A centering and clamping device for the connecting rod of a split Hopkinson device and its usage method

Abstract

The present invention belongs to the technical field of Hopkinson bar experimental technology and application technology. In order to solve the problem that the existing device cannot be applied to any rod diameter and has large friction, a centering and clamping device for the connecting rod of a split Hopkinson device and a using method are provided. This device includes a base, a positioning chuck assembly, a track mechanism, a connecting rod mechanism, a locking mechanism and an induction control mechanism. The positioning chuck assembly includes two first guiding and positioning chucks, and second guiding and positioning chucks are arranged inside each of them. The connecting rod mechanism drives the two first guiding and positioning chucks to move towards or away from each other along the extension direction of the track mechanism to clamp or release the rod, and the second guiding and positioning chucks are driven separately to clamp the impact piece. The locking mechanism clamps or releases the connecting rod mechanism, and the induction control mechanism receives signals to control the horizontal position of the base and the centering of the rod. This device is applicable to various rod diameters, has universality, and reduces the friction between the first guiding and positioning chuck and the rod and between the second guiding and positioning chuck and the impact piece.

Description

Technical Field

[0001] The present invention belongs to the technical field of Hopkinson bar experiment technology and application technology, and particularly relates to an alignment and clamping device for connecting rods of a split Hopkinson device and a using method thereof. Background Art

[0002] In fields such as aviation, aerospace, automobiles, transportation, and packaging, engineering materials will encounter impact loading situations such as high-speed collisions and explosions, and the mechanical properties of each material under dynamic loading are different from those under static loading. The Hopkinson bar is a physical property testing instrument used in the basic disciplines of mechanics, engineering, and technical sciences, materials science, and mechanical engineering. Conducting Hopkinson tensile experiments can accurately obtain the stress-strain curve of materials, which is a commonly used dynamic test method.

[0003] In the existing split Hopkinson bar device system structure, to meet the requirements of high loading rate and high strain rate, the incident bar and the transmission bar are several meters long in the test. However, the driving bar, the incident bar, and the transmission bar are prone to bending under the action of impact loads, resulting in the non-alignment of each bar on the same axis. Therefore, an impact piece is provided at the end where the transmission bar contacts the incident bar, but it is difficult to align the impact piece with the transmission bar, and the resulting systematic error has a great impact on the reliability and accuracy of the test results. To ensure the horizontal alignment between the driving bar and the incident bar, and between the incident bar and the transmission bar, the existing alignment devices include nylon sleeves, linear bearings, and bearing cages, etc. Although these alignment devices are widely used, there are the following problems: nylon sleeves, linear bearings, and bearing cages cannot be interchanged under different rod diameters, and the applicability is low; moreover, during the test process, nylon sleeves and bearing cages generate friction with each bar, resulting in an increase in axial sliding resistance and causing systematic errors; in a high loading rate and high strain rate test environment, using linear bearings will generate vibration and noise, and measures need to be taken to reduce the impact of vibration and noise on the test results, and more frequent maintenance is required. Summary of the Invention

[0004] To solve the above technical problems, the present invention provides an alignment and clamping device for connecting rods of a split Hopkinson device that is applicable to any rod diameter and reduces friction, as well as a using method thereof.

[0005] The first aspect of the present invention provides an alignment and clamping device for connecting rods of a split Hopkinson device, including:

[0006] A base;

[0007] Positioning chuck assembly, the positioning chuck assembly includes two first guiding and positioning chucks for clamping the rods of the split Hopkinson device. First anti-friction mechanisms are provided at the clamping ends of the two first guiding and positioning chucks. Driving members and second guiding and positioning chucks for clamping the impact members of the split Hopkinson device are provided inside the two first guiding and positioning chucks. The second guiding and positioning chuck includes a connecting rod and a second chuck head. A second anti-friction mechanism is provided at the clamping end of the second chuck head. One end of the connecting rod away from the second chuck head is connected to the driving member, and the driving member drives the second guiding and positioning chuck to move reciprocally;

[0008] Track mechanism, the track mechanism is arranged on the base;

[0009] Linkage mechanism, the linkage mechanism is arranged inside the track mechanism and is used to connect the two first guiding and positioning chucks. Driving the linkage mechanism drives the two first guiding and positioning chucks to move towards or away from each other along the extending direction of the track mechanism;

[0010] Locking mechanism, the locking mechanism is arranged on the outer surface of the track mechanism. Driving the locking mechanism drives the track mechanism to clamp or release, so as to clamp or release the linkage mechanism;

[0011] Inductive control mechanism, the inductive control mechanism includes a plurality of inclination sensors, a first position sensor, a second position sensor and a control device. The inclination sensors are arranged on the base and are used to transmit the inclination signals of the base. The first position sensor is arranged on the first guiding and positioning chuck and is used to transmit the position signals of the horizontal movement of the first guiding and positioning chuck. The second position sensor is arranged on the second guiding and positioning chuck and is used to transmit the position signals of the horizontal movement of the second guiding and positioning chuck. The control device receives and feeds back the inclination signals and the position signals.

[0012] Optionally, the first guiding and positioning chuck includes a sliding part and a first chuck head. The two ends of the sliding part are respectively connected to the linkage mechanism and the first chuck head. The first anti-friction mechanism and the first position sensor are both arranged at the clamping end of the first chuck head.

