High-speed movement wear test device under bidirectional load pushing

Abstract

The invention belongs to the technical field of airplane structure strength tests, and relates to a high-speed movement abrasion test device under bidirectional load pushing. A chute (100) is fixed through a clamped beam (1), a sliding rail (200) located in the chute (100) is pushed through a left control actuating cylinder and a right control actuating cylinder, the device further comprises a vertical force control actuating cylinder (10) which is fixed on a movable base (12) below the chute (100), the extending end of the vertical force control actuating cylinder (10) is hinged to the bottom of the sliding rail (200), and the movable base (12) is driven by a position control tracking actuating cylinder (14) to move. The motion stroke of the position control tracking actuator cylinder (14) is configured to track the two position control actuator cylinders, so that the movable base (12) driven by the position control tracking actuator cylinder (14) and the sliding rail (200) driven by the two position control actuator cylinders move synchronously. According to the invention, the high-speed linear reciprocating motion wear test of the slide rail under the action of uniformly distributed tangential loads can be realized, and the test efficiency is improved.

Description

Technical Field

[0001] The present application belongs to the technical field of aircraft structure strength testing, and in particular relates to a high-speed motion wear testing device driven by bidirectional loads. Background Art

[0002] Functional failures due to wear are common in aircraft structures and mechanisms, so the specifications stipulate that during the service life and service life, the functions of structural components, elements and main bearing surfaces should not be reduced due to wear within a specified period. Motion wear testing is a necessary condition to verify that such mechanisms meet the engineering assessment of wear performance. Currently, most of the existing experimental studies are component-level assessments based on friction and wear testing machines and full-size structural function assessments based on non-standard tests, while there are few literature reports on detail-level non-standard tests specifically for assessing wear performance. Usually, detail-level wear tests are limited by boundary connections, load application, and test piece geometry, and standard friction and wear testing machines cannot be used for performance verification. Summary of the invention

[0003] In order to solve at least one of the above technical problems, the present application provides a high-speed motion wear test device driven by a bidirectional load, which is applied to the sliding wear test of a slide groove and a slide rail, wherein the test device comprises:

[0004] A fixed support beam is erected above the load-bearing floor, the slideway is fixed below the fixed support beam, a slide rail is arranged in the slideway, and the slide rail has a connecting end passing through a strip hole at the bottom end of the slideway;

[0005] A first position control actuator is arranged on the left side of the slide rail along the moving direction of the slide rail, and a first push rod is connected to the protruding end of the first position control actuator, and the other end of the first push rod can be abutted against the left end surface of the slide rail;

[0006] A second position control actuator is arranged on the right side of the slide rail along the moving direction of the slide rail, and a second push rod is connected to the protruding end of the second position control actuator, and the other end of the second push rod can be abutted against the right end surface of the slide rail;

[0007] A vertical force control actuator is fixed on a movable base below the slideway, and an extended end of the vertical force control actuator is hinged on a connecting end at the bottom of the slideway;

[0008] A position-controlled tracking actuator, the protruding end of which is connected to the movable base to drive the movable base to move in a direction parallel to the direction of the slide groove;

[0009] Among them, when one of the first position control actuator cylinder and the second position control actuator cylinder pushes the slide rail to move, the other retreats to the zero position to move away from the slide rail, and the movement stroke of the position control tracking actuator cylinder is configured to track the first position control actuator cylinder and the second position control actuator cylinder, so that the movable base driven by the position control tracking actuator cylinder and the slide rail driven by the first position control actuator cylinder or the second position control actuator cylinder move synchronously.

[0010] Preferably, the fixed support beam is connected to the slide slot via a transition short beam, and the transition short beam is connected to the end of the slide slot via bolts.

[0011] Preferably, a sensor is arranged between the extended end of the first control actuator and the first push rod, and one end of the first push rod connected to the sensor is arranged as a threaded rod to be threadedly connected to the sensor, and the other end of the first push rod is arranged as a hemispherical surface so that it can fall into the ball socket positioning hole on the left end face of the slide rail.

[0012] Preferably, a sensor is arranged between the protruding end of the second position control actuator and the second push rod, and one end of the second push rod connected to the sensor is arranged as a threaded rod to be threadedly connected to the sensor, and the other end of the second push rod is arranged as a hemispherical surface so that it can fall into the ball socket positioning hole on the right end face of the slide rail.

