A sliding bearing outer circle grinding device

Abstract

This invention relates to the field of bearing grinding technology and discloses a grinding device for the outer diameter of sliding bearings. The device includes a vertical frame, a workpiece support and drive assembly, a grinding wheel assembly, an annular cooling mechanism, an annular draining mechanism, a side draining mechanism, and a laser detection mechanism. It achieves full-dimensional coverage of cooling and chip removal in the grinding area. Through the axial cooling and draining structure on the end face, combined with side-supplemented draining, it effectively solves the problems of insufficient cooling and chip residue during grinding, ensuring the stability of the grinding operation. It also enables real-time online precision monitoring of the grinding process, tracking the dimensional and positional accuracy of the workpiece's outer diameter throughout the process, effectively improving the grinding accuracy and finished product qualification rate of the sliding bearing's outer diameter. The core functional modules are rationally laid out, integrated and installed on a unified vertical frame, with strong synergy among the modules, enabling efficient continuous grinding of the sliding bearing's outer diameter.

Description

Technical Field

[0001] This invention relates to the field of bearing grinding technology, and more specifically to a sliding bearing external cylindrical grinding device. Background Technology

[0002] As a critical radial support component in rotating machinery, sliding bearings are widely used in numerous industrial fields such as precision machine tools, construction machinery, rail transportation, aerospace, and new energy power generation due to their smooth operation, high load-bearing capacity, and excellent vibration resistance. The machining accuracy, surface quality, and geometric tolerances of their outer cylindrical surfaces directly determine the assembly accuracy, operational reliability, and service life of the sliding bearing. The sliding bearing outer cylindrical grinding unit is a core process equipment specifically designed for the precision grinding of the outer cylindrical surface of sliding bearings. It is a key foundational piece of equipment for achieving high-precision, high-efficiency, and mass production of sliding bearings.

[0003] Existing technology discloses a bearing retainer external cylindrical grinding device and its working method (application number CN202311341098.2). It includes a bearing retainer body and a connecting base plate. The bearing retainer body is installed on one side of the top of the connecting base plate. A base plate groove is fixedly installed on the top of the connecting base plate away from the bearing retainer body, and a dust collection groove is connected to the top of the base plate groove via a sliding mechanism. A pull rod is fixedly installed in the middle of the outer wall of the base plate groove. A motor is placed on one side of the top of the dust collection groove, and an output rotating rod is installed in the middle of the top of the motor. The top of the output rotating rod passes through the bottom outer wall of a side baffle used for protecting waste chips, and then a grinding wheel for grinding the outer wall of the bearing retainer body is installed via a disassembly and assembly mechanism. During the grinding process, the use of the side baffle effectively blocks waste chips, reducing the likelihood of dust being inhaled by workers.

[0004] However, existing technologies, especially this particular solution, still have the following problems: The chip removal protection only adopts a passive chip blocking and dry dust collection structure, which cannot be adapted to the wet cooling process required for grinding sliding bearings. The coolant is not recycled in a directional manner and is prone to splashing and polluting the environment. The accumulation of chips can easily scratch the surface of the workpiece, and the grinding quality cannot be guaranteed. Without a dedicated cooling structure, grinding heat can easily cause thermal deformation of thin-walled sliding bearing workpieces, making it impossible to guarantee the dimensional accuracy and geometric tolerances of the outer circle of the workpiece, and thus failing to meet the processing requirements of precision sliding bearings. Without an online precision inspection mechanism for the grinding process, it can only inspect the workpiece precision offline and cannot correct grinding parameters in real time. This can easily lead to over-grinding or under-grinding, poor dimensional consistency in batch processing, and low production efficiency and finished product qualification rate. Summary of the Invention

