Hydrostatic guideway performance testing device and hydrostatic guideway performance testing method

Abstract

The invention discloses a hydrostatic guideway performance testing device and a hydrostatic guideway performance testing method, the testing device comprises a base, a limiting part, an oil supply assembly, a pressure reducing valve, a driving part, a detection assembly and a processor, the base is used for installing two guideways, a guideway groove is arranged between the two guideways, and the limiting part is arranged at the tops of the guideways. The oil supply assembly enables oil films to be generated between the static pressure sliding block and the inner wall face of the guide rail groove and between the static pressure sliding block and the limiting part. The pressure reducing valve is used for adjusting the pressure of the oil film between the limiting part and the static pressure sliding block. The driving part is used for driving the static pressure sliding block to slide in the guide rail groove. The processor is at least used for calculating the rigidity of the oil film, judging the bearing capacity of the static pressure sliding block through the rigidity of the oil film and judging whether the motion performance of the static pressure sliding block meets the standard or not through the temperature of oil in the static pressure sliding block and the flow of the oil in the static pressure sliding block. The static pressure guide rail performance testing device solves the problem that a static pressure guide rail performance testing device in the prior art cannot comprehensively test the performance of a static pressure sliding block.

Description

Technical Field

[0001] The present application relates to the technical field of hydrostatic guide rail performance testing, and in particular to a hydrostatic guide rail performance testing device and a hydrostatic guide rail performance testing method. Background Art

[0002] Existing hydrostatic guide rail performance testing devices, such as the hydrostatic guide rail performance testing device and testing method disclosed in Chinese patent CN117740519A, are not comprehensive enough in testing the performance of the hydrostatic slider due to structural limitations. Summary of the invention

[0003] The main purpose of the present application is to provide a hydrostatic guide rail performance testing device and a hydrostatic guide rail performance testing method, so as to at least solve the problem that the hydrostatic guide rail performance testing device in the prior art does not conduct comprehensive performance testing on the hydrostatic slider.

[0004] According to one aspect of the present application, a hydrostatic guide rail performance test device is provided, the hydrostatic guide rail comprising a guide rail and a hydrostatic slider, characterized in that the hydrostatic guide rail performance test device comprises:

[0005] A base, wherein the base is used to install two guide rails spaced apart along the width direction of the base, the guide rails extend along the length direction of the base, a guide rail groove is provided between the two guide rails, the guide rail groove extends along the length direction of the base, and the static pressure slider is movably installed in the guide rail groove;

[0006] A limiting portion, the limiting portion is arranged on the top of the guide rail;

[0007] An oil supply assembly, the oil supply assembly being in communication with the static pressure slider, so as to generate an oil film between the static pressure slider and the inner wall surface of the guide rail groove, and between the static pressure slider and the limiting portion;

[0008] a pressure reducing valve, the pressure reducing valve being in communication with the static pressure slider, the pressure reducing valve being used to adjust the pressure of the oil film between the limiting portion and the static pressure slider;

[0009] A driving part, the driving part is connected to the static pressure slider, and the driving part is used to drive the static pressure slider to slide in the guide rail groove;

[0010] a detection component, the detection component being arranged on the base, the detection component being used at least to detect the pressure of the oil between the limit portion and the hydrostatic slider, the thickness of the oil film, the temperature of the oil in the hydrostatic slider, the flow rate of the oil in the hydrostatic slider, and the moving speed of the hydrostatic slider;

[0011] A processor, wherein the processor is electrically connected to the detection component and the pressure reducing valve respectively, and the processor is used to at least calculate the rigidity of the oil film, and use the rigidity of the oil film to determine the load-bearing capacity of the hydrostatic slider, and determine whether the movement performance of the hydrostatic slider meets the standard through the temperature of the oil in the hydrostatic slider and the flow rate of the oil in the hydrostatic slider.

[0012] Furthermore, the limiting portion includes:

[0013] A cover plate, the cover plate is connected to the guide rail, and the cover plate extends along the length direction of the base;

[0014] A limit block is connected to a side of the cover plate relative to the guide rail, the limit block extends along the length direction of the base, and the limit block is located directly above the static pressure sliding block.

[0015] Further, the static pressure slider is provided with a plurality of the static pressure cavities, and at least one of the static pressure cavities is provided on the upper surface of the static pressure slider;

[0016] Wherein, along the height direction of the base, the projection surface of the static pressure cavity arranged on the upper surface of the static pressure sliding block is located within the projection surface of the limiting block.

[0017] Further, the limit block includes models of multiple different sizes, and the limit blocks of different models can be selectively and detachably connected to the cover plate; and / or,

[0018] Along the height direction of the base, there is a first gap between the limit block and the upper surface of the static pressure sliding block, and the limit block can move along the height direction of the base to adjust the width A of the first gap.

[0019] Furthermore, along the height direction of the base, there is a first gap between the limit block and the upper surface of the static pressure sliding block;

[0020] Wherein, along the height direction of the base, the width A of the first gap satisfies the relationship: 15 μm≤A≤30 μm.

[0021] Furthermore, the driving unit includes a linear motor, a slide rail of the linear motor is arranged on a side of the cover plate relative to the guide rail groove, and the slide rail extends along the length direction of the base, a slide body of the linear motor is slidably arranged on the slide rail, and the slide body is fixedly connected to the hydrostatic slider to drive the hydrostatic slider to slide in the guide rail groove.

[0022] Furthermore, the hydrostatic guide rail performance testing device further comprises a position information component, wherein the position information component is disposed between the guide rail and the hydrostatic slider, and the position information component is electrically connected to the processor.

[0023] Furthermore, the hydrostatic guide rail performance testing device also includes a damping buffer, and the damping buffer is arranged at both ends of the guide rail groove in the extension direction.

[0024] On the other hand, the present application provides a performance test method for a hydrostatic guide rail, the performance test method for the hydrostatic guide rail is performed using the above-mentioned hydrostatic guide rail performance test device, and the performance test method for the hydrostatic guide rail includes:

[0025] Step S1: adjusting the pressure reducing valve so that the bearing force P of the static pressure slider is a first test value, starting the driving unit, and when detecting that the movement speed V of the static pressure slider reaches a first predetermined value, detecting the flow rate q of the oil in the static pressure slider and the temperature T of the oil in the static pressure slider;

[0026] Step S2: If the flow rate q of the oil in the static pressure slider under the first test value is greater than or equal to the current temperature T and the flow threshold qi under the first test value, increase the first test value and execute step S1 again until the first test value gradually increases to a second predetermined value. If the flow rate q of the oil in the static pressure slider under the first test value in each test is greater than or equal to the current temperature T in the test and the flow threshold qi under the first test value, it is judged that the movement performance of the static pressure slider meets the standard; otherwise, it is judged that the movement performance of the static pressure slider does not meet the standard.

