CN104406873B - Shaft element coating friction wear testing machine - Google Patents

Abstract

The coating friction and wear testing machine for shaft parts of the present invention includes a mounting bracket, a motor, a lever load testing device, an information collection and processing module, a computer and a power switch, wherein the lever load testing device includes a loading lever, a friction contact piece, Leveling unit, loading unit and friction sensing unit. After the sample is installed on the output shaft of the motor, the left and right positions of the loading lever can be adjusted so that the friction contact part is close to the test position of the sample, and then the horizontal balance of the loading lever can be adjusted by using the leveling unit, and by adjusting The upper and lower positions of the friction contact make it just in contact with the sample, then adjust the friction sensing unit so that it is close to the friction contact and close to the loading lever, then apply the load with the loading unit and make the load vertical through the friction contact Act on the sample; after that, the friction data can be collected and analyzed by using the friction sensing unit, information collection and processing module and computer.

Description

Shaft parts coating friction and wear testing machine

technical field

The invention relates to the technical field of coating friction and wear performance testing, in particular to a coating friction and wear testing machine for shaft parts.

Background technique

Shafts are common and typical components that are widely used in various mechanical devices. Shaft parts generally have different degrees of friction with their supporting parts during use. Therefore, in order to improve the service life of shaft parts, surface treatment is generally required to improve their wear resistance. At present, surface coating technology is a commonly used surface treatment method. Generally, a layer of wear-resistant coating with high hardness is deposited on the surface of parts by technical means such as electroplating, spraying, physical vapor deposition (PVD) and chemical vapor deposition (CVD). Layers, such as Cr, CrN, TiN, diamond film and diamond-like film (DLC), etc. The pros and cons of the wear resistance of these coatings are mainly evaluated through the test of their friction and wear properties; among them, the friction coefficient and wear rate are the most important indicators of the wear resistance of the two phases of the coating, which can generally be tested by a friction and wear testing machine get.

At present, according to the geometric shape and friction mode of the friction pair, it can be mainly divided into ball (pin) disc type, ball (pin) plate type, pin ring type, ring block type, ring ring type, etc. "Development and application of pin-ring friction and wear testing machine" (Gao Caiqiao, Liu Xinming. Development and application of pin-ring friction and wear testing machine. Solid Lubrication. 1982 (01): 49-53) introduces a pin Ring friction and wear testing machine, the technical proposal is: install the test ring with an outer diameter of 32mm, an inner diameter of 16mm, and a thickness of 10mm on the working shaft through the fixture, and the working shaft is installed on the motor through a pair of couplings; the pin is 20× A rectangular block of 10×4mm ³ , the pin is installed in the left part of the middle of the loading lever through a clamp, the left end of the loading lever is hinged, and the loading lever can rotate freely around the left end point. When working, the pin applies a positive load P to the test ring through the loading lever, and the test ring rotates with the motor through the working shaft, coupling and other components, and there is relative friction between the pin and the test ring, and the friction force is F; between a pair of couplings A friction torque sensor is installed between them, which can measure the friction torque M _f , M _f =F (D/2) = (FD)/2 (D is the outer diameter of the test ring), then there is a friction formula F=μ·P The calculated friction coefficient is μ=(2M _f )/(PD).

Although the pin-ring friction and wear testing machine can perform friction and wear tests on cylindrical surfaces, the sample must be a ring-shaped sample with a small length-to-diameter ratio and a hole in the middle, which is not suitable for friction and wear of shaft samples with a large length-to-diameter ratio. test; and the pin-ring type uses a pin for the grinding pair, and the contact method is surface contact. In actual operation, a slight deviation in the installation angle of the pin and the test ring will lead to a change in the contact area; in addition, the friction generated during the friction process Wear debris or added friction medium will affect the contact area, and the change of the contact area will cause the fluctuation of the friction force, and the friction coefficient will also be affected accordingly. Therefore, the use of this surface contact method will lead to reliable test results. Poor performance and repeatability.

Therefore, it is necessary to provide a technical means to solve the above defects.

