Patent ID: 12222326

DESCRIPTION OF REFERENCE NUMBERS

1. machine body;11. mounting frame;111. limiting rod;12. moving device;121. power element;122. moving screw;123. sliding rod;13. connecting seat;14. vibration element;141. vibration shaft;1411. connecting block;2. first fixing element;21. first fixing portion;22. first clamping plate;221. first clamping block;23. second clamping plate;231. second clamping block;24. driving screw;3. second fixing element;31. the second fixing portion;311. guiding portion;32. first chuck;33. second chuck;331. guiding rod;34. fixing screw;4. detection assembly;41. friction force sensor;42. sound sensor;43. pressure sensor;44. vibration sensor;45. travel sensor;451. detection rod;5. collision device;51. mounting substrate;52. mounting seat;521. fixing groove;522. sliding groove;53. sliding column;531. control head;54. adjusting assembly;541. first elastic element;542. drive element;55. rebound assembly;551. rebound element;552. second elastic element;6. first testing element; and7. second testing element

Specific embodiments of the present application have been shown by the above-mentioned drawings, and will be described in more detail hereinafter. These drawings and descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments.

DESCRIPTION OF EMBODIMENTS

As mentioned in the background art, at present, there are many types of material tests according to different material properties, for example, frictional wear test, collision test, hardness test and tensile test, etc. When carrying out these material property tests, due to different test methods, the current common test equipment usually can only carry out a single type of property test, so that different devices and equipment are needed to complete different material tests. This makes the function of the test equipment relatively single, and the test equipment needs to be repeatedly replaced to complete different material tests, which will also lead to a low testing efficiency of the material test.

The frictional wear and collision law of materials is an important direction for studying materials. For example, at a sealing surface of a valve, there will be a micron-level amplitude movement between polymer-metal mating contact surfaces and other mating contact surfaces, causing frictional wear. After the polymer-metal surfaces are pressed tightly to each other to produce an indentation, a composite form of friction between the polymer-metal surfaces, which is generated due to the small-amplitude vibration caused by the indentation, is called fretting friction. The fretting friction can not only cause frictional wear between the sealing contact surfaces of the valve, resulting in loose closing, poor sealing or formation of wear particles, etc., but also accelerate the deformation and repeated wear of the indentation. In addition, with the repeated opening and closing of and slight collision of the polymer-metal friction sealing surfaces and slight collision of the surface, the fatigue life of the valve for sealing is greatly reduced. With the requirements of high precision, long life and high reliability in high-tech fields such as liquid hydrogen and liquid oxygen valves for launch vehicles, as well as various harsh working conditions, the hazards of fretting damage and collision wear are increasingly prominent, and have become one of the main reasons for valve failure.

Liquid hydrogen and liquid oxygen valves for launch vehicles are often applied in extreme working conditions such as liquid hydrogen (−253° C.) and liquid oxygen (−183° C.) fluid medium, strong load (transient load up to 100 g) and multiple opening and closing (strong vibration, frequent actions more than 100 times). Besides, due to constant switching between a deep and low temperature and a normal temperature and there is no available lubricant between key mating surfaces, materials of the valve parts experience a constitutive switching process of low-temperature embrittlement, normal-temperature elasticity and high-temperature softening in a wide temperature range, and the contact behavior of the sealing and mating surfaces is significantly different from that in conventional working conditions, which makes the performance of conventionally designed and manufactured valves extremely easy to be out of tolerance when they are in service in extreme working conditions, and even which leads to functional failure, resulting in major accidents such as launch vehicle destruction and fatalities, causing serious negative social impacts. Therefore, the fretting-collision friction test of materials in wide temperature range is beneficial to deeply reveal the evolution law of frictional wear, failure mechanism and correlation law of valve materials in extreme environments.

