Four-row cylindrical bearing raceway grinding device and method

Abstract

The present invention relates to the field of grinding technology, and specifically discloses a four-row cylindrical bearing raceway grinding device and method, wherein the four-row cylindrical bearing raceway grinding device comprises: a loading unit, which comprises a turntable, on which a flexible clamping member adapted to the outer ring of the bearing is provided, and a recessed portion is provided in the flexible clamping member; a grinding unit, which comprises a grinding motor, the output end of the grinding motor is connected to a rotating shaft, the lower end portion of the rotating shaft is provided with a grinding disc, and the lower end surface of the lifting cylinder is provided with a multi-directional dynamic cooling member. A uniform clamping force is applied to the outer wall of the outer ring of the bearing by the flexible clamping member to suppress the clamping stress, reduce the clamping deformation, and avoid micro cracks caused by stress concentration; the multi-directional dynamic cooling member integrates axial injection and radial injection to block thermal damage, effectively reduce the temperature rise in the grinding zone, and eliminate the risk of surface burns; the high-pressure coolant flushes the grinding interface in a turbulent mode to avoid micro cracks caused by secondary extrusion of abrasive particles.

Description

Technical Field

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

[0002] Four-row cylindrical bearings have four rows of cylindrical rollers arranged side by side in the same bearing assembly. They are mainly used to bear heavy radial loads. The load is shared by multiple rows of rollers, improving the load-bearing capacity and rigidity. The raceways are grooves machined on the outer surface of the bearing inner ring and the inner surface of the bearing outer ring. They are used to define the rolling track of the rollers in the circumferential direction and carry the radial loads applied by the rollers.

[0003] In the existing four-row cylindrical bearing raceway grinding process, there are problems of burns and micro cracks during raceway grinding; in the traditional grinding process, the coolant supply method is relatively single, usually only a single flow direction of coolant spray can be provided, which cannot fully cover the grinding contact area, resulting in an increase in the temperature of the grinding point, which is prone to burns and micro cracks; in addition, the existing clamping method is mostly rigid clamping, and the clamping force applied to the outer ring of the bearing is uneven, which is easy to cause stress concentration and lead to large clamping deformation. Stress concentration will not only cause micro cracks, but also affect the coaxiality of the outer ring of the bearing, thereby affecting the machining accuracy of the raceway. Summary of the Invention

[0004] In order to overcome the above technical problems, the present invention proposes a four-row cylindrical bearing raceway grinding device and method.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A four-row cylindrical bearing raceway grinding device is used for performing raceway grinding on the inner wall of the bearing outer ring, comprising:

[0007] frame;

[0008] The loading unit includes a feed electric cylinder horizontally fixed to a frame and a feed slide connected to the output end of the feed electric cylinder. A rotary motor is vertically mounted on the feed slide. A turntable is mounted on the output end of the rotary motor. A flexible clamp adapted to fit the outer ring of the bearing is provided on the turntable. A recessed portion for accommodating the outer ring of the bearing is provided in the flexible clamp.

[0009] The grinding unit includes a bracket fixed on the frame, a vertical slide rail vertically mounted on the bracket, and a lifting platform slidably connected to the vertical slide rail. A lifting cylinder is connected between the bracket and the lifting platform. A grinding motor is vertically mounted on the lifting platform. The output end of the grinding motor is connected to a rotating shaft. A grinding disc is provided at the lower end of the rotating shaft. A multi-directional dynamic cooling member adapted to the grinding disc is provided on the lower end surface of the lifting cylinder.

[0010] The multi-directional dynamic cooling component includes a sealed chamber fixed to the lower end surface of the lifting platform, a liquid inlet pipe is connected to one side of the top of the sealed chamber, and an axial injection pipe is connected to the bottom of the sealed chamber; a cooling cavity connected to the interior of the sealed chamber is opened in the grinding disc, and a plurality of radial injection holes connected to the cooling cavity are opened circumferentially on the grinding disc.

[0011] As a further solution of the present invention: a plurality of first air cavities are circumferentially opened on the inner bottom of the flexible clamping member, a ring-shaped second air cavity is opened on the inner wall of the flexible clamping member, the second air cavity is connected to each first air cavity through an air passage, an annular capsule for flexibly clamping the outer ring of the bearing is arranged in the second air cavity, and an extrusion plate is arranged in each second air cavity.

