CN107024382B - Auxiliary device for Hopkinson pressure rod device - Google Patents

Abstract

The invention discloses an auxiliary device for a Hopkinson pressure rod device, which includes: a support plate; an adjustment bolt threadedly connected to the support plate; a support rod located above the support plate and sleeved on the adjustment bolt. The support rod can be positioned relative to the support plate. The adjusting bolt rotates; a tray is set on the top of the support rod, and the tray is used to support the specimen. When conducting the test, first place the test piece between the incident rod and the transmission rod, then screw the adjusting bolt and adjust the position of the support rod so that the tray on the support rod is located at the bottom of the test piece to support the test piece. Rotate the support rod to align the tray with the specimen, and finally push the incident rod and transmission rod to clamp the specimen. Since the specimen is supported by the pallet, it will not slip or fall off. In addition, the present invention also adds a protective box to limit the test space to the protective box, thus preventing flying debris from injuring the operator.

Description

Auxiliary device for Hopkinson pressure rod device

Technical field

The present invention relates to the field of experimental devices for testing material dynamic properties under high strain rates, and more specifically, to an auxiliary device for a Hopkinson pressure bar device.

Background technique

The Hopkinson compression bar device is a basic test device for testing the dynamic properties of materials under high strain rates. Due to its simple structure, easy operation, and easy control of the loading waveform, the test device is widely used to test materials under high strains. In the test of dynamic characteristics within the rate range. During the test, the incident rod and the transmission rod clamp the test piece, and then impact the incident rod, causing the test piece to be impacted at high speed. The operator records the entire process of the test piece being destroyed. The specimen is clamped between the incident rod and the transmission rod. In order to reduce the friction between the specimen and the incident rod and transmission rod, lubricant is usually applied to the end of the specimen before the test. However, due to the reduced friction between the test piece and the incident rod and transmission rod, the test piece is easy to move or fall off under the action of its own gravity, resulting in the failure of the test piece to be coaxial with the incident rod and transmission rod, thus causing the test Errors or even mistakes may occur.

Therefore, during the Hopkinson pressure bar test, how to ensure that the specimen is coaxial with the incident rod and transmission rod, thereby improving the accuracy of the test, is a key issue that those skilled in the art need to solve urgently.

Contents of the invention

The object of the present invention is to provide an auxiliary device for the Hopkinson pressure rod test, which can ensure that the test piece is coaxial with the incident rod and the transmission rod, thereby improving the accuracy of the test.

In order to achieve the above objects, the present invention provides the following technical solutions:

An auxiliary device for a Hopkinson pressure rod device, including:

support plate;

Adjustment bolts threadedly connected to the support plate;

A support rod located above the support plate and sleeved on the adjustment bolt, and the support rod can rotate relative to the adjustment bolt;

A tray is provided at the top of the support rod, and the tray is used to support the test piece.

Preferably, it also includes a suspension rod, the support plate is connected to the suspension rod, and the suspension rod can drive the support plate to move up and down.

Preferably, the bottom of the suspension rod is provided with a section of installation thread, and the installation thread is passed through the support plate; it also includes an upper nut and a lower nut that cooperate with the installation thread, and the upper nut and the The lower nut locks the support plate on the suspension rod.

Preferably, it also includes a protective box, and the support plate, the adjusting bolt, the support rod, and the tray are all located in the protective box;

The incident rod and the transmission rod are respectively inserted into the first side plate and the second side plate of the protective box;

Among the third side panel and the fourth side panel of the protective box, at least one is made of transparent material, and at least one is openable.

Preferably, the suspension rod is inserted into the top cover of the protective box, the suspension rod is provided with an adjustment thread, and an adjustment nut that cooperates with the adjustment thread locks the suspension rod on the top cover. .

Preferably, there are two hanging rods, which are distributed on both sides of the support plate, and the top ends of the two hanging rods are connected by a cross bar.

Preferably, it also includes a collection box arranged at the bottom of the protective box.

Preferably, the third side panel and the fourth side panel of the protective box are both transparent organic glass plates;

The protective box also has a first slot and a second slot that cooperate with the third side plate and the fourth side plate respectively, and the third side plate and the fourth side plate can be inserted into each other respectively. into the first card slot and the second card slot, and can be extracted from the first card slot and the second card slot respectively.

