Measuring device and method for measuring assembly clearance of hydrostatic guide rails

Abstract

This application discloses a measuring device and method for measuring the assembly clearance of a hydrostatic guide rail. The measuring device includes a base, a pressure plate, a hydrostatic guide rail, a pressure sensing element, and an oil tank. A groove is formed between the pressure plate and the guide rail surface; the hydrostatic guide rail is slidably installed in the groove. A first oil chamber is provided on the side of the hydrostatic guide rail near the pressure plate, and a second oil chamber is provided on the side of the hydrostatic guide rail near the guide rail surface. The hydrostatic guide rail also includes a first hydraulic oil channel and a second hydraulic oil channel. The first hydraulic oil channel includes a first inlet and a first outlet, and the second hydraulic oil channel includes a second inlet and a second outlet. Connecting plugs are provided at the first and second inlets, and throttling capillary tubes are installed on the connecting plugs. The pressure sensing element is used to measure the pressure in the first oil chamber. The oil tank is connected to the connecting plugs. This application can solve the problem of low measurement efficiency in existing methods for measuring the assembly clearance of hydrostatic guide rails.

Description

Technical Field

[0001] This application relates to the field of hydrostatic guide rail assembly clearance measurement technology, and more specifically, to a measuring device and method for measuring hydrostatic guide rail assembly clearance. Background Technology

[0002] Hydrostatic guides are high-precision linear guides that use pressurized liquid to provide support. Due to their advantages such as high precision, high rigidity, low friction, and low wear, they are widely used in industrial automation, semiconductor manufacturing, and precision machining.

[0003] For closed hydrostatic guideways, the quality of assembly has a significant impact on performance. In particular, the assembly clearance between the pressure plate and the guideway plays a crucial role in the oil film stiffness and motion stability of the hydrostatic slider.

[0004] Currently, in the assembly process of hydrostatic guideways, the conventional methods for measuring the assembly clearance between the pressure plate and the guideway are mainly through precision gauge blocks or coordinate measuring machines (CMMs). Both methods have shortcomings. Using precision gauge blocks requires continuously adding or removing gauges, and since guideways are generally long, this method typically only measures the assembly clearance at one or a few points, failing to obtain overall assembly clearance data for the guideway. This results in low efficiency, incomplete results, and consequently, low reliability. Using a CMM is generally limited by the size, shape, and space constraints of the measured part, making it inconvenient or even impossible to measure. Summary of the Invention

[0005] The main objective of this application is to provide a measuring device and method for measuring the assembly clearance of hydrostatic guide rails, so as to solve the problem of low measurement efficiency in the existing measuring methods for measuring the assembly clearance of hydrostatic guide rails.

[0006] According to one aspect of this application, a measuring device for measuring the assembly clearance of a hydrostatic guide rail is provided, comprising:

[0007] A base, wherein a boss and a guide rail surface are provided on the base, and the guide rail surface is located on the side of the bottom of the boss;

[0008] A pressure plate is fixedly mounted on the boss, and the pressure plate protrudes from the outer edge of the boss. A groove is provided between the pressure plate and the guide rail surface.

[0009] A hydrostatic guide rail is slidably installed in the slide groove. A first oil chamber is provided on the side of the hydrostatic guide rail near the pressure plate, and a second oil chamber is provided on the side of the hydrostatic guide rail near the guide rail surface. The hydrostatic guide rail also includes a first hydraulic oil channel and a second hydraulic oil channel. The first hydraulic oil channel includes a first inlet and a first outlet. The first inlet is located on the side wall of the hydrostatic guide rail, and the first outlet is located at the bottom of the first oil chamber. The second hydraulic oil channel includes a second inlet and a second outlet. The second inlet is located on the side wall of the hydrostatic guide rail, and the second outlet is located at the bottom of the second oil chamber. A connecting plug is provided at both the first and second inlets, and a throttling capillary tube is provided along the length of the connecting plug.

[0010] A pressure sensing element, wherein the pressure sensing element is used to measure the pressure in the first oil chamber;

[0011] An oil tank is provided, which is connected to the connecting plug.

[0012] Furthermore, the measuring device also includes a connecting joint, with a connecting plug disposed at the end of the connecting joint, and the oil tank is connected to the connecting joint via a pipeline.

[0013] Furthermore, a pressure measuring hole is provided on the hydrostatic guide rail, the pressure measuring hole is connected to the first oil chamber, and the pressure detection element is disposed at the pressure measuring hole.

