Grinding machine and method for machining inner ring raceway of thrust self-aligning roller bearing

Abstract

This invention discloses a grinding machine and method for machining the inner ring raceway of a thrust self-aligning roller bearing, belonging to the field of engineering machinery technology. It includes a machine tool guide rail, with a workpiece positioning module slidably mounted at one end for positioning and clamping the workpiece, and a movable seat slidably mounted at the other end. A fixed box is fixedly connected to the top of the movable seat, and a drive assembly is installed inside the fixed box. Through the coordinated operation of the guide channel, diversion mechanism, and conveying mechanism at the spindle center, coolant can be precisely delivered to the outlet of the grinding wheel body via a rotary joint, guide channel, connecting pipe, ring pipe, insertion pipe, and confluence channel. This achieves directional and thorough spraying of the contact area between the grinding wheel and the raceway, quickly removing the instantaneous high temperature of grinding, preventing burns, metallographic changes, and micro-thermal cracks on the raceway surface, and significantly improving the surface quality, wear resistance, and fatigue life of the bearing inner ring raceway.

Description

Technical Field

[0001] This invention relates to the field of engineering machinery technology, specifically to a grinding machine and method for machining the raceway of the inner ring of a thrust self-aligning roller bearing. Background Technology

[0002] Thrust self-aligning roller bearings can withstand heavy axial loads and certain radial loads, and have self-aligning compensation functions. They are widely used in heavy-duty working conditions such as metallurgy, mining, wind power, and heavy machinery. The contour accuracy, surface roughness, and dimensional consistency of the inner ring spherical raceway directly determine the bearing's rotational accuracy, load life, and operating noise. Grinding is the core process for the precision machining of this part.

[0003] Traditional grinding machines mostly use ordinary external cooling methods, which makes it difficult for the coolant to accurately and fully enter the grinding contact area between the grinding wheel and the raceway spherical surface. As a result, the instantaneous high temperature in the grinding area cannot be removed in time, which can easily cause burns on the raceway surface, changes in metallographic structure and micro-thermal cracks, directly reducing the wear resistance and fatigue life of the bearing. Therefore, in order to solve the above problems, an improved grinding machine for machining the inner ring raceway of thrust self-aligning roller bearings has been proposed. Summary of the Invention

[0004] The purpose of this invention is to provide a grinding machine and method for machining the inner ring raceway of a thrust self-aligning roller bearing, which solves the problems mentioned in the background art through the coordinated operation of the guide channel, the flow splitting mechanism and the conveying mechanism at the spindle center.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a grinding machine for machining the inner ring raceway of a thrust self-aligning roller bearing, including a machine tool guide rail, wherein a workpiece positioning module for positioning and clamping the workpiece is slidably mounted at one end of the machine tool guide rail; A movable seat is slidably mounted on the other end of the machine tool guide rail. A fixed box is fixedly connected to the top of the movable seat. A drive assembly is installed inside the fixed box. A spindle is fixedly connected to the power output end of the drive assembly. A grinding wheel body is detachably mounted on one end of the spindle through the fixed box and by fasteners. The grinding wheel body is connected to the spindle with a flow-dividing mechanism. The spindle has a flow-guiding channel adapted to the flow-dividing mechanism along its axis. The other end of the spindle is rotatably connected to a rotary joint through a rotary sealing structure. The end of the rotary joint away from the spindle is connected to a conveying mechanism for supplying coolant to the flow-guiding channel.

[0006] Preferably, the diversion mechanism includes an annular tube coaxially sleeved at the connection end between the main shaft and the grinding wheel body. A plurality of connecting tubes are uniformly fixed circumferentially on the inner side of the annular tube. The end of the connecting tube away from the annular tube is connected to the guide channel in the main shaft. A plurality of insert tubes are uniformly fixed circumferentially on the outer wall of the annular tube near the grinding wheel body. The insert tubes and connecting tubes correspond one-to-one and are interconnected.

[0007] Preferably, the flow distribution mechanism further includes several liquid outlets formed on the surface of the grinding wheel body and corresponding to the raceway machining area. An annular confluence channel is formed inside the grinding wheel body at the position of the liquid outlet. An insertion hole is formed on the end face of the grinding wheel body near the spindle at the position of each insertion tube. The end of the insertion tube away from the annular tube can be inserted into the corresponding insertion hole, and the insertion hole is connected to the annular confluence channel, so that the coolant in the flow channel passes through the connecting pipe, the annular pipe, the insertion tube, the insertion hole, and the annular confluence channel in sequence and is then sprayed out from the liquid outlet.

