CN219870649U - Material high-speed tensile mechanical testing device - Google Patents

Abstract

The utility model relates to a high-speed tensile mechanical testing device for materials, which comprises electronic control equipment, a high-speed tensile clamp, a middle cross beam lifting device, a sensor system and a transmission system, wherein the electronic control equipment is in control connection with the transmission system, the middle cross beam lifting device comprises a screw pair, the bottom end of the screw pair is in transmission connection with the transmission system, the middle cross beam is in threaded connection with the screw pair through a threaded hole, the high-speed tensile clamp is vertically arranged in the middle part of the middle cross beam lifting device, the high-speed tensile clamp comprises a servo motor, an electric cylinder, an upper clamp and a lower clamp, the servo motor is arranged on the electric cylinder, the electric cylinder is arranged on the middle cross beam, a piston rod of the electric cylinder is connected with the upper clamp, the lower clamp is in tension connection with the sensor system, and the sensor system is fixed at the top of a box-type base. The device breaks through the upper limit of the stretching speed and effective stretching displacement, solves the problem of high-speed stretching mechanical test of the solid propellant with high elongation, and provides technical support for propellant development.

Description

Material high-speed tensile mechanical testing device

Technical Field

The utility model relates to the field of mechanical property testing of materials, in particular to a high-speed tensile mechanical testing device of materials.

Background

At present, a standard static material testing machine is mainly used for researching mechanical properties of materials at low strain rates, hopkinson is mainly used for researching mechanical properties of materials at high strain rates, and fewer testing devices are used for researching the mechanical properties of materials at the strain rates. The solid propellant is a viscoelastic material widely applied to various missiles and spacecrafts, and the mechanical property of the solid propellant is strongly dependent on the influence of external temperature and loading strain rate. Therefore, the research on the mechanical properties of the propellant at different temperatures and different stretching rates has very important significance for analyzing the structural integrity of the grain. The device is limited by the influence of a high-speed stretching (medium strain rate) mechanical testing device, and when researchers at home and abroad analyze and research the mechanical properties of the solid propellant under different loading conditions, the device lacks mechanical property test data under the medium strain rate and has strong limitation.

In the prior art, research on a test device and a test method for high-speed stretching of a solid propellant is not carried out, the problem of high-speed stretching mechanical testing of a certain solid propellant cannot be effectively solved, and the structural integrity of a grain of a certain type of missile solid rocket engine under the ignition transient condition cannot be ensured.

Disclosure of Invention

The utility model aims to solve the problems in the prior art, and provides a high-speed tensile mechanical testing device for materials, wherein the upper limit of the testing speed of the device can reach 24000mm/min, the effective tensile displacement can reach 520mm, the mechanical testing precision is high, the applicable propellant variety is wide, the problem of high-speed tensile testing of solid propellant is effectively solved, and technical support is provided for propellant development.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a high-speed tensile mechanical testing device for a material, comprising: the device comprises electronic control equipment, a high-speed stretching clamp driven by an electrified cylinder, a box-type base, a middle cross beam lifting device, a sensor system and a transmission system; the electronic control equipment is in control connection with the transmission system; the transmission system is arranged in the box-type base; the middle beam lifting device is door-shaped and comprises a screw pair; the bottom end of the screw rod pair is in transmission connection with the transmission system, the middle cross beam is arranged at the upper part of the middle cross beam lifting device, and two ends of the middle cross beam are respectively provided with a threaded hole and are in threaded connection with the screw rod pair through the threaded holes; the high-speed stretching clamp driven by the electric cylinder is vertically arranged in the middle of the middle cross beam lifting device and comprises a servo motor, an electric cylinder, an upper clamp and a lower clamp, the servo motor is arranged on the electric cylinder, the electric cylinder is arranged on the middle cross beam through a middle mounting hole of the middle cross beam, a piston rod of the electric cylinder is connected with the upper clamp, and the lower clamp is connected with the sensor system in a tensile mode; the sensor system is fixed on top of the box base.

Further, the middle cross beam lifting device further comprises: a guide bar and an upper cross beam; the guide bar is arranged in parallel with the screw pair, and the top end of the guide bar and the top end of the screw pair are connected with the upper cross beam; the guide bars penetrate through guide sleeves arranged at two ends of the middle cross beam to fix the bottom ends at the top of the box-type base.