[0012] As a further solution of the present invention: a cavity is opened in the turntable, a telescopic electric cylinder is arranged in the center of the cavity, the output end of the telescopic electric cylinder is connected to the lifting plate, and each extrusion plate is fixedly connected to the lifting plate through a connecting column; a plurality of vents connected to the outside are opened at the bottom of the cavity.

[0013] As a further solution of the present invention: each group of first air cavities is provided with a push rod that movably extends into the recessed portion, and the push rod is fixedly connected to the corresponding extrusion plate.

[0014] As a further solution of the present invention: a transition chamber is provided in the rotating shaft, a flow channel connecting the transition chamber and the cooling chamber is axially opened in the rotating shaft, and a plurality of connecting holes connected to the interior of the sealing chamber are circumferentially opened on the outer circumference of the transition chamber.

[0015] As a further solution of the present invention: an upper annular baffle and a lower annular baffle are arranged in sequence from top to bottom in the sealed chamber, the upper annular baffle separates the top of the sealed chamber to form a liquid inlet chamber connected to the liquid inlet pipe, and the lower annular baffle separates the bottom of the sealed chamber to form a liquid discharge chamber connected to 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 baffle and the lower annular baffle.

[0016] As a further solution of the present invention: a workpiece table is provided on the upper end face of the frame, and a first baffle and a second baffle are respectively provided on both sides of the workpiece table to limit and guide the outer ring of the bearing, and a transfer channel for accommodating the outer ring of the bearing is formed between the first baffle and the second baffle, and a notch adapted to the flexible clamping part is opened in the middle of the transfer channel.

[0017] As a further solution of the present invention: it also includes a transfer unit, which includes a mounting plate fixed on one side of the transfer channel, a transverse slide rail fixed on the mounting plate, a transverse slide slidably mounted on the transverse slide rail, a transverse cylinder for driving the transverse slide is provided at the bottom of the mounting plate, and a through groove adapted to the transverse cylinder is provided on the mounting plate; a longitudinal slide rail is fixed on the transverse slide, a longitudinal slide is slidably mounted on the longitudinal slide rail, a longitudinal cylinder for driving the longitudinal slide is provided on the transverse slide, and a plurality of positioning clips adapted to the outer ring of the bearing are installed on the positioning clip, and an arc-shaped plate is provided on the positioning clip that fits the outer circumferential surface of the outer ring of the bearing.

[0018] The present invention also discloses a method for grinding a raceway of a four-row cylindrical bearing using the device, comprising the following steps:

[0019] Step 1: Place the outer ring of the bearing into the flexible clamping piece, and perform flexible centering clamping on the outer ring of the bearing through the flexible clamping piece;

[0020] Step 2: The lifting cylinder drives the grinding disc down to the raceway processing position, the grinding motor is started to drive the grinding disc to rotate, the feed electric cylinder drives the radial feed of the bearing outer ring, and at the same time, the rotary motor drives the bearing outer ring to rotate at a constant speed to complete the circumferential raceway grinding;

[0021] Step 3: The multi-directional dynamic cooling element simultaneously starts the axial and radial dual coolant injection to suppress temperature rise and remove debris.

[0022] Beneficial effects of the present invention:

[0023] The flexible clamping device applies a uniform clamping force to the outer wall of the bearing outer ring, suppressing clamping stress, minimizing clamping deformation, and avoiding micro cracks caused by stress concentration. The flexible clamping device automatically compensates for the initial eccentricity of the workpiece, effectively reducing the coaxiality error between the bearing outer ring and the turntable, reducing the circumferential phase deviation of the raceway, and improving the load distribution of the four rows of rollers. Especially for thin-walled bearing outer rings with small wall thickness, the flexible clamping device can absorb grinding vibration and suppress excessive corrugation.

[0024] The multi-directional dynamic cooling element integrates axial and radial injection, which can fully cover the grinding contact area, block thermal damage, effectively reduce the temperature rise in the grinding area, and eliminate the risk of surface burns; high-pressure coolant flushes the grinding interface in a turbulent mode, reducing the amount of debris residue and avoiding micro cracks caused by secondary extrusion of abrasive particles. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be further described below with reference to the accompanying drawings.

