Ultra-precise full-static-pressure double-head grinding machine

Abstract

The invention relates to the technical field of grinding machines, and discloses an ultra-precise full-static-pressure double-head grinding machine which comprises a grinding machine body, a transmission transverse shaft, a transmission longitudinal shaft, grinding mechanisms, a support shell, a locking assembly and the like. Two sets of end face and inner hole grinding mechanisms are symmetrically arranged on the two sides of an air floating support of the grinding machine, the two ends of a workpiece can be synchronously machined, and the turning-around clamping link is omitted; the machining efficiency is improved, meanwhile, secondary clamping errors are avoided, machining consistency and workpiece quality are guaranteed, the two sets of clamps clamp the two ends of a workpiece respectively, a buffer mechanism between the two sets of clamps is composed of a buffer block and an elastic coupling assembly, and transmission of abnormal shaking at one end to the other end can be effectively weakened; a locking structure on the side of the clamp can fix the other end in time and enhance stability when shaking occurs, in addition, the air floating assembly reduces high-speed rotation abrasion and obstructs vibration transmission between the clamp and the support in a non-contact supporting mode, and the grinding machine achieves efficient and stable machining through structural innovation and remarkably improves machining safety and reliability.

Description

Technical Field

[0001] The present invention relates to the technical field of grinding machines, and particularly to an ultra-precision hydrostatic double-head grinding machine. Background Art

[0002] Most grinding machines use a high-speed rotating grinding wheel for grinding. The grinding wheel is composed of abrasive grains and a binder, and the abrasive grains have various shapes and are irregularly distributed. Each abrasive grain is equivalent to a cutting tooth. When the grinding wheel rotates at a high speed, the abrasive grains generate cutting, extrusion, and rubbing and polishing effects on the workpiece surface, thereby realizing the grinding of the workpiece surface and achieving the purpose of improving the surface quality and dimensional accuracy of the workpiece.

[0003] In the invention patent with the publication number of CN119407552A, the invention discloses an ultra-precision double-head spindle with full hydrostatic pressure, which relates to the technical field of machine tool spindles. It includes a core shaft, an outer surface of the core shaft is fixedly connected with a bushing, an outer surface of the bushing is rotatably connected with a main spindle equipment box body, one side of the outer surface of the bushing is fixedly connected with a synchronous pulley, a transmission component is drivingly connected to the synchronous pulley, a belt cover is sleeved outside the synchronous pulley, the belt cover is fixedly connected inside the main spindle equipment box body, and a loosening abnormal warning mechanism of the transmission component is arranged inside the belt cover. When the transmission component becomes loose, it can automatically trigger an alarm to remind the staff. It can not only reduce the situation that the core shaft fails due to the sudden situation of the transmission component falling off and breaking, thereby reducing the maintenance cost of the core shaft and prolonging the service life of the core shaft, but also avoid the situation that the core shaft vibrates and makes noise when working under abnormal conditions of the transmission component, ensuring the stability of the core shaft during operation, thereby improving the grinding accuracy and quality of the core shaft for products.

[0004] In the prior art, in order to maintain the consistency of the processing at both ends of the workpiece, a double-head spindle is provided and applied to a grinding machine to clamp and fix the workpiece. Usually, one clamping mechanism is used to clamp the workpiece. Even if two clamping mechanisms are used to clamp both ends, the two clamping mechanisms are usually rigidly connected. In view of the above and related prior arts, the inventor believes that the following defects often exist: there is no buffer mechanism between the two rigidly connected clamping mechanisms. When one end of the workpiece has abnormal jitter due to insufficient lubrication or foreign object blockage during grinding, the vibration and impact force will be transmitted along the workpiece and the clamping mechanism to the other end. At this time, the workpiece is still rotating at a high speed, which is extremely likely to cause the grinding tool at the other end in close contact with it to be damaged by the impact, posing a certain safety hazard and increasing the maintenance cost. Summary of the Invention

[0005] The technical problem to be solved by the present invention is that in the prior art, when one end of the workpiece has an abnormality, the impact will affect the other end and it is easy to cause the tool to break. Therefore, we propose an ultra-precision hydrostatic double-head grinding machine.

