Bearing cylindrical roller grinding apparatus and method based on online electrolytic dressing technique

Abstract

This invention discloses a bearing cylindrical roller grinding device based on online electrolytic dressing technology, including a chassis, a lower grinding disc assembly, a pressurizing device, a slide module, a rotary table assembly, and a programmable pulse power supply. This invention also discloses a bearing cylindrical roller grinding method based on online electrolytic dressing technology. This invention utilizes online electrolytic dressing technology with periodic start and stop of the programmable pulse power supply to achieve a dynamic balance between the nonlinear electrolytic effect during grinding and the inhibitory effect of the oxide film formed on the grinding wheel surface on the electrolytic process. Online electrolytic dressing of the grinding wheel during grinding significantly reduces the labor intensity of processing personnel and improves production efficiency. During grinding, the cylindrical rollers rotate while sliding back and forth along the V-groove of the grinding wheel. This specific grinding motion results in high material removal efficiency and good uniformity, leading to high surface precision and good batch consistency of the processed cylindrical rollers.

Description

Technical Field

[0001] This invention relates to the field of cylindrical roller grinding technology, and more specifically to a bearing cylindrical roller grinding apparatus and method based on online electrolytic dressing technology. Background Technology

[0002] Bearings are widely used precision components in the equipment manufacturing industry, and rolling elements are the most critical and vulnerable parts of bearings. They bear the majority of the bearing load, and rolling element contact fatigue is the main form of failure in rolling bearings. Cylindrical rollers, as a type of rolling element in bearings, have a line contact with the raceway, enabling them to withstand high loads. They are particularly suitable for heavy-duty, high-speed rotating machinery, such as high-speed machine tool spindles, wind turbines, high-speed train gearboxes, and aero engines.

[0003] The outer diameter of cylindrical rollers is the main working surface of rolling bearings, and its shape accuracy, surface quality, and consistency have a significant impact on the bearing's motion accuracy and service life. Currently, the main methods for finishing the outer diameter of cylindrical rollers include centerless grinding, centerless ultra-precision grinding, and centering reciprocating ultra-precision grinding. During the grinding process, the grinding performance of bonded abrasives is one of the important process factors affecting the machining efficiency and quality of the outer cylindrical surface of the rollers. Bonded abrasives generally consist of three parts: abrasive, bonding agent, and additives. The abrasive plays a role in material removal during grinding, while the bonding agent mainly serves to bind and hold the abrasive grains. Besides ensuring sufficient holding strength during grinding, it must also ensure that dulled abrasive grains detach in a timely manner to maintain a good grinding condition. Additives mainly reduce abrasive clogging, improve wear resistance, and provide lubrication.

[0004] During the grinding process of cylindrical rollers, abrasive grains continuously wear and detach, requiring the grinding wheel to be removed and resharpened to achieve the desired cutting edge height. The loading, unloading, and resharpening of the grinding wheel are all done manually, severely impacting processing efficiency and accuracy. Furthermore, traditional methods result in low material removal rates and poor surface uniformity of the processed rollers. In summary, traditional techniques suffer from the following problems: 1) High labor intensity for operators; 2) Repeated disassembly and reassembly of the grinding wheel leads to decreased positioning accuracy; 3) Low processing efficiency; 4) Difficulty in ensuring dimensional and accuracy consistency of the processed rollers. Summary of the Invention

[0005] This application provides a bearing cylindrical roller grinding apparatus based on online electrolytic dressing technology. This technology enables online electrolytic dressing of the grinding disc, eliminating the need for repeated disassembly and manual dressing, effectively reducing the labor intensity of operators and improving processing efficiency. Furthermore, this grinding apparatus can achieve batch processing of cylindrical rollers with high efficiency, while ensuring consistency in the dimensions and precision of the processed cylindrical rollers. Correspondingly, this application also provides a bearing cylindrical roller grinding method based on online electrolytic dressing technology.

