Positive pressure anti-pollution and pneumatic locking plunger piston shoe end face machining device

Abstract

The invention discloses a positive-pressure anti-pollution and pneumatic-locking plunger piston shoe end face machining device, and relates to the technical field of plunger pump plunger assembly finish machining. The positive-pressure anti-pollution and pneumatic-locking plunger piston shoe end face machining device comprises a positioning assembly and a dustproof assembly; the positioning assembly comprises an abutting mechanism and a plurality of workpiece placing positions located on the periphery of the abutting mechanism, the abutting mechanism comprises a jacking device and an elastic clamping seat located on the periphery of the jacking device, the elastic clamping seat comprises a plurality of abutting clamping jaws used for corresponding to the workpiece placing positions, and the abutting clamping jaws can diffuse towards the workpiece placing positions when the jacking device rises; the dust removal assembly comprises an air source base located below the positioning assembly, and the air source base is provided with a first air channel used for being communicated with the workpiece containing position so that clean air can enter the plunger cavity to be machined. And radial synchronous locking of a plurality of plungers to be machined and cleaning of tiny particles can be achieved.

Description

Technical Field

[0001] This invention relates to the field of precision machining technology for plunger pump plunger assemblies, specifically to a plunger slipper end face machining device with positive pressure anti-contamination and pneumatic locking. Background Technology

[0002] With the rapid development of national infrastructure, the demand for hydraulic components, especially hydraulic pumps, in construction machinery has increased dramatically. The swashplate-slipper pair is a core component of hydraulic pumps, particularly axial piston pumps. The slipper slides on the swashplate surface, driving the piston to compress hydraulic fluid, providing a continuous power source for the construction machinery.

[0003] In a swashplate axial piston pump, several piston assemblies (7, 9, or 11 pieces, the number per group depending on the design) are grouped together. Within each group, the slipper flange thickness must be consistent, as must the surface roughness, parallelism, and flatness. This ensures uniform force exerted by the pressure plate on the slipper, reducing impact on the slipper surface and the pressure plate. Uneven slipper positional accuracy during operation will create gaps, causing abrupt changes during oil pressure and return switching, resulting in vibration and noise during operation. It will also accelerate wear on the pistons, piston balls, slipper flanges, slipper sockets, and swashplate, affecting the pump's quietness and service life, leading to substandard volumetric efficiency and overall performance degradation. Therefore, precision machining of the slipper end faces of the piston assemblies is necessary to ensure that the aforementioned precision and consistency requirements are met.

[0004] The current tooling process for finishing the slipper end face of the plunger assembly has two problems. First, the tiny particles generated during the processing enter the gap between the plunger and slipper mating surfaces and the interior of the product, which are difficult to clean, resulting in poor product cleanliness and affecting the service life of the finished product. Second, when finishing the slipper end face, the product is locked by manual threading or elastic retaining ring clamping, which is unreliable and has low work efficiency. Summary of the Invention

[0005] This application provides a positive pressure anti-pollution and pneumatic locking plunger slipper end face processing device, which can solve the problem in the prior art that when processing the plunger slipper end face, small particles can easily enter the plunger-slipper mating surface of the plunger assembly, affecting the service life of the finished product. At the same time, when finishing the slipper end face, the use of manual thread clamping or elastic retaining ring to tighten the plunger and slipper is inefficient.

[0006] This application provides a positive pressure anti-pollution and pneumatic locking plunger slipper end face processing device, including: A positioning component, comprising a clamping mechanism and a plurality of workpiece placement positions located on the outer periphery of the clamping mechanism, wherein the clamping mechanism comprises a lifting device and an elastic retainer located on the outer periphery of the lifting device, wherein the elastic retainer comprises a plurality of clamping claws corresponding to the workpiece placement positions, and the clamping claws can spread toward the workpiece placement positions when the lifting device is raised. A dustproof component, comprising an air source base located below the positioning component, wherein the air source base has a first air passage for communicating with the workpiece placement position so that clean gas can enter the plunger cavity to be processed.

