Simple friction and wear testing machine based on vertical drilling machine

Abstract

The application relates to the technical field of friction and wear testing machines, in particular to a simple friction and wear testing machine based on a vertical drilling machine, which comprises a vertical drilling machine bed body, a hydraulic rod is arranged on the vertical drilling machine bed body, a stepping motor is arranged on the telescopic end of the hydraulic rod, and a threaded shaft is further arranged; the upper end of the threaded shaft is connected with the output shaft of the stepping motor, an upper circular table is fixedly connected to the lower end of the outer side surface of the threaded shaft, a cylindrical groove is arranged on the lower surface of the upper circular table, a friction disc is arranged on the outer side surface of the threaded shaft, and the friction disc is arranged in the cylindrical groove; compared with a traditional special friction and wear testing device, the core advantage of the simple friction and wear testing machine based on the vertical drilling machine lies in that the diversification of functions is realized through innovative modular design; through the design of interchangeable V-shaped seats and U-shaped seats, in combination with the friction disc which can float up and down and can be replaced with materials, the testing machine can flexibly and conveniently simulate and test various contact forms and motion forms of friction pairs.

Description

Technical Field

[0001] This application relates to the field of friction and wear testing machine technology, specifically a simple friction and wear testing machine based on a vertical drilling machine. Background Technology

[0002] Friction and wear are major causes of material failure and energy loss. Currently, numerous methods have been employed to control friction and wear on friction pairs. Meanwhile, friction and wear testing machines, as important tools for verifying the tribological properties of material surfaces, have received increasing attention. However, most existing friction and wear testing machines can only perform friction and wear tests on single-type friction pairs. Furthermore, the few machines capable of testing multiple types of friction pairs are complex in structure and expensive. In summary, the limitations in functionality and cost of existing friction and wear testing machines significantly restrict the development of tribological research. Utility Model Content

[0003] This application provides a simple friction and wear testing machine based on a vertical drilling machine. It has a compact structure, low price, and can perform friction and wear testing on friction pairs with various contact and motion modes, which can effectively solve the problems in the background art.

[0004] To achieve the above objectives, this application provides the following technical solution: a simple friction and wear testing machine based on a vertical drilling machine, including a vertical drilling machine bed, a hydraulic rod on the vertical drilling machine bed, a stepper motor installed at the telescopic end of the hydraulic rod, and a threaded shaft; the upper end of the threaded shaft is connected to the output shaft of the stepper motor, an upper truncated cone is fixedly connected to the lower end of the outer side of the threaded shaft, a cylindrical groove is provided on the lower surface of the upper truncated cone, a friction disk is installed on the outer side of the threaded shaft, and the friction disk is located inside the cylindrical groove.

[0005] It also includes a lower truncated cone, with at least one support block installed on the upper edge of the lower truncated cone, and a test piece placed in the groove of the support block.

[0006] The upper surface edge of the friction disc is connected to the inner side of the cylindrical groove via a spring.

[0007] Preferably, the friction disc is constrained to the threaded shaft by a nut.

[0008] Preferably, the outer surface edge of the lower truncated cone is provided with no less than two mounting holes, and bolts pass through the mounting holes to fix the lower truncated cone to the bed of the vertical drilling machine.

[0009] Preferably, a machining groove is provided in the middle of the upper surface of the lower frustum.

[0010] Preferably, the springs are positioned directly above the support blocks, and the number of springs is the same as the number of support blocks.

[0011] Preferably, the diameter of the friction disc is 0.5 mm larger than the diameter of the threaded shaft to ensure that the friction disc floats up and down under the action of the spring.

[0012] Preferably, the support block includes a mounting plate, which is fixed to the lower circular platform by bolts. A V-shaped seat is provided on the upper surface of the mounting plate, and a rectangular friction plate is provided on the inner side of the V-shaped seat. The test piece is provided on the inner side of the V-shaped seat.

[0013] Preferably, the support block includes a second mounting plate, which is fixed to the lower circular platform by bolts. A U-shaped seat is provided on the upper surface of the second mounting plate, and an arc-shaped friction plate is provided on the inner side of the U-shaped seat. The test piece is provided on the inner side of the arc-shaped friction plate.

