Holding mechanism for static pressure rotary table and control method of holding mechanism

Abstract

The invention discloses an enclasping mechanism for a static pressure rotary table and a control method of the enclasping mechanism. The holding mechanism comprises a hydraulic assembly and a friction assembly. The hydraulic assembly comprises a hydraulic cylinder body and a hydraulic rod, the hydraulic cylinder body is provided with a containing cavity, an elastic piece is arranged at the bottom of the containing cavity, and the hydraulic rod is arranged in the containing cavity in a sliding mode and abuts against the elastic piece; the friction assembly comprises a first friction plate, a second friction plate and a main friction plate, the first friction plate is fixedly arranged on the base, the second friction plate is connected to the hydraulic rod, and the main friction plate is arranged on the workbench and located between the first friction plate and the second friction plate; the second friction plate is provided with a first position which is in contact with the main friction plate to lock the main friction plate on the first friction plate so as to lock the workbench, and the elastic piece is configured to be pre-pressed when the static pressure rotary table is in an initial state so as to enable the second friction plate to be in the first position. The problem that in the prior art, when an enclasping structure loses power, it is difficult to achieve the safety protection effect on the rotating table can be solved.

Description

Technical Field

[0001] The present application relates to the technical field of machining machine tools, and in particular to a clamping mechanism for a hydrostatic turntable and a control method thereof. Background Art

[0002] As a key functional component of ultra-precision machining machine tools, the rotary table is responsible for providing precise rotational motion for the machine tools. When performing angle indexing tasks, the table can drive the workpiece to achieve precise rotational positioning on a circular path according to the preset indexing angle; when performing linked processing, it feeds in the circumferential direction and works in coordination with other linear feed axes and rotary feed axes to complete high-precision processing of complex surfaces. In the linked processing mode, since the processing load is relatively small, the load generated during the cutting process is mainly overcome by the motor. However, when performing heavy cutting operations, the rotary table must be firmly locked with the help of a clamping structure to ensure that the processing accuracy can be maintained under heavy load conditions.

[0003] Existing clamping structures include hickey disc clamping structures, radial encircling clamping devices, and axial friction plate clamping structures. Among them, the axial friction plate clamping structure has the advantages of simple structure, large clamping torque, and can be applied to rotary tables with any angle indexing, and is widely used. However, the axial friction plate clamping structure is driven by a hydraulic or pneumatic system to press or loosen the friction plates against each other, and cannot provide safety protection for the rotary table when power is lost. Summary of the invention

[0004] The main purpose of the present application is to provide a clamping mechanism for a hydrostatic turntable and a control method thereof, so as to solve the problem that the clamping structure in the prior art is difficult to provide safety protection for the turntable when power is lost.

[0005] According to one aspect of the present application, a clamping mechanism for a hydrostatic turntable is provided, wherein the hydrostatic turntable comprises a worktable and a base, wherein the worktable is rotatably disposed on the base, and the clamping mechanism comprises:

[0006] A hydraulic assembly, the hydraulic assembly is arranged on the base, the hydraulic assembly comprises a hydraulic cylinder body and a hydraulic rod, the hydraulic cylinder body has a receiving cavity, an elastic member is arranged at the bottom of the receiving cavity, and the hydraulic rod is slidably arranged in the receiving cavity and abuts against the elastic member;

[0007] A friction assembly, the friction assembly is arranged between the workbench and the base, the friction assembly comprises a first friction plate, a second friction plate and a main friction plate, the first friction plate is fixedly arranged on the base, the second friction plate is connected to an end of the hydraulic rod away from the elastic member, and the main friction plate is arranged on the workbench and located between the first friction plate and the second friction plate;

[0008] Wherein, the second friction plate has a first position in which it contacts the main friction plate to lock the main friction plate onto the first friction plate to lock the workbench, and the elastic member is configured to be pre-tightened when the hydrostatic turntable is in an initial state to make the second friction plate in the first position.

[0009] Furthermore, the clamping mechanism also includes a pre-compression member, which is movably arranged between the second friction plate and the hydraulic rod. The hydraulic rod has a first state in which it moves toward the elastic member under the compression action of the pre-compression member to pre-compress the elastic member so that the second friction plate is in the first position.

[0010] Furthermore, a threaded hole is provided at one end of the hydraulic rod close to the second friction plate;

[0011] A connecting rod is provided on one side of the second friction plate close to the hydraulic assembly, the connecting rod extends in a direction away from the second friction plate, and a threaded section matching the threaded hole is provided on the outer surface of the connecting rod, at least a part of the connecting rod is connected to the threaded hole through the threaded section so that the second friction plate is connected to the hydraulic rod;

[0012] The pre-tightening member includes an adjusting nut, which is rotatably mounted on the connecting rod and can reciprocate along the length direction of the connecting rod, wherein when the adjusting nut moves along the length direction of the connecting rod toward the direction of the hydraulic rod, the hydraulic rod can be placed in the first state.

[0013] Furthermore, the connecting rod has an external section extending from the threaded hole, and the adjusting nut is located on the external section and has an adjusting gap with the second friction plate;

[0014] The width of the adjustment gap is smaller than the length of the external section, and the minimum value A of the width of the adjustment gap satisfies the relationship: 5mm≤A≤10mm.

[0015] Further, the second friction plate also has a second position separated from the main friction plate to allow the worktable to rotate;

[0016] The hydraulic rod has a second state in which the hydraulic rod moves toward the elastic member to continuously compress the elastic member so that the second friction plate is in the second position.

[0017] Further, the hydraulic rod is provided with an outer flange, the outer flange is arranged around the outer surface of the hydraulic rod along the circumference of the hydraulic rod, and the outer flange is located in the accommodating cavity, and a pre-compression space is provided between a side of the outer flange close to the second friction plate and the hydraulic cylinder body;

[0018] The hydraulic assembly also includes a fixed seat, which is arranged on the base, and the hydraulic cylinder body is connected to the fixed seat. An oil inlet channel is arranged on the fixed seat, and the oil inlet channel is connected between the accommodating chamber and the hydraulic station. The hydraulic oil of the hydraulic station enters the accommodating chamber through the oil inlet channel and flows to the pre-compression space. The hydraulic oil in the pre-compression space applies a predetermined pressure to the hydraulic rod to put the hydraulic rod in the second state.

