CN113376047B - A rotary reciprocating friction testing machine - Google Patents

Abstract

The invention discloses a rotary reciprocating friction testing machine, which comprises a base, a plurality of vertical guide rods, a lifting drive mechanism, a voice coil motor and a rotating mechanism are arranged on the base, and a lifting mechanism is movably arranged on the plurality of vertical guide rods. The mechanism and the lifting driving mechanism are connected by screw transmission, the lifting mechanism is provided with a grinding pair fixing device, the upper gap of the rotating mechanism is provided with a reciprocating test bench, and the reciprocating test bench is detachably arranged on the base, the voice coil motor and the reciprocating test Drive connection. Among them, the reciprocating test bench can be quickly disassembled, so that the rotary reciprocating friction tester can be easily switched between the two tests of rotation and reciprocating friction.

Description

A rotary reciprocating friction testing machine

technical field

The invention relates to the field of friction experiments, in particular to a rotary reciprocating friction testing machine.

Background technique

In all kinds of machinery, the mutual motion between workpieces will inevitably lead to friction and wear, which will lead to the reduction of the life of the equipment or even failure. It is increasingly necessary to study the consequences of friction and wear. In this process, the friction and wear testing machine that simulates the actual working conditions needs to have more functions to make the test closer to the actual wear behavior.

At present, the functions and test conditions of the existing friction and wear testing machines are relatively simple.

A pin-on-disk friction testing machine (CN207379898U) is equipped with a friction disc and a friction pin for friction testing on the table of the test bench; the friction disc is driven to rotate by a driving device arranged in the test bench, and the friction pin is connected to On an adjustment device fixed on the test bench and used to adjust the pressure and position between the friction pin and the friction disc. This structure can adjust some experimental parameters of rotating friction, but it can only simulate rotating friction, and cannot simulate reciprocating friction and wear behavior or heavy-load friction and wear behavior.

A reciprocating friction testing machine (CN206891889U), including a frame, a hydraulic station is arranged at the bottom of the frame, the side of the frame is connected to the console through signal lines, and the upper end of the frame is fixedly connected to the test bench, hydraulic cylinder and stroke control parts, and the test bench A sample pressurizing part is arranged on the upper surface, and a pulling pressure sensor is arranged at the piston end of the hydraulic cylinder. This structure can adjust some experimental parameters of reciprocating friction, but it can also only simulate reciprocating friction, and cannot simulate rotating friction and wear behavior or heavy-load friction and wear behavior.

Contents of the invention

Aiming at the above-mentioned deficiencies of the prior art, the present invention provides a multifunctional rotary reciprocating friction testing machine.

In order to achieve the above-mentioned purpose of the invention, the technical scheme adopted in the present invention is:

A rotary reciprocating friction testing machine is provided, which includes a base on which several vertical guide rods, a lifting drive mechanism, a voice coil motor and a rotating mechanism are provided, and several vertical guide rods are movably provided with a lifting mechanism, the lifting mechanism and the lifting mechanism The driving mechanism is connected by screw transmission, the lifting mechanism is equipped with a grinding pair fixing device, the upper gap of the rotating mechanism is provided with a reciprocating test bench, and the reciprocating test bench is detachably set on the base, and the voice coil motor is connected to the reciprocating test bench. .

Further, the lifting drive mechanism includes a lifting bracket, the upper end of the lifting bracket is provided with a motor fixing bracket, the upper end of the vertical guide rod is provided with a fixed cover, the motor fixing bracket is fixedly connected with the fixed cover, and the motor fixing bracket is provided with a stepping motor A lead screw is movably arranged on the lifting bracket, the stepping motor is connected with the leading screw, the lifting mechanism is provided with a lifting nut, the lifting nut is meshed with the leading screw, and the stepping motor is connected with the upper electromechanical.

Further, a second supporting plate for stabilizing the lifting frame is arranged on the lifting frame, and the second supporting plate is fixedly connected with the base.

Further, the lifting mechanism includes several ball guide rail devices, the ball guide rail devices are movably sleeved on the vertical guide rod, the several ball guide rail devices are fixedly connected through the loading platform support frame, and several vertical slider guide rail devices are movable on the loading platform support frame, Several vertical slider guide rail devices are fixedly connected through the loading platform, the lower end of the loading platform is provided with a first horizontal slider guide rail device, and the lower end of the first horizontal slider guide rail device is provided with a grinding pair fixing device for fixing the grinding pair steel balls.

