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 hydrostatic guideway performance testing device comprises a base, a pressurizing assembly, a driving assembly, an oil supply assembly, a detection assembly and a processor. A guide rail groove is formed in the guide rail, the pressurizing assembly is arranged on the base and provided with a first position abutting against the static pressure sliding block to apply pressure to the static pressure sliding block and a second position separated from the static pressure sliding block, and the driving assembly is used for driving the static pressure sliding block to slide in the guide rail groove. The oil supply assembly communicates with the static pressure sliding block. The processor is electrically connected with the detection assembly, and 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 flow of 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 comprises a guide rail and a hydrostatic slider, and the hydrostatic guide rail performance test device comprises:

[0005] A base, 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 booster assembly, the booster assembly being disposed on the base, the booster assembly having a first position abutting against the static pressure slider to apply pressure to the static pressure slider, and a second position separated from the static pressure slider;

[0007] A driving assembly, the driving assembly is detachably connected to the static pressure slider, and the driving assembly is used to drive the static pressure slider to slide in the guide rail groove;

[0008] 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;

[0009] A detection component, the detection component is arranged on the base, and the detection component is at least used to detect the pressure applied by the booster component to the static pressure slider, detect the thickness of the oil film, detect the flow rate of the oil in the static pressure slider, and detect the moving speed of the static pressure slider;

[0010] A processor, the processor is electrically connected to the detection component, the processor is at least used to 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 flow rate of oil in the hydrostatic slider.

[0011] Furthermore, the static pressure guide rail performance testing device further comprises a support portion, and the support portion is arranged on the top of the guide rail;

[0012] When the oil supply assembly is in communication with the static pressure slider, the oil film is present between the upper surface of the static pressure slider and the support portion.

[0013] Further, the support portion includes a pressing plate, and the pressing plate extends along the length direction of the guide rail;

[0014] The driving assembly includes a first driving member and a mounting plate. The first driving member is movably disposed on the pressure plate. The mounting plate is detachably connected between the first driving member and the static pressure slider.

[0015] Furthermore, the booster assembly comprises:

[0016] A mounting frame, the mounting frame is arranged on the base, and the mounting frame has a mounting portion located above the guide rail;

[0017] a second driving member, the second driving member being mounted on the mounting portion;

[0018] A boosting part, wherein the boosting part is connected to the second driving member, and the second driving member drives the boosting part to reciprocate along the height direction of the mounting frame so that the boosting part switches between the first position and the second position.

[0019] Furthermore, the boosting part includes a boosting block, and the boosting assembly also includes an adjusting member, which is connected between the second driving member and the boosting block, and is used to make the boosting block fit with the upper surface of the static pressure slider.

[0020] Furthermore, a first limiting portion is provided on the inner wall surface of the guide rail groove opposite to and directly below the boost assembly, and a second limiting portion adapted to the first limiting portion is provided on the outer peripheral surface of the static pressure sliding block.

[0021] Furthermore, one of the first limiting portion and the second limiting portion is a magnetic main block, and the other is a magnetic auxiliary block adapted to the magnetic main block. The magnetic main block cooperates with the magnetic auxiliary block to limit the static pressure slider directly below the boost assembly.

[0022] Furthermore, the detection component comprises:

[0023] a first pressure sensor, the first pressure sensor being connected to the static pressure slider, and the first pressure sensor being used to detect the pressure applied by the boosting assembly to the static pressure slider;

[0024] A flow sensor, the flow sensor is connected to the static pressure slider, and the flow sensor is used to detect the flow of oil in the static pressure slider;

[0025] A laser displacement sensor, the laser displacement sensor is arranged between the guide rail groove and the static pressure slider, and the laser displacement sensor is at least used to detect the oil film thickness between the groove bottom surface of the guide rail groove and the bottom surface of the static pressure slider;

[0026] A speed sensor is arranged on the base to detect the movement speed of the static pressure slider.

[0027] 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 hydrostatic guide rail performance test device described above, and the performance test method for the hydrostatic guide rail includes:

[0028] Step S1: detecting the initial thickness H0 of the oil film, adjusting the pressure P applied by the booster assembly to the static pressure slider to a first test value, detecting the thickness H1 of the oil film again, and calculating the stiffness K of the oil film under the first test value according to the first test value and the change value H0-H1 of the thickness of the oil film;

[0029] Step S2: If the stiffness K of the oil film at the first test value is greater than or equal to the oil film stiffness threshold Ki at the first test value, increase the first test value, and execute step S1 again until the first test value gradually increases to a first predetermined value. If the stiffness K of the oil film at the first test value in each test is greater than or equal to the oil film stiffness threshold Ki at the first 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] Furthermore, the performance testing method of the hydrostatic guide rail also includes:

[0031] Step S3: moving the booster assembly to the second position, connecting the static pressure slider and the drive assembly, starting the drive assembly, and detecting the flow rate q of the oil in the static pressure slider when detecting that the movement speed V of the static pressure slider reaches a second test value;

[0032] Step S4: If the flow rate q of the oil in the hydrostatic slider under the second test value is greater than or equal to the flow threshold qi under the second test value, increase the second test value, and execute step S3 again until the second test value gradually increases to a second predetermined value. If the flow rate q of the oil in the hydrostatic slider under the second test value in each test is greater than or equal to the flow threshold qi under the second test value in the test, then it is judged that the movement performance of the hydrostatic slider meets the standard; otherwise, it is judged that the movement performance of the hydrostatic slider does not meet the standard.

