A multifunctional pin-on-disc wear simulation experimental device

Abstract

The present invention belongs to the technical field of friction and wear testing, and discloses a multifunctional pin-disc wear simulation experimental device. The device can carry out multiple groups of grinding experiments without affecting each other, and can also carry out multiple groups of grinding experiments simultaneously under different rotation speeds, contact pressures and the same temperature without affecting each other, which not only improves the reliability of experimental data and experimental efficiency, but also shortens the experimental time. Among them, the insulation box cavity allows the user to change the temperature inside the insulation box cavity; the screw slider lifting and loading system can independently start different grinding components and can apply vertical loads to different multi-grinding components respectively; the main shaft rotation system can drive the friction disk to rotate and provide corresponding torque.

Description

Technical Field

[0001] The invention belongs to the technical field of friction and wear testing, and particularly relates to a multifunctional pin-on-disc wear simulation experimental device. Background Art

[0002] The pin-on-disc friction and wear testing machines currently available on the market have the defect of being single in function. Pin-on-disc friction and wear testing machines of general structure can only carry out one set of grinding experiments at a time. However, a large number of experiments are often required to study the effects of temperature, rotation speed and pressure on the friction performance of the specimen. Such experimental devices have low experimental efficiency and take a lot of time.

[0003] Therefore, it is necessary to develop a device that can conduct multiple sets of wear tests simultaneously without affecting each other. This allows for repeated verification tests at the same temperature and speed, as well as comparative tests at different speeds at the same temperature. It also allows for comparative tests at different loads at the same temperature, and for different materials under the same environment. This can reduce experimental errors and better characterize the friction and wear properties of materials.

[0004] At the same time, the temperature chamber is designed to make the temperature of the experimental space adjustable, which can not only simulate high temperatures, but also conduct pin-disc friction and wear experiments in lower temperature environments. Summary of the Invention

[0005] The purpose of the present invention is to provide a multifunctional pin-on-disc wear simulation specimen device that can carry out multiple sets of grinding experiments simultaneously without affecting each other, and in which the rotation speed, contact pressure and working temperature can be adjusted, so as to better simulate the environmental conditions when parts rub against each other, improve the reliability of experimental data and experimental efficiency, and shorten the experimental time.

[0006] The technical solution adopted in the present invention is as follows:

[0007] A multifunctional pin-on-disc wear simulation experimental device comprises a frame, which is provided with a screw slider lifting and loading system, multiple grinding assemblies, a temperature chamber assembly, and a spindle rotation system in sequence from top to bottom, wherein the multiple grinding assemblies are arranged in the temperature chamber assembly.

[0008] The rack comprises a rack upper cover, a rack lower cover, rack pillars and a rack bottom plate which are sequentially arranged from top to bottom. A temperature chamber component is arranged between the rack upper cover and the rack lower cover.

[0009] A square hole is provided on the upper cover of the rack, a transparent cover is provided at the square hole, and a temperature sensor for real-time monitoring of the ambient temperature of the temperature chamber component is provided on the transparent cover.

[0010] The screw slider lifting and loading system includes multiple mounting bases evenly distributed on the upper cover of the frame, a slide is provided on the mounting base for sliding, a ball screw connected to the slide is fixed inside the mounting base, an anti-collision device is provided on the ball screw to prevent excessive movement of the slider, a three-dimensional force sensor and a loading device are provided on the slide in sequence, and a screw servo motor for driving the ball screw is provided on the upper cover of the frame.

[0011] The anti-collision device comprises an anti-collision block arranged on the mounting base plate, a ball screw is passed through the anti-collision block, and a rubber block is arranged on the side of the anti-collision block close to the screw.

[0012] The loading device includes a metal plate fixedly connected to the three-dimensional force sensor, a linear bearing fixedly provided on the metal plate, and an ER extension rod passing through the transparent cover and the upper cover of the frame in sequence is provided in the linear bearing, a positioning pin for positioning the ER extension rod is provided on the metal plate, a grinding assembly is provided at the downward extending end of the ER extension rod, and a loading spring is wound around the ER extension rod.

[0013] The grinding assembly includes a mold pin fixedly clamped on the ER extension rod by a locking nut and an ER spring collet, and a friction disc assembly and a spindle rotation system are arranged below.