[0007] In one embodiment, the positioning component further includes a positioning seat, the workpiece placement position extending longitudinally through the positioning seat, the workpiece placement position including a slipper placement hole located on the upper surface of the positioning seat and a plunger placement hole located below the slipper placement hole.

[0008] In one embodiment, the bottom of the positioning seat is provided with a mounting hole for fitting the elastic card seat, the elastic card seat includes an annular base, and the clamping claw is circumferentially disposed on the upper surface of the inner ring of the annular base.

[0009] In one embodiment, the clamping claw includes a vertical plate and a horizontal claw located on the outer side of the top of the vertical plate.

[0010] In one embodiment, the inner wall of one end of the horizontal claw connected to the vertical plate is provided with an adapting arc surface for matching the telescopic end of the lifting device, and the adapting arc surface protrudes from the inner wall of the vertical plate. The far end of the horizontal claw away from the vertical plate is provided with an inclined surface for adapting to the neck position shape of the plunger to be processed.

[0011] In one embodiment, the lifting device includes a cylinder seat located below the positioning seat, a lifting cylinder located in the middle of the cylinder seat, and a pusher column sleeved outside the telescopic end of the lifting cylinder. The pusher column passes through the annular base and abuts against the inner wall of the clamping claw when the lifting cylinder is raised to push the clamping claw to spread circumferentially.

[0012] In one embodiment, the cylinder seat is further provided with a second air passage for connecting the first air passage and the workpiece placement position. The second air passage includes an annular groove located at the bottom of the cylinder seat and an airflow hole located above the annular groove and connected to the annular groove at its bottom. There are multiple airflow holes, and each airflow hole corresponds to one workpiece placement position.

[0013] In one embodiment, the air source base is located at the bottom of the cylinder seat, and the interior of the air source base is hollow to form a pressure buffer chamber. The first air passage includes a main air outlet located at the top of the pressure buffer chamber and corresponding to the position of the annular groove.

[0014] In one embodiment, the air source base is further provided with an air inlet that communicates with the air pressure buffer chamber.

[0015] In one embodiment, the air source base is further provided with a cylinder inlet and a cylinder outlet for providing power to the lifting device.

[0016] The beneficial effects of the technical solutions provided in this application include: 1. Clean gas is continuously introduced into the plunger cavity to be processed through the gas source base and the first air channel to form a positive pressure environment, which effectively prevents the tiny particles generated during the processing from entering the plunger-slipper mating surface, avoids wear and failure caused by contamination, and significantly improves the service life and reliability of the finished product. 2. The lifting device drives multiple clamping jaws of the elastic clamping seat to expand outward synchronously, which can quickly lock the plunger assembly on all workpiece placement positions on the outer periphery at one time. This replaces the traditional inefficient manual thread clamping or clamping method, realizing rapid clamping. It is especially suitable for mass production, and the production efficiency is significantly improved. At the same time, the locking action is uniformly driven by the lifting device, which not only simplifies the operation and avoids uneven clamping force caused by human factors, but also the design of the elastic clamping seat can provide uniform radial clamping force, effectively preventing scratches or deformation of the workpiece surface, and ensuring the stability and workpiece quality of subsequent finishing and cleaning processes. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A cross-sectional view of a positive pressure anti-pollution and pneumatic locking plunger slipper end face machining device provided in this application embodiment; Figure 2 A cross-sectional view of the positioning seat in a positive pressure anti-pollution and pneumatic locking plunger slipper end face machining device provided in an embodiment of this application; Figure 3 A schematic diagram of the elastic seat structure in a positive pressure anti-pollution and pneumatic locking plunger slipper end face processing device provided in this application embodiment; Figure 4 A schematic diagram of the lifting cylinder structure in a positive pressure anti-pollution and pneumatic locking plunger slipper end face processing device provided in this application embodiment; Figure 5A schematic diagram of the cylinder seat structure in a positive pressure anti-pollution and pneumatic locking plunger slipper end face machining device provided in this application embodiment; Figure 6 A bottom view of the cylinder seat in a positive pressure anti-pollution and pneumatic locking plunger slipper end face machining device provided in an embodiment of this application; Figure 7 This is a schematic diagram of the air source base structure in a positive pressure anti-pollution and pneumatic locking plunger slipper end face processing device provided in an embodiment of this application.