Further, the first horizontal slider guide rail device is provided with an adjustment knob for adjusting the horizontal position of the grinding pair fixing device, and the grinding pair fixing device is provided with a compression spring, a pressure sensor and a grinding pair fixing pin, and the pressure sensor is fixedly arranged at the compression The upper end of the spring and the fixed pin of the grinding pair are movably arranged at the lower end of the compression spring. A friction sensor is arranged between the side wall of the grinding pair fixing device and the first horizontal slider guide rail device. The adjustment knob, the pressure sensor and the friction sensor are all connected with each other. Upper electromechanical connection.

Further, the side wall of the support frame of the loading platform is provided with a placement mechanism capable of placing laterally loaded weights, and the lower end of the loading platform is provided with several heavy-duty suspenders, several heavy-duty suspenders run through the base, and some heavy-duty suspenders The lower end of the loading boom is horizontally hoisted with a heavy-duty platform.

Further, the reciprocating test bench includes a first support plate, the first support plate is detachably arranged on the base, a second horizontal slider guide rail device is movably arranged on the first support plate, and a second horizontal slider guide rail device is provided on the second horizontal slider guide rail device. There is a reciprocating friction fixture, which is provided with a number of threaded holes for fixing the sample, the second horizontal slider guide rail device is connected with the voice coil motor, and the voice coil motor is installed on the base through the fixing frame, and on the fixing frame A laser displacement sensor is provided, and both the voice coil motor and the laser displacement sensor are connected with the upper electromechanical.

Further, the rotating mechanism includes a rotating fixture fixed plate, on which a number of threaded holes for fixing the sample are arranged, and through holes are arranged on the base, through which the rotating fixture fixed plate passes through, and the fixture fixed plate is installed through bearings. On the through hole, the lower end of the fixture fixing plate is fixedly connected with a coupling by screws, the coupling is connected with the rotating shaft of the servo motor, the servo motor is arranged at the lower end of the base, and the servo motor is connected with the upper electromechanical.

Further, the base is provided with several universal wheels for convenient position adjustment.

The beneficial effects of the present invention are:

The rotary reciprocating friction testing machine of this scheme, wherein the reciprocating test bench is set on the base by screws, so that it can be disassembled quickly, so that the rotary reciprocating friction testing machine can conveniently switch between the two tests of rotating and reciprocating friction; the lifting mechanism It is connected with the lifting drive mechanism through the lead screw and the lifting nut, and has the advantages of simple structure, high precision and strong reliability.

Both the reciprocating friction fixture and the fixture fixing plate are provided with a plurality of regularly arranged threaded holes, the threaded holes of the reciprocating friction fixture are used to fix various samples of different structures, the threaded holes of the fixture fixing plate are used to fix the rotating fixture, the rotating fixture It is used to fix various samples and diversify the functions of the equipment.

The pressure sensor can measure the pressure exerted by the steel ball of the grinding pair on the sample, the friction sensor can measure the friction between the steel ball of the grinding pair and the sample, the laser displacement sensor can measure the reciprocating displacement, and the pressure sensor and There is a certain distance between the friction sensor and the actual friction surface, and most of the force that will damage the sensor is absorbed by the workpiece during the force transmission process, ensuring the stability of data acquisition; the laser displacement sensor has good straightness and measurement accuracy High excellent characteristics.

Loading and deloading the loading platform by changing the size of the loading weight and the lateral loading weight. If you want to increase the weight, add the corresponding weight on the heavy loading platform. The heavy-duty suspender is installed at the bottom of the base, which makes it more convenient and safe to add heavy weights, and improves the adaptability and safety of the equipment.

The stepping motor has the characteristics of high precision, fast response of start-stop and overturn, and strong reliability, so that the lifting mechanism driven by the stepping motor can achieve high-precision and fast-response lifting action, so that the steel ball of the grinding pair can be more quickly connected to the sample surface contact, saving sample change time and improving equipment efficiency; the servo motor has high precision, stable high and low speed operation, low noise, and short dynamic response time of motor acceleration and deceleration, so that the rotating mechanism driven by the servo motor has stable operation, fast response and reliability. Strong characteristics; the voice coil motor has the characteristics of high precision and high frequency response, so that the reciprocating friction fixture can move and control in the horizontal direction accurately and conveniently.

Description of drawings

Figure 1 is a front view of a rotary reciprocating friction testing machine.

Fig. 2 is a side sectional view of the rotary reciprocating friction testing machine.