[0027] Furthermore, the performance testing method of the hydrostatic guide rail also includes:

[0028] Step S3: detecting the initial thickness H0 of the oil film, adjusting the pressure reducing valve so that the bearing force P on the static pressure slider is a second test value, detecting the thickness H1 of the oil film again, and calculating the stiffness K of the oil film under the second test value according to the second test value and the change value H0-H1 of the thickness of the oil film;

[0029] Step S4: If the stiffness K of the oil film at the second test value is greater than or equal to the oil film stiffness threshold Ki at the second test value, increase the second test value, and execute step S1 again until the second test value gradually increases to a third predetermined value. If the stiffness K of the oil film at the second test value in each test is greater than or equal to the oil film stiffness threshold Ki at the second test value in the test, it is judged that the load-bearing capacity of the static pressure slider meets the standard; otherwise, it is judged that the load-bearing capacity of the static pressure slider does not meet the standard.

[0030] Compared with the prior art, the hydrostatic guide performance test device of the present application first connects the hydrostatic slider with the oil supply assembly when testing the performance of the hydrostatic guide. At this time, there is an oil film between the hydrostatic slider and the guide groove, and between the hydrostatic slider and the limiter. When the load-bearing capacity of the hydrostatic guide is to be tested, the pressure reducing valve is adjusted to adjust the pressure of the oil film between the hydrostatic slider and the limiter to a predetermined pressure. Due to the influence of the interaction force, the oil film exerts a downward pressure on the hydrostatic slider in the height direction. At this time, the detection component detects the predetermined pressure and the thickness of the oil film between the bottom surface of the hydrostatic slider and the bottom surface of the guide groove, and then calculates the stiffness of the oil film between the bottom surface of the hydrostatic slider and the bottom surface of the guide groove through the processor. The processor then determines whether the load-bearing capacity of the hydrostatic slider meets the standard under this predetermined pressure through the stiffness of the oil film. After that, the pressure of the oil film between the hydrostatic slider and the limiter can be changed multiple times through the pressure reducing valve, and multiple tests can be performed to determine whether the load-bearing capacity of the hydrostatic slider meets the standard. On the other hand, when the motion performance of the hydrostatic guide rail is to be tested, the pressure reducing valve is first adjusted to adjust the pressure of the pressure reducing valve to a predetermined pressure. Subsequently, the driving unit is started so that the driving unit drives the hydrostatic guide rail to move in the guide rail groove. When the speed of the hydrostatic guide rail reaches the speed to be tested, the detection component transmits the detected oil temperature in the hydrostatic slider and the flow rate information of the oil in the hydrostatic slider to the processor. The processor determines whether the motion performance of the hydrostatic slider under the current predetermined pressure meets the standard based on the information of the temperature and flow rate of the oil in the hydrostatic slider. Similarly, the pressure of the oil film between the hydrostatic slider and the limit part can be changed multiple times, and after multiple tests, it can be determined whether the motion performance of the hydrostatic slider meets the standard. Compared with the prior art, the hydrostatic guide rail performance testing device of the present application can not only test the load-bearing capacity of the hydrostatic guide rail, but also test the motion performance of the hydrostatic guide rail, so that the performance test of the hydrostatic guide rail is more comprehensive. In addition, in the present application, since downward pressure is applied to the hydrostatic slider by means of oil pressure, this means that during the movement of the hydrostatic slider, a load can also be applied to the hydrostatic slider at all times, thereby making the movement of the hydrostatic slider on the hydrostatic guide rail performance testing device closer to the actual working condition, so as to make the hydrostatic slider movement performance test more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] 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:

[0032] Figure 1 It is a structural schematic diagram of the static pressure guide rail performance testing device disclosed in this application;

[0033] Figure 2It is a partial structural schematic diagram of the static pressure guide rail performance testing device disclosed in this application (with the damping buffer removed);

[0034] Figure 3 for Figure 2 Enlarged schematic diagram of the middle I area;

[0035] Figure 4 for Figure 2 Enlarged schematic diagram of the middle II region;

[0036] Figure 5 It is a structural schematic diagram of the base and the hydrostatic guide rail disclosed in this application;

[0037] Figure 6 It is a structural schematic diagram of the limiting part disclosed in this application;

[0038] Figure 7 A logical schematic diagram of a performance testing method for a hydrostatic guide rail disclosed in the present application;

[0039] Figure 8 It is a schematic diagram of the relationship between the bearing force of the hydrostatic slider and the flow threshold value of the oil in the hydrostatic slider when the oil temperature in the hydrostatic slider disclosed in the present application is 20° C. and the speed of the hydrostatic slider is 100 m / min;

[0040] Fig. 9 It is a schematic diagram of the relationship between the bearing force of the hydrostatic slider and the flow threshold value of the oil in the hydrostatic slider when the oil temperature in the hydrostatic slider disclosed in the present application is 40° C. and the speed of the hydrostatic slider is 100 m / min;

[0041] Fig.10 It is a schematic diagram of the relationship between the bearing force of the hydrostatic slider and the pressure threshold of the hydrostatic oil when the temperature of the hydrostatic slider is 20°C and the speed of the hydrostatic slider is 100m / min;

[0042] Fig.11 It is a schematic diagram of the relationship between the bearing force of the hydrostatic slider and the pressure threshold of the hydrostatic oil when the temperature of the hydrostatic slider is 40°C and the speed of the hydrostatic slider is 100m / min;

[0043] Fig.12 This is a schematic diagram of the relationship between the load-bearing force and the oil film stiffness of the hydrostatic slider disclosed in this application.

[0044] The above drawings include the following reference numerals:

[0045] 10. Base; 11. Anchor bolt; 20. Hydrostatic guide rail; 21. Guide rail; 22. Hydrostatic slider; 23. Throttle; 30. Limiting part; 31. Cover plate; 32. Limiting block; 40. Pressure reducing valve; 50. Driving part; 61. First pressure sensor; 62. Second pressure sensor; 63. Flow sensor; 64. Temperature sensor; 70. Protective drag chain; 71. Roller; 72. Oil pipeline; 80. Damping buffer; 91. First gap; 92. Second gap; 211. Guide rail groove; 221. Sliding body; 311. Slide rail. DETAILED DESCRIPTION

[0046] 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.