[0033] Compared with the prior art, when the load-bearing capacity of the static pressure slider needs to be tested, the booster assembly is first moved to the first position so that the booster assembly directly presses against the static pressure slider. In the present application, the booster assembly presses against the upper surface of the static pressure slider, so that the stiffness of the oil film between the lower surface of the static pressure slider and the bottom surface of the guide groove changes. At this time, the pressure applied by the booster assembly to the static pressure slider and the thickness of the oil film are monitored by the detection assembly, so that the stiffness of the oil film can be calculated, and then the processor determines whether the load-bearing capacity of the static pressure slider meets the standard. When the motion performance of the static pressure slider needs to be tested, the booster assembly is first moved to the second position, and the drive assembly is connected to the static pressure slider, so that the drive assembly drives the static pressure slider to slide in the guide groove. After the static pressure slider slides, the flow rate of the liquid in the static pressure slider and the movement speed of the static pressure slider are detected, so that the processor determines whether the motion performance of the static pressure slider meets the standard. By testing the load-bearing capacity and motion performance of the static pressure slider, the performance of the static pressure guide rail can be more comprehensively judged. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] 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:

[0035] Figure 1 It is a partial structural schematic diagram of the hydrostatic guide rail performance testing device disclosed in the present application at a first viewing angle (with the oil supply assembly removed);

[0036] Figure 2 for Figure 1 Enlarged schematic diagram of the middle I area;

[0037] Figure 3 for Figure 1 Enlarged schematic diagram of the middle II area;

[0038] Figure 4 It is a partial structural schematic diagram of the hydrostatic guide rail performance testing device disclosed in the present application at a first viewing angle (with the oil supply assembly removed);

[0039] Figure 5 A logic diagram of a test method for a static pressure guide rail test device disclosed in the present application;

[0040] Figure 6 It is a schematic diagram of the relationship between the pressure P applied by the booster assembly disclosed in the present application to the static pressure slider and the oil film stiffness threshold Ki obtained by theoretical calculation;

[0041] Figure 7 It is a schematic diagram of the relationship between the movement speed V of the hydrostatic slider disclosed in the present application and the flow threshold value qi of the oil in the hydrostatic slider obtained by theoretical calculation;

[0042] Figure 8 It is a schematic diagram of the relationship between the movement speed V of the hydrostatic slider disclosed in the present application and the pressure threshold of the hydrostatic cavity on the lower surface of the hydrostatic slider obtained by theoretical calculation.

[0043] The above drawings include the following reference numerals:

[0044] 10. Base; 20. Hydrostatic guide rail; 21. Guide rail; 22. Hydrostatic slider; 23. Throttle; 30. Boosting assembly; 31. Mounting frame; 32. Second drive member; 33. Boosting unit; 34. Adjusting member; 40. Drive assembly; 41. First drive member; 42. Mounting plate; 51. First pressure sensor; 52. Second pressure sensor; 53. Flow sensor; 54. Speed ​​sensor; 60. Supporting unit; 61. Slide rail; 70. Stop block; 211. Guide rail groove; 212. First limiting unit; 221. Second limiting unit; 311. Mounting hole; 331. Boosting block; 601. Pressing plate; 2121. Magnetic main block; 2211. Magnetic auxiliary block. DETAILED DESCRIPTION

[0045] 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.

[0046] 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.

[0047] 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.

[0048] See also Figures 1 to 4 As shown, according to an embodiment of the present application, a hydrostatic guide rail performance testing device is provided, the hydrostatic guide rail 20 includes a guide rail 21 and a hydrostatic slider 22, and the hydrostatic guide rail performance testing device includes a base 10, a booster assembly 30, a drive assembly 40, an oil supply assembly, a detection assembly and a processor (not shown in the figure).

[0049] The base 10 is used to install two Figure 1 The guide rails 21 are arranged at intervals along the length direction of the base 10 (such as the attached Figure 4 The two guide rails 21 extend 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 booster assembly 30 is arranged on the base 10, and the booster assembly 30 has a first position that abuts against the static pressure slider 22 to apply pressure to the static pressure slider 22, and a second position separated from the static pressure slider 22. The driving assembly 40 is detachably connected to the static pressure slider 22, and the driving assembly 40 is used to drive the static pressure slider 22 to slide in the guide rail groove 211. The oil supply assembly is connected to 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. The detection assembly is arranged on the base 10, and the detection assembly is at least used to detect the pressure applied by the booster assembly 30 to the static pressure slider 22, the thickness of the oil film, the flow rate of the oil in the static pressure slider 22, and the moving speed of the static pressure slider 22. The processor is electrically connected to the detection component, 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 22, and determine whether the movement performance of the hydrostatic slider 22 meets the standard through the flow rate of oil in the hydrostatic slider 22.