[0006] The technical solution for the grinding device in this application is as follows:

[0007] A bearing cylindrical roller grinding device based on online electrolytic dressing technology includes a chassis, a lower grinding disc assembly, a pressurizing device, a slide module, a rotary table assembly, and a programmable pulse power supply. The slide module is mounted on a platform at the top of the chassis via a gantry frame. The pressurizing device is located on the slide of the slide module. The lower grinding disc assembly is located on the platform at the top of the chassis. The rotary table assembly is located inside the chassis and connected to the lower grinding disc assembly, enabling it to rotate. The pressurizing device includes an upper plate, a cam, a lifting driver, and a mounting plate. The mounting plate is located on the slide of the slide module and can be adjusted left and right. The lifting driver is fixedly mounted on the mounting plate. The upper plate is connected to the lifting driver and can rise or fall. The upper plate has an opening... The device has multiple injection ports. The cam is located on the lower end face of the upper plate and engages with the lower grinding disc assembly during grinding. The lower grinding disc assembly includes a lower plate base, a cage, a spring guide rod, and V-groove grinding tools. The lower plate base is connected to the rotary table assembly. The V-groove grinding tools are arranged in groups on the lower plate base and distributed radially along the lower plate base. The cage corresponds to each V-groove grinding tool and can slide radially on the lower plate base. The cage has a slot for placing cylindrical rollers. During grinding, the cam acts on the inner end of the cage, and the outer end of the cage is connected to the spring guide rod, thereby enabling the cage to reciprocate during grinding. The anode of the programmable pulse power supply is connected to the lower plate base, and its cathode is connected to the upper plate.

[0008] Compared with the prior art, the advantages of the present invention are as follows: In the grinding device of the present invention, the lower plate base and the upper plate are respectively connected to the anode and cathode of the programmable pulse power supply, which can perform online electrolytic dressing of the grinding wheel during the grinding process. The electrolytic intensity during the grinding process can be adjusted by adjusting the output parameters of the pulse power supply, thereby achieving the purpose of actively controlling the sharpness of the grinding wheel. In addition, by using a pressurizing device and the lower grinding disc assembly with a specific structure, during grinding, the upper plate applies pressure to the cylindrical roller, and the lower grinding disc assembly is driven to rotate by the rotary table assembly. The cylindrical roller rotates under the action of friction. At the same time, the cage reciprocates along the radial direction of the lower plate base under the action of the cam and the spring connecting rod, thereby driving the cylindrical roller to slide back and forth in the V-groove of the grinding wheel. The specific form of grinding motion results in good grinding uniformity, high material removal efficiency, high surface precision of the cylindrical roller after processing, and good batch consistency. Moreover, a batch of parts can be processed at one time, resulting in high processing efficiency.

[0009] Furthermore, the pressurizing device also includes a positioning assembly, which includes a connecting plate, guide rod A and guide rod B. The connecting plate is fixedly disposed relative to the telescopic rod of the lifting drive. Guide rod A and guide rod B are connected to the connecting plate through a cylindrical joint. The lower ends of guide rod A and guide rod B are fixedly connected to the upper plate.

[0010] In the technical solution of this invention, the connecting plate is used to limit the guide rods A and B. At the same time, the connection between the guide rods A and B and the upper plate effectively alleviates the vibration during the grinding process and prevents the upper plate from vibrating during operation, thus affecting the grinding accuracy of the cylindrical roller.

[0011] Furthermore, the pressurizing device also includes an elastic element, a pressure sensor, a guide rod, and a baffle. The pressure sensor is fixedly mounted on the upper plate. The upper plate and the guide rod are connected via a cylindrical joint. The lower end of the guide rod is provided with a limiting structure for supporting the upper plate. The cam is provided with a corresponding through hole structure that allows the guide rod to pass through. The lower end of the telescopic rod of the lifting driver is fixedly connected to the upper end of the guide rod. The baffle is located on the lower side of the connecting plate. The elastic element is located between the pressure sensor and the baffle.