[0014] Compared with the prior art, the beneficial effects of this application are:

[0015] 1. The simplified friction and wear testing machine based on a vertical drilling machine proposed in this utility model has the core advantage of achieving functional diversification through innovative modular design compared to traditional dedicated friction and wear testing devices. By designing interchangeable V-shaped and U-shaped seats, combined with a friction disc that can float up and down and has replaceable materials, this testing machine can flexibly and conveniently simulate and test friction pairs with various contact and motion forms. This modular design concept cleverly utilizes the basic frame of the vertical drilling machine, greatly expanding the testing capability range of a single device.

[0016] 2. The friction disc bore diameter is slightly larger than the threaded shaft diameter, and the design with a spring allows the friction disc to adaptively float up and down during operation. This design not only ensures the uniformity and stability of the contact pressure of the friction pair, but also, especially when conducting tests on friction pairs with non-rigid contact or requiring a certain self-aligning capability, it can more realistically simulate actual working conditions and obtain more accurate tribological data compared to traditional rigid connection testing machines. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this application;

[0018] Figure 2 This is a schematic diagram of the installation position of this application on a vertical drilling machine;

[0019] Figure 3 This is a cross-sectional view of this application;

[0020] Figure 4 This is a schematic diagram of the support block in Example 1;

[0021] Figure 5 This is a schematic diagram of the support block in Example 2.

[0022] In the diagram: 1. Threaded shaft, 2. Upper frustum, 3. Friction disc, 4. Support block, 41. V-shaped seat, 42. Rectangular friction plate, 43. Test piece, 44. Mounting plate one, 45. Arc-shaped friction plate, 46. U-shaped seat, 47. Mounting plate two, 5. Mounting hole, 6. Lower frustum, 7. Hydraulic rod, 8. Spring, 9. Nut, 10. Machining groove, 11. Vertical drilling machine bed, 12. Stepper motor. Detailed Implementation

[0023] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0024] In the description of this application, if directional descriptions are involved, such as "up," "down," "front," "back," "left," "right," etc., indicating directional or positional relationships, they are based on the appendix. Figure 3 The orientations or positional relationships shown are for the convenience of describing this application and simplifying the description only, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. When a feature is referred to as "set", "fixed", or "connected" to another feature, it can be directly set, fixed, or connected to the other feature, or it can be indirectly set, fixed, or connected to the other feature.

[0025] This application provides the following technical solution:

[0026] Example 1, please refer to Figure 1-4 A simple friction and wear testing machine based on a vertical drilling machine includes a vertical drilling machine bed 11, a hydraulic rod 7 is provided on the vertical drilling machine bed 11, a stepper motor 12 is installed at the telescopic end of the hydraulic rod 7, and a threaded shaft 1 is also included; the upper end of the threaded shaft 1 is connected to the output shaft of the stepper motor 12, and an upper truncated cone 2 is fixedly connected to the lower end of the outer side of the threaded shaft 1. The lower surface of the upper truncated cone 2 is provided with a cylindrical groove, and the threaded shaft 1 passes through a friction disk 3, which is located inside the cylindrical groove.

[0027] Specifically, the stepper motor 12 drives the threaded shaft 1 to rotate, thereby causing the upper truncated cone 2 fixed on it and the friction disk 3 installed in its cylindrical groove to rotate together; the hydraulic rod 7 can drive the entire rotating assembly to move up and down, so as to apply the required normal load to the test piece.

[0028] More specifically, the output shaft of the stepper motor 12 is connected to the upper end face of the threaded shaft 1 via a coupling, making full use of the sturdy bed of the vertical drilling machine as the basic frame and installation platform. The structure is stable and reliable, and the cost is low. The hydraulic rod 7 provides stable and controllable downward pressure, and the stepper motor 12 provides precise and controllable rotational motion and speed. The upper truncated cone 2 and its cylindrical groove provide installation and movement space for the friction disk 3.

[0029] It also includes a lower truncated cone 6, and at least one support block 4 is installed on the upper surface edge of the lower truncated cone 6. A test piece 43 is provided in the groove of the support block 4.

[0030] Specifically, the lower truncated cone 6 serves as a fixed platform, and the support block 4 is modularly designed to accommodate different types of friction pair components, facilitating replacement and conducting various forms of friction and wear tests; the test piece 43 is placed directly in the groove of the support block, making installation convenient.

[0031] The upper surface edge of the friction disk 3 is connected to the inner side of the cylindrical groove via a spring 8.