[0005] The purpose of this invention is to provide a technical solution to address the problems in the prior art mentioned in the background section.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A sliding bearing external cylindrical grinding device includes: a vertical frame; The workpiece support drive assembly is located at the bottom of the vertical frame and is used to clamp, support, and drive the bearing workpiece to rotate. The grinding wheel assembly is positioned above the workpiece support drive assembly and is used to grind the outer diameter of the bearing workpiece from above. An annular cooling mechanism and an annular draining mechanism are provided together and located at both ends of the bearing workpiece, respectively. The annular cooling mechanism is used to spray coolant onto the grinding area of ​​the workpiece and grinding wheel assembly from the end face direction; The annular drainage mechanism is used to draw in chips and coolant generated during the grinding process from the end face. The side drainage mechanism is located on the side of the workpiece and is used to draw in the chips and coolant generated during the grinding process from the side. The laser inspection mechanism, mounted on a vertical frame and positioned to correspond to the axial and circumferential directions of the workpiece, is used to detect the dimensions, roundness, and cylindricity data of the outer circle of the bearing workpiece in real time.

[0007] Preferably, the annular cooling mechanism includes multiple sets of spray heads, which are arranged in a ring along the end face of the workpiece, and the spray direction of the spray heads is arranged along the axial direction of the workpiece; the annular drainage mechanism includes multiple sets of suction heads, which are arranged correspondingly to the multiple sets of spray heads, and the coolant sprayed by the spray heads is sucked up by the suction heads after passing through the grinding area.

[0008] Preferably, the annular cooling mechanism further includes an electromagnetic pulse valve group, which is connected to multiple sets of spray heads and is used to control the coolant to form a pulse spray; the electromagnetic pulse valve group can independently control the spray sequence of multiple sets of spray heads, so that the spray heads spray coolant into the grinding area in an alternating pulse manner.

[0009] Preferably, the side drainage mechanism includes two sets of suction hoods, which are respectively located close to both sides of the contact surface between the grinding wheel assembly and the workpiece grinding area.

[0010] Preferably, the suction hood is provided with a suction chamber, and the suction chamber is provided with an air intake and an air blowing port; there are two sets of air intakes, and the air blowing port is located between the two sets of air intakes. The two sets of air intakes are arranged at an angle and correspond to each other. The gas blown out by the air blowing port impacts the cutting fluid, so that the coolant is more effectively absorbed by the two sets of air intakes.

[0011] Preferably, the blowing intensity of the blowing port is greater than the suction intensity of the suction port, and the linear airflow ejected from the blowing port forms an anti-interference air curtain. Two laser beams symmetrical on both sides of the workpiece pass through the anti-interference air curtain, which is used to reduce the interference to the detection laser.

[0012] Preferably, the side drainage mechanism includes a mounting bracket, with telescopic push rods mounted on both sides of the mounting bracket. The suction hood is mounted on the mounting bracket via the telescopic push rods, which are used to adjust the distance between the suction hood and the bearing workpiece.

[0013] Preferably, the laser detection mechanism is configured as a through-beam laser detection sensor, which includes a detection laser head and a laser receiver. The detection laser head and laser receiver are located at both ends of the bearing workpiece and multiple sets are provided. The detection areas of two sets of detection laser heads and laser receivers cover both axial sides of the grinding area between the bearing workpiece and the grinding wheel assembly.

[0014] Preferably, the workpiece support drive assembly includes a roller seat and two sets of support rollers. The two sets of support rollers are rotatably mounted on the roller seat. Clamping push rods are installed at both ends of the roller seat. Support joints are rotatably installed at the telescopic ends of the clamping push rods. The two sets of support joints respectively support and clamp the two ends of the bearing workpiece. At the same time, the two sets of support joints can be adjusted to rotate simultaneously with the bearing workpiece. The vertical frame is also equipped with a feeding mechanism and two sets of drivers. One set of drivers is used to drive the rotation of the grinding wheel assembly, and the other set of drivers is used to drive the rotation of the support roller. The feeding mechanism is used to drive the grinding wheel assembly to move closer to or away from the workpiece.

[0015] Preferably, both ends of the roller seat are provided with mounting seats, which are used for mounting multiple sets of injection heads, suction heads, detection laser heads and laser receivers.

