A Hopkinson-based adjustment mechanism and adjustment method

Abstract

The present invention relates to the technical field of material mechanics testing, and discloses an adjustment mechanism and an adjustment method based on Hopkinson. The Hopkinson adjustment mechanism adopted in the method comprises an adjustment rail, a fixed adjustment component and a central guide sleeve. The bottom of the fixed adjustment component is provided with a movable matching connection slider for axial adjustment with the adjustment rail, the top of the fixed adjustment component is provided with a fixed sleeve and an adjustment sleeve for movable matching connection with the central guide sleeve for vertical adjustment, and both sides of the fixed adjustment component are provided with movable matching connection bolts for horizontal adjustment. The present invention can perform all-round precision adjustment, has wide applicability, and each series of rods can be seamlessly connected and used, is easy to install and debug, and has high precision.

Description

Technical Field

[0001] The invention relates to the technical field of material mechanics testing, and in particular to an adjustment mechanism and an adjustment method based on Hopkinson. Background Art The Hopkinson device is used to study the dynamic mechanical properties of materials under high strain rate loading. It is mainly used to analyze the mechanical properties of materials under high strain rate conditions and is widely used in material mechanical analysis in major scientific research institutions and academic institutions. When installing the equipment, it is necessary to fine-tune the 3-6mm slender rod. The equipment error is within the range of 0~0.05mm to make the experimental results accurate and obtain accurate dynamic mechanical properties of the material. During the adjustment process, it was found that the adjustment was difficult and required a lot of installation and debugging experience.

[0002] The current adjustment mechanism mainly relies on multiple screws for adjustment and calibration, which has a great impact on the adjustment techniques, experience and precision of the installer. In some cases, due to lack of experience or time constraints, adjustment is difficult, and it takes a lot of time to install, adjust, calibrate, and fix in the required precise position. It usually takes 2 to 5 days to debug. As a result, a lot of manpower and time are wasted on the installation of the entire Hopkinson equipment. The accuracy of the installation directly leads to the accuracy of the experimental results. If the position of the adjustment mechanism has too much deviation, such as the horizontality is greater than 0.1mm, it will cause unpredictable deviations to the experimental results. In extreme cases, it may cause friction and damage to the rod system, affecting the accuracy of the test data obtained and reducing the service life of the equipment. Summary of the invention

[0003] In order to overcome the deficiencies of the prior art, the present invention provides an adjustment mechanism and an adjustment method based on Hopkinson.

[0004] In order to solve the above technical problems, a technical solution adopted by the present invention is:

[0005] An adjustment mechanism based on Hopkinson, comprising three parts: an adjustment rail, a fixed adjustment assembly, and a center guide sleeve, wherein a sliding block for axial adjustment with the adjustment rail is provided at the bottom of the fixed adjustment assembly, a fixed sleeve and an adjustment sleeve for axial adjustment with the center guide sleeve are provided at the top of the fixed adjustment assembly, and movable matching connection bolts for horizontal adjustment are provided on both sides of the fixed adjustment assembly;

[0006] The upper part of the central guide sleeve is provided with a shaft sleeve of a slender rod, the lower part of the central guide sleeve is provided with a screw rod passing through a fixing sleeve and an adjusting sleeve of a fixing adjustment component, and the end of the screw rod is provided with a washer and a screw.

[0007] A Hopkinson-based adjustment mechanism, wherein the adjustment guide rail can fix the adjustment component at various use positions of the Hopkinson device.

[0008] An adjustment method based on the Hopkinson adjustment mechanism is used to quickly adjust the coaxiality and horizontality of the rod system of the Hopkinson experimental equipment, and to provide precise guidance and self-adjustment for the high-speed moving rod system during the experiment. That is, the horizontality of the rod system should always be kept within 0.05mm during the actual movement process, so that the experimental data is more accurate. The steps are as follows:

[0009] 1) Fix the adjustment assembly at each use position of the Hopkinson equipment through the adjustment rail; that is, fix the adjustment assembly on the adjustment rail by fixing the bottom of the adjustment assembly and the movable matching connecting slide block for axial adjustment of the adjustment rail;

[0010] 2) Align the slender rod of the sleeve on the center guide sleeve at the top of the adjustment assembly with the impact hole of the Hopkinson device;

