Four-row cylindrical bearing raceway grinding machining device and method

Abstract

The invention relates to the technical field of grinding machining, and particularly discloses a four-row cylindrical bearing raceway grinding machining device and method.The four-row cylindrical bearing raceway grinding machining device comprises a loading unit, a grinding unit and a grinding unit, the loading unit comprises a rotary table, a flexible clamping piece matched with a bearing outer ring is arranged on the rotary table, and a concave part is arranged in the flexible clamping piece; the grinding unit comprises a grinding motor, the output end of the grinding motor is connected with a rotating shaft, a grinding disc is arranged at the lower end of the rotating shaft, and a multidirectional dynamic cooling piece is arranged on the lower end face of the lifting air cylinder. Uniform clamping force is applied to the outer wall of the bearing outer ring through the flexible clamping piece, clamping stress is restrained, clamping deformation is small, and microscopic cracks caused by stress concentration are avoided. The multidirectional dynamic cooling piece integrates axial injection and radial injection, thermal damage is blocked, the temperature rise of a grinding area is effectively reduced, and the risk of surface burn is eliminated; the high-pressure cooling liquid scours a grinding interface in a turbulent flow mode, and microscopic cracks caused by secondary extrusion of abrasive particles are avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of grinding machining, and more specifically, it relates to a four-row cylindrical bearing raceway grinding machining device and method. Background Art

[0002] A four-row cylindrical bearing arranges four rows of cylindrical rollers side by side within the same bearing assembly, mainly used to bear overweight radial loads. By sharing the loads with multiple rows of rollers, the bearing capacity and rigidity are improved; the raceway is a groove machined on the outer surface of the inner ring of the bearing and the inner surface of the outer ring of the bearing, used to define the rolling track of the rollers in the circumferential direction and bear the radial loads exerted by the rollers; During the existing four-row cylindrical bearing raceway grinding process, there are problems of burning and microcracks during raceway grinding; in the traditional grinding machining device during the grinding process, the supply method of the coolant is relatively single, usually only providing coolant spraying in a single flow direction, unable to fully cover the grinding contact area, resulting in an increase in the temperature at the grinding points, and easily generating defects such as burning and microcracks; in addition, the existing clamping methods are mostly rigid clamping, and the clamping force applied to the outer ring of the bearing is uneven, easily causing stress concentration, resulting in a large amount of clamping deformation. Stress concentration will not only cause microcracks but also affect the coaxiality of the outer ring of the bearing, thereby affecting the machining accuracy of the raceway. Summary of the Invention

[0003] In order to overcome the above technical problems, the present invention proposes a four-row cylindrical bearing raceway grinding machining device and method.

[0004] The purpose of the present invention can be achieved through the following technical solutions: A four-row cylindrical bearing raceway grinding machining device for grinding the inner wall of the outer ring of the bearing, comprising: A frame; A loading unit, which includes a feed electric cylinder horizontally fixed on the frame and a feed slide table connected to the output end of the feed electric cylinder. A rotary motor is vertically installed on the feed slide table, a turntable is installed at the output end of the rotary motor, and a flexible clamping member adapted to the outer ring of the bearing is provided on the turntable. A recess for accommodating the outer ring of the bearing is provided inside the flexible clamping member; A grinding unit, which includes a bracket fixed on the frame, a vertical slide rail vertically installed on the bracket, and a lifting table slidably connected to the vertical slide rail. A lifting cylinder is connected between the bracket and the lifting table. A grinding motor is vertically installed on the lifting table, a rotating shaft is connected to the output end of the grinding motor, a grinding disc is provided at the lower end of the rotating shaft, and a multi-directional dynamic cooling member adapted to the grinding disc is provided on the lower end surface of the lifting cylinder; The multi-directional dynamic cooling member includes a sealed chamber fixed to the lower end face of the lifting table. One side of the top of the sealed chamber is communicated with a liquid inlet pipe, and the bottom of the sealed chamber is communicated with an axial injection pipe. A cooling cavity communicated with the inside of the sealed chamber is formed in the grinding disc, and a plurality of radial injection holes communicated with the cooling cavity are circumferentially formed in the grinding disc.

[0005] As a further scheme of the present invention: a plurality of first air cavities are circumferentially formed at the inner bottom of the flexible clamping member. An annular second air cavity is formed in the inner wall of the flexible clamping member. The second air cavity is communicated with each first air cavity through an air passage. An annular bladder for flexibly clamping the outer ring of the bearing is arranged in the second air cavity, and a pressing plate is arranged in each second air cavity.

