Multifunctional test bed for horizontal rolling linear guide rail pair

Abstract

The invention discloses a multifunctional test bed for a horizontal rolling linear guide rail pair. The multifunctional test bed comprises a lower bed body, an upper bed body, a test assembly, a loading assembly and a dragging assembly, the lower lathe bed is composed of a base, a main guide rail and leveling ground feet, the upper lathe bed is composed of a moving plate, an auxiliary guide rail and a test assembly mounting table, the loading assembly is composed of a gantry, a hydraulic cylinder and a force sensor, the test assembly is composed of a tested guide rail pair, an adapter plate, a measuring frame, various sensors and a loading block, and the dragging assembly is composed of a lead screw guide rail pair and a servo motor. Various tests of comprehensive performance measurement, reliability, fatigue life and static rigidity of the rolling guide rail pair can be carried out on one device, two guide rail pairs can be tested at the same time, the performance and efficiency of the guide rail pair test bed are improved, and meanwhile the horizontal type mode facilitates installation of the tested guide rail pair.

Description

Technical Field

[0001] The invention belongs to the technical field of rolling linear guide performance testing, in particular to a horizontal rolling linear guide pair multifunctional test bench. Background Art

[0002] The rolling linear guide pair is a rolling support mechanism with unique mechanical properties that was developed in the late 1970s and gradually improved based on the basic principle of rolling bearings. It is composed of mechanical components such as linear guides, rolling elements (balls or balls), sliders, etc. It plays the role of bearing and guiding the movement of moving parts in mechanical transmission. It has the characteristics of simple structure, small dynamic and static friction coefficient, high positioning accuracy, good precision retention, etc. It has become one of the key basic components of precision CNC equipment. Since the commercialization of linear guide pairs in 1973, they have been widely used in industries such as precision machinery, automation, various power transmissions, semiconductors, medical and aerospace.

[0003] As an important supporting and guiding mechanism in the machinery industry, its performance indicators have also attracted much attention, including comprehensive performance parameters, including operating accuracy, preload drag, vibration, noise, acceleration, temperature rise, etc., functional reliability, accuracy retention, fatigue life and rated dynamic load, as well as static stiffness and rated static load, etc. The detection and testing of these parameters are crucial for product selection, verification and upgrading.

[0004] Therefore, it is very important to develop a test bench that can perform high-precision measurements on these key performance indicators in order to provide actual data basis for product development and product improvement. At present, there are few studies on multifunctional test benches for rolling linear guides in China. Due to technical confidentiality reasons, research data on rolling linear guides abroad are rarely disclosed. Most of the test benches for related performance of rolling linear guides in China only test one of the performances, such as invention patents CN102620 934A and CN102330116A. Each test bench can only detect and test one performance in a targeted manner. The high test efficiency, high cost and long cycle have become technical problems that technicians in this field urgently need to solve. Therefore, we have developed a horizontal multifunctional test bench that can detect and test multiple performances of rolling linear guides on a test bench, and can test two tested guide pairs at a time. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a horizontal rolling linear guide pair multifunctional test bench, which can detect and test multiple performances of rolling linear guide pairs on one test bench and can test two tested guide pairs at a time, and can give priority to solving the problems of low efficiency, high cost and long cycle of current rolling linear guide pair performance tests.

[0006] In order to achieve the above-mentioned purpose, the present invention provides a horizontal rolling linear guide multifunctional test bench, including a lower bed, an upper bed, a test assembly, a loading assembly, and a drag assembly; the drag assembly is installed on the upper surface of the lower bed, and the upper bed is installed on the lower bed through the drag assembly. The test assembly is provided in two groups, and the two groups of the test assemblies are symmetrically installed on the two side surfaces of the upper bed. The loading assembly spans the lower bed and is fixedly connected to both sides of the lower bed. The loading assembly is connected to the slider of the test assembly through an S-type tension and pressure sensor.

[0007] Furthermore, the lower bed includes a contact switch block, a base, an anti-collision device, a main rail wedge clamping block, a main rail pair, a leveling foot, and a main rail mounting guard; the main rail pair has two sets, which are used for bearing and guiding when the upper bed moves, and the two sets of the main rail pairs are arranged along the length direction of the base, and the contact switch block is provided with two pieces, and the two contact switch blocks are located on the side of one set of the main rail pairs; the main rail mounting guard and the main rail wedge clamping block are respectively arranged on both sides of the main rail pair, and the two main rail pairs adopt an installation method in which one side is positioned and the other side is fixed, the main rail mounting guard is used for positioning the main rail pair during installation, and the main rail wedge clamping block is used for fixing the main rail pair during installation; the leveling foot is installed under the base, and the leveling foot is used to adjust the overall level of the lower bed, and the anti-collision devices are distributed in pairs at one end of the base to play a role of mechanical protection, and the positions of the two anti-collision devices correspond to the positions of the two main rail pairs.

