Multifunctional tension-compression type Hopkinson equipment

Abstract

The utility model relates to the technical field of power and material discipline testing, and discloses multifunctional tension and compression type Hopkinson equipment which comprises a main rack, a device extension rack, a pull rod launching device, a buffer device, an incident rod piece, a projection rod piece and an absorption rod piece, a guide rail base is arranged on the main rack and the device extension rack, a guide rail is arranged on the guide rail base, and a plurality of guide rails are arranged on the guide rail base. A buffer device is arranged at the other end of the guide rail; an incidence rod piece, a projection rod piece and an absorption rod piece are sequentially arranged between the pull rod launching device and the buffer device on the guide rail; and an elastic rod speedometer is arranged at a gun tube opening of the pull rod launching device and is fixedly connected to the guide rail working table. The dynamic tensile loading device can be combined and effectively used for dynamic tensile loading in the material research rod system test change operation process, is convenient to operate and good in reliability, and can remarkably improve the experiment efficiency. The cost is greatly reduced, the test piece is more convenient to replace, and meanwhile, the test piece and experiment rod materials are also saved.

Description

Technical Field

[0001] The utility model relates to the technical field of power and material discipline testing, in particular to a multi-functional tensile and compressive Hopkinson device. Background Technique

[0002] At present, in view of the simple operation and strong repeatability of using gas as the medium in the Hopkinson bar experiment, pneumatic acceleration has become the general power source of the Hopkinson bar experimental device. With the continuous development of material research towards higher strain rates, it is required that the experimental equipment provide greater power. Increasing the gas pressure is an application method, but it also requires improving the safety operation standard of the entire experimental device, and comprehensive improvement of the overall experimental device is needed. In addition, only the compression and tensile properties of materials are not enough in the process of material mechanics research. The mechanical properties of materials often lose their original functions or even completely fail due to factors such as shape and structure. Therefore, it is necessary to build a multi-functional testing device that can not only study the tensile and compressive properties of materials, but also study the experiments of material component failure and expand mechanical properties.

[0003] Currently, the existing Hopkinson bar experimental devices all have unstable pulse values of test data for tensile and compressive component tests of small-diameter Hopkinson experimental devices due to the rod diameter factor. If a large-diameter Hopkinson experimental device is used only to study the constitutive relationship of materials, it will cause unnecessary process and resource consumption in the test application. Content of the Utility Model

[0004] To overcome the deficiencies of the prior art, the purpose of the utility model is to provide a multi-functional tensile and compressive Hopkinson device.

[0005] To achieve the above-mentioned invention purpose, the technical solution adopted by the utility model is:

[0006] A multi-functional tensile and compressive Hopkinson device, comprising: a main platform frame 1, a device extension platform frame 10, a pull rod launching device 12, a buffer device 9, an incident bar 5, a projectile bar 7, and an absorption bar 8. A guide rail base 11 is arranged on the main platform frame 1 and the device extension platform frame 10, a guide rail is arranged on the guide rail base 11, a pull rod launching device 12 is arranged at one end of the guide rail, and a buffer device 9 is arranged at the other end of the guide rail; an incident bar 5, a projectile bar 7, and an absorption bar 8 are sequentially arranged between the pull rod launching device 12 and the buffer device 9 on the guide rail; a projectile rod speed measuring instrument 3 is arranged at the muzzle of the gun barrel of the pull rod launching device 12, and the projectile rod speed measuring instrument 3 is fixedly connected to the guide rail workbench surface 12.5.

[0007] A multi-functional tensile and compressive Hopkinson device, wherein the incident bar 5, the projectile bar 7, and the absorption bar 8 are respectively located in the sliding sleeves of the sliding sleeve bar central support frame 4, and each sliding sleeve bar central support frame 4 is fixedly connected to the guide rail workbench surface 12.5.

[0008] A multi-functional tension-compression Hopkinson device, in which a specimen conversion device 6 is arranged between the incident bar 5 and the projectile bar 7, and the specimen conversion device 6 is fixedly connected to the guide rail workbench surface 12.5.

[0009] A multi-functional tension-compression Hopkinson device, on which a multi-functional operation control display platform 2 is arranged on the main frame 1, and the main frame 1 is at the same horizontal height as the horizontal plane at the top of the device extension frame 16.

[0010] Due to the adoption of the above-mentioned technical solutions, the utility model has the following beneficial effects:

[0011] A multi-functional tension-compression Hopkinson device, by using a tension-compression integrated multi-functional Hopkinson device, can provide a new application method for effectively combining the dynamic loading of the test change operation process of the material research rod system. Through the tension-compression integrated test device, including a launching device, an incident bar, a compression transmission bar, a tension transmission bar, a buffer device, a connector and a signal processing system.