[0026] Figure 1 It is a three-dimensional schematic diagram of a four-row cylindrical bearing raceway grinding device of the present invention;

[0027] Figure 2 This is a schematic diagram of the bottom structure of a four-row cylindrical bearing raceway grinding device according to the present invention;

[0028] Figure 3 It is a structural schematic diagram of a loading unit in a four-row cylindrical bearing raceway grinding device of the present invention;

[0029] Figure 4 A cross-sectional view of a turntable and a flexible clamping member in a four-row cylindrical bearing raceway grinding device of the present invention;

[0030] Figure 5 for Figure 4 Enlarged view of point A in the middle;

[0031] Figure 6 Schematic diagram of the structure of a frame and a grinding unit in a four-row cylindrical bearing raceway grinding device of the present invention;

[0032] Figure 7 A cross-sectional view of a grinding unit in a four-row cylindrical bearing raceway grinding apparatus according to the present invention;

[0033] Figure 8 The figure is a schematic structural diagram of a transfer unit in a four-row cylindrical bearing raceway grinding device according to the present invention.

[0034] In the picture:

[0035] 100, frame; 110, workpiece platform; 120, first baffle; 130, second baffle; 140, notch;

[0036] 200, loading unit; 210, feed cylinder; 220, feed slide; 230, rotary motor; 240, turntable; 241, cavity; 242, telescopic cylinder; 243, lifting plate; 244, vent; 250, flexible clamp; 251, first air cavity; 252, second air cavity; 253, annular capsule; 254, airway; 255, ejector pin; 256, extrusion plate; 257, connecting column; 260, recessed portion;

[0037] 300, grinding unit; 310, bracket; 320, vertical slide rail; 330, lifting platform; 340, lifting cylinder; 350, grinding motor; 360, grinding disc; 361, cooling chamber; 362, radial injection hole; 370, rotating shaft; 371, transition chamber; 372, connecting hole; 373, flow channel; 374, turbine blade; 380, multi-directional dynamic cooling element; 381, sealing chamber; 382, upper annular partition; 383, lower annular partition; 384, liquid inlet chamber; 385, liquid discharge chamber; 386, liquid inlet pipe; 387, axial injection pipe;

[0038] 400, transfer unit; 410, mounting plate; 411, through slot; 420, transverse slide rail; 430, transverse slide table; 440, transverse cylinder; 450, longitudinal slide rail; 460, longitudinal slide table; 470, longitudinal cylinder; 480, positioning clip; 481, curved plate;

[0039] 500. Bearing outer ring. DETAILED DESCRIPTION

[0040] The subject matter described herein will now be discussed with reference to exemplary embodiments. It should be understood that these embodiments are discussed solely to enable those skilled in the art to better understand and implement the subject matter described herein, and that the functions and arrangements of the elements discussed may be varied without departing from the scope of this specification. Various examples may omit, substitute, or add various processes or components as needed. In addition, features described with respect to some examples may also be combined in other examples.

[0041] See also Figure 1 and Figure 2 The present invention discloses a four-row cylindrical bearing raceway grinding device for performing raceway grinding on the inner wall of a bearing outer ring 500, comprising a frame 100, a loading unit 200 and a grinding unit 300;

[0042] See also Figure 3 The loading unit 200 includes a feed electric cylinder 210 horizontally fixed to 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 mounted on the feed slide 220. A turntable 240 is mounted on 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 recessed portion 260 for accommodating the bearing outer ring 500 is provided in the flexible clamping member 250.

[0043] See also Figure 6 The grinding unit 300 includes a bracket 310 fixed to the frame 100, a vertical slide rail 320 vertically mounted on the bracket 310, and a lifting platform 330 slidably connected to the vertical slide rail 320. A lifting cylinder 340 is connected between the bracket 310 and the lifting platform 330. A grinding motor 350 is vertically mounted on the lifting platform 330. The output end of the grinding motor 350 is connected to a rotating shaft 370. 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.