Further, the upper jig includes: the clamping device comprises a clamp joint, an upper clamp connecting rod, an upper clamp body, an upper clamp connecting rod lock nut and a spring rod assembly; the clamp connector is arranged on a piston rod of the electric cylinder and is in locking connection with the upper clamp connecting rod through the upper clamp connecting rod locking nut; the bottom of the upper clamp connecting rod is connected with the upper clamp body; the spring rod assembly is arranged on the outer side of the upper clamp body.

Further, the lower clamp includes: a lower clamp connecting rod, a lower clamp body and a lower clamp connecting rod lock nut; the lower clamp connecting rod is connected with the sensor system in a pulling way through a lower clamp connecting rod locking nut; the lower clamp body is arranged at the top end of the lower clamp connecting rod.

Further, the upper clamp body includes: an upper chuck and two upper force application columns; the two upper force application columns are columns and are arranged in the upper chuck in parallel along the horizontal direction.

Further, the lower clamp body includes: a lower chuck and two lower force application columns; the two lower force application columns are columns and are arranged in the lower chuck in parallel along the horizontal direction.

Further, the box-type base includes: a top plate, a coaming, a bottom plate and a bottom plate support; the upper part of the coaming is connected with the top plate, and the bottom of the coaming is connected with the bottom plate; the bottom plate support posts are arranged at four corners of the bottom plate.

Further, the sensor system includes: the device comprises a connector, a force sensor, a sensor fixing seat and a sensor locking nut, wherein the force sensor is in tensile connection with a high-speed stretching clamp driven by the electrified cylinder through the connector; the force sensor is in locking connection with the sensor fixing seat through the sensor locking nut; the sensor fixing seat is fixed at the top of the box-type base.

Further, the transmission system includes: the device comprises a driven belt pulley, a synchronous belt, a motor, a speed reducer and a driving belt pulley; the two driving pulleys are symmetrically arranged at the top of the inside of the box-type base; the two driven pulleys are respectively connected with the bottom ends of the two screw rod pairs in a power mode and are respectively connected with the corresponding driving pulleys in a transmission mode through the synchronous belt; the speed reducer is arranged at the bottom of the inside of the box-type base and is in power connection with the driving belt pulley; the motor is in driving connection with the speed reducer.

Compared with the prior art, the utility model has the following advantages:

the utility model adopts the motor and the electric cylinder as the power of the clamp, greatly improves the pulling speed and the strength of the clamp, breaks through the upper limit of the stretching speed of the traditional material, and effectively solves the problem of high-speed stretching test of the solid propellant.

Secondly, the sensor system is added, so that the tension data of the whole material in the high-speed stretching experiment process can be monitored in real time and data can be transmitted, an experimenter can clearly know the data in the experiment process, adjustment is properly performed, and the mechanical test precision is high.

Thirdly, the position of the transmission system and the position of the middle cross beam are controlled by the electronic controller, so that the utility model has the functions of limiting protection, overload protection, emergency stop and the like, and accidents are prevented in various aspects, thereby achieving the purpose of comprehensively ensuring the safety of experiments, reducing the failure rate of the experiments and greatly reducing the experiment cost.

Fourth, the design of the utility model has no excessive limitation, can carry out high-speed stretching experiments on most propellants, and has wide applicable propellant varieties.

Drawings

FIG. 1 is a schematic diagram of a high-speed tensile mechanical testing device for a material according to the present utility model;

FIG. 2 is a schematic diagram of a main frame structure of a device for testing high-speed tensile mechanics of materials according to the present utility model;

FIG. 3 is a schematic diagram of a high-speed stretching clamp driven by an electrified cylinder of the high-speed stretching mechanical testing device for materials;

FIG. 4 is a schematic diagram of a sensor system configuration of a high-speed tensile mechanical testing device for materials according to the present utility model;

FIG. 5 is a schematic diagram of the transmission system structure of the high-speed tensile mechanical testing device of the material of the present utility model;

FIG. 6 is a schematic illustration of a 13mm reserved clamp structure for a propellant sample in an embodiment of the present utility model;

FIG. 7 is a graph of high energy solid propellant force versus displacement for a model number at a draw rate of 24000mm/min in an embodiment of the utility model;

FIG. 8 is a stress-strain plot for a model of high energy solid propellant at a tensile rate of 24000mm/min in an embodiment of the present utility model;

FIG. 9 is a graph of displacement versus time for an embodiment of the present utility model with a charged cylinder driven high speed stretching clamp accelerating to 24000 mm/min.