Contents of the invention

The purpose of the present invention is to overcome the defects of the prior art, and the shaft parts coating friction and wear testing machine provided can only solve the problem that the shaft parts coating friction and wear testing machine of the prior art can only be used for the long diameter of the sample. The test of the ring-shaped sample with a small ratio and a hole in the middle cannot test the shaft sample with a large length-to-diameter ratio, and solve the problem that the coating friction and wear tester for shaft parts in the prior art uses surface contact. Testing in a different way leads to poor reliability and repeatability of the test results.

The present invention is achieved in this way, the coating friction and wear testing machine for shaft parts, comprising:

Mounting brackets for component mounting settings;

A motor used to connect and fix shaft parts and drive the shaft parts to rotate, the motor is horizontally arranged on the mounting bracket, the output shaft of the motor is connected to the shaft parts, and the motor The axis of the output shaft coincides with the axis of the shaft parts;

A lever load test device for testing the wear resistance of the coating on the outer surface of the shaft parts, the lever load test device includes a loading lever, a friction contact piece that is in frictional contact with the shaft parts, and A leveling unit for adjusting the horizontal balance of the loading lever, a loading unit for applying load to the shaft parts, and a device for sensing the friction condition between the friction contact piece and the shaft parts The friction sensing unit, the loading lever is freely rotatable and set on the installation bracket, the friction contact piece is set on the first end of the loading lever, and the leveling unit is set on the second end of the loading lever On the second end of one end, the loading unit is arranged on the upper end of the friction contact member, and the friction sensing unit is installed on the mounting bracket;

An information collection and processing module for receiving information about the friction condition between the friction contact piece and the shaft component transmitted by the friction sensing unit and performing A/D conversion processing on the information, the information The collection and processing module is installed on the mounting bracket, and the information collection and processing module is electrically connected to the friction sensing unit;

A computer for receiving digital information transmitted by the information collection and processing module and analyzing and processing the digital information, the computer is electrically connected to the information collection and processing module; and

A power switch used to control the motor, the friction sensing unit, the information collection and processing module and the computer switch, the power switch is arranged on the mounting bracket, and the power switch is respectively connected to the The motor, the friction sensing unit, the information collection and processing module are electrically connected to the computer.

Specifically, the lever load testing device also includes a lever connection seat for connecting and fixing the loading lever and making the loading lever movable, and the lever connection seat includes:

a lower slider arranged on the mounting bracket;

sliding an upper slider arranged on the lower slider and cooperating with the lower slider;

a sliding restriction member interposed between the upper slider and the lower slider to restrict relative sliding between the upper slider and the lower slider; and

Vertically rotate the lever support on the upper slider;

Wherein, the loading lever passes through the lever support and is hinged on the lever support.

Further, the lower end of the upper slider is provided with a sliding protrusion, the upper end of the lower slider is provided with a sliding groove capable of accommodating the sliding protrusion, and the sliding protrusion is provided with a first sliding member , the sliding groove is provided with a second sliding piece corresponding to the first sliding piece, and the upper sliding piece is slid on the upper sliding piece through the cooperation of the first sliding piece and the second sliding piece. on the slider below.

Furthermore, the first sliding member is a rack provided on the end surface of the sliding protrusion facing the sliding groove, and the rack extends along the sliding direction of the sliding protrusion and Located on the end surface of the sliding protrusion facing the sliding groove, the second sliding member is a gear shaft correspondingly meshing with the rack.

Specifically, the upper end of the upper slider is provided with a support installation groove, and the lower end of the lever support is sleeved with at least one first bearing, and the lever support is connected to the support through each of the first bearings. The installation groove is interference-fitted and vertically rotatable and arranged on the upper slide block.

Specifically, the upper end of the lever support is provided with an installation opening, and the loading lever is provided with a rotationally arranged rotating pin, and the loading lever is hinged to the installation opening through the rotating pin. on the lever support.

Further, the loading lever is provided with a pin shaft installation hole, and the rotation pin sleeve is provided with at least one second bearing, and the rotation pin shaft is interference fit with the pin shaft installation hole through each of the second bearings And the rotation is located on the said loading lever.

Specifically, the friction sensing unit includes:

An induction mounting plate, the induction mounting plate is arranged on the mounting bracket;

A friction sensor, the friction sensor is arranged on the induction mounting plate through a cantilever and faces the friction contact piece, the first end of the cantilever moves and is arranged on the induction mounting plate, relative to the cantilever the second end of the first end is connected to the friction sensor; and

The sensor movement limiting part is passed through the induction mounting plate and can move and contact the cantilever.