[0013] Preferably, the protruding end of the vertical force-controlled actuator is hinged to the connecting end at the bottom of the slide rail through a transition pull plate, and the transition pull plate has a wide end that is fully contacted with the connecting end at the bottom of the slide rail, and the other end is contracted to a narrow end, and the narrow end is connected to a force sensor through two ears, and the other end of the force sensor is connected to the protruding end of the vertical force-controlled actuator.

[0014] Preferably, the vertical force control actuator is connected to the movable base through an actuator support, and the movable base is installed on a linear guide rail laid on a load-bearing floor through a guide rail pair, and a connecting ear is provided on the side of the movable base to hingedly connect the position control tracking actuator.

[0015] The present application can realize the high-speed linear reciprocating motion wear test of the slide rail under the action of uniformly distributed tangential load, improves the test efficiency, and helps to accelerate the wear characteristic design process of the slide rail. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the high-speed motion wear test device driven by bidirectional loads in the present application.

[0017] Figure 2 For this application Figure 1 A schematic diagram of the connection between the slide groove and the slide rail of the illustrated embodiment.

[0018] Among them, 1-fixed support beam, 2-transfer short beam, 3-second push rod, 4-first push rod, 5-first position control actuator, 6-column, 7-transition pull plate, 8-double ears, 9-force sensor, 10-vertical force control actuator, 11-actuator support, 12-movable base, 13-second position control actuator, 14-position control tracking actuator, 15-load-bearing floor, 100-slide groove, 200-slide rail. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme and advantages of the implementation of this application clearer, the technical scheme in the implementation of this application will be described in more detail in combination with the drawings in the implementation of this application. In the drawings, the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The described implementation is a part of the implementation of this application, not all of the implementations. The implementation described below with reference to the drawings is exemplary and is intended to be used to explain this application, and cannot be understood as a limitation on this application. Based on the implementation in this application, all other implementations obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. The implementation of this application is described in detail below in combination with the drawings.

[0020] The present application provides a high-speed motion wear test device driven by a bidirectional load, which is applied to the sliding wear test of a slide groove 100 and a slide rail 200. Figure 1 and Figure 2 As shown, the test device mainly includes:

[0021] The fixed support beam 1 is erected above the load-bearing floor 15, and the slide 100 is fixed below the fixed support beam 1. The slide 100 is provided with a slide rail 200, and the slide rail has a connecting end passing through the strip hole at the bottom end of the slide 100;

[0022] The first position control actuator 5 is arranged on the left side of the slide rail 200 along the moving direction of the slide rail. The first position control actuator 5 is connected to the first push rod 4 at its protruding end. The other end of the first push rod 4 can be abutted against the left end surface of the slide rail 200.

[0023] The second position control actuator 13 is arranged on the right side of the slide rail 200 along the moving direction of the slide rail. The second push rod 3 is connected to the extended end of the second position control actuator 13. The other end of the second push rod 3 can be abutted against the right end surface of the slide rail 200.

[0024] The vertical force control actuator 10 is fixed on the movable base 12 below the slideway 100, and the extended end of the vertical force control actuator 10 is hinged to the connecting end at the bottom of the slideway 200;

[0025] A position control tracking actuator 14, whose extended end is connected to the movable base 12, so as to drive the movable base 12 to move in a direction parallel to the groove direction of the slide groove 100;

[0026] When one of the first position control actuator 5 and the second position control actuator 13 pushes the slide rail 200 to move, the other retreats to the zero position to move away from the slide rail 200, and the movement stroke of the position control tracking actuator 14 is configured to track the first position control actuator 5 and the second position control actuator 13, so that the movable base 12 driven by the position control tracking actuator 14 and the slide rail 200 driven by the first position control actuator 5 or the second position control actuator 13 move synchronously.

[0027] The present application fixes and constrains the slide groove 100 of the test piece by using the fixation beam 1, thereby solving the support and loading problems of the high-speed motion wear test with limited boundary connection and weak end strength of the test piece.

[0028] The present application realizes the follow-up loading of the tangential force in the wear test by means of the vertical force-controlled actuator 10 installed on the movable base 12. When the slide rail 200 slides and wears in the slide groove 100, the vertical force-controlled actuator 10 applies a tangential force to the slide rail 200, thereby increasing the friction between the slide groove 100 and the slide rail 200, thereby improving the efficiency of the wear test. At the same time, when the first position-controlled actuator 5 and the second position-controlled actuator 13 push the test piece to move, the motion displacement signal is fed back to the position-controlled tracking actuator 14, and the position-controlled tracking actuator 14 gives the same displacement instruction to push the movable base 12 and the vertical force-controlled actuator 10 thereon to run the same distance to maintain the verticality of the vertical force loading and realize the follow-up loading. In this embodiment, the motion control program of the above-mentioned actuator is determined according to the running speed requirement of the test piece slide rail, and the control programs of the three position-controlled actuators are set to complete a reciprocating motion under the high-speed operation of the test piece slide rail.