[0047] 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.

[0048] 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.

[0049] See also Figures 1 to 6 As shown, according to an embodiment of the present application, a static pressure guide rail performance test device is provided, the static pressure guide rail 20 includes a guide rail 21 and a static pressure slider 22, and the static pressure guide rail performance test device includes a base 10, a limiter 30, an oil supply assembly (not shown in the figure), a pressure reducing valve 40, a drive unit 50, a detection assembly and a processor (not shown in the figure)

[0050] The base 10 is used to install two Figure 2The guide rails 21 are arranged at intervals along the length direction of the base 10 (such as the attached Figure 1 The guide rail 21 extends in the Y direction, and a guide rail groove 211 is provided between the two guide rails 21. The guide rail groove 211 extends along the length direction of the base 10, and the static pressure slider 22 is movably installed in the guide rail groove 211. The limiter 30 is provided at the top of the guide rail 21, and the oil supply assembly is connected with the static pressure slider 22, so that an oil film is generated between the static pressure slider 22 and the inner wall surface of the guide rail groove 211, and between the static pressure slider 22 and the limiter 30. The pressure reducing valve 40 is connected with the static pressure slider 22, and the pressure reducing valve 40 is used to adjust the pressure of the oil film between the limiter 30 and the static pressure slider 22. The driving unit 50 is connected with the static pressure slider 22, and the driving unit 50 is used to drive the static pressure slider 22 to slide in the guide rail groove 211. The detection assembly is arranged on the base 10, and the detection assembly is used at least to detect the bearing force of the hydrostatic slider 22, the thickness of the oil film, the temperature of the oil in the hydrostatic slider 22, the flow rate of the oil in the hydrostatic slider 22, and the moving speed of the hydrostatic slider 22. The processor is electrically connected to the detection assembly and the pressure reducing valve 40, respectively, and the processor is used at least to calculate the rigidity of the oil film, and use the rigidity of the oil film to judge the bearing capacity of the hydrostatic slider 22, and judge whether the motion performance of the hydrostatic slider 22 meets the standard through the temperature of the oil in the hydrostatic slider 22 and the flow rate of the oil in the hydrostatic slider 22.

[0051] Usually after the hydrostatic guide rail 20 is manufactured, the load-bearing performance and the movement performance of the hydrostatic guide rail 20 mainly depend on the load-bearing capacity and the movement performance of the hydrostatic slider 22, that is, the moving parts required on the hydrostatic guide rail 20 are usually installed on the hydrostatic slider 22. Therefore, testing the load-bearing capacity of the hydrostatic slider 22 and the movement performance of the hydrostatic slider 22 on the guide rail 21 can represent whether the performance of the hydrostatic guide rail 20 meets the standards.

[0052] When testing the performance of the hydrostatic guide rail 20, the hydrostatic slider 22 is first connected to the oil supply assembly. At this time, there is an oil film between the hydrostatic slider 22 and the guide rail groove 211, and between the hydrostatic slider 22 and the limiter 30. When testing the load-bearing capacity of the hydrostatic guide rail 20, first adjust the pressure reducing valve 40 to adjust the pressure of the oil film between the hydrostatic slider 22 and the limiter 30 to a predetermined pressure. Due to the influence of the interaction force, the oil film will exert an oil film on the hydrostatic slider 22 in the height direction (such as the adjacent Figure 1The detection component detects the predetermined pressure and the thickness of the oil film between the bottom surface of the static pressure slider 22 and the bottom surface of the guide groove 211, and then calculates the stiffness of the oil film between the bottom surface of the static pressure slider 22 and the bottom surface of the guide groove 211 through the processor. The processor then determines whether the load-bearing capacity of the static pressure slider 22 meets the standard under this predetermined pressure through the stiffness of the oil film. After that, the pressure of the oil film between the static pressure slider 22 and the limit part 30 can be changed multiple times through the pressure reducing valve 40, and multiple tests can be performed to determine whether the load-bearing capacity of the static pressure slider 22 meets the standard. On the other hand, when the motion performance of the static pressure guide rail 20 is to be tested, the pressure reducing valve 40 is first adjusted to adjust the pressure of the pressure reducing valve 40 to the predetermined pressure. Subsequently, the driving unit 50 is started so that the driving unit 50 drives the hydrostatic guide rail 20 to move in the guide rail groove 211. When the speed of the hydrostatic guide rail 20 reaches the speed to be tested, the detection component transmits the detected oil temperature in the hydrostatic slider 22 and the flow rate information of the oil in the hydrostatic slider 22 to the processor. The processor determines whether the movement performance of the hydrostatic slider 22 under the current predetermined pressure meets the standard based on the information of the temperature and flow rate of the oil in the hydrostatic slider 22. Similarly, the pressure of the oil film between the hydrostatic slider 22 and the limit portion 30 can be changed multiple times, and after multiple tests, it is determined whether the movement performance of the hydrostatic slider 22 meets the standard. Compared with the prior art, the hydrostatic guide rail performance testing device of this embodiment can not only test the load-bearing capacity of the hydrostatic guide rail 20, but also test the movement performance of the hydrostatic guide rail 20, so that the performance test of the hydrostatic guide rail 20 is more comprehensive. In addition, in this embodiment, since downward pressure is applied to the hydrostatic slider 22 by means of oil pressure, this means that during the movement of the hydrostatic slider 22, a load can be applied to the hydrostatic slider 22 at all times, so that the movement of the hydrostatic slider 22 on the hydrostatic guide rail performance testing device is closer to the actual working condition, so that the movement performance test of the hydrostatic slider 22 is more accurate.

[0053] Furthermore, the limiting portion 30 includes a cover plate 31 and a limiting block 32. The cover plate 31 is connected to the guide rail 21, and the cover plate 31 extends along the length direction of the base 10. The limiting block 32 is connected to a side of the cover plate 31 relative to the guide rail 21, and the limiting block 32 extends along the length direction of the base 10, and the limiting block 32 is located directly above the static pressure slider 22.