[0016] Technical effects and advantages of the present invention: The sliding bearing external cylindrical grinding device proposed in this invention has the following advantages compared with the prior art: This invention uses a workpiece support drive assembly to clamp, support, and rotate the bearing workpiece. A grinding wheel assembly performs grinding operations on the outer diameter of the workpiece from above. During the grinding process, annular cooling mechanisms and annular drainage mechanisms located at both ends of the workpiece work together to spray coolant into the grinding area from the end face, while simultaneously sucking up the chips and coolant generated during grinding. A side drainage mechanism on the side of the workpiece replenishes and sucks up the chips and coolant splashed during the grinding process. Throughout the process, a laser detection mechanism monitors the dimensions, roundness, and cylindricity data of the outer diameter of the workpiece in real time, providing real-time data for grinding accuracy control.

[0017] It achieves full-dimensional coverage of cooling and chip removal in the grinding area. Through the axial cooling and drainage structure on the end face, combined with side-supplemented drainage, it effectively solves the problems of insufficient cooling and chip residue during grinding, ensuring the stability of grinding operations. It realizes real-time online precision monitoring of the grinding process, which can track the size and positional accuracy of the workpiece's outer circle throughout the process, effectively improving the grinding accuracy and finished product qualification rate of the outer circle of the sliding bearing. The core functional modules are rationally laid out and integrated with a vertical frame as a unified basis. The modules have strong synergy and can efficiently complete the continuous grinding operation of the outer circle of the sliding bearing. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural schematic diagram of a sliding bearing external cylindrical grinding device according to the present invention; Figure 2 This is a front plan view of a sliding bearing external cylindrical grinding device according to the present invention; Figure 3 This is a side plan view of the external cylindrical grinding device for sliding bearings according to the present invention; Figure 4 This is a three-dimensional schematic diagram of the structure of the grinding wheel assembly, support roller, and bearing workpiece in an embodiment of the present invention; Figure 5 This is a side view of the structure including the grinding wheel assembly, support roller, and bearing workpiece in an embodiment of the present invention; Figure 6 For the present invention Figure 5 A magnified structural diagram of point A in the middle.

[0019] In the picture: 11. Vertical frame; 12. Workpiece support drive assembly; 13. Grinding wheel assembly; 14. Feed mechanism; 15. Driver; 16. Roller seat; 17. Support roller; 18. Clamping push rod; 19. Support joint; 21. Annular cooling mechanism; 22. Annular drainage mechanism; 23. Side drainage mechanism; 24. Laser detection mechanism; 25. Mounting base; 26. Spray head; 27. Suction head; 28. Suction hood; 29. ​​Suction chamber; 210. Air inlet; 211. Air outlet; 212. Mounting bracket; 213. Telescopic push rod. Detailed Implementation

[0020] The subject matter described herein will now be discussed with reference to exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and implement the subject matter described herein, and changes may be made to the function and arrangement of the elements discussed without departing from the scope of this specification. Various processes or components may be omitted, substituted, or added as needed in the examples. Furthermore, features described in some examples may be combined in other examples.

[0021] The invention provides, for example Figures 1 to 6 As shown, a sliding bearing external cylindrical grinding device includes: Vertical rack 11; The workpiece support drive assembly 12 is located at the bottom of the vertical frame 11 and is used to clamp, support and drive the bearing workpiece to rotate. The grinding wheel assembly 13 is positioned above the workpiece support drive assembly 12 and is used to grind the outer diameter of the bearing workpiece from above. The annular cooling mechanism 21 and the annular draining mechanism 22 are matched and located at both ends of the bearing workpiece, respectively. The annular cooling mechanism 21 is used to spray coolant onto the grinding area of ​​the workpiece and the grinding wheel assembly 13 from the end face direction; The annular drainage mechanism 22 is used to draw in the chips and coolant generated during the grinding process from the end face direction; The side drainage mechanism 23 is located on the side of the workpiece and is used to draw in the chips and coolant generated during the grinding process from the side. The laser inspection mechanism 24 is mounted on the vertical frame 11 and is set in the axial and circumferential directions corresponding to the workpiece. It is used to detect the dimensions, roundness and cylindricity data of the outer circle of the bearing workpiece in real time.