[0008] Furthermore, the upper bed includes a contact switch, a moving plate, a secondary guide wedge clamping block, a secondary guide mounting grid, a secondary guide pair, a secondary guide slider mounting grid, a test assembly mounting grid, a mounting table, a motion accuracy measurement reference surface, a secondary guide slider fixing screw mounting surface, a main guide slider mounting grid, and a main guide slider fixing screw mounting surface; two sets of secondary guide pairs are installed on the moving plate, the installation direction of the secondary guide pairs is perpendicular to the length direction of the lower bed, and secondary guide wedge clamping blocks and secondary guide mounting grids are respectively arranged on both sides of the secondary guide pairs, a mounting table is arranged above the moving plate, the mounting table is installed on the secondary guide pair, and a secondary guide slider mounting plate is arranged at a position corresponding to the secondary guide pair below the mounting table. The backing grid and the auxiliary guide rail slider fixing screw mounting surface, the auxiliary guide rail slider mounting backing grid and the auxiliary guide rail slider fixing screw mounting surface are respectively located on both sides of the slider of the auxiliary guide rail pair, the slider of the main guide pair is connected to the moving plate, and the main guide slider fixing screw mounting surface and the main guide slider mounting backing grid are arranged under the moving plate, the main guide slider fixing screw mounting surface and the main guide slider mounting backing grid are located on both sides of the slider of the main guide pair, the mounting table is used for the installation of the test component, during installation, the test component mounting backing grid is used for positioning the test component, and then the two are fixedly connected, the motion accuracy measurement reference surface is installed on the upper part of the mounting table, and the motion accuracy measurement reference surface is used to cooperate with the motion accuracy measurement of the test component.

[0009] Furthermore, the test assembly includes a mounting grid for the guide rail pair to be tested, an adapter plate, a guide rail pair to be tested, an S-type tension and pressure sensor, an S-type tension and pressure sensor mounting bracket, a contact displacement sensor, a temperature sensor, a loading block, a triaxial vibration sensor, a measuring frame, and a contact displacement sensor bracket; the guide rail pair to be tested is mounted on the adapter plate, a mounting grid for the guide rail pair to be tested is installed on one side of the guide rail pair to be tested, the mounting grid for the guide rail pair to be tested is used for positioning the guide rail pair to be tested during installation, and the S-type tension and pressure sensor is positioned by the S-type tension and pressure sensor mounting bracket The frame is installed on the measuring frame, the measuring frame is fixedly installed on the loading block, the loading block is installed on the upper surface of the slider of the measured guide rail pair, the temperature sensor is pasted on the side of the slider of the measured guide rail pair, the three-axis vibration sensor is magnetically attracted to the measuring frame, at least one contact displacement sensor is vertically installed on the measuring frame, the parallel measuring frame is installed on the rear side of the slider of the measured guide rail pair, one of the contact displacement sensors is installed on the parallel measuring frame, and the front end of the contact displacement sensor installed on the parallel measuring frame is against the side of the slider of the measured guide rail pair.

[0010] Furthermore, the loading assembly includes a gantry side plate, a hydraulic cylinder, a gantry upper plate, a force sensor adapter block, a spoke-type force sensor, a loading front end, a preload force measuring arm, and a baffle; the gantry side plates are provided with two pieces, and the two gantry side plates are located on both sides of the length direction of the lower bed, and the inner sides of the gantry side plates are installed with a force sensor adapter block, a spoke-type force sensor, a loading front end, and a preload force measuring arm, the spoke-type force sensor is installed on the force sensor adapter block, and the loading front end is installed on the force-bearing surface of the spoke-type force sensor. The preload drag force measuring arm is installed on the inner side of the loading front end, a hydraulic cylinder is installed on one of the gantry side panels, and the force sensor adapter block on the inner side of the gantry side panel with the hydraulic cylinder is connected to the piston rod of the hydraulic cylinder. A baffle is installed on the other gantry side panel, and the force sensor adapter block on the inner side of the gantry side panel with the baffle is connected to the front end of the baffle. The gantry upper plate is installed above the two gantry side panels, and the two preload drag force measuring arms are connected to the S-type tension and pressure sensors to assist in the measurement of the preload drag force.