Preferably, the bottom plate of the protective box has a first fixing plate and a second fixing plate extending out of the first side plate and the second side plate respectively. The first fixing plate and the second fixing plate Bolt holes for fixing the protective box to the cross beam are provided on both sides.

Preferably, the inner wall of the protective box is provided with foam sound-absorbing material.

Preferably, a top cover handle is provided on the top cover of the protective box.

It can be seen from the above technical solution that when conducting the test, first place the test piece between the incident rod and the transmission rod, then screw the adjusting bolt and adjust the position of the support rod so that the tray on the support rod is located at the bottom of the test piece , used to support the specimen, then rotate the support rod to align the tray with the specimen, and finally push the incident rod and transmission rod to clamp the specimen. Since the specimen is supported by the pallet, the specimen will not slide down or fall off, thereby ensuring that the specimen is coaxial with the incident rod and transmission rod, thus improving the accuracy of the Hopkinson compression bar test.

Description of the drawings

In order to more clearly illustrate the solutions in the embodiments of the present invention, a brief introduction will be given below to the drawings needed to describe the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without exerting creative efforts.

Figure 1 is a schematic diagram of the overall structure of the auxiliary device of the Hopkinson pressure rod device provided by a specific embodiment of the present invention;

Figure 2 is a front sectional view of Figure 1;

FIG. 3 is a side cross-sectional view of FIG. 1 .

Among them, 1 is the incident rod, 2 is the transmission rod, 3 is the adjusting nut, 4 is the adjusting bolt, 5 is the tray, 6 is the support rod, 7 is the first slot, 8 is the collection box, 9 is the second slot, 10 is the fixing bolt, 11 is the test piece, 12 is the top cover handle, 13 is the suspension rod, 14 is the support plate, 15 is the top cover, 16 is the first fixed plate, 17 is the second fixed plate, 18 is the first side 19 is the second side plate, 20 is the third side plate, and 21 is the fourth side plate.

Detailed ways

The invention provides an auxiliary device for the Hopkinson pressure rod test. The auxiliary device can ensure that the test piece is coaxial with the incident rod and the transmission rod, thereby improving the accuracy of the test.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without any creative work fall within the scope of protection of the present invention.

Please refer to Figure 1-Figure 3. In a specific embodiment of the present invention, the auxiliary device of the Hopkinson compression bar test includes a support plate 14, an adjustment bolt 4, a support rod 6 and a tray 5.

The support plate 14 is used to support the pallet 5 . The adjusting bolt 4 is threadedly connected to the support plate 14. The support rod 6 is located above the support plate 14 and has a hollow structure. The support rod 6 is sleeved on the adjusting bolt 4 and can rotate relative to the adjusting bolt 4 . The tray 5 is arranged on the top of the support rod 6 . The tray 5 can be welded to the support rod 6 by welding. When the support rod 6 rotates, it can drive the tray 5 to rotate together, thereby achieving the centering of the tray 5 and the specimen 11. When the adjusting bolt 4 is screwed, the support rod 6 can move up and down, thereby enabling the tray 5 to be adjusted up and down.

When performing the test, first place the specimen 11 between the incident rod 1 and the transmission rod 2, then screw the adjusting bolt 4 and adjust the position of the support rod 6 so that the tray 5 on the support rod 6 is located at the bottom of the specimen 11 , used to support the specimen 11, then rotate the support rod 6 to align the tray 5 with the specimen 11, and finally push the incident rod 1 and the transmission rod 2 to clamp the specimen 11. Since the specimen 11 is supported by the tray 5, the specimen 11 will not slide down or fall off, thereby ensuring that the specimen 11 is coaxial with the incident rod 1 and the transmission rod 2, thus improving the accuracy of the Hopkinson compression bar test.

In a specific embodiment of the present invention, a suspension rod 13 connected to the support plate 14 is added. The suspension rod 13 can move up and down, so the suspension rod 13 can drive the support plate 14, the support rod 6 and the tray 5 to move up and down, thereby Realize rough adjustment of the vertical displacement of the pallet 5. Then the adjusting bolt 4 realizes fine adjustment of the vertical position of the pallet 5 . In this way, the position of the tray 5 can be easily adjusted. The up and down movement of the suspension rod 13 can be realized in various ways, such as cylinders, screws, etc.