[0050] 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.

[0051] Specifically, the static pressure slider 22 extends a predetermined length along the length direction of the guide rail 21, and a static pressure cavity is provided on the outer peripheral side of the static pressure slider 22. When the static pressure slider 22 is connected to the oil supply assembly, an oil film is formed between the static pressure slider 22 and the inner wall surface of the guide rail groove 211, so that the static pressure slider 22 can slide freely in the guide rail groove 211; at the same time, a throttle 23 is provided on the static pressure slider 22, and the throttle 23 is used to adjust the stiffness of the oil film between the static pressure slider 22 and the guide rail groove 211. When the load-bearing capacity of the static pressure slider 22 needs to be tested, the booster assembly 30 is first moved to the first position so that the booster assembly 30 directly abuts against the static pressure slider 22. In this embodiment, the booster assembly 30 abuts against the upper surface of the static pressure slider 22, so that the stiffness of the oil film between the lower surface of the static pressure slider 22 and the bottom surface of the guide rail groove 211 changes. At this time, the pressure applied by the booster assembly 30 to the hydrostatic slider 22 and the thickness of the oil film are monitored by the detection assembly, so that the stiffness of the oil film can be calculated, and then the processor can determine whether the load-bearing capacity of the hydrostatic slider 22 meets the standard. When the motion performance of the hydrostatic slider 22 needs to be tested, the booster assembly 30 is first moved to the second position, and the drive assembly 40 is connected to the hydrostatic slider 22, so that the drive assembly 40 drives the hydrostatic slider 22 to slide in the guide groove 211. After the hydrostatic slider 22 slides, the flow rate of the liquid in the hydrostatic slider 22 and the movement speed of the hydrostatic slider 22 are detected, so that the processor can determine whether the motion performance of the hydrostatic slider 22 meets the standard. By performing load-bearing capacity test and motion performance test on the hydrostatic slider 22, the performance of the hydrostatic guide rail 20 can be more comprehensively judged.

[0052] Compared with the prior art, the hydrostatic slider 22 of the present application can slide in the guide rail groove 211 under the drive of the driving assembly 40, so that the motion performance of the hydrostatic slider 22 can be judged by the processor and the detection assembly. In the prior art, since a workbench is provided on the hydrostatic guide rail 20, the workbench makes the volume of the hydrostatic guide rail performance test device too large, and since the span of the workbench is large, the force applied by the workbench to the hydrostatic slider 22 is easily tilted, which ultimately causes errors in the performance test of the hydrostatic slider 22. In addition, the detection assembly on the existing hydrostatic guide rail performance test device cannot detect the motion speed of the hydrostatic slider 22, so it is impossible to obtain the motion performance of the hydrostatic slider 22 at a specific speed. On the other hand, the booster assembly 30 in the existing hydrostatic guide rail 20 testing device needs to apply pressure to the workbench, while the booster assembly 30 in the hydrostatic guide rail 20 testing device provided in the present application directly presses against the hydrostatic slider 22, which facilitates the adjustment of the verticality of the booster assembly 30 and the hydrostatic slider 22, thereby avoiding the tilt between the booster assembly 30 and the hydrostatic slider 22, resulting in an overturning moment of the hydrostatic slider 22, affecting the performance test of the hydrostatic slider 22.

[0053] Furthermore, the hydrostatic guide rail performance testing device also includes a support portion 60 , which is disposed on the top of the guide rail 21 ; when the oil supply assembly is connected to the hydrostatic slider 22 , an oil film is formed between the hydrostatic slider 22 and the support portion 60 .

[0054] That is, when the hydrostatic slider 22 is disposed in the guide groove 211 and is connected to the oil supply assembly, an oil film is formed between the outer peripheral side surface of the hydrostatic slider 22 and the inner wall surface of the guide groove 211, respectively. The oil film between the bottom surface of the hydrostatic slider 22 and the bottom surface of the guide groove 211 is used to bear the load, and the oil film between the hydrostatic slider 22 and the side wall of the guide groove 211 provides support for the hydrostatic slider 22 to avoid direct contact between the hydrostatic slider 22 and the guide groove 211. In addition, when there is an oil film between the hydrostatic slider 22 and the support portion 60, if the hydrostatic slider 22 tilts in the guide groove 211, the oil film between the support plate and the hydrostatic slider 22 is squeezed, so that the support portion 60 applies a reaction force to the oil film, thereby balancing the overturning moment of the hydrostatic guide 20.

[0055] In addition, the support part 60 includes a pressure plate 601, which extends along the length direction of the guide rail 21; the drive assembly 40 includes a first drive member 41 and a mounting plate 42, the first drive member 41 is movably arranged on the pressure plate 601, and the mounting plate 42 is detachably connected between the first drive member 41 and the static pressure slider 22.