[0014] The friction disc assembly comprises a tray with a placement groove, a detachably connected friction disc is arranged in the placement groove of the tray, and a main shaft rotation system is detachably connected in the tray.

[0015] The spindle rotation system includes multiple spindle servo motors evenly distributed on the frame base plate. The spindle servo motors are equipped with coupling 1, speed torque sensor, coupling 2, and spindle from bottom to top. The spindle is detachably connected to the tray.

[0016] The temperature chamber assembly includes a cavity upper cover, a cavity shell, and a cavity lower cover arranged in sequence from top to bottom. A copper tube is wrapped around the shell wall of the cavity shell, and the cavity upper cover, cavity shell, cavity lower cover, and copper tube constitute the insulation box cavity.

[0017] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0018] 1. In the present invention, the user can drive one or more of the multiple grinding assemblies separately through the spindle rotation system, and can also drive one or more of the multiple grinding assemblies downward through the screw slider lifting and loading system. The temperature can also be adjusted through the temperature chamber assembly. Therefore, the present invention can simultaneously carry out multiple groups of grinding experiments under different rotation speeds and contact pressures but the same temperature without affecting each other, thereby better simulating the environmental conditions when parts rub, improving the reliability of experimental data and experimental efficiency, and shortening the experimental time.

[0019] 2. The present invention can conduct repeated verification experiments at the same temperature and speed; it can also conduct comparative experiments at different speeds at the same temperature; it can also conduct experimental comparisons at different loading loads at the same temperature, thereby reducing experimental errors and better characterizing the friction and wear properties of the material.

[0020] 3. In the present invention, since the rotation speed, contact pressure and working temperature of multiple sets of grinding components can be adjusted, the environmental conditions when the parts rub against each other can be better simulated, the reliability of the experimental data and the experimental efficiency can be improved, and the experimental time can be shortened.

[0021] 4. In the present invention, the user can use the copper tube for heat conduction or heat convection to exchange heat with the gas in the cavity. The user can also input refrigerant into the copper tube to mix the hot air with the cold air, thereby achieving the purpose of maintaining the stability of the gas in the cavity.

[0022] 5. In the present invention, the anti-collision block can prevent the skateboard from excessively moving, and the rubber block on the anti-collision block can alleviate the impact of the skateboard on the anti-collision block when it reaches the upper and lower ends.

[0023] 6. In the present invention, the detachable friction disc is convenient for users to replace and install in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the present invention;

[0025] Figure 2 It is a schematic structural diagram of the loading device and friction disc of the present invention;

[0026] Figure 3 yes Figure 2 A simplified cross-sectional view of

[0027] Figure 4 yes Figure 3 A partial enlarged view of middle A;

[0028] Figure 5 It is a structural diagram of the spindle rotation system;

[0029] Figure 6 This is a schematic diagram of the connection between the ball screw and the mounting plate;

[0030] Figure 7 yes Figure 6 sectional view;

[0031] Figure 8 Schematic diagram of the structure of the insulation chamber assembly;

[0032] Figure 9 It is a structural diagram of the support body;

[0033] Figure 10 yes Figure 9 Left view of;

[0034] Figure 11 It is a structural diagram of the friction disc;

[0035] Figure 12 It is a schematic diagram of the connection between the upper cover plate of the rack and the transparent cover plate;

[0036] Figure 13 It is a structural diagram of the upper cover of the rack;

[0037] Markings in the figure: 1 rack cover, 11 transparent cover, 111 accommodating hole, 12 temperature sensor, 13 square hole, 2 mounting base, 21 slide plate, 22 ball screw, 23 anti-collision device, 231 anti-collision block, 232 rubber block, 24 three-dimensional force sensor, 25 loading device, 251 metal plate, 2511 positioning pin, 252 linear bearing, 253 ER extension rod, 254 loading spring, 26 bellows coupling, 27 screw servo motor, 28 guide rail, 29 guide rail slider, 3 rack lower cover, 4 temperature chamber assembly, 4 1 Cavity upper cover, 42 Cavity shell, 43 Cavity lower cover, 44 Copper tube, 5 Grinding assembly, 51 Locking nut, 52ER spring collet, 53 Mold pin, 54 Friction disc assembly, 541 Tray, 5411 Ring cover, 5412 Support body, 5413 Groove, 5414 Stop block, 5415 Placement groove, 5416 Thread groove, 542 Friction disc, 5421 Bayonet, 6 Frame pillar, 7 Spindle servo motor, 71 Coupling 1, 72 Speed ​​torque sensor, 73 Coupling 2, 74 Spindle, 8 Frame base plate. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0039] Example 1