[0019] In the diagram: 1. Workpiece placement position; 101. Slipper placement hole; 102. Plunger placement hole; 2. Lifting device; 201. Cylinder seat; 202. Lifting cylinder; 203. Pushing column; 204. Annular groove; 205. Airflow hole; 3. Elastic seat; 301. Clamping jaw; 3011. Vertical plate; 3012. Horizontal jaw; 302. Annular base; 4. Air source base; 401. Main air outlet; 402. Air inlet; 403. Cylinder air inlet; 404. Cylinder air outlet; 5. First air passage; 6. Positioning seat; 601. Mounting hole. Detailed Implementation

[0020] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0021] This application provides a positive pressure anti-pollution and pneumatic locking plunger slipper end face processing device, which can solve the problem in the prior art that when processing the plunger slipper end face, small particles can easily enter the plunger-slipper mating surface of the plunger assembly, affecting the service life of the finished product. At the same time, when finishing the slipper end face, the use of manual thread clamping or elastic retaining ring to tighten the plunger and slipper is inefficient.

[0022] The plunger slipper end face processing device in this application includes a positioning component and a dustproof component. The positioning component can simultaneously limit and lock the plunger end and slipper end of the plunger to be processed, which facilitates the fine processing of the slipper end face. The dustproof component can send clean gas from the bottom into the plunger cavity of the plunger to be processed after the plunger to be processed is locked, and finally flow out from the assembly gap between the plunger and the slipper and the small hole in the center of the slipper (if any).

[0023] Specifically, Figure 1 A cross-sectional view of a positive pressure anti-pollution and pneumatic locking plunger slipper end face machining device provided in this application embodiment, as shown below. Figure 1 As shown, the positioning component includes a clamping mechanism. Multiple workpiece placement positions 1 are equidistantly arranged around the periphery of the clamping mechanism. Each workpiece placement position 1 is used to place a plunger to be processed. The clamping mechanism can simultaneously clamp multiple plungers to be processed after placement. The clamping mechanism includes a lifting device 2 and an elastic seat 3 located around the periphery of the lifting device 2. The elastic seat 3 includes clamping claws 301 arranged circumferentially. Each clamping claw 301 corresponds to a plunger to be processed. The lifting device 2 is provided in the middle of the elastic seat 3. When the lifting device 2 is raised, it presses the end face of the clamping claws 301 facing the lifting device 2, forcing the clamping claws 301 to move outward circumferentially to clamp the plunger to be processed in the workpiece placement position 1.

[0024] The dustproof component includes an air source base 4 located below the positioning component. The air source base 4 is connected to an external air source and has a first air passage 5. The first air passage 5 connects to each workpiece placement position 1 so that the high-pressure cleaning gas provided by the external air source flows into the workpiece placement position 1 and enters the plunger cavity of the plunger to be processed. Finally, it flows out from the assembly gap between the plunger and the slipper and the small hole in the center of the slipper (if any) to blow out the fine particles.

[0025] Specifically, the positioning component also includes a positioning base 6. Figure 2 A cross-sectional view of the positioning seat 6 in a positive pressure anti-pollution and pneumatic locking plunger slipper end face machining device provided in this application embodiment, as shown below. Figure 2 As shown, in one possible implementation, the positioning seat 6 is preferably a frustum structure, and a plurality of workpiece placement positions 1 are circumferentially equidistantly arranged on the positioning seat 6 and longitudinally penetrate the positioning seat 6. The workpiece placement position 1 is used to conform to the shape of the plunger to be processed, and includes a slipper placement hole 101 and a plunger placement hole 102. The slipper placement hole 101 is located on the top surface of the positioning seat 6, and it is an annular structure that protrudes from the upper surface of the positioning seat 6 to keep the slipper end of the plunger to be processed in a horizontal state. The plunger placement hole 102 is located below the slipper placement hole to keep the plunger end of the plunger to be processed in a vertical state.