[0019] Furthermore, the oil inlet channel is connected to the hydraulic station via an oil supply channel, and a pressure regulating valve is provided on the oil supply channel. The pressure regulating valve is at least used to regulate the pressure of the hydraulic oil entering the oil inlet channel.

[0020] Furthermore, the hydraulic assembly includes a plurality of hydraulic assemblies, and the plurality of hydraulic assemblies are arranged on the base at intervals along the circumference of the workbench;

[0021] The first friction plate and the second friction plate each include a plurality of first friction plates, the plurality of first friction plates are arranged on the base at intervals along the circumferential direction of the workbench and are arranged one-to-one with the plurality of hydraulic components, the plurality of second friction plates are connected to the plurality of hydraulic components one-to-one with each other, and the main friction plate is located between the first friction plate and the second friction plate which are arranged opposite to each other;

[0022] Wherein, the plurality of hydraulic components are connected through the same oil flow channel, and one of the plurality of hydraulic components is connected to the hydraulic station through an oil supply channel.

[0023] Furthermore, the hydraulic cylinder body includes a main body and a bottom shell, the bottom shell is detachably connected to the main body and is arranged together with the main body to form the accommodating cavity, the bottom shell has a mounting column, the elastic member is sleeved on the mounting column, the hydraulic rod has a through hole at one end close to the bottom shell, the mounting column is passed through the through hole to enable the hydraulic rod to abut against the elastic member.

[0024] Furthermore, the elastic member includes a disc spring, and the disc spring is arranged at the bottom of the accommodating cavity in an overlapping, matched or composite superimposed manner.

[0025] On the other hand, the present application further provides a control method for a clamping mechanism for a hydrostatic turntable, the control method for a clamping mechanism for a hydrostatic turntable includes the above-mentioned clamping mechanism for a hydrostatic turntable, and the control method for a clamping mechanism for a hydrostatic turntable includes:

[0026] Step S1: controlling the hydraulic rod to be in a first state by adjusting the nut to pre-tighten the elastic member so that the second friction plate is in the first position;

[0027] Step S2: controlling the hydraulic rod to be in a second state through hydraulic oil to continuously compress the elastic member so that the second friction plate is in a second position.

[0028] Furthermore, before executing step S1, a stacking method of the elastic members is selected, and the step of selecting the stacking method of the elastic members includes:

[0029] Calculate the maximum load force P of the elastic member C The preload pressure P1 of the elastic member is set according to P1 and P C The ratio of determines the number of the elastic members, and determines the superposition mode of the elastic members, wherein P C =(4*E*t 2 *h0*K4 2 ) / [(1-μ 2 )*K1*D 2 ], where E is the elastic modulus, t is the thickness of the elastic member, h0 is the calculated value of the deformation of the elastic member without a supporting surface when flattened, K4 is the calculation coefficient, μ is the Poisson's ratio, K1 is the calculation coefficient, and D is the outer diameter of the elastic member; and / or,

[0030] In step S2, when the hydraulic oil controls the hydraulic rod to be in the second state, the predetermined pressure F applied by the hydraulic oil to the hydraulic rod in the pre-compression space satisfies the relationship: F=Ae*B-P1, wherein Ae is the area of ​​the hydraulic oil acting on the outer flange, B is the working pressure of the hydraulic cylinder body, and P1 is the pre-compression force of the elastic member.

[0031] The present application sets an elastic member in the hydraulic cylinder body and puts the elastic member in a pre-compression state, so that the elastic member can provide the hydraulic rod with power to approach the main friction plate, thereby locking the main friction plate on the first friction plate to clamp the workbench. The entire clamping process does not require the participation of the power system or the hydraulic system. Even in the event of power outage or hydraulic system failure, the clamping mechanism in the present application can still ensure that the workbench is in a clamped state under the reaction force of the elastic member, effectively preventing the workbench from accidentally moving or rotating, and improving the safety and reliability of the hydrostatic turntable. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0033] Figure 1 A cross-sectional view of the clamping mechanism disclosed in the embodiment of the present application;

[0034] Figure 2 This is a structural schematic diagram of a clamping mechanism disclosed in an embodiment of the present application being arranged on a base;

[0035] Figure 3 It is a schematic diagram of the structure of the static pressure turntable disclosed in the embodiment of the present application;

[0036] Figure 4 It is a schematic diagram of the partial structure of the static pressure turntable disclosed in the embodiment of the present application;

[0037] Figure 5 A flow chart of the control method disclosed in the embodiment of the present application;

[0038] Figure 6 Different F / P disclosed in the embodiments of this application C The relationship diagram of the elastic deformation under the conditions of .

[0039] The above drawings include the following reference numerals:

[0040] 10. Hydraulic assembly; 101. Accommodating chamber; 102. Pre-compression space; 11. Hydraulic cylinder; 111. Main body; 112. Bottom shell; 113. Mounting column; 12. Hydraulic rod; 121. Threaded hole; 122. External flange; 123. Through hole; 13. Fixed seat; 131. Oil inlet channel; 20. Elastic member; 30. Friction assembly; 31. First friction plate; 32. Second friction plate; 33. Main friction plate; 34. Connecting rod; 341. Threaded section; 342. External section; 40. Pre-compression member; 401. Adjustment gap; 41. Adjustment nut; 50. Workbench; 60. Base; 70. Oil flow channel; A. Minimum value of the width of the adjustment gap. DETAILED DESCRIPTION

[0041] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0042] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0043] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0044] As mentioned in the background technology, the existing clamping structures include a rat-tooth disc clamping structure, a radial embracing clamping device, and an axial friction plate clamping structure. Among them, the axial friction plate clamping structure has the advantages of simple structure, large clamping torque, and can be applied to rotary tables with any angle indexing, and is widely used. However, the axial friction plate clamping structure is driven by a hydraulic or pneumatic system to press or loosen the friction plates against each other, and cannot provide safety protection for the rotary table when the power is lost. To this end, the inventor of the present application has designed a new clamping mechanism, which can solve the problem that the clamping structure in the prior art is difficult to provide safety protection for the rotary table when the power is lost. The clamping mechanism of the present application will be described in detail below with reference to the accompanying drawings.