[0011] Furthermore, the dragging assembly includes a bearing seat, a screw, an upper bed connecting block, a screw nut, an integrated box, and a servo motor; the bearing seat is provided with a bearing, the integrated box is installed at one end of the lower bed, the servo motor is installed at one end of the integrated box, the screw nut is installed on the screw, the upper bed connecting block is installed on the screw nut, the bearing seat is installed on the screw, the bearing seat is installed on the lower bed, and the main shaft of the servo motor and the screw are connected together through the integrated box.

[0012] The technical effects achieved by the present invention are as follows:

[0013] 1. This test bench can carry out multifunctional performance test, reliability test, fatigue life test and static stiffness test on the same equipment, which can meet the comprehensive measurement of all parameters of rolling linear guide pair;

[0014] 2. The test bench uses a hydraulic system for loading, with accurate and controllable loading force, simple structure and high power-to-weight ratio;

[0015] 3. The loading system of this test bench adopts a hydraulic system on one end and a mechanical stop column unit on the opposite side, which can ensure that the loading force of the guide rails on both sides is completely equal;

[0016] 4. A secondary guide rail and a clamp are set under the test assembly of this test bench in the rotating state, which can solve the problem of lateral bending caused by unequal loading forces on both sides due to errors, ensuring the strength of the structure and the accuracy of measurement;

[0017] 5. This test bench uses three contact displacement sensors in the running accuracy measurement, taking into account the distortion measurement of the measured guide rail, and the calculation of the running accuracy is accurate and reliable;

[0018] 6. This test bench can realize the test and measurement of different types of rolling linear guide pairs by replacing the measuring frame and the adapter plate, achieving full coverage of rolling linear guide pairs on the market. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of a horizontal rolling linear guide multifunctional test bench of the present invention;

[0020] Figure 2 It is a structural schematic diagram of a lower bed of a horizontal rolling linear guide multifunctional test bench of the present invention;

[0021] Figure 3 It is a structural schematic diagram of an upper bed of a horizontal rolling linear guide multifunctional test bench of the present invention;

[0022] Figure 4 It is a structural schematic diagram of a test assembly of a horizontal rolling linear guide multifunctional test bench of the present invention;

[0023] Figure 5 It is a structural schematic diagram of a loading assembly of a horizontal rolling linear guide multifunctional test bench of the present invention;

[0024] Figure 6 The present invention is a schematic structural diagram of a drag component of a horizontal rolling linear guide multifunctional test bench.

[0025] Markings in the figure: 1. Lower bed; 2. Upper bed; 3. Test assembly; 4. Loading assembly; 5. Drag assembly; 11. Contact switch block; 12. Base; 13. Anti-collision device; 14. Main guide wedge clamping block; 15. Main guide pair; 16. Widening plate; 17. Leveling foot; 18. Main guide installation fence; 21. Contact switch; 22. Moving plate; 23. Auxiliary guide wedge clamping block; 24. Auxiliary guide installation fence; 25. Auxiliary guide pair; 26. Clamp; 27. Auxiliary guide slider installation fence; 28. Test assembly installation fence; 29. ​​Mounting table; 210. Motion accuracy measurement reference surface; 211. Auxiliary guide slider fixing screw installation surface; 212. Main guide slider installation fence; 213. Main guide slider 31. Mounting surface of the block fixing screw; 31. Mounting grid of the measured guide rail pair; 32. Adapter plate; 33. Measured guide rail pair; 34. S-type tension and pressure sensor; 35. Mounting bracket of S-type tension and pressure sensor; 36. Contact displacement sensor; 37. Temperature sensor; 38. Loading block; 39. Three-axis vibration sensor; 310. Measuring frame; 311. Contact displacement sensor bracket; 41. Gantry side plate; 42. Hydraulic cylinder; 43. Gantry upper plate; 44. Force sensor adapter block; 45. Spoke force sensor; 46. Loading front end; 47. Preload drag force measuring arm; 48. Baffle plate; 51. Bearing seat; 52. Screw; 53. Upper bed connecting block; 54. Screw nut; 55. Integrated box; 56. Servo motor. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] like Figure 1 As shown, the present invention provides a horizontal high-efficiency rolling linear guide multifunctional test bench, comprising a lower bed 1, an upper bed 2, a test assembly 3, a loading assembly 4, and a drag assembly 5; wherein the lower bed 1 is made of granite, the drag assembly 5 is mounted on the upper surface of the base 1, the upper bed 2 is mounted on the lower bed 1 through the drag assembly 5, and two groups of test assemblies 3 are symmetrically mounted on the two sides of the upper bed 2. The loading assembly 4 spans the lower bed 1 and is fixedly connected to both sides of the lower bed 1, and is connected to the slider of the test assembly 3 through an S-shaped tension and pressure sensor 34.