Reference numerals illustrate: 1. a main frame; 7. a box-type base; 130. a middle cross beam lifting device; 10. an electronic control device; 11. an upper cross beam; 12. a top cover; 13. a middle cross beam; 14. a screw pair; 15. a side cover; 16. a guide bar; 17. a top plate; 18. coaming plate; 19. a bottom plate; 190. a floor support; 2. high-speed stretching clamp driven by electric cylinder; 21. a servo motor; 22. an electric cylinder; 23. a clamp joint; 241. the upper clamp connecting rod lock nut; 25. an upper clamp connecting rod; 26. an upper clamp body; 261. a clamp is arranged; 27. a spring rod assembly; 28. a lower clamp body; 2801. an upper chuck; 2802. a lower chuck; 2811. a force application column is arranged on the upper part; 2822. a lower force application column; 282. a lower clamp; 29. a lower clamp link; 242. a lower clamp connecting rod lock nut; 3. a sensor system; 31. a joint; 32. a force sensor; 243. a sensor lock nut; 34. a sensor holder; 4. a transmission system; 41. a driven pulley; 42. a synchronous belt; 43. a motor; 44. a speed reducer; 45. a driving pulley; 46. a tensioning mechanism; 5. a propellant sample; 51. an arc-shaped part; epsilon ₀ Elongation in dry running; epsilon _mr Collecting the maximum force elongation; epsilon _br And collecting the elongation at break.

Detailed Description

The present utility model will be described in further detail below with reference to the drawings and detailed description for the purpose of enabling those skilled in the art to understand the utility model better.

Example 1

Referring to fig. 1, the embodiment provides a high-speed tensile mechanical testing device for materials, which comprises an electronic control device 10, a high-speed tensile fixture 2 driven by a charged cylinder, a box-type base 7, a middle cross beam 13, a middle cross beam lifting device 130, a sensor system 3 and a transmission system 4; the electronic control device 10 is in control connection with the transmission system 4; the transmission system 4 is arranged inside the box-type base 7; the middle beam lifting device 130 is a door type, and the middle beam lifting device 130 comprises a screw pair 14; the bottom end of the screw rod pair 14 is in transmission connection with the transmission system 4, the middle cross beam 13 is arranged on the upper part of the middle cross beam lifting device 130, and two ends of the middle cross beam 13 are respectively provided with a threaded hole and are in threaded connection with the screw rod pair 14 through the threaded holes; the high-speed stretching clamp 2 driven by the electric cylinder is vertically arranged in the middle of the middle beam lifting device 130, the high-speed stretching clamp 2 driven by the electric cylinder comprises a servo motor 21, an electric cylinder 22, an upper clamp 261 and a lower clamp 282, the servo motor 21 is arranged on the electric cylinder 22, the electric cylinder 22 is arranged on the middle beam 13 through a middle mounting hole of the middle beam 13, a piston rod of the electric cylinder 22 is connected with the upper clamp 261, and the lower clamp 282 is in tensile connection with the sensor system 3; the sensor system 3 is fixed on top of the box base 7.

The electronic control equipment controls the starting and stopping of the transmission system, after the transmission system is started, a screw rod pair in the middle beam lifting device is driven to adjust the position of the middle beam in a vertical movement mode through threads, the middle beam drives a high-speed stretching clamp driven by the electric cylinder to be adjusted to a proper position and then stops, and then the rotation motion of the servo motor is converted into the linear motion of the electric cylinder, namely, the servo motor is used for driving an upper clamp installed on a piston rod of the electric cylinder to quickly rise, meanwhile, a lower clamp is connected with a sensor system, and the sensor system is fixed on the outer side of a top plate of the box-type base.

The propellant sample 5 is placed between the upper and lower jigs, both ends are simultaneously clamped by the upper and lower jigs, the position of the lower jig is unchanged, and the propellant sample is stretched when the upper jig is rapidly raised.

Further, the sensor system is a force sensor, and the force test is performed when high-speed stretching is performed.