[0022] Working principle: The bearing workpiece is clamped, supported, and rotated by the workpiece support drive assembly 12, with the vertical frame 11 serving as the overall installation support base. The grinding wheel assembly 13 performs grinding operations on the outer circle of the workpiece from above. During the grinding process, the annular cooling mechanism 21 and the annular draining mechanism 22, located at both ends of the workpiece, work together to spray coolant into the grinding area from the end face, while simultaneously sucking up the chips and coolant generated during grinding. The side draining mechanism 23 on the side of the workpiece replenishes and sucks up the chips and coolant splashed during the grinding process. Throughout the process, the laser detection mechanism 24 detects the dimensions, roundness, and cylindricity data of the outer circle of the workpiece in real time, providing real-time data for grinding accuracy control.

[0023] It achieves full-dimensional coverage of cooling and chip removal in the grinding area. Through the axial cooling and drainage structure on the end face and the side supplementary drainage, it effectively solves the problems of insufficient cooling and chip residue during grinding, ensuring the stability of grinding operation. It realizes real-time online precision monitoring of the grinding process, which can track the size and positional accuracy of the outer circle of the workpiece throughout the process, effectively improving the grinding accuracy of the outer circle of the sliding bearing and the finished product qualification rate. The core functional modules are rationally laid out and integrated with the vertical frame 11 as a unified basis. The modules have strong synergy and can efficiently complete the continuous grinding operation of the outer circle of the sliding bearing.

[0024] In this scheme, at least multiple sets of through-beam laser detection sensors are arranged in a uniformly spaced ring array along the circumference of the workpiece; at least two sets of sensors are symmetrically arranged on both sides of the axial grinding contact surface between the grinding wheel assembly 13 and the workpiece, and the detection optical paths of the two sets of sensors cover the front and rear ends of the axial grinding area, which is used to monitor the dimensional changes of the grinding processing position in real time.

[0025] Regarding the axial delivery and recovery design of the coolant, this solution achieves precise temperature control and waste liquid recovery in the grinding area through a matching spray and suction structure. The annular cooling mechanism 21 includes multiple sets of spray heads 26, which are arranged in a ring along the end face of the workpiece, and the spray direction of the spray heads 26 is set along the axial direction of the workpiece; the annular drainage mechanism 22 includes multiple sets of suction heads 27, which are arranged correspondingly to the multiple sets of spray heads 26. The coolant sprayed by the spray heads 26 is sucked up by the suction heads 27 after passing through the grinding area.

[0026] It should be noted that, in order to improve the cooling effect while avoiding continuous splashing of coolant, this solution optimizes the coolant injection mode through pulse control logic and is equipped with an electromagnetic pulse valve group connected to multiple sets of injection heads 26. The annular cooling mechanism 21 also includes an electromagnetic pulse valve group, which is connected to multiple sets of injection heads 26 and is used to control the coolant to form a pulsed injection at a frequency of 10-20Hz and a pressure of 5-10MPa. The electromagnetic pulse valve assembly can independently control the spraying sequence of multiple spray heads 26, enabling the spray heads 26 to spray coolant into the grinding area in an alternating pulse manner. For radially splashed chips and coolant in the grinding area, this solution achieves thorough cleaning without dead angles through a double-sided suction structure. The side drainage mechanism 23 includes two suction hoods 28, which are respectively located close to both sides of the contact surface between the grinding wheel assembly 13 and the workpiece grinding area.

[0027] To optimize the side suction efficiency, this solution achieves a significant improvement in suction effect through a combined blowing and suction flow channel layout. The suction hood 28 is provided with a suction chamber 29, and the suction chamber 29 is provided with an air intake 210 and an air blowing port 211. There are two sets of air intakes 210, and the air blowing port 211 is located between the two sets of air intakes 210. The two sets of air intakes 210 are arranged at an angle and correspond to each other. The gas blown out by the air blowing port 211 impacts the cutting fluid, thereby making the coolant more effectively absorbed by the two sets of air intakes 210.

[0028] It is worth mentioning that the air-blowing structure in this solution has a dual function: it can both help improve the drainage efficiency and provide protection for the detection optical path. The linear airflow ejected from the air-blowing port 211 can form an anti-interference air curtain, providing a clean optical path environment for the detection laser. The air-blowing intensity of the air-blowing port 211 is greater than the air-suction intensity of the air-suction port 210. Specifically, the outlet pressure of the air-blowing port 211 is greater than the absolute value of the negative pressure of the air-suction port 210. The linear airflow ejected from the air-blowing port 211 forms an anti-interference air curtain. The two symmetrical laser beams on both sides of the workpiece pass through the anti-interference air curtain, which is used to reduce the interference received by the detection laser.