[0006] As a further scheme of the present invention: a cavity is formed in the turntable. A telescopic electric cylinder is arranged at the center of the cavity. The output end of the telescopic electric cylinder is connected with a lifting disc. Each pressing plate is fixedly connected with the lifting disc through a connecting column. A plurality of ventilation holes communicated with the outside are formed at the bottom of the cavity.

[0007] As a further scheme of the present invention: a ejector rod movably extending into the recessed part is arranged in each group of first air cavities, and the ejector rod is fixedly connected with the corresponding pressing plate.

[0008] As a further scheme of the present invention: a transition chamber is arranged in the rotating shaft. A flow passage communicating the transition chamber with the cooling cavity is axially formed in the rotating shaft. A plurality of communication holes communicated with the inside of the sealed chamber are circumferentially formed on the outer peripheral surface of the transition chamber.

[0009] As a further scheme of the present invention: an upper annular partition plate and a lower annular partition plate are sequentially arranged in the sealed chamber from top to bottom. The upper annular partition plate divides the top of the sealed chamber to form a liquid inlet chamber communicated with the liquid inlet pipe, and the lower annular partition plate divides the bottom of the sealed chamber to form a liquid discharge chamber communicated with the axial injection pipe. A plurality of turbine blades are circumferentially arranged on the outer peripheral surface of the transition chamber, and the turbine blades are located between the upper annular partition plate and the lower annular partition plate.

[0010] As a further scheme of the present invention: a workpiece table is arranged on the upper end face of the frame. A first baffle plate and a second baffle plate for limiting and guiding the outer ring of the bearing are respectively arranged on both sides of the workpiece table. A transfer channel for accommodating the outer ring of the bearing is formed between the first baffle plate and the second baffle plate, and a notch adapted to the flexible clamping member is formed in the middle of the transfer channel.

[0011] As a further solution of the present invention: It further includes a transfer unit. The transfer unit includes a mounting plate fixed to one side of the transfer channel. A transverse sliding rail is fixed on the mounting plate. A transverse sliding table is slidably mounted on the transverse sliding rail. A transverse air cylinder for driving the transverse sliding table is arranged at the bottom of the mounting plate. A through groove adapted to the transverse air cylinder is formed on the mounting plate. A longitudinal sliding rail is fixed on the transverse sliding table. A longitudinal sliding table is slidably mounted on the longitudinal sliding rail. A longitudinal air cylinder for driving the longitudinal sliding table is arranged on the transverse sliding table. Multiple groups of positioning clips adapted to the outer ring of the bearing are mounted on the longitudinal sliding table. An arc plate that fits the outer peripheral surface of the bearing outer ring is arranged on the positioning clip.

[0012] The present invention also discloses a method for using a four-row cylindrical bearing raceway grinding and processing device, including the following steps: Step 1: Place the bearing outer ring into the flexible clamping member, and perform flexible centering clamping on the bearing outer ring through the flexible clamping member. Step 2: The lifting air cylinder drives the grinding disc to move down to the raceway processing position. Start the grinding motor to drive the grinding disc to rotate. The feeding electric cylinder drives the bearing outer ring to perform radial feeding. At the same time, the rotating motor drives the bearing outer ring to rotate at a constant speed to complete the circumferential raceway grinding. Step 3: The multi-directional dynamic cooling member synchronously opens the dual coolant jets in the axial and radial directions to suppress temperature rise and remove debris.

[0013] The beneficial effects of the present invention: By applying a uniform clamping force to the outer wall of the bearing outer ring through the flexible clamping member, the clamping stress is suppressed, the clamping deformation is small, and the occurrence of micro-cracks caused by stress concentration is avoided. Through flexible clamping, the initial eccentricity of the workpiece is automatically compensated, the coaxiality error between the bearing outer ring and the turntable is effectively reduced, the circumferential phase deviation of the raceway is reduced, and the load distribution uniformity of the four-row rollers is improved. Especially for the thin-walled bearing outer ring with a small wall thickness, the flexible clamping member can absorb the grinding vibration and suppress the excessive waviness. The multi-directional dynamic cooling member integrates axial injection and radial injection, which can comprehensively cover the grinding contact area, block thermal damage, effectively reduce the temperature rise in the grinding area, and eliminate the risk of surface burn. The high-pressure coolant flushes the grinding interface in a turbulent mode, reduces the residue amount of debris, and avoids micro-cracks caused by the secondary extrusion of abrasive grains. Brief Description of the Drawings

[0014] The following further describes the present invention with reference to the drawings.