[0012] Before the test, connect the connector to the incident bar with an external thread end by threading, insert the air inlet hose in the launching device into the air inlet hole of the incident bar. When conducting a dynamic compression test, clamp the specimen between the incident bar and the compression transmission bar, and generate an air pressure difference through the launching device to push the bullet placed in the cavity of the incident bar to impact the incident bar, generating an incident pulse to conduct dynamic compression loading on the specimen. When conducting a dynamic tension test, connect the specimen with external threads at both ends to the internal threads of the tension transmission bar and the connector, generate an air pressure difference through the launching device to push the bullet placed in the cavity of the incident bar to impact the incident bar, and use the generated pulse to conduct dynamic tension loading on the specimen. This device is convenient to operate and has good reliability, and can significantly improve the experimental efficiency.

[0013] The research and application combination of the tension-compression integrated multi-functional Hopkinson device enables the test specimen and each device of the system to be considered in the same common system. It can not only conduct two experiments of tension and compression respectively, but also conduct multi-functional mechanical tests on Hopkinson bars, and can greatly reduce costs, make the replacement of specimens more convenient, simplify the experimental process further, and significantly improve the efficiency for single and large-volume experiments.

[0014] At the same time, for the research of materials, the smaller the diameter of the experimental bar of the Hopkinson bar, the smaller the diameter of its specimen, and the more uniform the relative force will be, and at the same time, the materials of the specimen and the experimental bar are saved. In addition, due to the fact that the piston in the tension bar launching device will generate impact and rebound after being applied with pressure during the experiment, the experimental interference is effectively improved by the improved ring-shaped cooperation of the test cylinder and the nozzle of the launching piston. Description of the Drawings

[0015] Figure 1It is a schematic structural diagram of a multi-functional tensile and compressive Hopkinson device.

[0016] Figure 2 It is a schematic structural diagram of a launching device.

[0017] In the figure: 1. Main frame, 5. Incident bar, 7. Projectile bar, 8. Absorbing bar, 9. Buffer device, 10. Device extension frame, 11. Guide rail base, 12. Pull rod launching device. Specific implementation mode

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention.

[0019] As Figure 1 、 2 shown, a multi-functional tensile and compressive Hopkinson device includes: a main frame 1, a device extension frame 10, a pull rod launching device 12, a buffer device 9, an incident bar 5, a projectile bar 7, and an absorbing bar 8. A guide rail base 11 is provided on the main frame 1 and the device extension frame 10. A guide rail is provided on the guide rail base 11. A pull rod launching device 12 is provided at one end of the guide rail, and a buffer device 9 is provided at the other end of the guide rail. An incident bar 5, a projectile bar 7, and an absorbing bar 8 are sequentially arranged between the pull rod launching device 12 and the buffer device 9 on the guide rail. A bullet rod speed measuring instrument 3 is provided at the muzzle of the gun barrel of the pull rod launching device 12, and the bullet rod speed measuring instrument 3 is fixedly connected to the guide rail working surface 12.5.

[0020] The incident bar 5, the projectile bar 7, and the absorbing bar 8 are respectively located in the sliding sleeves of the sliding sleeve rod center support frame 4, and each sliding sleeve rod center support frame 4 is fixedly connected to the guide rail working surface 12.5. A specimen conversion device 6 is arranged between the incident bar 5 and the projectile bar 7, and the specimen conversion device 6 is fixedly connected to the guide rail working surface 12.5.

[0021] A multi-functional operation control display platform 2 is provided on the main frame 1, and the horizontal plane of the top of the main frame 1 is at the same height as that of the device extension frame 16. The pull rod launching device 12 includes: a stretching cylinder 12.1, a launching valve body device 12.2, a launching exhaust solenoid valve 12.3, a launching gun barrel 12.4, a guide rail platform 12.5, and a launching conversion device 12.6. A launching conversion device 12.6 is provided on the guide rail platform 12.5. A launching gun barrel 12.4 parallel to the guide rail is provided on the launching conversion device 12.6. A launching valve body device 12.2 is connected to one side of the launching conversion device 12.6. A stretching cylinder 12.1 is provided at one end of the launching valve body device 12.2, and a launching exhaust solenoid valve 12.3 is provided at the other end of the launching valve body device 12.2.

[0022] During use, the structure of the tension cylinder of the new component is adjusted and applied to improve the efficiency of experimental testing work. By replacing the experimental rod diameter on the same working platform, it can adapt to the dynamic loading mechanical response of different experimental testing purposes, and can reduce the interference generated in the experiment. The tension-compression integrated multifunctional device can obtain real tensile or compressive stress-strain curves through the dynamic mechanical performance experiment of testing materials under one-dimensional stress and high strain rate conditions. Combining domain knowledge and comprehensive application, it can predict and evaluate the macroscopic material properties to reveal the origin laws and characteristics of materials.