Hence, in order to solve the above-mentioned technical problems, the embodiments of the present application provide a material testing machine, which is provided with a first fixing element, a second fixing element and a detection assembly. During test, the first testing element is fixed by the first fixing element, and the second testing element is fixed by the second fixing element; when the first fixing element and the second fixing element are in a first state, the first testing element is in sliding contact with the second testing element, and the detection assembly detects a friction force and/or a friction sound between the first testing element and the second testing element, so as to conduct a material friction test; when the first fixing element and the second fixing element are in a second state, a collision force received by the first testing element or the second testing element is detected by the detection assembly, so as to conduct a material collision test, which enables the material testing machine to be applied to both the material frictional wear test and the material collision test, solving the problems that the function of the testing equipment is relatively single and the testing efficiency is low.

Exemplary embodiments will be described in detail herein, examples of which are illustrated in the accompanying drawings. Unless otherwise indicated, the same numerals in different drawings refer to the same or similar elements when the following description refers to the drawings. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present application. Rather, they are merely examples of devices and methods consistent with some aspects of the present application as recited in the appended claims.

The technical solutions of the present application and how the technical solutions of the present application solve the above-mentioned technical problems will be described in detail below in combination with specific embodiments. The following specific embodiments may be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below with reference to the accompanying drawings.

Referring toFIG.1, a material testing machine provided by the present application includes a machine body1, a first fixing element2, a second fixing element3and a detection assembly4; where both the first fixing element2and the second fixing element3are mounted to the machine body1, the first fixing element2is configured to mount a first testing element6, and the second fixing element3is configured to mount a second testing element7; when the first fixing element2and the second fixing element3are in a first state, the first testing element6is in sliding contact with the second testing element7, so as to conduct a frictional wear test; when the first fixing element2and the second fixing element3are in a second state, the first fixing element2drives the first testing element6to collide with the second testing element7, so as to conduct a collision test.

Further referring toFIG.1, the detection assembly4is configured to detect a target parameter, where when the first fixing element2and the second fixing element3are in the first state, the target parameter includes a friction force and/or a friction sound between the first testing element6and the second testing element7; and when the first fixing element2and the second fixing element3are in the second state, the target parameter includes a collision force received by the first testing element6or the second testing element7.

By using the above-mentioned technical solution, the first fixing element2is utilized to fix a first testing element6, and the second fixing element3is utilized to fix a second testing element7; when a material frictional wear test needs to be carried out, the first fixing element2and the second fixing element3are adjusted to the first state, so that the first testing element6and the second testing element7are in sliding contact, and the detection assembly4detects the friction force and/or friction sound between the first testing element6and the second testing element7, so as to realize the material frictional wear test; and when a material collision test needs to be carried out, the first fixing element2and the second fixing element3are adjusted to the second state, so that the first fixing element2drives the first testing element6to collide with the second testing element7, and the detection assembly4detects the collision force received by the first testing element6or the second testing element7, so as to conduct a material collision test. Therefore, the material testing machine provided in the embodiment of the present application is enabled to be applied to a research on the wear failure mechanism of special materials of liquid hydrogen and liquid oxygen valves for launch vehicles under high frequency fretting-collision conditions in a wide temperature range.

It should be noted that, in an embodiment of the present application, exemplarily, exemplarily, both the first testing element6and the second testing element7are elements to be tested, or one of the first testing element6and the second testing element7is an element to be tested, and the other is an item used in the test. This may be adjusted according to specific circumstances and is not limited in the present application.

In an embodiment of the present application, exemplarily, referring toFIGS.1and2, the machine body1is provided with a connecting seat13, the connecting seat13is slidably arranged on the machine body1along a first direction, and the first fixing element2is slidably arranged on the connecting seat13along a second direction, the connecting seat13is provided with a collision device5; the second fixing element3is slidably arranged on the machine body1along the second direction, and the machine body1is provided with a vibration element14.