[0014] Furthermore, the pressure sensing element includes a pressure gauge.

[0015] Furthermore, the measuring device for measuring the assembly clearance of the hydrostatic guide rail also includes a sealing ring, and the connecting plug is sealed to the first oil inlet and the second oil inlet through the sealing ring.

[0016] On the other hand, this application also provides a method for measuring the assembly clearance of a hydrostatic guide rail, wherein the measurement method is performed using the aforementioned measuring device, and the measurement method includes:

[0017] Step S1: Move the hydrostatic guide rail along the slide to the predetermined position of the slide;

[0018] Step S2: Supply oil to the hydrostatic guide rail using the oil tank, and use the pressure detection element to detect the pressure in the first oil chamber;

[0019] Step S3: Calculate the gap h between the first oil chamber and the pressure plate, and the gap h2 between the second oil chamber and the guide rail surface;

[0020] Step S4: Add the gap h between the first oil chamber and the pressure plate, the gap h2 between the second oil chamber and the guide rail surface, and the thickness H of the hydrostatic guide rail to obtain the assembly gap K of the current position of the hydrostatic guide rail.

[0021] Further, in step S3,

[0022] Using formula The gap between the first oil chamber of the hydrostatic guide rail and the pressure plate at the current position is calculated, where h is the gap between the first oil chamber of the hydrostatic guide rail and the pressure plate. The oil supply pressure of the oil tank is [insert pressure here]. The pressure detected by the pressure sensing element. Where π is the viscosity of the hydraulic oil, π is a constant, and de is the inner diameter of the throttling capillary. le The length of the connecting plug, Let be the flow coefficient of the first oil chamber, where .

[0023] Furthermore, the flow coefficient of the first oil chamber Using formula The calculation yielded that, L The length of the long side of the hydrostatic guide rail is given. l The length of the longer side of the first oil cavity. B The length of the short side of the hydrostatic guide rail is given. b The length of the shorter side of the first oil cavity.

[0024] Furthermore, the measurement method also includes:

[0025] Step S5: Move the hydrostatic guide rail to another position of the slide groove, and repeat the process of steps S1 to S4 until the assembly clearance of the hydrostatic guide rail at each position in the length direction of the slide groove is measured and calculated.

[0026] In this application, the measuring device works by calculating the guide rail assembly clearance based on the variable relationship between internal pressure, liquid resistance, and flow rate of the hydrostatic system. In actual measurement, continuous measurement of the entire hydrostatic guide rail is possible, resulting in highly reliable and efficient results. Furthermore, the measuring device has a simple structure and is not limited by the size, shape, or space constraints of the measured component. Attached Figure Description

[0027] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0028] Figure 1 This is an exploded view of the hydrostatic guide rail, connecting joint, and connecting plug portion disclosed in the embodiments of this application;

[0029] Figure 2 This is a schematic diagram of the hydrostatic guide rail disclosed in the embodiments of this application;

[0030] Figure 3 This is a schematic diagram of the structure of the base after partial cutting, as disclosed in an embodiment of this application;

[0031] Figure 4 This is a connection diagram of the measuring device for measuring the assembly clearance of a hydrostatic guide rail disclosed in an embodiment of this application;

[0032] Figure 5 for Figure 4 Enlarged view of the central base section;

[0033] Figure 6 This is a schematic diagram of the structure of the connecting plug disclosed in an embodiment of this application;

[0034] Figure 7 This is a flowchart of a measurement method for measuring the assembly clearance of a hydrostatic guide rail, as disclosed in an embodiment of this application.

[0035] The above figures include the following reference numerals:

[0036] 10. Base; 11. Boss; 12. Guide rail surface; 101. Slide groove; 20. Pressure plate; 30. Hydrostatic guide rail; 31. First oil chamber; 32. Second oil chamber; 33. First hydraulic oil channel; 331. First oil inlet; 332. First oil outlet; 34. Second hydraulic oil channel; 341. Second oil inlet; 342. Second oil outlet; 35. Pressure measuring hole; 40. Connecting plug; 41. Throttling capillary tube; 50. Pressure detection element; 60. Oil tank; 70. Sealing ring; 80. First oil filter; 90. Second oil filter; 100. Overflow valve; 110. Electric motor; 120. Oil pump; 140. Connecting joint; 150. Third oil filter. Detailed Implementation

[0037] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0038] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0039] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0040] See Figures 1 to 6 As shown in the embodiment of this application, a measuring device for measuring the assembly clearance of a hydrostatic guide rail is provided, hereinafter referred to as the measuring device. The measuring device includes a base 10, a pressure plate 20, a hydrostatic guide rail 30, a pressure sensing element 50, and an oil tank 60.