[0028] like Figure 2As shown, the lower bed 1 includes a contact switch block 11, a base 12, an anti-collision device 13, a main rail wedge clamping block 14, a main rail pair 15, a widening plate 16, a leveling foot 17, and a main rail installation fence 18. There are two sets of main rail pairs 15, which are used for bearing and guiding when the upper bed 2 moves. The two sets of main rail pairs 15 are arranged along the length direction of the base 12. There are two contact switch blocks 11, which are located on the side of one set of main rail pairs 15, and are used to cooperate with the contact switch 21 to play an electrical protection role. The main rail installation fence 18 and the main rail wedge clamping block 14 are respectively arranged on both sides of the main rail pair 15. Both main rail pairs 15 adopt an installation method of positioning on one side and fixing on the other side. The main rail installation fence 18 is used for positioning the main rail pair 15 when it is installed, and the main rail wedge clamping block 14 is used for fixing the main rail pair 15 when it is installed, so as to reduce the serpentine bending of the main rail pair 15.

[0029] The leveling foot 17 is used to adjust the overall level of the lower bed 1. The base 12 is used as the base of the lower bed 1 to install the relevant components of the test bench. The bumper 13 is distributed in pairs at one end of the base 12. The position of the bumper 13 corresponds to the position of the main rail pair 15, which plays a role in mechanical protection.

[0030] There are two widening plates 16, which are used to adjust the distance between the gantry and install the gantry.

[0031] like Figure 3 As shown, the upper bed 2 includes a contact switch 21, a moving plate 22, a secondary guide wedge clamping block 23, a secondary guide mounting fence 24, a secondary guide pair 25, a clamp 26, a secondary guide slider mounting fence 27, a test assembly mounting fence 28, a mounting table 29, a motion accuracy measurement reference surface 210, a secondary guide slider fixing screw mounting surface 211, a main guide slider mounting fence 212, and a main guide slider fixing screw mounting surface 213. Two contact switches 21 are installed at the lower part of the moving plate 22, and the two contact switches 21 are used to cooperate with the contact switch block 11 for electrical protection. The moving plate 22 is used for the installation of the mounting table 29, and the moving plate 22 is fixedly connected to the upper bed connection block 53 of the drag assembly 5, thereby driving the reciprocating motion of the mounting table 29.

[0032] Two sets of auxiliary guide rail pairs 25 are installed on the moving plate 22. The installation direction of the auxiliary guide rail pairs 25 is perpendicular to the length direction of the lower bed 1. The auxiliary guide rail wedge clamping blocks 23 and the auxiliary guide rail installation fence 24 are respectively arranged on both sides of the auxiliary guide rail pairs 25. The auxiliary guide rail wedge clamping blocks 23 and the auxiliary guide rail installation fence 24 are used to position and clamp the auxiliary guide rail pairs 25. The auxiliary guide rail installation fence 24 is used to position the auxiliary guide rail pairs 25, and the auxiliary guide rail wedge clamping blocks 23 are used to clamp and fix the auxiliary guide rail pairs 25.

[0033] A secondary guide rail slider mounting grid 27 and a secondary guide rail slider fixing screw mounting surface 211 are provided at a position corresponding to the secondary guide rail pair 25 below the mounting platform 29. The secondary guide rail slider mounting grid 27 and the secondary guide rail slider fixing screw mounting surface 211 are respectively located on both sides of the slider of the secondary guide rail pair 25. The two sliders of the secondary guide rail pair 25 are in a form in which one side is fixed and the other side is not fixed. The secondary guide rail slider mounting grid 27 and the secondary guide rail slider fixing screw mounting surface 211 are respectively used for positioning and clamping the slider of the secondary guide rail pair 25. The slider of the main rail pair 15 is fixedly connected to the moving plate 22. The two sliders of the main rail pair 15 are also in a form in which one side is fixed and the other side is not fixed. The main rail slider fixing screw mounting surface 213 is used for fixing the slider of the main rail pair 15. The main rail slider mounting grid 212 is used for positioning the slider of the main rail pair 15 during installation. The mounting table 29 is used for mounting the test assembly 3. During the mounting, the test assembly mounting grid 28 is used for positioning the test assembly 3, and then the two are fixedly connected. The motion accuracy measurement reference surface 210 is used for cooperating with the motion accuracy measurement of the test assembly 3. The clamp 26 is used for lateral fixation of the motion table 22.

