An ultra-precision total hydrostatic double-head grinding machine

Abstract

This invention relates to the field of grinding machine technology and discloses an ultra-precision hydrostatic double-head grinding machine, including a grinding machine bed, a transmission horizontal and vertical axis, a grinding mechanism, a support shell, and a locking assembly. The grinding machine has two sets of end-face and inner-hole grinding mechanisms symmetrically arranged on both sides of the air-bearing support, enabling simultaneous processing of both ends of the workpiece. This eliminates the need for turning and clamping, improving processing efficiency while avoiding secondary clamping errors, ensuring processing consistency and workpiece quality. The two sets of clamps respectively hold both ends of the workpiece, and the buffer mechanism between them consists of a buffer block and an elastic coupling assembly, effectively reducing the transmission of abnormal vibration from one end to the other. The locking structure on the side of the clamps can promptly fix the other end when vibration occurs, enhancing stability. Furthermore, the air-bearing assembly uses a non-contact support method to reduce high-speed rotational wear and block vibration transmission between the clamps and the support. Through structural innovation, this grinding machine achieves efficient and stable processing, significantly improving processing safety and reliability.

Description

Technical Field

[0001] This invention relates to the field of grinding technology, and in particular to an ultra-precision total hydrostatic double-head grinding machine. Background Technology

[0002] Most grinding machines use high-speed rotating grinding wheels for grinding. The grinding wheel is made of abrasive grains bonded together with a binder. The abrasive grains have different shapes and are irregularly distributed, with each grain acting as a cutting tooth. When the grinding wheel rotates at high speed, the abrasive grains exert cutting, squeezing, and rubbing polishing effects on the workpiece surface, thereby achieving grinding of the workpiece surface and improving the surface quality and dimensional accuracy of the workpiece.

[0003] In the invention patent with publication number CN119407552A, an ultra-precision double-head spindle with total hydrostatic pressure is disclosed, relating to the field of machine tool spindle technology. It includes a spindle, a bushing fixedly connected to the outer surface of the spindle, a spindle housing rotatably connected to the outer surface of the bushing, a synchronous pulley fixedly connected to one side of the bushing's outer surface, a transmission component connected to the synchronous pulley, a belt cover fitted over the synchronous pulley, and the belt cover fixedly connected to the spindle housing. The belt cover contains an early warning mechanism for abnormal transmission component loosening, which automatically triggers an alarm to alert personnel when the transmission component becomes loose. This not only reduces the likelihood of spindle failure due to sudden situations such as transmission component detachment or breakage, thus lowering spindle maintenance costs and extending spindle lifespan, but also prevents vibration and noise caused by abnormal transmission component operation, ensuring spindle stability during operation and improving the grinding precision and quality of the product.

[0004] To maintain consistency in the machining of both ends of a workpiece, existing technologies employ dual-head spindles in grinding machines to clamp and fix the workpiece. Typically, a single clamping mechanism is used to hold the workpiece. Even when two clamping mechanisms are used to hold both ends, they are usually rigidly connected. Regarding the above and existing related technologies, the inventors believe that the following defects often exist: the rigidly connected clamping mechanisms lack a buffer mechanism. When one end of the workpiece experiences abnormal vibration due to insufficient lubrication or foreign objects obstructing grinding, this vibration and impact force will be transmitted along the workpiece and clamping mechanism to the other end. At this time, the workpiece is still rotating at high speed, which can easily cause the grinding tool at the other end, which is in close contact with it, to be impacted and broken, posing a certain safety hazard and increasing maintenance costs. Summary of the Invention

[0005] The technical problem to be solved by the present invention is that when an abnormality occurs at one end of the workpiece, the impact will affect the other end, which can easily cause the tool to break. To address this, we propose an ultra-precision hydrostatic double-head grinding machine.