[0011] 3) Adjust the coaxiality and horizontality of the slender rod corresponding to the impact hole of the Hopkinson experimental equipment;

[0012] Adjust the coaxiality and horizontality by adjusting the fixed sleeve and the adjustment sleeve that move together with the screw rod of the top of the fixed adjustment component and the center guide sleeve for up and down adjustment, and adjusting the bolts that move together with the horizontal adjustment on both sides of the fixed adjustment component;

[0013] By adjusting the components, multi-dimensional axis precision adjustment in space can be achieved, reducing the accuracy to below 0.05mm; even during high-speed movement, the horizontality and concentricity can be guaranteed to be within 0.01mm, thus ensuring the accuracy of the experimental results.

[0014] Due to the adoption of the above technical solution, the advantages of the present invention are:

[0015] The main purpose of the present invention is to quickly adjust the coaxiality and horizontality of the rod system of the Hopkinson experimental equipment, and to provide precise guidance and self-alignment for the high-speed moving rod system during the experiment, that is, the horizontality of the rod system should always be kept within 0.05mm during the actual movement process, so that the experimental data is more accurate.

[0016] The adjustment assembly of the present invention can realize multi-dimensional axis precision adjustment in space, and reduce the accuracy to below 0.05mm. It is convenient and fast to adjust, that is, the time of installation and debugging can be shortened by more than 50%, and the structure is simple and does not require special maintenance in the later stage. The adjustment assembly has a locking function to prevent the high-speed movement of the rod system and the slight movement of the adjustment mechanism caused by the impact. Even in the process of high-speed movement, the horizontality and concentricity can be guaranteed to be within 0.01mm, thereby ensuring the accuracy of the experimental results. The guide sleeve can adaptively adjust the position under the action of the rod system, provide precise and stable guiding effect for the high-speed movement of the rod system, and can eliminate the processing problems of small non-concentricity and non-levelness of the rod system.

[0017] The specific advantages are as follows:

[0018] 1. It can carry out all-round precision adjustment and realize rapid adjustment, which is twice as efficient as the previous adjustment mechanism.

[0019] 2. Wide applicability, especially for the adjustment of thin and long rods. Rods of various specifications ranging from Φ1 to 30 mm can be seamlessly connected and used;

[0020] 3. Modular design makes installation and debugging easy and precise, which greatly reduces the reliance on experience. Ordinary personnel can also debug accurately and the system has high stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Schematic diagram of the Hopkinson adjustment mechanism.

[0022] Figure 2 Cross-section of the Hopkinson adjustment mechanism.

[0023] Figure 3 Application diagram of the Hopkinson adjustment mechanism. DETAILED DESCRIPTION

[0024] The technology of the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0025] like Figure 1 , 2 As shown in FIG. 3 , an adjustment mechanism based on Hopkinson comprises three parts: an adjustment guide rail 3, a fixed adjustment component 2 and a center guide sleeve 1. The bottom of the fixed adjustment component 2 is provided with a movable matching connection slider 2.4 for axial adjustment with the adjustment guide rail 3. The top of the fixed adjustment component 2 is provided with a fixed sleeve 2.2 and an adjustment sleeve 2.1 for vertical adjustment with the center guide sleeve 1. Both sides of the fixed adjustment component 2 are provided with movable matching connection bolts 2.3 for horizontal adjustment.

[0026] The upper part of the center guide sleeve 1 is provided with a shaft sleeve 1.1 of a slender rod 4, and the lower part of the center guide sleeve 1 is provided with a screw rod 1.2 passing through a fixed sleeve 2.2 and an adjusting sleeve 2.1 of the fixed adjustment component 2, and the end of the screw rod 1.2 is provided with a washer 1.4 and a screw 1.3.

[0027] The adjustment rail 3 can fix the adjustment assembly 2 at various used positions of the Hopkinson device.

[0028] An adjustment method based on the Hopkinson adjustment mechanism is used to quickly adjust the coaxiality and horizontality of the rod system of the Hopkinson experimental equipment, and to provide precise guidance and self-adjustment for the high-speed moving rod system during the experiment. That is, the horizontality of the rod system should always be kept within 0.05mm during the actual movement process, so that the experimental data is more accurate. The steps are as follows:

[0029] 1) The adjustment assembly 2 is fixed at each use position of the Hopkinson device by means of the adjustment guide rail 3; that is, the adjustment assembly 2 is fixed on the adjustment guide rail 3 by means of a movable matching connecting slider 2.4 for axial adjustment of the bottom of the adjustment assembly 2 and the adjustment guide rail 3.