The utility model has the closed-loop control modes of stress, displacement and the like, can control the stretching of the propellant sample under different condition settings, and can more accurately confirm and control the stretching condition of the propellant sample. Simultaneously, the device has two transmission modes, including screw transmission and electric cylinder transmission, so as to adapt to different requirements.

Furthermore, the utility model also adopts a microcomputer to control the whole test process, dynamically displays the force value, the displacement value, the deformation value and the test speed in real time, intuitively displays the test process in a data form, enables an experimenter to observe the test data in all directions and the whole process, captures the test loopholes through the test data, and avoids errors possibly existing in many manual observations. Has data storage and curve output functions. The experimental result is directly output in a curve form after the experiment and all data in the experimental process are reserved, so that an experimenter can intuitively see the change condition through the curve, and meanwhile, the stored experimental data can support the data to be called and compared in the next experiment so as to carry out comparison.

Referring to fig. 2, the middle beam lifting device 130 further includes: a guide bar 16 and an upper cross beam 11; the guide bar 16 is arranged in parallel with the screw pair 14, and the top end of the guide bar 16 and the top end of the screw pair 14 are connected with the upper cross beam 11; the guide bar 16 passes through guide sleeves arranged at two ends of the middle cross beam 13 to fix the bottom end at the top of the box-type base 7.

The box base 7 includes: top plate 17, coaming 18, bottom plate 19, bottom plate posts 190; the upper part of the coaming 18 is connected with the top plate 17, and the bottom is connected with the bottom plate 19; the floor posts 190 are disposed at four corners of the floor 19.

Further, a side cover 15 is further provided on the outer side of the screw pair and the guide bar for protecting the screw pair and the guide bar. A top cover 12 is also provided at the top end of the side cover for connecting the side cover to the upper cross member.

The main frame adopts a high-strength beam to fix an upper beam and a workbench surface to form a high-rigidity portal frame structure, the middle beam is driven by a preloaded ball screw to move, and the beam is guided by a beam with high vibration and impact resistance and high positioning precision.

Referring to fig. 3 and 6, the upper jig 261 includes: the clamp joint 23, the upper clamp connecting rod 25, the upper clamp body 26, the upper clamp connecting rod locking nut 241 and the spring rod assembly 27; the clamp connector 23 is mounted on a piston rod of the electric cylinder 22, and the clamp connector 23 is in locking connection with the upper clamp connecting rod 25 through the upper clamp connecting rod locking nut 241; the bottom of the upper clamp connecting rod 25 is connected with an upper clamp body 26; the spring bar assembly 27 is mounted outside the upper clamp body 26.

The upper clamp connecting rod lock nut further strengthens the stability of the clamp joint, the elastic rod assembly is arranged on the outer side of the upper clamp body and is used for further locking the upper clamp body after the propellant sample is put into the upper clamp body for clamping, and the upper clamp body is prevented from loosening or leaving gaps in the high-speed stretching process to cause accidental deformation of the propellant sample, so that unnecessary resource waste is caused.

The lower clamp 282 includes: a lower clamp link 29, a lower clamp body 28, and a lower clamp link lock nut 242; the lower clamp link 29 is in tension connection with the sensor system 3 through the lower clamp link lock nut 242; the lower clamp body 28 is mounted on top of the lower clamp link 29.

The lower clamp connecting rod lock nut further strengthens connection with the sensor system, ensures stability, and simultaneously ensures that the sensor system can accurately measure tension in the experiment process when performing high-speed tension experiments.

The upper clamp body 26 includes: an upper collet 2801, two upper apply posts 2811; the two upper force application columns are columns and are arranged in the upper chuck in parallel along the horizontal direction.

The lower clamp body 28 includes: a lower collet 2802, two lower apply columns 2812; the two lower force application columns are columns and are arranged in the lower chuck in parallel along the horizontal direction.

The upper chuck and the lower chuck simultaneously clamp the propellant sample, and the upper force application column and the lower force application column clamp the sample to stretch and play a role in skid resistance.

Further, the propellant sample is a fixed shape which is produced in a prescribed manner, and the upper force application column and the lower force application column are both columnar and can be attached to the arc-shaped part 51 of the sample.

Before the tensile test, the arc-shaped portions 51 of the two lower force applying columns in the lower clamp joint are required to be kept at an initial distance of 13mm from the propellant sample, so that a sufficient acceleration distance is left for the clamp to accelerate to a specified speed in a dry running mode, and an ideal experimental effect is achieved.