[0013] Optionally, an opening suitable for the second guiding and positioning chuck to extend out is provided at the clamping end of the first chuck head;

[0014] The clamping ends of the first chuck head and the second chuck head are both V-shaped.

[0015] Optionally, the rail mechanism includes two first cross rails, two clamping plates, and two second cross rails that are oppositely arranged. The first cross rails are hingedly connected to the clamping plates, and the two second cross rails and the two first cross rails are symmetrically arranged along the longitudinal center line of the base.

[0016] On the inner sides of the two first cross rails, first grooves adapted to the sliding portion are oppositely arranged. On the inner sides of the two second cross rails, second grooves adapted to the sliding portion are oppositely arranged.

[0017] Optionally, the induction control mechanism further includes a first limit sensor and a second limit sensor. The first limit sensor and the second limit sensor respectively arranged on the first cross rail and the second cross rail are both connected to the input end of the control device. The first limit sensor is arranged at the end of the first groove, and the second limit sensor is arranged at the end of the second groove. The first limit sensor and the second limit sensor respectively transmit the displacement signals of the first guiding and positioning chuck connected thereto.

[0018] Optionally, the link mechanism includes a first link, a driving rod, a long link, a forked link, and a second link that are sequentially connected.

[0019] The driving rod is perpendicular to the base and is arranged between the two clamping plates. On one side of the two clamping plates facing the driving rod, first gears are arranged. On both sides of the driving rod facing the two clamping plates, second gears meshing with the first gears are arranged.

[0020] The connecting ends of the two first guiding and positioning chucks are respectively connected to the first link and the second link. The first link is arranged between the two first cross rails, and the second link and the forked link are arranged between the two second cross rails.

[0021] Optionally, the locking mechanism includes a pressing handle, a locking shaft, and a pin shaft. The locking shaft passes through the two clamping plates and the driving rod.

[0022] The pressing handle includes a cam and a rotating handle that are connected. The cam is arranged at one end of the locking shaft through the pin shaft and can rotate along the pin shaft. The pin shaft is arranged offset from the center of the cam to drive the rotating handle and drive the cam to rotate along the pin shaft to drive the two clamping plates to clamp or release.

[0023] Optionally, the base includes a bottom plate and four hoof feet. Openings adapted for the link mechanism to pass through are provided at both ends of the bottom plate.

[0024] The hoof feet include hoof foot seats, threaded rods and shock pads. Threaded holes are formed at the four corners of the bottom plate. The four threaded rods are respectively threadedly connected to the four threaded holes. The hoof foot seats are arranged at the bottoms of the threaded rods, and the shock pads are arranged at the bottoms of the hoof foot seats;

[0025] A third groove is formed at the top of the threaded rod. The number of the inclination sensors is the same as that of the threaded rods. The four inclination sensors are respectively arranged in the four third grooves.

[0026] Optionally, the first anti-friction mechanism includes a first cage and a plurality of first balls. The plurality of first balls are arranged at intervals in the first cage, and the plurality of first balls are in contact with the rod;

[0027] The second anti-friction mechanism includes a second cage and a plurality of second balls. The plurality of second balls are arranged at intervals in the second cage, and the plurality of second balls are in contact with the impact member.

[0028] The second aspect of the present invention provides a method for using a centering and clamping device for a connecting rod of a split Hopkinson device. The method is completed based on any one of the above-mentioned centering and clamping devices for a connecting rod of a split Hopkinson device. The rod of the split Hopkinson device includes a driving rod, an incident rod and a transmission rod which are arranged in sequence and at intervals. The driving rod drives the incident rod to move towards the transmission rod. An impact member is arranged between the incident rod and the transmission rod. The method includes the following steps:

[0029] S1. Respectively arrange two centering and clamping devices for a connecting rod of a split Hopkinson device at the positions between the driving rod and the incident rod and between the incident rod and the transmission rod;

[0030] S2. According to the inclination signal of the base fed back to the control device by the inclination sensor, adjust the base to keep the base horizontal;

[0031] S3. Rotate the connecting rod mechanisms on the two centering and clamping devices for a connecting rod of a split Hopkinson device to drive the two first guiding and positioning chucks on the two centering and clamping devices for a connecting rod of a split Hopkinson device to move towards the driving rod and the incident rod, and the incident rod and the transmission rod respectively. According to the position signals of the horizontal movement of the two first guiding and positioning chucks fed back to the control device by the first position sensors, adjust the connecting rod mechanisms to realize the centering of the driving rod and the incident rod, and the centering of the incident rod and the transmission rod. After centering, drive the locking mechanism to lock the connecting rod mechanisms;

[0032] S4. The control device on the centering and clamping device for the connecting rod of the split Hopkinson device, which is located between the incident rod and the transmission rod, controls the driving member to drive, driving the two second guiding and positioning chucks to move towards the impact member. According to the position signals of the horizontal movement of the two second guiding and positioning chucks fed back by the second position sensor, the control device adjusts the driving member to drive the two second guiding and positioning chucks to move towards the impact member, so that the impact member is centered with the transmission rod. After centering, an external force is applied to the impact member, and the impact member moves towards the transmission rod driven by the second anti-friction mechanism and is fixed to the end of the transmission rod. The control device controls the driving member to retract, driving the two second guiding and positioning chucks to move away from the impact member.

