Rolling linear guide rail pair wear running-in device and test method thereof

Abstract

The invention belongs to the technical field of mechanical product abrasion, and particularly relates to a method for testing abrasion of a rolling linear guide rail pair. The guide rail pairs are combined and installed in pairs, multiple sets of samples connected in series through the sliding blocks can be tested at the same time, the sliding blocks are static during testing, the reciprocating workbench pulls the tested guide rails to do reciprocating linear movement in two directions, and the tension effect on the guide rails along the center line of a raceway is formed. The multi-action hydraulic loading mechanism equivalently transmits a load to a position between a guide rail and a sliding block of each tested guide rail pair through a sample sliding block connected with the multi-action hydraulic loading mechanism, and can apply four types of loads: 1, horizontal force vertical to a reciprocating motion direction; 2, a couple moment acting along a horizontal plane; 3, a couple moment acting along a vertical plane parallel to the reciprocating movement direction; and 4, a couple moment acting along a vertical plane perpendicular to the reciprocating motion direction. On the basis, the abrasion and the service life change of the guide rail pair under the condition that the guide rail pair bears all kinds of loads can be tested and verified through two changes of sample combination and installation modes.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical product wear, in particular to a test method for wear of a rolling linear guide pair. Background Art

[0002] Rolling linear guides have the advantages of high motion sensitivity, low friction, and smooth low-speed motion. They are important functional components that directly affect the accuracy and life of machine tools. The service life of the rail has a direct impact on the machining accuracy and life of the machine tool. After the machine tool has been used for a certain period of time, uneven wear will occur on the guide surface, accompanied by fatigue pitting of the rolling elements, causing the spindle mounting slide to shift in the horizontal and vertical planes, resulting in a decrease in the machining accuracy of the workpiece. By improving the guide pair structure, materials, surface treatment process, lubrication method and other parameters, the wear of the guide pair can be reduced, the use time of the guide can be extended as much as possible, and the life of the machine tool can be improved. The verification of the actual life of the guide is currently mostly theoretical calculations. It is necessary to develop a wear test device and method for the long-term running-in between the guide and the slider to provide actual data basis for new product development or product improvement.

[0003] Currently, the industry mostly uses running-in test machines to complete guide rail life tests, which are unable to verify the changes in life under different loading conditions. There is currently a lack of dedicated rolling linear guide rated dynamic load test equipment and methods with large loading capacity. Summary of the invention

[0004] In view of the above-mentioned shortcomings of the prior art, the present invention provides a rolling linear guide pair wear running-in device, which works by reciprocating the workbench to move left and right, continuously testing the wear condition between the slider and the guide pair, thereby realizing a specific test method for the wear running-in device.

[0005] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0006] A rolling linear guide pair wear and running-in device comprises: a base, a loading mechanism, an adjustable mounting seat and a reciprocating worktable, wherein the loading mechanism and the adjustable mounting seat are directly fixed on the base, and a guide pair test unit group is installed between the loading mechanism and the adjustable mounting seat; a double cylindrical shaft is provided below the reciprocating worktable, the double cylindrical shaft is a supporting double beam of the reciprocating worktable, and is nested in a linear bearing installed on the base and connected to the base.

[0007] As a preferred solution, driving connection components are respectively provided on both sides of the reciprocating workbench, and a guide rail pair test unit group is installed between the driving connection components.