In a specific embodiment of the present invention, a section of mounting thread is provided at the bottom of the suspension rod 13 , and the section of mounting thread passes through the support plate 14 . This embodiment also includes an upper nut and a lower nut. The upper nut is located above the support plate 14 and the lower nut is located below the support plate 14. Tighten the upper nut and the lower nut to lock the support plate 14 on the suspension rod 13. In this embodiment, within the length range of the installation thread, the support plate 14 can be moved up and down to achieve further rough adjustment of the support plate 14. When the support plate 14 moves to a suitable position, tighten the upper and lower nuts. In addition, the support plate 14 and the suspension rod 13 in this embodiment are detachably connected. When the support plate 14 is damaged, the support plate 14 can be easily replaced.

In a specific embodiment of the present invention, a protective box is also included. The support plate 14, the support rod 6, the tray 5 and the adjusting bolt 4 are all arranged in the protective box. The protective box has four side panels. The incident rod 1 and the transmission rod 2 are respectively inserted into the first side plate 18 and the second side plate 19 . At least one of the third side plate 20 and the fourth side plate 21 is made of transparent material, so that the operator can conveniently observe the test process in the protective box. In addition, at least one of the third side panel 20 and the fourth side panel 21 is openable, which facilitates debugging of the position of the tray 5 and can be closed after debugging is completed. The openable type can be a pull-out type or a flip-up type. In this embodiment, the test space is limited to the protective box, which prevents flying debris from hurting the operator and effectively improves the safety performance of the test.

In a specific embodiment of the present invention, the above-mentioned suspension rod 13 is inserted into the top cover 15 of the protective box, or in other words, the suspension rod 13 extends out of the top cover 15 . The suspension rod 13 is provided with an adjustment thread, and the adjustment nut 3 that cooperates with the adjustment thread can lock the suspension rod 13 on the top cover 15 . Those skilled in the art can understand that the axial length of the adjustment thread is the range in which the suspension rod 13 moves up and down. The axial length of the adjustment thread can be set according to actual needs.

Furthermore, in order to ensure the stability of the suspension rod 13, two suspension rods 13 may be provided. Two suspension rods 13 are distributed on both sides of the support plate 14 . The tops of the two suspension rods 13 are connected as one body through cross bars.

Debris will be generated during the test. In order to facilitate the collection of debris, a collection box 8 can also be set at the bottom of the protective box. In this way, the splashed fragments finally fall into the collection box 8 . Then open the third side panel 20 or the fourth side panel 21 to take out the collection box 8 . In addition, a handle can also be provided on the collection box 8 to facilitate the operator to take out the collection box 8 .

In a specific embodiment of the present invention, it is specified that the third side panel 20 and the fourth side panel 21 of the protective box are both transparent organic glass plates, which is more convenient for the operator's observation. In addition, in this embodiment, the third side plate 20 and the fourth side plate 21 are both detachable. The specific detachable structure is as follows: the protective box is provided with a first slot 7 that matches the third side plate 20 and a second slot 9 that matches the fourth side plate 21 . The third side panel 20 can be inserted into the first slot 7 to install the third side panel 20 , and the third side panel 20 can also be pulled out of the first slot 7 to open the third side panel 20 . The fourth side plate 21 can be inserted into the second card slot 9 and can also be extracted from the second card slot 9 . The first latching slot 7 and the second latching slot 9 may be vertical or horizontal, respectively corresponding to the up and down and left and right pulling of the third side plate 20 and the fourth side plate 21 .

In a specific embodiment of the present invention, the bottom plate of the protective box has a first fixing plate 16 and a second fixing plate 17 extending out of the first side plate 18 and the second side plate 19 respectively. It can also be understood that the first fixed plate 16 and the second fixed plate 17 are extensions of the bottom plate in the direction of the incident rod 1 or the transmission rod 2 . The first fixing plate 16 and the second fixing plate 17 are both provided with bolt holes for fixing the protective box to the cross beam, thus ensuring the stability of the protective box. The beam is a beam in the Hopkinson pressure rod device.

In order to reduce test noise and optimize the test environment, in a specific embodiment of the present invention, foam sound-absorbing material 9 is provided on the inner wall of the protective box.

In order to facilitate opening the top cover 15, a top cover handle 12 can also be provided on the top cover 15.