It is easy to be understood that, the first direction and the second direction can be set to be various directions, as long as it can be ensured that the first fixing element2and the second fixing element3can have the first state and the second state. Exemplarily, the first direction is set to be a vertical direction, and the second direction is set to be a horizontal direction.

Specifically, referring toFIGS.1and2, exemplarily, when the first fixing element2and the second fixing element3are in the first state, that is, when the first testing element6is in sliding contact with the second testing element7, the connecting seat13is located at a first position and fixed relative to the machine body1, so that the first testing element6is fixed with the machine body1in the first direction; while in the second direction, the vibration element14drives the second fixing element3to vibrate, so as to drive the first fixing element2to slide on the connecting seat13along the second direction, and at the this time, the first testing element6slides on the second testing element7, so as to conduct a material frictional wear test. Exemplarily, the vibration element14can be made of a piezoelectric ceramic, so that the second testing element7can vibrate by energizing the piezoelectric ceramic, and the piezoelectric ceramics can be used to realize high-frequency reciprocating and precise driving, where the piezoelectric ceramic has a vibration frequency of about 30 kHz, and a displacement of 20 μm.

When the first fixing element2and the second fixing element3are in the second state, that is, when the first testing element6collides with the second testing element7, the second fixing element3is fixed relative to the machine body1; the connecting seat13is located at the second position and fixed relative to the machine body1, and in the first direction, there is a gap between the first testing element6and the second testing element7, and the collision device5drives the first fixing element2to move along the first direction, so that the first testing element6collides with the second testing element7, so as to conduct a material collision test.

It should be noted that the first position and the second position need to be adjusted according to the actual situation, where the first position needs to be determined when the first testing element6abuts against the second testing element7, and the second position needs to be determined according to a size of the gap between the first testing element6and the second testing element7.

In an embodiment of the present application, exemplarily, referring toFIG.1, the detection assembly4includes a friction force sensor41, a sound sensor42and a pressure sensor43; where the friction force sensor41is mounted to the connecting seat13and is in sliding contact with the first fixing element2, so as to detect the friction force between the first testing element6and the second testing element7; the sound sensor42is mounted to the machine body1; the pressure sensor43is mounted to the connecting seat13, and is configured to detect a pressure on the first fixing element2in the first direction.

By adopting the above-mentioned technical solution, when using the material testing machine to carry out the frictional wear test, the position of the connecting seat13is adjusted so that the connecting seat13drives the first testing element6to slide in the first direction, and so that the first testing element6abuts against the second testing element7, and the pressure sensor43can detect the pressure between first testing element6and the second testing element7, so as to adjust the pressure of the first testing element6to the second testing element7; the connecting seat13is located at the first position and is fixed relative to the machine body1, so that the first testing element6is fixed with the machine body1in the first direction, but can slide on the connecting seat13along the second direction; and at this time, the vibration element14drives the second fixing element3to vibrate, so as to drive the first fixing element2to slide on the connecting seat13in the second direction, and at this time the first testing element6slides on the second testing element7, and the friction force sensor41detects the friction force between the first testing element6and the second testing element7, and the sound sensor42detects a noise generated by the friction between the first testing element6and the second testing element7, and records a peak value of the sound wave, so that the material frictional wear test can be completed.

When using the material testing machine to conduct a collision test, the position of the connecting seat13is adjusted so that the connecting seat13drives the first testing element6, which is spaced apart from the second testing element7, to slide along the first direction, then the collision device5drives the first fixing element2to move in the first direction, so that the first testing element6collides with the second testing element7; and the pressure sensor43detects the collision force generated when the first testing element6collides with the second testing element7, so as to conduct the material collision test.

In an embodiment of the present application, exemplarily, referring toFIG.1andFIG.3, the detection assembly4further includes a vibration sensor44and/or a travel sensor45. When the first fixing element2and the second fixing element3are in the first state, the vibration sensor44is configured to detect a vibration frequency and a vibration amplitude of the second fixing element3; and the travel sensor45is configured to detect a vibration displacement of the second fixing element3in the second direction. The vibration sensor44and the travel sensor45can be mounted to the machine body1simultaneously, or one of the vibration sensor44and the travel sensor45can be provided on the machine body1.