[0008] A method for testing a wear and running-in device of a rolling linear guide pair comprises the following steps:

[0009] S1 Guideway pair test unit group installation: The slider and the guideway form a guideway pair. During operation, the slider is stationary and the guideway moves back and forth. It is not possible to test a single guideway pair. During the test, the guideway pairs must be combined in pairs to form a guideway pair test unit group. The combination forms are divided into two types: A and B, namely: guideway pair test unit group A and guideway pair test unit group B. Both combinations can realize simultaneous testing of multiple guideway pair test unit groups in the form of multiple groups connected in series;

[0010] S2 guide rail pair running-in motion: the moving direction is consistent with the limited moving direction of the guide rail pair test unit group, the length of the reciprocating workbench is greater than the length of the guide rail, and both ends of the reciprocating moving workbench are provided with drive connection components equal to the guide rail pair test unit group, and the drive connection components are respectively connected to the two ends of the guide rail parts of each guide rail pair test unit group; after the drive connection components are installed, the reciprocating workbench and each guide rail part will form a smooth contact surface constraint relationship;

[0011] S3 Apply load: Four types of loads can be applied between each pair of guide rails and sliders on the test unit group of the guide rail pair: horizontal force perpendicular to the reciprocating direction, moment acting along the horizontal plane, moment acting along the vertical plane parallel to the reciprocating direction, and moment acting along the vertical plane perpendicular to the reciprocating direction.

[0012] When the specimen is installed in the combination form of guide rail pair test unit group A, the four corresponding loads between the guide rail and the slider of the tested guide rail pair are: vertical force FY, pitch moment MA, yaw moment MB, and tilt moment MC.

[0013] When the specimen is installed in the combination form of guide rail pair test unit group B, the four corresponding loads between the guide rail and the slider of the tested guide rail pair are: lateral force FX, yaw moment MB, pitch moment MA, and tilt moment MC.

[0014] As a preferred solution: Installation of the guide rail sub-test unit group A: The loading mechanism includes a transition connector and a loading adapter plate, a transition connector is installed between the loading adapter plate and the adjustable mounting seat, the bottom surface of the guide rail sub-test unit group A is rigidly fixed to the bottom surface, the slider mounting surface D is directly fixed on the specimen mounting seat, and the other slider mounting surface C is connected to the loading mechanism through the loading adapter plate.

[0015] As a preferred solution: Installation of the guide rail sub-test unit group B: the loading mechanism includes a transition connector and an L-shaped specimen adapter plate, and the guide rail sub-test unit group B is fixed in parallel and in the same direction on the test guide rail mounting plate. At this time, the slider mounting surface C is perpendicular to the mounting plane of the specimen mounting seat, and the two slider mounting surfaces C and the mounting surface D are respectively connected to the loading mechanism and fixed to the specimen mounting seat via the L-shaped specimen adapter plate.

[0016] The present invention has the following beneficial effects:

[0017] The guide rails are installed in pairs, and multiple groups of specimens connected in series by sliders can be tested simultaneously. During the test, the sliders are stationary, and the reciprocating workbench pulls the tested guide rails to move back and forth in a straight line in both directions, forming a tensile force on the guide rails along the center line of the raceway; the multi-acting hydraulic loading mechanism transfers the load equivalently to the guide rails and sliders of each tested guide rail pair through the sample slider connected to the mechanism, and can apply four types of loads: 1. Horizontal force perpendicular to the reciprocating direction; 2. Couple moment acting along the horizontal plane; 3. Couple moment acting along the vertical plane parallel to the reciprocating direction; 4. Couple moment acting along the vertical plane perpendicular to the reciprocating direction. On this basis, through two changes in the combination of specimens and the installation method, the wear and life changes of the guide rail pair under all types of loads can be tested and verified. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0019] Figure 1 This is a schematic structural diagram of a rolling linear guide pair wear running-in device of the present invention;

[0020] Figure 2 It is a schematic diagram of the operation of a rolling linear guide pair wear running-in device of the present invention;

[0021] Figure 3 It is a structural schematic diagram of a single guide pair 22 of a rolling linear guide pair wear running-in device embodiment 1 of the present invention;

[0022] Figure 4 It is a structural schematic diagram of a guide rail pair test unit group A8 of Embodiment 1 of a rolling linear guide rail pair wear running-in device of the present invention;

[0023] Figure 5 It is a structural schematic diagram of a single guide pair 22 of a rolling linear guide pair wear running-in device embodiment 2 of the present invention;

[0024] Figure 6 It is a structural schematic diagram of a guide rail pair test unit group B9 of Embodiment 2 of a rolling linear guide rail pair wear running-in device of the present invention;

[0025] Figure 7 Schematic diagram of the guide rail pair 22 of the present invention bearing four types of loads;

[0026] Figure 8 It is a working schematic diagram of the loading mechanism 4 of the present invention.