[0015] Figure 1 It is a three-dimensional schematic diagram of a four-row cylindrical bearing raceway grinding and processing device of the present invention; Figure 2 It is a bottom structure schematic diagram of a four-row cylindrical bearing raceway grinding and processing device of the present invention; Figure 3Schematic diagram of the structure of the loading unit in a four-row cylindrical bearing raceway grinding and machining device of the present invention; Figure 4 Cross-sectional view of the turntable and the flexible clamping member in a four-row cylindrical bearing raceway grinding and machining device of the present invention; Figure 5 For Figure 4 Enlarged view at A in Figure 6 Schematic diagram of the structure of the frame and the grinding unit in a four-row cylindrical bearing raceway grinding and machining device of the present invention; Figure 7 Cross-sectional view of the grinding unit in a four-row cylindrical bearing raceway grinding and machining device of the present invention; Figure 8 Schematic diagram of the structure of the transfer unit in a four-row cylindrical bearing raceway grinding and machining device of the present invention.

[0016] In the figure: 100, frame; 110, workpiece table; 120, first baffle; 130, second baffle; 140, notch; 200, loading unit; 210, feed electric cylinder; 220, feed slide; 230, rotation motor; 240, turntable; 241, cavity; 242, telescopic electric cylinder; 243, lifting disc; 244, vent hole; 250, flexible clamping member; 251, first air chamber; 252, second air chamber; 253, annular bladder; 254, air duct; 255, ejector rod; 256, extrusion plate; 257, connecting column; 260, recessed part; 300, grinding unit; 310, bracket; 320, vertical slide rail; 330, lifting table; 340, lifting cylinder; 350, grinding motor; 360, grinding disc; 361, cooling cavity; 362, radial injection hole; 370, rotating shaft; 371, transition bin; 372, communication hole; 373, flow channel; 374, turbine blade; 380, multi-directional dynamic cooling member; 381, sealed bin; 382, upper annular partition; 383, lower annular partition; 384, liquid inlet bin; 385, liquid discharge bin; 386, liquid inlet pipe; 387, axial injection pipe; 400, transfer unit; 410, mounting plate; 411, through groove; 420, transverse slide rail; 430, transverse slide; 440, transverse cylinder; 450, longitudinal slide rail; 460, longitudinal slide; 470, longitudinal cylinder; 480, positioning clip; 481, arc plate; 500, bearing outer ring. Detailed implementation manners

[0017] Reference will now be made to exemplary embodiments to discuss the subject matter described herein. It should be understood that discussing these embodiments is only to enable those skilled in the art to better understand and thus implement the subject matter described herein, and that changes can be made to the functions and arrangements of the elements discussed without departing from the scope of protection of the content of this specification. Each example can omit, substitute, or add various processes or components as needed. Additionally, the features described relative to some examples can also be combined in other examples.

[0018] Please refer to Figure 1 and Figure 2 , the present invention discloses a four-column cylindrical bearing raceway grinding device for grinding the inner wall of the bearing outer ring 500, which includes a frame 100, a loading unit 200, and a grinding unit 300; Please refer to Figure 3 , the loading unit 200 includes a feed electric cylinder 210 horizontally fixed on the frame 100 and a feed slide 220 connected to the output end of the feed electric cylinder 210. A rotary motor 230 is vertically installed on the feed slide 220. A turntable 240 is installed at the output end of the rotary motor 230. A flexible clamping member 250 adapted to the bearing outer ring 500 is provided on the turntable 240. A recess 260 for accommodating the bearing outer ring 500 is provided inside the flexible clamping member 250; Please refer to Figure 6 , the grinding unit 300 includes a bracket 310 fixed on the frame 100, a vertical slide rail 320 vertically installed on the bracket 310, and a lifting table 330 slidably connected to the vertical slide rail 320. A lifting cylinder 340 is connected between the bracket 310 and the lifting table 330. A grinding motor 350 is vertically installed on the lifting table 330. A rotating shaft 370 is connected to the output end of the grinding motor 350. A grinding disc 360 is provided at the lower end of the rotating shaft 370. A multi-directional dynamic cooling member 380 adapted to the grinding disc 360 is provided on the lower end surface of the lifting cylinder 340; Specifically, place the bearing outer ring 500 to be ground in the recess 260 inside the flexible clamping member 250. Flexibly clamp the outer wall of the bearing outer ring 500 through the flexible clamping member 250 to keep the bearing outer ring 500 coaxially aligned and fixed with the turntable 240. Drive the lifting table 330 to descend through the lifting cylinder 340 until the grinding disc 360 just inserts into the bearing outer ring 500 and is flush with the height of the raceway to be processed. Then start the grinding motor 350 to drive the rotating shaft 370 and the grinding disc 360 to rotate circumferentially. Use the feed electric cylinder 210 to drive the feed slide 220 to radially feed relative to the grinding disc 360, so that the inner wall of the bearing outer ring 500 gradually approaches the grinding disc 360. Then, the inner wall of the bearing outer ring 500 can be ground by the grinding disc 360. At the same time, drive the turntable 240 and the bearing outer ring 500 to rotate synchronously and uniformly through the rotating motor 230, so that the inner wall of the bearing outer ring 500 can be circumferentially ground uniformly to form a complete raceway. During the raceway grinding process, the multi-directional dynamic cooling member 380 performs double dynamic spraying of coolant in the axial and radial directions at the contact position between the grinding disc 360 and the bearing outer ring 500, avoiding the retention of debris generated by grinding and preventing burn and micro-crack defects at the grinding points.