When the vibration element14drives the second fixing element3to vibrate in the second direction, the vibration sensor44can detect the vibration frequency and the vibration amplitude of the second fixing element3; and the travel sensor45can detect the vibration displacement of the second fixing element3in the second direction. Therefore, the test process of the frictional wear test is more accurate, and more reference data can be obtained.

Referring toFIGS.1and2, in an embodiment of the present application, exemplarily, the machine body1further includes a moving device12, and the moving device12includes a moving screw122and a power element121; the moving screw122extends along the first direction, and is rotatably mounted to the machine body1around the first direction, and the connecting seat13is threaded to the moving screw122; and the power element121is mounted to the machine body1and is configured to drive the moving screw122to rotate. Therefore, the moving screw122drives the connecting seat13to move along in the first direction. The machine body1is further provided with a sliding rod123, which extends along the first direction and is disposed to pass through the connecting seat13, so as to play a certain guiding role in the sliding process of the connecting seat13.

By adopting the above technical solution, when the position of the connecting seat13in the first direction is adjusted, the power element121drives the moving screw122to rotate around the first direction, and the moving screw122is threaded to the connecting seat13, so that the connecting seat13can move on the moving screw122in the first direction, so as to adjust the position of the connecting seat13, thereby realizing the adjustment of the pressure of the first testing element6to the second testing element7in the frictional wear test, and the adjustment of the size of the gap between the first testing element6and the second test element7in the collision test.

As for the power element121, it can be selected from a variety of devices or equipment, such as an electric motor or a decelerated motor, as long as the normal rotation of the moving screw122can be ensured. It is worth mentioning that when a decelerated motor is selected as the power element121, the power element121can drive the moving screw122to rotate at a slow speed, so that a moving speed of the connecting seat13on the moving screw122is reduced, so as to further ensure the stability of the connecting seat13when it slides along the second direction on the moving screw122.

The structure of the second fixing element3and the mounting mode of the second fixing element3are described below. Referring toFIGS.3and4, in an embodiment of the present application, exemplarily, the second fixing element3includes a second fixing portion31, a first chuck32, a second chuck33and a fixing screw34; where the first chuck32is fixedly mounted to the second fixing portion31, the second chuck33is arranged opposite to the first chuck32and is slidably mounted to the second fixing portion31along a direction close to or away from the first chuck32, so that the second testing element7can be fixed by the first chuck32and the second chuck33, and the fixing screw34is threaded to the second fixing portion31and abuts against the second chuck33tightly.

Continuing to refer toFIGS.3and4, exemplarily, the first chuck32and the second chuck33are arranged along a third direction, and the second chuck33is further provided with a plurality of guiding rods331, each guiding rod331extends in the third direction, first ends of the guiding rods331are connected to the second chuck33, second ends of the guiding rods331pass through the second fixing portion31, and each of the guiding rods331is sleeved with a spring in an elongated state. One end of the spring is connected to the second end of the guiding rod331, and the other end of the spring is connected to the second fixing portion31. The second fixing portion31is also provided with a guiding portion311. The guiding portion311extends along the third direction and passes through the second chuck33, so as to play a certain guiding role in the movement of the second chuck33.

By adopting the above technical solution, when the second testing element7is to be fixed by the second fixing element3, the second testing element7is placed on the second fixing portion31, and is located between the first chuck32and the second chuck33, and by compressing the spring, the second chuck33is driven to move toward a direction close to the first chuck32, so that the second chuck33and the first chuck32clamp the second testing element7tightly, and the guiding portion311is disposed to pass through the second chuck33so as to play a certain guiding role, and then the fixing screw34is tightened, so that the fixing screw34is threaded to the second fixing portion31, and abuts against the second chuck33tightly. In this way, the second testing element7is fixed by the second fixing element3.