[0023] The utility model is an experimental device with a buffer device at the tail end on a shared working platform. After the absorption rod of the device is impacted, energy is absorbed through the buffer device at the tail end of the platform. The absorption rod, the tensile experimental rod, and the compressive experimental rod are supported by a rod support device. A projectile rod speedometer is arranged at the muzzle of the gun barrel of the launching device, and the speedometer is fixedly connected to the guide rail workbench surface.

[0024] The launching device is also fixed on the guide rail workbench surface. The launching port of the pull rod launching device is sequentially connected to the air inlet of the tension cylinder through a high-pressure air pipe, a ventilation hose, a manual valve for exhausting the tension cylinder, and a solenoid valve for releasing the tension cylinder. The air inlet of the tension cylinder is provided with a solenoid valve for the air inlet of the tensile experiment and a pressure gauge. The tensile end experimental rod respectively passes through the projectile rod speedometer, the pull rod launching device, and the support frame of the tension cylinder, and is supported by a rod support device. One end of the tensile experimental rod close to the absorption rod is a flange end, and the other end of the tensile experimental rod is provided with a compressive experimental rod. Experimental adapters are respectively arranged at the ends of the tensile experimental rod and the compressive experimental rod close to each other. The compressive experimental rod is supported by a rod support device, and a projectile rod speedometer and a compressive gun barrel fixed on the horizontal platform are arranged at the other end. The compressive gun barrel is supported by a gun barrel support frame and fixed on the horizontal workbench. The experimental bullet is arranged in the compressive gun barrel. The other end of the compressive launching device is provided with a compressive cylinder integrally fixed on the horizontal platform. The launching end of the compressive cylinder is sequentially connected to the compressive gun barrel through a solenoid valve for exhausting the compressive cylinder and a manual valve for releasing the compressive cylinder. The compressive cylinder control valve group is provided with a solenoid valve for the air inlet and a pressure gauge, etc. The formed assembly combination provides an effective solution for the application test of the dynamic loading device of the tension-compression integrated multifunctional Hopkinson device in the same environmental state.

[0025] The working principle of the utility model is as follows: By utilizing the characteristics of the closed new tension cylinder and the medium gas, and cooperating with the adjustment of the inner sleeve air flow path of the launching device, an obvious instantaneous pressure difference can be formed to push the movement of the closed piston in the device, instantaneously impact and push the impact rod to impact and load the incident rod, convert the axial movement of the loading rod into radial movement, so as to apply a certain radial expansion speed to the rod to realize the impact loading of the rod, and use the launching system of the same device to convert the corresponding rod system for tensile and compressive test applications.

[0026] The implementation operations are as follows: A newly improved tensile cylinder and compression launch control device are installed on the existing Hopkinson bar equipment. The device and the gun barrel are fixed stably on the guide rail workbench through the working plane on the guide rail, and the gun barrel bracket is connected. A projectile rod velocimeter is installed near the pipe orifice. The central brackets are installed in groups, and a sliding sleeve matching the rod diameter is horizontally fixed in the inclined groove of the central bracket. The assembly combination bodies such as the incident bar, the transmitted bar, and the buffer device at the tail are adjusted and tested. After the system is assembled, the loading test application of the Hopkinson equipment with integrated tension and compression of the rod system is realized.

Claims

1. A multifunctional tensile and compressive Hopkinson device, characterized in that: Including: main bench (1), device extension bench (10), pull rod launching device (12), buffer device (9), incident rod (5), projection rod (7) and absorption rod (8). A guide rail base (11) is arranged on the main bench (1) and the device extension bench (10). A guide rail is arranged on the guide rail base (11). One end of the guide rail is provided with a pull rod launching device (12), and the other end of the guide rail is provided with a buffer device (9). An incident rod (5), a projection rod (7) and an absorption rod (8) are sequentially arranged between the pull rod launching device (12) and the buffer device (9) on the guide rail. A bullet rod speedometer (3) is arranged at the muzzle of the gun barrel of the pull rod launching device (12), and the bullet rod speedometer (3) is fixedly connected to the guide rail workbench surface (12.5). The incident rod (5), the projection rod (7) and the absorption rod (8) are respectively located in the sliding sleeves of the sliding sleeve rod central support frame (4), and each sliding sleeve rod central support frame (4) is fixedly connected to the guide rail workbench surface (12.5). A specimen conversion device (6) is arranged between the incident rod (5) and the projection rod (7), and the specimen conversion device (6) is fixedly connected to the guide rail workbench surface (12.5). A multi-functional operation control display console (2) is arranged on the main bench (1), and the horizontal plane at the top of the main bench (1) is at the same height as that of the device extension bench (10).

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