[0006] To achieve the above object, the present application adopts the following technical solution: a super-precision full-static pressure double-head grinding machine, comprising: a grinding machine bed body, on the top of which a driving horizontal shaft and a driving vertical shaft are installed, the driving horizontal shaft and the driving vertical shaft are vertically arranged, on the top of the driving vertical shaft an end face grinding mechanism is installed, there are two groups of the end face grinding mechanisms symmetrically arranged with respect to the vertical central axis of the driving horizontal shaft, on the top of the driving vertical shaft an inner hole grinding mechanism is also installed, the inner hole grinding mechanism is arranged on the side of the end face grinding mechanism, and there are two groups of the inner hole grinding mechanisms symmetrically arranged with respect to the vertical central axis of the driving horizontal shaft; On the top of the driving horizontal shaft a support housing is installed, inside the support housing a mounting ring is fixedly connected, coaxially arranged inside the mounting ring is a locking assembly, the locking assembly includes a fixing ring, at one end of the fixing ring a first clamping assembly is installed, and at the other end of the fixing ring a second clamping assembly is installed, outside the first clamping assembly a pneumatic floating assembly is sleeved, and the pneumatic floating assembly is used for pneumatic floating support of the first clamping assembly; Inside the fixing ring two groups of follower rotating rings are symmetrically arranged, inside the follower rotating rings a number of locking pins are installed, on the inner wall of the fixing ring a number of jacks are opened, and the jacks and the locking pins correspond one by one, between the two groups of follower rotating rings a number of buffer blocks and elastic coupling assemblies are arranged, and the buffer blocks and the elastic coupling assemblies are arranged at intervals.

[0007] Preferably, the two groups of follower rotating rings are symmetrically arranged with respect to the vertical central axis of the fixing ring, one group of follower rotating rings is fixedly connected to the first clamping assembly, and the other group of follower rotating rings is fixedly connected to the second clamping assembly.

[0008] Preferably, vibration sensors are installed inside both the first clamping assembly and the second clamping assembly, the vibration sensor inside the first clamping assembly is used for transmitting signals to the locking pins inside the follower rotating ring on the side close to the second clamping assembly, and the vibration sensor inside the second clamping assembly is used for transmitting signals to the locking pins inside the follower rotating ring on the side close to the first clamping assembly.

[0009] Preferably, the locking pins are arranged in an annular array with respect to the outer wall of the follower rotating ring, a silica gel ball is embedded at the output end of the follower rotating ring, and the silica gel ball is rotatably connected to the locking pin.

[0010] Preferably, the jack includes a guiding part and a locking part, the locking part is arranged at the end of the guiding part, and the locking part is communicated with the guiding part, the guiding part is arranged in a horn shape that gradually contracts from the outside to the inside, and the connection between the guiding part and the locking part is rounded.

[0011] Preferably, the elastic coupling assembly includes a driving coupling, a driving chuck is fixedly connected to the end of the driving coupling, a driven chuck is snap-connected to the side of the driving chuck, and an elastic plum blossom pad is arranged between the driving chuck and the driven chuck. One side of the elastic plum blossom pad is fixedly connected to the driving chuck, and the other side of the elastic plum blossom pad is fixedly connected to the driven chuck. A driven coupling is fixedly connected to the side of the driven chuck away from the driving chuck.

[0012] Preferably, the air-floating assembly includes a pressure equalizing ring, the pressure equalizing ring is fixedly connected to the inside of the mounting ring, a pressure equalizing cavity is formed inside the pressure equalizing ring, an air inlet pipe is fixedly connected to the side of the pressure equalizing ring, and the air inlet pipe is communicated with the pressure equalizing cavity.