[0027] 1. Reciprocating workbench; 2. Driving connection component; 3. Base; 4. Loading mechanism; 5. Loading adapter plate; 6. Transition connection piece; 7. Adjustable mounting seat; 8. Guide rail pair test unit group A; 9. Guide rail pair test unit group B; 10. Guide rail pair test unit group; 11. Double cylindrical shaft; 12. Slider mounting surface C; 13. Slider mounting surface D; 14. Slider mounting surface E; 15. Mounting surface F; 16. L-shaped specimen adapter plate; 17. Hydraulic cylinder group I; 18. Hydraulic cylinder group O; 19. Hydraulic cylinder group U; 20. Bearing component; 21. Test guide rail mounting plate; 22. Guide rail pair. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0029] See also Figure 1-8 As shown, a rolling linear guide pair wear and running-in device includes: a base 3, a loading mechanism 4, an adjustable mounting seat 7 and a reciprocating workbench 1, wherein the loading mechanism 4 and the adjustable mounting seat 7 are directly fixed on the base 3, and a guide pair test unit group 10 is installed between the loading mechanism 4 and the adjustable mounting seat 7; a double cylindrical shaft 11 is provided below the reciprocating workbench 1, and the double cylindrical shaft 11 is a supporting double beam of the reciprocating workbench 1, which is nested in a linear bearing installed on the base 3 and connected to the base 3. Drive connection components 2 are respectively provided on both sides of the reciprocating workbench 1, and a guide pair test unit group 10 is installed between the drive connection components 2.

[0030] A method for testing a wear and running-in device of a rolling linear guide pair comprises the following steps:

[0031] S1 Guide rail pair test unit group installation: The slider and the guide rail form a guide rail pair 22. During operation, the slider is stationary and the guide rail moves back and forth. It is not possible to test a single guide rail pair 22. During the test, the guide rail pair 22 needs to be combined in pairs to form a guide rail pair test unit group 10. The combination of the guide rail pair test unit group 10 is divided into two types: guide rail pair test unit group A8 and guide rail pair test unit group B9.

[0032] S2 guide rail pair running-in motion: the fixed-range and adjustable-speed reciprocating workbench 1 drives each guide rail to move simultaneously, and the moving direction is consistent with the limited movement direction of the sample guide rail pair. The length of the reciprocating workbench 1 is greater than the length of the guide rail. Both ends of the reciprocating workbench 1 are provided with driving connection components 2 of the same number as the guide rail pair test unit group 10, which are respectively connected to the two ends of the guide rail parts of each guide rail pair test unit group 10. After the driving connection components 2 are installed, the reciprocating workbench 1 and each guide rail part will form a smooth contact surface constraint relationship;

[0033] S3 Load application: Four loads can be applied between the guide rail and the slider in each guide rail pair 22 of the guide rail pair test unit group 10: 1. Horizontal force perpendicular to the reciprocating direction; 2. Couple moment acting along the horizontal plane; 3. Couple moment acting along the vertical plane parallel to the reciprocating direction; 4. Couple moment acting along the vertical plane perpendicular to the reciprocating direction ( Figure 7 ).