[0045] See also Figures 1 to 4 As shown, according to an embodiment of the present application, a clamping mechanism for a hydrostatic turntable is provided. The hydrostatic turntable includes a worktable 50 and a base 60 . The worktable 50 is rotatably disposed on the base 60 . The clamping mechanism includes a hydraulic assembly 10 and a friction assembly 30 .

[0046] Specifically, the hydraulic assembly 10 is arranged on the base 60, and the hydraulic assembly 10 includes a hydraulic cylinder body 11 and a hydraulic rod 12. The hydraulic cylinder body 11 has a receiving chamber 101, and an elastic member 20 is arranged at the bottom of the receiving chamber 101. The hydraulic rod 12 is slidably arranged in the receiving chamber 101 and abuts against the elastic member 20; the friction assembly 30 is arranged between the workbench 50 and the base 60, and the friction assembly 30 includes a first friction plate 31, a second friction plate 32 and a main friction plate 33. The first friction plate 31 is fixed The second friction plate 32 is arranged on the base 60, connected to the end of the hydraulic rod 12 away from the elastic member 20, and the main friction plate 33 is arranged on the workbench 50 and located between the first friction plate 31 and the second friction plate 32; wherein the second friction plate 32 has a first position in which the main friction plate 33 is in contact with the main friction plate 33 to lock the main friction plate 33 on the first friction plate 31 and lock the workbench 50, and the elastic member 20 is configured to be pre-pressed when the static pressure turntable is in the initial state so that the second friction plate 32 is in the first position. It should be noted that the "initial state" in this embodiment means that the workbench 50 needs to be in a stationary state.

[0047] In this embodiment, since the main friction plate 33 is disposed on the workbench 50, the main friction plate 33 can be driven to rotate synchronously when the workbench 50 rotates. However, it is difficult to perform heavy cutting and other operations during the rotation of the workbench 50. The workbench 50 must be firmly locked first to ensure that the workbench 50 can still maintain processing accuracy under heavy load conditions. To this end, in this embodiment, an elastic member 20 is provided at the bottom of the accommodating chamber 101 of the hydraulic cylinder body 11, and the hydraulic rod 12 is abutted against the elastic member 20, and the elastic member 20 is in a pre-tightened state. In this way, the elastic member 20 will apply a reaction force to the hydraulic rod 12, so that the hydraulic rod 12 moves in a direction away from the elastic member 20. In this process, since the second friction plate 32 is connected to the end of the hydraulic rod 12 away from the elastic member 20, and the main friction plate 33 is located between the first friction plate 31 and the second friction plate 32, the hydraulic rod 12 will drive the second friction plate 32 to move in a direction close to the main friction plate 33, and the second friction plate 32 will contact the main friction plate 33 and abut the main friction plate 33 on the first friction plate 31, so that the first friction plate 31 and the second friction plate 32 clamp the main friction plate 33, thereby generating a friction force to stop the main friction plate 33 from rotating, and then the workbench 50 can be stopped from rotating, so as to achieve the purpose of holding the workbench 50 tightly.

[0048] That is to say, in this embodiment, an elastic member 20 is provided in the hydraulic cylinder body 11, and the elastic member 20 is in a pre-compression state, so that the elastic member 20 can provide the hydraulic rod 12 with power to approach the main friction plate 33, thereby locking the main friction plate 33 on the first friction plate 31, so as to clamp the workbench 50. The entire clamping process does not require the participation of the power system or the hydraulic system. Even in the case of power outage or hydraulic system failure, the clamping mechanism in this embodiment can still ensure that the workbench 50 is in a clamped state under the reaction force of the elastic member 20, effectively preventing the workbench 50 from accidentally moving or rotating, and improving the safety and reliability of the hydrostatic turntable.

[0049] For example, in this embodiment, the main friction plate 33 and the workbench 50 , and the first friction plate 31 and the base 60 can be connected together by using locking members such as screws and bolts.

[0050] Further, see Figure 1 to Figure 2 As shown, the clamping mechanism in this embodiment further includes a pre-compression member 40, which is movably disposed between the second friction plate 32 and the hydraulic rod 12. The hydraulic rod 12 has a first state in which the hydraulic rod 12 moves toward the elastic member 20 under the compression of the pre-compression member 40 to pre-compress the elastic member 20 and put the second friction plate 32 in the first position. In other words, when the elastic member 20 needs to be in the pre-compression state, it is only necessary to control the pre-compression member 40 to move toward the direction close to the hydraulic rod 12, so as to drive the hydraulic rod 12 to move toward the direction of the elastic member 20. In this process, since the hydraulic rod 12 abuts against the elastic member 20, the movement of the hydraulic rod 12 will compress the elastic member 20, thereby pre-compressing the elastic member 20.

[0051] Specifically, the pre-compression member 40 is movably disposed between the second friction plate 32 and the hydraulic rod 12. By adjusting the position of the pre-compression member 40, the pre-compression degree of the hydraulic rod 12 on the elastic member 20 can be accurately controlled, thereby adjusting the deformation of the elastic member 20, and then the reaction force of the elastic member 20 can be controlled to achieve accurate locking of the workbench 50, to a certain extent avoiding the problems of the friction plate being worn due to excessive pre-compression force, thereby shortening the service life of the friction plate, or the inability to effectively lock the workbench 50 due to too small pre-compression force, thereby affecting the processing accuracy. At the same time, the pre-compression member 40 can enable the clamping mechanism to adapt to a variety of different working conditions, effectively improving the flexibility of the clamping mechanism.

[0052] Further, see Figure 1As shown, in this embodiment, the hydraulic rod 12 is provided with a threaded hole 121 at one end close to the second friction plate 32; a connecting rod 34 is provided on one side of the second friction plate 32 close to the hydraulic assembly 10, the connecting rod 34 extends in a direction away from the second friction plate 32, and a threaded section 341 adapted to the threaded hole 121 is provided on the outer surface of the connecting rod 34, at least part of the connecting rod 34 is connected to the threaded hole 121 through the threaded section 341 so that the second friction plate 32 is connected to the hydraulic rod 12; the pre-tightening member 40 includes an adjusting nut 41, which is rotatably sleeved on the connecting rod 34 and can reciprocate along the length direction of the connecting rod 34, wherein when the adjusting nut 41 moves along the length direction of the connecting rod 34 toward the direction of the hydraulic rod 12, the hydraulic rod 12 can be placed in the first state. It can be understood that in this embodiment, "at least part of the connecting rod 34 is connected to the threaded hole 121 through the threaded section 341" means that a part of the connecting rod 34 is located in the threaded hole 121, and the other part is located outside the threaded hole 121.