[0041] The base 10 has a boss 11 and a guide rail surface 12, with the guide rail surface 12 located on the side of the bottom of the boss 11. A pressure plate 20 is fixedly mounted on the boss 11 and protrudes from the outer edge of the boss 11. A groove 101 is provided between the pressure plate 20 and the guide rail surface 12. A hydrostatic guide rail 30 is slidably mounted in the groove 101. A first oil cavity 31 is provided on the side of the hydrostatic guide rail 30 near the pressure plate 20, and a second oil cavity 32 is provided on the side of the hydrostatic guide rail 30 near the guide rail surface 12. The hydrostatic guide rail 30 also includes a first hydraulic oil channel 33 and a second hydraulic oil channel 34. The first hydraulic oil channel 33 includes a first oil inlet 331. The first oil outlet 332 and the first oil inlet 331 are located on the side wall of the hydrostatic guide rail 30, and the first oil outlet 332 is located at the bottom of the first oil chamber 31. The second hydraulic oil channel 34 includes a second oil inlet 341 and a second oil outlet 342. The second oil inlet 341 is located on the side wall of the hydrostatic guide rail 30, and the second oil outlet 342 is located at the bottom of the second oil chamber 32. A connecting plug 40 is provided at both the first oil inlet 331 and the second oil inlet 341. A throttling capillary tube 41 is provided along the length of the connecting plug 40. The pressure detection element 50 is used to measure the first oil chamber 31. The oil tank 60 is connected to the connecting plug 40.

[0042] When measuring the assembly clearance of the hydrostatic guide rail 30 using the measuring device in this embodiment, the hydrostatic guide rail 30 is first moved to the predetermined position of the slide groove 101. Then, the hydraulic oil in the oil tank 60 is delivered to the connecting plug 40. After passing through the throttling capillary tube 41 on the connecting plug 40, the hydraulic oil enters the first hydraulic oil channel 33 and the second hydraulic oil channel 34, and then enters the first oil chamber 31 and the second oil chamber 32, respectively. At this time, the pressure in the first oil chamber 31 can be measured by the action of the pressure detection element 50.

[0043] In actual measurement, the assembly clearance is calculated based on the throttling and pressure-splitting principle of the throttling device and the variable relationship between its internal pressure, flow rate, and liquid resistance. Based on the pressure-splitting principle of the throttling device, the clearance h between the first oil chamber 31 and the pressure plate 20, and the clearance h2 between the second oil chamber 32 and the guide rail surface 12 can be calculated. Then, the thickness H of the hydrostatic guide rail 30 is measured separately. Finally, the three dimensions are added together to obtain the assembly clearance K between the pressure plate 20 and the guide rail surface 12 at the current position.

[0044] Specifically, the thickness H of the hydrostatic guide rail 30, i.e., the distance between the upper and lower end faces of the hydrostatic guide rail 30, is first measured. The upper and lower end faces of the hydrostatic guide rail 30 have a first oil cavity 31 and a second oil cavity 32 of the same size, i.e., opposing oil cavities with equal area. During the test, the hydrostatic guide rail 30 does not bear any load other than the downward pressure from the pressure plate 20. Furthermore, since the weight of the hydrostatic guide rail 30 is very small relative to the supporting force and downward pressure, its weight can be ignored. Considering the above factors, it can be concluded that the gap h between the first oil cavity 31 and the pressure plate 20 and the gap h2 between the second oil cavity 32 and the guide rail surface 12 are equal during the test, i.e., the hydrostatic guide rail 30 is in the middle position between the pressure plate 20 and the base 10, h = h2. Therefore, by measuring the oil cavity support gap at one end, the oil cavity support gap at the other end can be known. This application focuses on measuring only the gap h between the first oil cavity 31 and the pressure plate 20. Simultaneously, the following measurements are also taken... Figure 6 The length of the throttling capillary 41 of the connecting plug 40 shown le and the inner diameter of the throttling capillary 41 de .