[0013] Preferably, a porous ring is coaxially arranged inside the pressure equalizing ring, and the porous ring is fixedly connected to the pressure equalizing ring. A plurality of pores communicating with the pressure equalizing cavity are uniformly distributed inside the porous ring, and the porous ring is fixedly connected to the end of the fixed ring.

[0014] Preferably, a synchronous pulley is sleeved outside the second clamping assembly, and the synchronous pulley is fixedly connected to the second clamping assembly. The synchronous pulley is fixedly connected to one end of the fixed ring away from the porous ring.

[0015] Preferably, the first clamping assembly and the second clamping assembly are coaxially arranged. A shaft sleeve workpiece is inserted into the first clamping assembly, and the shaft sleeve workpiece penetrates through the second clamping assembly.

[0016] The technical effects and advantages of the present invention: 1. In the present invention, two groups of end face grinding mechanisms and inner hole grinding mechanisms are symmetrically arranged on both sides of the air-floating bracket, which can simultaneously process both ends of the workpiece synchronously, saving the intermediate process of turning around and re-clamping, facilitating the improvement of processing efficiency. And the synchronous processing at both ends is conducive to ensuring the consistency of processing at both ends, reducing the situation of inconsistent processing at both ends caused by errors in secondary clamping, etc., and thus facilitating the improvement of the quality of the workpiece.

[0017] 2. In the present invention, double groups of jigs are used to clamp both ends of the workpiece respectively, and the two groups of jigs are connected by a buffer mechanism, and locking structures are arranged on the sides of the jigs. When abnormal vibration occurs at one end of the workpiece, the other end can be locked and fixed in time. The buffer mechanism can weaken the transmission of vibration from one end to the other end, and at the same time the locking structure can enhance the stability of the fixation of the other end. The two cooperate with each other to minimize the adverse impact on the other end when problems occur at one end during the double-head synchronous processing of the workpiece, and at the same time improve the safety performance. And an air-floating assembly is provided, and the air-floating support method is adopted, which can not only reduce the wear during high-speed rotation, but also make the first clamping assembly and the entire bracket adopt a non-contact support method, which can reduce the transmission of vibration between the jig and the entire bracket. Brief Description of the Drawings

[0018] The disclosure of the present invention will be described with reference to the accompanying drawings. It should be understood that the drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present invention. In the drawings, the same reference numerals are used to refer to the same components: Figure 1 is a three-dimensional structural schematic diagram of the whole of the present invention; Figure 2 is a top-view structural schematic diagram of the whole of the present invention; Figure 3 is a three-dimensional structural schematic diagram of the air-floating support part of the present invention; Figure 4 is a sectional structural schematic diagram of the air-floating support part of the present invention; Figure 5 is a three-dimensional structural schematic diagram of the elastic coupling assembly and the locking assembly part of the present invention; Figure 6 is a three-dimensional structural schematic diagram of the elastic coupling assembly part of the present invention; Figure 7 is a sectional structural schematic diagram of the locking assembly part of the present invention; Figure 8 is a sectional structural schematic diagram of the air-floating assembly part of the present invention; Figure 9 is a sectional structural schematic diagram of the first clamping assembly part of the present invention.

[0019] Legend Explanation: 1. Grinding machine bed; 2. Transmission horizontal shaft; 3. Air-floating assembly; 4. Bracket housing; 5. Elastic coupling assembly; 6. Locking assembly; 7. First clamping assembly; 8. Second clamping assembly; 9. Installation ring; 10. Sleeve workpiece; 11. Transmission vertical shaft; 12. End face grinding mechanism; 13. Inner hole grinding mechanism; 14. Synchronous pulley; 15. Buffer block; 301. Pressure equalizing ring; 302. Pressure equalizing cavity; 303. Porous ring; 304. Air inlet pipe; 501. Active coupling; 502. Active clamping block; 503. Driven clamping block; 504. Driven coupling; 505. Elastic plum blossom pad; 601. Follow-up rotating ring; 602. Locking pin; 603. Silicone ball; 604. Fixed ring; 605. Insertion hole. Detailed Description of the Invention