[0054] Specifically, when there is an oil film between the static pressure slider 22 and the limit block 32, the pressure reducing valve 40 increases the pressure applied by the oil film on the limit block 32 by adjusting the pressure of the oil film. According to the principle of interaction force, the pressure applied by the limit block 32 on the oil film also increases, thereby increasing the downward pressure applied by the oil film between the limit block 32 and the static pressure slider 22 on the static pressure slider 22. Compared with the prior art, the prior art is to use a booster block to push against the workbench so that the workbench applies downward pressure to the static pressure slider 22. One problem with this pressure application method is that, since the workbench is large and the booster block is small, this will cause the pressure on the workbench to be uneven when the booster block pushes against the workbench, thereby causing the downward pressure applied by the workbench to the static pressure slider 22 to be uneven. In this embodiment, the oil pressure is adjusted so that the oil pressure applies downward pressure to the static pressure slider 22. Since the oil pressure is uniform everywhere in the oil, the downward pressure applied by the oil to the static pressure slider 22 is also relatively uniform.

[0055] In addition, a plurality of static pressure cavities are arranged on the static pressure slider 22, and at least one static pressure cavity is arranged on the upper surface of the static pressure slider 22; wherein, along the height direction of the base 10, the projection surface of the static pressure cavity arranged on the upper surface of the static pressure slider 22 is located within the projection surface of the limit block 32.

[0056] In some embodiments, the static pressure slider 22 extends a predetermined length along the length direction of the base 10, and a static pressure cavity is provided on the outer peripheral surface of the static pressure slider 22 along the extension direction. The static pressure cavity is provided on the side wall of the static pressure slider 22, so that an oil film exists between the side wall of the static pressure slider 22 and the guide groove 211. The oil film is used to support the static pressure slider 22 and avoid direct contact between the side wall of the static pressure slider 22 and the inner wall of the guide groove 211; the static pressure cavity is provided on the lower surface of the static pressure slider 22, so that an oil film exists between the lower surface of the static pressure slider 22 and the bottom surface of the guide groove 211, so as to provide support for the static pressure slider 22. The static pressure cavity on the upper surface of the static pressure slider 22 allows an oil film to exist between the static pressure slider 22 and the limit block 32. By adjusting the pressure of the oil film, the oil film applies downward pressure to the static pressure slider 22, thereby facilitating the testing of the load-bearing capacity of the static pressure slider 22. In addition, in this embodiment, the projection surface of the static pressure cavity on the upper surface of the static pressure slider 22 is located within the projection surface of the stop block 32, that is, the stop block 32 can evenly apply pressure to the oil film in the static pressure cavity, so that the downward pressure applied by the oil film in the static pressure cavity to the static pressure slider 22 is relatively uniform, thereby avoiding the error in the performance test of the static pressure slider 22 caused by uneven downward pressure. It can be understood that the method of applying pressure to the static pressure slider 22 in the prior art is point pressure, while the method of applying pressure to the static pressure slider 22 in this embodiment is surface pressure, so when the static pressure slider 22 is tested using the structure of this embodiment, the error of the static pressure slider 22 due to uneven force can be smaller.

[0057] Furthermore, the limiting blocks 32 include models of various sizes, and the limiting blocks 32 of various models can be selectively and detachably connected to the cover plate 31 .

[0058] Specifically, when different static pressure sliders 22 are tested, different types of stoppers 32 can be selected and installed on the cover plate 31 to adapt to the size of the static pressure slider 22. For example, when the static pressure cavity on the upper surface of the static pressure slider 22 is large, a larger size of stopper 32 can be selected so that the projection surface of the static pressure cavity on the upper surface of the static pressure slider 22 in the height direction is completely located within the stopper 32.

[0059] Optionally, along the height direction of the base 10 , a first gap 91 is defined between the limit block 32 and the upper surface of the static pressure slider 22 , and the limit block 32 can move along the height direction of the base 10 to adjust the width A of the first gap 91 .

[0060] It is understandable that if the width of A is too small, it is difficult for the oil to enter the first gap 91 from the static pressure cavity on the upper surface of the static pressure slider 22, which ultimately results in the oil film being unable to exert downward pressure on the static pressure slider 22, resulting in failure of the test of the bearing capacity of the static pressure slider 22. If the first gap 91 is too large, the thickness of the oil film in the first gap 91 will be too wide, making it difficult to adjust the pressure of the oil film in the first gap 91. Therefore, in this embodiment, the width A of the first gap 91 can be adjusted by adjusting the limit block 32 to move in the height direction. In addition, when the static pressure slider 22 is selected to have a larger thickness, the limit block 32 can be moved to adjust the width A of the first gap 91, and the limit block 32 with a smaller thickness can also be installed on the cover plate 31. In a specific embodiment, the limit block 32 is connected to the cover plate 31 by an adjusting bolt, and the limit block 32 can be changed in the height direction by adjusting the adjusting bolt, thereby changing the width A of the first gap 91.

[0061] Furthermore, along the height direction of the base 10, the width A of the first gap 91 satisfies the relationship: 15μm≤A≤30μm. As mentioned above, if the width A of the first gap 91 is too narrow, there will be no oil film in the first gap 91; and if the width A of the first gap 91 is too large, it will be difficult to adjust the pressure of the oil in the static pressure chamber so that the oil film generates a large downward pressure on the static pressure slider 22. In this embodiment, the width A of the first gap 91 should be set between 15μm and 30μm, at which time the oil can enter the first gap 91, and the pressure of the oil can be adjusted to change the load applied by the oil to the static pressure slider 22. The value of A can be 15μm, 20μm, 25μm and 30μm. It is worth mentioning that in the present embodiment, there is a second gap 92 between the lower surface of the hydrostatic slider 22 and the bottom surface of the guide rail groove 211. When no load is applied to the hydrostatic slider 22, along the height direction of the base 10, the width B of the second gap 92 should be the same as the width A of the first gap 91.

[0062] Furthermore, the driving unit 50 includes a linear motor, a slide rail 311 of the linear motor is arranged on a side of the cover plate 31 relative to the guide rail groove 211, and the slide rail 311 extends along the length direction of the base 10, and a slide body 221 of the linear motor is slidably arranged on the slide rail 311, and the slide body 221 is fixedly connected to the static pressure slider 22 to drive the static pressure slider 22 to slide in the guide rail groove 211.

[0063] That is, the slide rail 311 is disposed on the lower surface of the cover plate 31, and the slide body 221 is fixedly connected to the upper surface of the static pressure slider 22. When the slide body 221 slides on the slide rail 311, the slide body 221 drives the static pressure slider 22 to move, so that the static pressure slider 22 can slide in the guide rail groove 211. In some embodiments, the detection component includes a speed sensor (not shown in the figure), which is disposed on the linear motor. The speed sensor reads the running speed of the linear motor and transmits the running speed to the processor.