[0006] To achieve the above objectives, this application adopts the following technical solution: an ultra-precision hydrostatic double-head grinding machine, comprising: a grinding machine bed, a transmission horizontal axis and a transmission vertical axis mounted on the top of the grinding machine bed, the transmission horizontal axis and the transmission vertical axis being arranged perpendicularly, an end face grinding mechanism mounted on the top of the transmission vertical axis, two sets of the end face grinding mechanism being symmetrically arranged about the vertical central axis of the transmission horizontal axis, and an inner hole grinding mechanism also mounted on the top of the transmission vertical axis, the inner hole grinding mechanism being arranged on the side of the end face grinding mechanism, and two sets of the inner hole grinding mechanism being symmetrically arranged about the vertical central axis of the transmission horizontal axis;

[0007] A bracket housing is mounted on the top of the transmission horizontal shaft. An installation ring is fixedly connected inside the bracket housing. A locking component is coaxially arranged inside the installation ring. The locking component includes a fixing ring. A first clamping component is mounted on one end of the fixing ring, and a second clamping component is mounted on the other end of the fixing ring. An air-floating component is sleeved on the outside of the first clamping component. The air-floating component is used to provide air-floating support for the first clamping component.

[0008] The fixed ring has two sets of follower rotating rings symmetrically arranged inside. Each follower rotating ring has several locking pins installed inside. The inner wall of the fixed ring has several insertion holes, and each insertion hole corresponds to a locking pin. Several buffer blocks and elastic coupling assemblies are arranged between the two sets of follower rotating rings, and the buffer blocks and elastic coupling assemblies are spaced apart.

[0009] Preferably, the two sets of follower rings are symmetrically arranged about the vertical central axis of the fixed ring, one set of follower rings is fixedly connected to the first clamping assembly, and the other set of follower rings is fixedly connected to the second clamping assembly.

[0010] Preferably, both the first clamping assembly and the second clamping assembly are equipped with vibration sensors. The vibration sensor inside the first clamping assembly is used to transmit a signal to the locking pin inside the follower rotating ring near the second clamping assembly, and the vibration sensor inside the second clamping assembly is used to transmit a signal to the locking pin inside the follower rotating ring near the first clamping assembly.

[0011] Preferably, the locking pins are arranged in a ring array about the outer wall of the follower ring, and the output end of the follower ring is embedded with silicone balls, which are rotatably connected to the locking pins.

[0012] Preferably, the insertion hole includes a guide portion and a locking portion. The locking portion is disposed at the end of the guide portion and is connected to the guide portion. The guide portion is configured as a trumpet shape that gradually narrows from the outside to the inside, and the connection between the guide portion and the locking portion is rounded.

[0013] Preferably, the flexible coupling assembly includes an active coupling, an active locking block is fixedly connected to the end of the active coupling, a driven locking block is engaged with the side of the active locking block, and an elastic perforated pad is provided between the active locking block and the driven locking block. One side of the elastic perforated pad is fixedly connected to the active locking block, and the other side of the elastic perforated pad is fixedly connected to the driven locking block. The driven coupling is fixedly connected to the side of the driven locking block away from the active locking block.

[0014] Preferably, the air flotation assembly includes a pressure equalization ring, which is fixedly connected to the inside of the mounting ring. The pressure equalization ring has a pressure equalization cavity inside, and an air inlet pipe is fixedly connected to the side of the pressure equalization ring, and the air inlet pipe is connected to the pressure equalization cavity.

[0015] Preferably, the equalizing ring has a porous ring coaxially arranged inside, and the porous ring is fixedly connected to the equalizing ring. The porous ring has a plurality of pores that are uniformly distributed inside and communicate with the equalizing cavity. The ends of the porous ring are fixedly connected to the fixed ring.

[0016] Preferably, a synchronous wheel is sleeved on the outside of the second clamping assembly, and the synchronous wheel is fixedly connected to the second clamping assembly. The synchronous wheel is fixedly connected to the end of the fixing ring away from the porous ring.

[0017] Preferably, the first clamping component and the second clamping component are coaxially arranged, and a bushing workpiece is inserted inside the first clamping component, and the bushing workpiece passes through the second clamping component.

[0018] The technical effects and advantages of this invention are as follows:

[0019] 1. The present invention has two sets of end face grinding mechanisms and inner hole grinding mechanisms symmetrically arranged on both sides of the air flotation support, which can simultaneously process both ends of the workpiece, eliminating the need for re-clamping in the middle, thus improving processing efficiency. Simultaneous processing at both ends ensures consistency in processing, reduces inconsistencies caused by errors in secondary clamping, and thus improves the quality of the workpiece.