[0029] The first position control actuator 5 and the second position control actuator 13 of the present application cooperate to realize the motion wear test of the test piece based on the bidirectional pushing method, which also avoids the risk of damage to the test piece caused by the driving force loading in the pull-push method. At the same time, during the motion control process, through the zero position return setting, that is, when the first position control actuator 5 pushes the slide rail forward, the second position control actuator 13 retreats to the zero position, and vice versa, thereby preventing the slide rail from vibrating and colliding with the other position control actuator cylinder caused by the movement of one position control actuator cylinder, especially during the high-speed movement of the slide rail, this method can prevent the high-speed collision between the test piece and the push rod.

[0030] It should also be noted that four columns 6 are arranged on the load-bearing floor 15, the two middle columns are used to connect with the fixed support beam to fix the slide, and the two columns on both sides are used to connect with the first position control actuator cylinder 5, the second position control actuator cylinder 13 and the position control tracking actuator cylinder 14.

[0031] The present application is applied to high-speed motion wear tests of slide rail mechanisms, and provides a loading design method for wear tests for slide rail mechanisms whose test piece boundary dimensions and strength do not meet the design requirements of conventional wear tests, thereby effectively reducing test processing costs and test operation risks and improving test efficiency.

[0032] In some optional embodiments, the fixed support beam 1 is connected to the slide slot 100 via a transition short beam 2, and the transition short beam 2 is connected to the end of the slide slot 100 via bolts.

[0033] The end of the slide 100 of the present application is vertically constrained. During installation, the end of the specimen slide needs to be configured with bolt holes consistent with the transition short beam 2 to form a vertical fixed constraint. The design of the transition short beam 2 in the test system facilitates the installation and replacement of the specimen, thereby improving the test efficiency.

[0034] In some optional embodiments, a sensor is arranged between the extended end of the first control actuator 5 and the first push rod 4, and one end of the first push rod 4 connected to the sensor is set as a threaded rod to be threadedly connected to the sensor, and the other end of the first push rod 4 is set as a hemispherical surface so that it can fall into the ball socket positioning hole on the left end face of the slide rail 200.

[0035] In some optional embodiments, a sensor is arranged between the protruding end of the second position control actuator 13 and the second push rod 3, and one end of the second push rod 3 connected to the sensor is set as a threaded rod to be threadedly connected to the sensor, and the other end of the second push rod 3 is set as a hemispherical surface so that it can fall into the ball socket positioning hole on the right end face of the slide rail 200.

[0036] The sensor here is a force control sensor. In this embodiment, the push rod is installed in front of the position control actuator and the sensor. The rod axis is colinear with the central axis of the actuator and the sensor, and the rod end is hemispherical, which is used to keep the thrust consistent with the central axis of the end of the friction surface of the specimen slide rail during loading. Therefore, before the test, ball and socket positioning holes consistent with the push rod need to be configured at both ends of the specimen slide rail.

[0037] In some optional embodiments, the protruding end of the vertical force control actuator 10 is hinged to the connecting end at the bottom of the slide rail 200 through a transition pull plate 7, and the transition pull plate 7 has a wide end that is fully contacted with the connecting end at the bottom of the slide rail 200, and the other end is contracted to a narrow end, and the narrow end is connected to a force sensor 9 through two ears 8, and the other end of the force sensor 9 is connected to the protruding end of the vertical force control actuator 10.

[0038] In this embodiment, the transition pull plate is used to keep the axis of the actuator consistent with the center line of the thickness of the specimen slide rail on the one hand, and on the other hand, the wide end of the transition pull plate 7 can be adapted to be fully connected to the bottom of the slide rail 200, so that the load of the actuator can be evenly distributed on the slide rail 200, ensuring the reliability and stability of the test.

[0039] In some optional embodiments, the vertical force control actuator 10 is connected to the movable base 12 through the actuator support 11. The movable base 12 is installed on a linear guide rail laid on the load-bearing floor 15 through a guide rail pair. The side of the movable base 12 is provided with a connecting ear piece to hingedly connect the position control tracking actuator 14.