Fig. 3 is a perspective view of a rotary reciprocating friction testing machine.

Among them, 1. Stepping motor, 2. Motor fixing bracket, 3. Pulley, 4. Lifting bracket, 5. Loading platform support frame, 6. Loading weight, 7. Loading platform, 8. Adjusting knob, 9. First Horizontal slider guide rail device, 10, friction sensor, 11, vertical slider guide rail device, 12, ball guide rail device, 13, side loading weight, 14, heavy-duty suspender, 15, grinding pair fixing device, 16 , reciprocating friction fixture, 17, the second horizontal slider guide rail device, 18, the first support plate, 19, the fixed plate of the rotating fixture, 20, the servo motor, 21, the universal wheel, 22, the heavy-duty platform, 23, the base Seat, 24, fixed frame, 25, fixed flange, 26, vertical guide rod, 27, voice coil motor, 28, laser displacement sensor, 29, pulley sling fixed rod, 30, fixed cover plate, 31, compression spring, 32, grinding pair fixed pin, 33, bearing, 34, shaft coupling, 35, leading screw nut mechanism, 36, lifting nut, 37, leading screw, 38, second support plate, 39, pressure sensor.

Detailed ways

The specific embodiments of the present invention are described below so that those skilled in the art can understand the present invention, but it should be clear that the present invention is not limited to the scope of the specific embodiments. For those of ordinary skill in the art, as long as various changes Within the spirit and scope of the present invention defined and determined by the appended claims, these changes are obvious, and all inventions and creations using the concept of the present invention are included in the protection list.

As shown in Figure 1, Figure 2 and Figure 3, the rotary reciprocating friction testing machine of this program includes a base 23 on which four vertical guide rods 26, a lifting drive mechanism, a voice coil motor 27 and a rotating mechanism are arranged. , the four vertical guide rods 26 are fixedly connected with the base 23 through the fixed flange 25, the four vertical guide rods 26 are movable and provided with a lifting mechanism, the lifting mechanism and the lifting drive mechanism are connected through a screw drive, and the lifting mechanism is provided with a grinding pair The fixing device 15 and the upper gap of the rotating mechanism are provided with a reciprocating test bench, and the reciprocating test bench is detachably arranged on the base 23, and the voice coil motor 27 is connected to the reciprocating test bench by transmission.

The lifting drive mechanism includes a lifting bracket 4, the upper end of the lifting bracket 4 is provided with a motor fixing bracket 2, the motor fixing bracket 2 is a U-shaped groove structure, and the upper ends of the four vertical guide rods 26 are horizontally provided with a fixed cover plate 30, and the fixed cover plate 30 It is threadedly connected with four vertical guide rods 26, and the motor fixed bracket 2 is screwed with the fixed cover plate 30, so that the lifting bracket 4, the motor fixed bracket 2, the fixed cover plate 30 and the four vertical guide rods 26 are fixedly connected together, which is beneficial to Strengthen the stability when the lifting mechanism on the vertical guide rod 26 cooperates with the lifting drive mechanism to run. The lower end of the fixed cover plate 30 is provided with three pulleys 3 and a pulley suspension rope fixing rod 29 for hoisting the lifting mechanism.

One side of lifting support 4 is provided with the second support plate 38 that is used for stabilizing lifting support 4, and second support plate 38 is fixedly connected on the base 23, and the other side of lifting support 4 is movably provided with lead screw 37, and lead screw 37 vertical Placed upright and free to rotate, the motor fixing bracket 2 is provided with a stepping motor 1, and the rotating shaft of the stepping motor 1 is connected to the screw 37, so that the stepping motor 1 can drive the screw 37 to rotate, and the lifting mechanism is provided with a screw. The rod nut mechanism 35, the vertical fixing on the leading screw nut mechanism 35 is provided with the lifting nut 36, the lifting nut 36 is engaged with the leading screw 37, when the stepping motor 1 drives the leading screw 37 to rotate, the leading screw 37 can drive the lifting The lifting of the nut 36 realizes the rising and falling of the whole lifting mechanism. The stepping motor 1 is connected with the upper electromechanical system. The stepping motor 1 has the characteristics of high precision, fast response of start-stop and flipping, and strong reliability, so that the lifting mechanism driven by the stepping motor 1 can realize the lifting action with high precision and fast response.