[0026] Furthermore, the bottom of the positioning seat 6 is provided with a mounting hole 601 for fitting the elastic card seat 3 to set the elastic card seat 3. The top of the mounting hole 601 is connected to the workpiece placement position 1 so that the clamping claw 301 in the elastic card seat 3 can directly enter the workpiece placement position 1 to hold the plunger to be processed.

[0027] Figure 3 A schematic diagram of the elastic seat 3 in a positive pressure anti-pollution and pneumatic locking plunger slipper end face processing device provided in this application embodiment is shown below. Figure 3As shown, the elastic card holder 3 includes an annular base 302, which includes an inner ring and an outer ring. The diameter of the outer ring is smaller than the inner diameter of the mounting hole 601 of the positioning seat 6, so as to be embedded in the mounting hole 601. The clamping claw 301 is circumferentially arranged on the upper surface of the inner ring of the annular base 302 to enter the positioning seat 6. The clamping claw 301 includes a vertical plate 3011 and a horizontal claw 3012 located on the outer side of the top of the vertical plate 3011. The vertical plate 3011 has a certain length and is preferably made of a material with a certain amount of deformation and automatic reset performance, so that the horizontal claw 3012 at the top can expand outward to form a trumpet shape under the push of the lifting device 2. After the thrust of the lifting device 2 disappears, the horizontal claw 3012 will automatically return to its position. The clamping claw 301 has an inverted L-shaped structure, and the bottom of the L-shaped structure is connected to the inner ring of the annular base 302 to form an integral part. The top of the L-shaped structure extends away from the center.

[0028] Furthermore, in conjunction with the above description, when the lifting device 2 is raised, it needs to pass through the annular base 302 and abut against the inner wall of the horizontal claw 3012 to compress the horizontal claw 3012 to move outward circumferentially. Therefore, in order to ensure smooth docking between the two, the inner wall of one end of the horizontal claw 3012 connected to the vertical plate 3011 is provided with an adapting arc surface for matching the telescopic end of the lifting device 2. In order to realize that the lifting device 2 pushes the horizontal claw 3012 to spread circumferentially after passing through the annular base 302, in this case, the adapting arc surface protrudes from the inner wall of the vertical plate 3011 so that the diameter of the circle formed by the adapting arc surfaces of the inner walls of multiple horizontal claws 3012 is smaller than the outer diameter of the telescopic end of the lifting device 2. The far end of the horizontal claw 3012 away from the vertical plate 3011 is provided with an inclined surface for matching the neck position shape of the plunger to be processed. That is to say, the end of the horizontal claw 3012 is sharp to abut against the shoulder and neck of the plunger to be processed.

[0029] Furthermore, Figure 4 A schematic diagram of the lifting cylinder 202 in a positive pressure anti-pollution and pneumatic locking plunger slipper end face machining device provided in this application embodiment is shown below. Figure 4As shown, the lifting device 2 includes a cylinder seat 201 located below the positioning seat 6. The cylinder seat 201 is also configured as a frustum structure, and its diameter is equal to that of the positioning seat 6. It is connected to the bottom of the positioning seat 6 via a connector. A lifting cylinder 202 is located at the center of the cylinder seat 201. The bottom of the cylinder seat 201 has an installation space for installing the lifting cylinder 202. The fixed end of the lifting cylinder 202 is located in the installation space. The telescopic end of the lifting cylinder 202 extends upward through the surface of the cylinder seat 201 and enters the inner ring of the elastic retainer 3. The telescopic end of the lifting cylinder 202 itself has a small diameter and cannot withstand the elastic... The inner wall of the clamping claw 301 of the card holder 3 is such that, in this case, a pusher 203 is sleeved on the outer periphery of the telescopic end of the lifting cylinder 202. The outer diameter of the pusher 203 is larger than the diameter of the circle formed by the matching arc surfaces of the inner walls of the multiple horizontal claws 3012. Specifically, an annular pad is fixedly sleeved on the outer periphery of the telescopic end of the lifting cylinder 202. The annular pad can support the pusher 203. The pusher 203 is set on the annular pad. In one possible embodiment, in order to ensure the smooth outward expansion of the clamping claw 301, the pusher 203 is set as a cone shape, and its diameter gradually increases from the top to the middle.