[0056] Specifically, when the motion performance of the static pressure slider 22 needs to be tested, the booster assembly 30 is first moved to the second position, and then the mounting plate 42 is connected between the first driving member 41 and the static pressure slider 22. Then, the first driving member 41 is started, and the first driving member 41 moves on the pressure plate 601, thereby driving the static pressure slider 22 to move in the guide rail groove 211. In this embodiment, the first driving member 41 is a linear motor, and the slide rail 61 of the linear motor is arranged on the top of the pressure plate 601, and the slide body of the linear motor is slidably arranged on the slide rail 61.

[0057] Furthermore, the boosting assembly 30 includes a mounting frame 31, a second driving member 32 and a boosting portion 33. The mounting frame 31 is arranged on the base 10, the mounting frame 31 has a mounting portion located above the guide rail 21, the second driving member 32 is mounted on the mounting portion, the boosting portion 33 is connected to the second driving member 32, and the second driving member 32 drives the boosting portion 33 to move along the height direction of the mounting frame 31 (such as the attached Figure 1 The booster 33 reciprocates in the Z direction to switch between the first position and the second position.

[0058] In this embodiment, the mounting frame 31 includes a gantry, which is fixed on opposite sides of the base 10. A plurality of mounting holes 311 are provided at the connection between the gantry and the base 10, and the plurality of mounting holes 311 are used to adjust the mounting position of the gantry. Specifically, when the gantry is mounted on the base 10, one side of the gantry is first fixed on the base 10, and then when the other side of the gantry is mounted, the mounting holes 311 are continuously adjusted with a tool or a measuring tool during the installation, and the installation flatness of the gantry is adjusted so that the booster 33 can be close to the upper surface of the static pressure slider 22 in the second position, thereby preventing the direction of the force applied by the booster 33 to the static pressure slider 22 from being inclined to the height direction, causing the oil film of the static pressure slider 22 to generate an overturning moment. In this embodiment, the second driving member 32 adopts a cylinder, which is arranged on the gantry and located at the top of the guide rail 21. The booster part 33 is connected to the output shaft of the cylinder. The cylinder can enable the booster part 33 to apply a predetermined load to the static pressure slider 22.

[0059] Furthermore, the boosting part 33 includes a boosting block 331 , and the boosting assembly 30 also includes an adjusting member 34 , which is connected between the second driving member 32 and the boosting block 331 , and is used to make the boosting block 331 fit the upper surface of the static pressure slider 22 .

[0060] Specifically, the adjusting member 34 is a ball bearing, a groove is formed on the booster block 331, the ball bearing is arranged in the groove, the booster block 331 is connected to the ball bearing through a rotating shaft, and the ball bearing is fixedly connected to the output shaft of the oil cylinder. In actual installation, it is necessary to ensure that the booster block 331 is arranged parallel to the upper surface of the static pressure slider 22 relative to the upper surface of the static pressure slider 22, so that the force applied by the booster block 331 to the static pressure slider 22 is perpendicular to the upper surface of the static pressure slider 22, thereby avoiding the oil film between the static pressure slider 22 and the inner wall of the guide groove 211 from generating an overturning moment. If the surface of the boost block 331 is not parallel to the upper surface of the static pressure slider 22, since a ball bearing is provided in this embodiment, when the boost block 331 contacts the upper surface of the static pressure slider 22, the boost block 331 rotates under the action of the ball bearing, so that the surface of the boost block 331 fits with the upper surface of the static pressure slider 22, and thus when the boost block 331 applies a load to the static pressure slider 22, the static pressure slider 22 will not deviate.

[0061] In addition, a first limiting portion 212 is provided on the inner wall surface of the guide rail groove 211 opposite to the supercharging assembly 30 , and a second limiting portion 221 adapted to the first limiting portion 212 is provided on the outer peripheral surface of the static pressure sliding block 22 .

[0062] In this embodiment, in order to improve the efficiency of testing the load-bearing performance of the static pressure slider 22, a first limiting portion 212 is provided on the inner wall surface of the guide groove 211, and a second limiting portion 221 is provided on the outer peripheral surface of the static pressure slider 22. The first limiting portion 212 and the second limiting portion 221 cooperate to lock the static pressure slider 22 directly below the booster assembly 30, so that the booster assembly 30 can apply pressure to the static pressure slider 22. In addition, in each test, due to the provision of the first limiting portion 212 and the second limiting portion 221, the position where the booster block 331 resists the static pressure slider 22 in each test is almost the same, thereby reducing the error caused by the booster block 331 resisting at different positions of the static pressure slider 22 during the test.

[0063] Furthermore, one of the first limiting portion 212 and the second limiting portion 221 is a magnetic main block 2121, and the other is a magnetic auxiliary block 2211 adapted to the magnetic main block 2121. The magnetic main block 2121 cooperates with the magnetic auxiliary block 2211 to limit the static pressure slider 22 directly below the boost assembly 30.

[0064] Specifically, the magnetic main block 2121 is embedded in the guide rail 21 and is located on the inner wall of the guide rail groove 211. The magnetic auxiliary block 2211 is set on the top of the static pressure guide rail 20. When the static pressure slider 22 moves to the bottom of the boost assembly 30, the magnetic auxiliary block 2211 is attracted by the magnetic main block 2121, thereby fixing the static pressure slider 22 to the bottom of the boost assembly 30.