[0019] It should be noted that in the present invention, the flexible clamping member 250 applies a uniform clamping force to the outer wall of the bearing outer ring 500, inhibits the clamping stress, has a small clamping deformation amount, and avoids micro-cracks caused by stress concentration. Automatically compensate for the initial eccentricity of the workpiece through flexible clamping, effectively reduce the coaxiality error between the bearing outer ring 500 and the turntable 240, reduce the circumferential phase deviation of the raceway, and improve the load distribution uniformity of the four-row rollers. Especially for the thin-walled bearing outer ring with a small wall thickness, the flexible clamping member 250 can absorb the grinding vibration and inhibit the excessive waviness. The multi-directional dynamic cooling member 380 integrates axial spraying and radial spraying, can comprehensively cover the grinding contact area, block thermal damage, effectively reduce the temperature rise in the grinding area, and eliminate the risk of surface burn. The high-pressure coolant flushes the grinding interface in a turbulent mode, reduces the amount of debris residue, and avoids micro-cracks caused by the secondary extrusion of abrasive grains.

[0020] Further, please refer to Figure 6 and Figure 7 The multi-directional dynamic cooling member 380 includes a sealed chamber 381 fixed to the lower end face of the lifting table 330. One side of the top of the sealed chamber 381 is connected to a liquid inlet pipe 386, and the bottom of the sealed chamber 381 is connected to an axial spraying pipe 387. A cooling cavity 361 communicating with the inside of the sealed chamber 381 is opened in the grinding disc 360, and a plurality of radial spraying holes 362 communicating with the cooling cavity 361 are circumferentially opened on the grinding disc 360. Specifically, the coolant enters the sealed chamber 381 through the liquid inlet pipe 386. Subsequently, a part of the coolant is axially ejected downward from the axial ejection pipe 387 at the bottom of the sealed chamber 381, so as to vertically spray onto the contact area between the grinding disc 360 and the outer ring 500 of the bearing, instantaneously covering the grinding point, effectively reducing the temperature rise of the grinding point, and avoiding surface burn of the grinding point; another part of the coolant enters the cooling cavity 361 through the rotating shaft 370 and is radially ejected from each radial ejection hole 362. The coolant is evenly scattered around through the radial ejection holes 362 to form an annular coolant curtain, improving the circumferential cooling coverage rate of the raceway and reducing the density of microcracks.

[0021] It should be noted that the high-pressure coolant ejected from the axial ejection pipe 387 scours the grinding interface at an inclination angle, which can effectively reduce the residual amount of debris and avoid the distortion of the raceway profile caused by secondary extrusion; the atomized particles of the coolant ejected from the radial ejection holes 362 penetrate into the gaps between the abrasive grains to achieve micro-lubrication, thereby improving the self-sharpening of the grinding disc 360 and effectively reducing the surface roughness of the raceway.

[0022] In one embodiment, please refer to Figure 3 、 Figure 4 and Figure 5 , a plurality of first air chambers 251 are circumferentially formed at the inner bottom of the flexible clamping member 250, an annular second air chamber 252 is formed on the inner wall of the flexible clamping member 250, the second air chamber 252 is communicated with each first air chamber 251 through an air passage 254, an annular bladder 253 for flexibly clamping the outer ring 500 of the bearing is arranged in the second air chamber 252, and an extrusion plate 256 is arranged in each second air chamber 252; Specifically, after the outer ring 500 of the bearing is placed in the recessed portion 260 of the flexible clamping member 250, the gas in the corresponding first air chamber 251 is squeezed downward by each group of extrusion plates 256, so that the gas synchronously enters the second air chamber 252 through the corresponding air passage 254, thereby increasing the air pressure in the second air chamber 252, prompting the annular bladder 253 to radially expand and extend out of the second air chamber 252, and using the expanded annular bladder 253 to circumferentially squeeze and fix the outer wall of the outer ring 500 of the bearing, so as to realize the centering adjustment and flexible clamping of the outer ring 500 of the bearing.