[0012] In the technical solution of this invention, the elastic element and the pressure sensor work together to provide feedback on the load force of the upper plate when it is pressed down. In addition, the lower plate can be loaded according to the preset parameters, and the real-time feedback can be adjusted and changed according to the actual grinding situation. Furthermore, with this structure, the upper plate is floatingly connected to the guide rod, which can avoid damage to the cylindrical rollers during loading.

[0013] Furthermore, the spring guide rod includes a fixed seat and a spring connecting rod. The fixed seat is fixedly disposed on the outer surface of the lower plate base. One end of the spring connecting rod is fixedly connected to the retainer, and the other end is slidably limited on the fixed seat. In the technical solution of the present invention, the fixed seat plays a fixing role, and the spring connecting rod connected to the retainer plays a spring-back reset role for the retainer.

[0014] Furthermore, the V-groove abrasive is detachably mounted on the lower platen base, and the V-groove abrasive includes a base plate and a fixed abrasive body bonded to the base plate. This facilitates the disassembly, assembly, and replacement of the V-groove abrasive, simplifying future maintenance.

[0015] Furthermore, the rotary table assembly includes a connecting flange, a hollow rotary table, a reducer, a servo motor, and a mounting bracket. The mounting bracket is fixedly disposed within the chassis, the hollow rotary table is fixedly disposed on the mounting bracket, the servo motor is connected to the reducer, the output end of the reducer is connected to the connecting flange, and the connecting flange is fixedly connected to the lower plate base. In this invention, the rotary table assembly is used to drive the lower plate base to rotate. The rotary table assembly with the above-described structure is easy to implement and has high reliability.

[0016] Furthermore, the slide module also includes a guide rail, a handwheel, and a lead screw. The guide rail is fixedly mounted on the gantry frame, and the lead screw is connected to the handwheel and rotatably mounted on the gantry frame. The slide is slidably mounted on the guide rail and connected to the lead screw. The mounting plate is fixedly mounted on the slide. In this invention, the slide module allows the pressurizing device to be adjusted in the horizontal direction, thereby adjusting the reciprocating stroke of the cage and meeting different process requirements. The slide module adopts the above structural design, the handwheel is easy to operate, the self-locking property of the lead screw ensures good reliability, and the overall structure is easy to implement.

[0017] Regarding the grinding method, the technical solution of this application is as follows:

[0018] A bearing cylindrical roller grinding method based on online electrolytic dressing technology, which is implemented using the grinding device of the present invention, specifically includes the following processes:

[0019] The cylindrical rollers are placed in the slots of the cage; the pressurizing device presses down to contact the cylindrical rollers and applies a set load force to them; the output parameters of the programmable pulse power supply are adjusted to the set value and the programmable pulse power supply is turned on; the electrolyte is injected through the injection port of the upper plate; finally, the rotary table assembly is started.

[0020] During grinding, the programmable pulse power supply generates pulse current through periodic start and stop to electrolyze the grinding wheel online; the rotary table assembly drives the lower platen base to rotate, and the cylindrical rollers rotate under the friction between the upper platen and the rotary table; at the same time, the lower platen base rotates, the cam contacts and engages with the cage, and combined with the action of the spring guide rod, the cage and the cylindrical rollers reciprocate radially on the lower platen base.

[0021] Compared with existing technologies, the advantages of this invention are as follows: It utilizes an online electrolytic finishing technology with a programmable pulse power supply that periodically starts and stops (the pulse current intensity, pulse period, and duty cycle can be set as needed). This achieves a dynamic balance between the nonlinear electrolytic effect during the grinding process and the inhibitory effect of the oxide film formed on the grinding wheel surface on the electrolytic process. Online electrolytic finishing of the grinding wheel during the grinding process significantly reduces the labor intensity of processing personnel and improves production efficiency. Simultaneously, the grinding method of this invention involves the cylindrical roller rotating while sliding back and forth along the V-groove of the grinding wheel. This specific grinding motion results in high material removal efficiency and good uniformity, leading to high surface precision and good batch consistency of the processed cylindrical roller. Attached Figure Description

[0022] Figure 1 This is a perspective view of the grinding apparatus in the embodiments of this application;

