, and the raceway grinding assembly 350 includes a grinding drive assembly two and a raceway grinding assembly 351;

[0069] As Figures 8 to 10 shown, both the grinding drive assembly one and the grinding drive assembly two are fixed to the fixed seat 232. A servo motor 233 is installed on the fixed seat 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 seat 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 slidably engaged with the eccentric drive shaft 234 and the side in contact with the eccentric sleeve 235 is an annular tooth surface. The locking nut 237 is used to squeeze the adjusting sleeve 236 so that one end of the eccentric sleeve 235 and the adjusting sleeve 236 are in contact and remain relatively stationary;

[0070] A moving frame 239 is sleeved on the outer side of the rolling element 238. The moving frame 239 is slidably engaged with the fixed seat 232. The moving 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 moving frame 239. An elastic body 2315 is sleeved on the outer side of the guide body 2310.

[0071] Since it is necessary to adjust the stroke of the moving frame 239 when machining edges and raceway surfaces of different widths, first unlock the locking nut 237 to release the squeezing force on the adjusting sleeve 236. The adjusting sleeve 236 axially slides relative to the eccentric drive shaft 234 for adjustment, adjusts the angle of the eccentric sleeve 235 relative to the eccentric drive shaft 234 by a certain amount, then restricts the angle of the eccentric sleeve 235 through the annular tooth surface by the adjusting sleeve 236, and finally presses and fixes it with the locking nut 237, thereby completing the adjustment of the eccentricity and finally completing the adjustment of the stroke.

[0072] On the basis of the above solution, as Figure 4 and Figure 5 shown, the edge grinding assembly 231 includes a mounting plate 2311 installed on the moving frame 239 through a rotating shaft. Angle adjustment grooves 2312 are provided on the moving frame 239. The mounting plate 2311 is restricted from rotating relative to the moving frame 239 by locking bolts 2313 in the angle adjustment grooves 2312. An adjusting screw 2314 is rotatably installed on the moving frame 239. The adjusting screw 2314 is used to adjust the angle of the mounting plate 2311 relative to the moving frame 239. The mounting plate 2311 is used to install the edge grinding part 2316. Loosen the locking bolts 2313, then adjust the position and angle of the mounting plate 2311 through the adjusting screw 2314. After rotating the edge grinding part 2316 by a certain angle with the rotating shaft as the center and adjusting by a certain angle, then lock and fix it with the locking bolts 2313.

[0073] On the basis of the above solution, as Figure 7As shown, the adjusting assembly 340 includes an operating shaft 341, a worm shaft 342, and a worm gear seat 343. The operating shaft 341 is in transmission cooperation with the worm shaft 342 through gear transmission. The worm shaft 342 is in transmission cooperation with the worm gear seat 343. The worm gear seat 343 is rotatably installed on the adjusting frame 320 and fixed on 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 through the operating shaft 341 via gears and the worm shaft 342.

[0074] Based on the above solution, as Figure 11 shown, the pressing-down assembly 400 includes an upright frame 410. Pressing-down sliding plates 420 arranged vertically are installed on both sides of the upright frame 410. A pressing-down cylinder 430 is installed on the top of the pressing-down sliding plate 420. The piston end of the pressing-down cylinder 430 and the pressing-down sliding plate 420 are provided with a pressing-down member 440 on the pressing-down sliding plate 420. A socket body 441 inserted into the inner part of the bearing steel ring and a pressing-down rolling body 442 (self-aligning bearing) pressing on the top surface of the bearing steel ring are arranged at the bottom of the pressing-down member 440. The bearing steel ring is pressed against the top surface of the top plate 506 of the servo electric drive spindle 500 through the pressing-down rolling body 442 by driving the pressing-down sliding plate 420 and the pressing-down member 440 downward by the pressing-down cylinder 430.

[0075] Based on the above solution, as Figure 13 shown, a rear positioning arc-shaped seat 501 is independently arranged at 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 adjusting support rollers 502 arranged radially are installed on the rear positioning arc-shaped seat 501.

[0076] As Figure 22 shown, the servo electric drive spindle 500 includes a driving spindle 503, a driving disk 504, and a top plate 506 installed on the top of the driving disk 504 through a spring member 505. The driving spindle 503 drives the driving disk 504 to rotate. The top plate 506 axially slides relative to the driving disk 504 through the spring member 505, and a certain amount of downward movement of the bearing steel ring is achieved under the extrusion of the pressing-down rolling body 442.