[0023] Furthermore, please refer to Figure 4 and Figure 5 , a cavity 241 is formed in the turntable 240, a telescopic electric cylinder 242 is arranged at the center of the cavity 241, the output end of the telescopic electric cylinder 242 is connected with a lifting disc 243, and each extrusion plate 256 is fixedly connected with the lifting disc 243 through a connecting column 257; a plurality of ventilation holes 244 communicating with the outside are formed at the bottom of the cavity 241; Specifically, in the initial state, the telescopic electric cylinder 242 is in the extended posture. At this time, the lifting plate 243 is located at the top of the cavity 241. At the same time, each pressing plate 256 is also located at the inner top of the corresponding first air chamber 251. At this time, the annular bladder 253 is in the contracted state. When it is necessary to clamp the outer ring 500 of the bearing, the lifting plate 243 is driven by the telescopic electric cylinder 242 to move downward, driving each pressing plate 256 to move downward synchronously, so as to squeeze the gas in the corresponding first air chamber 251 into the second air chamber 252, so as to realize the expansion of the annular bladder 253.

[0024] It should be noted that in order to ensure the independence and sealing performance between the first air chamber 251 and the second air chamber 252, the cavity 241 and each first air chamber 251 need to be relatively sealed. That is to say, during the movement of the connecting column 257, the gas in the first air chamber 251 will not leak into the cavity 241. The vent hole 244 at the bottom of the cavity 241 can ensure that the air pressure between the cavity 241 and the outside always remains balanced during the up and down movement of the lifting plate 243.

[0025] Furthermore, please refer to Figure 4 and Figure 5 , a push rod 255 that movably extends into the recess 260 is provided in each group of first air chambers 251, and the push rod 255 is fixedly connected to the corresponding pressing plate 256; Specifically, in the initial state, the push rod 255 is in the posture of extending upward into the recess 260. At this time, the height of the uppermost end of the push rod 255 is flush with the upper end surface of the flexible clamping member 250, so as to facilitate the horizontal movement of the outer ring 500 of the bearing to be processed into the flexible clamping member 250, and at the same time facilitate the horizontal movement of the processed outer ring 500 of the bearing out of the flexible clamping member 250; When the outer ring 500 of the bearing to be processed is moved above the recess 260, the lower end surface of the outer ring 500 of the bearing is supported by the push rods 255 that are pushed upward in each group; then the telescopic electric cylinder 242 drives each pressing plate 256 to move downward, so as to cause the annular bladder 253 to expand to flexibly clamp the outer ring 500 of the bearing; at the same time, drive each group of push rods 255 to synchronously retract into the first air chamber 251, and the outer ring 500 of the bearing automatically falls into the recess 260 under the action of gravity; It should be noted that the actions of the push rod 255 and the annular bladder 253 are synchronized. During the falling process of the outer ring 500 of the bearing, the annular bladder 253 gradually expands. When the push rod 255 is completely retracted into the first air chamber 251, the outer ring 500 of the bearing falls in place. At this time, the annular bladder 253 also just expands in place to realize the centering clamping of the outer ring 500 of the bearing.

[0026] When the grinding of the outer ring 500 of the bearing is completed, the telescopic electric cylinder 242 drives each pressing plate 256 to move upward, prompting the annular capsule piece 253 to retract into the second air chamber 252 to release the flexible clamping of 500. At the same time, it drives each group of ejector rods 255 to eject upward, so as to synchronously eject the outer ring 500 of the bearing in the recess 260 upward, facilitating the horizontal removal of this group of outer rings 500 of the bearing.

[0027] It should be noted that in this embodiment, during the downward clamping stage, the telescopic electric cylinder 242 drives the lifting disc 243 to move downward, drives the pressing plate 256 to press downward through the connecting column 257, presses the gas in the first air chamber 251 into the second air chamber 252 through the air duct 254. The air pressure in the second air chamber 252 increases, pushing the annular capsule piece 253 to expand and protrude radially, exerting a uniform clamping force on the outer wall of the outer ring 500 of the bearing; at the same time, the ejector rod 255 moves downward with the pressing plate 256, and the outer ring 500 of the bearing accurately falls into the recess 260 under the action of gravity, and there is no impact during the clamping process; During the upward release stage, the telescopic electric cylinder 242 drives the lifting disc 243 to move upward, the pressing plate 256 resets, and the gas in the second air chamber 252 flows back to the first air chamber 251 through the air duct 254. The decrease in air pressure causes the annular capsule piece 253 to contract into the second air chamber 252, releasing the clamping of the outer ring 500 of the bearing; at the same time, the ejector rod 255 moves upward with the pressing plate 256, smoothly ejecting the outer ring 500 of the bearing from the recess 260, and there is zero contact damage during the loading and unloading process.