[0034] Example 1

[0035] Installation of the guide rail test unit group A8: The loading mechanism 4 includes a transition connector 6 and a loading adapter plate 5. The transition connector 6 is installed between the loading adapter plate 5 and the adjustable mounting seat 7. The bottom surface of the guide rail pair 22 is rigidly fixed to the bottom surface. The slider mounting surface C12 is directly fixedly installed on the sample mounting seat 7, and the other slider mounting surface D13 is connected to the loading mechanism 4 through the loading adapter plate 5 (such as Figure 4 ); The guide rail auxiliary test unit group A8 can be formed by combining two groups Figure 1 The main thing is that there is a load-bearing member 20 in the loading mechanism 4. During the test, the load-bearing member 20 is rigidly connected to the slider mounting surface C12 through the loading adapter plate 5. The three groups of hydraulic cylinders of the slider (4 in each group, with the same specifications) are arranged on three mutually perpendicular planes of the load-bearing member 20, among which the action surfaces of cylinders 1-4 are XY planes to form hydraulic cylinder group I17, the action surfaces of cylinders 5-8 are YZ planes to form hydraulic cylinder group O18, and the action surfaces of cylinders 9-12 are XZ planes to form hydraulic cylinder group U19 (such as Figure 2 ).

[0036] When the first cylinder and the fourth cylinder of the hydraulic cylinder group I17 are operated or the second cylinder and the third cylinder are loaded, the action on the bearing member 20 is positive and negative action along the X-axis, which can correspond to the loading of the vertical force FY; when the first cylinder and the third cylinder of the hydraulic cylinder group I17 are operated or the second cylinder and the fourth cylinder are loaded, the action on the bearing member 20 is positive and negative action around the Z-axis, which can correspond to the loading of the tilting moment MC; when the fifth cylinder and the seventh cylinder of the hydraulic cylinder group O18 are operated or the sixth cylinder and the eighth cylinder are loaded, the action on the bearing member 20 is positive and negative action around the Y-axis, which can correspond to the loading of the pitching moment MA; when the ninth cylinder and the eleventh cylinder of the hydraulic cylinder group U19 are operated or the tenth cylinder and the twelfth cylinder are loaded, the action on the bearing member 20 is positive and negative action around the X-axis, which can correspond to the loading of the yaw moment MB;

[0037] That is, the four loads that will be borne between the guide rail and the slider in the guide rail pair test unit group A8 are: vertical force FY, tilt moment MC, pitch moment MA, and yaw moment MB.

[0038] Example 2

[0039] Installation of the guide rail auxiliary test unit group B9: The loading mechanism 4 includes a transition connector 6 and an L-shaped sample adapter plate 16. The guide rail auxiliary test unit group B9 is fixed on the test guide rail mounting plate 21 in parallel and in the same direction. At this time, the slider mounting surface E14 is perpendicular to the mounting plane of the sample mounting seat 7. The two slider mounting surfaces E14 and the mounting surface F15 are respectively connected to the loading mechanism 4 and fixed to the sample mounting seat 7 via the L-shaped sample adapter plate 16 (such as Figure 6 ). During the test, the load-bearing member 20 is rigidly connected to the slider mounting surface E13 through the L-shaped specimen adapter plate 16. The main reason is that the load-bearing member 20 is provided in the loading mechanism 4, and the load-bearing member 20 is rigidly connected to the slider mounting surface C12 through the loading adapter plate 5 during the test; similarly, the positive and reverse forces of the hydraulic cylinder group I17 on the load-bearing member 20 along the X-axis can correspond to the loading of the lateral force FX; the positive and reverse torques of the hydraulic cylinder group I17 on the load-bearing member 20 around the Z-axis can correspond to the loading of the tilting torque MC; the positive and reverse torques of the hydraulic cylinder group O18 on the load-bearing member 20 around the Y-axis can correspond to the loading of the yaw torque MB; the positive and reverse torques of the hydraulic cylinder group U19 on the load-bearing member 20 around the X-axis can correspond to the loading of the pitching torque MA.

[0040] That is, the four loads that will be borne between the guide rail and the slider in the guide rail pair test unit group B9 are: lateral force FX, tilt moment MC, yaw moment MB, and pitch moment MA.