[0077] Based on the above solution, as Figure 1 shown, a loading and unloading mechanism 100 arranged horizontally is independently arranged at the front side of the processing unit; the loading and unloading mechanism 100 is used to realize the connection of two vertical processing units.

[0078] As Figure 12As shown in the figure, the loading and unloading mechanism 100 includes a horizontally arranged conveying chain plate 110 and two sets of loading and unloading components 120 corresponding to the processing units respectively. Two sets of material blocking components and position control components are arranged on the side of the conveying chain plate 110. The material blocking component includes two material blocking cylinders 111 arranged side by side, and the material blocking cylinder 111 is used to control the passage of a single bearing steel ring each time.

[0079] As Figure 21 shown in the figure, the position control component includes a moving table 112 and a position control cylinder 113 independently arranged on the front side of the conveying chain plate 110. A limiting plate 114 straddling the conveying chain plate 110 is installed on the top of the moving table 112. A magnetic attraction body 115 is installed on the side of the limiting plate 114 facing the bearing steel ring. When the magnetic attraction body 115 moves horizontally, it can drive the effective synchronous movement of the bearing steel ring, and at the same time can also squeeze the lifting top plate 1232 to move upward. The piston rod of the position control cylinder 113 is installed on the moving table 112, and the position control cylinder 113 is used to move the limiting plate 114 horizontally. When a single bearing steel ring conveyed by the material blocking cylinder 111 is adsorbed by the magnetic attraction body 115, the magnetic attraction body 115 is used to synchronously move the bearing steel ring until the front and rear positions of the bearing steel ring and the processing station coincide, and it also enters between the two retaining bars 124.

[0080] As Figure 14 and 15 shown in the figure, the loading and unloading component 120 includes a longitudinal cylinder 121 independently arranged below the conveying chain plate 110. A moving frame 122 is installed on the piston rod of the longitudinal cylinder 121, and a loading and unloading plate 123 is installed on the moving frame 122. The loading and unloading plate 123 is located above the conveying chain plate 110 and the limiting plate 114. Two notches one arranged front and rear and two notches two arranged left and right are installed on the loading and unloading plate 123. A retaining bar 124 is installed at the bottom of the loading and unloading plate 123. After the bearing steel ring enters between the two retaining bars 124, the longitudinal cylinder 121 is used to move the bearing steel ring forward and backward through the moving frame 122, and then the bearing steel ring is loaded onto the top plate 506 through the loading and unloading plate 123. After the pressing rolling body 442 presses down the bearing steel ring, the bearing steel ring can be separated from the retaining bar 124.

[0081] On the basis of the above solution, when the loading and unloading plate loads the bearing steel ring onto the processing station, since the adjusting support roller is located below the loading and unloading plate, it is impossible to ensure that the bearing steel ring is exactly horizontally conveyed to the processing station, that is, when the bearing steel ring is at the processing station, on the one hand, the bottom side wall of the bearing steel ring cannot effectively fit on the adjusting support roller; on the other hand, the top side wall of the bearing steel ring excessively presses the side wall of the front retaining bar, resulting in eccentricity during the grinding operation, which in turn causes coaxiality problems with the rib, raceway surface and inner diameter, or the side wall of the retaining bar applies resistance to the top of the bearing steel ring, causing horizontal eccentric swing during the rotation of the bearing steel ring, which in turn affects the processing accuracy of the bearing steel ring. Therefore, the following improvements are made:

[0082] As shown in Figures 16 - 18 Figure, an installation groove 1241 is provided at the bottom of the retaining bar 124. A clamping jaw 1242 is rotatably installed in the installation groove 1241. One end of the clamping jaw 1242 contacts the top edge of the bearing steel ring. An arc-shaped guide groove 1243 centered on the rotation node of the clamping jaw 1242 is provided on the side of the installation groove 1241. The depth of the arc-shaped guide groove 1243 first decreases and then increases from top to bottom. A limiting recess 1244 is provided at the lower end of the arc-shaped guide groove 1243. An elastic pin 1245 is installed on the side of the clamping jaw 1242, and the elastic pin 1245 is slidably fitted in the arc-shaped guide groove 1243;