[0033] The technical solution provided by the embodiment of the present invention has the following beneficial effects compared with the prior art:

[0034] A centering and clamping device for the connecting rod of a split Hopkinson device and a using method provided by an embodiment of the present invention. This device is connected to a connecting rod mechanism by setting two first guiding and positioning chucks and is arranged inside a track mechanism. The two first guiding and positioning chucks can move towards each other or away from each other along the extension direction of the track mechanism driven by the connecting rod mechanism. According to the position signals of the horizontal movement of the first guiding and positioning chucks fed back by the first position sensor, the connecting rod mechanism can be further adjusted so that the two first guiding and positioning chucks move to achieve preliminary centering of the two rods. The first anti-friction mechanism contacts the rod, reducing the friction generated between the first guiding and positioning chuck and the rod and improving the accuracy of the experimental results. The driving member can drive the two second guiding and positioning chucks to move towards the impact member. According to the position signals of the horizontal movement of the second guiding and positioning chucks fed back by the second position sensor, the control device controls the driving member so that the two second guiding and positioning chucks move to center the impact member with the rod, realizing the integration of the clamping of the impact member and the centering with the rod. Moreover, by clamping the rod with the two first guiding and positioning chucks moving towards each other and clamping the impact member with the two second guiding and positioning chucks moving towards each other, it is possible to clamp rods and impact members with any rod diameter, improving the applicability of the device. Of course, this device is applicable to both the centering of the incident rod and the transmission rod and the centering of the driving rod and the incident rod, having universality. Description of the Drawings

[0035] The drawings here are incorporated into the specification and form a part of this specification, showing embodiments consistent with the present invention and used together with the specification to explain the principles of the present invention.

[0036] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0037] Figure 1 Structural schematic diagram of the alignment and clamping device for the connecting rod of the split Hopkinson device according to the embodiment of the present invention;

[0038] Figure 2 Structural schematic diagram of the base according to the embodiment of the present invention;

[0039] Figure 3 For Figure 2 Partial enlarged view at position A in

[0040] Figure 4 Structural schematic diagram of the connection between the locking mechanism and the track mechanism according to the embodiment of the present invention;

[0041] Figure 5 Structural schematic diagram of the second cross track according to the embodiment of the present invention;

[0042] Figure 6 Structural schematic diagram of the second guiding and positioning chuck according to the embodiment of the present invention;

[0043] Figure 7 Structural schematic diagram of the connection between the connecting rod mechanism and the first guiding and positioning chuck according to the embodiment of the present invention;

[0044] Figure 8 For Figure 7 Partial enlarged view at position B in

[0045] Among them, 1. Base; 2. Hoof foot; 3. Bottom plate; 4. Threaded rod; 5. Anti-vibration pad; 6. Hoof foot seat; 7. Inclination sensor; 8. First cross rail; 8.1. First groove; 9. Clamping plate; 10. Second cross rail; 10.1. Second groove; 11. Hinge; 12. First limit sensor; 13. Second limit sensor; 14. Press handle; 15. Locking shaft; 16. Pin shaft; 17. First gear; 18. Angle iron; 19. First guiding and positioning chuck; 19.1. Sliding part; 19.2. First column head; 19.3. First anti-friction mechanism; 19.31. First cage; 19.32. First ball; 20. First position sensor; 21. Second position sensor; 22. Second guiding and positioning chuck; 22.1. Connecting rod; 22.2. Second column head; 22.3. Second anti-friction mechanism; 22.31. Second cage; 22.32. Second ball; 23. Driving part; 24. Control device; 25. Active rod; 26. Second gear; 27. First connecting rod; 28. Long connecting rod; 29. Fork-shaped connecting rod; 30. Second connecting rod. Detailed implementation mode

[0046] In order to be able to more clearly understand the above-mentioned objects, features and advantages of the present invention, the solution of the present invention will be further described below. It should be noted that, without conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0047] Many specific details are set forth in the following description in order to fully understand the present invention, but the present invention can also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only part of the embodiments of the present invention, rather than all of the embodiments.

[0048] Refer to Figures 1 to 8 As shown, in the first aspect of this embodiment, a separating Hopkinson equipment connecting rod alignment and clamping device is provided, including a base 1, a positioning chuck assembly, a track mechanism, a connecting rod mechanism, a locking mechanism and an induction control mechanism.

[0049] Among them, the positioning chuck assembly includes two first guiding and positioning chucks 19 for clamping the rods of the split Hopkinson device. First anti-friction mechanisms 19.3 are provided at the clamping ends of the two first guiding and positioning chucks 19. Driving members 23 and second guiding and positioning chucks 22 for clamping the impact members of the split Hopkinson device are provided inside the two first guiding and positioning chucks 19. The second guiding and positioning chuck 22 includes a connecting rod 22.1 and a second chuck head 22.2. A second anti-friction mechanism 22.3 is provided at the clamping end of the second chuck head 22.2. One end of the connecting rod 22.1 away from the second chuck head 22.2 is connected to the driving member 23, and the driving member 23 drives the second guiding and positioning chuck 22 to perform reciprocating motion; the track mechanism is arranged on the base 1; the link mechanism is arranged inside the track mechanism and is used to connect the two first guiding and positioning chucks 19, drive the link mechanism, and drive the two first guiding and positioning chucks 19 to move towards or away from each other along the extension direction of the track mechanism; the locking mechanism is arranged on the outer surface of the track mechanism, drives the locking mechanism, and drives the track mechanism to clamp or release, so as to clamp or release the link mechanism; the induction control mechanism includes an inclination sensor 7, a first position sensor 20, a second position sensor 21 and a control device 24. The inclination sensor 7 is arranged on the base 1 and is used to transmit the inclination signal of the base 1. The first position sensor 20 is arranged on the first guiding and positioning chuck 19 and is used to transmit the position signal of the horizontal movement of the first guiding and positioning chuck 19. The second position sensor 21 is arranged on the second guiding and positioning chuck 22 and is used to transmit the position signal of the horizontal movement of the second guiding and positioning chuck 22. The control device 24 receives and feeds back the inclination signal and the position signal.