[0029] Considering the grinding adaptation requirements of bearing workpieces of different specifications, the installation position of the suction cover 28 is designed as an adjustable structure. The side drainage mechanism 23 is equipped with a mounting bracket 212 and a telescopic push rod 213, which can flexibly adjust the distance between the suction cover 28 and the workpiece. The side drainage mechanism 23 includes a mounting bracket 212, and telescopic push rods 213 are installed on both sides of the mounting bracket 212. The suction cover 28 is mounted on the mounting bracket 212 via the telescopic push rods 213, which are used to adjust the distance between the suction cover 28 and the bearing workpiece.

[0030] It should be clarified that the online detection system of this solution adopts a through-beam laser detection sensor to achieve real-time monitoring of the workpiece's shape and position parameters during the grinding process. Multiple sets of detection laser heads and laser receivers are respectively set at both ends of the workpiece, with the detection areas of two sets covering both axial sides of the grinding area. The laser detection mechanism 24 is configured as a through-beam laser detection sensor, which includes a detection laser head and a laser receiver. The detection laser head and laser receiver are set at both ends of the bearing workpiece, and multiple sets are provided. The detection areas of two sets of detection laser heads and laser receivers cover both axial sides of the grinding area between the bearing workpiece and the grinding wheel assembly 13.

[0031] The through-beam laser detection sensor used in this solution is a parallel beam laser displacement detection sensor. Each paired detection laser head can emit a sheet-like parallel laser beam parallel to the workpiece axis. The radial coverage of the laser beam is greater than the maximum designed outer diameter of the bearing workpiece. The corresponding laser receiver can completely receive the laser beam passing through the outside of the workpiece and output the received light flux data in real time.

[0032] Its core detection logic is as follows: the light flux and the outer diameter of the workpiece are calibrated in advance using standard gauge blocks to establish a linear correspondence between the light flux received by the laser receiver and the actual outer diameter of the workpiece; when the actual outer diameter of the bearing workpiece changes, the area of ​​the workpiece's outer diameter blocking the laser beam changes synchronously, and the light flux received by the laser receiver changes linearly accordingly. Through the calibrated correspondence, the actual radial dimension of the workpiece's outer diameter at the corresponding position of the detection optical path can be calculated in real time.

[0033] The specific implementation logic for detecting size, roundness, and cylindricity parameters is as follows: External diameter detection is achieved by using multiple sets of through-beam laser sensors arranged in a circumferential array to simultaneously acquire the radial dimensions of the workpiece at multiple circumferential positions within the same axial cross section. By calculating the average of multiple sets of data, the actual average outer diameter of the workpiece's outer diameter at that cross section is obtained, enabling real-time detection of the workpiece's dimensions. Among them, two sets of sensors covering both sides of the grinding area can acquire the workpiece dimensions at the grinding position in real time. When the dimension reaches the preset target processing dimension, a feedback signal can be immediately sent to stop the feed, fundamentally avoiding over-grinding and under-grinding problems.

[0034] Roundness detection is achieved by using multiple sets of sensors in a circumferential array to synchronously collect radial dimension data of the entire circumference of a workpiece for the same axial section. The actual center and the ideal circumference of the section are fitted using the least squares method. By calculating the maximum radial difference between the actual contour and the ideal circumference, the roundness error of the section can be obtained in real time, thus realizing online monitoring of the roundness of the workpiece.

[0035] Cylindricity detection is achieved by: an axial drive assembly is provided on the mounting base 25. The axial drive assembly adopts a micro servo motor and a ball screw structure, which can drive multiple sets of through-beam laser detection sensors to move back and forth at a constant speed along the axis of the workpiece. During the movement, the sensor group continuously collects the size and roundness data of multiple axial sections within the entire length of the workpiece at a preset sampling frequency. By performing three-dimensional fitting on the contour data of multiple sections, the cylindricity error of the entire length of the workpiece can be calculated, realizing online detection of the full form and position tolerance of the workpiece.