[0045] First, the dimensions of the first oil chamber 31 of the hydrostatic guide rail 30 were measured, among which... ，L This refers to the length of the long side of the hydrostatic guide rail 30. l The length of the long side of the first oil cavity 31 B This is the length of the short side of the hydrostatic guide rail 30. b This is the length of the shorter side of the first oil chamber 31. At this time, the flow coefficient of the first oil chamber 31... Using formula Calculated.

[0046] Based on the condition that the flow rates through the connecting plug 40 and the first oil chamber 31 are equal, the following equations can be derived, and the formula for calculating the gap h between the first oil chamber 31 and the pressure plate 20 can be obtained:

[0047]

[0048] Based on the above formula derivation, Where h is the gap between the first oil chamber 31 of the hydrostatic guide rail 30 and the pressure plate 20. The oil supply pressure for the oil tank is 60. The pressure detected by the pressure sensing element 50 This refers to the viscosity of the hydraulic oil, where π is a constant and de is the inner diameter of the throttling capillary tube 41. le For the length of the connecting plug 40, is the flow coefficient of the first oil chamber 31.

[0049] After that, move the hydrostatic guide rail 30 to another position of the slide groove 101 and repeat the above process until the assembly clearance of the hydrostatic guide rail 30 at each position along the length of the slide groove 101 is measured and calculated.

[0050] As can be seen from the above process, the working principle of the measuring device in this application is to calculate the assembly clearance of the hydrostatic guide rail 30 based on the variable relationship between the internal pressure, liquid resistance, and flow rate of the hydrostatic system. In actual measurement, continuous measurement of the entire hydrostatic guide rail 30 can be performed, resulting in high reliability and measurement efficiency. Furthermore, the measuring device has a simple structure and is not affected by the size, shape, or space limitations of the measured part. This application not only solves the problems of low measurement efficiency, incomplete single-point or multi-point measurement range, and low result reliability, but also addresses the problem of low measurement efficiency or even inability to measure due to the influence of the size and shape of the measured part.

[0051] Furthermore, the measuring device also includes a connecting joint 140, with a connecting plug 40 disposed at the end of the connecting joint 140, and the oil tank 60 connected to the connecting joint 140 via a pipe. The connecting joint 140 facilitates the connection of the pipe to the connecting plug 40.

[0052] See Figure 2 As shown, the measuring device in this embodiment also includes a motor 110, an oil pump 120, a first oil filter 80, a second oil filter 90, a third oil filter 150, and a relief valve 100. Specifically, the first oil filter 80 is located between the oil tank 60 and the oil pump 120, and this first oil filter 80 is a suction oil filter. The motor 110 is electrically connected to the oil pump 120 to provide power to the oil pump 120. The second oil filter 90 is connected to the outlet end of the oil pump 120, and the third oil filter 150 is located at the outlet end of the second oil filter 90. The first oil filter 80 is a coarse oil filter, which facilitates the filtering out of larger impurities in the hydraulic oil, and the second oil filter 90 is a fine oil filter, which facilitates the filtering out of relatively small impurities in the hydraulic oil. The relief valve 100 is connected between the outlet end of the oil pump 120 and the oil tank 60 to improve the safety of the measuring device during operation in this embodiment.

[0053] To facilitate pressure detection within the first oil chamber 31 on the hydrostatic guide rail 30, a pressure measuring hole 35 is provided on the hydrostatic guide rail 30 in this embodiment. This pressure measuring hole 35 communicates with the first oil chamber 31, and the pressure detection element 50 is disposed at the pressure measuring hole 35 to facilitate pressure detection in the first oil chamber 31. Of course, in other embodiments of this application, the pressure measuring hole 35 communicates with the second oil chamber 32. In this case, the pressure detected by the pressure detection element 50 is the pressure of the second oil chamber 32. Any other modifications within the scope of this application's concept are within the protection scope of this application.

[0054] Optionally, the pressure detection element 50 in this embodiment includes a pressure gauge, which has a simple structure and is easy to set up.

[0055] Furthermore, the measuring device in this embodiment also includes a sealing ring 70. The connecting plug 40 is sealed to the first oil inlet 331 or the second oil inlet 341 through the sealing ring 70, which facilitates ensuring the sealing performance of the entire measuring device. Optionally, the sealing ring 70 in this embodiment can be a rubber ring, silicone ring, etc.

[0056] Combination Figures 1 to 7 As shown, according to another aspect of this application, a method for measuring the assembly clearance of a hydrostatic guide rail is provided. This method is performed using the measuring device described in the above embodiments.