[0020] 2. In this invention, two sets of clamps are used to clamp both ends of the workpiece separately, and the two sets of clamps are connected by a buffer mechanism. Locking structures are provided on the sides of the clamps. When abnormal vibration occurs at one end of the workpiece, the other end can be locked and fixed in time. The buffer mechanism can reduce the transmission of vibration from one end to the other end, and the locking structure can enhance the stability of the other end. The two work together to minimize the adverse effects on the other end when the workpiece is processed simultaneously at both ends. This also improves safety performance. Furthermore, an air-floating component is provided. The air-floating support not only reduces wear during high-speed rotation, but also allows the first clamping component to be supported by the entire support in a non-contact manner, which can reduce the transmission of vibration between the clamp and the entire support. Attached Figure Description

[0021] The disclosure of this invention is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention. In the drawings, the same reference numerals are used to refer to the same parts:

[0022] Figure 1 This is a three-dimensional structural diagram of the entire invention;

[0023] Figure 2 This is a top view of the overall structure of the invention;

[0024] Figure 3 This is a three-dimensional structural diagram of the air-float support portion of the present invention;

[0025] Figure 4 This is a cross-sectional structural diagram of the air-float support portion of the present invention;

[0026] Figure 5 This is a three-dimensional structural diagram of the elastic coupling assembly and locking assembly of the present invention;

[0027] Figure 6 This is a three-dimensional structural diagram of the flexible coupling assembly of the present invention;

[0028] Figure 7 This is a cross-sectional structural diagram of the locking component of the present invention;

[0029] Figure 8 This is a cross-sectional structural diagram of the air flotation component of the present invention;

[0030] Figure 9 This is a cross-sectional structural diagram of the first clamping component of the present invention.

[0031] Legend: 1. Grinding machine bed; 2. Transmission horizontal shaft; 3. Air float assembly; 4. Support housing; 5. Flexible coupling assembly; 6. Locking assembly; 7. First clamping assembly; 8. Second clamping assembly; 9. Mounting ring; 10. Bushing workpiece; 11. Transmission longitudinal shaft; 12. End face grinding mechanism; 13. Internal hole grinding mechanism; 14. Synchronous pulley; 15. Buffer block; 301. Pressure equalizing ring; 302. Pressure equalizing chamber; 303. Perforated ring; 304. Air inlet pipe; 501. Active coupling; 502. Active locking block; 503. Driven locking block; 504. Driven coupling; 505. Flexible plum blossom pad; 601. Follower rotating ring; 602. Locking pin; 603. Silicone ball; 604. Fixing ring; 605. Insertion hole. Detailed Implementation

[0032] It is readily understood that, based on the technical solution of this invention, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of the invention. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative examples of the technical solution of this invention and should not be considered as the entirety of the invention or as limitations or restrictions on the technical solution of this invention.

[0033] Reference Figures 1 to 9 As shown, the present invention provides a technical solution: an ultra-precision hydrostatic double-head grinding machine includes: a grinding machine bed 1, a transmission horizontal shaft 2 and a transmission vertical shaft 11 are installed on the top of the grinding machine bed 1, the transmission horizontal shaft 2 and the transmission vertical shaft 11 are arranged vertically, the transmission horizontal shaft 2 is used to carry the air float support to move laterally, and the transmission vertical shaft 11 is used to carry the end face grinding mechanism 12 and the inner hole grinding mechanism 13 to move longitudinally, the transmission horizontal shaft 2 and the transmission vertical shaft 11 interact to make the end face grinding mechanism 12 and the inner hole grinding mechanism 13 align with the bushing workpiece 10 for processing.