[0064] In addition, the detection assembly also includes a first pressure sensor 61, a second pressure sensor 62, a laser displacement sensor (not shown in the figure), a flow sensor 63 and a temperature sensor 64. The first pressure sensor 61 is used to detect the pressure of the oil in the first gap 91, the second pressure sensor 62 is used to detect the pressure of the oil in the static pressure cavity on the lower surface of the static pressure slider 22, the laser displacement sensor is used to detect the thickness of the oil film between the lower surface of the static pressure slider 22 and the bottom surface of the guide groove 211, the flow sensor 63 is used to detect the change of the oil flow in the static pressure slider 22, and the temperature sensor 64 is used to detect the temperature of the oil in the static pressure slider 22. It can be understood that, since the area of ​​the static pressure cavity on the upper surface of the static pressure slider is known during the test, the first pressure sensor 62 measures the load of the oil in the static pressure cavity on the upper surface of the static pressure slider and sends the information to the processor, and the processor calculates the bearing capacity of the static pressure slider according to the load and the area of ​​the static pressure cavity.

[0065] Furthermore, the hydrostatic guide rail performance testing device further includes a position information component (not shown in the figure), which is disposed between the guide rail 21 and the hydrostatic slider 22, and is electrically connected to the processor.

[0066] In a specific embodiment, the position information component includes a reading head and a grating ruler, the grating ruler is arranged on the inner wall surface of the guide groove 211 and extends along the length direction of the guide groove 211, and the reading head is arranged on the static pressure slider 22, and the reading head is electrically connected to the processor. The reading head cooperates with the grating ruler to send the position information of the static pressure slider 22 in the guide groove 221 to the processor at all times, and the processor controls the linear motor to work according to the position information. For example, when the static pressure slider 22 moves to the end of the guide groove 211, the processor controls the linear motor to stop moving, thereby preventing the static pressure slider 22 from passing through the end of the guide groove 211 and escaping from the guide groove 211.

[0067] As attached Figure 5 As shown, the static pressure guide rail performance testing device further includes a damping buffer 80 , and the damping buffers 80 are disposed at both ends of the guide rail groove 211 in the extension direction.

[0068] Specifically, the damping buffer 80 is used to provide secondary insurance. When the static pressure guide rail 20 is tested for motion performance, if a power outage occurs or the position information component fails, the processor may be unable to control the linear motor according to the information of the position information component, causing the static pressure slider 22 to continue to move in the guide rail groove 211, which may eventually cause the static pressure slider 22 to fly out of the guide rail groove 211, which may cause harm to the tester in serious cases. Therefore, in this embodiment, damping buffers 80 are set at both ends of the extension direction of the guide rail groove 211. When a power outage or a position information component fails, the static pressure slider 22 hits the damping buffer 80, thereby stopping the static pressure slider 22 from moving.

[0069] In this embodiment, a plurality of anchor bolts 11 are provided at the bottom of the base 10. The flatness of the guide rail 21 is adjusted by adjusting the plurality of anchor bolts 11 to prevent the static pressure slider 22 from being installed obliquely in the guide rail groove 211, which results in errors in the performance test of the static pressure slider 22. In this embodiment, the static pressure slider 22 is connected to the pressure reducing valve 40 through the oil pipeline 72. When the static pressure guide rail 20 slides in the guide rail groove 211, the oil pipeline 72 also needs to move. In order to prevent the oil pipeline 72 from rubbing against other components of the static pressure guide rail performance test device, resulting in damage to the oil pipeline 72. Therefore, in this embodiment, a protective drag chain 70 is provided, and the protective drag chain 70 is arranged on the periphery of the oil pipeline 72, thereby preventing the oil pipeline 72 from rubbing against other components of the static pressure guide rail performance test device, resulting in wear and damage to the oil pipeline 72. Furthermore, in this embodiment, a roller 71 is also provided at the end of the guide rail groove 211, and the roller 71 is used to prevent the protection drag chain 70 from interfering with the guide rail 21 or the base 10 during the dynamic test of the static pressure slider 22, thereby preventing damage to the protection drag chain 70, the guide rail 21 or the base 10.

[0070] On the other hand, if the Figure 7 To Attachment Fig.12 As shown, the present application provides a performance test method for a hydrostatic guide rail 20, which is performed using the above-mentioned hydrostatic guide rail performance test device. The performance test method for the hydrostatic guide rail 20 includes: step S1: adjusting the pressure reducing valve 40 so that the bearing force P of the hydrostatic slider 22 is a first test value, starting the driving unit 50, and when it is detected that the movement speed V of the hydrostatic slider 22 reaches a first predetermined value, detecting the flow rate q of the oil in the hydrostatic slider 22 and the temperature T of the oil in the hydrostatic slider 22. Step S2: if the flow rate q of the oil in the hydrostatic slider 22 under the first test value is greater than or equal to the current temperature T and the flow rate threshold qi under the first test value, increase the first test value, and perform step S1 again until the first test value gradually increases to the second predetermined value. If the flow rate q of the oil in the hydrostatic slider 22 under the first test value in each test is greater than or equal to the current temperature T in the test and the flow rate threshold qi under the first test value, it is judged that the movement performance of the hydrostatic slider 22 meets the standard; otherwise, it is judged that the movement performance of the hydrostatic slider 22 does not meet the standard.

[0071] Specifically, when the dynamic performance test of the static pressure slider 22 is performed, the pressure reducing valve 40 and the first pressure sensor 61 are first used to cooperate so that the bearing force P applied by the oil film between the static pressure slider 22 and the limiter 30 to the static pressure slider 22 is adjusted to the first test value. Then, the linear motor is started, and the linear motor drives the static pressure slider 22 to accelerate in the guide groove 211. When the speed V of the static pressure slider 22 reaches the first predetermined value, the flow sensor 63 and the temperature sensor 64 transmit the detected flow rate q of the oil in the static pressure slider 22 and the temperature T of the oil to the processor. Then, the processor compares the flow rate q of the oil in the static pressure slider 22 at the current temperature T with the flow threshold qi at the first test value and the current temperature. If q is greater than or equal to qi, it means that the motion performance of the static pressure slider 22 meets the standard at the first test value. Subsequently, the first test value is increased and the test is performed again. If the first test value reaches the second predetermined value and the motion performance of the static pressure slider 22 meets the standard in each test, it means that the motion performance of the static pressure slider 22 meets the standard. Otherwise, it means that the motion performance of the static pressure slider 22 does not meet the standard.