[0008] Preferably, the conveying mechanism includes a liquid storage tank fixedly disposed on the outside of the fixed box, a water pump fixedly installed on the top of the liquid storage tank, the suction port of the water pump being connected to the inside of the liquid storage tank through a suction conduit, the delivery port of the water pump being connected to a delivery pipe, and the end of the delivery pipe away from the water pump penetrating the side wall of the fixed box and being sealed to the end of the rotary joint away from the main shaft.

[0009] Preferably, a limiting frame is rotatably connected to the fixed end surface of the rotary joint, and the bottom of the limiting frame is fixedly connected to the bottom of the inner cavity of the fixed box by bolts, which is used to limit and fix the rotary joint.

[0010] Preferably, the drive assembly includes a stepper motor fixedly installed on the upper end of the inner cavity of the fixed box. The output end of the stepper motor is connected to a transmission assembly. The end of the transmission assembly away from the stepper motor is fixedly connected to the surface of the spindle, and is used to drive the spindle to drive the grinding wheel body to rotate synchronously.

[0011] Preferably, the outer side of the workpiece clamping opening of the workpiece positioning module is provided with a protective cover for dust and chip prevention, and a telescopic cover is detachably installed between the lower end of the workpiece positioning module and the two sides facing the moving seat. The telescopic cover is used to cover the exposed part of the machine tool guide rail.

[0012] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention provides a grinding machine for machining the inner ring raceway of a thrust self-aligning roller bearing. Through the coordinated operation of the guide channel, the flow splitting mechanism, and the conveying mechanism at the center of the spindle, the coolant can be precisely delivered to the outlet of the grinding wheel body via a rotary joint, guide channel, connecting pipe, ring pipe, insertion pipe, and confluence channel. This achieves directional and thorough spraying of the contact area between the grinding wheel and the raceway, which can quickly remove the instantaneous high temperature of grinding, avoid burns, changes in metallographic structure, and micro-thermal cracks on the raceway surface, and significantly improve the surface quality, wear resistance, and fatigue life of the bearing inner ring raceway.

[0013] 2. The directional spray coolant of this invention can simultaneously flush out the iron filings and abrasive grains generated during grinding, preventing the chips from accumulating in the raceway grooves and clamping gaps, avoiding scratches on the machined surface and blockage of the grinding wheel pores, effectively extending the service life of the grinding wheel and ensuring the stability of grinding accuracy.

[0014] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures pointed out in the description and the drawings. Attached Figure Description

[0015] Figure 1 This is a schematic front view of the overall structure of the present invention; Figure 2 This is a rear view schematic diagram of the overall structure of the present invention; Figure 3 This is a schematic diagram of the fixed box and movable seat structure of the present invention; Figure 4 This is a schematic cross-sectional view of the spindle structure of the present invention. Figure 5 This is a schematic diagram of the ring tube, connecting tube, and insertion tube structure of the present invention; Figure 6 This is a schematic cross-sectional view of the main structure of the grinding wheel of the present invention; Figure 7 This is a cross-sectional schematic diagram of the grinding wheel main structure of the present invention.

[0016] The following are the labeling elements in the diagram: 1. Machine tool guide rail; 2. Workpiece positioning module; 3. Moving seat; 4. Fixed box; 5. Drive assembly; 51. Stepper motor; 52. Transmission assembly; 6. Spindle; 7. Grinding wheel body; 8. Diverting mechanism; 81. Ring pipe; 82. Connecting pipe; 83. Insertion pipe; 84. Liquid outlet; 85. Annular confluence channel; 86. Insertion hole; 9. Guide channel; 10. Rotary joint; 11. Conveying mechanism; 111. Liquid storage tank; 112. Water pump; 113. Conveying pipe; 12. Limiting frame; 13. Protective cover; 14. Telescopic cover. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] This invention provides, for example Figures 1-7The grinding machine shown includes a machine tool guide rail 1. A workpiece positioning module 2 for positioning and clamping the workpiece is slidably installed at one end of the machine tool guide rail 1. The workpiece positioning module 2 can slide and adjust its position along the machine tool guide rail 1 to adapt to the clamping requirements of different specifications of thrust self-aligning roller bearing inner rings. A movable seat 3 is slidably installed at the other end of the machine tool guide rail 1. The movable seat 3 can slide along the machine tool guide rail 1 to adjust the distance between the grinding wheel body 7 and the workpiece to adapt to the needs of different processing conditions.