Specifically, the friction contact member includes a vertical rod, a grinding ball used to contact the shaft parts, and a grinding ball chuck used to clamp the grinding ball, and the grinding ball chuck is sleeved on the The lower end of the vertical rod is clamped by the grinding ball, and the grinding ball part is exposed at the lower end of the grinding ball chuck;

The first end of the loading lever is provided with a mounting sleeve, and the mounting sleeve is sleeved on the vertical rod.

Specifically, the leveling unit includes a counterweight socketed on the second end of the loading lever;

The loading unit includes a tray, a loading weight, and a weight fixing member. The tray is movable and sleeved on the upper end of the friction contact, and the loading weight is sleeved on the friction contact and pressed against the tray. Above, the weight fixing part is connected with the friction contact part and moves to press against the upper surface of the loading weight.

The technical effect of the shaft parts coating friction and wear testing machine of the present invention is: when the test is to be carried out, the shaft parts are first installed on the output shaft of the motor, and the axis of the output shaft of the motor is guaranteed to be zero to the shaft. The axes of the components are coincident; then, by adjusting the left and right positions of the loading lever, the friction contact is close to the test position of the shaft parts, and then the leveling unit is used to adjust the horizontal balance of the loading lever, and by adjusting the up and down of the friction contact Position it just in contact with the shaft parts, then adjust the friction sensing unit so that it is close to the friction contact, and just close to the loading lever, then apply the load with the loading unit, and apply the load vertically to the shaft through the friction contact On the shaft parts; after finishing, you can start the power switch, set the relevant test parameters of the shaft parts on the computer, after that, you can start the motor, and the output shaft of the motor will rotate and drive the shaft parts Rotate together, when the friction contact piece is in friction contact with the output shaft of the motor, the friction sensing unit will sense the relevant friction situation and send the corresponding information to the information collection and processing module, which will process the information Send it to the computer, and then the computer analyzes and processes the information. The whole operation process is simple and convenient, and the shaft samples with relatively large length and diameter can be tested by adjusting the components of the lever load test device. At the same time, using the point contact method between the friction contact piece and the shaft parts, Effectively guarantee the reliability and repeatability of test results.

Description of drawings

Fig. 1 is the three-dimensional view of the coating friction and wear testing machine of shaft parts and components according to the embodiment of the present invention;

Fig. 2 is the schematic diagram of the lever connecting seat of the coating friction and wear testing machine for shaft parts of the embodiment of the present invention;

Fig. 3 is a sectional view of A-A direction in Fig. 2;

Fig. 4 is a schematic structural view of the lever support of the shaft parts coating friction and wear testing machine according to the embodiment of the present invention;

Fig. 5 is a schematic diagram of the friction contact piece of the shaft parts coating friction and wear testing machine in the embodiment of the present invention contacting the shaft parts;

Fig. 6 is a schematic structural view of the friction contact part of the coating friction and wear testing machine for shaft parts according to the embodiment of the present invention;

Fig. 7 is a schematic structural diagram of the friction sensing unit of the coating friction and wear testing machine for shaft parts according to the embodiment of the present invention.

detailed description

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

Referring to Fig. 1 to Fig. 7, the best embodiment of the coating friction and wear testing machine for shaft parts of the present invention will be described below.

The shaft parts coating friction and wear testing machine 100 of the present embodiment includes a mounting bracket 10, a motor 20, a lever load testing device 30, an information collection and processing module 40, a computer (not shown), a power switch 50 and a servo Motor driver 60, each component of this shaft parts coating friction and wear testing machine 100 is further described below:

The mounting bracket 10 is mainly used for installing parts;

The motor 20 is used to connect and fix the shaft parts and drive the shaft parts to rotate, wherein the motor 20 is horizontally arranged on the mounting bracket 10, the output shaft of the motor 20 is connected to the shaft parts P, and the motor 20 The axis of the output shaft coincides with the axis of the shaft parts to ensure that the shaft parts and the output shaft of the motor 20 rotate around the same axis. In order to avoid eccentric rotation, preferably, the motor 20 is a servo motor. Equipped with a servo motor driver 60 located on the mounting bracket 10; in addition, the output shaft of the motor 20 is connected to the shaft part P through a sample holder sleeve 21, and the first end of the sample holder sleeve 21 is sleeved on the shaft Part P, the second end of the first end of the sample holder sleeve 21 is sleeved on the output shaft of the motor 20;