The mounting mode between the second fixing element3and the machine body1will be described below in conjunction with the accompanying drawings. Referring toFIGS.3and4, exemplarily, in a horizontal plane, the third direction is perpendicular to the second direction. The machine body1is provided with a mounting frame11, and the mounting frame11is provided with two limiting rods111, the two limiting rods111extend in the second direction, and are both disposed to pass through the second fixing portion31; the vibration element14has a vibration shaft141, and the vibration shaft141of the vibration element14extends along the second direction and passes through the mounting frame11, and the vibration shaft141of the vibration element14is connected with a connecting block1411, so as to be connected to the second fixing portion31through the connecting block1411and thus drive the second fixing portion31to vibrate in the second direction. The vibration sensor44is mounted between the vibration element14and the vibration shaft141, so that the detection of the vibration sensor44is more accurate; and the travel sensor45is mounted to a side of the mounting frame11away from the vibration element14in the second direction, and the travel sensor45is provided with a detection rod451, the detection rod451extends in the second direction, and passes through the mounting frame11to abut against the second fixing portion31.

Referring toFIGS.2and5-7, in an embodiment of the present application, exemplarily, a mounting substrate51is slidably arranged on the connecting seat13, the mounting substrate51can slide on the connecting seat13along the second direction, and the collision device5is mounted to the mounting substrate51, so that the collision device5can be mounted to the connecting seat13through the mounting substrate51. Specifically, the collision device5includes a mounting seat52and a sliding column53, the mounting seat52is mounted to the mounting substrate51, and the sliding column53is connected to the first fixing element2; when the sliding column53is in the first state, the sliding column53is fixed with the mounting seat52; when the sliding column53is in the second state, the sliding column53slides on the mounting seat52in the first direction, so that the first testing element6is driven by the first fixing element2to collide with the second testing element7.

By adopting the above technical solution, when using the material testing machine for the collision test, the position of the connecting seat13is adjusted so that the connecting seat13moves in the first direction, and there is a gap between the first testing element6and the second testing element7; the sliding column53is adjusted so that the sliding column53is in the first state, and the sliding column53is fixed with the mounting seat52; then the sliding column53is adjusted to the second state, so that the sliding column53slides on the mounting seat52along the first direction, and drives the first testing element6to move towards the direction close to the second testing element7, and the first testing element6collides with the second testing element7, thereby realizing the material collision test process.

Referring toFIGS.1and5-7, the first fixing element2is mounted to one end of the sliding column53along the first direction, and is close to the second fixing element3; the pressure sensor43is arranged between the first fixing element2and the sliding column53, that is, the pressure sensor43is connected to the sliding column53, and the first fixing element2is connected to the pressure sensor43, so that the detection result of the pressure sensor43is more accurate. The friction force sensor41is mounted to the connecting seat13and abuts against the mounting substrate51, so as to realize the detection of the friction force between the first testing element6and the second testing element7.

Continuing to refer toFIGS.5-7, exemplarily, the mounting seat52is provided with a sliding groove522and a fixing groove521, which are communicated with each other; the sliding groove522extends along the first direction, and an included angle is formed between an extension direction of the fixing groove521and the first direction; the sliding column53is provided with a control head531, and when the sliding column53is in the first state, the control head531is clamped in the fixing groove521, so that the sliding column53can be fixed with the mounting seat52; and when the column53is in the second state, the control head531slides in the sliding groove522in the first direction, so that the first fixing element2drives the first testing element6to collide with the second testing element7.

Referring toFIGS.5-7, the collision device5further includes an adjustment assembly54. The adjustment assembly54includes a first elastic element541and a drive element542. The drive element542is mounted to the mounting substrate51and has a piston rod. A first end of the first elastic element541is connected to the sliding column53, a second end of the first elastic element541is connected to the piston rod of the drive element542, and a telescopic direction of the first elastic element541is the first direction; and when the sliding column53is in the first state, the drive element542drives the first elastic element541to be compressed.