[0028] In another embodiment, please refer to Figure 7 , a transition chamber 371 is provided in the rotating shaft 370, a flow channel 373 communicating the transition chamber 371 with the cooling chamber 361 is axially opened in the rotating shaft 370, and a plurality of communication holes 372 communicating with the inside of the sealing chamber 381 are circumferentially opened on the outer peripheral surface of the transition chamber 371; Specifically, when the rotating shaft 370 rotates circumferentially, since the communication holes 372 and the sealing chamber 381 always remain in communication, the coolant in the sealing chamber 381 can enter the transition chamber 371 through each communication hole 372, and then enter the cooling chamber 361 through the flow channel 373, so as to ensure that during the rotation and grinding of the grinding disc 360, the coolant can always be continuously ejected from each radial ejection hole 362 smoothly.

[0029] Furthermore, please refer to Figure 7The sealing chamber 381 is provided with an upper annular partition 382 and a lower annular partition 383 from top to bottom. The upper annular partition 382 separates the top of the sealing chamber 381 to form a liquid inlet chamber 384 connected to the liquid inlet pipe 386, and the lower annular partition 383 separates the bottom of the sealing chamber 381 to form a liquid discharge chamber 385 connected to the axial injection pipe 387; a plurality of turbine blades 374 are circumferentially arranged on the outer circumferential surface of the transition chamber 371, and the turbine blades 374 are located between the upper annular partition 382 and the lower annular partition 383; Specifically, when the grinding motor 350 drives the rotating shaft 370 to rotate, it can drive the turbine blades 374 to rotate synchronously, so that the turbine blades 374 can drive the coolant in the liquid inlet tank 384 to flow downward in a spiral, which can not only increase the spray flow rate of the coolant in the axial injection pipe 387 and the radial injection hole 362, but also make the coolant in each area of ​​the sealing chamber 381 evenly mixed, thereby improving the heat exchange effect.

[0030] It should be noted that, in this embodiment, the rotating shaft 370 drives the turbine blade 374 to rotate through the centrifugal supercharging of the turbine blade 374, and the coolant is spirally pressed down from the liquid inlet bin 384 to the liquid discharge bin 385, thereby improving the flow rate and flushing efficiency of the axial injection pipe 387; the connecting hole 372 and the transition bin 371 are always connected when the rotating shaft 370 rotates, thereby ensuring the pressure in the cooling chamber 361 is stable and ensuring the uniformity of the coolant coverage of the radial injection hole 362; The upper annular baffle 382 and the lower annular baffle 383 separate the sealing chamber 381 into a liquid inlet chamber 384 and a liquid discharge chamber 385, forcing the coolant to flow along the spiral path of the turbine blades 374 to improve the heat exchange efficiency; the turbulence generated by the turbine blades 374 allows the coolant to be fully mixed, and the local temperature rise is suppressed through turbulent mixing, thereby reducing the temperature gradient in the grinding area and avoiding micro cracks caused by local overheating of the raceway.