[0053] Specifically, the connecting rod 34 in this embodiment is connected to the hydraulic rod 12 by a thread, and the connecting rod 34 is arranged on the second friction plate 32. When the second friction plate 32 needs to be removed from the hydraulic rod 12, the second friction plate 32 can be separated from the hydraulic rod 12 by simply rotating the connecting rod 34. The structure is simple, and the operation is convenient and fast. At the same time, since the threaded connection is adjustable, the position of the second friction plate 32 relative to the hydraulic rod 12 can be accurately adjusted by rotating the connecting rod 34, so that the distance between the second friction plate 32 and the main friction plate 33 can be controlled to ensure that the second friction plate 32 can contact the main friction plate 33 under the reaction force of the elastic member 20. In addition, when the adjusting nut 41 moves along the length direction of the connecting rod 34 toward the direction of the hydraulic rod 12, it will push the hydraulic rod 12 to squeeze the elastic member 20, so that the elastic member 20 is subjected to a certain pre-tightening force, and then a reaction force can be applied to the hydraulic rod 12 so that the hydraulic rod 12 drives the second friction plate 32 to move toward the direction close to the main friction plate 33, and finally locks the main friction plate 33 between the first friction plate 31 and the second friction plate 32, so as to achieve the purpose of clamping the workbench 50.

[0054] Further, see Figure 1 As shown, the connecting rod 34 in this embodiment has an external section 342 extending from the threaded hole 121, and the adjusting nut 41 is located on the external section 342 and has an adjustment gap 401 with the second friction plate 32; wherein, the width of the adjustment gap 401 is less than the length of the external section 342, and the minimum value A of the width of the adjustment gap 401 satisfies the relationship: 5mm≤A≤10mm, for example, A can be set to 5mm, 5.5mm, 6mm, 6.5mm, 7mm, 7.5mm, 8mm, 8.5mm, 9mm, 9.5mm, 10mm, etc.

[0055] Specifically, when A is less than 5 mm, the effective adjustment stroke left for the adjustment nut 41 is short. When the pre-tightening degree of the elastic member 20 needs to be adjusted, the adjustment space of the adjustment nut 41 is limited, and it is difficult to achieve precise adjustment. When A is greater than 10 mm, the adjustment stroke of the adjustment nut 41 is long. When the pre-tightening force of the hydraulic rod 12 on the elastic member 20 needs to be adjusted by the adjustment nut 41, due to the large adjustment gap 401, the adjustment nut 41 needs to move a large distance to affect the hydraulic rod 12, thereby changing the pre-tightening state of the hydraulic rod 12 on the elastic member 20, which will cause the adjustment response time to be longer. That is to say, in this embodiment, by making the minimum value A of the width of the adjustment gap 401 satisfy the relationship: 5mm≤A≤10mm, it can be ensured that each circle of thread rotation can correspond to a relatively small and controllable displacement change, thereby achieving precise control of the pre-tightening force.

[0056] Further, see Figure 1 to Figure 2 As shown, the second friction plate 32 in this embodiment also has a second position separated from the main friction plate 33 to allow the workbench 50 to rotate; the hydraulic rod 12 has a second state of moving toward the elastic member 20 to continuously compress the elastic member 20 so that the second friction plate 32 is in the second position.

[0057] Specifically, when it is necessary to loosen the workbench 50 so that the workbench 50 continues to rotate, it is only necessary to move the hydraulic rod 12 toward the direction of the elastic member 20 to continuously compress the elastic member 20, thereby driving the second friction plate 32 to separate from the main friction plate 33, and effectively eliminating the friction between the second friction plate 32 and the main friction plate 33. The hindering effect of the friction force on the rotation of the workbench 50 is effectively eliminated, so that the workbench 50 can rotate smoothly under the drive of a motor or other power device, thereby realizing processing of different angles of the workpiece.

[0058] Further, see Figure 1As shown, the hydraulic rod 12 in this embodiment is provided with an outer flange 122, which is arranged around the outer surface of the hydraulic rod 12 along the circumference of the hydraulic rod 12, and the outer flange 122 is located in the accommodating chamber 101, and a pre-compression space 102 is provided between the side of the outer flange 122 close to the second friction plate 32 and the hydraulic cylinder body 11; the hydraulic assembly 10 also includes a fixed seat 13, the fixed seat 13 is arranged on the base 60, the hydraulic cylinder body 11 is connected to the fixed seat 13, and an oil inlet channel 131 is provided on the fixed seat 13, and the oil inlet channel 131 is connected between the accommodating chamber 101 and the hydraulic station, and the hydraulic oil of the hydraulic station enters the accommodating chamber 101 through the oil inlet channel 131 and flows to the pre-compression space 102, and the hydraulic oil in the pre-compression space 102 applies a predetermined pressure to the hydraulic rod 12, so that the hydraulic rod 12 is in the second state. For example, the hydraulic cylinder body 11 and the fixing seat 13 in this embodiment can be connected by threaded connection, screw connection or clamping, and other deformation methods as long as they are based on the concept of this application are within the protection scope of this application.

[0059] Specifically, in this embodiment, the hydraulic station supplies oil to the oil inlet channel 131, so that the hydraulic oil enters the accommodating chamber 101 and flows to the pre-compression space 102, and the hydraulic oil is used to apply a predetermined pressure to the hydraulic rod 12, so that the hydraulic rod 12 is accurately placed in the second state, and the second friction plate 32 can be separated from the main friction plate 33, effectively improving the reliability and stability of the operation of the clamping mechanism. Among them, the predetermined pressure applied by the hydraulic oil in the pre-compression space 102 to the hydraulic rod 12 is stable and adjustable; the design of the outer flange 122 enables the hydraulic oil to form a relatively closed pre-compression space 102 between it and the hydraulic cylinder body 11, ensuring the effective transmission of pressure. That is to say, in this embodiment, the second friction plate 32 and the main friction plate 33 are separated by hydraulic drive. When the hydraulic oil enters the pre-compression space 102 and applies pressure to the hydraulic rod 12, the outer flange 122 on the hydraulic rod 12 acts as a buffer. The pressure of the hydraulic oil first acts on the outer flange 122, and the outer flange 122 transmits the force to the hydraulic rod 12 evenly, so that the force distribution on the hydraulic rod 12 is more even, which helps to avoid damage to the hydraulic rod 12 due to excessive local force, and can also better transmit the force to the elastic member 20, so as to achieve stable control of the position of the second friction plate 32.