[0032] Specifically, the spring 8 provides a flexible connection, allowing the friction disc 3 to float up and down within a certain range and adaptively fine-tune its angle. This ensures a more uniform pressure distribution and a tighter fit when the friction disc 3 contacts the test piece 43 below, which is especially important for non-planar contact forms and improves the accuracy and stability of the test results.

[0033] More specifically, when the friction disc 3 contacts and is pressed against the test piece 43, the spring 8 is compressed, allowing the friction disc 3 to float up and down axially within the cylindrical groove, automatically adapting to the unevenness of the test piece 43 surface or the requirements of different contact forms, ensuring good contact.

[0034] Furthermore, the friction disc 3 is constrained to the threaded shaft 1 by a nut 9.

[0035] Specifically, the nut 9 fixing method is simple and reliable, facilitating the installation, disassembly, and replacement of the friction disc 3. It allows for easy replacement when testing friction discs of different materials or specifications.

[0036] Furthermore, the outer surface edge of the lower truncated cone 6 is provided with no less than two mounting holes 5, and bolts pass through the mounting holes 5 to fix the lower truncated cone 6 to the bed 11 of the vertical drilling machine.

[0037] Specifically, the mounting holes 5 and bolts provide a simple and secure fixing method, ensuring that the lower truncated cone 6 remains absolutely stationary during the test, providing a stable grinding platform for the friction pair; at the same time, installation and disassembly are convenient, facilitating the maintenance of the testing machine or platform adjustment.

[0038] Furthermore, a machining groove 10 is provided in the middle of the upper surface of the lower truncated cone 6.

[0039] Specifically, the main function of the machining groove 10 is to reduce the weight of the lower frustum 6 and reduce material costs. More importantly, it provides a space to avoid interference from protruding parts that may exist below when installing certain support blocks 4 or during debugging. At the same time, it can also serve as a temporary accumulation area for wear debris or lubricant generated during the test.

[0040] Furthermore, the spring 8 is positioned directly above the support block 4, and the number of springs 8 is the same as the number of support blocks 4.

[0041] Specifically, this corresponding arrangement ensures that the normal load borne by each support block 4 can be independently and evenly transmitted to the friction disk 3 through the spring 8 above it, avoiding the problem of excessive local stress or poor contact caused by uneven load distribution, and improving the uniformity and comparability of the test.

[0042] Furthermore, the diameter of the friction disc 3 is 0.5 mm larger than the diameter of the threaded shaft 1, so as to ensure that the friction disc 3 floats up and down under the action of the spring 8.

[0043] Specifically, the 0.5mm gap design is key. It ensures that while the friction disc 3 is roughly positioned and driven to rotate radially by the threaded shaft 1, it has enough free space to move axially (vertically) without being rigidly constrained by the threaded shaft 1, so that the floating function of the spring 8 can be truly realized.

[0044] Furthermore, the support block 4 includes a mounting plate 44, which is fixed to the lower truncated cone 6 by bolts. A V-shaped seat 41 is provided on the upper surface of the mounting plate 44, and a rectangular friction plate 42 is provided on the inner side of the V-shaped seat 41. The test piece 43 is provided on the inner side of the V-shaped seat 41.

[0045] Specifically, this type of support block enables the testing function of planar-cylindrical (line contact) friction pairs; the V-shaped seat 41 can stably clamp the cylindrical test piece 43, such as a pin or shaft; the rectangular friction plate 42 can be made of different materials as needed to simulate the actual grinding surface; the modular design facilitates the replacement of V-shaped seat assemblies with different angles or materials.

[0046] Example 2, please refer to Figure 5 The main difference between this embodiment and embodiment 1 is that this embodiment can realize the test function of cylindrical surface-cylindrical surface friction pair.

[0047] In this embodiment, the support block 4 includes a second mounting plate 47, which is fixed to the lower truncated cone 6 by bolts. A U-shaped seat 46 is provided on the upper surface of the second mounting plate 47, and an arc-shaped friction plate 45 is provided on the inner side of the U-shaped seat 46. The test piece 43 is provided on the inner side of the arc-shaped friction plate 45.