[0019] The top of the movable base 3 is fixedly connected to the fixed box 4. The fixed box 4 is equipped with a drive component 5. The drive component 5 provides stable power for the rotation of the grinding wheel body 7. The power output end of the drive component 5 is fixedly connected to the spindle 6. The spindle 6 passes through the fixed box 4 and extends to the outside of the fixed box 4. The grinding wheel body 7 is detachably installed on it by fasteners. The fasteners can be standardized parts such as bolts and nuts, which facilitates the disassembly, replacement and maintenance of the grinding wheel body 7. The grinding wheel body 7 is used to grind the inner ring raceway of the bearing.

[0020] A flow-dividing mechanism 8 is provided at the connection end between the grinding wheel body 7 and the spindle 6. The flow-dividing mechanism 8 is used to evenly distribute the coolant to each outlet 84 of the grinding wheel body 7. A guide channel 9 adapted to the flow-dividing mechanism 8 is opened at the center of the spindle 6 along its axis. The guide channel 9 provides a channel for the delivery of coolant, so that the coolant can be delivered to the flow-dividing mechanism 8 along the axis of the spindle 6. The other end of the spindle 6 is rotatably connected to a rotary joint 10 through a rotary sealing structure. The rotary sealing structure can ensure that the coolant does not leak during the rotation of the spindle 6. The rotary joint 10 is used to connect the delivery mechanism 11 and the spindle 6 to achieve stable delivery of coolant without affecting the normal rotation of the spindle 6. The end of the rotary joint 10 away from the spindle 6 is connected to a delivery mechanism 11 for supplying coolant to the guide channel 9.

[0021] When the equipment is working, the inner ring of the thrust self-aligning roller bearing is first positioned and clamped by the workpiece positioning module 2. The positions of the workpiece positioning module 2 and the moving seat 3 on the machine tool guide rail 1 are adjusted so that the grinding wheel body 7 is aligned with the workpiece raceway processing area. The drive component 5 is started, which drives the spindle 6 to rotate. The spindle 6 synchronously drives the grinding wheel body 7 to rotate at high speed, realizing the grinding of the inner ring raceway of the workpiece. At the same time, the conveying mechanism 11 is started, which conveys the coolant to the rotary joint 10. The coolant enters the guide channel 9 in the center of the spindle 6 through the rotary joint 10. The guide channel 9 conveys the coolant to the distribution mechanism 8. The distribution mechanism 8 evenly distributes the coolant and then conveys it to the grinding wheel body 7. Finally, the coolant is sprayed onto the grinding contact area through the outlet 84 of the grinding wheel body 7 to achieve cooling and chip removal. During the processing, the position of the moving seat 3 can be adjusted according to the processing requirements to ensure grinding accuracy. The sliding setting of the workpiece positioning module 2 and the moving seat 3 can flexibly adapt to the processing requirements of workpieces of different specifications.

[0022] Through the coordinated operation of the machine tool guide rail 1, workpiece positioning module 2, moving seat 3, fixed box 4, drive assembly 5, spindle 6, grinding wheel body 7, flow splitting mechanism 8, flow guiding channel 9, rotary joint 10, and conveying mechanism 11, the problems of unreasonable overall structure and poor cooling and chip removal effect of traditional grinding machines are solved. The cooperation between the rotary joint 10 and the rotary sealing structure realizes the leakage-free delivery of coolant without affecting the normal rotation of the spindle 6. The cooperation between the flow splitting mechanism 8 and the flow guiding channel 9 ensures the precise delivery of coolant, thereby improving the machining accuracy and reliability of the grinding machine.

[0023] The flow distribution mechanism 8 includes an annular tube 81 coaxially sleeved at the connection end between the spindle 6 and the grinding wheel body 7. The annular tube 81 is coaxially arranged with the spindle 6 to ensure that the coolant can be evenly distributed. Several connecting tubes 82 are evenly fixed on the inner circumference of the annular tube 81. The number of connecting tubes 82 can be set according to actual processing requirements, usually 4-8, to ensure that the coolant is evenly distributed. The end of the connecting tube 82 away from the annular tube 81 is connected to the guide channel 9 in the spindle 6, so that the coolant in the guide channel 9 can smoothly enter the connecting tube 82. Several insert tubes 83 are evenly fixed on the outer wall of the annular tube 81 near the grinding wheel body 7. The insert tubes 83 correspond one-to-one with the connecting tubes 82 and are interconnected. The number of insert tubes 83 is the same as that of the connecting tubes 82, ensuring that the coolant in each connecting tube 82 can be delivered to a corresponding insert tube 83, thereby achieving precise distribution of coolant.