[0030] Furthermore, Figure 5 A schematic diagram of the cylinder seat 201 in a positive pressure anti-pollution and pneumatic locking plunger slipper end face machining device provided in this application embodiment. Figure 6 A bottom view of the cylinder seat 201 in a positive pressure anti-pollution and pneumatic locking plunger slipper end face machining device provided in this application embodiment, as shown below. Figure 5 , Figure 6 As shown, the cylinder seat 201 is also provided with a second air passage for connecting the first air passage 5 and the workpiece placement position 1. The first air passage 5 is located on the bottom air source base 4, and the second air passage is located on the middle cylinder seat 201. The two are directly connected and finally connected to the workpiece placement position 1. Specifically, the second air passage includes an annular groove 204 located at the bottom of the cylinder seat 201 and several airflow holes 205. The annular groove 204 is an incomplete annular structure, which is directly opposite the first air passage 5 on the air source base 4. The airflow holes 205 are... 05 is arranged on the flow path of the annular groove 204. The number of airflow holes 205 is equal to the number of workpiece placement positions 1, so that there is an airflow hole 205 below each workpiece placement position 1. One end of the airflow hole 205 is connected to the annular groove 204, and the other end is connected to the corresponding workpiece placement position 1. The clean gas flowing out from the first air passage 5 first enters the annular groove 204, then flows to each airflow hole 205, and finally reaches the workpiece placement position 1 and the plunger to be processed placed in the workpiece placement position 1.

[0031] Furthermore, the gas source base 4 is located at the bottom of the entire device, and the clean gas flows from bottom to top. The interior of the gas source base 4 is hollow to form a pressure buffer chamber. The high-pressure clean gas from the outside is first buffered in the pressure buffer chamber, and then flows to the second air passage through the first air passage 5.

[0032] Furthermore, Figure 7 A schematic diagram of the air source base 4 in a positive pressure anti-pollution and pneumatic locking plunger slide end face processing device provided in this application embodiment is shown below. Figure 7 As shown, the first air passage 5 includes a total air outlet 401 located at the top of the air pressure buffer chamber. In this application, the total air outlet 401 can be one or more, and its number is not specifically limited in this application. However, the total air outlet 401 must correspond to the position of the annular groove 204 to ensure that the clean gas flowing out from the total air outlet enters the annular groove 204.

[0033] Furthermore, the air source base 4 is also provided with an air inlet 402 that communicates with the air pressure buffer chamber. An adapter is provided on the air inlet 402 for communicating with an external air source device. The air source base 4 is also provided with a cylinder air inlet 403 and a cylinder air outlet 404 for providing power to the lifting device 2. Both the cylinder air inlet 403 and the cylinder air outlet 404 are provided with connecting pipes, which are connected to the cylinder of the lifting device 2 to deliver the driving gas into the lifting device 2.

[0034] The working mechanism of the positive pressure anti-pollution and pneumatic locking plunger slipper end face machining device in this application is as follows: Multiple plungers to be processed are placed in workpiece placement position 1, with the plunger ends of the plungers to be processed vertically positioned in plunger placement holes 102 and the slipper ends of the plungers to be processed horizontally positioned in slipper placement holes 101, ensuring the reference alignment of the plungers to be processed. Then, the extension end of the lifting cylinder 202 is controlled to extend, so that the outer periphery of the pushing column 203 abuts against the matching arc surface of the horizontal claw 3012, forcing the horizontal claw 3012 to expand outward and press against the shoulder and neck of the plunger to be processed, thereby locking the current posture of the plunger to be processed, which is convenient for subsequent slipper finishing. Then, the external air source device is activated, and high-pressure cleaning gas first enters the air pressure buffer chamber, then passes through the main air outlet 401, the annular groove 204, the air flow hole 205, and the workpiece placement position 1 in sequence, and finally enters the plunger cavity of the plunger to be processed. Finally, it flows out from the assembly gap between the plunger and the slipper and the small hole in the center of the slipper (if any), to blow out the small particles and complete the cleaning.