The lifting mechanism includes four ball guide rail devices 12, which are respectively movably sleeved on four vertical guide rods 26, and the four ball guide rail devices 12 are fixedly connected together by the loading platform support frame 5, and the loading platform support frame 5 can be regarded as composed of three U-shaped plates, in which two first plates with the same structure are arranged in parallel, and the ends of the two first plates are fixedly connected by the second plate, and the second plate is perpendicular to the first plate Setting, two ball guide rail devices 12 are fixedly connected on the outer side walls of the two first flat plates, the screw nut mechanism 35 is fixedly arranged on the outer side walls of the second flat plates, and the inner side walls of the two first flat plates are all movable There are two vertical slider guide rail devices 11, and the sliders of the four vertical slider guide rail devices 11 are fixedly connected through the loading platform 7.

The loading weight 6 can be placed on the loading platform 7, and the outer side walls of the two first flat plates of the loading platform support frame 5 are all movable provided with a placement mechanism that can place the lateral loading weight 13, and the lower end of the loading platform 7 is provided with four A heavy-duty suspender 14, four heavy-duty suspenders 14 run through the base 23, and the lower ends of the four heavy-duty suspenders 14 are horizontally hung with a heavy-duty platform 22, by replacing the loading weight 6 and the lateral The size of loading weight 13 carries out adding and subtracting load, then adds corresponding weight on heavy-duty platform 22 and gets final product as adding weight.

The upper end of the loading platform 7 is provided with two pulleys 3, and the two pulleys 3 cooperate with the three pulleys 3 on the fixed cover plate 30 and the pulley suspension rope fixing rod 29 through the suspension rope, and are finally connected to the placement mechanism to realize lateral loading Weight 13 loads and unloads loading platform 7. The lower end of the loading platform 7 is movably provided with a first horizontal slider guide rail device 9, the slider of the first horizontal slider guide rail device 9 is provided with a grinding pair fixing device 15 for fixing the grinding pair steel balls, and the first horizontal slider guide rail The adjustment knob 8 for adjusting the horizontal position of the grinding pair fixing device 15 is fixedly arranged on the device 9, and the grinding pair fixing device 15 is provided with a compression spring 31, a grinding pair fixing pin 32 and a pressure sensor 39, and the pressure sensor 39 is fixedly arranged at the compression The upper end of the spring 31 and the grinding pair fixing pin 32 are fixedly provided with the lower end of the compression spring 31. The grinding pair fixing pin 32 is used to fix the grinding pair steel ball. Conducted to the pressure sensor 39, so that the pressure sensor 39 can measure the pressure exerted by the steel ball of the grinding pair on the sample, and a friction sensor 10 is arranged between the side wall of the grinding pair fixing device 15 and the first horizontal slider guide rail device 9, The friction sensor 10 is used to measure the friction between the steel ball of the grinding pair and the sample. There is a certain distance between the pressure sensor 39 and the friction sensor 10 and the actual friction surface, and most of the sensors are damaged during the force transmission process. The impact force is absorbed by the workpiece, ensuring the stability of data acquisition. The adjusting knob 8, the pressure sensor 39 and the friction sensor 10 are all electrically connected with the host machine.

The reciprocating test bench includes a first support plate 18, the first support plate 18 is connected with the base 23 by screws, the first support plate 18 is arranged above the rotating mechanism with a gap, and a second horizontal slide is movable on the first support plate 18. Block guide rail device 17, the slider of the second horizontal slider guide rail device 17 is provided with a reciprocating friction clamp 16, the slider of the second horizontal slider guide rail device 17 is connected with the voice coil motor 27 by screw transmission, so that the voice coil motor 27 The slider that can drive the second horizontal slider guide rail device 17 slides smoothly in the horizontal direction, the voice coil motor 27 is installed on the base 23 through the fixed frame 24, the fixed frame 24 is provided with a laser displacement sensor 28, and the laser displacement sensor 28 For detecting the displacement, the voice coil motor 27 and the laser displacement sensor 28 are both electrically connected with the host machine. The voice coil motor 27 has the characteristics of high precision and high frequency response, and can accurately and conveniently move and control in the horizontal direction. The laser displacement sensor 28 has the excellent characteristics of good straightness and high measurement accuracy.