[0060] Furthermore, the oil inlet channel 131 in this embodiment is connected to the hydraulic station through an oil supply channel (not shown in the drawings), and a pressure regulating valve (not shown in the drawings) is provided on the oil supply channel. The pressure regulating valve is at least used to adjust the pressure of the hydraulic oil entering the oil inlet channel 131.

[0061] Specifically, in this embodiment, the pressure regulating valve can accurately adjust the pressure of the hydraulic oil entering the oil inlet pipeline, and the flow and pressure of the hydraulic oil can be controlled by changing the opening of the valve. During the operation of the hydrostatic turntable, different working stages or different working conditions may require different forces of the hydraulic rod 12. For example, in the working stage, a higher pressure may be required to ensure that the hydraulic rod 12 is stably in the second state, so that the second friction plate 32 is reliably separated from the main friction plate 33, and the workbench 50 rotates normally. At the same time, in the hydraulic system, pressure fluctuations may occur. For example, when the pump of the hydraulic station is suddenly started or stopped, or when other components in the system have a short-term failure, the pressure of the hydraulic oil may increase or decrease instantly. The setting of the pressure regulating valve can play a buffering role to prevent excessive pressure from impacting the hydraulic rod 12 and other hydraulic components 10, thereby avoiding damage to the equipment. At the same time, it can also prevent the hydraulic rod 12 from being unable to work normally due to low pressure, thereby ensuring the basic functions of the equipment.

[0062] Furthermore, in order to stably control the workbench 50, the number and position of the clamping mechanisms can be set according to the clamping force required by the heavy-duty hydrostatic turntable, see Figure 4 As shown, the hydraulic assembly 10 in this embodiment includes a plurality of hydraulic assemblies 10, which are arranged on the base 60 at intervals along the circumference of the workbench 50; the first friction plate 31 and the second friction plate 32 each include a plurality of first friction plates 31, which are arranged on the base 60 at intervals along the circumference of the workbench 50 and are arranged one-to-one with the plurality of hydraulic assemblies 10, and the plurality of second friction plates 32 are connected to the plurality of hydraulic assemblies 10 one-to-one, and the main friction plate 33 is located between the first friction plates 31 and the second friction plates 32 which are arranged oppositely; wherein the plurality of hydraulic assemblies 10 are connected through the same oil passage 70, and one of the plurality of hydraulic assemblies 10 is connected to the hydraulic station through an oil supply passage (not shown in the drawings). Exemplarily, the hydraulic assembly 10, the first friction plate 31 and the second friction plate 32 in this embodiment can be set to two, or to three or more. The drawings of this embodiment show the situation when the hydraulic assembly 10, the first friction plate 31 and the second friction plate 32 are all set to eight.

[0063] Specifically, in this embodiment, a plurality of hydraulic components 10 are arranged at intervals along the circumference of the workbench 50, and the corresponding plurality of first friction plates 31 and second friction plates 32 are also distributed along the circumference. When the hydraulic components 10 are working, each hydraulic component 10 applies force to the corresponding second friction plate 32, so that the second friction plate 32 contacts with the main friction plate 33 to generate friction force. This circumferentially distributed structure can make the friction force evenly distributed in the circumferential direction of the workbench 50, avoiding uneven force on the workbench 50 caused by excessive local friction force. At the same time, since a plurality of friction plates are combined to participate in the work, the total friction force increases. When the workbench 50 needs to be braked, a plurality of hydraulic components 10 act at the same time, so that the plurality of second friction plates 32 are in close contact with the main friction plate 33. The generated large friction force can quickly stop the rotation of the workbench 50, effectively improving the reliability and stability of the clamping mechanism.

[0064] In addition, since the multiple hydraulic components 10 in this embodiment are connected through the same oil flow channel 70, and one of the multiple hydraulic components 10 is connected to the hydraulic station through the oil supply channel, the hydraulic oil of the hydraulic station flows into the hydraulic component 10 through the oil supply channel, and then flows into other hydraulic components 10 through the oil flow channel 70 to provide hydraulic oil to each hydraulic component 10. In other words, the multiple hydraulic components 10 in this embodiment share the hydraulic oil circuit, and multi-link hydraulic clamping control can be performed through only one oil flow channel 70, which effectively improves the clamping efficiency of the multiple hydraulic components 10.

[0065] Further, see Figure 1 As shown, the hydraulic cylinder body 11 in this embodiment includes a main body 111 and a bottom shell 112, the bottom shell 112 is detachably connected to the main body 111 and is surrounded by the main body 111 to form a receiving chamber 101, the bottom shell 112 has a mounting column 113, and an elastic member 20 is sleeved on the mounting column 113. The end of the hydraulic rod 12 close to the bottom shell 112 has a through hole 123, and the mounting column 113 is penetrated in the through hole 123 so that the hydraulic rod 12 abuts against the elastic member 20. Exemplarily, in this embodiment, the bottom shell 112 and the main body 111 can be connected by threaded connection, screw connection or clamping, and other deformation methods under the conception of this application are within the protection scope of this application.

[0066] Specifically, in this embodiment, the installation of the mounting column 113 realizes the precise positioning of the elastic member 20 between the hydraulic rod 12 and the bottom shell 112, ensuring that the elastic member 20 will not deviate during operation and always remain in the correct position, thereby ensuring that the elastic force can stably act on the hydraulic rod 12. At the same time, when the hydraulic rod 12 is subjected to the pressure of hydraulic oil or other external forces, the hydraulic rod 12 will abut against the elastic member 20, and the elastic member 20 can effectively transmit and buffer these forces, prevent the hydraulic assembly 10 from being damaged, and extend the service life of the hydraulic assembly 10. In addition, since the bottom shell 112 in this embodiment is detachably connected to the main body 111, it is convenient to install and remove the elastic member 20. When the elastic member 20 needs to be replaced, it is only necessary to remove the bottom shell 112, and the elastic member 20 sleeved on the mounting column 113 can be easily removed, which reduces the difficulty of operation.