To sum up, when conducting the test, first pull out the third side plate 20 and the fourth side plate 21, and adjust the incident rod 1 and the transmission rod 2 to the appropriate position to leave an installation distance between them. Then move the suspension rod 13 so that the tray 5 is close to the incident rod 1 and transmission rod 2. This is a rough adjustment. After the rough adjustment is in place, tighten the adjusting nut 3 to lock the suspension rod 13 on the top cover 15. Then place the specimen 11 coated with lubricant between the incident rod 1 and the transmission rod 2, and then screw the adjusting bolt 4 so that the tray 5 supports the specimen 11 and is centered with the specimen 11. This is fine adjustment. Then move the incident rod 1 and the transmission rod 2, clamp the specimen 11, and finally insert the third side plate 20 and the fourth side plate 21 into the first slot 7 and the second slot 9 respectively, so that the protective box is closed state. After the test, pull out the third side plate 20 and the fourth side plate 21, move the incident rod 1 and the transmission rod 2 to the appropriate position, leaving an appropriate distance in between to prevent subsequent upward movement of the support rod 6 and the Tray 5 causes interference. Unscrew the adjusting nut 3 and move the suspension rod 13 upward to leave enough space under the support plate 14 for the collection box 8 to be taken out. After moving into place, lock the adjusting nut 3. Finally, pull out the collection box 8 and pour the collected fragments into the test bag.

The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be practiced in other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (6)

1. An auxiliary device for a hopkinson pressure bar device, comprising:

a support plate (14);

an adjusting bolt (4) in threaded connection with the support plate (14);

the support rod (6) is arranged above the support plate (14) and sleeved on the adjusting bolt (4), and the support rod (6) can rotate relative to the adjusting bolt (4);

the tray (5) is arranged at the top end of the supporting rod (6), and the tray (5) is used for supporting a test piece (11);

the device also comprises a suspension rod (13), wherein the supporting plate (14) is connected to the suspension rod (13), and the suspension rod (13) can drive the supporting plate (14) to move up and down;

the bottom of the suspension rod (13) is provided with a section of mounting thread, and the mounting thread penetrates through the supporting plate (14); the device further comprises an upper nut and a lower nut which are matched with the mounting threads, and the upper nut and the lower nut lock the supporting plate (14) on the suspension rod (13);

the device also comprises a protective box, wherein the supporting plate (14), the adjusting bolt (4), the supporting rod (6) and the tray (5) are all positioned in the protective box;

the incidence rod (1) and the transmission rod (2) are respectively arranged in a first side plate (18) and a second side plate (19) of the protective box in a penetrating way;

at least one of the third side plate (20) and the fourth side plate (21) of the protective box is made of transparent material, and at least one of the third side plate and the fourth side plate is openable;

the cantilever (13) is provided with a section of adjusting screw thread, the adjusting screw thread penetrates through the top cover (15) of the protective box, and the adjusting nut (3) matched with the adjusting screw thread locks the cantilever (13) on the top cover (15).

2. The auxiliary device of the hopkinson pressure bar device according to claim 1, wherein two suspension rods (13) are distributed on two sides of the supporting plate (14), and the top ends of the two suspension rods (13) are connected through a cross rod.

3. The auxiliary device of a hopkinson pressure bar arrangement according to claim 1, further comprising a collecting box (8) arranged at the bottom of the protective box.

4. Auxiliary device of hopkinson pressure bar arrangement according to claim 1, characterized in that the third side plate (20) and the fourth side plate (21) of the protective box are transparent plexiglass plates;

the protection box is further provided with a first clamping groove (7) and a second clamping groove (9) which are matched with the third side plate (20) and the fourth side plate (21) respectively, and the third side plate (20) and the fourth side plate (21) can be inserted into the first clamping groove (7) and the second clamping groove (9) respectively and can be pulled out from the first clamping groove (7) and the second clamping groove (9) respectively.

5. The auxiliary device of a hopkinson pressure bar device according to claim 1, characterized in that the bottom plate of the protective box is provided with a first fixing plate (16) and a second fixing plate (17) which respectively extend out of the first side plate (18) and the second side plate (19), and bolt holes for fixing the protective box on a cross beam are arranged on the first fixing plate (16) and the second fixing plate (17).

6. The auxiliary device for a hopkinson pressure bar apparatus as claimed in claim 1, wherein a foam sound absorbing material is provided on an inner wall of the protective case.