[0031] In further embodiments, see Figure 6 The upper end surface of the frame 100 is provided with a workpiece table 110, and the first baffle 120 and the second baffle 130 for limiting and guiding the bearing outer ring 500 are respectively provided on both sides of the workpiece table 110, and a transfer channel for accommodating the bearing outer ring 500 is formed between the first baffle 120 and the second baffle 130, and a notch 140 adapted to the flexible clamping member 250 is opened in the middle of the transfer channel; For further information, see Figure 1 , Figure 2 and Figure 8, further comprising a transfer unit 400. The transfer unit 400 includes a mounting plate 410 fixed to one side of the transfer channel. A transverse sliding rail 420 is fixed on the mounting plate 410. A transverse sliding table 430 is slidably mounted on the transverse sliding rail 420. A transverse air cylinder 440 for driving the transverse sliding table 430 is provided at the bottom of the mounting plate 410. A through groove 411 adapted to the transverse air cylinder 440 is formed on the mounting plate 410. A longitudinal sliding rail 450 is fixed on the transverse sliding table 430. A longitudinal sliding table 460 is slidably mounted on the longitudinal sliding rail 450. A longitudinal air cylinder 470 for driving the longitudinal sliding table 460 is provided on the transverse sliding table 430. A plurality of positioning clips 480 adapted to the outer ring 500 of the bearing are mounted on the longitudinal sliding table 460. An arc plate 481 adapted to the outer peripheral surface of the outer ring 500 of the bearing is provided on the positioning clip 480; Specifically, a plurality of outer rings 500 of bearings to be ground are placed at the loading end of the transfer channel. When it is necessary to move the outer ring 500 of the bearing into the flexible clamping member 250, first, the longitudinal air cylinder 470 is used to drive the longitudinal sliding table 460 to move longitudinally, so that the positioning clip 480 is longitudinally inserted into the transfer channel until the arc plate 481 of the positioning clip 480 fits the outer peripheral surface of the corresponding outer ring 500 of the bearing. Subsequently, the transverse air cylinder 440 drives the transverse sliding table 430 to move transversely, and the positioning clip 480 can be used to horizontally move the group of outer rings 500 of the bearing into the flexible clamping member 250. Then, the longitudinal air cylinder 470 drives the longitudinal sliding table 460 to retract, and the transverse air cylinder 440 drives the transverse sliding table 430 to retract, and the positioning clip 480 is reset; By repeating this process, the outer ring 500 of the bearing to be processed can be horizontally moved into the flexible clamping member 250, and at the same time, the processed outer ring 500 of the bearing can be horizontally moved out of the flexible clamping member 250.

[0032] The present invention also provides a method for using a four-row cylindrical bearing raceway grinding and processing device, including the following steps: Step 1: Place the outer ring 500 of the bearing into the flexible clamping member 250, and perform flexible centering clamping on the outer ring 500 of the bearing through the flexible clamping member 250; Step 2: The lifting air cylinder 340 drives the grinding disc 360 to move down to the raceway processing position, start the grinding motor 350 to drive the grinding disc 360 to rotate, the feeding electric cylinder 210 drives the outer ring 500 of the bearing to feed radially, and at the same time, the rotating motor 230 drives the outer ring 500 of the bearing to rotate at a constant speed to complete the circumferential raceway grinding; Step 3: The multi-directional dynamic cooling member 380 synchronously opens the axial and radial double coolant jets to suppress temperature rise and remove debris.

[0033] The specific embodiments of the present invention have been described above. However, the present invention is not limited to the above specific embodiments. The above specific embodiments are merely illustrative rather than restrictive. Under the inspiration of the present invention, those skilled in the art can also make many forms, all of which fall within the protection scope of the present invention.

Claims

1. A four-column cylindrical bearing raceway grinding device for grinding the inner wall of the outer ring (500) of a bearing, characterized in that, Comprising: A frame (100); A loading unit (200), which includes a feeding electric cylinder (210) horizontally fixed on the frame (100) and a feeding slide (220) connected to the output end of the feeding electric cylinder (210). A rotating motor (230) is vertically installed on the feeding slide (220). A turntable (240) is installed at the output end of the rotating motor (230). A flexible clamping member (250) adapted to the outer ring of the bearing (500) is provided on the turntable (240). A recess (260) for accommodating the outer ring of the bearing (500) is provided in the flexible clamping member (250); A grinding unit (300), which includes a bracket (310) fixed on the frame (100), a vertical slide rail (320) vertically installed on the bracket (310), and a lifting table (330) slidably connected to the vertical slide rail (320). A lifting cylinder (340) is connected between the bracket (310) and the lifting table (330). A grinding motor (350) is vertically installed on the lifting table (330). A rotating shaft (370) is connected to the output end of the grinding motor (350). A grinding disc (360) is provided at the lower end of the rotating shaft (370). A multi-directional dynamic cooling member (380) adapted to the grinding disc (360) is provided on the lower end surface of the lifting cylinder (340); The multi-directional dynamic cooling member (380) includes a sealed chamber (381) fixed on the lower end surface of the lifting table (330). One side of the top of the sealed chamber (381) is communicated with a liquid inlet pipe (386), and the bottom of the sealed chamber (381) is communicated with an axial injection pipe (387); A cooling chamber (361) communicated with the inside of the sealed chamber (381) is opened in the grinding disc (360), and a plurality of radial injection holes (362) communicated with the cooling chamber (361) are circumferentially opened on the grinding disc (360).