[0034] like Figure 4 As shown, the test assembly 3 includes a mounting grid 31 for the tested guide rail pair, an adapter plate 32, a tested guide rail pair 33, an S-type tension and pressure sensor 34, an S-type tension and pressure sensor mounting bracket 35, a contact displacement sensor 36, a temperature sensor 37, a loading block 38, a triaxial vibration sensor 39, a measuring frame 310, and a contact displacement sensor bracket 311. The tested guide rail pair 33 is mounted on the adapter plate 32, the tested guide rail pair mounting grid 31 is used for positioning the tested guide rail pair 33 during installation, the S-type tension and pressure sensor 34 is mounted on the measuring frame 310 through the S-type tension and pressure sensor mounting bracket 35, the temperature sensor 37 is attached to the side of the tested guide rail pair 33 near the commutator, and the triaxial vibration sensor 39 is magnetically attracted to the measuring frame 36. There are three contact displacement sensors 36, two of which are vertically mounted on the measuring frame 310, and two contact displacement sensors 36 are symmetrically mounted on both sides of the center of the upper surface of the slider of the measured guide pair 33, and the front ends of the two contact displacement sensors 36 are against the motion accuracy measurement reference surface 210. The parallel measuring frame 311 is mounted on the rear side of the slider of the measured guide pair 33, and the third contact displacement sensor 36 is mounted on the parallel measuring frame 311, and the front end of the third contact displacement sensor 36 is against the side of the slider of the measured guide pair 33. The measuring frame 310 is fixedly connected to the loading block 38, and the loading block 38 is mounted on the upper surface of the slider of the measured guide pair 33, in order to make the loading force more evenly distributed on the upper surface of the slider of the measuring guide pair 33.

[0035] like Figure 5As shown, the loading assembly 4 includes a gantry side plate 41 , a hydraulic cylinder 42 , a gantry upper plate 43 , a force sensor adapter block 44 , a spoke-type force sensor 45 , a loading front end 46 , a preload drag force measuring arm 47 , and a baffle 48 .

[0036] Two gantry side plates 41 are provided. The two gantry side plates 41 are located on both sides of the lower bed 1 in the length direction, and the right gantry side plate is fixedly connected to the widening plate 16 .

[0037] The inner side of the gantry side plate 41 is installed with a force sensor adapter block 44, a spoke force sensor 45, a loading front end 46, and a preload force measuring arm 47. The spoke force sensor 45 is installed on the force sensor adapter block 44, the loading front end 46 is installed on the force bearing surface of the spoke force sensor 45, and the preload force measuring arm 47 is installed on the inner side of the loading front end 46. The hydraulic cylinder 42 is installed on the left gantry side plate 41. The left side is the loading unit, in which the spoke force sensor 45 is connected to the piston rod of the hydraulic cylinder 43 through the force sensor adapter block 44. The right side is the stop column unit, which does not have a hydraulic cylinder, but is replaced by a stop plate 48, so the force sensor adapter block 44 is connected to the front end of the stop plate 48. The gantry upper plate 43 is installed on the two gantry side plates 41. The preload drag force measuring arm 47 is connected to the S-type tension and pressure sensor 34 to assist in the measurement of the preload drag force. Movable grooves are respectively provided on both sides of the preload drag force measuring arm 47. The horizontal grooves ensure that it can be fixed to various types of guide rails to be measured, and the vertical grooves can absorb processing errors, thereby solving the problem of being unable to be flush with the measured slider.

[0038] like Figure 6 As shown, the drag assembly 5 includes a bearing seat 51, a lead screw 52, ​​an upper bed connection block 53, a lead screw nut 54, an integrated box 55, and a servo motor 56. The bearing seat 51 is provided with a bearing, the integrated box 55 is installed at one end of the lower bed 1, the servo motor 56 is installed at one end of the integrated box 56, the lead screw nut 54 is installed on the lead screw 52, ​​the upper bed connection block 53 is installed on the lead screw nut 54, the bearing seat 51 is installed on the lead screw 52, ​​the bearing seat 51 is installed on the lower bed 1, and the main shaft of the servo motor 56 and the lead screw 52 are connected together through the integrated box 55. The integrated box 55 integrates the lead screw bearing and the coupling.