[0050] Specifically, two first guiding and positioning chucks 19 are connected to the link mechanism and are arranged inside the track mechanism. Driven by the link mechanism, the two first guiding and positioning chucks 19 can move towards each other or away from each other along the extension direction of the track mechanism. When the two first guiding and positioning chucks 19 move towards each other, according to the position signal of the horizontal movement of the first guiding and positioning chuck 19 fed back by the first position sensor 20 to the control device 24, the link mechanism is further adjusted so that the two first guiding and positioning chucks 19 move to achieve preliminary alignment of the two rods. The first anti-friction mechanism 19.3 contacts the rod, reducing the friction generated between the first guiding and positioning chuck 19 and the rod and improving the accuracy of the experimental results. The driving member 23 is started to drive the two second guiding and positioning chucks 22 to perform reciprocating motion. When the driving member 23 drives the two second guiding and positioning chucks 22 to move towards each other, according to the position signal of the horizontal movement of the second guiding and positioning chuck 22 fed back by the second position sensor 21 to the control device 24, the control device 24 controls the driving member 23 so that the two second guiding and positioning chucks 22 move to align the impact member with the rod. The second anti-friction mechanism 22.3 contacts the impact member, reducing the friction generated between the second guiding and positioning chuck 22 and the impact member, realizing the integration of the clamping of the impact member and the alignment with the rod. Moreover, by clamping the rod with the two first guiding and positioning chucks 19 moving towards each other and clamping the impact member with the two second guiding and positioning chucks 22 moving towards each other, the clamping of rods and impact members with any rod diameter can be realized, improving the applicability of the device. Of course, this device is applicable to both the alignment of the incident rod and the transmission rod and the alignment of the driving rod and the incident rod, having universality.

[0051] Further, referring to Figure 7 and Figure 8 As shown, the first guiding and positioning chuck 19 includes a sliding portion 19.1 and a first head 19.2. The two ends of the sliding portion 19.1 are respectively connected to the link mechanism and the first head 19.2. The first anti-friction mechanism 19.3 and the first position sensor 20 are both arranged at the clamping end of the first head 19.2. Specifically, the first anti-friction mechanism 19.3 includes a first cage 19.31 and a plurality of first balls 19.32. The first cage 19.31 is embedded in the clamping end of the first head 19.2, and the plurality of first balls 19.32 are arranged at intervals in the first cage 19.31 to prevent mutual collision and friction between the plurality of first balls 19.32 during work. When the two first heads 19.2 move towards each other and contact the rod, at this time, the plurality of first balls 19.32 contact the rod, thereby reducing the friction between the first head 19.2 and the rod. At the same time, the setting of the first balls 19.32 facilitates the movement of the rod.

[0052] Referring to Figures 6 to 8As shown, an opening adapted for the second guiding and positioning chuck 22 to extend out is provided on the clamping end of the first chuck head 19.2; the clamping ends of both the first chuck head 19.2 and the second chuck head 22.2 are V-shaped. Specifically, by setting the clamping ends of both the first chuck head 19.2 and the second chuck head 22.2 to be V-shaped, the clamping of cylindrical rods can be adapted between the two first chuck heads 19.2, and the clamping of circular impact members is applicable between the two second chuck heads 22.2, thereby improving the stability of the rods and impact members during the processing, enabling the impact members to be supported both axially and radially. By providing an opening on the clamping end of the first chuck head 19.2, the second guiding and positioning chuck 22 can be fully retracted into the first guiding and positioning chuck 19 without affecting the use of the first guiding and positioning chuck 19.

[0053] Referring to Figure 4 and Figure 5 As shown, the track mechanism includes two first cross rails 8, two clamping plates 9, and two second cross rails 10 that are respectively oppositely arranged. The first cross rail 8 is hingedly connected to the clamping plate 9, and the two second cross rails 10 and the two first cross rails 8 are symmetrically arranged along the longitudinal center line of the base 1; first grooves 8.1 adapted to the sliding part 19.1 are oppositely arranged on the inner sides of the two first cross rails 8, and second grooves 10.1 adapted to the sliding part 19.1 are oppositely arranged on the inner sides of the two second cross rails 10. Specifically, the two first cross rails 8 are symmetrically arranged along the horizontal center line of the base 1, the two second cross rails 10 are symmetrically arranged along the horizontal center line of the base 1, the first cross rail 8 and the second cross rail 10 are in the same horizontal plane and are symmetrically arranged with respect to the longitudinal center line of the base 1, and there is a certain distance between the first cross rail 8 and the second cross rail 10. Both the first cross rail 8 and the second cross rail 10 are connected to the base 1 through angle irons 18 and are fixed with hexagon bolts at the connection points. The sliding parts 19.1 of the first guiding and positioning chucks 19 are respectively adapted to the first grooves 8.1 and the second grooves 10.1, enabling the sliding parts 19.1 to move along the first grooves 8.1 and the second grooves 10.1, that is, the first cross rail 8 and the second cross rail 10 respectively have a guiding effect on the two corresponding first guiding and positioning chucks 19. Round holes are provided at the ends of the sliding parts 19.1 for connecting with the link mechanism. After being connected to the link mechanism, the thickness should be less than the thickness of the sliding part 19.1, specifically not exceeding the thickness of the groove formed by the sliding part 19.1, so as not to affect the normal movement of the sliding part 19.1.