[0024] When the coolant is delivered to the distribution mechanism 8 through the guide channel 9 of the spindle 6, it first enters several connecting pipes 82 inside the ring pipe 81. Since the connecting pipes 82 are evenly distributed circumferentially inside the ring pipe 81 and are connected to the guide channel 9, the coolant will form a uniform pressure distribution in the ring pipe 81. Then, through the insertion pipes 83 corresponding to the connecting pipes 82, the coolant is evenly delivered to the insertion holes 86 of the grinding wheel body 7, and then enters the confluence channel of the grinding wheel body 7, providing a uniform liquid flow basis for the subsequent precise spraying of coolant to the grinding contact area, ensuring that the coolant flow rate of each outlet 84 is consistent, and achieving uniform cooling.

[0025] This flow distribution mechanism 8 achieves uniform coolant distribution through the coordinated operation of the ring pipe 81, connecting pipe 82, and insert pipe 83, solving the problems of uneven coolant distribution and insufficient local cooling in traditional cooling methods. The ring pipe 81 is coaxially arranged with the spindle 6, and the connecting pipe 82 and insert pipe 83 are evenly distributed circumferentially, ensuring that the coolant can be evenly distributed to all areas of the grinding wheel body 7. The connecting pipe 82 and insert pipe 83 correspond one-to-one and are interconnected, reducing the resistance in the coolant delivery process, ensuring smooth coolant delivery, and further improving the stability and reliability of the cooling system.

[0026] The diversion mechanism 8 also includes several liquid outlets 84 disposed on the surface of the grinding wheel body 7 and corresponding to the grinding wheel machining area. The position, number, and angle of the liquid outlets 84 are designed according to the structure of the grinding wheel body 7 and the position of the grinding wheel machining area to ensure that the liquid outlets 84 can be accurately aligned with the grinding contact area between the grinding wheel and the workpiece, so that the coolant can be directly sprayed onto the high-temperature grinding area. An annular confluence channel 85 is provided inside the grinding wheel body 7 corresponding to the position of the liquid outlets 84. The annular confluence channel 85 is connected to all the liquid outlets 84 and is used to collect the coolant delivered by the insertion tube 83. The coolant is then evenly distributed to each outlet 84. The end face of the grinding wheel body 7 near the spindle 6 is provided with insertion holes 86 corresponding to the positions of each insertion tube 83. The size of the insertion hole 86 is adapted to the insertion tube 83. The end of the insertion tube 83 away from the ring tube 81 can be inserted into the corresponding insertion hole 86, which facilitates the disassembly and replacement of the grinding wheel body 7. The insertion hole 86 is connected to the annular confluence channel 85, so that the coolant in the guide channel 9 passes through the connecting pipe 82, the ring tube 81, the insertion tube 83, the insertion hole 86, and the annular confluence channel 85 in sequence before being sprayed out from the outlet 84, forming a complete coolant delivery path.

[0027] After the coolant is delivered to the insertion hole 86 of the grinding wheel body 7 through the insertion tube 83, it enters the annular confluence channel 85. The annular confluence channel 85 collects the coolant. Since the annular confluence channel 85 is connected to all the outlets 84 and the outlets 84 are corresponding to the grinding area of ​​the raceway, the coolant will form a uniform pressure in the annular confluence channel 85. Then, it will be precisely sprayed onto the grinding contact area between the grinding wheel and the workpiece through each outlet 84, so as to achieve directional and precise cooling of the grinding area. At the same time, the high-speed sprayed coolant will wash away the iron filings and abrasive grains generated during the grinding process in time, so as to avoid the accumulation of chips. When it is necessary to replace the grinding wheel body 7, simply pull the grinding wheel body 7 away from the spindle 6 to pull the insertion tube 83 out of the insertion hole 86 to complete the disassembly of the grinding wheel body 7. The operation is convenient.