The rotating mechanism includes a rotating fixture fixed disk 19, a through hole is provided on the base 23, the rotating fixture fixed disk 19 runs through the through hole, and the fixture fixed disk 19 is installed on the through hole through a bearing 33, the clamp fixed disk 19 can rotate freely, and the clamp The lower end of the fixed disc 19 is fixedly connected with a shaft coupling 34 by screws, the shaft coupling 34 is connected with the rotating shaft of the servo motor 20, the servo motor 20 is detachably arranged on the lower end of the base by screws, and the servo motor 20 is connected with the upper electromechanical. The servo motor 20 has high precision, stable high and low speed operation, low noise, and short dynamic response time of motor acceleration and deceleration.

Both the reciprocating friction fixture 16 and the fixture fixing plate 19 are provided with a plurality of regularly arranged threaded holes, the threaded holes of the reciprocating friction fixture 16 are used to fix various samples of different structures, and the threaded holes of the fixture fixing plate 19 are used to fix the rotation Fixtures, rotating fixtures are used to fix various specimens.

The bottom of the base 23 is provided with four universal wheels 21 for convenient position adjustment.

In the test, the pressure sensor 39 can measure the pressure exerted by the steel ball of the grinding pair on the sample, the friction sensor 10 can measure the friction force between the steel ball of the grinding pair and the sample, and the laser displacement sensor 28 can measure the reciprocating force. Displacement, the signals of the pressure sensor 39, the friction sensor 10, and the laser displacement sensor 28 are transmitted to the acquisition card through the transmitter, and the acquisition card is connected with the host computer. According to the acquisition results, the pressure, friction force and Displacement data; the drivers of the stepper motor 1, servo motor 20, and voice coil motor 27 are all connected to the plc, the plc is connected to the acquisition card, and the acquisition card is connected to the upper computer, thereby controlling the movement of the motor through the upper computer.

In specific implementation, when a reciprocating friction sample is required:

Step 1: Fix the polished sample on the reciprocating friction fixture 16, and fix the grinding pair steel ball on the grinding pair fixing pin 32;

Step 2: Control the voice coil motor 27 through the host computer, so that the positions of the reciprocating friction fixture 16 and the horizontal slider guide rail device 17 are fixed;

Step 3: Operate the adjustment knob 8 to align the steel ball of the grinding pair with the sample;

Step 4: Control the stepper motor 1 through the host computer to move the loading platform 7, so that the steel balls of the grinding pair are in contact with the sample;

Step 5: Load by changing the size of the loading weight 6 and the lateral loading weight 13. If it is necessary to increase the weight, add the corresponding weight on the loading platform 22. The pressure sensor 39 passes through the grinding pair fixing pin 32 and Compression spring 31 conducts to the pressure, finally measures the pressure applied to the sample;

Step 6: After the loading is stable, the upper computer controls the voice coil motor 27 to drive the reciprocating friction fixture 16 to perform a corresponding reciprocating motion, and then the reciprocating friction experiment of the sample can be realized.

When a friction specimen needs to be rotated:

Step 1: Remove the fixing screws between the second horizontal slider guide rail device 17 and the voice coil motor 27, remove the screws between the first support plate 18 and the base 23, and remove the entire reciprocating test bench;

Step 2: Fix the polished sample on the rotating fixture, the rotating fixture is fixed on the rotating fixture fixed plate 19, and the grinding pair steel ball is fixed on the grinding pair fixing pin 32;

Step 3: Control the servo motor 20 through the host computer to fix the position of the rotating fixture fixing plate 19 and prevent it from rotating;

Step 4: Operate the adjustment knob 8 to align the steel ball of the grinding pair with the sample;

Step 5: Control the stepper motor 1 through the host computer to move the loading platform 7, so that the grinding pair and the sample are in contact;

Step 6: Load by changing the size of the loading weight 6 and the lateral loading weight 13. If it is necessary to increase the weight, add the corresponding weight on the heavy-duty loading platform 22. The pressure sensor 39 passes through the grinding pair fixing pin 32 and Compression spring 31 conducts to the pressure, finally measures the pressure applied to the sample;

Step 7: After the loading is stable, the host computer controls the servo motor 20 to drive the rotary fixture to perform a rotary motion, so that the rotary friction experiment of the sample can be realized.