[0083] A sunken groove is provided at the bottom of the loading and unloading plate 123. A lifting top plate 1232 is installed in the sunken groove through an elastic member 1231. A connecting rope 1233 is installed at the bottom of the lifting top plate 1232. The free end of the connecting rope 1233 penetrates through the retaining bar 124 and enters the installation groove 1241 and then is connected to the clamping jaw 1242;

[0084] A pulling body 1246 that slides back and forth is installed inside the installation groove 1241. One end of the pulling body 1246 is exposed outside the installation groove 1241, and the other end is connected to a pulling rope 1247. The pulling rope 1247 is connected to the clamping jaw 1242. An internal wedge surface is provided on the pulling body 1246 located outside the installation groove 1241;

[0085] A vertical rod 1141 is installed on the limiting plate 114. A horizontal member 1142 is installed at the top of the vertical rod 1141. A wedge body 1143 is provided on one side of the horizontal member 1142 opposite to the retaining bar 124 and corresponds to the internal wedge surface in the horizontal position;

[0086] The bottom of the lifting top plate 1232 is inclined downward on the side away from the bearing steel ring.

[0087] When the limit plate 114 moves horizontally, the built-in wedge surface is first actuated by the wedge body 1143 to move the pulling body 1246 outwards. Through the pulling rope 1247, the clamping claws 1242 are rotated downwards, and then the processed bearing steel ring between the two retaining bars 124 is lowered and falls onto the conveying chain plate 110. Then, the limit plate 114 moves horizontally out of the right side of the retaining bar 124. At the same time, the magnetic attraction body 115 on the left drives the bearing steel ring to move horizontally. The bearing steel ring will squeeze the position at the bottom of the lifting top plate 1232 that slopes downwards, causing the lifting top plate 1232 to move upwards and compress the elastic member 1231. At the same time, through the connecting rope 1233, the clamping claws 1242 move upwards. First, the elastic pin 1245 disengages from the limit recess 1244 and passes through the position with the minimum depth of the arc-shaped guide groove 1243. Then, the elastic pin 1245 will cooperate with the depth structure of the arc-shaped guide groove 1243 to complete the automatic upward movement of the clamping claws 1242 until the upper edge of the bearing steel ring is clamped, and the bearing steel ring is lifted to a certain height to disengage from the conveying chain plate 110 until the top surface fits against the bottom surface of the loading and unloading plate 123. Finally, the clamping claws 1242 clamp the bearing steel ring front and back.

[0088] The loading and unloading plate 123 moves backward and feeds the bearing steel ring onto the top of the top plate 506 with the side surface fitting against the adjusting support roller 502. The pressing roller 442 presses down on the top surface of the bearing steel ring. As the bearing steel ring moves downward, the clamping claws 1242 are rotated downward. When the elastic pin 1245 moves downward through the minimum depth of the arc-shaped guide groove 1243, the elastic pin 1245 will continue to move downward in cooperation with the depth change of the arc-shaped guide groove 1243 until the clamping claws 1242 are separated from the upper edge of the bearing steel ring. During this process, the top plate 506 moves downward to compress the spring member 505, and the top surface of the bearing steel ring also separates from the lifting top plate 1232. The processing of the edge and raceway surface is carried out. After the processing is completed, the pressing force of the pressing roller 442 is released, and the spring member 505 moves the top plate 506 and the bearing steel ring upward until the top surface of the bearing steel ring acts on the lifting top plate 1232 to move upward. Through the connecting rope 1233, the clamping claws 1242 move upward until the elastic pin 1245 passes through the position with the minimum depth of the arc-shaped guide groove 1243. The clamping claws 1242 will continue to move upward to re-clamp the bearing steel ring and make the top surface fit against the bottom surface of the loading and unloading plate 123. The loading and unloading plate 123 conveys the bearing steel ring forward until it returns above the conveying chain plate 110 again.