[0023] Figure 2 This is a partial structural schematic diagram of the grinding device in an embodiment of this application;

[0024] Figure 3 This is a schematic diagram of the structure of the lower grinding disc assembly of the grinding device in the embodiments of this application;

[0025] Figure 4 This is a schematic diagram of the structure of the rotary table assembly of the grinding device in the embodiments of this application;

[0026] Figure 5 This is a schematic diagram of the structure of the grinding device chassis in the embodiments of this application;

[0027] Figure 6 This is a schematic diagram of the state of the grinding device during grinding in the embodiments of this application;

[0028] Figure 7 This is a connection diagram of the programmable pulse power supply of this application;

[0029] Figure 8 This is a schematic diagram of the pressurization device of this application.

[0030] The labels in the attached diagram are as follows: 1-Chassis; 2-Lower grinding disc assembly, 201-Lower disc base, 202-Retainer, 2021-Groove, 203-Spring guide rod, 2031-Fixed seat, 2032-Spring connecting rod, 204-V-groove grinding wheel; 3-Pressure device, 301-Upper disc, 3011-Injection port, 302-Cam, 303-Lifting drive, 304-Mounting plate, 305-Positioning assembly, 3051-Connecting plate, 30 52-Guide rod A, 3053-Guide rod B, 306-Pressure sensor, 307-Elastic element, 308-Guide rod, 309-Baffle; 4-Slide module, 401-Slide, 402-Guide rail, 403-Handwheel, 404-Screw; 5-Rotary table assembly, 501-Connecting flange, 502-Hollow rotary table, 503-Reducer, 504-Servo motor, 505-Mounting bracket; 7-Operation control panel; 8-Cylindrical roller; 9-Retaining ring. Detailed Implementation

[0031] The present application will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present application. In the following embodiments, content not described in detail is all common knowledge in the art.

[0032] Example (see) Figures 1 to 8 ):

[0033] A bearing cylindrical roller grinding device based on online electrolytic dressing technology includes a housing 1, a lower grinding disc assembly 2, a pressurizing device 3, a slide module 4, a rotary table assembly 5, a programmable pulse power supply, and a controller 7. The slide module 4 is mounted on the tabletop of the housing 1 via a gantry frame. The pressurizing device 3 is mounted on the slide 401 of the slide module 4. The lower grinding disc assembly 2 is mounted on the tabletop of the housing 1. The rotary table assembly 5 is located inside the housing 1 and is connected to the lower grinding disc assembly 2, enabling it to rotate. The pressurizing device 3 includes an upper plate 301, a cam 302, a lifting driver 303, and a mounting plate 304. The mounting plate 304 is mounted on the slide 401 of the slide module 4 and can be adjusted left and right. The lifting driver 303 is fixedly mounted on the mounting plate 304. The upper plate 301 is connected to the lifting driver 303 and can rise or fall. Multiple injection ports 3011 are provided on the upper plate 301. A cam 302 is located on the lower end face of the upper plate 301. During grinding, the cam 302 cooperates with the lower grinding plate assembly 2. The lower grinding plate assembly 2 includes a lower plate base 201, a retainer 202, a spring guide rod 203, and a V-groove grinding tool 204. The lower plate base 201 is connected to the rotary table assembly 5. The V-groove grinding tools 204 are arranged in groups on the lower plate base 201 and distributed radially along the lower plate base 201. The retainer 202 is arranged in a one-to-one correspondence with the V-groove grinding tool 204. The retainer 202 can slide radially on the lower plate base 201. The retainer 202 is provided with a groove 2021 for placing cylindrical rollers. During grinding, the cam 302 acts on the inner end of the retainer 202. The outer end of the retainer 202 is connected and cooperates with the spring guide rod 203, so that the retainer 202 can achieve reciprocating feed motion during grinding.

[0034] In a specific embodiment, the anode of the programmable pulse power supply is connected to the lower substrate 201 via a conductive slip ring, and its cathode is connected to the upper substrate 301. Figure 1 The programmable pulse power supply is not shown in the diagram. During manufacturing, the programmable pulse power supply can be placed on the table at the top of chassis 1.