[0034] Traditional grinding machines are typically single-headed, machining one end of the workpiece first, then turning the workpiece around to machine the other end, requiring a second clamping. This increases labor costs. Furthermore, during clamping, positioning errors or deformation due to stress can cause inconsistencies in the machined dimensions, accuracy, or surface quality at both ends, affecting the overall performance of the workpiece. To address this issue, this application proposes the following improvements to the grinding machine:

[0035] A face grinding mechanism 12 is mounted on the top of the transmission longitudinal shaft 11. Two sets of face grinding mechanisms 12 are symmetrically arranged about the vertical centerline of the transmission transverse shaft 2. An inner hole grinding mechanism 13 is also mounted on the top of the transmission longitudinal shaft 11. The inner hole grinding mechanism 13 is located on the side of the face grinding mechanism 12, and two sets of inner hole grinding mechanisms 13 are symmetrically arranged about the vertical centerline of the transmission transverse shaft 2. A bracket housing 4 is mounted on the top of the transmission transverse shaft 2. An installation ring 9 is fixedly connected inside the bracket housing 4. A locking assembly 6 is coaxially arranged inside the installation ring 9. The locking assembly 6 includes a fixing ring 604. A first clamping assembly 7 is mounted on one end of the fixing ring 604, and a second clamping assembly 8 is mounted on the other end of the fixing ring 604. The first clamping assembly 7 and the second clamping assembly 8 are coaxially arranged. A bushing workpiece 10 is inserted inside the first clamping assembly 7. The first clamping component 7 and the second clamping component 8 in the air-bearing bracket are used to clamp and fix the bushing workpiece 10, and expose both ends of the bushing workpiece 10. Under the driving action of the transmission horizontal shaft 2, the two ends of the bushing workpiece 10 can first be aligned with the inner hole grinding mechanism 13 to grind its inner hole, and then aligned with the end face grinding mechanism 12 to grind its end face. The end face grinding mechanism 12 and the inner hole grinding mechanism 13 are symmetrically arranged in two sets at both ends of the bushing workpiece 10, which can grind both ends at the same time. Through synchronous positioning and processing, it is ensured that both ends of the bushing workpiece 10 are processed in the same reference coordinate system, which helps to avoid the positioning error introduced by secondary clamping, ensures the consistency of the processing of the bushing workpiece 10, improves the quality of the bushing workpiece 10, and the simultaneous processing of both ends helps to reduce clamping and processing time and improve processing efficiency.

[0036] Existing grinding machine supports typically use the same fixture or two rigidly connected fixtures to hold and fix the workpiece. When one end of the workpiece experiences abnormal vibration due to insufficient lubrication or foreign objects obstructing grinding, this vibration and impact force will be transmitted along the workpiece and clamping mechanism to the other end, causing that end to also experience sudden vibration. Furthermore, it remains in close contact with the high-speed rotating grinding tool, which can easily lead to damage to the other end of the workpiece and breakage of the tool it is in contact with. To solve this problem, this application proposes the following design:

[0037] Two sets of follower rotating rings 601 are symmetrically arranged inside the fixed ring 604. Several buffer blocks 15 and several elastic coupling assemblies 5 are arranged between the two sets of follower rotating rings 601. The buffer blocks 15 and the elastic coupling assemblies 5 are spaced apart. The elastic coupling assembly 5 includes an active coupling 501. An active locking block 502 is fixedly connected to the end of the active coupling 501. A driven locking block 503 is engaged with the side of the active locking block 502. An elastic plum blossom pad 505 is arranged between the active locking block 502 and the driven locking block 503. One side of the elastic plum blossom pad 505 is fixedly connected to the active locking block 502, and the other side of the elastic plum blossom pad 505 is fixedly connected to the driven locking block 503. A driven coupling 504 is fixedly connected to the side of the driven locking block 503 away from the active locking block 502.