[0044] Specifically, the bearing outer ring 500 to be ground is placed in the recessed portion 260 in the flexible clamping part 250, and the outer wall of the bearing outer ring 500 is flexibly clamped by the flexible clamping part 250, so that the bearing outer ring 500 and the turntable 240 are kept coaxially aligned and fixed; the lifting cylinder 340 drives the lifting platform 330 downward until the grinding disc 360 is just inserted into the bearing outer ring 500 and is flush with the processing raceway height; then the grinding motor 350 is started to drive the rotating shaft 370 and the grinding disc 360 to rotate circumferentially; the feed electric cylinder 210 is used to drive the feed slide 220 to feed radially relative to the grinding disc 360 , so that the inner wall of the bearing outer ring 500 gradually approaches the grinding disc 360, and the inner wall of the bearing outer ring 500 can be ground by the grinding disc 360. At the same time, the rotary motor 230 drives the turntable 240 and the bearing outer ring 500 to rotate synchronously at a uniform speed, so that the inner wall of the bearing outer ring 500 can be ground at a uniform circumferential speed to form a complete raceway; during the raceway grinding process, the multi-directional dynamic cooling member 380 performs axial and radial dual coolant dynamic spraying on the contact position between the grinding disc 360 and the bearing outer ring 500 to avoid the retention of debris generated by grinding, and at the same time prevent burns and micro crack defects from occurring at the grinding points.

[0045] It should be noted that the present invention applies a uniform clamping force to the outer wall of the bearing outer ring 500 through the flexible clamping member 250, thereby suppressing clamping stress, minimizing clamping deformation, and avoiding micro cracks caused by stress concentration. The flexible clamping automatically compensates for the initial eccentricity of the workpiece, effectively reducing the coaxiality error between the bearing outer ring 500 and the turntable 240, reducing the circumferential phase deviation of the raceway, and improving the load uniformity of the four rows of rollers. In particular, for thin-walled bearing outer rings with small wall thicknesses, the flexible clamping member 250 can absorb grinding vibration and suppress excessive waviness.

[0046] The multi-directional dynamic cooling element 380 integrates axial and radial injection, which can fully cover the grinding contact area, block thermal damage, effectively reduce the temperature rise in the grinding area, and eliminate the risk of surface burns; high-pressure coolant flushes the grinding interface in a turbulent mode, reducing the amount of debris residue and avoiding micro cracks caused by secondary extrusion of abrasive particles.

[0047] Further, see Figure 6 and Figure 7 The multi-directional dynamic cooling element 380 includes a sealed chamber 381 fixed to the lower end surface of the lifting platform 330. The top side 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 injection pipe 387. The grinding disc 360 is provided with a cooling chamber 361 connected to the interior of the sealed chamber 381. The grinding disc 360 is provided with a plurality of radial injection holes 362 connected to the cooling chamber 361 in a circumferential direction.

[0048] Specifically, the coolant enters the sealed chamber 381 through the liquid inlet pipe 386, and then a part of the coolant is ejected axially downward from the axial injection pipe 387 at the bottom of the sealed chamber 381, thereby vertically spraying toward the contact area between the grinding disc 360 and the bearing outer ring 500, instantaneously covering the grinding point, effectively reducing the temperature rise of the grinding point, and avoiding surface burns of the grinding point; the other part of the coolant enters the cooling chamber 361 through the rotating shaft 370 and is radially ejected from each radial injection hole 362. The coolant is evenly scattered to the surroundings through the radial injection hole 362, forming an annular coolant curtain, thereby improving the circumferential cooling coverage of the raceway and reducing the density of micro cracks.

[0049] It is worth noting that the high-pressure coolant sprayed from the axial jet tube 387 flushes the grinding interface at an inclined angle, which can effectively reduce the amount of debris residue and avoid the deformation of the raceway profile caused by secondary extrusion; the coolant atomized particles sprayed from the radial jet hole 362 penetrate into the gap between the abrasive particles to achieve micro-lubrication, thereby improving the self-sharpening performance of the grinding disc 360 and effectively reducing the surface roughness of the raceway.