[0028] The delivery and spraying effect of the coolant has been further optimized, solving the problem that the coolant cannot accurately reach the grinding contact area in the traditional cooling method. The outlet 84 is set to correspond to the raceway machining area, realizing the directional spraying of coolant, which can quickly remove the instantaneous high temperature of grinding, avoid burns, changes in metallographic structure and micro-thermal cracks on the raceway surface, and improve the surface quality of the raceway. The setting of the annular confluence channel 85 ensures that the coolant can be evenly distributed to each outlet 84, ensuring the consistency of the cooling effect.

[0029] The conveying mechanism 11 includes a liquid storage tank 111 fixedly installed on the outside of the fixed box 4. The liquid storage tank 111 is used to store coolant, and its capacity can be designed according to processing requirements to facilitate coolant replenishment. A water pump 112 is fixedly installed on the top of the liquid storage tank 111. The water pump 112 provides power for the delivery of coolant, ensuring that the coolant can be continuously and stably delivered to the guide channel 9. The suction port of the water pump 112 is connected to the inside of the liquid storage tank 111 through a suction pipe, which extends to the bottom of the liquid storage tank 111 to ensure that the coolant can be delivered to the bottom of the liquid storage tank 111. The coolant in the storage tank 111 is fully drawn out, and the delivery port of the water pump 112 is connected to the delivery pipe 113. The delivery pipe 113 is made of corrosion-resistant and high-strength pipe to prevent coolant from corroding the pipe or causing coolant leakage due to pipe damage. The end of the delivery pipe 113 away from the water pump 112 passes through the side wall of the fixed box 4 and is sealed to the end of the rotary joint 10 away from the main shaft 6. The sealing connection can be made by using components such as sealing gaskets and sealing rings to ensure that there is no leakage during the coolant delivery process, while not affecting the normal operation of the rotary joint 10.

[0030] When cooling is required, water pump 112 is started. Water pump 112 draws coolant from storage tank 111 through suction pipe. After being pressurized by water pump 112, it is delivered to rotary joint 10 through delivery pipe 113. Since delivery pipe 113 and rotary joint 10 are sealed together, coolant will not leak. Rotary joint 10 is rotatably connected to spindle 6. During the high-speed rotation of spindle 6, rotary joint 10 remains fixed to ensure that coolant can stably enter the guide channel 9 in the center of spindle 6, providing continuous and stable power support for subsequent coolant diversion and spraying, and realizing the circulation supply of coolant.

[0031] The sealed connection between the delivery pipe 113 and the rotary joint 10 prevents coolant leakage, saves coolant, protects internal components from coolant corrosion, and improves the stability and service life of the equipment.

[0032] The fixed end surface of the rotary joint 10 is rotatably connected to the limiting frame 12. The limiting frame 12 adopts a rigid structure and has good support performance. The bottom of the limiting frame 12 is fixedly connected to the bottom of the inner cavity of the fixed box 4 by bolts. The bolt connection method facilitates the disassembly, assembly and adjustment of the limiting frame 12, which is used to limit and fix the rotary joint 10, ensuring that the rotary joint 10 always maintains a fixed position during operation and does not shift or shake.

[0033] During equipment operation, the spindle 6 rotates at high speed, causing the rotating end of the rotary joint 10 to rotate synchronously. The fixed end of the rotary joint 10 is fixed to the bottom of the inner cavity of the fixed box 4 by the limiting frame 12. The limiting frame 12 provides limiting support for the fixed end of the rotary joint 10, preventing the rotary joint 10 from shifting, shaking, or axially moving under the influence of coolant delivery pressure and spindle 6 rotation. This ensures the connection stability between the rotary joint 10 and the spindle 6 and the delivery pipe 113, thereby ensuring the stable delivery of coolant and not affecting the normal processing of the equipment.

[0034] The drive assembly 5 includes a stepper motor 51 fixedly installed on the upper end of the inner cavity of the fixed box 4. The stepper motor 51 has the characteristics of high precision, stable speed and fast response, and can accurately control the rotation speed and angle of the spindle 6, which is suitable for high-precision raceway machining requirements. The output end of the stepper motor 51 is connected to a transmission assembly 52. ​​The transmission assembly 52 can adopt gear transmission, belt transmission or chain transmission, etc., with gear transmission being preferred to ensure stable power transmission and no slippage. The end of the transmission assembly 52 away from the stepper motor 51 is fixedly connected to the surface of the spindle 6, which is used to transmit the power of the stepper motor 51 to the spindle 6, driving the spindle 6 to drive the grinding wheel body 7 to rotate synchronously.