[0067] Furthermore, the elastic member 20 in this embodiment includes a disc spring, and the disc spring is arranged at the bottom of the accommodating cavity 101 in an overlapping, matched or composite superimposed manner.

[0068] Specifically, disc springs can store energy and release it when needed. They can withstand extremely large loads in a small space, and their deformation is relatively small when subjected to large loads, and they have high stiffness.

[0069] The disc spring can be arranged at the bottom of the accommodating cavity 101 in a stacked, matched or composite manner. Stacking refers to a combination of disc springs stacked one after another in the axial direction. In the stacked manner, the relationship between the load (Pz) of the disc spring group and the load (P) of a single disc spring is Pz=nP, where n is the number of disc springs. This means that the load that the stacked disc spring group can withstand is n times the load of a single disc spring. For example, if a single disc spring can withstand a force of 50N, when three disc springs are stacked, the disc spring group can withstand a force of 150N (3×50N). When stacked, the deformation (f) of the disc spring group is equal to the deformation (f1) of a single disc spring, because the disc springs are stacked in sequence and their deformation is synchronous.

[0070] The combination of disc springs is a combination of disc springs placed side by side along the axial direction. The relationship between the load of the disc spring group (Hz) and the load of a single disc spring (H) is Hz = nH, where n is also the number of disc springs. It is worth noting that the H here may be different from the P in the superposition in value, because the load capacity of the disc spring is related to its placement and structure. For example, a single disc spring can withstand a force of 30N when placed in a pair. When there are 4 disc springs in a pair, the disc spring group can withstand a force of 120N (4×30N). In the pairing mode, the deformation of the disc spring group is n times the deformation of a single disc spring. This is because the disc springs are placed side by side, so their deformation is cumulative.

[0071] Composite is a disc spring combination that combines the overlapping and matching methods. The load of the disc spring group satisfies both Pz=nP (reflected in the overlapping part) and Hz=nH (reflected in the matching part). This combination can adjust the load capacity and deformation characteristics of the disc spring group according to actual needs. For example, in a composite disc spring group, there are 2 groups of overlapping, each group of overlapping has 3 disc springs, and there are 2 groups of matching. The load capacity and deformation of such a composite disc spring group are jointly determined by the overlapping and matching parts. The deformation of the composite disc spring group is jointly determined by the deformation of the overlapping part and the matching part, which includes the characteristics of synchronous deformation of the overlapping part and the characteristics of cumulative deformation of the matching part.

[0072] In combination with the above content, it can be known that no matter which stacking method is used for the disc spring, it has a high space utilization rate. In the limited space at the bottom of the accommodating cavity 101, by reasonably selecting the stacking method of the disc spring, the space in the accommodating cavity 101 can be utilized to the maximum extent while meeting the elastic performance requirements.

[0073] On the other hand, see Figure 5 As shown, the embodiment of the present application also provides a control method for a clamping mechanism for a hydrostatic turntable, and the control method for the clamping mechanism for a hydrostatic turntable includes the above-mentioned clamping mechanism for a hydrostatic turntable, and therefore, the control method for the clamping mechanism for a hydrostatic turntable includes all the technical effects of the above-mentioned clamping mechanism for a hydrostatic turntable. Since the technical effects of the clamping mechanism for a hydrostatic turntable have been described in detail above, they will not be repeated here.

[0074] Specifically, see Figure 5 As shown, the control method for the clamping mechanism of the hydrostatic turntable in this embodiment includes the following steps:

[0075] Step S1: Control the hydraulic rod 12 to be in the first state by adjusting the nut 41 to pre-tighten the elastic member 20 so that the second friction plate 32 is in the first position.

[0076] When the workbench 50 needs to be clamped and locked, it is only necessary to rotate the adjusting nut 41 to move the adjusting nut 41 toward the hydraulic rod 12, so that the hydraulic rod 12 can move toward the elastic member 20, and then the elastic member 20 can be pre-compressed. At this time, the elastic member 20 in the pre-compressed state will transmit the reaction force to the hydraulic rod 12, thereby driving the hydraulic rod 12 to move toward the main friction plate 33, and then driving the second friction plate 32 to abut against the main friction plate 33, and locking the main friction plate 33 between the first friction plate 31 and the second friction plate 32, so as to achieve the purpose of clamping the workbench 50. The entire adjustment process does not require the participation of the power system or the hydraulic system, so that the hydrostatic turntable can still keep the workbench 50 in a clamped state even in the event of power outage or hydraulic system failure, effectively preventing the workbench 50 from accidentally moving or rotating, and improving the safety and reliability of the hydrostatic turntable.

[0077] Step S2: Control the hydraulic rod 12 to be in the second state through the hydraulic oil to continuously compress the elastic member 20 so that the second friction plate 32 is in the second position.

[0078] Specifically, when it is necessary to loosen the workbench 50, it is only necessary to input the hydraulic oil of the hydraulic station into the accommodating chamber 101 through the oil inlet channel 131. The hydraulic oil will flow into the pre-compression space 102 in the accommodating chamber 101 to contact the outer flange 122. At this time, the outer flange 122 will drive the hydraulic rod 12 to move toward the direction close to the elastic member 20 under the action of the gravity of the hydraulic oil, thereby compressing the elastic member 20, and then driving the second friction plate 32 to separate from the main friction plate 33, and finally achieving the purpose of loosening the workbench 50.

[0079] Furthermore, before executing step S1, the stacking method of the elastic member 20 is selected. The step of selecting the stacking method of the elastic member 20 includes: calculating the maximum load force P of the elastic member 20 C The preload pressure P1 of the elastic member 20 is set according to P1 and P C The ratio of determines the number of elastic members 20, and determines the stacking method of the elastic members 20, wherein P C =(4*E*t 2 *h0*K4 2 ) / [(1-μ 2 )*K1*D 2 ], where E is the elastic modulus, t is the thickness of the elastic member 20, h0 is the calculated value of the deformation of the elastic member 20 without a supporting surface when flattened, K4 is the calculation coefficient, μ is the Poisson's ratio, K1 is the calculation coefficient, and D is the outer diameter of the elastic member 20. It should be noted that the unit of E is N / mm, and the value of E is 2.06*10 5N / mm, the unit of t is mm, the unit of h0 is mm, the unit of D is mm, and μ=0.3. It should be noted that the number of overlapping elastic members 20 needs to be determined according to the installation space of the elastic members 20 at the bottom of the accommodating cavity 101 .