[0041] The above are only preferred embodiments of the present invention and do not limit the present invention. Any modification to the technical solutions recorded in the aforementioned embodiments, any equivalent replacement of some of the technical features therein, and any modification, equivalent replacement, and improvement made are all within the protection scope of the present invention.

Claims

1. A rolling linear guide pair wear running-in device, characterized in that: include: A base (3), a loading mechanism (4), an adjustable mounting seat (7) and a reciprocating worktable (1); the loading mechanism (4) and the adjustable mounting seat (7) are directly fixed on the base (3); a guide rail pair test unit group (10) is installed between the loading mechanism (4) and the adjustable mounting seat (7); a double cylindrical shaft (11) is provided below the reciprocating worktable (1); the double cylindrical shaft (11) is a supporting double beam of the reciprocating worktable (1), and is nested in a linear bearing installed on the base (3) and connected to the base (3).

2. A rolling linear guide pair wear and running-in device according to claim 1, characterized in that: Drive connection components (2) are respectively provided on both sides of the reciprocating workbench (1), and a guide rail pair test unit group (10) is installed between the drive connection components (2).

3. A rolling linear guide pair wear running-in device test method according to claim 1, characterized in that: The following steps are involved: S1 installation of guide rail pair test unit group: the slider and the guide rail form a guide rail pair (22), the slider is stationary during operation, and the guide rail moves back and forth; it is not possible to test a single guide rail pair (22), and during the test, the guide rail pairs must be combined in pairs to form a guide rail pair test unit group (10), and the combination forms are divided into two types: A and B, namely: guide rail pair test unit group A (8) and guide rail pair test unit group B (9), and both combinations can realize simultaneous testing of multiple guide rail pair test unit groups [(8) or (9)] in a multiple group serial connection manner; S2 guide rail pair running-in motion: a fixed-range and adjustable-speed reciprocating workbench (1) drives each guide rail to move simultaneously, and the moving direction is consistent with the movement direction limited by the guide rail pair test unit group (10). The length of the reciprocating workbench (1) is greater than the length of the guide rail. Both ends of the reciprocating workbench (1) are provided with drive connection components (2) equal to the number of guide rail pair test unit groups (10). The drive connection components (2) are respectively connected to the two ends of the guide rail parts of each guide rail pair test unit group (10); S3 applies load: four types of loads can be applied between each pair of guide rails and the slider on the guide rail pair test unit group (10): 1) horizontal force perpendicular to the reciprocating direction; 2) moment of force acting along the horizontal plane; 3) moment of force acting along the vertical plane parallel to the reciprocating direction; 4) moment of force acting along the vertical plane perpendicular to the reciprocating direction.

4. A rolling linear guide pair wear running-in device test method according to claim 3, characterized in that: Installation of the S1 guide rail auxiliary test unit group A (8): the loading mechanism (4) includes a transition connector (6) and a loading adapter plate (5), a transition connector (6) is installed between the loading adapter plate (5) and the adjustable mounting seat (7), the bottom surface of the guide rail auxiliary test unit group A (8) is rigidly fixed to the bottom surface, wherein the slider mounting surface D (13) is directly fixedly mounted on the sample mounting seat (7), and the other slider mounting surface C (12) is connected to the loading mechanism (4) through the loading adapter plate (5).

5. A rolling linear guide pair wear running-in device test method according to claim 3, characterized in that: The installation of the S1 guide rail auxiliary test unit group B (9): the loading mechanism (4) includes a transition connector (6) and an L-shaped specimen adapter plate (16); the guide rail auxiliary test unit group B (9) is fixed in parallel and in the same direction on the test guide rail mounting plate (21) inside the reciprocating workbench (1); at this time, the slider mounting surface E is perpendicular to the mounting plane of the specimen mounting seat (7); the two slider mounting surfaces E (14) and the mounting surface F (15) are respectively connected to the loading mechanism (4) and the adjustable mounting seat (7) via the L-shaped specimen adapter plate (16).

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