[0054] To ensure the normal movement of the first guiding and positioning chuck 19, referring to Figure 4 and Figure 5As shown, the induction control mechanism further includes a first limit sensor 12 and a second limit sensor 13, which are respectively arranged on the first cross rail 8 and the second cross rail 10. Both the first limit sensor 12 and the second limit sensor 13 are connected to the input end of the control device 24. The first limit sensor 12 is arranged at the end of the first groove 8.1, and the second limit sensor 13 is arranged at the end of the second groove 10.1. The first limit sensor 12 and the second limit sensor 13 respectively transmit the displacement signals of the first guiding and positioning chuck 19 connected thereto. Specifically, the first limit sensor 12 and the second limit sensor 13 are respectively used to sense the position of the first guiding and positioning chuck 19 moving along the first cross rail 8 and the second cross rail 10. When the first guiding and positioning chuck 19 moves to the limit position, the first limit sensor 12 and the second limit sensor 13 send signals to the control device 24 to manually stop the rotation of the link mechanism so that the first guiding and positioning chuck 19 stops moving.

[0055] Referring to Figure 7 As shown, the link mechanism includes a first link 27, a driving rod 25, a long link 28, a fork link 29 and a second link 30 connected in sequence; the driving rod 25 is perpendicular to the base 1 and is arranged between the two clamping plates 9. On one side of the two clamping plates 9 facing the driving rod 25, a first gear 17 is arranged, and on both sides of the driving rod 25 facing the two clamping plates 9, a second gear 26 meshing with the first gear 17 is arranged; the connecting ends of the two first guiding and positioning chucks 19 are respectively connected to the first link 27 and the second link 30. The first link 27 is arranged between the two first cross rails 8, and the second link 30 and the fork link 29 are arranged between the two second cross rails 10. Specifically, the first gear 17 meshes with the second gear 26, so that the driving rod 25 cannot rotate randomly between the two clamping plates 9 and can only rotate when subjected to an external force. One end of the first link 27 is connected to the driving rod 25, and the other end is connected to the first guiding and positioning chuck placed between the two first cross rails 8. One end of the second link 30 is connected to the fork link 29, and the other end is connected to the first guiding and positioning chuck placed between the two second cross rails 10. The long link 28 is used to connect the driving rod 25 and the fork link 29. When the driving rod 25 rotates, when the driving rod 25 rotates clockwise, the first link 27 and the second link 30 drive the two first guiding and positioning chucks 19 to move towards each other, and when the driving rod 25 rotates counterclockwise, the first link 27 and the second link 30 drive the two first guiding and positioning chucks 19 to move away from each other.

[0056] Furthermore, referring to Figure 4As shown, the locking mechanism includes a pressing handle 14, a locking shaft 15, and a pin shaft 16. The locking shaft 15 passes through the two clamping plates 9 and the driving rod 25. The pressing handle 14 includes a connected cam and a rotating handle. The cam is arranged at one end of the locking shaft 15 through the pin shaft 16 and can rotate along the pin shaft 16. The pin shaft 16 is arranged deviating from the center of the cam. By driving the rotating handle, the cam is driven to rotate along the pin shaft 16 to drive the two clamping plates 9 to clamp or release. Specifically, the driving rod 25 is arranged on the locking shaft 15, and the locking shaft 15 passes through the two clamping plates 9. The clamping plate 9 is connected to the first cross rail 8 through a hinge 11. One end of the locking shaft 15 extends out of one side of the clamping plate 9, and a through hole is provided at the extending end, so that the pin shaft 16 passes through the through hole to connect the pressing handle 14 and the locking shaft 15. The pin shaft 16 is arranged deviating from the center of the cam, so that when the cam rotates, the distance between the center of the pin shaft 16 and the clamping plate 9 changes accordingly. Initially, the rotating handle of the pressing handle 14 is arranged close to the clamping plate 9. At this time, the distance between the two clamping plates 9 is the largest, and the clamping plate 9 is in a released state for the driving rod 25. When the rotating handle is pushed to rotate to be perpendicular to the clamping plate 9, the distance between the two clamping plates 9 is the smallest at this time. During this rotation process, the distance between the center of the pin shaft 16 and the clamping plate 9 gradually increases, and the distance between the two clamping plates 9 gradually decreases. The two clamping plates 9 clamp the driving rod 25, so that the link mechanism no longer rotates, and the two first guiding and positioning chucks 19 no longer move. Continuing to push the rotating handle until the rotating handle fits the clamping plate 9 again. During this rotation process, the distance between the center of the pin shaft 16 and the clamping plate 9 gradually decreases, the distance between the two clamping plates 9 gradually increases, and the two clamping plates 9 gradually release the driving rod 25, so that the two first guiding and positioning chucks 19 can continue to move driven by the link mechanism.