[0065] In this embodiment, the detection assembly includes a first pressure sensor 51, a flow sensor 53, a laser displacement sensor (not shown in the figure) and a speed sensor 54. The first pressure sensor 51 is connected to the static pressure slider 22, and the first pressure sensor 51 is used to detect the pressure applied by the boost assembly 30 to the static pressure slider 22. The flow sensor 53 is connected to the static pressure slider 22, and the flow sensor 53 is used to detect the flow of oil in the static pressure slider 22. The laser displacement sensor is arranged between the guide groove 211 and the static pressure slider 22, and the laser displacement sensor is at least used to detect the thickness of the oil film between the bottom surface of the guide groove 211 and the bottom surface of the static pressure slider 22. The speed sensor 54 is arranged on the base 10 to detect the movement speed of the static pressure slider 22.

[0066] Specifically, the first pressure sensor 51 transmits the detected pressure applied by the booster assembly 30 to the static pressure slider 22 to the processor through an electrical signal, and the laser displacement sensor transmits the oil film thickness between the bottom surface of the guide groove 211 and the bottom surface of the static pressure slider 22 to the processor through an electrical signal. The processor calculates the oil film stiffness at this time based on the oil film thickness and the pressure applied by the booster assembly 30 to the static pressure slider 22. If the oil film stiffness is too low at this time, the processor determines that the load-bearing capacity of the static pressure slider 22 does not meet the standard. In addition, after the speed sensor 54 detects the speed of the static pressure slider 22, it transmits the speed to the processor; at the same time, the flow sensor 53 transmits the detected flow to the processor. At this time, the processor determines whether the motion performance of the static pressure slider 22 meets the standard based on the speed and the flow of the static pressure slider 22. For example, when the static pressure slider 22 moves at a predetermined speed, if the flow of the static pressure slider 22 is too low at this time, it means that the motion performance of the static pressure slider 22 does not meet the standard.

[0067] On the other hand, the linear motor is connected to the hydrostatic slider 22 via the mounting plate 42, and the speed of the linear motor is consistent with that of the hydrostatic slider 22. Usually, the linear motor is connected to the processor and transmits the speed of the linear motor to the processor. However, there may be a certain error between the actual speed of the linear motor and the speed transmitted to the processor by the linear motor. In order to avoid the error affecting the accuracy of the test, a speed sensor 54 is additionally provided in this embodiment. The speed sensor 54 is used to detect the speed of the linear motor, that is, to detect the speed of the hydrostatic slider 22. In this embodiment, the speed sensor 54 can be a pull-wire displacement sensor or a laser displacement sensor, that is, the displacement amount and displacement time of the linear motor are used to obtain the speed of the linear motor.

[0068] In addition, the detection component also includes a second pressure sensor 52, which is connected to the static pressure cavity on the bottom surface of the static pressure slider 22 to detect the pressure of the static pressure cavity. In some motion tests of the static pressure slider 22, when the static pressure slider 22 reaches a certain speed, the pressure of the static pressure cavity on the bottom surface of the static pressure slider 22 needs to be higher than a specific value, and the flow rate of the static pressure slider 22 also needs to be higher than a specific flow rate. Only then can it be determined that the motion test of the static pressure slider 22 meets the standard. On the other hand, since the flow rate is also related to the temperature of the oil, the detection component also includes a temperature sensor, which is used to detect the temperature of the oil in the static pressure slider 22, and then it can be determined whether the motion performance of the static pressure slider 22 meets the standard by the speed of the static pressure slider 22, the temperature of the oil in the static pressure slider 22, the flow rate of the oil in the static pressure slider 22, and the pressure of the static pressure cavity.

[0069] In some embodiments, stop blocks 70 are disposed at the ends of both ends of the guide rail groove 211 , and the stop blocks 70 are used to stop the static pressure slider 22 , thereby preventing the static pressure slider 22 from sliding out of the guide rail groove 211 .

[0070] On the other hand, if the Figure 5 To Attachment Figure 8 As shown, the present application provides a performance test method for a hydrostatic guide rail, which is performed using the above-mentioned hydrostatic guide rail performance test device, and the performance test method for the hydrostatic guide rail includes: step S1: detecting the initial thickness H0 of the oil film, adjusting the pressure P applied by the booster assembly 30 to the hydrostatic slider 22 to a first test value, detecting the thickness H1 of the oil film again, and calculating the stiffness K of the oil film under the first test value according to the first test value and the change value H0-H1 of the thickness of the oil film. Step S2: if the stiffness K of the oil film under the first test value is greater than or equal to the stiffness threshold Ki of the oil film under the first test value, increase the first test value, and perform step S1 again until the first test value gradually increases to a first predetermined value, if the stiffness K of the oil film under the first test value in each test is greater than or equal to the stiffness threshold Ki of the oil film under the first test value in the test, then it is judged that the load-bearing capacity of the hydrostatic slider 22 meets the standard; otherwise, it is judged that the load-bearing capacity of the hydrostatic slider 22 does not meet the standard.