[0057] Specifically, the measurement method includes:

[0058] Step S1: Move the hydrostatic guide rail 30 along the slide groove 101 to the predetermined position of the slide groove 101.

[0059] Step S2: Use the oil tank 60 to supply oil to the hydrostatic guide rail 30, and use the pressure detection element 50 to detect the pressure of the first oil chamber 31.

[0060] Step S3: Calculate the gap h between the first oil chamber 31 and the pressure plate 20, and the gap h2 between the second oil chamber 32 and the guide rail surface 12.

[0061] During the measurement process, the thickness H of the hydrostatic guide rail 30, i.e., the distance between the upper and lower end faces of the hydrostatic guide rail 30, is first measured. The upper and lower end faces of the hydrostatic guide rail 30 have a first oil cavity 31 and a second oil cavity 32 of the same size, i.e., opposing oil cavities with equal area. During the test, the hydrostatic guide rail 30 does not bear any load other than the downward pressure from the pressure plate 20. Furthermore, since the weight of the hydrostatic guide rail 30 is very small relative to the supporting force and downward pressure, its weight can be ignored. Considering these factors, it can be concluded that the gap h between the first oil cavity 31 and the pressure plate 20, and the gap h2 between the second oil cavity 32 and the guide rail surface 12, are equal during the test. That is, the hydrostatic guide rail 30 is located at the midpoint between the pressure plate 20 and the base 10, where h = h2. Further measurements are then taken... Figure 6 The length of the throttling capillary 41 of the connecting plug 40 shown le and the inner diameter of the throttling capillary 41 de .

[0062] In this step, based on the condition that the flow rates through the connecting plug 40 and the first oil chamber 31 are equal, the following equations can be derived, and the formula for calculating the gap h between the first oil chamber 31 and the pressure plate 20 can be obtained:

[0063]

[0064] Based on the above formula derivation, Where h is the gap between the first oil chamber 31 of the hydrostatic guide rail 30 and the pressure plate 20. The oil supply pressure for the oil tank is 60. The pressure detected by the pressure sensing element 50 This refers to the viscosity of the hydraulic oil, where π is a constant and de is the inner diameter of the throttling capillary tube 41. le For the length of the connecting plug 40, Let be the flow coefficient of the first oil chamber 31, where .

[0065] In this embodiment, the flow coefficient of the first oil chamber 31 Using formula Calculated.

[0066] in, L This refers to the length of the long side of the hydrostatic guide rail 30. l The length of the long side of the first oil cavity 31 B This is the length of the short side of the hydrostatic guide rail 30. b It is the length of the short side of the first oil cavity 31.

[0067] Step S4: By adding the gap h between the first oil chamber 31 and the pressure plate 20, the gap h2 between the second oil chamber 32 and the guide rail surface 12, and the thickness H of the hydrostatic guide rail 30, the assembly gap size K of the current position of the hydrostatic guide rail 30 is obtained, that is, K=2h+H.

[0068] Step S5: Move the hydrostatic guide rail 30 to another position of the slide groove 101, and repeat the process of steps S1 to S4 until the assembly clearance of the hydrostatic guide rail 30 at each position along the length of the slide groove 101 is measured and calculated.

[0069] As can be seen from the above process, the working principle of the measuring device in this application is to calculate the guide rail assembly clearance based on the variable relationship between internal pressure, liquid resistance, and flow rate of the hydrostatic system. In actual measurement, continuous measurement of the entire hydrostatic guide rail can be performed, resulting in highly reliable and efficient measurements. Furthermore, the measuring device has a simple structure and is not affected by the size, shape, or space limitations of the measured component.

[0070] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0071] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.