[0050] In one embodiment, see Figure 3 、 Figure 4 and Figure 5 The flexible clamping member 250 has a plurality of first air cavities 251 circumferentially defined on its bottom. An annular second air cavity 252 is defined on its inner wall. The second air cavities 252 are connected to the first air cavities 251 via air passages 254. An annular capsule 253 for flexibly clamping the bearing outer ring 500 is disposed in the second air cavity 252. An extrusion plate 256 is disposed in each second air cavity 252.

[0051] Specifically, after the bearing outer ring 500 is placed in the recessed portion 260 of the flexible clamping member 250, the gas in the corresponding first air cavity 251 is squeezed downward by each group of extrusion plates 256, so that the gas synchronously enters the second air cavity 252 through the corresponding air channel 254, thereby increasing the air pressure in the second air cavity 252, prompting the annular capsule 253 to expand radially and extend from the second air cavity 252, and the outer wall of the bearing outer ring 500 is circumferentially squeezed and fixed by using the expanded annular capsule 253, thereby realizing the centering adjustment and flexible clamping of the bearing outer ring 500.

[0052] Further, see Figure 4 and Figure 5 A cavity 241 is defined within the turntable 240. A telescopic electric cylinder 242 is disposed in the center of the cavity 241. The output end of the telescopic electric cylinder 242 is connected to a lifting plate 243. Each extrusion plate 256 is fixedly connected to the lifting plate 243 via a connecting column 257. A plurality of vent holes 244 communicating with the outside are defined at the bottom of the cavity 241.

[0053] Specifically, in the initial state, the telescopic electric cylinder 242 is in an extended posture, at this time the lifting plate 243 is located at the top of the cavity 241, and at the same time each extrusion plate 256 is also located at the top of the corresponding first air cavity 251, and at this time the annular capsule 253 is in a contracted state; when the bearing outer ring 500 needs to be clamped, the lifting plate 243 is driven downward by the telescopic electric cylinder 242, driving each extrusion plate 256 to move downward synchronously, thereby squeezing the gas in the corresponding first air cavity 251 into the second air cavity 252 to achieve the expansion of the annular capsule 253.

[0054] It should be noted that in order to ensure the independence and sealing between the first air cavity 251 and the second air cavity 252, the cavity 241 and each first air cavity 251 need to be relatively sealed, that is, during the movement of the connecting column 257, the gas in the first air cavity 251 will not leak into the cavity 241; the vent hole 244 at the bottom of the cavity 241 can ensure that the cavity 241 and the external air pressure are always balanced during the up and down movement of the lifting plate 243.

[0055] For further information, see Figure 4 and Figure 5 , each group of first air cavities 251 is provided with a push rod 255 that movably extends into the recessed portion 260 , and the push rod 255 is fixedly connected to the corresponding extrusion plate 256 ;

[0056] Specifically, in the initial state, the push rod 255 is in a posture of extending upward into the recessed portion 260. At this time, the uppermost end of the push rod 255 is flush with the upper end surface of the flexible clamping member 250, thereby facilitating the horizontal movement of the bearing outer ring 500 to be processed into the flexible clamping member 250, and also facilitating the horizontal movement of the processed bearing outer ring 500 out of the flexible clamping member 250.

[0057] When the bearing outer ring 500 to be processed moves into the upper portion of the recess 260, the lower end surface of the bearing outer ring 500 is supported by the upwardly protruding push rods 255 of each group. Then, the telescopic electric cylinder 242 drives the extrusion plates 256 downward, causing the annular capsule 253 to expand and flexibly clamp the bearing outer ring 500. At the same time, the push rods 255 of each group are synchronously retracted downward into the first air cavity 251, and the bearing outer ring 500 automatically falls into the recess 260 under the action of gravity.

[0058] It should be noted that the actions of the push rod 255 and the annular capsule 253 are carried out synchronously. During the falling process of the bearing outer ring 500, the annular capsule 253 gradually expands. When the push rod 255 is completely retracted into the first air cavity 251, the bearing outer ring 500 falls into place. At this time, the annular capsule 253 also expands into place to achieve the centering clamping of the bearing outer ring 500.

[0059] When the grinding of the bearing outer ring 500 is completed, the extrusion plates 256 are driven upward by the telescopic electric cylinder 242, causing the annular capsule 253 to retract into the second air cavity 252 to release the flexible clamping of 500, and at the same time drive each group of ejector rods 255 to be ejected upward, thereby synchronously ejecting the bearing outer ring 500 in the recessed portion 260 upward, so as to facilitate the horizontal movement of the group of bearing outer rings 500.