[0071] When the static test of the static pressure slider 22 is performed, that is, the load-bearing capacity of the static pressure slider 22 is tested, it is usually necessary to set the first test value first, that is, the pressure applied by the booster assembly 30 to the static pressure 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 static pressure slider 22 meets the standard. Afterwards, 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 static pressure 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.

[0072] In addition, the maximum theoretical load of the hydrostatic slider 22 under the design and the minimum oil film stiffness under the maximum theoretical load can also be calculated first. Then, the first test value is set as the maximum theoretical load of the hydrostatic slider 22, the thickness change of the oil film H0-H1 is detected, and the actual oil film stiffness K is calculated. If the oil film stiffness at this time is higher than the minimum oil film stiffness under the maximum theoretical load, it can be judged that the load-bearing capacity of the hydrostatic slider 22 meets the standard. It can be understood that due to the processing technology of the hydrostatic slider 22 or the influence of environmental factors, the actual maximum load of the hydrostatic slider 22 may be different from the maximum theoretical load. Therefore, when the maximum theoretical load is directly applied to the hydrostatic slider 22, the hydrostatic slider 22 may be damaged. The method of gradually increasing the size of the first test value and testing multiple times adopted in this embodiment can gradually explore the actual maximum load range of the hydrostatic slider 22.

[0073] Furthermore, the performance test method of the hydrostatic guide rail also includes: step S3: moving the booster assembly 30 to the second position, connecting the hydrostatic slider 22 and the drive assembly 40, starting the drive assembly 40, and when it is detected that the movement speed V of the hydrostatic slider 22 reaches the second test value, detecting the flow rate q of the oil in the hydrostatic slider 22. Step S4: if the flow rate q of the oil in the hydrostatic slider 22 under the second test value is greater than or equal to the flow rate threshold qi under the second test value, increase the second test value, and execute step S3 again until the second test value gradually increases to the second predetermined value, and the flow rate q of the oil in the hydrostatic slider 22 under the second test value in each test is greater than or equal to the flow rate threshold qi under the second test value in the test, then 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.

[0074] Compared with the prior art, the present embodiment can also test the dynamic performance of the hydrostatic slider 22. It is understandable that when the movement speed of the hydrostatic slider 22 is faster, the consumption of the oil between the hydrostatic slider 22 and the guide groove 211 is higher, and the amount of oil required to be provided to the hydrostatic chamber is higher. The throttle 23 on the hydrostatic slider 22 is used to adjust the flow rate of the oil in the hydrostatic chamber. When the amount of oil required by the hydrostatic chamber is too large, it exceeds the adjustable range of the throttle 23, which will cause the oil film between the hydrostatic slider 22 and the guide groove 211 to be unstable, and finally cause errors in the movement accuracy of the hydrostatic slider 22. Therefore, in the present embodiment, the flow rate q in the hydrostatic slider 22 is measured to determine whether the movement performance of the hydrostatic slider 22 meets the standard. Similar to measuring static performance, that is, measuring the load-bearing capacity of the hydrostatic slider 22, first start the drive assembly 40 to move the hydrostatic slider 22 in the guide groove 211. When the movement speed V of the hydrostatic slider 22 reaches the speed to be measured, the flow rate q detected in the hydrostatic slider 22 is compared with the theoretically calculated minimum flow rate qi. If the actual flow rate q is greater than the theoretically calculated minimum flow rate qi, it means that the oil film between the hydrostatic slider 22 and the guide groove 211 is relatively stable at this speed. After that, gradually increase the test speed. When the test speed reaches the second predetermined value, and the actual flow rate in each test is less than the theoretical minimum flow rate qi at this speed, it means that the movement performance of the hydrostatic slider 22 meets the standard. Similarly, the method of gradually increasing the test speed of the hydrostatic slider in this embodiment facilitates the detection of the actual maximum stable speed of the hydrostatic slider.

[0075] This application also provides Figure 6 To Attachment Figure 8 , and the following specific embodiments are used to illustrate the load-bearing performance test of the static pressure slider 22 and the motion performance test of the static pressure slider 22:

[0076] Embodiment 1:

[0077] The load applied by the boost assembly 30 to the static pressure slider 22 is 20000N, and the oil film stiffness threshold Ki obtained by theoretical calculation is 1428N / μm.

[0078] Embodiment 2:

[0079] The load applied by the boost assembly 30 to the static pressure slider 22 is 40000N, and the oil film stiffness threshold Ki obtained by theoretical calculation is 2676N / μm.

[0080] Embodiment 3:

[0081] The load applied by the boost assembly 30 to the static pressure slider 22 is 60000N, and the oil film stiffness threshold Ki obtained by theoretical calculation is 3750N / μm.

[0082] Embodiment 4:

[0083] The load applied by the boost assembly 30 to the static pressure slider 22 is 80000N, and the oil film stiffness threshold Ki obtained by theoretical calculation is 4705N / μm.

[0084] Embodiment 5:

[0085] The load applied by the boost assembly 30 to the static pressure slider 22 is 100000N, and the oil film stiffness threshold Ki obtained by theoretical calculation is 5263N / μm.