By adopting the above technical solution, when using the material testing machine for the collision test, the control head531is adjusted first to be placed in the fixing groove521, so that the sliding column53is in the first state; then the piston rod of the drive element542is shortened, thereby driving the first elastic element541to be compressed; then the position of the control head531is adjusted, so that the control head531moves into the sliding groove522, and the first elastic element541extends, thereby driving the sliding column53to move in the first direction, and the control head531slides in the sliding groove522along the first direction, so as to drive the first testing element6to move along the first direction.

It should be noted that, the collision device5can adjust a compression amount of the first elastic element541by adjusting the length of the piston rod, so that the moving speed of the sliding column53in the first direction can be adjusted through the adjusting assembly54and thus the moving speed of the first testing element6can be adjusted, to obtain the collision results at different speeds, so as to make the results of the material collision test more accurate; and in the embodiment of the present application, the collision force of the collision device5can be adjusted by changing the size of the diameter of the first elastic element in the test, so that the advantage of controllable and adjustable collision force during the test can be realized, which makes up for the blank of the existing technology.

Referring toFIGS.5-7, in an embodiment of the present application, exemplarily, the collision device5further includes a rebound assembly55, and the rebound assembly55includes a rebound element551and a second elastic element552; the rebound element551is connected to the piston rod of the drive element542and slidably arranged on the mounting seat52along the first direction; the rebound element551is cylindrical, and an opening of the rebound element551faces the mounting substrate51; the sliding column53and the first elastic element541are both arranged on an inner side of the rebound element551, the first elastic element541is connected to the rebound element551; a first end of the second elastic element552is connected to the mounting substrate51, and a second end of the second elastic element552is connected to the on the rebound element551, and a telescopic direction of the second elastic element552is the first direction.

By adopting the above technical solution, when the piston rod of the drive element542is shortened to drive the first elastic element541to be compressed, the rebound element551compresses the second elastic element552, so that the second elastic element552is compressed; when the control head531slides from the fixing groove521into the sliding groove522, the sliding column53moves in the first direction, and at this time, the sliding column53passes through the second elastic elements552and the second elastic element552is stretched, thereby driving the rebound element551to reset.

The first fixing element2and the mounting mode between the first fixing element2and the pressure sensor43will be described below with reference toFIGS.7and8. Exemplarily, the first fixing element2includes a first fixing portion21, a first clamping plate22, a second clamping plate23and a driving screw24; the first clamping plate22is fixedly mounted to the first fixing portion21, the second clamping plate23is arranged opposite to the first clamping plate22, and is slidably mounted to the first fixing portion21along the direction close to or away from the first clamping plate22; the driving screw24is threaded to the first fixing portion21, and the driving screw24is rotatably connected to the second clamping plate23, so that the distance between the second clamping plate23and the first clamping plate22can be adjusted by using the driving screw24.

By adopting the above technical solution, when using the first fixing element2to clamp the first testing element6, the first testing element6is placed between the first clamping plate22and the second clamping plate23, and then the driving screw24is rotated, so that the driving screw24drives the second clamping plate23to move toward the direction close to the first clamping plate22, thereby clamping the first testing element6.

Referring toFIG.8, considering that the first testing element6can be set in various shapes, in an embodiment of the present application, exemplarily, a first clamping block221is provided on the first clamping plate22, and correspondingly, a second clamping block231is provided on the second clamping plate23; the first clamping block221and the second clamping block231are used cooperatively and are arranged on a side where the first clamping plate22and the second clamping plate23are close to each other, so that the first clamping block221and the second clamping block231clamp the first testing element6tightly, which makes the fixing effect of the first fixing element2on the first testing element6better. By using the first clamping block221and the second clamping block231to cooperate, the fixing element2can clamp and fix the first testing element6through one or more of a point contact, a line contact and a surface contact As for the way in which the first clamping block221is mounted to the first clamping plate22and the way in which the second clamping block231is mounted to the second clamping plate23, they can be implemented in various ways, such as welding or bolting, and is not further limited in the present application.