[0020] It is easy to understand that according to the technical solution of the present invention, without changing the essence of the present invention, those of ordinary skill in the art can propose various structural forms and implementation methods that can be mutually replaced. Therefore, the following detailed description and the accompanying drawings are only illustrative descriptions of the technical solution of the present invention, and should not be regarded as the whole of the present invention or as a limitation or restriction on the technical solution of the present invention.

[0021] Refer to Figures 1 to 9As shown in the figure, the present invention provides a technical solution: a super-precision full-hydrostatic double-head grinding machine includes: a grinding machine bed body 1, on the top of the grinding machine bed body 1, a driving horizontal shaft 2 and a driving vertical shaft 11 are installed. The driving horizontal shaft 2 and the driving vertical shaft 11 are vertically arranged. The driving horizontal shaft 2 is used to drive the air-floating support for horizontal movement, and the driving vertical shaft 11 is used to drive the end surface grinding mechanism 12 and the inner hole grinding mechanism 13 for vertical movement. The driving horizontal shaft 2 and the driving vertical shaft 11 interact to align the end surface grinding mechanism 12 and the inner hole grinding mechanism 13 with the bushing workpiece 10 for processing.

[0022] Traditional grinding machines are usually set as single-head. First, one end of the workpiece is processed. After the processing is completed, the workpiece is turned around to process the other end. The secondary clamping of the workpiece will increase a certain amount of labor cost. During the clamping process, due to reasons such as positioning errors or force deformation, the processing dimensions, precision, or surface quality of the two ends may be inconsistent, affecting the overall performance of the workpiece. To solve this problem, the present application improves the grinding machine as follows: On the top of the driving vertical shaft 11, an end surface grinding mechanism 12 is installed. There are two groups of the end surface grinding mechanisms 12 symmetrically arranged about the vertical central axis of the driving horizontal shaft 2. On the top of the driving vertical shaft 11, an inner hole grinding mechanism 13 is also installed. The inner hole grinding mechanism 13 is arranged on the side of the end surface grinding mechanism 12, and there are two groups of the inner hole grinding mechanisms 13 symmetrically arranged about the vertical central axis of the driving horizontal shaft 2. On the top of the driving horizontal shaft 2, a support housing 4 is installed. Inside the support housing 4, a mounting ring 9 is fixedly connected. Inside the mounting ring 9, a locking assembly 6 is coaxially arranged. The locking assembly 6 includes a fixed ring 604. At one end of the fixed ring 604, a first clamping assembly 7 is installed, and at the other end of the fixed ring 604, a second clamping assembly 8 is installed. The first clamping assembly 7 and the second clamping assembly 8 are coaxially arranged. The bushing workpiece 10 is inserted into the first clamping assembly 7, and the bushing workpiece 10 passes through the second clamping assembly 8. The first clamping assembly 7 and the second clamping assembly 8 in the air-floating support are used to clamp and fix the bushing workpiece 10, and both ends of the bushing workpiece 10 are exposed. Driven by the driving horizontal shaft 2, both ends of the bushing workpiece 10 can first be aligned with the inner hole grinding mechanism 13 to grind its inner hole, and then be aligned with the end surface grinding mechanism 12 to grind its end surface. There are two groups of the end surface grinding mechanisms 12 and the inner hole grinding mechanisms 13 symmetrically arranged at both ends of the bushing workpiece 10, which can grind both ends simultaneously. Through synchronous positioning and processing, it is ensured that both ends of the bushing workpiece 10 are processed under the same reference coordinate system, which is convenient for avoiding the positioning error introduced by secondary clamping, ensuring the consistency of the processing of the bushing workpiece 10, improving the quality of the bushing workpiece 10, and simultaneously processing both ends is convenient for reducing the clamping and processing time and improving the processing efficiency.