[0072] It is understandable that when the bearing force on the hydrostatic slider 22 is greater and the movement speed of the hydrostatic slider 22 is greater, the consumption of the oil film between the hydrostatic slider 22 and the guide groove 211 is higher. In order to maintain the stability of the oil film, it is necessary to increase the flow rate of the oil in the hydrostatic slider 22. In some embodiments, the flow rate of the oil is usually controlled by the throttle 23. However, when the flow rate required by the hydrostatic slider 22 is too large and exceeds the adjustable range of the throttle 23, the flow rate of the oil in the hydrostatic slider 22 cannot be replenished in time, which may cause the oil film to rupture or reduce the stiffness of the oil film, thereby reducing the movement accuracy of the hydrostatic slider 22. In addition, the temperature of the oil in the hydrostatic slider 22 will have a certain impact on the stiffness and flow rate of the oil film. Therefore, this embodiment uses the flow rate and temperature of the oil in the hydrostatic slider 22 to simultaneously judge whether the movement performance of the hydrostatic slider 22 meets the standard. It is worth mentioning that when manufacturing the hydrostatic slider 22, the theoretical minimum flow rate of the hydrostatic slider 22 at a specific speed V, a specific load capacity P and a specific temperature T, i.e., the flow threshold value qi, can be obtained by theoretical calculation according to the parameters of the hydrostatic slider 22. Figure 8 and attached Fig. 9 As shown in FIG. 1 , the present application discloses a relationship diagram between the bearing force P of the hydrostatic slider 22 and the theoretical minimum flow rate qi of the oil in the hydrostatic slider 22 when the oil temperature in the hydrostatic slider 22 is 20°C and 40°C. That is to say, at the same temperature and when the bearing force applied to the hydrostatic slider 22 is the same, the flow rate of the oil in the hydrostatic slider 22 actually tested should be greater than or equal to the minimum flow rate qi obtained by theoretical calculation, and the motion performance of the hydrostatic slider 22 meets the standard under the pressure and temperature.

[0073] In a specific embodiment, the temperature of the oil in the hydrostatic slider 22 is maintained at 20° C. by a temperature controller, and the motion performance of the hydrostatic slider 22 is tested in the range of 0 N to 120,000 N when the load capacity of the hydrostatic slider 22 is 0 N. First, the first test value is set to 0 N, and then the first test value is increased by 20,000 N each time in each test. When the speed V of the hydrostatic slider 22 reaches 100 m / min, the flow rate q of the oil in the hydrostatic slider 22 in the current state is detected. If the load is 20,000 N, the flow rate q is greater than or equal to 90 ml / min, when the load is 40000N, the flow rate q is higher than or equal to 110ml / min, when the load is 60000N, the flow rate q is higher than or equal to 130ml / min, when the load is 80000N, the flow rate q is higher than or equal to 150ml / min, when the load is 100000N, the flow rate q is higher than or equal to 170ml / min, when the load is 120000N, the flow rate q is higher than or equal to 190ml / min, it means that the motion performance of the static pressure slider 22 meets the standard at this temperature. When the temperature of the oil in the hydrostatic slider 22 is 40°C, if the flow rate q is higher than or equal to 238ml / min when the load is 20000N, higher than or equal to 293ml / min when the load is 40000N, higher than or equal to 351ml / min when the load is 60000N, higher than or equal to 403ml / min when the load is 80000N, higher than or equal to 457ml / min when the load is 100000N, and higher than or equal to 518ml / min when the load is 120000N, it can be explained that the motion performance of the hydrostatic slider 22 meets the standard, otherwise it means that the motion performance of the hydrostatic slider 22 does not meet the standard. One advantage of the test method of this embodiment is that the actual stable working range of the hydrostatic slider 22 can be obtained through actual testing.

[0074] In addition, when the flow rate of the hydrostatic slider 22 is large, the oil pressure in the hydrostatic chamber on the bottom of the hydrostatic slider 22 increases, thereby increasing the rigidity of the oil film. If the flow rate of the oil in the hydrostatic slider 22 is large, and the rigidity of the oil film between the hydrostatic slider 22 and the bottom of the guide groove 211 is too low, the oil film may rupture, making it impossible for the hydrostatic slider 22 to work stably. Therefore, in this embodiment, a method for simultaneously using the hydrostatic chamber pressure to judge the motion stability of the hydrostatic slider 22 is also disclosed, that is, when executing step S1, when the speed V of the hydrostatic slider 22 reaches the first predetermined value, the oil pressure in the hydrostatic chamber is detected by the second pressure sensor 62. When executing step S2, the first test value is increased, and step S1 is executed again until the first test value gradually increases to the second predetermined value. If the flow rate q of the oil in the static pressure slider 22 under the first test value in each test is greater than or equal to the current temperature T in the test and the flow threshold qi under the first test value, and the pressure of the oil in the static pressure slider 22 under the first test value in each test is greater than or equal to the current temperature T in the test and the pressure threshold under the first test value, then it is judged that the movement performance of the static pressure slider 22 meets the standard; otherwise, it is judged that the movement performance of the static pressure slider 22 does not meet the standard.

[0075] Similarly, the pressure threshold can be obtained by theoretical calculation based on the parameters of the static pressure slider 22, as shown in the attached figure. Fig.10 and 11 The present application shows a schematic diagram of the relationship between the load-bearing capacity of the hydrostatic chamber and the pressure threshold of the oil in the hydrostatic chamber at 20°C and 40°C. In some specific embodiments, for example, when the speed of the hydrostatic slider 22 is 100m / min and the temperature of the oil in the hydrostatic slider 22 is 40°C, a hydrostatic slider with a maximum load of 120,000N is tested. If the load is 20,000N, the flow rate q is higher than or equal to 238ml / min and the pressure of the oil in the hydrostatic chamber is higher than or equal to 6.0mpa, when the load is 40,000N, the flow rate q is higher than or equal to 293ml / min and the pressure of the oil in the hydrostatic chamber is higher than 7.98mpa, and when the load is 60,000N, the flow rate q is higher than or equal to 351ml / min and the pressure of the oil in the hydrostatic chamber is higher than 6.0mpa. When the oil pressure is higher than 9.24 MPa, when the load is 80000N, the flow rate q is higher than or equal to 403 ml / min and the oil pressure in the static pressure chamber is higher than 10.33 MPa, when the load is 100000N, the flow rate q is higher than or equal to 457 ml / min and the oil pressure in the static pressure chamber is higher than 11.71 MPa, when the load is 120000N, the flow rate q is higher than or equal to 518 ml / min and the oil pressure in the static pressure chamber is higher than 12.74 MPa, it can be said that the motion performance of the static pressure slider 22 meets the standards, otherwise it means that the motion performance of the static pressure slider 22 does not meet the standards.