By adopting the above technical solution, when the first testing element6is clamped by the first fixing element2, the first clamping block221and the second clamping block231are used cooperatively, so that the first testing element6can be fixed, and the first testing elements6in various shapes, such as cylindrical or spherical, can be clamped, which makes the use of the first fixing element2more convenient.

It should be noted that, in an embodiment of the present application, both the first fixing element2and the second fixing element3adopt a flexible clamping structure, so that the clamping force of the first fixing element2to the first testing element6and the clamping force of the second fixing element3to the second testing element7can be controlled and adjusted, so as to solve an inaccuracy problem of the test parameters of the frictional wear test and the collision test caused by an unstable clamping force.

Continuing to refer toFIG.8, in an embodiment of the present application, exemplarily, the first clamping plate22and the second clamping plate23are arranged in the third direction; a side of the pressure sensor43away from the sliding column53is connected to the first fixing portion21, so that the first fixing element2can be mounted to the sliding column53through the pressure sensor43, which also makes the detection effect of the pressure sensor43more accurate.

It is easy to understand that the pressure sensor43can be rotatably connected to the sliding column53, so that the pressure sensor43does not rotate together with the sliding column53when the sliding column53rotates; or the pressure sensor43can also be fixedly mounted to the sliding column53, so that the pressure sensor43is driven to rotate when the sliding column53rotates. At this time, a wire for supplying power to the pressure sensor43or for communication needs to be made of a soft material, so as to avoid the influence of the wire on the rotation process of the pressure sensor43.

To sum up, when using the material testing machine to conduct the frictional wear test, the position of the connecting seat13is adjusted so that the connecting seat13drives the first testing element6to slide in the first direction, the first testing element6abuts against the second testing element7, and the pressure sensor43can detect the pressure between the first testing element6and the second testing element7, and thus the pressing force of the first testing element6to the second testing element7can be adjusted; the connecting seat13is arranged in the first position and is fixed relative to the machine body1, and the first testing element6is fixed to the machine body1in the first direction, but can slide on the connecting seat13along the second direction; at this time, the vibration element14drives the second fixing element3to vibrate, so as to drive the first fixing element2to slide on the connecting seat13along the second direction, and at this time, the first testing element6slides on the second testing element7, the friction force sensor41detects the friction force between the first testing element6and the second testing element7, and the sound sensor42detects the noise generated due to the friction between the first testing element6and the second testing element7, and records the peak value of the sound wave, so as to complete the material frictional wear test.

When using the material testing machine to conduct a collision test, the position of the connecting seat13is adjusted so that the connecting seat13drives the first testing element6to slide along the first direction, where there is a gap between the first testing element6and the second testing element7, and then the collision device5drives the first fixing element2to move in the first direction, so that the first testing element6collides with the second testing element7; the pressure sensor43detects the collision force generated when the first testing element6collides with the second testing element7, so as to conduct the material collision test. Therefore, the material testing machine can be applied to both the material frictional wear test and the material collision test, which solves the problem that the function of the testing equipment is relatively single.

Other embodiments of the present application will readily conceived by those skilled in the art upon consideration of the specification and practice of the present application disclosed herein. The present application is intended to cover any variations, uses or adaptive changes of the present application that follow the general principle of the present application and include common knowledge or conventional techniques in the technical field not disclosed in the present application. The description and embodiments are to be regarded as exemplary only, and the true scope and spirit of the present application are indicated by the following claims.

It should be understood that the present application is not limited to the precise structures described above and shown in the accompanying drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the application is limited only by the appended claims.