[0035] During processing, the stepper motor 51 is started. According to the instructions of the control system, the stepper motor 51 outputs the corresponding speed and angle, and transmits the power to the spindle 6 through the transmission component 52. Since the transmission component 52 is fixedly connected to the surface of the spindle 6, the spindle 6 will rotate synchronously under the drive of the stepper motor 51, thereby driving the grinding wheel body 7 to rotate at high speed, realizing the grinding of the inner ring raceway of the workpiece. The precise control of the stepper motor 51 can flexibly adjust the rotation speed of the grinding wheel body 7 according to the processing requirements, ensuring grinding accuracy and meeting the processing requirements of raceways with different specifications and different precision requirements.

[0036] The outer side of the workpiece clamping port of the workpiece positioning module 2 is equipped with a protective cover 13 for dust and chip prevention. The protective cover 13 is made of transparent or semi-transparent material, which makes it easy for operators to observe the processing situation. At the same time, it can effectively block the chips, dust and splashed coolant generated during the grinding process, preventing them from entering the workpiece clamping port, preventing the workpiece surface from being scratched, and ensuring the workpiece processing accuracy. A telescopic cover 14 is detachably installed between the lower end of the workpiece positioning module 2 and the two sides facing the moving seat 3. The telescopic cover 14 is made of a telescopic flexible material and can extend and retract with the relative movement of the workpiece positioning module 2 and the moving seat 3. The telescopic cover 14 is used to cover the exposed part of the machine tool guide rail 1, preventing chips, dust and coolant from entering the sliding gap of the machine tool guide rail 1, preventing guide rail wear and jamming, and ensuring the sliding accuracy and service life of the guide rail.

[0037] During the grinding process, the protective cover 13 is placed on the outside of the workpiece clamping opening to isolate the workpiece from the outside environment, blocking the chips, dust and splashed coolant generated during grinding, preventing them from adhering to the workpiece surface or entering the workpiece clamping gap, ensuring the stability of workpiece positioning and machining accuracy. The telescopic cover 14 is connected between the workpiece positioning module 2 and the moving seat 3. When the workpiece positioning module 2 or the moving seat 3 slides along the machine tool guide rail 1, the telescopic cover 14 extends and retracts accordingly, always covering the exposed part of the machine tool guide rail 1, preventing chips, dust and coolant from entering the sliding gap of the guide rail, avoiding problems such as wear and jamming of the guide rail, and ensuring the normal sliding of the guide rail.

[0038] The problem of dust, chips, and coolant affecting the equipment and workpiece during processing has been solved. The protective cover 13 effectively protects the surface quality of the workpiece, prevents it from being scratched, and ensures processing accuracy. At the same time, it makes it easier for operators to observe the processing situation. The telescopic cover 14 protects the machine tool guide rail 1, prevents wear and jamming of the guide rail, extends the service life of the guide rail, and ensures the sliding accuracy of the equipment.

[0039] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A grinding machine for machining the raceway of the inner ring of a thrust self-aligning roller bearing, characterized in that: Includes a machine tool guide rail (1), and a workpiece positioning module (2) for positioning and clamping the workpiece is slidably installed at one end of the machine tool guide rail (1). The other end of the machine tool guide rail (1) is slidably mounted with a movable seat (3), and a fixed box (4) is fixedly connected to the top of the movable seat (3). A drive assembly (5) is provided inside the fixed box (4). A spindle (6) is fixedly connected to the power output end of the drive assembly (5). One end of the spindle (6) passes through the fixed box (4) and a grinding wheel body (7) is detachably installed by fasteners. The grinding wheel body (7) is connected to the spindle (6) with a flow divider (8). The spindle (6) has a flow guide channel (9) adapted to the flow divider (8) along its axis. The other end of the spindle (6) is rotatably connected to a rotary joint (10) through a rotary sealing structure. The end of the rotary joint (10) away from the spindle (6) is connected to a conveying mechanism (11) for supplying coolant to the flow guide channel (9).

2. The grinding machine for machining the inner ring raceway of a thrust self-aligning roller bearing according to claim 1, characterized in that: The diversion mechanism (8) includes an annular tube (81) coaxially sleeved at the connection end between the main shaft (6) and the grinding wheel body (7). A number of connecting tubes (82) are uniformly fixed on the inner side of the annular tube (81). The end of the connecting tube (82) away from the annular tube (81) is connected to the guide channel (9) inside the main shaft (6). A number of insert tubes (83) are uniformly fixed on the outer wall of the annular tube (81) near the grinding wheel body (7). The insert tubes (83) correspond one-to-one with the connecting tubes (82) and are interconnected.