[0040] A multifunctional pin-disc wear simulation experimental device includes a frame, which is equipped with a screw slider lifting and loading system, multiple grinding components 5, a temperature chamber component 4, and a spindle rotation system from top to bottom. The multiple grinding components 5 are arranged in the temperature chamber component 4.

[0041] The rack includes a rack upper cover plate 1, a rack lower cover plate 3, a rack support 6, and a rack bottom plate 8 which are sequentially arranged from top to bottom. A temperature chamber component 4 is provided between the rack upper cover plate 1 and the rack lower cover plate 3.

[0042] A square hole 13 is provided on the upper cover plate 1 of the rack, a transparent cover plate 11 is provided at the square hole 13 , and a temperature sensor 12 for real-time monitoring of the ambient temperature of the temperature chamber assembly 4 is provided on the transparent cover plate 11 .

[0043] The screw slider lifting and loading system includes multiple mounting bases 2 evenly distributed on the upper cover plate 1 of the frame, a slide plate 21 is slidingly provided on the mounting base plate 2, a ball screw 22 connected to the slide plate 21 is fixed inside the mounting base plate 2, and an anti-collision device 23 is passed through the ball screw 22 to prevent excessive movement of the slider, a three-dimensional force sensor 24 and a loading device 25 are sequentially provided on the slide plate 21, a screw servo motor 27 for driving the ball screw 22 is provided on the upper cover plate 1 of the frame, guide rails 28 are provided on both sides of the mounting base plate 2, and guide rail sliders 29 and slide plates 21 are sequentially provided on the guide rails 28, the slide plates 21 are fixedly connected to the guide rail sliders 29 by bolts, the slide plates 21 are interference fit with the screw nut on the ball screw 22, and the ball screw 22 is connected to the screw servo motor 27 through a bellows coupling 26.

[0044] The anti-collision device 23 includes an anti-collision block 231 provided on the mounting base 2, a ball screw 22 is passed through the anti-collision block 231, and a rubber block 232 is provided on the side of the anti-collision block 231 close to the screw;

[0045] The loading device 25 includes a metal plate 251 fixedly connected to the three-dimensional force sensor 24, a linear bearing 252 is fixedly provided on the metal plate 251, and an ER extension rod 253 is provided in the linear bearing 252, which passes through the transparent cover 11 and the upper cover 1 of the frame in sequence. A positioning pin 2511 is provided on the metal plate 251 for positioning the ER extension rod 253, and a grinding assembly 5 is provided at the downward extending end of the ER extension rod 253, and a loading spring 254 is wound around the ER extension rod 253. The linear bearing 252 can limit the four degrees of freedom of the ER extension rod 253; a receiving hole 111 is provided on the transparent cover 11, and the ER extension rod 253 can be extended and retracted in the receiving hole 111.

[0046] The grinding assembly 5 includes a mold pin 53 fixedly clamped on the ER extension rod 253 by a locking nut 51 and an ER spring collet 52, and a friction disc assembly 54 and a spindle rotation system are sequentially arranged below.

[0047] The friction disc assembly 54 includes a tray 541 with a placement groove 5415, a detachably connected friction disc 542 is provided in the placement groove 5415 of the tray 541, and a spindle rotation system is detachably connected to the tray 541. The tray 541 includes, from top to bottom, an annular cover plate 5411 and a support body 5412. The support body 5412 is provided with a groove 5413 and a stop block 5414. The friction disc 542 is provided with a bayonet 5421. The friction disc 542 is engaged with the stop block 5414 through the bayonet 5421, thereby fixing it in the support body 5412. The plate 5411 and the support body 5412 are fastened by screws, thereby clamping the friction disc 542 to prevent it from moving up and down, and the stop block 5414 on the support body 5412 is clearance-matched with the bayonet 5421 on the friction disc 542 to prevent the friction disc 542 from rotating during the test. The groove 5413 on the support body 5412 facilitates the installation and disassembly of the friction disc 542, and the stop block 5414 can prevent the friction disc 542 from sliding or rotating. The tray 541 is a stepped cylindrical whole, and the lower end inner cavity has a threaded groove 5416 for easy threaded connection with the main shaft 74.