[0035] In a specific embodiment, the cam 302 is tapered (i.e., its side is inclined). During the descent of the upper plate, the side of the cam contacts the inner end of the cage 202 and has a guiding effect, avoiding interference with the cage 202 and making loading more convenient.

[0036] In a specific embodiment, the grinding device is equipped with a controller 7, which is located on one side of the housing 1 and is used to set various grinding parameters (lower grinding disc speed 0-60 r / min, loading pressure 0-40 N, grinding time 10-30 min) and control the operation of the rotary table assembly 5 and the pressurizing device 3. In addition, a retaining ring 9 is provided on the upper surface of the housing 1, and the lower grinding disc assembly 2 is located inside the retaining ring 9. During grinding, the retaining ring 9 can stop the liquid and prevent the liquid from contaminating the table surface during grinding.

[0037] In a specific embodiment, the V-groove abrasive 204 is detachably mounted on the lower platen base 201. The V-groove abrasive 204 includes a base plate and a fixed abrasive body bonded to the base plate. The positive terminal of the programmable pulse power supply is connected to the lower platen base 201 (as the anode), and the negative terminal is connected to the upper platen 301 (as the cathode). During grinding, electrolytic grinding fluid is injected into the injection port 3011 of the upper platen 301. The programmable pulse power supply is turned on, and the pulse current output by the programmable pulse power supply causes the abrasive to undergo anodizing. Under the friction of the cylindrical rollers, the oxide layer is removed, achieving online electrolytic sharpening. At the same time, the upper platen 301 provides a load force to the cylindrical rollers under the action of the lifting driver 303, causing the cylindrical rollers to rotate in the V-groove of the abrasive during grinding. Meanwhile, the retainer 202, under the action of the cam 302 and the spring connecting rod 2032, reciprocates when the lower platen base 201 rotates (the reciprocating stroke can be controlled by the sliding table mold).

[0038] Group 4 (adjustment) allows the cylindrical roller to slide back and forth in the V-groove of the mold.

[0039] In a specific embodiment, the pressurizing device 3 further includes a positioning component 305, which includes a connecting plate 3051, a guide rod A 3052 and a guide rod B 3053. The connecting plate 3051 is fixedly disposed at the lower end of the mounting plate 304, and the guide rods A 3052 and B 3053 are slidably connected to the connecting plate 3051. The lower ends of the guide rods A 3052 and B 3053 are fixedly connected to the upper plate 301.

[0040] Guide rods A3052 and B3053 are respectively located at both ends of the upper plate 301. Guide rods A3052 and B3053 are slidably engaged with the connecting plate 3051. When the pressurizing device 3 is working, when the lifting driver 303 drives the telescopic rod to press down on the upper plate 301, guide rods A3052 and B3053 slide synchronously on the two through holes of the connecting plate 3051. During the grinding operation, guide rods A3052 and B3053 are engaged with the connecting plate 3051. The connecting plate 3051 limits the guide rods A3052 and B3053, preventing vibration of the upper plate 301 during operation and improving stability.

[0041] In a specific embodiment, the pressurizing device 3 further includes a positioning component 305, which includes a connecting plate 3051, a guide rod A 3052 and a guide rod B 3053. The connecting plate 3051 is fixedly arranged relative to the telescopic rod of the lifting driver 303. The guide rod A 3052 and the guide rod B 3053 are connected to the connecting plate 3051 through a cylindrical joint. The lower ends of the guide rod A 3052 and the guide rod B 3053 are fixedly connected to the upper plate 301. The pressurizing device 3 also includes an elastic element 307, a pressure sensor 306, a guide rod 308, and a baffle 309. The pressure sensor 306 is fixedly mounted on the upper plate 301. The upper plate 301 and the guide rod 308 are connected via a cylindrical joint. The lower end of the guide rod 308 is provided with a limiting structure for supporting the upper plate 301. The cam 302 is provided with a corresponding through hole structure that allows the guide rod 308 to pass through. The lower end of the telescopic rod of the lifting driver 303 is fixedly connected to the upper end of the guide rod 308. The baffle 309 is located on the lower side of the connecting plate 3051. The elastic element 307 is located between the pressure sensor 306 and the baffle 309. In this embodiment, the elastic element 307 is a spring. The connecting plate 3051 is fixedly connected to the guide rod 308. During grinding, the cylindrical roller 8 will exert an upward force on the upper plate 301, and then the deformation of the elastic element 307 will cause the pressure sensor 306 to feed back the loading force, thereby achieving the purpose of precise loading.