The lever load testing device 30 is used to test the wear resistance of the coating on the outer surface of the shaft parts P. 32, a leveling unit 33 for adjusting the horizontal balance of the loading lever 31, a loading unit 34 for applying a load through the friction contact 32, and a friction condition between the friction contact 32 and the shaft parts P for sensing The friction sensing unit 35, the loading lever 31 is free to rotate and is arranged on the mounting bracket 10, the friction contact member 32 is arranged on the first end of the loading lever 31, and the leveling unit 33 is arranged on the first end relative to the first end of the loading lever 31. On the two ends, the loading unit 34 is arranged on the upper end of the friction contact member 32, and the friction sensing unit 35 is installed on the mounting bracket 10;

The information collection and processing module 40 is used to receive the information about the friction condition between the friction contact piece and the shaft component P transmitted by the friction sensing unit 35 and perform A/D conversion processing on the information, wherein the information collection and the processing module 40 is installed on the mounting bracket 10, and the information collection and processing module 40 is electrically connected to the friction sensing unit 35;

The computer is used to receive the digital information transmitted by the information collection and processing module 40 and analyze and process the digital information, and the computer is electrically connected to the information collection and processing module 40;

The power switch 50 is a switch for controlling the motor 20, the friction induction unit 35, the information collection and processing module 40 and the computer. The information collection and processing module 40 is electrically connected to the computer.

When testing, the shaft parts P are first installed on the output shaft of the motor 20, and ensure that the axis of the output shaft of the motor 20 coincides with the axis of the shaft parts P; then, by adjusting the left and right sides of the loading lever 31 position, so that the friction contact piece 32 is close to the test position of the shaft parts P, and then use the leveling unit 33 to adjust the horizontal balance of the loading lever 31, and adjust the up and down position of the friction contact piece 32 to make it just in line with the shaft zero. Part P contacts, then adjust the friction induction unit 35 so that it is close to the friction contact piece 32, and just cling to the bushing 314 provided at the first end of the loading lever, and then, use the loading unit 34 to apply a load, and pass through the friction contact piece 32. Apply the load vertically to the shaft part P; after the completion, the power switch 50 can be turned on, and the relevant test parameters of the shaft part P are set on the computer, such as the rotating speed, diameter and test time of the shaft part P , and the quality of the loading unit 34, after that, the motor 20 can be started, and the output shaft of the motor 20 will rotate and work, and drive the shaft parts P to rotate together. When the friction contact member 32 is in frictional contact with the output shaft of the motor 20 , the friction sensing unit 35 will sense its relevant friction conditions and send the corresponding information to the information collection and processing module 40, the information collection and processing module 40 will send it to the computer after processing the information, and then the computer will send the information to the Through analysis and processing, the real-time data of the friction force and friction coefficient of the coating of the shaft parts P are obtained, and at the same time, the computer draws the change curve of the friction force and friction coefficient with time. The whole operation process is simple and convenient, and the shaft samples with relatively large length and diameter can be tested by adjusting the components of the lever load testing device 30. The contact method effectively guarantees the reliability and repeatability of the test results.

Please refer to Fig. 2 and Fig. 3, and in conjunction with Fig. 1, the lever load test device 30 of the present embodiment also includes the lever connecting seat 36 for connecting and fixing the loading lever 31 and making the loading lever 31 movable. Including lower slider 361, upper slider 362, sliding limiter 363 and lever support 364, and the specific structure of each part of lever connecting seat 36 is:

The lower slider 361 is located on the mounting bracket 10;

The upper slider 362 is slidably arranged on the lower slider 361 and cooperates with the lower slider 361;

The sliding limiter 363 is inserted between the upper slider 362 and the lower slider 361, and it is used to limit the relative sliding between the upper slider 362 and the lower slider 361. Preferably, in order to facilitate material acquisition and installation, The sliding limiting member 363 is a positioning bolt;

The lever support 364 is vertically rotatably arranged on the upper slider 362 , wherein the loading lever 31 passes through the lever support 364 and is hinged on the lever support 364 .