[0076] Furthermore, the performance test method of the hydrostatic guide rail 20 also includes: step S3: detecting the initial thickness H0 of the oil film, adjusting the pressure reducing valve 40 so that the bearing force P of the hydrostatic slider 22 is the second test value, detecting the thickness H1 of the oil film again, and calculating the stiffness K of the oil film under the second test value according to the second test value and the change value H0-H1 of the thickness of the oil film. Step S4: if the stiffness K of the oil film under the second test value is greater than or equal to the stiffness threshold Ki of the oil film under the second test value, increasing the second test value, and executing step S1 again until the second test value gradually increases to the third predetermined value, if the stiffness K of the oil film under the second test value in each test is greater than or equal to the stiffness threshold Ki of the oil film under the second test value in the test, then it is judged that the bearing capacity of the hydrostatic slider 22 meets the standard; otherwise, it is judged that the bearing capacity of the hydrostatic slider 22 does not meet the standard.

[0077] When the static test of the hydrostatic slider 22 is performed, that is, the load-bearing capacity of the hydrostatic slider 22 is tested, it is usually necessary to set the second test value first, that is, the load-bearing force P of the hydrostatic slider 22 is set at the first test value, and then the oil film stiffness K is calculated by the change of pressure and oil film thickness, that is, K = |P / (H0-H1)|, and at the same time, the minimum stiffness of the oil film under the current pressure can be obtained according to theoretical calculation, that is, the stiffness threshold Ki of the oil film at this time. If the actual oil film stiffness K is greater than or equal to the minimum oil film stiffness obtained by theoretical calculation, it means that under this pressure, the load-bearing capacity of the hydrostatic slider 22 meets the standard. After that, the first test value is increased and the test is performed again. If the test results meet the standard in each test when the first test value reaches the first predetermined value, it is judged that the load-bearing capacity of the hydrostatic slider 22 meets the standard. In some specific embodiments, for example, the initial first test value can be initially set to 10000N, and during the test, the first test value increases by 10000N each time until the first test value reaches the first predetermined value of 100000N. If the actual oil film stiffness K under each test is higher than or equal to the theoretical oil film stiffness under the pressure, it means that the static pressure slider 22 meets the standard under a load of 10000N to 100000N.

[0078] This application also provides Fig.12 The following specific embodiments are used to illustrate the load-bearing performance test of the static pressure slider 2222:

[0079] Embodiment 1:

[0080] The load-bearing capacity of the hydrostatic slider 22 is 20000N, and the oil film stiffness threshold Ki obtained by theoretical calculation is 1428N / μm.

[0081] Embodiment 2:

[0082] The load-bearing capacity of the hydrostatic slider 22 is 40000N, and the oil film stiffness threshold Ki obtained by theoretical calculation is 2676N / μm.

[0083] Embodiment 3:

[0084] The load-bearing capacity of the hydrostatic slider 22 is 60000N, and the oil film stiffness threshold Ki obtained by theoretical calculation is 3750N / μm.

[0085] Embodiment 4:

[0086] The load-bearing capacity of the hydrostatic slider 22 is 80000N, and the oil film stiffness threshold Ki obtained by theoretical calculation is 4705N / μm.

[0087] Embodiment 5:

[0088] The load-bearing capacity of the hydrostatic slider 22 is 100000N, and the oil film stiffness threshold Ki obtained by theoretical calculation is 5263N / μm.

[0089] Embodiment 6:

[0090] The bearing capacity of the hydrostatic slider 22 is 120000N, and the oil film stiffness threshold value obtained by theoretical calculation is 5500N / μm.

[0091] That is to say, as in Examples 1 to 5 and the attached Fig.12 From the relationship diagram between the bearing force P of the hydrostatic slider 22 and the oil film stiffness threshold Ki, it can be seen that when the maximum bearing design of the hydrostatic slider 22 is 120000N, if the hydrostatic slider 22 is tested within the maximum bearing capacity, when the loads applied to the hydrostatic slider 22 are 20000N, 40000N, 60000N, 80000N, 100000N and 120000N respectively, the stiffness of the oil film between the hydrostatic slider 22 and the bottom surface of the guide groove 211 can be higher than the oil film stiffness threshold Ki under the load, then it can be said that the bearing capacity of the hydrostatic slider 22 meets the standard.

[0092] In some test methods, the maximum working range of the hydrostatic slider 22, such as the maximum load of the hydrostatic slider 22 or the maximum stable speed of the hydrostatic slider 22, is usually calculated theoretically based on the structural structure of the hydrostatic slider 22, and then the flow rate and oil film stiffness of the oil in the hydrostatic slider 22 under the maximum working range are used to determine whether the performance of the hydrostatic slider 22 meets the standard. Different from the above test methods, the test method of this embodiment uses multi-point testing and gradually increases the test method to the maximum design working range, which can better detect the actual maximum working range of the hydrostatic slider 22 and thus improve the test accuracy.

[0093] In summary, the hydrostatic guide rail performance test device provided by the present application can not only test the load-bearing capacity of the hydrostatic slider 22, but also test the motion performance of the hydrostatic slider 22. Compared with the prior art, the test of the hydrostatic slider 22 is more comprehensive. In addition, the present application makes structural improvements so that the load applied to the hydrostatic slider 22 is provided by oil pressure, which simplifies the structural design on the one hand, and enables the hydrostatic slider 22 to always apply downward pressure to the hydrostatic slider 22 when it moves on the other hand, thereby improving the accuracy of the motion test performance of the hydrostatic slider 22. In addition, through the design of the limit block 32 and the hydrostatic cavity on the upper surface of the hydrostatic slider 22, the downward pressure applied by the oil film on the hydrostatic slider 22 is more uniform, thereby avoiding the overturning moment generated by the oil film and reducing the error generated by the performance test of the hydrostatic slider 22. The present application also provides a performance test method for a hydrostatic guide rail 20. The performance test method can detect the temperature working range of the hydrostatic guide rail 20 through multi-point testing on the one hand, and on the other hand, the accuracy of the test can be improved through multi-point testing.

[0094] 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.

[0095] 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.