[0039] The test bench measures the comprehensive performance index of the rolling linear guide pair in the following way: the measurement process does not require the application of load, the hydraulic cylinder 42 retracts, and the mounting table 29 is moved laterally, so that the loading block 38 of the test component 3 is separated from the loading front ends 46 on both sides. After finding a suitable position, the clamp 26 is clamped to fix the mounting table 29 laterally; the drag component 5 drags the upper bed 2 to drive the guide rail of the guide pair 33 to be tested to reciprocate at a given speed and acceleration; the S-type tension and pressure sensor 34 outputs the friction force of the guide pair 33 under uniform speed conditions, that is, the pre-tightening drag force; the temperature sensor 37 outputs the temperature rise of the guide pair 33 to be tested as it continuously reciprocates; the three-axis vibration sensor 39 outputs the vibration signals of the guide pair 33 to be tested in two directions and the acceleration signals in the direction of movement; the data measured by the contact displacement sensor 36 can calculate the distortion of the guide pair 33 to be tested during the movement and the parallelism in two directions.

[0040] The test bench uses the following method to test the accuracy retention of rolling linear guide pairs: the hydraulic cylinder 42 in the loading assembly 4 applies corresponding pressure to the two sets of guide pairs 33 to be tested, and the other side is used as a mechanical stop column to make the loading forces on both sides equal. The dragging assembly 5 drags the upper bed 2 to drive the guide rails of the guide pairs 33 to be tested to reciprocate at a given speed and acceleration. According to the prescribed test cycle, the contact displacement sensor 38 and the S-type tension and pressure sensor 34 are used to measure the operating accuracy and preload drag force, and the data is recorded until the accuracy does not meet the requirements and the test ends.

[0041] The test method of this test bench for the functional reliability of rolling linear guide pairs is as follows: the hydraulic cylinder 42 in the loading component 4 applies corresponding pressure to the two sets of guide pairs 33 under test, and the other side is used as a mechanical stop column to make the loading forces on both sides equal. The dragging component 5 drags the upper bed 2 to drive the guide rails of the guide pairs 33 under test to reciprocate at a given speed and acceleration; during the experiment, the type and time of each failure are recorded until an irreparable failure occurs. At the end of the test, the average failure interval time is calculated.

[0042] The test method for the fatigue life of rolling linear guide pairs on this test bench is as follows: the hydraulic cylinder 42 in the loading component 4 applies corresponding pressure to the two sets of guide pairs 33 under test, and the other side serves as a mechanical stop column to make the loading forces on both sides equal. The dragging component 5 drags the upper bed 2 to drive the guide rails of the guide pair 33 under test to reciprocate at a given speed and acceleration. If abnormal vibration is found during the experiment, the experiment is stopped immediately, and the peeling and pitting of the guide rails, sliders and rolling elements of the guide pair 33 under test are detected offline. If the peeling and pitting meet the termination conditions specified in the standard, the test is terminated, and the resulting running time or mileage is the fatigue life of the guide pair 33 under the specified pressure.

[0043] The test method of this test bench for the rated dynamic load of the rolling linear guide pair is as follows: the loading component 4 applies a pressure equivalent to the rated dynamic load to the two sets of the tested guide pairs 33, and the dragging component 5 drags the upper bed 2 to drive the guide rails of the tested guide pairs 33 to reciprocate at a given speed and acceleration; so that the tested guide pair 33 moves continuously for 50km under the rated dynamic load loading condition, and the characteristic data of fatigue pitting are reflected by each sensor. If only less than 10% of the products suffer from fatigue pitting, the calibrated rated dynamic load of the product is reasonable and credible.

[0044] The test method of this test bench for the vertical static stiffness of the rolling linear guide pair is: the loading component 4 continuously applies a prescribed pressure to the two sets of the guide pairs 33 under test until the prescribed pressure is reached to ensure that the preload force of the guide pairs 33 under test does not fail, and then records the data of the displacement sensor 38 when the two vertical adapter plates are in contact, calculates the displacement change with the pressure change, and draws a pressure-displacement curve, the slope of the curve is the vertical static stiffness of the guide pair 33 under test.

[0045] The test method of this test bench for the rated static load of the rolling linear guide pair is: the loading component 4 continuously applies increasing pressure to the two sets of the tested guide pairs 33 according to the program, and then records the data of the displacement sensor 38 when the two vertical adapter plates are in contact, calculates the displacement change with the pressure change, and draws the pressure-displacement curve until the stiffness suddenly changes. At this time, the applied pressure is the rated static load of the tested guide pair 33.