Thus, when it is necessary to move the loading lever 31 to adjust the setting position between the friction contact member 32 and the shaft part P, the relative sliding between the lower slider 361 and the upper slider 362 can first be used to adjust the loading lever. The left and right positions of 31; then, the front and rear positions of the loading lever 31 can be adjusted through the rotation of the lever support 364; and then, the up and down positions can be adjusted by the up and down movement of the friction contact part 32, and thereby, The frictional contact piece 32 provided on the loading lever 31 can be adjusted in all directions to effectively ensure the frictional contact between the frictional contact piece 32 and the shaft component P.

In order to facilitate the user to control the relative sliding between the lower slider 361 and the upper slider 362, the lower end of the upper slider 362 is provided with a sliding protrusion 3621, and the upper end of the lower slider 361 is provided with a sliding concave that can accommodate the sliding protrusion 3621. The groove 3611, the sliding protrusion 3621 is provided with a first sliding piece 3622, the sliding groove 3611 is provided with a second sliding piece 3612 corresponding to the first sliding piece 3622, and the upper sliding block 362 is connected to the second sliding piece 3622 through the first sliding piece 3622. The two sliding parts 3612 cooperate to slide on the lower slider 361 . Preferably, the first sliding member 3622 is a rack disposed on the end surface of the sliding protrusion 3621 and facing the sliding groove 3611, wherein the rack is a straight rack, and the rack slides along the sliding protrusion 3621 The direction is extended and located on the end surface of the sliding protrusion 3621 facing the sliding groove 3611, and the second sliding member 3612 is a gear shaft correspondingly meshed with the rack, when the relative movement between the lower slider 361 and the upper slider 362 When sliding, as long as the engagement between the gear shaft and the rack is used, the desired purpose can be achieved. At the same time, the rack and the gear shaft are more convenient to obtain materials, and can better stabilize the gap between the lower slider 361 and the upper slider 362. slide. In addition, the sliding protrusion 3621 is a trapezoidal protrusion, and the sliding groove 3611 is a trapezoidal groove corresponding to the trapezoidal protrusion.

Please refer to Fig. 3 and Fig. 4, preferably, the rotation structure of the lever support 364 in this embodiment is as follows: the upper end of the upper slider 362 is provided with a support mounting groove 3623, and the lower end of the lever support 364 is provided with at least one first One bearing 3641, the lever support member 364 is vertically rotated on the upper slider 362 through the interference fit between each first bearing 3641 and the support member installation groove 3623, and the lever support member 364 is vertically rotated through the first bearing 3641, which is not only simple It is effective and easy to install. At the same time, in order to facilitate the acquisition of materials, the first bearing 3641 is a rolling bearing, and there are two rolling bearings. Of course, other types of bearings can also be used.

Please refer to Fig. 2 and Fig. 4, and the rotating structure of loading lever 31 of the present embodiment is: the upper end of lever support member 364 is provided with installation opening 3642, and loading lever 31 is provided with a rotating pin shaft 311 that rotates, and loading lever 31 The pivot pin 311 is disposed on the installation opening 3642 and hinged on the lever support 364 . Wherein, the loading lever 31 is provided with a pin shaft mounting hole 312, and the rotating pin shaft 311 is provided with at least one second bearing 313, and the rotating pin shaft 311 rotates through the interference fit between each second bearing 313 and the pin shaft mounting hole 312. On the loading lever 31, the second bearing 313 is used to rotate the pin shaft 311, which is not only simple and effective, but also easy to install. , Of course, other types of bearings can also be used.

Referring to Fig. 7, the friction sensing unit 35 of this embodiment includes a sensing mounting plate 351, a friction sensor 352 and a sensor movement limiting member 353, and the specific structure of each component of the friction sensing unit 35 is as follows:

The induction mounting plate 351 is located on the mounting bracket 10;

The friction sensor 352 is arranged on the inductive mounting plate 351 through a cantilever 354 and faces the friction contact member 32. The first end of the cantilever 354 is moved on the inductive mounting plate 351, and is connected to the second end of the first end of the cantilever 354. on the friction sensor 352;

The sensor movement limiting member 353 is installed on the induction mounting plate 351 and can move to contact the cantilever 354. Preferably, the sensor movement limiting member 353 is a positioning bolt, so as to facilitate material acquisition and reduce production costs. At the same time, the positioning bolt has Two are respectively arranged on both sides of the induction mounting plate 351, so as to facilitate better screwing into the cantilever 354 to locate the required position, and then ensure the positioning and setting of the friction sensor 352.