Claims (7)

1. A rotary reciprocating friction testing machine is characterized by comprising a base (23), wherein a plurality of vertical guide rods (26), a lifting driving mechanism, a voice coil motor (27) and a rotating mechanism are arranged on the base (23), the lifting mechanisms are movably arranged on the vertical guide rods (26) and are in transmission connection with the lifting driving mechanism through threads, a grinding pair fixing device (15) is arranged on each lifting mechanism, a reciprocating test bed is arranged in a gap above the rotating mechanism and is detachably arranged on the base (23), and the voice coil motor (27) is in transmission connection with the reciprocating test bed;

the lifting mechanism comprises a plurality of ball guide rail devices (12), the ball guide rail devices (12) are movably sleeved on a vertical guide rod (26), the ball guide rail devices (12) are fixedly connected with a loading platform support frame (5), a plurality of vertical slider guide rail devices (11) are movably arranged on the loading platform support frame (5), the vertical slider guide rail devices (11) are fixedly connected with a loading platform (7), a first horizontal slider guide rail device (9) is movably arranged at the lower end of the loading platform (7), and a grinding pair fixing device (15) for fixing a grinding pair steel ball is arranged at the lower end of the first horizontal slider guide rail device (9);

the loading platform is characterized in that a placing mechanism capable of placing lateral loading weights (13) is movably arranged on the side wall of the loading platform supporting frame (5), a plurality of loading suspenders (14) are arranged at the lower end of the loading platform (7), the plurality of loading suspenders (14) penetrate through the base (23), and a plurality of loading platforms (22) are horizontally hung at the lower ends of the loading suspenders (14).

2. The rotating and reciprocating friction tester according to claim 1, wherein the lifting driving mechanism comprises a lifting support (4), a motor fixing support (2) is arranged at the upper end of the lifting support (4), a fixing cover plate (30) is arranged at the upper end of the vertical guide rod (26), the motor fixing support (2) is fixedly connected with the fixing cover plate (30), a stepping motor (1) is arranged on the motor fixing support (2), a lead screw (37) is movably arranged on the lifting support (4), the stepping motor (1) is in transmission connection with the lead screw (37), a lifting nut (36) is arranged on the lifting mechanism, the lifting nut (36) is meshed with the lead screw (37), and the stepping motor (1) is electrically connected with an upper computer.

3. The rotating and reciprocating friction tester according to claim 2, characterized in that the lifting bracket (4) is provided with a second support plate (38) for stabilizing the lifting bracket (4), and the second support plate (38) is fixedly connected with the base (23).

4. The rotating and reciprocating friction testing machine according to claim 1, characterized in that an adjusting knob (8) for adjusting the horizontal position of the grinding pair fixing device (15) is arranged on the first horizontal sliding block guide rail device (9), a compression spring (31), a pressure sensor (39) and a grinding pair fixing pin (32) are arranged in the grinding pair fixing device (15), the pressure sensor (39) is fixedly arranged at the upper end of the compression spring (31), the grinding pair fixing pin (32) is movably arranged at the lower end of the compression spring (31), a friction force sensor (10) is arranged between the side wall of the grinding pair fixing device (15) and the first horizontal sliding block guide rail device (9), and the adjusting knob (8), the pressure sensor (39) and the friction force sensor (10) are electrically connected with an upper computer.

5. The rotary reciprocating friction testing machine according to claim 1, wherein the reciprocating test bed comprises a first supporting plate (18), the first supporting plate (18) is detachably arranged on a base (23), a second horizontal slider guide rail device (17) is movably arranged on the first supporting plate (18), a reciprocating friction clamp (16) is arranged on the second horizontal slider guide rail device (17), a plurality of threaded holes for fixing a sample are formed in the reciprocating friction clamp (16), the second horizontal slider guide rail device (17) is in transmission connection with a voice coil motor (27), the voice coil motor (27) is installed on the base (23) through a fixing frame (24), a laser displacement sensor (28) is arranged on the fixing frame (24), and the voice coil motor (27) and the laser displacement sensor (28) are both electrically connected with an upper computer.

6. The rotating and reciprocating friction tester according to claim 1, characterized in that the rotating mechanism comprises a rotating clamp fixing disk (19), a plurality of threaded holes for fixing the sample are arranged on the clamp fixing disk (19), a through hole is arranged on the base (23), the rotating clamp fixing disk (19) penetrates through the through hole, the clamp fixing disk (19) is mounted on the through hole through a bearing (33), the lower end of the clamp fixing disk (19) is fixedly connected with a coupler (34) through a screw, the coupler (34) is connected with a rotating shaft of the servo motor (20), the servo motor (20) is arranged at the lower end of the base, and the servo motor (20) is electrically connected with an upper computer.

7. The rotating and reciprocating friction tester according to claim 1, characterized in that the base (23) is provided with a plurality of universal wheels (21) facilitating position adjustment.

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