[0023] Existing grinding machine brackets usually use the same fixture or two rigidly connected fixtures to clamp and fix the workpiece. When one end of the workpiece experiences abnormal jitter due to insufficient lubrication or foreign object blockage during grinding, the vibration and impact force will be transmitted along the workpiece and the clamping mechanism to the other end, causing the other end to suddenly jitter as well. Moreover, it remains in close contact with the high-speed rotating grinding tool, which is extremely likely to cause damage to the other end of the workpiece and the breakdown of the tool in contact with it. To solve this problem, the present application has the following design: Two groups of follower rotating rings 601 are symmetrically arranged inside the fixing ring 604. A number of buffer blocks 15 and a number of elastic coupling components 5 are arranged between the two groups of follower rotating rings 601. The buffer blocks 15 and the elastic coupling components 5 are arranged at intervals. The elastic coupling component 5 includes a driving coupling 501. The end of the driving coupling 501 is fixedly connected with a driving clamping block 502. The side of the driving clamping block 502 is clamped and connected with a driven clamping block 503. And an elastic plum blossom pad 505 is arranged between the driving clamping block 502 and the driven clamping block 503. One side of the elastic plum blossom pad 505 is fixedly connected with the driving clamping block 502, and the other side of the elastic plum blossom pad 505 is fixedly connected with the driven clamping block 503. The side of the driven clamping block 503 away from the driving clamping block 502 is fixedly connected with a driven coupling 504.

[0024] The elastic coupling component 5 is used to transmit torque, so that the first clamping component 7 and the second clamping component 8 can rotate together. And the elastic plum blossom pad 505 arranged at the connection can absorb the vibration between the driving clamping block 502 and the driven clamping block 503, playing a buffering role. The buffer block 15 is made of a flexible material. The buffer block 15 and the elastic coupling component 5 are jointly arranged in the middle of the first clamping component 7 and the second clamping component 8 to form a buffer mechanism between the first clamping component 7 and the second clamping component 8. When an unexpected situation occurs at one end of the bushing workpiece 10 and it experiences unexpected jitter, the fixture clamped on its outer side will jitter together. However, under the action of the buffer mechanism across the two fixtures, the elastic material buffer block 15 and the elastic plum blossom pad 505 can produce a certain deformation and have a damping characteristic. The strain change lags behind the stress change. This lag will cause internal molecular friction and convert mechanical energy into heat energy and dissipate it, thereby consuming the vibration energy. The buffering effect of the buffer mechanism can weaken the influence on the other end fixture when one fixture is vibrated as much as possible. And because the first clamping component 7 and the second clamping component 8 are firmly clamped and fixed on the outside of the bushing workpiece 10, the fixture and the buffer mechanism between them form a whole with the bushing workpiece 10. When one end of the bushing workpiece 10 is vibrated, due to the stiffness difference between the buffer mechanism and the bushing workpiece 10 and the impedance mismatch of the vibration path, the vibration will preferentially choose the buffer mechanism with weaker stiffness for transmission and be consumed by its absorption and buffering effect, thereby reducing the influence on the other end of the bushing workpiece 10 when one end of the bushing workpiece 10 is vibrated.