[0038] The flexible coupling assembly 5 is used to transmit torque, allowing the first clamping assembly 7 and the second clamping assembly 8 to rotate together. The flexible swivel pad 505 at the connection point can absorb the vibration between the active clamping block 502 and the driven clamping block 503, thus playing a buffering role. The buffer block 15 is made of flexible material. The buffer block 15 and the flexible coupling assembly 5 are arranged together between the first clamping assembly 7 and the second clamping assembly 8, forming a buffer mechanism between the first clamping assembly 7 and the second clamping assembly 8. When one end of the bushing workpiece 10 experiences an unexpected situation and shakes unexpectedly, the clamps clamped on its outer side shake together. However, under the action of the buffer mechanism between the two clamps, the elastic material buffer block 15 and the flexible swivel pad 505 can produce a certain deformation and have damping characteristics. The strain change lags behind the stress change. This lag will cause internal molecular friction, converting mechanical energy into heat energy and dissipating it, thereby consuming vibration energy. The buffering effect of the buffer mechanism can minimize the impact of vibration on the other clamp when one clamp is vibrating. Furthermore, since the first clamping assembly 7 and the second clamping assembly 8 are firmly clamped and fixed to the outside of the bushing workpiece 10, the clamp and the buffer mechanism therebetween form an integral whole with the bushing workpiece 10. When one end of the bushing workpiece 10 is subjected to vibration, due to the stiffness difference between the buffer mechanism and the bushing workpiece 10, as well as the impedance mismatch of the vibration path, the vibration will preferentially choose the weaker buffer mechanism for transmission and be consumed by its absorption and buffering effect, thereby reducing the impact of vibration on the other end of the bushing workpiece 10 when one end of the bushing workpiece 10 vibrates.

[0039] Although the transmission of vibration from one end to the other can be reduced by setting up a buffer mechanism, if the other end is not fixed stably, a certain degree of resonance will still exist. Furthermore, when the bushing workpiece 10 rotates at high speed, the destructiveness caused by this vibration will be further amplified. To solve this problem, this application makes the following improvements:

[0040] Both the first clamping assembly 7 and the second clamping assembly 8 are equipped with vibration sensors. The vibration sensor inside the first clamping assembly 7 transmits signals to the locking pin 602 inside the follower rotating ring 601 near the second clamping assembly 8. The vibration sensor inside the second clamping assembly 8 transmits signals to the locking pin 602 inside the follower rotating ring 601 near the first clamping assembly 7. Both vibration sensors can transmit signals to brake the synchronous pulley 14 in a timely manner. The follower rotating ring 601 has several locking pins 602 installed inside, and the inner wall of the fixed ring 604 has several insertion holes 605. Furthermore, the insertion holes 605 correspond one-to-one with the locking pins 602. Two sets of follower rings 601 are symmetrically arranged about the vertical central axis of the fixed ring 604. One set of follower rings 601 is fixedly connected to the first clamping component 7, and the other set of follower rings 601 is fixedly connected to the second clamping component 8. The locking pins 602 are arranged in a ring array about the outer wall of the follower rings 601. The output end of the follower rings 601 is embedded with silicone balls 603. The silicone balls 603 are rotatably connected to the locking pins 602. The insertion hole 605 includes a guide part and a locking part. The guide part is set as a trumpet shape that gradually narrows from the outside to the inside, and the connection between the guide part and the locking part is rounded.

[0041] When abnormal vibration occurs at the end of the workpiece 10 near the first clamping assembly 7, the vibration sensor inside the first clamping assembly 7 will detect the abnormal vibration and transmit a signal to the drive motor of the synchronous pulley 14 to brake the synchronous pulley 14. However, the braking of the motor has a certain lag, and the rotating synchronous pulley 14 has a certain inertia, which may result in a certain degree of untimely braking. Therefore, at the same time, the vibration sensor inside the first clamping assembly 7 also transmits a signal to the locking pin 602 near the second clamping assembly 8, causing the output end of the locking pin 602 to extend outward. The silicone ball 603 rolls along the guide of the insertion hole 605 and finally inserts into its locking part to complete the locking. The silicone ball 603 is used to reduce the impact when it contacts the fixing ring 604 and can reduce the friction when sliding along the insertion hole 605. After the output end of the locking pin 602 is inserted into the insertion hole 605 and the locking is completed, the follower rotating ring 601 can no longer rotate, and the second clamping assembly 8 fixed to it can no longer rotate.

[0042] Under the action of the locking component 6, when one end of the bushing workpiece 10 experiences unexpected vibration, the clamp side at the other end can lock and fix it. Even if some vibration is transmitted, the clamp and the bracket are connected and fixed together under the action of the locking component 6, which enhances its stability. In addition, when the output end of the locking pin 602 slides along the guide part of the insertion hole 605 and inserts into its locking part, a certain positioning and calibration function can be achieved. If the clamp is offset from the entire air-bearing bracket, the clamp position can be finely adjusted after the output end of the locking pin 602 is inserted into the insertion hole 605, so that it returns to the correct position.