[0072] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A measuring device for measuring the assembly clearance of a hydrostatic guide rail, characterized in that, include: The base (10) is provided with a boss (11) and a guide rail surface (12), and the guide rail surface (12) is located on the side of the bottom of the boss (11); A pressure plate (20) is fixedly installed on the boss (11) and the pressure plate (20) protrudes from the outer edge of the boss (11). A groove (101) is provided between the pressure plate (20) and the guide rail surface (12). A hydrostatic guide rail (30) is slidably installed in the slide groove (101). A first oil chamber (31) is provided on the side of the hydrostatic guide rail (30) near the pressure plate (20), and a second oil chamber (32) is provided on the side of the hydrostatic guide rail (30) near the guide rail surface (12). The hydrostatic guide rail (30) also includes a first hydraulic oil channel (33) and a second hydraulic oil channel (34). The first hydraulic oil channel (33) includes a first oil inlet (331) and a first oil outlet (332). The first oil inlet (331) is located on the hydrostatic guide rail surface (101). On the side wall of the rail (30), the first oil outlet (332) is located at the bottom of the first oil chamber (31). The second hydraulic oil channel (34) includes a second oil inlet (341) and a second oil outlet (342). The second oil inlet (341) is located on the side wall of the hydrostatic guide rail (30), and the second oil outlet (342) is located at the bottom of the second oil chamber (32). A connecting plug (40) is provided at both the first oil inlet (331) and the second oil inlet (341). A throttling capillary tube (41) is provided in the length direction of the connecting plug (40). A pressure sensing element (50) is used to measure the pressure in the first oil chamber (31); The oil tank (60) is connected to the connecting plug (40).

2. The measuring device for measuring the assembly clearance of a hydrostatic guide rail according to claim 1, characterized in that, The measuring device also includes a connecting joint (140), the connecting plug (40) is disposed at the end of the connecting joint (140), and the oil tank (60) is connected to the connecting joint (140) through a pipe.

3. The measuring device for measuring the assembly clearance of a hydrostatic guide rail according to claim 1, characterized in that, The hydrostatic guide rail (30) is provided with a pressure measuring hole (35), which is connected to the first oil chamber (31), and the pressure detection element (50) is provided at the pressure measuring hole (35).

4. The measuring device for measuring the assembly clearance of a hydrostatic guide rail according to claim 3, characterized in that, The pressure sensing element (50) includes a pressure gauge.

5. The measuring device for measuring the assembly clearance of a hydrostatic guide rail according to any one of claims 1 to 4, characterized in that, The measuring device for measuring the assembly gap of the hydrostatic guide rail also includes a sealing ring (70), and the connecting plug (40) is sealed to the first oil inlet (331) and the second oil inlet (341) through the sealing ring (70).

6. A method for measuring the assembly clearance of a hydrostatic guide rail, characterized in that, The measurement method is performed using the measuring device according to any one of claims 1 to 5, and the measurement method includes: Step S1: Move the hydrostatic guide rail (30) along the slide groove (101) to a predetermined position in the slide groove (101); Step S2: Use the oil tank (60) to supply oil to the hydrostatic guide rail (30), and use the pressure detection element (50) to detect the pressure in the first oil chamber (31); Step S3: Calculate the gap h between the first oil cavity (31) and the pressure plate (20), and the gap h2 between the second oil cavity (32) and the guide rail surface (12); Step S4: The assembly gap K of the current position of the hydrostatic guide rail (30) is obtained by adding the gap h between the first oil cavity (31) and the pressure plate (20), the gap h2 between the second oil cavity (32) and the guide rail surface (12), and the thickness H of the hydrostatic guide rail (30).

7. The method for measuring the assembly clearance of a hydrostatic guide rail according to claim 6, characterized in that, In step S3, Using formula The gap between the first oil chamber (31) of the hydrostatic guide rail (30) and the pressure plate (20) at the current position is calculated, where h is the gap between the first oil chamber (31) of the hydrostatic guide rail (30) and the pressure plate (20). The oil supply pressure of the oil tank (60) is... The pressure detected by the pressure sensing element (50) Where π is the viscosity of the hydraulic oil, π is a constant, and de is the inner diameter of the throttling capillary (41). le The length of the connecting plug (40) Let be the flow coefficient of the first oil chamber (31), where .

8. The method for measuring the assembly clearance of a hydrostatic guide rail according to claim 7, characterized in that, Flow coefficient of the first oil chamber (31) Using formula The calculation yielded that, L The length of the long side of the hydrostatic guide rail (30) is given. l The length of the long side of the first oil cavity (31) is given. B The length of the short side of the hydrostatic guide rail (30) is given. b The length of the short side of the first oil cavity (31) is given.

9. The measuring method for measuring the assembly clearance of a hydrostatic guide rail according to any one of claims 6 to 8, characterized in that, The measurement method further includes: Step S5: Move the hydrostatic guide rail (30) to another position of the slide groove (101) and repeat the process from step S1 to step S4 until the assembly clearance of the hydrostatic guide rail (30) at each position along the length of the slide groove (101) is measured and calculated.

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