[0048] Specifically, the U-shaped seat 46 can accommodate and position test pieces 43 with arc surfaces, such as spheres or short cylinders; the arc-shaped friction pad 45 can be made of different materials as needed to simulate the actual grinding surface; the modular design facilitates the replacement of U-shaped seat components with different radii of curvature or materials.

[0049] It is worth noting that in both Embodiment 1 and Embodiment 2, the openings of the U-shaped seat 46 and the V-shaped seat 41 are oriented towards the threaded shaft 1.

[0050] The friction disc 3 and the threaded shaft 1 will not rotate relative to each other. In order to prevent the friction disc 3 from slipping in the circumferential direction, the friction disc 3 is fixed to the threaded shaft 1 by a keyway or spline.

[0051] The specific dimensions of the V-shaped seat 41 and the U-shaped seat 46 can be adjusted according to the size of the test piece.

[0052] The materials of the friction disc 3, the rectangular friction plate 42, and the arc-shaped friction plate 45 are determined by the test object 43.

[0053] In use: the output shaft of the stepper motor 12 rotates to transmit power to the threaded shaft 1. The threaded shaft 1, under the constraint of the nut 9, drives the friction disk 3 to rotate. The rotation of the friction disk 3 drives the test piece 43 to rotate and contact with the V-block assembly and the U-block assembly. At the same time, the spring 8 plays the role of stabilizing the load and reducing vibration, thereby completing the friction and wear test of line contact or surface contact.

[0054] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A simple friction and wear testing machine based on a vertical drilling machine, comprising a vertical drilling machine bed (11), a hydraulic rod (7) provided on the vertical drilling machine bed (11), and a stepper motor (12) installed at the telescopic end of the hydraulic rod (7), characterized in that: It also includes a threaded shaft (1); the upper end of the threaded shaft (1) is connected to the output shaft of the stepper motor (12), and an upper truncated cone (2) is fixedly connected to the lower end of the outer side of the threaded shaft (1). A cylindrical groove is provided on the lower surface of the upper truncated cone (2), and a friction disk (3) is installed on the outer side of the threaded shaft (1). The friction disk (3) is located inside the cylindrical groove. It also includes a lower truncated cone (6), and at least one support block (4) is installed on the upper surface edge of the lower truncated cone (6). A test piece (43) is provided in the groove of the support block (4). The upper surface edge of the friction disc (3) is connected to the inner side of the cylindrical groove by a spring (8).

2. The simplified friction and wear testing machine based on a vertical drilling machine according to claim 1, characterized in that: The friction disc (3) is constrained to the threaded shaft (1) by a nut (9).

3. The simplified friction and wear testing machine based on a vertical drilling machine according to claim 1, characterized in that: The lower truncated cone (6) has at least two mounting holes (5) on its outer surface edge. Bolts pass through the mounting holes (5) to fix the lower truncated cone (6) to the bed (11) of the vertical drilling machine.

4. A simplified friction and wear testing machine based on a vertical drilling machine according to claim 1, characterized in that: The lower truncated cone (6) has a machining groove (10) in the middle of its upper surface.

5. A simplified friction and wear testing machine based on a vertical drilling machine according to claim 1, characterized in that: The springs (8) are positioned directly above the support blocks (4), and the number of springs (8) is the same as the number of support blocks (4).

6. A simplified friction and wear testing machine based on a vertical drilling machine according to claim 1, characterized in that: The diameter of the friction disc (3) is 0.5 mm larger than the diameter of the threaded shaft (1) to ensure that the friction disc (3) floats up and down under the action of the spring (8).

7. A simplified friction and wear testing machine based on a vertical drilling machine according to claim 6, characterized in that: The support block (4) includes a mounting plate (44), which is fixed to the lower truncated cone (6) by bolts. A V-shaped seat (41) is provided on the upper surface of the mounting plate (44), and a rectangular friction plate (42) is provided on the inner side of the V-shaped seat (41). The test piece (43) is provided on the inner side of the V-shaped seat (41).

8. A simplified friction and wear testing machine based on a vertical drilling machine according to claim 6, characterized in that: The support block (4) includes a second mounting plate (47), which is fixed to the lower truncated cone (6) by bolts. A U-shaped seat (46) is provided on the upper surface of the second mounting plate (47), and an arc-shaped friction plate (45) is provided on the inner side of the U-shaped seat (46). The test piece (43) is provided on the inner side of the arc-shaped friction plate (45).

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