When the friction sensing unit 35 is to be brought close to the friction contact member 32, first the sensor movement limiting member 353 is moved away from the cantilever 354, so that the cantilever 354 can move back and forth, and then by adjusting the cantilever 354, to adjust the friction on the cantilever 354 After the distance between the sensor 352 and the friction contact member 32 is adjusted, the sensor movement limiting member 353 can be moved to contact the cantilever 354 to fix the cantilever 354 , thereby completing the adjustment operation.

Referring to Fig. 5 and Fig. 6, the frictional contact member 32 of this embodiment includes a vertical rod 321, a grinding ball 322 for contacting with the shaft parts P and a grinding ball chuck 323 for clamping the grinding ball 322, the grinding The ball chuck 323 is sleeved on the lower end of the vertical rod 321 and clamped on the grinding ball 322. The grinding ball 322 is partly exposed from the lower end of the grinding ball chuck 323. Then, if the friction contact piece is in contact with the shaft component P, As long as the vertical rod 321 is perpendicular to the shaft part P, and the grinding ball 322 is tangent to the shaft part P; the first end of the loading lever 31 is provided with a mounting sleeve 314, and the mounting sleeve 314 is sleeved on the vertical rod 321, specifically, the outer side of the vertical rod 321 is provided with an external thread, and the end wall of the hollow cavity where the installation sleeve 314 and the vertical rod 321 are socketed is provided with an internal thread that is threadedly connected with the external thread, thus, it can be conveniently The user can adjust the vertical distance of the pole 321 and also fix the position of the pole 321 .

Referring to Fig. 1, the leveling unit 33 of this embodiment includes a counterweight 330 sleeved on the second end of the loading lever 31, specifically, the second end of the loading lever 31 is provided with an external thread, and the counterweight The end wall of the hollow hole where 330 is socketed with the second end of the loading lever 31 is provided with an internal thread that is threadedly connected with the external thread, thus, it is convenient for the user to adjust the left and right distance of the counterweight 330 and fix the counterweight The position of the block 330; Simultaneously, in order to better adjust the horizontal balance of the loading lever 31, there are two counterweight blocks 330, and the two counterweight blocks 330 are different in size and quality.

Please refer to FIG. 6, and in conjunction with FIG. 1, the loading unit 34 includes a tray 341, a loading weight 342 and a weight fixing member 343, and the specific structure of each component of the loading unit 34 is as follows:

The tray 341 is moved and socketed on the upper end of the friction contact member 32, specifically, the tray 341 is moved and socketed on the upper end of the vertical rod 321 of the friction contact member 32, wherein, since the vertical rod 321 is provided with external threads, the tray 341 and the vertical rod 321 The end wall of the socketed hollow hole is provided with an internal thread threadedly connected with the external thread, so that the user can adjust the up and down distance of the tray 341 conveniently, and the position of the tray 341 can also be fixed;

The loading weight 342 is set on the friction contact member 32 and pressed against the tray 341, specifically, the loading weight 342 is set on the vertical rod 321 of the friction contact member 32 and pressed against the tray 341;

The weight fixing part 343 is connected with the friction contact part 32 and moves to press against the upper surface of the loading weight 342, specifically, the weight fixing part 343 is threadedly connected with the vertical rod 321 of the friction contact part 32 and moves to press against the loading weight 342. The upper surface of the weight 342, wherein the weight fixing part 343 is a fixing nut, so as to facilitate material collection.