[0060] It is worth noting that in this embodiment, during the downward clamping stage, the telescopic electric cylinder 242 drives the lifting plate 243 to move downward, which drives the extrusion plate 256 to press downward through the connecting column 257, pressing the gas in the first air chamber 251 into the second air chamber 252 through the air channel 254. The air pressure in the second air chamber 252 increases, pushing the annular capsule 253 to expand radially and extend, exerting a uniform clamping force on the outer wall of the bearing outer ring 500; at the same time, the ejector rod 255 moves downward with the extrusion plate 256, and the bearing outer ring 500 falls accurately into the recessed portion 260 under the action of gravity, and the clamping process is impact-free.

[0061] During the upward release stage, the telescopic electric cylinder 242 drives the lifting plate 243 to move upward, the extrusion plate 256 returns to its original position, and the gas in the second air cavity 252 flows back to the first air cavity 251 through the air channel 254. The air pressure is reduced, causing the annular capsule 253 to shrink into the second air cavity 252, thereby releasing the clamping of the bearing outer ring 500. At the same time, the ejector rod 255 moves upward with the extrusion plate 256, and smoothly ejects the bearing outer ring 500 from the recessed portion 260, with zero contact damage during the loading and unloading process.

[0062] In yet another embodiment, see Figure 7 A transition chamber 371 is provided in the rotating shaft 370. A flow channel 373 is axially opened in the rotating shaft 370 to connect the transition chamber 371 and the cooling chamber 361. A plurality of communication holes 372 are circumferentially opened on the outer circumference of the transition chamber 371 to communicate with the interior of the sealing chamber 381.

[0063] Specifically, when the rotating shaft 370 rotates circumferentially, since the connecting holes 372 and the sealed chamber 381 are always connected, the coolant in the sealed chamber 381 can enter the transition chamber 371 through each connecting hole 372, and then enter the cooling chamber 361 through the flow channel 373, so as to ensure that during the rotating grinding action of the grinding disc 360, the coolant can always be continuously and uninterruptedly ejected from each radial injection hole 362.

[0064] Further, see Figure 7The sealed 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 sealed 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 sealed chamber 381 to form a liquid discharge chamber 385 connected to the axial injection pipe 387; a plurality of turbine blades 374 are circumferentially provided on the outer circumference of the transition chamber 371, and the turbine blades 374 are located between the upper annular partition 382 and the lower annular partition 383;

[0065] Specifically, when the grinding motor 350 drives the rotating shaft 370 to rotate, it can drive the turbine blades 374 to rotate synchronously, thereby using the turbine blades 374 to 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 sealed chamber 381 evenly mixed, thereby improving the heat exchange effect.

[0066] It should be noted that in this embodiment, the centrifugal supercharging of the turbine blades 374 causes the rotating shaft 370 to rotate the turbine blades 374, spirally pressing the coolant from the liquid inlet chamber 384 downward to the liquid discharge chamber 385, thereby increasing the flow rate and flushing efficiency of the axial injection pipe 387. The communicating hole 372 and the transition chamber 371 remain in contact with each other during the rotation of the rotating shaft 370, thereby ensuring stable pressure in the cooling chamber 361 and uniform coolant coverage of the radial injection holes 362.

[0067] The upper annular partition 382 and the lower annular partition 383 separate the sealed 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 turbulent mixing suppresses local temperature rise, reduces the temperature gradient in the grinding area, and avoids micro cracks caused by local overheating of the raceway.