2. The four-column cylindrical bearing raceway grinding device according to claim 1, characterized in that, A plurality of first air chambers (251) are circumferentially opened at the inner bottom of the flexible clamping member (250). An annular second air chamber (252) is opened on the inner wall of the flexible clamping member (250). The second air chamber (252) is communicated with each first air chamber (251) through an air passage (254). An annular bladder (253) for flexibly clamping the outer ring of the bearing (500) is provided in the second air chamber (252). An extrusion plate (256) is provided in each second air chamber (252).

3. A four-column cylindrical bearing raceway grinding device according to claim 2, characterized in that, A cavity (241) is opened in the turntable (240). A telescopic electric cylinder (242) is provided at the center of the cavity (241). The output end of the telescopic electric cylinder (242) is connected to a lifting disc (243). Each extrusion plate (256) is fixedly connected to the lifting disc (243) through a connecting column (257); A plurality of ventilation holes (244) communicated with the outside are opened at the bottom of the cavity (241).

4. A four-column cylindrical bearing raceway grinding device according to claim 3, characterized in that, A push rod (255) that actively extends into the recess (260) is provided in each group of first air chambers (251). The push rod (255) is fixedly connected to the corresponding extrusion plate (256).

5. A four-column cylindrical bearing raceway grinding and machining device according to claim 1, characterized in that, A transition chamber (371) is arranged inside the rotating shaft (370). A flow channel (373) that axially penetrates the rotating shaft (370) and communicates the transition chamber (371) with the cooling chamber (361) is provided. A plurality of communication holes (372) that communicate with the inside of the sealing chamber (381) are circumferentially formed on the outer peripheral surface of the transition chamber (371).

6. A four-column cylindrical bearing raceway grinding and machining device according to claim 5, characterized in that, An upper annular partition (382) and a lower annular partition (383) are sequentially arranged in the sealing chamber (381) from top to bottom. The upper annular partition (382) divides the top of the sealing chamber (381) to form a liquid inlet chamber (384) that communicates with the liquid inlet pipe (386). The lower annular partition (383) divides the bottom of the sealing chamber (381) to form a liquid discharge chamber (385) that communicates with the axial injection pipe (387). A plurality of turbine blades (374) are circumferentially arranged on the outer peripheral surface of the transition chamber (371). The turbine blades (374) are located between the upper annular partition (382) and the lower annular partition (383).

7. A four-column cylindrical bearing raceway grinding device according to claim 1, characterized in that, A workpiece table (110) is arranged on the upper end surface of the machine frame (100). A first baffle (120) and a second baffle (130) for limiting and guiding the outer ring of the bearing (500) are respectively arranged on both sides of the workpiece table (110). A transfer channel for accommodating the outer ring of the bearing (500) is formed between the first baffle (120) and the second baffle (130). A notch (140) adapted to the flexible clamping member (250) is formed in the middle of the transfer channel.

8. A four-column cylindrical bearing raceway grinding and machining device according to claim 7, characterized in that, It further includes a transfer unit (400). The transfer unit (400) includes a mounting plate (410) fixed to one side of the transfer channel. A transverse sliding rail (420) is fixed on the mounting plate (410). A transverse sliding table (430) is slidably mounted on the transverse sliding rail (420). A transverse air cylinder (440) for driving the transverse sliding table (430) is arranged at the bottom of the mounting plate (410). A through groove (411) adapted to the transverse air cylinder (440) is formed on the mounting plate (410). A longitudinal sliding rail (450) is fixed on the transverse sliding table (430). A longitudinal sliding table (460) is slidably mounted on the longitudinal sliding rail (450). A longitudinal air cylinder (470) for driving the longitudinal sliding table (460) is arranged on the transverse sliding table (430). A plurality of positioning clip pieces (480) adapted to the outer ring of the bearing (500) are mounted on the longitudinal sliding table (460). An arc-shaped plate (481) that fits the outer peripheral surface of the outer ring of the bearing (500) is arranged on the positioning clip piece (480).

9. A method of using the four-column cylindrical bearing raceway grinding device according to any one of claims 1-8, characterized in that, It includes the following steps: Step 1: Place the outer ring of the bearing (500) into the flexible clamping member (250), and perform flexible centering clamping on the outer ring of the bearing (500) through the flexible clamping member (250). Step 2: The lifting air cylinder (340) drives the grinding disc (360) to move down to the raceway processing position. Start the grinding motor (350) to drive the grinding disc (360) to rotate. The feeding electric cylinder (210) drives the outer ring of the bearing (500) to feed radially. At the same time, the rotating motor (230) drives the outer ring of the bearing (500) to rotate at a constant speed to complete the circumferential raceway grinding. Step 3: The multi-directional dynamic cooling component (380) simultaneously activates dual coolant injections in the axial and radial directions to suppress temperature rise and remove debris.

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