[0042] In a specific embodiment, the spring guide rod 203 includes a fixed base 2031 and a spring connecting rod 2032. The fixed base 2031 is fixedly disposed on the outer surface of the lower plate base 201. One end of the spring connecting rod 2032 is fixedly connected to the retainer 202, and the other end is slidably limited on the fixed base 2031. The V-groove mold 204 is detachably connected to the lower plate base 201 by a thread, and the retainer 202 is slidably disposed on the V-groove mold 204.

[0043] In a specific embodiment, the rotary table assembly 5 includes a connecting flange 501, a hollow rotary table 502, a reducer 503, a servo motor 504, and a mounting bracket 505. The mounting bracket 505 is fixedly installed inside the chassis 1, the hollow rotary table 502 is fixedly installed on the mounting bracket 505, the servo motor 504 is connected to the reducer 503, the output end of the reducer 503 is connected to the connecting flange 501, and the connecting flange 501 is fixedly connected to the lower plate base 201.

[0044] In a specific embodiment, the slide module 4 further includes a guide rail 402, a handwheel 403, and a lead screw 404. The guide rail 402 is fixedly mounted on the gantry frame, the lead screw 404 is connected to the handwheel 403 and rotatably mounted on the gantry frame, the slide 401 is slidably mounted on the guide rail 402 and connected to the lead screw 404, and the mounting plate 304 is fixedly mounted on the slide 401.

[0045] In a specific embodiment, the bearing cylindrical roller grinding method based on online electrolytic dressing technology specifically includes the following steps:

[0046] The cylindrical roller 8 is placed in the slot 2021 of the cage 202; the pressurizing device 3 presses down to contact the cylindrical roller 8 and applies a set load force to the cylindrical roller 8; the output parameters of the programmable pulse power supply are adjusted to the set values ​​(the current threshold can be set to 0.05~0.2 A / cm2, the pulse period can be set to 5~10μs, and the duty cycle can be set to 0.1~0.9), and the programmable pulse power supply is turned on; the electrolyte is injected through the injection port 3011 of the upper plate 301; finally, the rotary table assembly 5 is started; during grinding, the programmable pulse power supply outputs pulse current through periodic start and stop (in the experiment, the current threshold was 0.1A / cm2, the pulse period was 10μs, and the duty cycle was 0.5, which better realized the nonlinear electrolysis effect during the grinding process and the effect of the oxide film generated on the surface of the grinding wheel on the electrolysis). (Dynamic balance between the two that produce an inhibitory effect during the solution process); the rotary table assembly 5 drives the lower plate base 201 to rotate, and the cylindrical roller 8 rotates under the friction of the upper plate 301; at the same time, the lower plate base 201 rotates, the cam 302 contacts and engages with the cage 202, and combined with the action of the spring guide rod 203, the cage 202 together with the cylindrical roller 8 reciprocates radially on the lower plate base 201 (the reciprocating stroke of the cage 202 can be 10-30mm, in the embodiment, the reciprocating stroke is 20mm).

[0047] The online electrolytic dressing technology, which utilizes a programmable pulse power supply for periodic start and stop, performs online electrolytic sharpening of the grinding wheel during the grinding process, greatly reducing the labor intensity of the machining personnel. In addition, the structure of the grinding main motion and reciprocating feed motion enables batch processing of cylindrical rollers 8, improving processing efficiency and consistency of machining accuracy. Furthermore, it has the function of actively controlling the degree of electrolysis, allowing current parameters to be set according to different needs to achieve ideal processing results.