[0068] In further embodiments, see Figure 6 A workpiece platform 110 is provided on the upper end surface of the frame 100. A first baffle 120 and a second baffle 130 are respectively provided on both sides of the workpiece platform 110 for limiting and guiding the bearing outer ring 500. A transfer channel for accommodating the bearing outer ring 500 is formed between the first baffle 120 and the second baffle 130. A notch 140 adapted to the flexible clamping member 250 is opened in the middle of the transfer channel;

[0069] Further, see Figure 1 、 Figure 2 and Figure 8, also includes a transfer unit 400, which includes a mounting plate 410 fixed to one side of the transfer channel, a transverse slide rail 420 fixed on the mounting plate 410, a transverse slide 430 slidably mounted on the transverse slide rail 420, a transverse cylinder 440 for driving the transverse slide 430 is provided at the bottom of the mounting plate 410, and a through groove 411 adapted to the transverse cylinder 440 is opened on the mounting plate 410; a longitudinal slide rail 450 is fixed on the transverse slide 430, a longitudinal slide 460 is slidably mounted on the longitudinal slide rail 450, and a longitudinal cylinder 470 for driving the longitudinal slide 460 is provided on the transverse slide 430, and a plurality of positioning clips 480 adapted to the bearing outer ring 500 are installed on the positioning clip 480, and an arc-shaped plate 481 that fits the outer circumferential surface of the bearing outer ring 500 is provided on the positioning clip 480;

[0070] Specifically, multiple groups of bearing outer rings 500 to be ground are placed at the loading end of the transfer channel. When the bearing outer rings 500 need to be moved into the flexible clamping member 250, the longitudinal cylinder 470 is first used to drive the longitudinal slide 460 to move longitudinally, so that the positioning clip 480 is longitudinally inserted into the transfer channel until the arc-shaped plate 481 of the positioning clip 480 is in contact with the outer circumference of the corresponding bearing outer ring 500. Then, the transverse cylinder 440 drives the transverse slide 430 to move transversely, and the positioning clip 480 can be used to horizontally move the group of bearing outer rings 500 into the flexible clamping member 250; then the longitudinal cylinder 470 drives the longitudinal slide 460 to retract, and the transverse cylinder 440 drives the transverse slide 430 to retract, and the positioning clip 480 is reset;

[0071] In this way, the bearing outer ring 500 to be processed can be horizontally moved into the flexible clamping member 250 , and the processed bearing outer ring 500 can be horizontally moved out of the flexible clamping member 250 .

[0072] The present invention also provides a method for using the four-row cylindrical bearing raceway grinding device, comprising the following steps:

[0073] Step 1: Place the bearing outer ring 500 into the flexible clamping member 250 and perform flexible centering clamping on the bearing outer ring 500 through the flexible clamping member 250;

[0074] Step 2: The lifting cylinder 340 drives the grinding disc 360 to move down to the raceway processing position, and the grinding motor 350 is started to rotate the grinding disc 360. The feed cylinder 210 drives the bearing outer ring 500 to feed radially. At the same time, the rotating motor 230 drives the bearing outer ring 500 to rotate at a constant speed to complete the circumferential raceway grinding.

[0075] Step 3: The multi-directional dynamic cooling element 380 simultaneously starts the axial and radial dual coolant injection to suppress the temperature rise and remove debris.

[0076] The above describes the specific embodiments of the present invention, but the present invention is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the guidance of the present invention, those skilled in the art can also make many forms, all of which are protected by the present invention.