[0080] Specifically, in this embodiment, when t=1.75 mm, h0=0.7 mm, D=31.5 mm, K1=0.682, K4=1, E=2.06*10 5 When N / mm and μ=0.3, P C is 5020N. At this time, the number of overlaps of the elastic member 20 is set to 3, and the total load value of the elastic member 20 is 3P C =15060N. Figure 6 It can be known that when F / P C =4000 / 15060=0.266, f / h0=0.34. At this time, the deformation amount of the elastic member 20 under load is F0=0.34*0.7=0.238mm, and the total deformation amount is 3F0=3*0.238=0.714mm.

[0081] Further, in step S2, when the hydraulic oil controls the hydraulic rod 12 to be in the second state, the predetermined pressure F applied by the hydraulic oil to the hydraulic rod 12 in the pre-compression space 102 satisfies the relationship: F ​​= Ae*B-P1, wherein Ae is the area of ​​the hydraulic oil acting on the outer flange 122, B is the working pressure of the hydraulic cylinder 11, and P1 is the pre-compression force of the elastic member 20. It should be noted that the unit of Ae is mm 2 , the unit of B is Pa, and the unit of P1 is N.

[0082] Specifically, since the present application controls the clamping mechanism to release the workbench 50 through the hydraulic system, in the process of releasing the workbench 50, it is necessary to apply a downward force to the hydraulic rod 12 to separate the second friction plate 32 from the main friction plate 33. Therefore, in this embodiment, the predetermined pressure applied by the hydraulic rod 12 is set so that the predetermined pressure F satisfies the relationship: F ​​= Ae*B-P1. In this way, the deformation amount of the elastic member 20 can be obtained according to the predetermined pressure, so that the deformation amount of the elastic member 20 can be controlled. C ,Check Figure 6 The deformation amount of the elastic member 20 can be known.

[0083] Specifically, in this embodiment, when Ae is 1107 mm 2 , B is 9*10 6 When Pa and P1 are 4000N, F=1107*10 -6 *9*10 6 -4000 = 5963 N. Since the deformation of the elastic member 20 needs to be based on F / PC To determine, therefore, according to P C =(4*E*t 2 *h0*K4 2 ) / [(1-μ 2 )*K1*D 2 ] Calculate P C Specific values, where t = 1.75 mm, h0 = 0.7 mm, D = 31.5 mm, K1 = 0.682, K4 = 1, E = 2.06*10 5 When N / mm and μ=0.3, P C is 5020N. At this time, the number of overlaps of the elastic member 20 is set to 3, and the total load value of the elastic member 20 is 3P C =15060N, F / P C =5963 / 15060=0.396, according to Figure 6 It can be known that f / h0=0.44. At this time, the deformation amount of the elastic member 20 under load is f0=0.44*0.7=0.308mm, and the total deformation amount is 0.308*3=0.924mm.

[0084] In combination with the above-mentioned embodiments, it can be known that the present application adopts the disc spring pre-tightening method to achieve the clamping of the workbench 50. Even in the case of power outage or hydraulic system failure, the disc spring has a spring force, which can still keep the workbench 50 in a clamped state, effectively preventing the workbench 50 from accidentally moving or rotating, thereby improving the safety and reliability of the hydrostatic turntable. At the same time, the present application can accurately control the compression deformation of the disc spring by changing the relative displacement between the adjusting nut 41 and the second friction plate 32, thereby achieving precise adjustment of the clamping force. This adjustment method enables the clamping mechanism to adapt to the needs under different working conditions, ensuring that the workbench 50 has sufficient stability and precision in the clamped state. In addition, when the workbench 50 needs to be loosened, the hydraulic oil enters the hydraulic cylinder body 11 through the oil inlet channel 131, pushes the hydraulic rod 12 downward and compresses the disc spring, so that the second friction plate 32 is separated from the main friction plate 33, thereby achieving a fast and efficient loosening operation, effectively improving the operating efficiency.

[0085] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0086] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0087] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A clamping mechanism for a hydrostatic turntable, the hydrostatic turntable comprising a worktable (50) and a base (60), the worktable (50) being rotatably disposed on the base (60), characterized in that: The clamping mechanism comprises: A hydraulic assembly (10), the hydraulic assembly (10) being arranged on the base (60), the hydraulic assembly (10) comprising a hydraulic cylinder body (11) and a hydraulic rod (12), the hydraulic cylinder body (11) having a receiving chamber (101), an elastic member (20) being arranged at the bottom of the receiving chamber (101), the hydraulic rod (12) being slidably arranged in the receiving chamber (101) and abutting against the elastic member (20); A friction assembly (30), wherein the friction assembly (30) is arranged between the workbench (50) and the base (60), and the friction assembly (30) comprises a first friction plate (31), a second friction plate (32) and a main friction plate (33), wherein the first friction plate (31) is fixedly arranged on the base (60), the second friction plate (32) is connected to an end of the hydraulic rod (12) away from the elastic member (20), and the main friction plate (33) is arranged on the workbench (50) and located between the first friction plate (31) and the second friction plate (32); The second friction plate (32) has a first position in which it contacts the main friction plate (33) to lock the main friction plate (33) onto the first friction plate (31) and locks the workbench (50), and the elastic member (20) is configured to be pre-tightened when the hydrostatic turntable is in an initial state so that the second friction plate (32) is in the first position.

2. The clamping mechanism for a hydrostatic turntable according to claim 1, characterized in that: The clamping mechanism also includes a pre-compression member (40), which is movably arranged between the second friction plate (32) and the hydraulic rod (12). The hydraulic rod (12) has a first state in which it moves toward the elastic member (20) under the compression action of the pre-compression member (40) to pre-compress the elastic member (20) so that the second friction plate (32) is in the first position.

3. The clamping mechanism for a hydrostatic turntable according to claim 2, characterized in that: A threaded hole (121) is provided at one end of the hydraulic rod (12) close to the second friction plate (32); A connecting rod (34) is provided on one side of the second friction plate (32) close to the hydraulic assembly (10), the connecting rod (34) extends in a direction away from the second friction plate (32), and a threaded section (341) matching the threaded hole (121) is provided on the outer surface of the connecting rod (34), at least a portion of the connecting rod (34) is connected to the threaded hole (121) through the threaded section (341), so that the second friction plate (32) is connected to the hydraulic rod (12); The pre-compression member (40) comprises an adjusting nut (41), which is rotatably sleeved on the connecting rod (34) and can reciprocate along the length direction of the connecting rod (34), wherein when the adjusting nut (41) moves along the length direction of the connecting rod (34) toward the hydraulic rod (12), the hydraulic rod (12) can be placed in the first state.