[0057] Referring to Figure 2 and Figure 3As shown, the base 1 includes a bottom plate 3 and four hoof feet 2. Slots adapted for the link mechanism to pass through are provided at both ends of the bottom plate 3. The hoof foot 2 includes a hoof foot seat 6, a threaded rod 4, and a shock pad 5. Threaded holes are provided at the four corners of the bottom plate 3, and the four threaded rods 4 are respectively threadedly connected to the four threaded holes. The hoof foot seat 6 is arranged at the bottom of the threaded rod 4, and the shock pad 5 is arranged at the bottom of the hoof foot seat 6. A third groove is provided at the top of the threaded rod 4. The number of inclination sensors 7 is the same as that of the threaded rods 4, and the four inclination sensors 7 are respectively arranged in the four third grooves. Specifically, the base 1 is used to support and fix each component of the alignment and clamping device for the link of the split Hopkinson device. Slots are provided at both ends of the bottom plate 3. The long link 28 is arranged at the bottom of the bottom plate 3. The driving rod 25 and the fork-shaped link 29 respectively pass through the two slots and are connected to the long link 28. The hoof foot 2 has the function of shockproof support. By providing the threaded rod 4, the height of the bottom plate 3 can be freely adjusted. The hoof foot seat 6 is provided to increase the contact area between the threaded rod 4 and the ground, improving the stability of the base 1. The shock pad 5 is arranged at the bottom of the hoof foot seat 6 to prevent vibration, further improving the stability of the base 1. Four inclination sensors 7 are provided and are respectively arranged in the third grooves at the tops of the four threaded rods 4, used to feedback the relative positions of the inclination sensors 7 to the control device to monitor whether the bottom plate 3 is in a horizontal state.

[0058] Referring to Figure 6 As shown, the second anti-friction mechanism 22.3 includes a second cage 22.31 and a plurality of second balls 22.32. The plurality of second balls 22.32 are arranged at intervals in the second cage 22.31, and the plurality of second balls 22.32 are in contact with the impact member. Specifically, the second cage 22.31 is embedded in the clamping end of the second column head 22.2. The plurality of second balls 22.32 are arranged at intervals in the second cage 22.31 to prevent the plurality of second balls 22.32 from colliding and rubbing against each other during operation. When the two second column heads 22.2 move towards each other until they are in contact with the impact member, at this time, the plurality of second balls 22.32 are in contact with the impact member, thereby reducing the friction between the second column head 22.2 and the impact member. At the same time, the second balls 22.32 are provided to facilitate the movement of the impact member.

[0059] In the second aspect of this embodiment, a method for using an alignment and clamping device for the link of a split Hopkinson device is provided, which is completed based on the above-mentioned alignment and clamping device for the link of a split Hopkinson device. The rods of the split Hopkinson device include a driving rod, an incident rod, and a transmission rod that are arranged in sequence and at intervals. The driving rod drives the incident rod to move towards the transmission rod. An impact member is arranged between the incident rod and the transmission rod. Of course, the driving rod can also be called an impact rod. The method for use includes the following steps:

[0060] S1. Position the alignment and clamping devices for the connecting rods of the two split Hopkinson devices at the positions between the driving rod and the incident rod, and between the incident rod and the transmission rod respectively, so as to complete the alignment between the driving rod and the incident rod, and the alignment between the incident rod and the transmission rod simultaneously.

[0061] S2. Adjust the base 1 according to the inclination signal of the base 1 fed back by the inclination sensor 7 to the control device 24, so that the base 1 remains horizontal. Specifically, adjust the threaded rod 4 to adjust the height of the bottom plate 3.

[0062] S3. Rotate the connecting rod mechanisms on the two alignment and clamping devices for the connecting rods of the split Hopkinson devices, and drive the two first guiding and positioning chucks 19 on the two alignment and clamping devices for the connecting rods of the split Hopkinson devices to move towards the driving rod and the incident rod, and the incident rod and the transmission rod respectively. According to the position signals of the horizontal movement of the two first guiding and positioning chucks 19 fed back by the first position sensor 20 to the control device 24, adjust the connecting rod mechanism to achieve the alignment between the driving rod and the incident rod, and the alignment between the incident rod and the transmission rod. After alignment, drive the locking mechanism to lock the connecting rod mechanism. Specifically, rotate the driving rods 25 in the two devices. When the driving rods 25 rotate clockwise, the first connecting rods 27 and the second connecting rods 30 drive the two first guiding and positioning chucks 19 to move towards each other. According to the position signals of the horizontal movement of the two first guiding and positioning chucks 19 fed back by the first position sensor 20 to the control device 24, continue to rotate the driving rods 25, so that the two first guiding and positioning chucks 19 continue to move until the driving rod and the incident rod are aligned, and the incident rod and the transmission rod are aligned. After alignment, push the rotating handles in the two devices to rotate until they are perpendicular to the clamping plates 9. At this time, the distance between the two clamping plates 9 is the smallest, and the two clamping plates 9 clamp the driving rods 25, so that the connecting rod mechanism no longer rotates, and the two first guiding and positioning chucks 19 no longer move.