[0048] The influence of comparative experiments on the surface roughness (Ra) of cylindrical rollers was verified. The specific details are as follows: The two sets of experiments used the following devices: a traditional centerless grinding device and an online electrolytic grinding device of this embodiment. Bronze-based bonded CBN abrasives produced in the same batch were used for grinding. The grinding object was a group (10) of GCr15 bearing steel cylindrical rollers of the same size (diameter 20 mm, height 30 mm). The parameters such as grinding disc rotation, load force, and grinding fluid were set to be the same during the grinding process. The experimental parameters are shown in Table 1, and the experimental results (the surface roughness Ra of the roller cylindrical surface after grinding) are shown in Table 2.

[0049] Table 1: Experimental Parameters

[0050]

[0051] According to the experimental results, the cylindrical rollers produced by traditional centerless grinding have poor surface roughness consistency, resulting in uneven surface roughness in a batch of rollers, with the largest being 45.5 nm and the smallest being 23.3 nm. In contrast, the surface roughness consistency of this embodiment is better, with the largest being 33.2 nm and the smallest being 26.2 nm, resulting in more uniform surface roughness in the cylindrical rollers. Furthermore, the centerless grinding device can only process a single cylindrical roller, resulting in low processing efficiency, while the technology of this invention can process multiple rollers at once, offering a significant advantage in processing efficiency.

[0052] Table 2: Experimental Results Data

[0053]

[0054] The foregoing general description of the invention and its specific embodiments should not be construed as a limitation on the technical solution of the invention. Those skilled in the art, based on the disclosure of this application, can add, reduce, or combine the disclosed technical features in the foregoing general description and / or specific embodiments (including examples) without departing from the constituent elements of the invention, to form other technical solutions within the scope of protection of this application.

Claims

1. A bearing cylindrical roller grinding device based on online electrolytic dressing technology, characterized in that: It includes a chassis (1), a lower grinding disc assembly (2), a pressurizing device (3), a slide module (4), a rotary table assembly (5), and a programmable pulse power supply; The slide module (4) is mounted on the top of the chassis (1) via a gantry frame. The pressurizing device (3) is mounted on the slide (401) of the slide module (4). The lower grinding disc assembly (2) is mounted on the top of the chassis (1). The rotary table assembly (5) is mounted inside the chassis (1) and is connected to the lower grinding disc assembly (2) to drive the lower grinding disc assembly (2) to rotate. The pressurizing device (3) includes an upper plate (301), a cam (302), a lifting driver (303), and a mounting plate (304). The mounting plate (304) is located on the slide (401) of the slide module (4) and can be adjusted left and right. The lifting driver (303) is fixedly located on the mounting plate (304). The upper plate (301) is connected to the lifting driver (303) and can rise or fall. The upper plate (301) has multiple liquid injection ports (3011). The cam (302) is located on the lower end face of the upper plate (301). During grinding, the cam (302) cooperates with the lower grinding disc assembly (2). The lower grinding disc assembly (2) includes a lower disc base (201), a retainer (202), a spring guide rod (203), and a V-groove grinding tool (204). The lower disc base (201) is connected to the rotary table assembly (5). The V-groove grinding tools (204) are arranged in groups on the lower disc base (201) and distributed radially along the lower disc base (201). The retainer (202) is arranged in a one-to-one correspondence with the V-groove grinding tool (204). The retainer (202) can slide radially on the lower disc base (201). The retainer (202) is provided with a groove (2021) for placing cylindrical rollers. The cam (302) acts on the inner end of the retainer (202) during grinding. The outer end of the retainer (202) is connected and cooperated with the spring guide rod (203), so that the retainer (202) can achieve reciprocating feed motion during grinding. The anode of the programmable pulse power supply is connected to the lower plate substrate (201), and its cathode is connected to the upper plate (301); The pressurizing device (3) further includes a positioning component (305), which includes a connecting plate (3051), a guide rod A (3052), and a guide rod B (3053). The connecting plate (3051) is fixedly arranged relative to the telescopic rod of the lifting driver (303). The guide rod A (3052) and the guide rod B (3053) are connected to the connecting plate (3051) through a cylindrical joint. The lower ends of the guide rod A (3052) and the guide rod B (3053) are fixedly connected to the upper plate (301). The pressurizing device (3) further includes an elastic element (307), a pressure sensor (306), a guide rod (308), and a baffle (309). The pressure sensor (306) is fixedly mounted on the upper plate (301). The upper plate (301) and the guide rod (308) are connected by a cylindrical joint. The lower end of the guide rod (308) is provided with a limiting structure for supporting the upper plate (301). The cam (302) is provided with a through hole structure that allows the guide rod (308) to pass through. The lower end of the telescopic rod of the lifting driver (303) is fixedly connected to the upper end of the guide rod (308). The baffle (309) is located on the lower side of the connecting plate (3051). The elastic element (307) is located between the pressure sensor (306) and the baffle (309). The spring guide rod (203) includes a fixed seat (2031) and a spring connecting rod (2032). The fixed seat (2031) is fixedly disposed on the outer side of the lower plate base (201). One end of the spring connecting rod (2032) is fixedly connected to the retainer (202), and the other end is slidably limited on the fixed seat (2031).