[0096] 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 hydrostatic guide rail performance testing device, the hydrostatic guide rail (20) comprising a guide rail (21) and a hydrostatic slider (22), characterized in that: The static pressure guide rail performance testing device comprises: A base (10), the base (10) being used for installing two guide rails (21) arranged at intervals along the width direction of the base, the guide rails (21) extending along the length direction of the base (10), a guide rail groove (211) being arranged between the two guide rails (21), the guide rail groove (211) extending along the length direction of the base (10), and the static pressure slider (22) being movably installed in the guide rail groove (211); A limiting portion (30), wherein the limiting portion (30) is arranged on the top of the guide rail (21); An oil supply component, the oil supply component being in communication with the static pressure slider (22) so as to generate an oil film between the static pressure slider (22) and the inner wall surface of the guide rail groove (211), and between the static pressure slider (22) and the limiting portion (30); a pressure reducing valve (40), the pressure reducing valve (40) being in communication with the static pressure slider (22), the pressure reducing valve (40) being used to adjust the pressure of the oil film between the limiting portion (30) and the static pressure slider (22); A driving part (50), the driving part (50) being connected to the static pressure slider (22), and the driving part (50) being used to drive the static pressure slider (22) to slide in the guide rail groove (211); a detection component, the detection component being arranged on the base (10), the detection component being used at least to detect the pressure of the oil between the limit portion (30) and the static pressure slider (22), to detect the thickness of the oil film, to detect the temperature of the oil in the static pressure slider (22), to detect the flow rate of the oil in the static pressure slider (22), and to detect the moving speed of the static pressure slider (22); A processor, the processor is electrically connected to the detection component and the pressure reducing valve (40) respectively, and the processor is used to at least calculate the rigidity of the oil film, and use the rigidity of the oil film to determine the load-bearing capacity of the static pressure slider (22), and determine whether the movement performance of the static pressure slider (22) meets the standard through the temperature of the oil in the static pressure slider (22) and the flow rate of the oil in the static pressure slider (22).

2. The hydrostatic guide rail performance testing device according to claim 1, characterized in that: The limiting portion (30) comprises: A cover plate (31), the cover plate (31) being connected to the guide rail (21), and the cover plate (31) extending along the length direction of the base (10); A limit block (32), the limit block (32) being connected to a side of the cover plate (31) relative to the guide rail (21), the limit block (32) extending along the length direction of the base (10), and the limit block (32) being located directly above the static pressure slider (22).

3. The hydrostatic guide rail performance testing device according to claim 2, characterized in that: The static pressure slider (22) is provided with a plurality of static pressure cavities, and at least one static pressure cavity is provided on the upper surface of the static pressure slider (22); Wherein, along the height direction of the base (10), the projection surface of the static pressure cavity arranged on the upper surface of the static pressure sliding block (22) is located within the projection surface of the limit block (32).

4. The hydrostatic guide rail performance testing device according to claim 2, characterized in that: The limiting block (32) includes models of multiple different sizes, and the limiting blocks (32) of different models can be selectively and detachably connected to the cover plate (31); and / or, Along the height direction of the base (10), a first gap (91) is provided between the limit block (32) and the upper surface of the static pressure slider (22), and the limit block (32) can move along the height direction of the base (10) to adjust the width A of the first gap (91).

5. The hydrostatic guide rail performance testing device according to claim 2, characterized in that: Along the height direction of the base (10), a first gap (91) is provided between the limit block (32) and the upper surface of the static pressure sliding block (22); Wherein, along the height direction of the base (10), the width A of the first gap (91) satisfies the relationship: 15 μm≤A≤30 μm.

6. The hydrostatic guide rail performance testing device according to claim 2, characterized in that: The driving part (50) comprises a linear motor, a slide rail (311) of the linear motor is arranged on a side of the cover plate (31) relative to the guide rail groove (211), and the slide rail (311) extends along the length direction of the base (10), a slide body (221) of the linear motor is slidably arranged on the slide rail (311), and the slide body (221) is fixedly connected to the static pressure slider (22) to drive the static pressure slider (22) to slide in the guide rail groove (211).

7. The hydrostatic guide rail performance testing device according to any one of claims 1 to 6, characterized in that: The static pressure guide rail performance testing device further comprises a position information component, wherein the position information component is arranged between the guide rail (21) and the static pressure slider (22), and the position information component is electrically connected to the processor.

8. The hydrostatic guide rail performance testing device according to any one of claims 1 to 6, characterized in that: The static pressure guide rail performance testing device further comprises a damping buffer (80), and the damping buffer (80) is disposed at both ends of the guide rail groove (211) in the extension direction.

9. A method for testing the performance of a hydrostatic guide rail, characterized in that: The performance testing method of the hydrostatic guide rail is performed using a hydrostatic guide rail performance testing device according to any one of claims 1 to 8, and the performance testing method of the hydrostatic guide rail comprises: Step S1: adjusting the pressure reducing valve (40) so that the bearing force P of the static pressure slider (22) is a first test value, starting the driving unit (50), and when detecting that the movement speed V of the static pressure slider (22) reaches a first predetermined value, detecting the flow rate q of the oil in the static pressure slider (22) and the temperature T of the oil in the static pressure slider (22); Step S2: if the flow rate q of the oil in the static pressure slider (22) under the first test value is greater than or equal to the current temperature T and the flow rate threshold qi under the first test value, increase the first test value, and execute step S1 again until the first test value gradually increases to a second predetermined value. If the flow rate q of the oil in the static pressure slider (22) under the first test value in each test is greater than or equal to the current temperature T in the test and the flow rate threshold qi under the first test value, it is determined that the motion performance of the static pressure slider (22) meets the standard. Otherwise, it is determined that the movement performance of the static pressure slider (22) does not meet the standard.

10. The performance testing method of the hydrostatic guide rail according to claim 9, characterized in that: The performance testing method of the hydrostatic guide rail also includes: Step S3: detecting the initial thickness H0 of the oil film, adjusting the pressure reducing valve (40) so that the bearing force P on the static pressure slider (22) is a second test value, detecting the thickness H1 of the oil film again, and calculating the stiffness K of the oil film under the second test value based on the second test value and the change value H0-H1 of the thickness of the oil film; Step S4: If the stiffness K of the oil film at the second test value is greater than or equal to the oil film stiffness threshold Ki at the second test value, increase the second test value, and execute step S1 again until the second test value gradually increases to a third predetermined value. If the stiffness K of the oil film at the second test value in each test is greater than or equal to the oil film stiffness threshold Ki at the second test value in the test, it is judged that the load-bearing capacity of the static pressure slider (22) meets the standard; otherwise, it is judged that the load-bearing capacity of the static pressure slider (22) does not meet the standard.

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