[0048] The spindle rotation system includes multiple spindle servo motors 7 evenly distributed on the frame base plate 8. The spindle servo motor 7 is provided with a coupling 1 71, a speed torque sensor 72, a coupling 2 73, and a spindle 74 from bottom to top. The spindle 74 is detachably connected to the tray 541. Since the other end of the speed torque sensor 72 is connected to the spindle 74 through the coupling 2 73, and the spindle 74 is threadedly connected to the tray 541, the spindle servo motor 7 can drive the friction disk 542 to rotate and provide corresponding torque.

[0049] The temperature chamber assembly 4 includes a cavity upper cover plate 41, a cavity outer shell 42, and a cavity lower cover plate 43 arranged in sequence from top to bottom. A copper tube 44 is wrapped around the shell wall of the cavity outer shell 42, and the cavity upper cover plate 41, the cavity outer shell 42, the cavity lower cover plate 43, and the copper tube 44 constitute an insulation box cavity; specifically, the temperature chamber assembly 4 is made of aluminum alloy; specifically, the user can adjust the temperature through an external heating and cooling cycle integrated machine and then pump the circulating liquid into the copper tube 44 for circulation, so as to achieve the purpose of controlling the air temperature in the space test space through heat exchange and heat convection.

[0050] This embodiment can carry out multiple groups of grinding experiments without affecting each other, and can also carry out multiple groups of grinding experiments simultaneously under different rotation speeds, contact pressures and the same temperature without affecting each other, which not only improves the reliability of experimental data and experimental efficiency, but also shortens the experimental time.

[0051] Among them, there are multiple groups of experimental devices and they are the same, so the following is one of the experimental conditions. With the help of external equipment to heat the refrigeration cycle all-in-one machine, the circulating liquid is transported to the copper tube 44 wrapped around the wall shell. When the temperature sensor 12 shows that the temperature of the insulation box cavity has reached the set simulation temperature, the spindle servo motor 7 is started to drive the friction disk 542 to rotate, and then the screw servo motor 27 drives the ball screw. Because the slide plate 21 and the screw nut on the ball screw 22 are interference-connected, and the slide plate 21 can slide in the installation base plate 2, it can be achieved that when the screw servo motor 27 drives the rotation of the ball screw 22, the screw nut can drive the slide plate 21 to move downward in a straight line, and pass through the placement groove 5415 on the transparent cover plate 11 and the square hole 13 on the upper cover plate of the machine cover to move into the insulation box cavity, so that the mold pin 53 contacts the friction disk 542. When the slide 21 continues to descend, the linear bearing 252 slides down with the slide 21, thereby compressing the loading spring 254 to apply a vertical load. At this time, the magnitude of the loading force can be detected by the three-dimensional force sensor 24. When the required loading force is reached, the screw servo motor 27 stops rotating, and the slide 21 stops descending to maintain the experimental state. After the experiment is completed, the screw servo motor 27 reverses, and the ER extension rod 253 drives the mold pin 53 to move upward through the placement slot 5415 to leave the insulation box cavity to above the transparent plate. The positioning pin 2511 can position the ER extension rod 253 to prevent the ER extension rod 253 from excessive movement. Specifically, the spindle servo motor 7 automatically stops according to the set rotation time.

[0052] Since the screw slider lifting and loading system can independently start different grinding components 5 and can apply vertical loads to different multi-grinding components, this embodiment can perform multiple groups of multi-grinding experiments under the same temperature and different rotation speeds and contact pressures without affecting each other.

[0053] Specifically, when the user needs to replace the friction disc 542, the screw servo motor 27 can be reversed to allow the ER extension rod 253 to drive the mold pin 53 upward through the placement slot 5415 to leave the insulation box cavity to above the transparent plate, and then the transparent plate can be disassembled for replacement.