[0086] Embodiment 6:

[0087] The load applied by the boost assembly 30 to the static pressure slider 22 is 120000N, and the oil film stiffness threshold value obtained by theoretical calculation is 5500N / μm.

[0088] That is to say, as in Examples 1 to 5 and the attached Figure 6 From the relationship diagram of the actual pressure P of the booster component 30 on the hydrostatic slider 22 and the oil film stiffness threshold Ki, it can be seen that when the maximum load-bearing design of the hydrostatic slider 22 is 120000N, if the hydrostatic slider 22 is tested within the maximum load-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 load-bearing capacity of the hydrostatic slider 22 meets the standard.

[0089] Embodiment 7:

[0090] The movement speed V of the slider is 40m / min. At this time, the flow threshold qi obtained by theoretical calculation is 130ml / min. At this time, the pressure threshold of the static pressure cavity on the bottom surface of the static pressure slider 22 obtained by theoretical calculation is 6.3mpa.

[0091] Embodiment 8:

[0092] The movement speed V of the slider is 60m / min. At this time, the flow threshold qi obtained by theoretical calculation is 150ml / min. At this time, the pressure threshold of the static pressure cavity on the bottom surface of the static pressure slider 22 obtained by theoretical calculation is 6.43mpa.

[0093] Embodiment 9:

[0094] The movement speed V of the slider is 80 m / min. At this time, the flow threshold value qi obtained by theoretical calculation is 170 ml / min. At this time, the pressure threshold value of the static pressure cavity on the bottom surface of the static pressure slider 22 obtained by theoretical calculation is 6.56 MPa.

[0095] Embodiment 10:

[0096] The movement speed V of the slider is 100 m / min. At this time, the flow threshold value qi obtained by theoretical calculation is 190 ml / min. At this time, the pressure threshold value of the static pressure cavity on the bottom surface of the static pressure slider 22 obtained by theoretical calculation is 6.69 MPa.

[0097] In some embodiments, the stable movement speed V of the hydrostatic slider 22 is usually set at 100 m / min. During the test, the flow rate q of the oil in the hydrostatic slider 22 can be tested when V is 40 m / min, 60 m / min, 80 m / min and 100 m / min respectively. If the flow rate of the oil in the hydrostatic slider 22 is higher than the theoretically calculated qi in each test, it means that the movement performance of the hydrostatic slider 22 meets the standard; that is, when the hydrostatic slider 22 moves at a certain speed V, the flow rate q of the oil in the hydrostatic slider 22 should be higher than the theoretically calculated qi. Figure 7 On the other hand, it is understandable that when the flow rate of the oil in the hydrostatic slider 22 increases, the oil pressure between the hydrostatic slider 22 and the bottom surface of the guide groove 211 will also increase. Therefore, in order to improve the accuracy of judging whether the motion performance of the hydrostatic guide rail 20 meets the standard, as shown in the attached figure, Figure 8 As shown, this embodiment also provides a theoretical pressure threshold of the static pressure chamber on the bottom surface of the static pressure slider 22, that is, the flow rate q and the pressure of the static pressure chamber can be used to simultaneously determine whether the movement performance of the static pressure slider 22 meets the standard.

[0098] In summary, the hydrostatic guide performance test device of the present application is provided with a drive assembly 40, which is detachably connected to the hydrostatic slider 22, so that the hydrostatic slider 22 can slide in the guide groove 211, thereby facilitating the testing of the motion performance of the hydrostatic slider 22; at the same time, the hydrostatic guide performance test device of the present application can also apply a load to the hydrostatic slider 22 through the booster assembly 30, calculate the stiffness of the oil film between the hydrostatic slider 22 and the guide groove 211, and then test the load-bearing capacity of the hydrostatic slider 22, so that the test of the hydrostatic guide 20 is more comprehensive. In addition, in the hydrostatic guide performance test device of the present application, a ball head bearing is provided between the booster block 331 and the oil cylinder, so that when the hydrostatic slider 22 is tilted, the booster block 331 can always fit on the upper surface of the hydrostatic slider 22. On the other hand, the support portion 60 of the present application has an oil film between the hydrostatic slider 22 and the support portion 60, so that when the hydrostatic slider 22 generates an overturning moment, the oil film between the support plate and the hydrostatic slider 22 can offset the overturning moment on the hydrostatic slider 22 under the interaction force, thereby keeping the hydrostatic slider 22 parallel to the ground of the guide groove 211. Finally, the present application also provides a test method for a hydrostatic guide performance test device to determine whether the load-bearing capacity of the hydrostatic slider 22 and the motion performance of the hydrostatic slider 22 meet the standards.

[0099] 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.

[0100] 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.