[0036] It is important to emphasize that the workpiece clamping stability and the grinding wheel feed accuracy are the core guarantees of grinding quality. This solution is equipped with a dedicated support drive and feed structure for this purpose. The workpiece support drive assembly 12 includes a roller seat 16 and two sets of support rollers 17. The two sets of support rollers 17 are rotatably mounted on the roller seat 16. Clamping push rods 18 are installed at both ends of the roller seat 16. Support joints 19 are rotatably mounted on the telescopic ends of the clamping push rods 18. The two sets of support joints 19 respectively support and clamp the two ends of the bearing workpiece. At the same time, the two sets of support joints 19 can rotate and adjust simultaneously with the bearing workpiece. The vertical frame 11 is also equipped with a feed mechanism 14 and two sets of drivers 15. One set of drivers 15 is used for the rotation drive of the grinding wheel assembly 13, and the other set of drivers 15 is used for the rotation drive of the support rollers 17. The feed mechanism 14 is used for the movement drive of the grinding wheel assembly 13 towards or away from the workpiece.

[0037] It is worth noting that the coaxiality of the installation of each functional component directly affects the working effect of the device. Both ends of the roller base 16 are provided with mounting seats 25, which are used for mounting multiple sets of injection heads 26, suction heads 27, detection laser heads, and laser receivers.

[0038] In summary, the present invention also has the following combined effects: It achieves precise temperature control and all-dimensional chip removal in the grinding area. Through the axially opposed jet-suction matching structure, combined with the pulsed alternating jet mode, it not only ensures the cooling effect of the grinding area, but also greatly reduces coolant splashing. The side drainage structure with the combination of blowing and suction on both sides achieves chip removal without dead corners in the grinding area, while significantly improving the efficiency of waste liquid and chip suction and recovery.

[0039] High-precision online detection of the grinding process is achieved. The dimensions, roundness and cylindricity data of the outer circle of the workpiece are monitored in real time by a through-beam laser detection sensor. At the same time, the anti-interference air curtain formed by the air blowing port 211 isolates the influence of coolant and chips on the optical path, effectively ensuring the accuracy of the detection data.

[0040] The device balances workpiece clamping stability with device adaptability. By using the support roller 17 in conjunction with the support joints 19 that are tightened at both ends, stable workpiece clamping and synchronous rotation are achieved. The adjustable suction cover 28 structure can adapt to bearing workpieces of different specifications, thus broadening the applicability of the device.

[0041] The integrated and high-precision installation of multifunctional components is achieved. The core components for cooling, drainage, and detection are uniformly integrated through the mounting seats 25 at both ends of the roller seat 16, which effectively ensures the coaxiality of the installation of each component and improves the overall operational stability and grinding accuracy of the device.

[0042] The embodiments of the present invention have been described above, but the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention, all of which are within the protection scope of the present invention.

Claims

1. A sliding bearing external cylindrical grinding device, characterized in that, include: Vertical rack (11); The workpiece support drive assembly (12) is located at the bottom of the vertical frame (11) and is used to clamp, support and drive the bearing workpiece to rotate. The grinding wheel assembly (13) is positioned above the workpiece support drive assembly (12) and is used to grind the outer diameter of the bearing workpiece from above. An annular cooling mechanism (21) and an annular draining mechanism (22) are provided together and located at both ends of the bearing workpiece, respectively; The annular cooling mechanism (21) is used to spray coolant onto the grinding area of ​​the workpiece and the grinding wheel assembly (13) from the end face direction; The annular drainage mechanism (22) is used to draw in the chips and coolant generated during the grinding process from the end face direction; The side drainage mechanism (23) is located on the side of the workpiece and is used to draw in the chips and coolant generated during the grinding process from the side. The laser inspection mechanism (24) is set on the vertical frame (11) and is set in the axial and circumferential directions corresponding to the workpiece. It is used to detect the dimensions, roundness and cylindricity data of the outer circle of the bearing workpiece in real time.