[0054] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A multifunctional pin-on-disc wear simulation experimental device, comprising a frame, characterized in that: The frame is provided with a screw slider lifting and loading system, a plurality of grinding assemblies (5), a temperature chamber assembly (4), and a spindle rotation system in sequence from top to bottom, and the plurality of grinding assemblies (5) are arranged in the temperature chamber assembly (4); The friction disc assembly (54) in the grinding assembly (5) comprises a tray (541) provided with a placement groove (5415), a detachably connected friction disc (542) is provided in the placement groove (5415) of the tray (541), and a main shaft rotation system is detachably connected in the tray (541); The tray (541) comprises, from top to bottom, an annular cover plate (5411) and a tray body (5412). The tray body (5412) is provided with a groove (5413) and a stop block (5414). The friction disc (542) is provided with a bayonet (5421). The friction disc (542) is engaged with the stop block (5414) through the bayonet (5421) and is fixed in the tray body (5412). The annular cover plate (5411) and the tray body (5412) are fastened by screws to clamp the friction disc (542). The stop block (5414) on the tray body (5412) and the bayonet (5421) on the friction disc (542) are clearance-matched. The tray (541) is in a stepped cylindrical shape as a whole, and a threaded groove (5416) is provided in the inner cavity of the lower end. The rack comprises a rack upper cover plate (1), a rack lower cover plate (3), a rack support (6), and a rack bottom plate (8) which are arranged in sequence from top to bottom, and a temperature chamber component (4) is provided between the rack upper cover plate (1) and the rack lower cover plate (3); The upper cover plate (1) of the frame is provided with a square hole (13), a transparent cover plate (11) is provided at the square hole (13), and a temperature sensor (12) for real-time monitoring of the ambient temperature of the temperature chamber assembly (4) is provided on the transparent cover plate (11); The screw slider lifting and loading system comprises a plurality of mounting base plates (2) uniformly distributed on a frame upper cover plate (1); a slide plate (21) is slidably provided on the mounting base plate (2); a ball screw (22) connected to the slide plate (21) is fixedly provided inside the mounting base plate (2); an anti-collision device (23) for preventing the slider from excessively moving is passed through the ball screw (22); a three-dimensional force sensor (24) and a loading device (25) are sequentially provided on the slide plate (21); and a screw servo motor (27) for driving the ball screw (22) is provided on the frame upper cover plate (1); The anti-collision device (23) comprises an anti-collision block (231) provided on the mounting base plate (2), a ball screw (22) passing through the anti-collision block (231), and a rubber block (232) provided on a side of the anti-collision block (231) close to the screw; The loading device (25) includes a metal plate (251) fixedly connected to the three-dimensional force sensor (24), a linear bearing (252) fixedly provided on the metal plate (251), and an ER extension rod (253) passing through the transparent cover plate (11) and the upper cover plate (1) of the frame is provided in the linear bearing (252), a positioning pin (2511) for positioning the ER extension rod (253) is provided on the metal plate (251), a grinding assembly (5) is provided at one end of the ER extension rod (253) extending downward, and a loading spring (254) is wound around the ER extension rod (253); a receiving hole (111) is provided on the transparent cover plate (11), and the ER extension rod (111) can be extended and retracted in the receiving hole (111); The grinding assembly (5) includes a mold pin (53) fixedly clamped on an ER extension rod (253) by a locking nut (51) and an ER spring collet (52), and a friction disc assembly (54) and a spindle rotation system are sequentially arranged below; The spindle rotation system includes a plurality of spindle servo motors (7) evenly distributed on a frame bottom plate (8), wherein the spindle servo motors (7) are provided with a coupling 1 (71), a speed torque sensor (72), a coupling 2 (73), and a spindle (74) in order from bottom to top, and the spindle (74) is detachably connected to the tray (541); The temperature chamber assembly (4) comprises a cavity upper cover plate (41), a cavity outer shell (42), and a cavity lower cover plate (43) which are arranged in sequence from top to bottom; a copper tube (44) is wound around the shell wall of the cavity outer shell (42); and the cavity upper cover plate (41), the cavity outer shell (42), the cavity lower cover plate (43), and the copper tube (44) constitute a heat preservation box cavity.

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