[0030] 2) Install the elongated rod 4 on the sleeve 1.1 on the center guide sleeve 1 at the top of the adjustment component 2 so that it corresponds to the impact hole of the Hopkinson device.

[0031] 3) Adjust the coaxiality and horizontality of the slender rod 4 corresponding to the impact hole of the Hopkinson experimental equipment.

[0032] The coaxiality and horizontality are adjusted by adjusting the fixed sleeve 2.2 and the adjusting sleeve 2.1 for the upward and downward adjustment of the screw rod 1.2 of the center guide sleeve at the top of the fixed adjustment component 2, and adjusting the bolts 2.3 for the horizontal adjustment of the two sides of the fixed adjustment component 2 for the upward and downward adjustment.

[0033] By adjusting the component 2, the multi-dimensional axis 3.5 in space can be precisely adjusted to reduce the accuracy to below 0.05mm; even during high-speed movement, the horizontality and concentricity can be guaranteed to be within 0.01mm, thereby ensuring the accuracy of the experimental results.

Claims

1. An adjustment method based on a Hopkinson adjustment mechanism, comprising an adjustment mechanism based on a Hopkinson adjustment mechanism, comprising three parts: an adjustment guide rail (3), a fixed adjustment component (2) and a center guide sleeve (1); the bottom of the fixed adjustment component (2) is provided with a sliding block (2.4) for axial adjustment with the adjustment guide rail (3); the top of the fixed adjustment component (2) is provided with a fixed sleeve (2.2) and an adjustment sleeve (2.1) for axial adjustment with the center guide sleeve (1); both sides of the fixed adjustment component (2) are provided with movable connection bolts (2.3) for horizontal adjustment; the upper part of the center guide sleeve (1) is provided with a shaft sleeve (1.1) of a slender rod (4); the lower part of the center guide sleeve (1) is provided with a screw (1.2) that passes through the fixed sleeve (2.2) and the adjustment sleeve (2.1) of the fixed adjustment component (2); the ends of the screw (1.2) are provided with washers (1.4) and screws (1.3); the characteristics are as follows: The adjustment method based on the Hopkinson adjustment mechanism is used to quickly adjust the coaxiality and horizontality of the rod system of the Hopkinson experimental equipment, and to provide precise guidance and self-adjustment for the high-speed moving rod system during the experiment. That is, the horizontality of the rod system should always be kept within 0.05mm during the actual movement process, so that the experimental data is more accurate. The steps are as follows: 1) The adjustment component (2) is fixed at each use position of the Hopkinson device by means of the adjustment guide rail (3); that is, the adjustment component (2) is fixed on the adjustment guide rail (3) by means of a movable matching connecting slider (2.4) for axial adjustment of the bottom of the adjustment component (2) and the adjustment guide rail (3); 2) Install the shaft sleeve (1.1) on the center guide sleeve (1) at the top of the adjustment component (2) to the slender rod (4) so ​​that it corresponds to the impact hole of the Hopkinson device; 3) adjusting the coaxiality and horizontality of the slender rod (4) corresponding to the impact hole of the Hopkinson experimental equipment; The coaxiality and horizontality are adjusted by adjusting the fixed sleeve (2.2) and the adjusting sleeve (2.1) that move together with the screw rod (1.2) of the top of the fixed adjustment component (2) and the center guide sleeve for vertical adjustment, and adjusting the bolts (2.3) that move together with the horizontal adjustment on both sides of the fixed adjustment component (2); By adjusting the components (2), the multi-dimensional axis (3.5) in space can be precisely adjusted to reduce the accuracy to below 0.05 mm; even during high-speed movement, the horizontality and concentricity can be guaranteed to be within 0.01 mm, thereby ensuring the accuracy of the experimental results.

2. The adjustment method based on the Hopkinson adjustment mechanism according to claim 1, characterized in that: The adjustment guide rail (3) is capable of fixing the adjustment assembly (2) at various use positions of the Hopkinson device.

Images