2. The sliding bearing external cylindrical grinding device according to claim 1, characterized in that, The annular cooling mechanism (21) includes multiple sets of spray heads (26), which are arranged in a ring along the end face of the workpiece, and the spray direction of the spray heads (26) is set along the axial direction of the workpiece; the annular draining mechanism (22) includes multiple sets of suction heads (27), which are arranged in a corresponding manner with the multiple sets of spray heads (26), and the coolant sprayed by the spray heads (26) is sucked by the suction heads (27) after passing through the grinding area.

3. The sliding bearing external cylindrical grinding device according to claim 2, characterized in that, The annular cooling mechanism (21) also includes an electromagnetic pulse valve group, which is connected to multiple sets of spray heads (26) and is used to control the coolant to form a pulse spray. The electromagnetic pulse valve group can independently control the spray sequence of multiple sets of spray heads (26) so that the spray heads (26) spray coolant into the grinding area in an alternating pulse manner.

4. The sliding bearing external cylindrical grinding device according to claim 1, characterized in that, The side drainage mechanism (23) includes two sets of suction hoods (28), which are located close to the contact surfaces of the grinding wheel assembly (13) and the workpiece grinding area.

5. The sliding bearing external cylindrical grinding device according to claim 4, characterized in that, The suction shroud (28) is provided with a suction chamber (29), and the suction chamber (29) is provided with an air intake (210) and an air blowing port (211). There are two sets of air intakes (210), and the air blowing port (211) is located between the two sets of air intakes (210). The two sets of air intakes (210) are arranged at an angle to each other. The gas blown out by the air blowing port (211) impacts the cutting fluid, so that the coolant is more effectively absorbed by the two sets of air intakes (210).

6. The sliding bearing external cylindrical grinding device according to claim 5, characterized in that, The blowing intensity of the blowing port (211) is greater than the suction intensity of the suction port (210). The linear airflow ejected from the blowing port (211) forms an anti-interference air curtain. Two laser beams symmetrical on both sides of the workpiece pass through the anti-interference air curtain, which is used to reduce the interference to the detection laser.

7. The sliding bearing external cylindrical grinding device according to claim 6, characterized in that, The side drainage mechanism (23) includes a mounting bracket (212), and telescopic push rods (213) are installed on both sides of the mounting bracket (212). The suction cover (28) is installed on the mounting bracket (212) through the telescopic push rods (213). The telescopic push rods (213) are used to adjust the distance between the suction cover (28) and the bearing workpiece.

8. The sliding bearing external cylindrical grinding device according to claim 1, characterized in that, The laser detection mechanism (24) is configured as a through-beam laser detection sensor. The through-beam laser detection sensor includes a detection laser head and a laser receiver. The detection laser head and laser receiver are located at both ends of the bearing workpiece and there are multiple sets of them. The detection areas of two sets of detection laser heads and laser receivers cover the axial sides of the grinding area of ​​the bearing workpiece and the grinding wheel assembly.

9. The sliding bearing external cylindrical grinding device according to claim 8, characterized in that, The workpiece support drive assembly (12) includes a roller seat (16) and two sets of support rollers (17). The two sets of support rollers (17) are rotatably mounted on the roller seat (16). Clamping push rods (18) are installed at both ends of the roller seat (16). Support joints (19) are rotatably mounted at the telescopic ends of the clamping push rods (18). The two sets of support joints (19) are respectively supported and clamped at both ends of the bearing workpiece. At the same time, the two sets of support joints (19) can be rotated and adjusted simultaneously with the bearing workpiece. The vertical frame (11) is also provided with a feeding mechanism (14) and two sets of drivers (15). One set of drivers (15) is used for the rotation drive of the grinding wheel assembly (13), and the other set of drivers (15) is used for the rotation drive of the support roller (17). The feeding mechanism (14) is used for the movement drive of the grinding wheel assembly (13) towards or away from the workpiece.

10. A sliding bearing external cylindrical grinding device according to claim 9, characterized in that, Both ends of the roller seat (16) are provided with mounting seats (25), which are used for mounting multiple sets of injection heads (26), suction heads (27), detection laser heads and laser receivers.

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