Referring to fig. 4, the sensor system 3 includes a joint 31, a force sensor 32, a sensor mount 34, and a sensor lock nut 243.

The force sensor 32 is in tensile connection with the high-speed stretching clamp 2 driven by the electrified cylinder through the joint 31; the force sensor 32 is in locking connection with the sensor fixing seat 34 through the sensor locking nut 243; the sensor fixing seat 34 is fixed on the top of the box-type base 7.

The main purpose that sensor system set up is that the measurement is in the tensile strength size of each stage of material in the experimentation to reach the purpose that can let the experimenter observe the pulling force change in the experimentation in whole journey.

Referring to fig. 5, the transmission system 4 includes a driven pulley 41, a timing belt 42, a motor 43, a speed reducer 44, and a driving pulley 45;

the two driving pulleys are symmetrically arranged at the top of the inside of the box-type base; the two driven pulleys 41 are respectively and dynamically connected to the bottom ends of the two screw pairs 14, and are respectively and drivingly connected with the corresponding driving pulleys 45 through the synchronous belt 42; the speed reducer 44 is arranged at the bottom of the box-type base and is in power connection with the driving belt pulley 45; the motor 43 is in driving connection with the speed reducer 44.

The transmission system is controlled by a motor as a power source through a speed reducer, and is connected with a driving belt pulley to control the driving belt pulley to rotate, the driving belt pulley drives a driven belt pulley to rotate through a wound synchronous belt, the driven belt pulley is arranged at the bottom end of a screw pair, the driven belt pulley rotates and drives the screw pair to rotate, a middle cross beam is in threaded connection with the screw pair and moves up and down through threaded rotation, and therefore the purpose of adjusting the lifting position of the screw pair is achieved.

Furthermore, the utility model also provides a tensioning mechanism 46 between the two driving pulleys, which is arranged on the inner side of the top plate, can control the tension of the synchronous belt, reduce the energy waste and prolong the service life of the transmission system.

The transmission system adopts the imported full-digital servo motor and the servo unit to improve the performance, and simultaneously selects the high-precision high-rigidity planetary gear reducer and the circular arc tooth synchronous belt to increase friction, so that the efficiency of the traditional system is improved, and unnecessary resource waste is reduced.

The utility model carries out the high-speed tensile mechanical test of the solid propellant, which comprises the following steps:

(1) Before starting up, checking whether all parts of the machine are intact and at correct positions, and after starting up, ensuring the operation safety, wherein the safety operation rules are strictly required to be strictly followed;

(2) Manufacturing a propellant sample according to the requirement, accurately measuring the size and recording;

(3) Turning on a power supply of the testing machine, and preheating for at least 15min;

(4) Adjusting the middle cross beam to enable the high-speed stretching clamp driven by the electrified cylinder to be at a proper position, and then setting a safety limit card;

(5) Installing a special upper clamp body and a special lower clamp body for testing unidirectional stretching mechanical properties of the solid propellant, and adjusting the distance between the upper clamp body and the lower clamp body;

(6) Clamping a sample, ensuring that a 13mm accelerating space exists between the arc-shaped part at the lower end of the sample and a force application column of a lower clamp body, ensuring that a high-speed stretching clamp driven by a charged cylinder is accelerated to a specified speed in a dry running mode, and then loading at a constant speed;

(7) Inputting sample information and test parameters, and starting a test;

(8) After the data acquisition is finished, the result curve is processed, and the true maximum force elongation and the true elongation at break are obtainedRate epsilon _b The calculation formula is as follows:

ε _m ＝ε _mr -ε ₀

ε _b ＝ε _br -ε ₀

(9) Abnormality judgment and processing requirements of test result data: a) If the sample has defects such as impurities, visible air holes and the like on the section, discarding the sample data; b) Judging abnormal data by adopting a Grabbs test method; c) If the tensile strength or elongation of a certain sample is abnormal data, all data of the sample are discarded; d) The effective data of the same group test is not less than 4 groups

(10) And (5) after the experiment is completed, cleaning the waste medicines.