[0025] Although the vibration transmission from one end to the other can be reduced by the buffer mechanism, if the other end is not firmly fixed, there will still be a certain resonance phenomenon. Moreover, when the bushing workpiece 10 rotates at a high speed, the damage caused by this vibration will be further enhanced. To solve this problem, the present application makes the following improvements: Vibration sensors are installed inside both the first clamping assembly 7 and the second clamping assembly 8. The vibration sensor inside the first clamping assembly 7 is used to transmit signals to the locking pin 602 inside the follower rotating ring 601 on the side close to the second clamping assembly 8, and the vibration sensor inside the second clamping assembly 8 is used to transmit signals to the locking pin 602 inside the follower rotating ring 601 on the side close to the first clamping assembly 7. Moreover, the vibration sensors inside the first clamping assembly 7 and the second clamping assembly 8 can both transmit signals to timely brake the synchronous pulley 14. A number of locking pins 602 are installed inside the follower rotating ring 601. A number of jacks 605 are formed on the inner wall of the fixed ring 604, and the jacks 605 correspond to the locking pins 602 one by one. The two follower rotating rings 601 are symmetrically arranged about the vertical central axis of the fixed ring 604. One of the follower rotating rings 601 is fixedly connected to the first clamping assembly 7, and the other follower rotating ring 601 is fixedly connected to the second clamping assembly 8. The locking pins 602 are arranged in an annular array on the outer wall of the follower rotating ring 601. The output end of the follower rotating ring 601 is embedded with a silica gel ball 603, and the silica gel ball 603 is rotatably connected to the locking pin 602. The jack 605 includes a guiding portion and a locking portion. The guiding portion is arranged in a horn shape that gradually contracts from the outside to the inside, and the connection between the guiding portion and the locking portion is rounded off.

[0026] When abnormal vibration occurs at one end of the bushing workpiece 10 close to the first clamping assembly 7, the vibration sensor inside the first clamping assembly 7 will detect the abnormal vibration and transmit signals to the driving motor of the synchronous pulley 14 to brake the synchronous pulley 14. However, the braking of the motor has a certain hysteresis, and the rotating synchronous pulley 14 has a certain inertia, so there may be a situation where the braking is not timely. Therefore, at the same time, the vibration sensor inside the first clamping assembly 7 also transmits signals to the locking pin 602 on the side close to the second clamping assembly 8, so that the output end of the locking pin 602 extends outwards. The silica gel ball 603 rolls along the guide of the jack 605 and finally inserts into its locking portion to complete the locking. The silica gel ball 603 is used to reduce the impact when it contacts the fixed ring 604 and can also reduce the friction when sliding along the jack 605. After the output end of the locking pin 602 inserts into the jack 605 to complete the locking, the follower rotating ring 601 can no longer rotate, and thus the second clamping assembly 8 fixedly connected to it can no longer rotate.

[0027] Under the action of the locking component 6, when one end of the bushing workpiece 10 experiences unexpected jitter, the clamping side at the other end can complete locking and fixation. Even if a certain amount of vibration is transmitted, under the action of the locking component 6, the fixture is fixedly connected to the bracket, enhancing its stability. Moreover, during the process where the output end of the locking pin 602 slides along the guiding portion of the jack 605 and inserts into its locking portion, a certain positioning and calibration function can be achieved. If the fixture is offset to a certain extent compared to the entire air-floating bracket, after the output end of the locking pin 602 inserts into the jack 605, fine adjustment of the fixture position can be realized, enabling it to return to the correct position.

[0028] An air-floating component 3 is sleeved outside the first clamping component 7, and the air-floating component 3 is used for air-floating support of the first clamping component 7; the air-floating component 3 includes a pressure equalizing ring 301, the pressure equalizing ring 301 is fixedly connected to the inside of the mounting ring 9, a pressure equalizing cavity 302 is formed inside the pressure equalizing ring 301, an air inlet pipe 304 is fixedly connected to the side of the pressure equalizing ring 301, and the air inlet pipe 304 is communicated with the pressure equalizing cavity 302. A porous ring 303 is coaxially arranged inside the pressure equalizing ring 301, and the porous ring 303 is fixedly connected to the pressure equalizing ring 301. A plurality of pores communicating with the pressure equalizing cavity 302 are evenly distributed inside the porous ring 303. The porous ring 303 is fixedly connected to the end of the fixed ring 604. A synchronous pulley 14 is sleeved outside the second clamping component 8, and the synchronous pulley 14 is fixedly connected to the second clamping component 8. The synchronous pulley 14 is fixedly connected to one end of the fixed ring 604 away from the porous ring 303.