Please refer to Fig. 1 again, the mounting bracket 10 of the present embodiment comprises a lower base plate 11, an upper supporting plate 12 and a supporting column 13, the upper supporting plate 12 and the lower base plate 11 are arranged at intervals, and the supporting column 13 is arranged on the upper supporting plate 12 and the lower base plate 11, wherein, the lower base plate 11 and the upper supporting plate 12 are square plates, and there are four supporting columns 13, and the four supporting columns 13 are arranged around the upper supporting plate 12 and the lower base plate 11; and , the mounting bracket 10 is correspondingly equipped with hexagon socket bolts for fixing the upper supporting plate 12, the lower base plate 11, and the supporting column 13. Specifically, the four corners of the upper supporting plate 12 and the lower base plate 11 are provided with step through holes, and the upper and lower ends of the four support columns 13 are provided with blind holes corresponding to the step through holes, and the blind holes are tapped with internal threads; when installing, four hexagon socket bolts are used to pass through the upper Four step holes of the supporting plate 12, and the four hexagon socket bolts are screwed to the blind holes at the upper ends of the four support columns 13; The foot nails 14 of the support adopt four hexagon socket bolts to pass through the four step holes of the foot nails 14 and the lower base plate 11 successively, and make the four hexagon socket bolts threadedly connected with the blind holes at the lower ends of the four support columns 13, by This completes the assembly of the mounting bracket 10 . Preferably, the motor 20 and the lever load testing device 30 are arranged on the upper supporting plate 12, and the information collection and processing module 40, the power switch 50, and the servo motor driver 60 are arranged on the lower base plate 11, because the mounting bracket 10 passes through the lower plate The base plate 11 and the upper supporting plate 12 are divided into two layers, which is beneficial to the installation arrangement of each component.

The working principle of the shaft component coating friction and wear testing machine 100 of this embodiment will be further described in conjunction with the drawings below:

When testing, the shaft parts P are first installed on the output shaft of the motor 20, and ensure that the axis of the output shaft of the motor 20 coincides with the axis of the shaft parts P; then, by adjusting the left and right positions of the loading lever 31 , so that the friction contact piece 32 is close to the test position of the shaft component P, then use the leveling unit 33 to adjust the horizontal balance of the loading lever 31, and adjust the upper and lower positions of the friction contact piece 32, so that the friction contact piece is just in line with the shaft Parts P contact, then adjust the friction sensing unit 35 so that it is close to the friction contact piece 32, and just cling to the bushing 314 provided at the first end of the loading lever, and then, use the loading unit 34 to apply a load, and through the friction contact Part 32 acts on the load vertically on the shaft parts P; after the completion, the power switch 50 can be started, and the relevant test parameters of the shaft parts P are set on the computer, such as the rotating speed, diameter, and test parameters of the shaft parts P. time, and the quality of the loading unit 34, after that, the motor 20 can be started, and the output shaft of the motor 20 will rotate and work, and drive the shaft parts P to rotate together. , the friction sensing unit 35 will sense its relevant friction conditions and send the corresponding information to the information collection and processing module 40, and the information collection and processing module 40 will send it to the computer after processing the information, and then the computer will send the corresponding information to the computer. The information is analyzed and processed to obtain the real-time data of the friction force and friction coefficient of the coating of the shaft parts P, and at the same time, the computer draws the curve of the friction force and friction coefficient over time.

The above description is only a preferred embodiment of the present invention, and its structure is not limited to the shapes listed above. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in this document. within the scope of protection of the invention.

Claims (9)