Claims

1. Multifunctional raceway vertical double-station super-precision grinding machine, including two processing units, characterized in that, Each of the said processing units includes: A rib grinding mechanism (200), the rib grinding mechanism (200) includes a transverse slide (210), a rib grinding seat (220) is installed on the top of the transverse slide (210), and a rib grinding assembly (230) is installed on the rib grinding seat (220) through an angle adjustment structure (240); A raceway grinding mechanism (300), the raceway grinding mechanism (300) includes a raceway grinding slide (310), an adjustment frame (320) is installed on the top of the raceway grinding slide (310), a raceway grinding seat (330) and an adjustment component (340) for adjusting the angle of the raceway grinding seat (330) are installed on the adjustment frame (320), and a raceway grinding assembly (350) is installed on the raceway grinding seat (330); A servo electric drive mechanism, the servo electric drive mechanism includes a servo electric drive main shaft (500) located in the area below the grinding station and a pressing component (400) located in the area above the grinding station, and the pressing component (400) is used for pressing on the top end face of the bearing steel ring.

2. The multi-functional raceway vertical double-station super-precision grinding machine according to claim 1, wherein The said angle adjustment structure (240) includes a worm and a worm gear installed on the rib grinding seat (220), the worm and the worm gear cooperate, a driving gear (242) is installed on the rotating shaft of the worm gear, an operating rod (241) is arranged at one end of the worm, an arc-shaped rack (243) meshing with the driving gear (242) is installed on the rib grinding assembly (230), an arc-shaped notch (244) is installed on the rib grinding seat (220), and a pressing bolt (245) is installed in the arc-shaped notch (244), and the pressing bolt (245) is installed on the rib grinding assembly (230).

3. The multi-functional raceway vertical double-station super-precision grinding machine according to claim 1, characterized in that, The said rib grinding assembly (230) includes a grinding drive assembly one and a rib grinding assembly (231), and the raceway grinding assembly (350) includes a grinding drive assembly two and a raceway grinding assembly (351); Both the grinding drive assembly one and the grinding drive assembly two are fixed seats (232), a servo motor (233) is installed on the fixed seat (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 seat (232), an eccentric sleeve (235), an adjustment sleeve (236) and a locking nut (237) are installed on the eccentric drive shaft (234), a rolling body (238) is installed on the outer side of the eccentric sleeve (235), the adjustment sleeve (236) is axially slidably matched with the eccentric drive shaft (234) and the side in contact with the eccentric sleeve (235) is an annular tooth surface, and the locking nut (237) is used for squeezing the adjustment sleeve (236) so that the corresponding ends of the eccentric sleeve (235) and the adjustment sleeve (236) are in contact and remain relatively stationary; A moving frame (239) is sleeved on the outer side of the rolling element (238). The moving frame (239) is slidably fitted on the fixed seat (232). The moving frame (239) is used to mount the rib grinding assembly (231) or the raceway grinding assembly (351). A guiding body (2310) is mounted on the fixed seat (232), and one end of the guiding body (2310) is inserted into the moving frame (239). An elastic body (2315) is sleeved on the outer side of the guiding body (2310).

4. The multi-functional raceway vertical double-station super-precision grinding machine according to claim 3, characterized in that, The rib grinding assembly (231) includes a mounting plate (2311) mounted on the moving frame (239) through a rotating shaft. An angle adjustment slot (2312) is provided on the moving frame (239). The mounting plate (2311) is restricted from rotating relative to the moving frame (239) by a locking bolt (2313) in the angle adjustment slot (2312). An adjustment screw rod (2314) is rotatably mounted on the moving frame (239). The adjustment screw rod (2314) is used to adjust the angle of the mounting plate (2311) relative to the moving frame (239). The mounting plate (2311) is used to mount the rib grinding member (2316).

5. The multi-functional raceway vertical double-station super-precision grinding machine according to claim 1, characterized in that, The adjusting assembly (340) includes an operating shaft (341), a worm shaft (342) and a worm gear seat (343). The operating shaft (341) is in driving cooperation with the worm shaft (342) through gear transmission. The worm shaft (342) is in driving cooperation with the worm gear seat (343). The worm gear seat (343) is rotatably mounted on the adjusting frame (320) and fixed on the raceway grinding seat (330).