[0029] The processed high-pressure gas is introduced into the inside of the pressure equalizing cavity 302 through the air inlet pipe 304, forming a high-pressure environment inside the pressure equalizing cavity 302 and flowing inward through a plurality of gaps inside the porous ring 303. A gas film is formed between the porous ring 303 and the outer wall of the first clamping component 7, and this high-pressure gas film is used to support and fix the first clamping component 7. Moreover, a non-contact support method is adopted. Compared with the existing ball bearing support or oil film support methods, the non-contact support method of air-floating can further reduce the friction force between the two, thereby reducing the wear and heat generated due to friction when the first clamping component 7 is rotating at high speed. The first clamping component 7 and the porous ring 303 adopt a non-contact method. When an abnormal situation occurs at one end of the bushing workpiece 10 close to the first clamping component 7, causing the first clamping component 7 to suddenly jitter frequently, this jitter will not be directly transmitted outward through the porous ring 303 to the entire air-floating bracket, and can well intercept the impact force caused by the sudden jitter at the end of the bushing workpiece 10 and the first clamping component 7, reducing its impact on the entire bracket and the fixture and workpiece end locked on the other end of the bracket.

[0030] The internal structures of the first clamping assembly 7 and the second clamping assembly 8 are the same, and each includes an external fixture ring. A circle of hydraulic push rods is equidistantly installed on the inner wall thereof. The output end of the hydraulic push rod is fixedly connected with a fixed clamping block. After inserting the bushing workpiece 10 between the first clamping assembly 7 and the second clamping assembly 8, start the hydraulic push rod, and its output end drives the fixed clamping block to move towards the middle, then the bushing workpiece 10 can be clamped and fixed.

[0031] The technical scope of the present invention is not limited to the content described above. Those skilled in the art can make various deformations and modifications to the above embodiments without departing from the technical idea of the present invention, and these deformations and modifications should all fall within the protection scope of the present invention.

Claims

1. A super-precision total static pressure double-headed grinding machine, characterized in that, It includes a grinding machine bed body (1), on the top of the grinding machine bed body (1), a driving horizontal shaft (2) and a driving vertical shaft (11) are installed. The driving horizontal shaft (2) and the driving vertical shaft (11) are vertically arranged. On the top of the driving vertical shaft (11), an end face grinding mechanism (12) is installed. There are two groups of the end face grinding mechanisms (12) symmetrically arranged with respect to the vertical central axis of the driving horizontal shaft (2). On the top of the driving vertical shaft (11), an inner hole grinding mechanism (13) is also installed. The inner hole grinding mechanism (13) is arranged on the side of the end face grinding mechanism (12), and there are two groups of the inner hole grinding mechanisms (13) symmetrically arranged with respect to the vertical central axis of the driving horizontal shaft (2). On the top of the driving horizontal shaft (2), a bracket housing (4) is installed. Inside the bracket housing (4), an installation ring (9) is fixedly connected. Inside the installation ring (9), a locking component (6) is coaxially arranged. The locking component (6) includes a fixed ring (604). At one end of the fixed ring (604), a first clamping component (7) is installed, and at the other end of the fixed ring (604), a second clamping component (8) is installed. An air floating component (3) is sleeved outside the first clamping component (7), and the air floating component (3) is used for air floating support of the first clamping component (7). Inside the fixed ring (604), two groups of follower rotating rings (601) are symmetrically arranged. Inside the follower rotating rings (601), a number of locking pins (602) are installed. On the inner wall of the fixed ring (604), a number of jacks (605) are opened, and the jacks (605) correspond to the locking pins (602) one by one. Between the two groups of follower rotating rings (601), a number of buffer blocks (15) and elastic coupling components (5) are arranged, and the buffer blocks (15) and the elastic coupling components (5) are arranged at intervals.