[0101] 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 hydrostatic guide performance test device includes: A base (10), the base (10) being used to install two guide rails (21) spaced apart 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 provided 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 booster assembly (30), the booster assembly (30) being disposed on the base (10), the booster assembly (30) having a first position abutting against the static pressure slider (22) to apply pressure to the static pressure slider (22), and a second position separated from the static pressure slider (22); A driving assembly (40), wherein the driving assembly (40) is detachably connected to the static pressure slider (22), and the driving assembly (40) is used to drive the static pressure slider (22) to slide in the guide rail groove (211); 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); a detection component, the detection component being arranged on the base (10), the detection component being used at least to detect the pressure applied by the booster component (30) to the static pressure slider (22), to detect the thickness of the oil film, 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, 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 (22), and determine whether the movement performance of the hydrostatic slider (22) meets the standard through the flow rate of oil in the hydrostatic slider (22).

2. The hydrostatic guide rail performance testing device according to claim 1, characterized in that: The static pressure guide rail performance testing device further comprises a support portion (60), wherein the support portion (60) is arranged on the top of the guide rail (21); When the oil supply assembly is in communication with the static pressure slider (22), the oil film is present between the upper surface of the static pressure slider (22) and the support portion (60).

3. The hydrostatic guide rail performance testing device according to claim 2, characterized in that: The support portion (60) comprises a pressing plate (601), and the pressing plate (601) extends along the length direction of the guide rail (21); The driving assembly (40) comprises a first driving member (41) and a mounting plate (42), wherein the first driving member (41) is movably arranged on the pressure plate (601), and the mounting plate (42) is detachably connected between the first driving member (41) and the static pressure slider (22).

4. The hydrostatic guide rail performance testing device according to claim 1, characterized in that: The booster assembly (30) comprises: A mounting frame (31), the mounting frame (31) being arranged on the base (10), the mounting frame (31) having a mounting portion located above the guide rail (21); a second driving member (32), the second driving member (32) being mounted on the mounting portion; A booster part (33), the booster part (33) is connected to the second driving member (32), and the second driving member (32) drives the booster part (33) to reciprocate along the height direction of the mounting frame (31), so that the booster part (33) switches between the first position and the second position.

5. The hydrostatic guide rail performance testing device according to claim 4, characterized in that: The boosting part (33) comprises a boosting block (331), and the boosting assembly (30) further comprises an adjusting member (34), wherein the adjusting member (34) is connected between the second driving member (32) and the boosting block (331), and the adjusting member (34) is used to make the boosting block (331) fit with the upper surface of the static pressure slider (22).

6. The hydrostatic guide rail performance testing device according to any one of claims 1 to 5, characterized in that: A first limiting portion (212) is provided on the inner wall surface of the guide rail groove (211) opposite to the booster assembly (30) directly below, and a second limiting portion (221) adapted to the first limiting portion (212) is provided on the outer peripheral surface of the static pressure sliding block (22).

7. The hydrostatic guide rail performance testing device according to claim 6, characterized in that: One of the first limiting portion (212) and the second limiting portion (221) is a magnetic main block (2121), and the other is a magnetic auxiliary block (2211) adapted to the magnetic main block (2121), and the magnetic main block (2121) cooperates with the magnetic auxiliary block (2211) to limit the static pressure slider (22) to be directly below the boost assembly (30).

8. The hydrostatic guide rail performance testing device according to any one of claims 1 to 5, characterized in that: The detection component comprises: a first pressure sensor (51), the first pressure sensor (51) being connected to the static pressure slider (22), the first pressure sensor (51) being used to detect the pressure applied by the boosting component (30) to the static pressure slider (22); A flow sensor (53), the flow sensor (53) being in communication with the static pressure slider (22), the flow sensor (53) being used to detect the flow of oil in the static pressure slider (22); a laser displacement sensor, the laser displacement sensor being arranged between the guide rail groove (211) and the static pressure slider (22), the laser displacement sensor being used at least to detect the thickness of an oil film between the bottom surface of the guide rail groove (211) and the bottom surface of the static pressure slider (22); A speed sensor (54) is arranged on the base (10) to detect the movement speed of the static pressure slider (22).

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: detecting the initial thickness H0 of the oil film, adjusting the pressure P applied by the booster assembly (30) to the static pressure slider (22) to a first test value, detecting the thickness H1 of the oil film again, and calculating the stiffness K of the oil film under the first test value based on the first test value and the change value H0-H1 of the thickness of the oil film; Step S2: If the stiffness K of the oil film at the first test value is greater than or equal to the oil film stiffness threshold Ki at the first test value, increase the first test value, and execute step S1 again until the first test value gradually increases to a first predetermined value. If the stiffness K of the oil film at the first test value in each test is greater than or equal to the oil film stiffness threshold Ki at the first 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.

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: moving the booster assembly (30) to the second position, connecting the static pressure slider (22) and the drive assembly (40), starting the drive assembly (40), and detecting the flow rate q of the oil in the static pressure slider (22) when detecting that the movement speed V of the static pressure slider (22) reaches a second test value; Step S4: If the flow rate q of the oil in the hydrostatic slider (22) under the second test value is greater than or equal to the flow rate threshold qi under the second test value, increase the second test value, and execute step S3 again until the second test value gradually increases to a second predetermined value. In each test, the flow rate q of the oil in the hydrostatic slider (22) under the second test value is greater than or equal to the flow rate threshold qi under the second test value in the test, then 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.

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