[0035] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0036] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0037] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A positive pressure anti-pollution and pneumatic locking plunger slide end face processing device, characterized in that, include: The positioning component includes a clamping mechanism and a plurality of workpiece placement positions (1) located on the outer periphery of the clamping mechanism. The clamping mechanism includes a lifting device (2) and an elastic bracket (3) located on the outer periphery of the lifting device (2). The elastic bracket (3) includes a plurality of clamping claws (301) corresponding to the workpiece placement positions (1), and the clamping claws (301) can spread toward the workpiece placement positions (1) when the lifting device (2) is raised. The dustproof component includes an air source base (4) located below the positioning component. The air source base (4) has a first air passage (5) for communicating with the workpiece placement position (1) so that clean gas can enter the plunger cavity to be processed.

2. The positive pressure anti-pollution and pneumatic locking plunger slipper end face processing device as described in claim 1, characterized in that: The positioning component also includes a positioning seat (6), the workpiece placement position (1) extends longitudinally through the positioning seat (6), the workpiece placement position (1) includes a slipper placement hole (101) located on the upper surface of the positioning seat (6) and a plunger placement hole (102) located below the slipper placement hole (101).

3. The positive pressure anti-pollution and pneumatic locking plunger slipper end face processing device as described in claim 2, characterized in that: The positioning seat (6) has an installation hole (601) at the bottom for fitting the elastic card seat (3). The elastic card seat (3) includes an annular base (302), and the clamping claw (301) is circumferentially disposed on the upper surface of the inner ring of the annular base (302).

4. The positive pressure anti-pollution and pneumatic locking plunger slipper end face processing device as described in claim 3, characterized in that: The clamping claw (301) includes a vertical plate (3011) and a horizontal claw (3012) located on the outer side of the top of the vertical plate (3011).

5. The positive pressure anti-pollution and pneumatic locking plunger slipper end face processing device as described in claim 4, characterized in that: The inner wall of one end of the horizontal claw (3012) connected to the vertical plate (3011) is provided with an adaptable arc surface for matching the telescopic end of the lifting device, and the adaptable arc surface protrudes from the inner wall of the vertical plate (3011). The far end of the horizontal claw (3012) away from the vertical plate (3011) is provided with an inclined surface for matching the neck position shape of the plunger to be processed.

6. The positive pressure anti-pollution and pneumatic locking plunger slipper end face processing device as described in claim 3, characterized in that: The lifting device (2) includes a cylinder seat (201) located below the positioning seat (6), a lifting cylinder (202) located in the middle of the cylinder seat (201), and a pusher (203) sleeved on the telescopic end of the lifting cylinder (202). The pusher (203) passes through the annular base (302) and abuts against the inner wall of the clamping claw (301) when the lifting cylinder (202) is raised to push the clamping claw (301) to spread circumferentially.

7. The positive pressure anti-pollution and pneumatic locking plunger slipper end face processing device as described in claim 6, characterized in that: The cylinder seat (201) is also provided with a second air passage for connecting the first air passage (5) and the workpiece placement position (1). The second air passage includes an annular groove (204) located at the bottom of the cylinder seat (201) and an airflow hole (205) located above the annular groove (204) and connected to the annular groove (204) at its bottom. There are multiple airflow holes (205), and each airflow hole (205) corresponds to a workpiece placement position (1).

8. The positive pressure anti-pollution and pneumatic locking plunger slipper end face processing device as described in claim 7, characterized in that: The air source base (4) is located at the bottom of the cylinder seat (201). The air source base (4) is hollow inside to form a pressure buffer chamber. The first air passage (5) includes a main air outlet (401) located at the top of the pressure buffer chamber and corresponding to the position of the annular groove (204).

9. The positive pressure anti-pollution and pneumatic locking plunger slipper end face processing device as described in claim 8, characterized in that: The air source base (4) is also provided with an air inlet (402) that communicates with the air pressure buffer chamber.

10. The positive pressure anti-pollution and pneumatic locking plunger slipper end face processing device as described in claim 1, characterized in that: The air source base (4) is also provided with a cylinder inlet (403) and a cylinder outlet (404) for providing power to the lifting device (2).

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