3. The grinding machine for machining the inner ring raceway of a thrust self-aligning roller bearing according to claim 2, characterized in that: The diversion mechanism (8) also includes several outlets (84) on the surface of the grinding wheel body (7) and corresponding to the raceway processing area. An annular confluence channel (85) is provided inside the grinding wheel body (7) at the position of the outlet (84). An insertion hole (86) is provided on the end face of the grinding wheel body (7) near the spindle (6) at the position of each insertion tube (83). The end of the insertion tube (83) away from the annular tube (81) can be inserted into the corresponding insertion hole (86). The insertion hole (86) is connected to the annular confluence channel (85), so that the coolant in the guide channel (9) passes through the connecting pipe (82), the annular tube (81), the insertion tube (83), the insertion hole (86), and the annular confluence channel (85) in sequence and is then sprayed out from the outlet (84).

4. The grinding machine for machining the inner ring raceway of a thrust self-aligning roller bearing according to claim 3, characterized in that: The conveying mechanism (11) includes a storage tank (111) fixedly installed on the outside of the fixed box (4). A water pump (112) is fixedly installed on the top of the storage tank (111). The suction port of the water pump (112) is connected to the inside of the storage tank (111) through a suction conduit. The delivery port of the water pump (112) is connected to a delivery pipe (113). The end of the delivery pipe (113) away from the water pump (112) passes through the side wall of the fixed box (4) and is sealed to the end of the rotary joint (10) away from the main shaft (6).

5. The grinding machine for machining the inner ring raceway of a thrust self-aligning roller bearing according to claim 4, characterized in that: The fixed end surface of the rotary joint (10) is rotatably connected to a limiting frame (12), and the bottom of the limiting frame (12) is fixedly connected to the bottom of the inner cavity of the fixed box (4) by bolts, which is used to limit and fix the rotary joint (10).

6. The grinding machine for machining the inner ring raceway of a thrust self-aligning roller bearing according to claim 5, characterized in that: The drive assembly (5) includes a stepper motor (51) fixedly installed on the upper end of the inner cavity of the fixed box (4). The output end of the stepper motor (51) is connected to a transmission assembly (52). The end of the transmission assembly (52) away from the stepper motor (51) is fixedly connected to the surface of the spindle (6) and is used to drive the spindle (6) to drive the grinding wheel body (7) to rotate synchronously.

7. The grinding machine for machining the inner ring raceway of a thrust self-aligning roller bearing according to claim 6, characterized in that: The workpiece positioning module (2) has a protective cover (13) for dust and chip prevention on the outer side of the workpiece clamping port. A telescopic cover (14) is detachably installed between the lower end of the workpiece positioning module (2) and the two sides facing the moving seat (3). The telescopic cover (14) is used to cover the exposed part of the machine tool guide rail (1).

8. A method of using a grinding machine for machining the raceway of the inner ring of a thrust self-aligning roller bearing, characterized in that, The grinding machine used for machining the inner ring raceway of the thrust self-aligning roller bearing as described in claim 7 includes the following steps: S1: First, the inner ring workpiece of the thrust self-aligning roller bearing is positioned and clamped by the workpiece positioning module (2). The positions of the workpiece positioning module (2) and the moving seat (3) on the machine tool guide rail (1) are adjusted so that the grinding wheel body (7) is aligned with the workpiece raceway machining area. S2: Start the drive assembly (5), the drive assembly (5) drives the spindle (6) to rotate, the spindle (6) synchronously drives the grinding wheel body (7) to rotate at high speed, so as to realize the grinding process of the inner ring raceway of the workpiece; S3: Start the conveying mechanism (11). The conveying mechanism (11) delivers the coolant to the rotary joint (10). The coolant enters the guide channel (9) in the center of the spindle (6) through the rotary joint (10). The guide channel (9) delivers the coolant to the diversion mechanism (8). The diversion mechanism (8) distributes the coolant evenly and delivers it to the grinding wheel body (7). Finally, the coolant is sprayed from the outlet (84) of the grinding wheel body (7) to the grinding contact area to achieve cooling and chip removal.

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