The main mechanical principle is as follows: the motor and the speed reducer are matched to drive the synchronous belt, the synchronous belt drives the screw pair to rotate, the purpose of up-and-down adjustment of the middle cross beam is achieved, and the middle cross beam is adjusted up-and-down to drive the high-speed stretching clamp driven by the charged cylinder arranged on the middle cross beam to be adjusted up-and-down to a proper position; the rotary motion of the servo motor is converted into linear motion of the electric cylinder, and the electric cylinder drives the upper clamp body to accelerate to a specified speed, and then the clamp body clamps the propellant sample to complete the tensile test. And finally outputting a result curve, and obtaining required result parameters after data processing.

Example two

Acceleration test of high-speed tensile mechanical testing device for materials

As shown in fig. 9, the displacement time curve of the upper clamp body speed accelerated from 0 to 24000mm/min is calculated, and the slope of the curve can be obtained: the time required for accelerating the speed of the upper clamp body from 0 to 24000mm/min is 0.16s, and the accelerating displacement is 12.7mm. Thus, when clamping the specimen, an acceleration distance of 13mm is reserved, which is sufficient for the equipment to accelerate to a specified stretching rate in a dry run, and then the specimen is clamped and stretched to break. The curves of fig. 7 and 8 reflect this phenomenon obviously, and the initial horizontal segment of the curve is the dry run acceleration phase. The acceleration distance of 13mm is sufficient for the device to accelerate to maximum speed, and during the test, the reserved acceleration distance of 13mm fully meets the tensile test requirements at any speed.

Example III

The utility model tests the mechanical properties of a certain high-energy solid propellant at different stretching rates.

TABLE 1 mechanical Properties of certain high-energy solid propellant at different stretching Rate

As can be seen from table 1: in the mechanical test of a certain high-energy solid propellant under different stretching rates, the mechanical property indexes show a better time-temperature equivalent principle, the variation coefficients are all smaller than 10%, the variation coefficients belong to a small variation range, the system has higher test precision, and the requirement of the national military standard on the mechanical property test precision is met. The novel high-energy solid propellant high-speed stretching system completely meets the expected use requirement.

Comprehensive example analysis shows that the high-speed tensile testing device for the material has the advantages that the testing precision, the tensile rate and the effective stroke of the high-speed tensile testing device completely meet the mechanical property testing requirement of high-energy solid propellant with large elongation.

Having described embodiments of the utility model, the foregoing description is illustrative, not exhaustive, and not limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the various embodiments described. Therefore, the protection scope of the present utility model should be subject to the protection scope of the claims.

In order to make the implementation objects, technical solutions and advantages of the present utility model more clear, the technical solutions in the present embodiment are described in more detail below with reference to the accompanying drawings in the present embodiment. The described embodiments are some, but not all, embodiments of the utility model. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to fall within the scope of the utility model. Embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.

In the description of the present utility model, it is to be understood that, unless otherwise indicated, the meaning of "a plurality" is two or more; the terms "center," "longitudinal," "transverse," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used for convenience in describing and simplifying the description based on the orientation or positional relationship shown in the drawings, and do not denote or imply that the devices or elements being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the scope of the utility model. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present utility model can be understood as appropriate by those of ordinary skill in the art.

The above embodiments are provided to illustrate the technical concept and features of the present utility model, and are intended to enable those skilled in the art to understand the present utility model and implement the same according to the present utility model, not to limit the scope of the present utility model. All equivalent changes or modifications made in accordance with the spirit of the present utility model should be construed to be included in the scope of the present utility model.

Claims (10)

1. A high-speed tensile mechanical testing device for a material, comprising:

the device comprises electronic control equipment (10), a high-speed stretching clamp (2) driven by an electric cylinder, a box-type base (7), a middle cross beam (13), a middle cross beam lifting device (130), a sensor system (3) and a transmission system (4);

the electronic control device (10) is in control connection with the transmission system (4); the transmission system (4) is arranged inside the box-type base (7); the middle beam lifting device (130) is a door type, and the middle beam lifting device (130) comprises a screw pair (14); the bottom end of the screw rod pair (14) is in transmission connection with the transmission system (4), the middle cross beam (13) is arranged at the upper part of the middle cross beam lifting device (130), two ends of the middle cross beam (13) are respectively provided with a threaded hole, and the two ends of the middle cross beam are in threaded connection with the screw rod pair (14) through the threaded holes; the high-speed stretching clamp (2) driven by the electric cylinder is vertically arranged in the middle of the middle beam lifting device (130), the high-speed stretching clamp (2) driven by the electric cylinder comprises a servo motor (21), an electric cylinder (22), an upper clamp (261) and a lower clamp (282), the servo motor (21) is arranged on the electric cylinder (22), the electric cylinder (22) is arranged on the middle beam (13) through a middle mounting hole of the middle beam (13), a piston rod of the electric cylinder (22) is connected with the upper clamp (261), and the lower clamp (282) is in tensile connection with the sensor system (3); the sensor system (3) is fixed on top of the box-type base (7).