[0046] This test bench can carry out multifunctional performance tests, reliability tests, fatigue life tests and static stiffness tests on the same equipment, and can meet the comprehensive measurement of all parameters of rolling linear guide pairs; the loading of this test bench uses a hydraulic system, the loading force is accurate and controllable, the structure is simple, and the power-to-weight ratio is high; this test bench uses a hydraulic system at one end of the loading system and a mechanical stop column unit on the opposite side, which can ensure that the loading forces of the guides on both sides are completely equal; the auxiliary guide pairs and clamps are set under the test assembly rotation state of this test bench, which can solve the problem of lateral bending caused by unequal loading forces on both sides due to errors, and ensure the strength of the structure and the accuracy of the measurement; this test bench uses three contact displacement sensors in the running accuracy measurement, taking into account the distortion measurement of the guides under test, and the calculation of the running accuracy is accurate and reliable; this test bench can realize the test and measurement of rolling linear guide pairs of different models by replacing the measuring frame and the adapter plate, achieving full coverage of rolling linear guide pairs on the market.

[0047] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A horizontal rolling linear guide multifunctional test bench, characterized in that: The invention comprises a lower bed (1), an upper bed (2), a test component (3), a loading component (4), and a drag component (5); the drag component (5) is mounted on the upper surface of the lower bed (1); the upper bed (2) is mounted on the lower bed (1) through the drag component (5); two groups of the test components (3) are provided, and the two groups of the test components (3) are symmetrically mounted on the two side surfaces of the upper bed (2); the loading component (4) spans the lower bed (1) and is fixedly connected to the two sides of the lower bed (1); and the loading component (4) is connected to the slider of the test component (3) through an S-type tension and pressure sensor (34).

2. A horizontal rolling linear guide multifunctional test bench as claimed in claim 1, characterized in that: The lower bed (1) comprises a contact switch block (11), a base (12), an anti-collision device (13), a main rail wedge clamping block (14), a main rail pair (15), a leveling foot (17), and a main rail mounting fence (18); the main rail pair (15) has two sets, which are used for bearing and guiding the upper bed (2) during movement, and the two sets of the main rail pairs (15) are arranged along the length direction of the base (12); the contact switch block (11) is provided with two pieces, and the two contact switch blocks (11) are located on the side of one set of the main rail pairs (15); the main rail mounting fence (18) and the main rail pair (15) are respectively arranged on both sides of the main rail pair (15). The guide rail wedge clamping block (14) and the two main guide rail pairs (15) are both installed in a way that one side is positioned and the other side is fixed. The main guide rail installation fence (18) is used for positioning the main guide rail pair (15) during installation, and the main guide rail wedge clamping block (14) is used for fixing the main guide rail pair (15) during installation; the leveling foot (17) is installed below the base (12), and the leveling foot (17) is used to adjust the overall level of the lower bed (1); the bumper (13) is distributed in pairs at one end of the base (12) to play a role in mechanical protection, and the positions of the two bumpers (13) correspond to the positions of the two main guide rail pairs (15).

3. A horizontal rolling linear guide multifunctional test bench as claimed in claim 2, characterized in that: The upper bed (2) comprises a contact switch (21), a moving plate (22), a secondary guide rail wedge clamping block (23), a secondary guide rail mounting grid (24), a secondary guide rail pair (25), a secondary guide rail slider mounting grid (27), a test assembly mounting grid (28), a mounting table (29), a motion accuracy measurement reference surface (210), a secondary guide rail slider fixing screw mounting surface (211), a primary guide rail slider mounting grid (212), and a primary guide rail slider fixing screw mounting surface (213); the moving plate Two sets of auxiliary guide rail pairs (25) are installed on the moving plate (22), the installation direction of the auxiliary guide rail pairs (25) is perpendicular to the length direction of the lower bed (1), and auxiliary guide rail wedge clamping blocks (23) and auxiliary guide rail installation fences (24) are respectively arranged on both sides of the auxiliary guide rail pairs (25), a mounting platform (29) is arranged above the moving plate (22), the mounting platform (29) is installed on the auxiliary guide rail pairs (25), and a auxiliary guide rail is arranged below the mounting platform (29) at a position corresponding to the auxiliary guide rail pairs (25). The guide rail slider is installed against a grid (27) and a secondary guide rail slider fixing screw installation surface (211), the secondary guide rail slider installation grid (27) and the secondary guide rail slider fixing screw installation surface (211) are respectively located on both sides of the slider of the secondary guide rail pair (25), the slider of the main guide pair (15) is connected to the moving plate (22), and the main guide slider fixing screw installation surface (213) and the main guide slider installation grid (212) are arranged below the moving plate (22), and the main guide slider fixing screw installation surface (213) and the main guide slider fixing screw ... The surface (213) and the main rail slider installation grid (212) are located on both sides of the slider of the main rail pair (15); the mounting platform (29) is used for mounting the test component (3); during installation, the test component installation grid (28) is used for positioning the test component (3); and then the two are fixedly connected; the motion accuracy measurement reference surface (210) is installed on the upper part of the mounting platform (29); and the motion accuracy measurement reference surface (210) is used to cooperate with the motion accuracy measurement of the test component (3).