4. The clamping mechanism for a hydrostatic turntable according to claim 3, characterized in that: The connecting rod (34) has an external section (342) extending out of the threaded hole (121); the adjusting nut (41) is located on the external section (342) and has an adjusting gap (401) with the second friction plate (32); The width of the adjustment gap (401) is smaller than the length of the external section (342), and the minimum value A of the width of the adjustment gap (401) satisfies the relationship: 5mm≤A≤10mm.

5. The clamping mechanism for a hydrostatic turntable according to claim 1, characterized in that: The second friction plate (32) also has a second position separated from the main friction plate (33) to allow the workbench (50) to rotate; The hydraulic rod (12) has a second state in which it moves in the direction of the elastic member (20) to continuously compress the elastic member (20) so that the second friction plate (32) is in the second position.

6. The clamping mechanism for a hydrostatic turntable according to claim 5, characterized in that: The hydraulic rod (12) is provided with an outer flange (122), the outer flange (122) is arranged around the outer surface of the hydraulic rod (12) along the circumference of the hydraulic rod (12), and the outer flange (122) is located in the accommodating cavity (101), and a pre-compression space (102) is provided between a side of the outer flange (122) close to the second friction plate (32) and the hydraulic cylinder body (11); The hydraulic assembly (10) further comprises a fixing seat (13), wherein the fixing seat (13) is arranged on the base (60), the hydraulic cylinder body (11) is connected to the fixing seat (13), an oil inlet passage (131) is arranged on the fixing seat (13), the oil inlet passage (131) is connected between the accommodating chamber (101) and the hydraulic station, the hydraulic oil of the hydraulic station enters the accommodating chamber (101) through the oil inlet passage (131) and flows to the pre-compression space (102), and the hydraulic oil in the pre-compression space (102) applies a predetermined pressure to the hydraulic rod (12), so that the hydraulic rod (12) is in the second state.

7. The clamping mechanism for a hydrostatic turntable according to claim 6, characterized in that: The oil inlet channel (131) is connected to the hydraulic station via an oil supply channel, and a pressure regulating valve is provided on the oil supply channel. The pressure regulating valve is at least used to regulate the pressure of the hydraulic oil entering the oil inlet channel (131).

8. The clamping mechanism for a hydrostatic turntable according to claim 1, characterized in that: The hydraulic assembly (10) comprises a plurality of hydraulic assemblies (10), and the plurality of hydraulic assemblies (10) are arranged on the base (60) at intervals along the circumference of the workbench (50); The first friction plate (31) and the second friction plate (32) each include a plurality of first friction plates (31), the plurality of first friction plates (31) are arranged on the base (60) at intervals along the circumference of the workbench (50) and are arranged one-to-one with the plurality of hydraulic components (10), the plurality of second friction plates (32) are connected one-to-one with the plurality of hydraulic components (10), and the main friction plate (33) is located between the first friction plate (31) and the second friction plate (32) which are arranged opposite to each other; Wherein, the plurality of hydraulic components (10) are connected to each other through the same oil flow channel (70), and one of the plurality of hydraulic components (10) is connected to the hydraulic station through an oil supply channel.

9. The clamping mechanism for a hydrostatic turntable according to claim 1, characterized in that: The hydraulic cylinder body (11) comprises a main body (111) and a bottom shell (112); the bottom shell (112) is detachably connected to the main body (111) and is arranged together with the main body (111) to form the accommodating chamber (101); the bottom shell (112) has a mounting column (113); the elastic member (20) is sleeved on the mounting column (113); the hydraulic rod (12) has a through hole (123) at one end close to the bottom shell (112); the mounting column (113) is inserted into the through hole (123) so that the hydraulic rod (12) abuts against the elastic member (20).

10. The clamping mechanism for a hydrostatic turntable according to any one of claims 1 to 9, characterized in that: The elastic member (20) comprises a disc spring, and the disc spring is arranged at the bottom of the accommodating cavity (101) in an overlapping, matched or composite superimposed manner.

11. A control method for a clamping mechanism of a hydrostatic turntable, characterized in that: The control method for the clamping mechanism for the hydrostatic turntable comprises the clamping mechanism for the hydrostatic turntable according to any one of claims 1 to 10, and the control method for the clamping mechanism for the hydrostatic turntable comprises: Step S1: controlling the hydraulic rod (12) to be in a first state by adjusting the nut (41) to pre-tighten the elastic member (20) so that the second friction plate (32) is in the first position; Step S2: controlling the hydraulic rod (12) to be in a second state through hydraulic oil to continuously compress the elastic member (20) so that the second friction plate (32) is in a second position.

12. The control method for the clamping mechanism of the hydrostatic turntable according to claim 11, characterized in that: Before executing step S1, a stacking method of the elastic member (20) is selected, and the step of selecting the stacking method of the elastic member (20) comprises: Calculate the maximum load force P of the elastic member (20) C The preload pressure P1 of the elastic member (20) is set according to P1 and P C The ratio of determines the number of the elastic members (20), and determines the stacking method of the elastic members (20), wherein P C =(4*E*t 2 *h0*K4 2 ) / [(1-μ 2 )*K1*D 2 ], wherein E is the elastic modulus, t is the thickness of the elastic member (20), h0 is the calculated value of the deformation of the elastic member (20) without a supporting surface when flattened, K4 is the calculation coefficient, μ is the Poisson's ratio, K1 is the calculation coefficient, and D is the outer diameter of the elastic member (20); and / or, In step S2, when the hydraulic oil controls the hydraulic rod (12) to be in the second state, the predetermined pressure F applied by the hydraulic oil to the hydraulic rod (12) in the pre-compression space (102) satisfies the relationship: F=Ae*B-P1, wherein Ae is the area of ​​the hydraulic oil acting on the outer flange (122), B is the working pressure of the hydraulic cylinder (11), and P1 is the pre-compression force of the elastic member (20).

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