[0063] S4. The control device 24 on the alignment and clamping device for the connecting rods of the split Hopkinson device located between the incident rod and the transmission rod controls the driving member 23 to drive, and drives the two second guiding and positioning chucks 22 to move towards the impact member. According to the position signals of the horizontal movement of the two second guiding and positioning chucks 22 fed back by the second position sensor 21, the control device 24 adjusts the driving member 23 to drive the two second guiding and positioning chucks 22 to move towards the impact member, so that the impact member is aligned with the transmission rod. After alignment, apply an external force to the impact member, and the impact member moves towards the transmission rod driven by the second anti-friction mechanism 22.3. Specifically, the impact member moves towards the transmission rod driven by the second balls 22.32 and is fixed to the end of the transmission rod. The control device 24 controls the driving member 23 to retract, and drives the two second guiding and positioning chucks 22 to move away from the impact member.

[0064] Among them, the centering and clamping device for the connecting rod of the split Hopkinson device for the centering of the incident rod and the transmission rod is not taken out after centering and is taken out until the end of the test, while the centering and clamping device for the connecting rod of the split Hopkinson device for the centering of the driving rod and the incident rod is taken out after centering.

[0065] It can be seen that the centering and clamping device for the connecting rod of the split Hopkinson device provided in this embodiment is applicable to both the centering of the incident rod and the transmission rod of the split Hopkinson device and the centering of the driving rod and the incident rod of the split Hopkinson device, has universality, does not require the design of two centering devices, and does not need to specifically distinguish between the two centering devices.

[0066] It should be noted that in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising one..." does not exclude the existence of additional identical elements in the process, method, article or device comprising the said element.

[0067] The above are only specific embodiments of the present invention, enabling those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments described herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A split Hopkinson equipment connecting rod alignment clamping device, characterized in that: include: Base (1); A positioning chuck assembly, the positioning chuck assembly comprising two first guide positioning chucks (19) for clamping a rod of the split Hopkinson device, the clamping ends of the two first guide positioning chucks (19) are both provided with a first anti-friction mechanism (19.3), the interiors of the two first guide positioning chucks (19) are both provided with a driving member (23) and a second guide positioning chuck (22) for clamping an impact member of the split Hopkinson device, the first guide positioning chuck (19) comprising a sliding portion (19.1) and a first column head (19.2), the clamping end of the first column head (19.2) An opening is provided on the upper surface for the second guide positioning chuck (22) to extend out, the clamping end of the first column head (19.2) and the clamping end of the second column head (22.2) are both V-shaped, the second guide positioning chuck (22) comprises a connecting rod (22.1) and a second column head (22.2), a second anti-friction mechanism (22.3) is provided on the clamping end of the second column head (22.2), an end of the connecting rod (22.1) away from the second column head (22.2) is connected to the driving member (23), and the driving member (23) drives the second guide positioning chuck (22) to reciprocate; A track mechanism, the track mechanism being arranged on the base (1); a connecting rod mechanism, the connecting rod mechanism being arranged inside the track mechanism and being used to connect the two first guide positioning chucks (19), and driving the connecting rod mechanism to drive the two first guide positioning chucks (19) to move towards or away from each other along the extension direction of the track mechanism; A locking mechanism, wherein the locking mechanism is arranged on the outer surface of the track mechanism, and the locking mechanism is driven to drive the track mechanism to clamp or release, so as to clamp or release the connecting rod mechanism; The induction control mechanism comprises an inclination sensor (7), a first position sensor (20), a second position sensor (21) and a control device (24), wherein the inclination sensor (7) is arranged on the base (1) and is used to transmit an inclination signal of the base (1), the first position sensor (20) is arranged on the first guide positioning chuck (19) and is used to transmit a position signal of horizontal movement of the first guide positioning chuck (19), the second position sensor (21) is arranged on the second guide positioning chuck (22) and is used to transmit a position signal of horizontal movement of the second guide positioning chuck (22), and the control device (24) receives and feeds back the inclination signal and the position signal.

2. A split Hopkinson equipment connecting rod alignment clamping device according to claim 1, characterized in that: The two ends of the sliding part (19.1) are respectively connected to the connecting rod mechanism and the first column head (19.2), and the first anti-friction mechanism (19.3) and the first position sensor (20) are both arranged at the clamping end of the first column head (19.2).

3. A split Hopkinson equipment connecting rod alignment clamping device according to claim 2, characterized in that: The track mechanism comprises two first transverse rails (8), two clamping plates (9) and two second transverse rails (10) which are arranged opposite to each other, the first transverse rail (8) is hingedly connected to the clamping plates (9), and the two second transverse rails (10) and the two first transverse rails (8) are symmetrically arranged along the longitudinal midline of the base (1); First grooves (8.1) adapted to the sliding portion (19.1) are arranged oppositely on the inner sides of the two first transverse rails (8), and second grooves (10.1) adapted to the sliding portion (19.1) are arranged oppositely on the inner sides of the two second transverse rails (10).

4. A split Hopkinson equipment connecting rod alignment clamping device according to claim 3, characterized in that: The induction control mechanism further comprises a first limit sensor (12) and a second limit sensor (13). The first limit sensor (12) and the second limit sensor (13) are respectively arranged on the first cross rail (8) and the second cross rail (10), and are both connected to the input end of the control device (24). The first limit sensor (12) is arranged at the end of the first groove (8.1), and the second limit sensor (13) is arranged at the end of the second groove (10.1). The first limit sensor (12) and the second limit sensor (13) respectively transmit displacement signals of the first guide positioning chuck (19) connected thereto.