1. Coating friction and wear testing machine for shaft parts, characterized in that it includes: Mounting brackets for component mounting settings; A motor used to connect and fix shaft parts and drive the shaft parts to rotate, the motor is horizontally arranged on the mounting bracket, the output shaft of the motor is connected to the shaft parts, and the motor The axis of the output shaft coincides with the axis of the shaft parts; A lever load test device for testing the wear resistance of the coating on the outer surface of the shaft parts, the lever load test device includes a loading lever, a friction contact piece that is in frictional contact with the shaft parts, and A leveling unit for adjusting the horizontal balance of the loading lever, a loading unit for applying load to the shaft parts, and a device for sensing the friction condition between the friction contact piece and the shaft parts The friction sensing unit, the loading lever is freely rotatable and set on the installation bracket, the friction contact piece is set on the first end of the loading lever, and the leveling unit is set on the second end of the loading lever On the second end of one end, the loading unit is arranged on the upper end of the friction contact member, and the friction sensing unit is installed on the mounting bracket; The lever load testing device also includes a lever connection seat for connecting and fixing the loading lever and making the loading lever movable, and the lever connection seat includes: a lower slider arranged on the mounting bracket; sliding an upper slider arranged on the lower slider and cooperating with the lower slider; a sliding restriction member interposed between the upper slider and the lower slider to restrict relative sliding between the upper slider and the lower slider; and Vertically rotate the lever support on the upper slider; Wherein, the loading lever passes through the lever support and is hinged on the lever support; An information collection and processing module for receiving information about the friction condition between the friction contact piece and the shaft component transmitted by the friction sensing unit and performing A/D conversion processing on the information, the information The collection and processing module is installed on the mounting bracket, and the information collection and processing module is electrically connected to the friction sensing unit; A computer for receiving digital information transmitted by the information collection and processing module and analyzing and processing the digital information, the computer is electrically connected to the information collection and processing module; and The power switch used to control the switch of the motor, the friction induction unit, the information collection and processing module and the computer, the power switch is arranged on the mounting bracket, and the power switch is respectively connected to the The motor, the friction sensing unit, the information collection and processing module are electrically connected to the computer. 2. The coating friction and wear testing machine for shaft parts as claimed in claim 1, characterized in that: the lower end of the upper slider is provided with a sliding bump, and the upper end of the lower slider is provided with a The sliding groove of the sliding projection, the sliding projection is provided with a first sliding piece, the sliding groove is provided with a second sliding piece corresponding to the first sliding piece, the upper sliding piece The first sliding piece is slidably arranged on the lower slider through the cooperation of the first sliding piece and the second sliding piece. 3. The coating friction and wear testing machine for shaft parts as claimed in claim 2, characterized in that: the first sliding member is arranged on the sliding bump and facing the end surface of the sliding groove A rack, the rack is extended along the sliding direction of the sliding protrusion and is located on the end surface of the sliding protrusion facing the sliding groove, the second sliding member is correspondingly engaged with the rack gear shaft. 4. The coating friction and wear testing machine for shaft parts as claimed in claim 1, characterized in that: the upper end of the upper slider is provided with a support installation groove, and the lower end of the lever support is provided with at least one The first bearings are arranged on the upper slider for vertical rotation by the interference fit between each of the first bearings and the installation groove of the support. 5. The coating friction and wear testing machine for shaft parts as claimed in claim 1, characterized in that: the upper end of the lever support is provided with an installation opening, and the loading lever is provided with a rotationally arranged rotating pin, The loading lever is hinged on the lever support member through the rotating pin being arranged on the installation opening. 6. The coating friction and wear testing machine for shaft parts as claimed in claim 5, characterized in that: the loading lever is provided with a pin mounting hole, and the rotating pin sleeve is provided with at least one second bearing, so The rotating pin shaft is rotatably arranged on the loading lever through the interference fit between each of the second bearings and the pin shaft installation hole. 7. The coating friction and wear testing machine for shaft parts according to any one of claims 1-6, wherein the friction sensing unit includes: An induction mounting plate, the induction mounting plate is arranged on the mounting bracket; A friction sensor, the friction sensor is arranged on the induction mounting plate through a cantilever and faces to the friction contact piece, the first end of the cantilever is moved on the induction mounting plate, relative to the cantilever the second end of the first end is connected to the friction sensor; and The sensor movement limiting part is passed through the induction mounting plate and can move and contact the cantilever. 8. The coating friction and wear testing machine for shaft parts according to any one of claims 1-6, characterized in that: the friction contact parts include vertical rods, grinding wheels for contacting with the shaft parts A ball and a ball chuck for clamping the ball, the ball chuck is sleeved on the lower end of the vertical rod and clamped on the ball, the ball part is exposed to the ball the lower end of the chuck; The first end of the loading lever is provided with a mounting sleeve, and the mounting sleeve is sleeved on the vertical rod. 9. The coating friction and wear testing machine for shaft parts according to any one of claims 1-6, characterized in that: the leveling unit includes a counterweight sleeved on the second end of the loading lever Piece; The loading unit includes a tray, a loading weight, and a weight fixing member. The tray is movable and sleeved on the upper end of the friction contact, and the loading weight is placed on the friction contact and pressed against the tray. Above, the weight fixing part is connected with the friction contact part and moves to press against the upper surface of the loading weight.