[0043] An air flotation component 3 is sleeved on the outside of the first clamping component 7. The air flotation component 3 is used to provide air flotation support for the first clamping component 7. The air flotation component 3 includes a pressure equalizing ring 301, which is fixedly connected to the inside of the mounting ring 9. A pressure equalizing chamber 302 is opened 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 connected to the pressure equalizing chamber 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 number of holes connected to the pressure equalizing chamber 302 are evenly distributed inside the porous ring 303. The end of the porous ring 303 is fixedly connected to the end of the fixing ring 604. A synchronous wheel 14 is sleeved on the outside of the second clamping component 8, and the synchronous wheel 14 is fixedly connected to the second clamping component 8. The synchronous wheel 14 is fixedly connected to the end of the fixing ring 604 away from the porous ring 303.

[0044] After processing, the high-pressure gas is introduced into the pressure equalization chamber 302 through the air inlet pipe 304, creating a high-pressure environment inside the pressure equalization chamber 302. The gas then flows inward through multiple gaps inside the porous ring 303, forming an air film between the porous ring 303 and the outer wall of the first clamping assembly 7. This high-pressure air film is used to support and fix the first clamping assembly 7 in a non-contact support manner. Compared with existing ball bearing support or oil film support, the non-contact support method of air flotation can further reduce the friction between the two, thereby reducing the wear and heat generated by friction on the first clamping assembly 7 during high-speed operation. The first clamping component 7 and the porous ring 303 are in a non-contact manner. When the end of the bushing workpiece 10 near the first clamping component 7 experiences an abnormal situation, causing the first clamping component 7 to suddenly vibrate, this vibration will not be directly transmitted to the entire air-bearing bracket through the porous ring 303. This effectively traps the impact force caused by the sudden vibration at the end of the bushing workpiece 10 and the first clamping component 7, reducing its impact on the entire bracket and the clamp and workpiece end locked on the bracket at the other end.

[0045] The first clamping assembly 7 and the second clamping assembly 8 have the same internal structure. Both include an external clamping ring and a ring of hydraulic push rods installed at equal intervals on the inner wall. The output end of the hydraulic push rod is fixedly connected to a fixed clamping block. After inserting the bushing workpiece 10 between the first clamping assembly 7 and the second clamping assembly 8, the hydraulic push rod is activated. Its output end moves towards the center with the fixed clamping block, thus clamping and fixing the bushing workpiece 10.

[0046] The technical scope of this invention is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this invention, and all such modifications and variations should fall within the protection scope of this invention.

Claims

1. An ultra-precision total hydrostatic double-head grinding machine, characterized in that, The machine includes a grinding machine bed (1), on the top of which a transmission horizontal shaft (2) and a transmission vertical shaft (11) are installed. The transmission horizontal shaft (2) and the transmission vertical shaft (11) are arranged vertically. A face grinding mechanism (12) is installed on the top of the transmission vertical shaft (11). Two sets of the face grinding mechanism (12) are symmetrically arranged about the vertical centerline of the transmission horizontal shaft (2). An internal hole grinding mechanism (13) is also installed on the top of the transmission vertical shaft (11). The internal hole grinding mechanism (13) is located on the side of the face grinding mechanism (12), and two sets of the internal hole grinding mechanism (13) are symmetrically arranged about the vertical centerline of the transmission horizontal shaft (2). A bracket housing (4) is installed on the top of the transmission horizontal shaft (2). An installation ring (9) is fixedly connected inside the bracket housing (4). A locking component (6) is coaxially arranged inside the installation ring (9). The locking component (6) includes a fixing ring (604). A first clamping component (7) is installed at one end of the fixing ring (604), and a second clamping component (8) is installed at the other end of the fixing ring (604). An air-floating component (3) is sleeved on the outside of the first clamping component (7). The air-floating component (3) is used to provide air-floating support for the first clamping component (7). The fixed ring (604) has two sets of follower rotating rings (601) symmetrically arranged inside. The follower rotating ring (601) has several locking pins (602) installed inside. The inner wall of the fixed ring (604) has several insertion holes (605), and the insertion holes (605) correspond one-to-one with the locking pins (602). Several buffer blocks (15) and elastic coupling assembly (5) are arranged between the two sets of follower rotating rings (601). The buffer blocks (15) and elastic coupling assembly (5) are spaced apart.