5. The split Hopkinson equipment connecting rod alignment clamping device according to claim 3 is characterized in that: The connecting rod mechanism comprises a first connecting rod (27), an active rod (25), a long connecting rod (28), a fork-shaped connecting rod (29), and a second connecting rod (30) which are connected in sequence; The active rod (25) is arranged perpendicular to the base (1) and between the two clamping plates (9); a first gear (17) is arranged on one side of the two clamping plates (9) facing the active rod (25); and a second gear (26) meshing with the first gear (17) is arranged on both sides of the active rod (25) facing the two clamping plates (9); The connecting ends of the two first guide positioning clamps (19) are respectively connected to the first connecting rod (27) and the second connecting rod (30); the first connecting rod (27) is arranged between the two first cross rails (8); and the second connecting rod (30) and the fork-shaped connecting rod (29) are arranged between the two second cross rails (10).

6. A split Hopkinson equipment connecting rod alignment clamping device according to claim 5, characterized in that: The locking mechanism comprises a pressing handle (14), a locking shaft (15) and a pin shaft (16); the locking shaft (15) passes through the two clamping plates (9) and the active rod (25); The pressing handle (14) comprises a cam and a rotating handle which are connected to each other. The cam is arranged at one end of the locking shaft (15) via the pin shaft (16) and can rotate along the pin shaft (16). The pin shaft (16) is arranged offset from the center of the cam. The rotating handle is driven to drive the cam to rotate along the pin shaft (16) to drive the two clamping plates (9) to clamp or release.

7. A split Hopkinson equipment connecting rod alignment clamping device according to claim 1, characterized in that: The base (1) comprises a bottom plate (3) and four shoe feet (2); both ends of the bottom plate (3) are provided with slots suitable for the connecting rod mechanism to pass through; The shoe foot (2) comprises a shoe foot seat (6), a threaded rod (4) and a shockproof pad (5); threaded holes are provided at four corners of the bottom plate (3); the four threaded rods (4) are respectively threadedly connected to the four threaded holes; the shoe foot seat (6) is arranged at the bottom of the threaded rod (4); and the shockproof pad (5) is arranged at the bottom of the shoe foot seat (6); A third groove is provided at the top of the threaded rod (4); the number of the inclination sensors (7) is the same as the number of the threaded rods (4); and four of the inclination sensors (7) are respectively arranged in four of the third grooves.

8. The split Hopkinson equipment connecting rod alignment clamping device according to claim 1, characterized in that: The first anti-friction mechanism (19.3) comprises a first retaining frame (19.31) and a plurality of first rolling balls (19.32), the plurality of first rolling balls (19.32) being arranged in the first retaining frame (19.31) at intervals, and the plurality of first rolling balls (19.32) being in contact with the rod; The second anti-friction mechanism (22.3) comprises a second retaining frame (22.31) and a plurality of second rolling balls (22.32); the plurality of second rolling balls (22.32) are arranged in the second retaining frame (22.31) at intervals, and the plurality of second rolling balls (22.32) are in contact with the impact member.

9. A method for using a split Hopkinson device connecting rod alignment clamping device, which is based on a split Hopkinson device connecting rod alignment clamping device as described in any one of claims 1 to 8, wherein the rod of the split Hopkinson device comprises a driving rod, an incident rod and a transmission rod arranged in sequence and at intervals, wherein the driving rod drives the incident rod to move toward the transmission rod, and an impact member is arranged between the incident rod and the transmission rod, and characterized in that: The method of use comprises the following steps: S1, setting two separate Hopkinson device connecting rod alignment clamping devices at the position between the driving rod and the incident rod, and at the position between the incident rod and the transmission rod respectively; S2, adjusting the base (1) according to the tilt signal of the base (1) fed back to the control device (24) by the tilt sensor (7) so that the base (1) remains horizontal; S3, rotating the connecting rod mechanism on the two separate Hopkinson device connecting rod alignment clamping devices, respectively driving the two first guide positioning clamps (19) on the two separate Hopkinson device connecting rod alignment clamping devices to move toward the driving rod and the incident rod, and the incident rod and the transmission rod, respectively; adjusting the connecting rod mechanism according to the position signal of the horizontal movement of the two first guide positioning clamps (19) fed back to the control device (24) by the first position sensor (20) to achieve the centering of the driving rod and the incident rod, and the centering of the incident rod and the transmission rod; after the centering, driving the locking mechanism to lock the connecting rod mechanism; S4. The control device (24) on the split-type Hopkinson device connecting rod alignment clamping device located between the incident rod and the transmission rod controls the driving of the driving member (23) to drive the two second guide positioning chucks (22) to move toward the impact member. According to the position signal of the horizontal movement of the two second guide positioning chucks (22) fed back by the second position sensor (21), the control device (24) adjusts the driving member (23) to drive the two second guide positioning chucks (22) to move toward the impact member so that the impact member is centered with the transmission rod. After the centering, an external force is applied to the impact member. The impact member moves toward the transmission rod under the drive of the second anti-friction mechanism (22.3) and is fixed to the end of the transmission rod. The control device (24) controls the retraction of the driving member (23) to drive the two second guide positioning chucks (22) to move in a direction away from the impact member.

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