2. The device for high-speed tensile testing of a material according to claim 1, wherein said middle cross beam elevating means (130) further comprises:

a guide bar (16) and an upper cross beam (11);

the guide bar (16) is arranged in parallel with the screw pair (14), and the top end of the guide bar (16) and the top end of the screw pair (14) are connected with the upper cross beam (11); the guide bar (16) passes through guide sleeves arranged at two ends of the middle cross beam (13) to fix the bottom end at the top of the box-type base (7).

3. The device for high-speed tensile mechanical testing of a material according to claim 1, characterized in that said upper clamp (261) comprises:

the clamping device comprises a clamp connector (23), an upper clamp connecting rod (25), an upper clamp body (26), an upper clamp connecting rod locking nut (241) and a spring rod assembly (27);

the clamp connector (23) is arranged on a piston rod of the electric cylinder (22), and the clamp connector (23) is in locking connection with the upper clamp connecting rod (25) through the upper clamp connecting rod locking nut (241); the bottom of the upper clamp connecting rod (25) is connected with the upper clamp body (26); the spring rod assembly (27) is arranged outside the upper clamp body (26).

4. A high-speed tensile mechanical testing device for a material according to claim 3, characterized in that said upper clamp body (26) comprises:

an upper chuck (2801) and two upper force application columns (2811);

the two upper force application columns (2811) are columns, and the two upper force application columns (2811) are installed in the upper chuck (2801) in parallel along the horizontal direction.

5. The high-speed tensile mechanical testing device of a material according to claim 1, wherein the lower clamp (282) comprises:

a lower clamp connecting rod (29), a lower clamp body (28) and a lower clamp connecting rod lock nut (242);

the lower clamp connecting rod (29) is in tensile connection with the sensor system (3) through the lower clamp connecting rod locking nut (242); the lower clamp body (28) is arranged at the top end of the lower clamp connecting rod (29).

6. The high-speed tensile mechanical testing device for a material according to claim 5, wherein said lower clamp body (28) comprises:

a lower chuck (2802) and two lower force application columns (2812);

the two lower force application columns (2812) are columns, and the two lower force application columns (2812) are installed in the lower clamping head (2802) in parallel along the horizontal direction.

7. The device according to claim 1, characterized in that said box-type base (7) comprises:

a top plate (17), a coaming (18), a bottom plate (19), and a bottom plate support (190);

the upper part of the coaming (18) is connected with the top plate (17), and the bottom is connected with the bottom plate (19); the base plate support posts (190) are arranged at four corners of the base plate (19).

8. The device according to claim 1, characterized in that the sensor system (3) comprises:

the sensor comprises a joint (31), a force sensor (32), a sensor fixing seat (34) and a sensor locking nut (243);

the force sensor (32) is connected with the high-speed stretching clamp (2) driven by the electrified cylinder in a pulling way through the joint (31); the force sensor (32) is in locking connection with the sensor fixing seat (34) through the sensor locking nut (243); the sensor fixing seat (34) is fixed at the top of the box-type base (7).

9. The device according to claim 1, characterized in that the transmission system (4) comprises:

a driven pulley (41), a synchronous belt (42), a motor (43), a speed reducer (44) and a driving pulley (45);

the two driven pulleys (41) are respectively connected with the bottom ends of the two screw rod pairs (14) in a power mode, and are respectively connected with the corresponding driving pulleys (45) in a transmission mode through the synchronous belt (42); the speed reducer (44) is in power connection with the driving belt wheel (45); the motor (43) is in driving connection with the speed reducer (44).

10. The device for high-speed tensile testing of a material according to claim 9, wherein said transmission system (4) further comprises:

a tensioning mechanism (46).