4. A horizontal rolling linear guide multifunctional test bench as claimed in claim 1, characterized in that: The test assembly (3) comprises a guide rail pair to be tested mounting grid (31), an adapter plate (32), a guide rail pair to be tested (33), an S-type tension and pressure sensor (34), an S-type tension and pressure sensor mounting bracket (35), a contact displacement sensor (36), a temperature sensor (37), a loading block (38), a triaxial vibration sensor (39), a measuring frame (310), and a contact displacement sensor bracket (311); the guide rail pair to be tested (33) is mounted on the adapter plate (32), a guide rail pair to be tested mounting grid (31) is mounted on one side of the guide rail pair to be tested (33), the guide rail pair to be tested mounting grid (31) is used for positioning the guide rail pair to be tested (33) during installation, the S-type tension and pressure sensor (34) is mounted via the S-type tension and pressure sensor mounting bracket (35) The measuring frame (310) is mounted on the measuring frame (310), the measuring frame (310) is fixedly mounted on the loading block (38), the loading block (38) is mounted on the upper surface of the slider of the measured guide rail pair (33), the temperature sensor (37) is adhered to the side of the slider of the measured guide rail pair (33), the three-axis vibration sensor (39) is magnetically attracted to the measuring frame (310), at least one contact displacement sensor (36) is vertically mounted on the measuring frame (310), the parallel measuring frame (311) is mounted on the rear side of the slider of the measured guide rail pair (33), one contact displacement sensor (36) is mounted on the parallel measuring frame (311), and the front end of the contact displacement sensor (36) mounted on the parallel measuring frame (311) is against the side of the slider of the measured guide rail pair (33).

5. A horizontal rolling linear guide multifunctional test bench as claimed in claim 4, characterized in that: The loading assembly (4) comprises a gantry side plate (41), a hydraulic cylinder (42), a gantry upper plate (43), a force sensor adapter block (44), a spoke-type force sensor (45), a loading front end (46), a preload force measuring arm (47), and a baffle (48); the gantry side plates (41) are provided with two pieces, the two gantry side plates (41) are located on both sides of the length direction of the lower bed (1), the force sensor adapter block (44), the spoke-type force sensor (45), the loading front end (46), and the preload force measuring arm (47) are installed on the inner side of the gantry side plates (41), the spoke-type force sensor (45) is installed on the force sensor adapter block (44), and the loading front end (46) is installed on the spoke-type force sensor (45) to receive force. The preload drag force measuring arm (47) is installed on the inner side of the loading front end (46), a hydraulic cylinder (42) is installed on one of the gantry side plates (41), and a force sensor adapter block (44) on the inner side of the gantry side plate (41) on which the hydraulic cylinder (42) is installed is connected to the piston rod of the hydraulic cylinder (42), a baffle plate (48) is installed on the other gantry side plate (41), and a force sensor adapter block (44) on the inner side of the gantry side plate (41) on which the baffle plate (48) is installed is connected to the front end of the baffle plate (48), the gantry upper plate (43) is installed above the two gantry side plates (41), and the two preload drag force measuring arms (47) are connected to the S-type tension and pressure sensors (34) for assisting in the measurement of the preload drag force.

6. A horizontal rolling linear guide multifunctional test bench as claimed in claim 1, characterized in that: The drag assembly (5) comprises a bearing seat (51), a lead screw (52), an upper bed connecting block (53), a lead screw nut (54), an integrated box (55), and a servo motor (56); the bearing seat (51) is provided with a bearing, the integrated box (55) is mounted on one end of the lower bed (1), the servo motor (56) is mounted on one end of the integrated box (56), the lead screw nut (54) is mounted on the lead screw (52), the upper bed connecting block (53) is mounted on the lead screw nut (54), the bearing seat (51) is mounted on the lead screw (52), the bearing seat (51) is mounted on the lower bed (1), and the main shaft of the servo motor (56) and the lead screw (52) are connected together through the integrated box (55).

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