[0040] The motion wear test device for the slide rail mechanism proposed in this application solves the problem that the specimen loading boundary strength is too weak to withstand the tensile load required for the test to reciprocate through the bidirectional push loading method of "two-side push rods + position control actuator" at both ends. In addition, compared with conventional wear testing machines, the boundary constraints and specimen size are not restricted, and the fixture can be designed according to specific needs. This application adopts a push rod design, combined with the specimen machining positioning to achieve the coincidence of the driving force loading axis and the center line of the specimen end during movement, ensuring the correctness of the driving force application. In combination with the loading characteristics of bidirectional push, this application proposes a method of zero-position regression setting of the test control program to prevent high-speed collision between the specimen and the push rod, thereby protecting the safety of the specimen and reducing the risk of the test.

[0041] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A high-speed motion wear test device driven by bidirectional loads, applied to the sliding wear test of a slide groove (100) and a slide rail (200), characterized in that: The device includes: A fixed support beam (1) is erected above the load-bearing floor (15), the slide groove (100) is fixed below the fixed support beam (1), a slide rail (200) is arranged in the slide groove (100), and the slide rail has a connecting end passing through the strip hole at the bottom end of the slide groove (100); A first control actuator (5) is arranged on the left side of the slide rail (200) along the moving direction of the slide rail, and the protruding end of the first control actuator (5) is connected to a first push rod (4), and the other end of the first push rod (4) can be abutted against the left end surface of the slide rail (200); A second position control actuator (13) is arranged on the right side of the slide rail (200) along the moving direction of the slide rail, and the protruding end of the second position control actuator (13) is connected to a second push rod (3), and the other end of the second push rod (3) can be abutted against the right end surface of the slide rail (200); A vertical force control actuator (10) is fixed on a movable base (12) below the slideway (100), and an extended end of the vertical force control actuator (10) is hinged to a connecting end at the bottom of the slideway (200); A position-controlled tracking actuator (14), the protruding end of which is connected to the movable base (12) to drive the movable base (12) to move in a direction parallel to the groove direction of the slide groove (100); When one of the first position-controlled actuator (5) and the second position-controlled actuator (13) pushes the slide rail (200) to move, the other one retreats to the zero position to move away from the slide rail (200), and the movement stroke of the position-controlled tracking actuator (14) is configured to track the first position-controlled actuator (5) and the second position-controlled actuator (13), so that the movable base (12) driven by the position-controlled tracking actuator (14) and the slide rail (200) driven by the first position-controlled actuator (5) or the second position-controlled actuator (13) move synchronously.

2. The high-speed motion wear test device driven by bidirectional load as claimed in claim 1, characterized in that: The fixed support beam (1) is connected to the slide groove (100) via a short transfer beam (2), and the short transfer beam (2) is connected to the end of the slide groove (100) via bolts.

3. The high-speed motion wear test device driven by bidirectional load as claimed in claim 1, characterized in that: A sensor is arranged between the protruding end of the first control actuator cylinder (5) and the first push rod (4); one end of the first push rod (4) connected to the sensor is arranged as a threaded rod to be threadedly connected to the sensor; the other end of the first push rod (4) is arranged as a hemispherical surface so as to be able to fall into the ball socket positioning hole on the left end surface of the slide rail (200).

4. The high-speed motion wear test device under bidirectional load as claimed in claim 1, characterized in that: A sensor is arranged between the protruding end of the second position control actuator cylinder (13) and the second push rod (3); one end of the second push rod (3) connected to the sensor is arranged as a threaded rod to be threadedly connected to the sensor; the other end of the second push rod (3) is arranged as a hemispherical surface so as to be able to fall into the ball socket positioning hole on the right end surface of the slide rail (200).

5. The high-speed motion wear testing device under bidirectional load as claimed in claim 1, characterized in that: The extended end of the vertical force control actuator (10) is hinged to the connecting end at the bottom of the slide rail (200) through a transition pull plate (7), the transition pull plate (7) has a wide end that is fully contacted with the connecting end at the bottom of the slide rail (200), and the other end is contracted to a narrow end, the narrow end is connected to a force sensor (9) through two ears (8), and the other end of the force sensor (9) is connected to the extended end of the vertical force control actuator (10).

6. The high-speed motion wear testing device driven by bidirectional loads as claimed in claim 1, characterized in that: The vertical force control actuator (10) is connected to a movable base (12) via an actuator support (11); the movable base (12) is installed on a linear guide rail laid on a load-bearing floor (15) via a guide rail pair; a connecting lug is provided on the side of the movable base (12) to hinge-connect the position control tracking actuator (14).

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