2. The ultra-precision total hydrostatic double-head grinding machine according to claim 1, characterized in that: The two sets of follower rings (601) are symmetrically arranged about the vertical central axis of the fixed ring (604). One set of follower rings (601) is fixedly connected to the first clamping assembly (7), and the other set of follower rings (601) is fixedly connected to the second clamping assembly (8).

3. The ultra-precision total hydrostatic double-head grinding machine according to claim 1, characterized in that: Both the first clamping assembly (7) and the second clamping assembly (8) are equipped with vibration sensors. The vibration sensor inside the first clamping assembly (7) is used to transmit a signal to the locking pin (602) inside the follower rotating ring (601) near the second clamping assembly (8). The vibration sensor inside the second clamping assembly (8) is used to transmit a signal to the locking pin (602) inside the follower rotating ring (601) near the first clamping assembly (7).

4. The ultra-precision total hydrostatic double-head grinding machine according to claim 1, characterized in that: The locking pin (602) is arranged in a ring array about the outer wall of the follower ring (601). The output end of the follower ring (601) is embedded with a silicone ball (603), and the silicone ball (603) is rotatably connected to the locking pin (602).

5. The ultra-precision total hydrostatic double-head grinding machine according to claim 1, characterized in that: The socket (605) includes a guide portion and a locking portion. The locking portion is disposed at the end of the guide portion and is connected to the guide portion. The guide portion is configured as a trumpet shape that gradually narrows from the outside to the inside, and the connection between the guide portion and the locking portion is rounded.

6. The ultra-precision total hydrostatic double-head grinding machine according to claim 1, characterized in that: The flexible coupling assembly (5) includes an active coupling (501), an active locking block (502) is fixedly connected to the end of the active coupling (501), a driven locking block (503) is engaged with the side of the active locking block (502), and an elastic perforated pad (505) is provided between the active locking block (502) and the driven locking block (503). One side of the elastic perforated pad (505) is fixedly connected to the active locking block (502), and the other side of the elastic perforated pad (505) is fixedly connected to the driven locking block (503). A driven coupling (504) is fixedly connected to the side of the driven locking block (503) away from the active locking block (502).

7. The ultra-precision total hydrostatic double-head grinding machine according to claim 1, characterized in that: The air flotation assembly (3) includes a pressure equalization ring (301), which is fixedly connected to the inside of the mounting ring (9). The pressure equalization ring (301) has a pressure equalization chamber (302) inside. An air inlet pipe (304) is fixedly connected to the side of the pressure equalization ring (301), and the air inlet pipe (304) is connected to the pressure equalization chamber (302).

8. The ultra-precision total hydrostatic double-head grinding machine according to claim 7, characterized in that: The equalizing ring (301) has a perforated ring (303) coaxially arranged inside, and the perforated ring (303) is fixedly connected to the equalizing ring (301). The perforated ring (303) has a number of pores that are connected to the equalizing cavity (302) evenly distributed inside. The perforated ring (303) is fixedly connected to the end of the fixed ring (604).

9. The ultra-precision total hydrostatic double-head grinding machine according to claim 1, characterized in that: The second clamping assembly (8) is fitted with a synchronous wheel (14), and the synchronous wheel (14) is fixedly connected to the second clamping assembly (8). The synchronous wheel (14) is fixedly connected to the end of the fixing ring (604) away from the porous ring (303).

10. The ultra-precision total hydrostatic double-head grinding machine according to claim 1, characterized in that: The first clamping component (7) and the second clamping component (8) are coaxially arranged. The first clamping component (7) has a bushing workpiece (10) inserted inside, and the bushing workpiece (10) passes through the second clamping component (8).

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