2. The ultra-precision total pressure double-headed grinding machine according to claim 1, characterized in that: The two groups of follower rotating rings (601) are symmetrically arranged with respect to the vertical central axis of the fixed ring (604). One group of follower rotating rings (601) is fixedly connected to the first clamping component (7), and the other group of follower rotating rings (601) is fixedly connected to the second clamping component (8).

3. The ultra-precision total pressure double-head grinding machine according to claim 1, characterized in that: Vibration sensors are installed inside both the first clamping component (7) and the second clamping component (8). The vibration sensor inside the first clamping component (7) is used to transmit signals to the locking pins (602) inside the follower rotating ring (601) on the side close to the second clamping component (8). The vibration sensor inside the second clamping component (8) is used to transmit signals to the locking pins (602) inside the follower rotating ring (601) on the side close to the first clamping component (7).

4. The ultra-precision total pressure and static pressure double-headed grinding machine according to claim 1, wherein: The locking pins (602) are arranged in an annular array with respect to the outer wall of the follower rotating ring (601). The output end of the follower rotating ring (601) is embedded with silica gel balls (603), and the silica gel balls (603) are rotatably connected to the locking pins (602).

5. The ultra-precision total pressure double-headed grinding machine according to claim 1, wherein: The socket (605) includes a guiding portion and a locking portion. The locking portion is arranged at the end of the guiding portion, and the locking portion communicates with the guiding portion. The guiding portion is arranged in a horn shape that gradually contracts from outside to inside, and the connection between the guiding portion and the locking portion is rounded.

6. The ultra-precision total pressure double-headed grinding machine according to claim 1, characterized in that: The elastic coupling assembly (5) includes a driving coupling (501). A driving clamping block (502) is fixedly connected to the end of the driving coupling (501). A driven clamping block (503) is clamped and connected to the side of the driving clamping block (502). An elastic plum blossom pad (505) is arranged between the driving clamping block (502) and the driven clamping block (503). One side of the elastic plum blossom pad (505) is fixedly connected to the driving clamping block (502), and the other side of the elastic plum blossom pad (505) is fixedly connected to the driven clamping block (503). A driven coupling (504) is fixedly connected to the side of the driven clamping block (503) away from the driving clamping block (502).

7. The ultra-precision total pressure and static pressure double-headed grinding machine according to claim 1, characterized in that: The air floating assembly (3) includes a pressure equalizing ring (301). The pressure equalizing ring (301) is fixedly connected inside the mounting ring (9). A pressure equalizing cavity (302) is formed inside the pressure equalizing ring (301). An air inlet pipe (304) is fixedly connected to the side of the pressure equalizing ring (301), and the air inlet pipe (304) communicates with the pressure equalizing cavity (302).

8. The ultra-precision total pressure and static pressure double-headed grinding machine according to claim 7, characterized in that: A porous ring (303) is coaxially arranged inside the pressure equalizing ring (301), and the porous ring (303) is fixedly connected to the pressure equalizing ring (301). A number of pores communicating with the pressure equalizing cavity (302) are evenly distributed inside the porous ring (303). The porous ring (303) is fixedly connected to the end of the fixed ring (604).

9. The ultra-precision total pressure and static pressure double-head grinding machine according to claim 1, characterized in that: A synchronous pulley (14) is sleeved outside the second clamping assembly (8), and the synchronous pulley (14) is fixedly connected to the second clamping assembly (8). The synchronous pulley (14) is fixedly connected to one end of the fixed ring (604) away from the porous ring (303).

10. The ultra-precision total pressure and static pressure double-headed grinding machine according to claim 1, characterized in that: The first clamping assembly (7) and the second clamping assembly (8) are coaxially arranged. A sleeve workpiece (10) is inserted inside the first clamping assembly (7), and the sleeve workpiece (10) penetrates through the second clamping assembly (8).

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