6. The multi-functional raceway vertical double-station super-precision grinding machine according to claim 1, characterized in that, The downward pressing assembly (400) includes a vertical frame (410). Downward pressing sliding plates (420) arranged vertically are mounted on both sides of the vertical frame (410). A downward pressing cylinder (430) is mounted on the top of the downward pressing sliding plate (420). The piston end of the downward pressing cylinder (430) is connected to the downward pressing sliding plate (420). A downward pressing member (440) is mounted on the downward pressing sliding plate (420). The bottom of the downward pressing member (440) is provided with an inserting body (441) inserted into the inner part of the bearing steel ring and a downward pressing rolling element (442) pressed against the top surface of the bearing steel ring.

7. The multi-functional raceway vertical double-station super-precision grinding machine according to claim 1, characterized in that, A rear positioning arc seat (501) is independently arranged at the rear side of the servo electric drive main shaft (500). The center of the rear positioning arc seat (501) is on the axis of the servo electric drive main shaft (500). Two adjusting support rollers (502) arranged radially are mounted on the rear positioning arc seat (501). The servo electric drive main shaft (500) includes a driving main shaft (503), a driving disk (504) and a top disk (506) mounted on the top of the driving disk (504) through a spring member (505).

8. The multi-functional raceway vertical double-station super-precision grinding machine according to claim 1, wherein, A loading and unloading mechanism (100) arranged horizontally is independently arranged at the front side of the processing unit. The loading and unloading mechanism (100) includes a horizontally arranged conveying chain plate (110) and two sets of loading and unloading components (120) corresponding to the processing units respectively. On the side of the conveying chain plate (110), there are two sets of material blocking components and position control components. The material blocking component includes two material blocking cylinders (111) arranged side by side, and the material blocking cylinder (111) is used to control the passage of a single bearing steel ring each time. The position control component includes a moving table (112) and a position control cylinder (113) independently arranged on the front side of the conveying chain plate (110). On the top of the moving table (112), a limiting plate (114) spanning across the conveying chain plate (110) is installed. On the side of the limiting plate (114) facing the bearing steel ring, a magnetic attraction body (115) is installed. The piston rod of the position control cylinder (113) is installed on the moving table (112); The loading and unloading component (120) includes a longitudinal cylinder (121) independently arranged below the conveying chain plate (110). A moving frame (122) is installed on the piston rod of the longitudinal cylinder (121). An loading and unloading plate (123) is installed on the moving frame (122). The loading and unloading plate (123) is located above the conveying chain plate (110) and the limiting plate (114). On the loading and unloading plate (123), there are two notches one arranged front and back and two notches two arranged left and right. A retaining strip (124) is installed at the bottom of the loading and unloading plate (123).

9. The multi-functional raceway vertical double-station super-precision grinding machine according to claim 8, wherein, An installation groove (1241) is arranged at the bottom of the retaining strip (124). A clamping claw (1242) is rotatably installed in the installation groove (1241). One end of the clamping claw (1242) contacts the top edge of the bearing steel ring. On the side of the installation groove (1241), an arc-shaped guide groove (1243) centered on the rotation node of the clamping claw (1242) is arranged. The depth of the arc-shaped guide groove (1243) first decreases and then increases from top to bottom. A limiting recess (1244) is arranged at the lower end of the arc-shaped guide groove (1243). An elastic pin (1245) is installed on the side of the clamping claw (1242), and the elastic pin (1245) is slidably fitted in the arc-shaped guide groove (1243); A sunken groove is arranged at the bottom of the loading and unloading plate (123). A lifting top plate (1232) is installed in the sunken groove through an elastic member (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 retaining strip (124) and enters the installation groove (1241) and then is connected to the clamping claw (1242); A pulling body (1246) that slides back and forth is installed inside the installation groove (1241). One end of the pulling body (1246) is exposed outside the installation groove (1241), and the other end is connected with a pulling rope (1247). The pulling rope (1247) is connected to the clamping claw (1242). An internal wedge surface is arranged on the pulling body (1246) located outside the installation groove (1241); A vertical rod (1141) is installed on the limit plate (114), and a transverse horizontal member (1142) is installed at the top of the vertical rod (1141). A wedge-shaped body (1143) is provided on one side of the transverse horizontal member (1142) relative to the stop bar (124) and corresponds to the transverse position of the built-in wedge surface. The bottom of the lifting top plate (1232) is inclined downward on the side far from the bearing steel ring.

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