Claims

1. A four-row cylindrical bearing raceway grinding device for performing raceway grinding on the inner wall of a bearing outer ring (500), characterized in that: include: rack(100); A loading unit (200) comprising a feed electric cylinder (210) fixed horizontally on a frame (100) and a feed slide (220) connected to an output end of the feed electric cylinder (210), a rotary motor (230) being vertically mounted on the feed slide (220), a turntable (240) being mounted on the output end of the rotary motor (230), a flexible clamping member (250) adapted to the bearing outer ring (500) being provided on the turntable (240), and a recessed portion (260) for accommodating the bearing outer ring (500) being provided in the flexible clamping member (250); A grinding unit (300) comprises a bracket (310) fixed on a frame (100), a vertical slide rail (320) vertically mounted on the bracket (310), and a lifting platform (330) slidably connected to the vertical slide rail (320); a lifting cylinder (340) is connected between the bracket (310) and the lifting platform (330); a grinding motor (350) is vertically mounted on the lifting platform (330); an output end of the grinding motor (350) is connected to a rotating shaft (370); a grinding disc (360) is provided at the lower end of the rotating shaft (370); and 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 element (380) includes a sealing chamber (381) fixed to the lower end surface of the lifting platform (330), a top side of the sealing chamber (381) is connected to a liquid inlet pipe (386), and a bottom of the sealing chamber (381) is connected to an axial injection pipe (387); a cooling cavity (361) connected to the interior of the sealing chamber (381) is provided in the grinding disc (360), and a plurality of radial injection holes (362) connected to the cooling cavity (361) are provided on the grinding disc (360) in a circumferential direction; The flexible clamping member (250) has a plurality of first air cavities (251) circumferentially formed on the bottom of the flexible clamping member (250), and an annular second air cavity (252) is formed on the inner wall of the flexible clamping member (250). The second air cavity (252) is connected to each of the first air cavities (251) via an air passage (254). An annular capsule (253) for flexibly clamping the bearing outer ring (500) is provided in the second air cavity (252), and an extrusion plate (256) is provided in each of the second air cavities (252). A cavity (241) is provided in the turntable (240), a telescopic electric cylinder (242) is provided at the center of the cavity (241), an output end of the telescopic electric cylinder (242) is connected to a lifting plate (243), and each extrusion plate (256) is fixedly connected to the lifting plate (243) via a connecting column (257); a plurality of vent holes (244) communicating with the outside are provided at the bottom of the cavity (241); Each group of first air cavities (251) is provided with a push rod (255) that movably extends into the recessed portion (260), and the push rod (255) is fixedly connected to the corresponding extrusion plate (256).

2. A four-row cylindrical bearing raceway grinding device according to claim 1, characterized in that: A transition chamber (371) is provided in the rotating shaft (370), a flow channel (373) is axially opened in the rotating shaft (370) for connecting the transition chamber (371) and the cooling chamber (361), and a plurality of communication holes (372) are circumferentially opened on the outer peripheral surface of the transition chamber (371) for connecting with the interior of the sealing chamber (381).

3. The four-row cylindrical bearing raceway grinding device according to claim 2, 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) separates the top of the sealing chamber (381) to form a liquid inlet chamber (384) in communication with 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) in communication 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), and the turbine blades (374) are located between the upper annular partition (382) and the lower annular partition (383).

4. The four-row cylindrical bearing raceway grinding device according to claim 1, characterized in that: A workpiece platform (110) is provided on the upper end surface of the frame (100), and a first baffle (120) and a second baffle (130) for limiting and guiding the bearing outer ring (500) are respectively provided on both sides of the workpiece platform (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.

5. The four-row cylindrical bearing raceway grinding device according to claim 4, characterized in that: The transfer unit (400) further comprises a mounting plate (410) fixed to one side of the transfer channel, a transverse slide rail (420) being fixed to the mounting plate (410), a transverse slide table (430) being slidably mounted on the transverse slide rail (420), a transverse cylinder (440) for driving the transverse slide table (430) being provided at the bottom of the mounting plate (410), and a through slot (411) adapted to the transverse cylinder (440) being provided on the mounting plate (410); A longitudinal slide rail (450) is fixed on the transverse slide (430), a longitudinal slide (460) is slidably mounted on the longitudinal slide rail (450), a longitudinal cylinder (470) for driving the longitudinal slide (460) is provided on the transverse slide (430), a plurality of positioning clips (480) adapted to the bearing outer ring (500) are installed on the longitudinal slide (460), and an arc-shaped plate (481) is provided on the positioning clip (480) that fits the outer peripheral surface of the bearing outer ring (500).

6. A method for using the four-row cylindrical bearing raceway grinding device according to any one of claims 1 to 5, characterized in that: The following steps are involved: Step 1: Place the bearing outer ring (500) into the flexible clamping member (250), and perform flexible centering clamping on the bearing outer ring (500) through the flexible clamping member (250); Step 2: The lifting cylinder (340) drives the grinding disc (360) to move down to the raceway processing position, the grinding motor (350) is started to drive the grinding disc (360) to rotate, the feed electric cylinder (210) drives the bearing outer ring (500) to feed radially, and at the same time, the rotating motor (230) drives the bearing outer ring (500) to rotate at a uniform speed to complete the circumferential raceway grinding; Step 3: The multi-directional dynamic cooling element (380) simultaneously starts the axial and radial dual coolant injection to suppress the temperature rise and remove debris.

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