2. The bearing cylindrical roller grinding device based on online electrolytic dressing technology according to claim 1, characterized in that: The V-groove abrasive (204) is detachably mounted on the lower plate base (201).

3. The bearing cylindrical roller grinding device based on online electrolytic dressing technology according to claim 1, characterized in that: The V-groove abrasive (204) includes a substrate and a fixed abrasive body bonded to the substrate.

4. The bearing cylindrical roller grinding device based on online electrolytic dressing technology according to claim 1, characterized in that: The rotary table assembly (5) includes a connecting flange (501), a hollow rotary table (502), a reducer (503), a servo motor (504), and a mounting bracket (505). The mounting bracket (505) is fixedly installed inside the chassis (1). The hollow rotary table (502) is fixedly installed on the mounting bracket (505). The servo motor (504) is connected to the reducer (503). The output end of the reducer (503) is connected to the connecting flange (501). The connecting flange (501) is fixedly connected to the lower plate base (201).

5. The bearing cylindrical roller grinding device based on online electrolytic dressing technology according to claim 1, characterized in that: The slide module (4) further includes a guide rail (402), a handwheel (403) and a lead screw (404). The guide rail (402) is fixedly mounted on the gantry frame. The lead screw (404) is connected to the handwheel (403) and rotatably mounted on the gantry frame. The slide (401) is slidably mounted on the guide rail (402) and connected and cooperates with the lead screw (404). The mounting plate (304) is fixedly mounted on the slide (401).

6. A method for grinding cylindrical rollers of bearings based on online electrolytic dressing technology, characterized in that, This method is implemented using the bearing cylindrical roller grinding device based on online electrolytic dressing technology as described in any one of claims 1 to 5, and specifically includes the following processes: The cylindrical roller (8) is placed in the slot (2021) of the cage (202); the pressurizing device (3) presses down to contact the cylindrical roller (8) and applies a set load force to the cylindrical roller (8); the output parameters of the programmable pulse power supply are adjusted to the set value and the programmable pulse power supply is turned on; the electrolyte is injected along the injection port (3011) of the upper plate (301); finally, the rotary table assembly (5) is started. During grinding, the programmable pulse power supply generates pulse current through periodic start and stop to electrolyze the grinding wheel online; the rotary table assembly (5) drives the lower platen base (201) to rotate, and the cylindrical roller (8) rotates under the friction of the upper platen (301); at the same time, the lower platen base (201) rotates, the cam (302) contacts and engages with the cage (202), and combined with the action of the spring guide rod (203), the cage (202) together with the cylindrical roller (8) reciprocates radially on the lower platen base (201).

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