A high speed tensile testing device

Abstract

The application provides a high-speed tensile test device, and belongs to the technical field of tension measurement. The device comprises an acceleration cage assembly and a conical chuck assembly. The acceleration cage assembly is internally provided with a moving space for the up-and-down movement of the conical chuck assembly. The bottom of the acceleration cage assembly is provided with a conical table through hole that is inclined from top to bottom towards the inside. The conical chuck assembly is provided in a conical table shape corresponding to the conical through hole. The conical chuck assembly is internally provided with a groove gap for clamping a sample. The conical chuck assembly is placed in the inside of the acceleration cage assembly through cooperation with the conical table through hole structure of the acceleration cage assembly. The high-speed tensile test device can eliminate test errors caused by factors such as the gap between the clamp and the sample, and continuously and effectively lock the sample during the test process. In the acceleration process, the acceleration distance can be provided to ensure the accuracy of the test speed.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of tensile force measurement, and particularly relates to a high-speed tensile test device. BACKGROUND

[0002] At present, the existing high-speed tensile test device generally adopts a sleeve integrated forming tool or a pin connecting sample piece mode to perform tensile test. However, both test modes have an undesirable clamping effect, and there is a gap between the sample piece and the clamping section, thereby causing invalid slip in the test process, and the low clamping force causes the high-strength sample piece to be unable to be effectively clamped. In addition, since the existing high-speed tensile test device does not have an acceleration function, the loading speed of the clamp cannot be guaranteed. Therefore, there is an urgent need for a high-speed tensile test device with good clamping effect and acceleration function. SUMMARY

[0003] Therefore, the present application aims to provide a high-speed tensile test device to ensure the loading speed in the test process by accelerating the distance, and to meet the high-speed tensile test of different types of materials.

[0004] To achieve the above-mentioned purpose, the technical scheme of the present application is as follows:

[0005] A high-speed tensile test device, comprising an acceleration cage assembly and a conical chuck assembly,

[0006] The inside of the acceleration cage assembly is provided with a moving space for the conical chuck assembly to move up and down; the bottom of the acceleration cage assembly is provided as a circular conical table through hole inclined from top to bottom to the inside;

[0007] The conical chuck assembly is provided in a circular conical shape corresponding to the conical through hole; the inside of the conical chuck assembly has a groove gap for clamping the sample piece;

[0008] The conical chuck assembly is placed in the inside of the acceleration cage assembly by cooperating with the conical table through hole structure of the acceleration cage assembly.

[0009] Further, the acceleration cage assembly comprises an acceleration cage upper end, an acceleration cage lower end and a connecting rod,

[0010] The connecting rod is arranged between the acceleration cage upper end and the acceleration cage lower end;

[0011] The circular conical table through hole is arranged at the middle part of the acceleration cage lower end.

[0012] Further, the acceleration cage assembly further comprises a fixing bolt arranged at the corresponding position of the connecting rod at the top of the acceleration cage upper end and the bottom of the acceleration cage lower end,

[0013] The connecting rod is provided with threaded holes at both ends, which are used to fix the connecting rod between the upper end of the acceleration cage and the lower end of the acceleration cage through the fixing bolts.

[0014] Further, the acceleration cage assembly further comprises a protection rod, which is arranged between the upper end of the acceleration cage and the lower end of the acceleration cage, and is used to limit the vertical direction of the taper chuck assembly together with the connecting rod.

[0015] Further, the taper chuck assembly comprises a taper chuck component and a wedge-shaped block,

[0016] The outer side of the taper chuck component is a circular truncated cone shape corresponding to the through hole of the taper platform, and the inside of the taper chuck component has an opening, and the inner side surface of the opening has a first inclined surface inclined inward from top to bottom;

[0017] The wedge-shaped blocks are arranged in pairs in the opening on the inner side of the taper chuck component, and the surface of the wedge-shaped blocks in contact with the taper head component is a second inclined surface corresponding to the first inclined surface, wherein the gap formed between the two wedge-shaped blocks is used to clamp the sample.

[0018] Further, the taper chuck assembly further comprises a fastening bridge and a locking bolt,

[0019] The fastening bridge is arranged on the top of the wedge-shaped block;

[0020] The taper chuck component is provided with a threaded hole;

[0021] The fastening bridge is provided with a through hole corresponding to the threaded hole on the taper chuck component;

[0022] The fastening bridge and the taper chuck component are fixed by the locking bolt, and the wedge-shaped block is limited.

[0023] Further, the taper chuck assembly further comprises an inner clamping block, which is embedded on the side of the wedge-shaped block in contact with the sample; wherein the side of the inner clamping block in contact with the sample is provided with an anti-skid surface.

[0024] Further, the taper chuck assembly further comprises a clamping bolt;

[0025] The wedge-shaped block is provided with a threaded hole, which can pass through the two wedge-shaped blocks, and is used to clamp the sample by the clamping bolt.

[0026] Further, it further comprises an energy absorption device arranged at the top and bottom of the moving space.

[0027] Further, the energy absorption device comprises a first anti-collision block, a second anti-collision block, a third anti-collision block and a fourth anti-collision block,

[0028] The first anti-collision block is arranged at the bottom of the upper end of the acceleration cage.

[0029] The second anti-collision block is arranged at the top of the fastening bridge.

[0030] The third anti-collision block is arranged at the top of the conical chuck part, and the upper plane thereof is aligned with the upper plane of the fastening bridge.

[0031] The fourth anti-collision block is arranged at the top of the third anti-collision block, and the upper plane thereof is aligned with the upper plane of the first anti-collision block.

[0032] Further, the acceleration cage assembly further comprises a connecting thread and a fixing screw ring,

[0033] The connecting thread is arranged at the top of the acceleration cage assembly and is used for being connected with a dynamic execution part of a testing machine.

[0034] The fixing screw ring is arranged in cooperation with the connecting thread and is used for locking the acceleration cage assembly with the dynamic execution part of the testing machine.

[0035] Compared with the prior art, the high-speed tensile testing device has the following beneficial effects:

[0036] The high-speed tensile testing device can eliminate the test error caused by the gap between the clamp and the sample and continuously and effectively lock the sample during the test. In the acceleration process, the acceleration distance can be provided to ensure the accuracy of the test speed. BRIEF DESCRIPTION OF DRAWINGS

[0037] The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the application, and are incorporated herein for purposes of illustrating the illustrative embodiments of the present application and the explanations provided herein are made with respect to the accompanying drawings. In the drawings:

[0038] Figure 1 FIG. 1 is a schematic view of a high-speed tensile testing device according to an embodiment of the present application;

[0039] Figure 2 FIG. 2 is a sectional view of the high-speed tensile testing device according to the embodiment of the present application.

[0040] Legend of reference signs:

[0041] 1- connecting thread; 2- fixing screw; 3- fixing bolt; 4- accelerating cage upper end; 5- connecting rod; 6- accelerating cage lower end; 7- protection rod; 8- conical chuck component; 9- first anti-collision block; 10- second anti-collision block; 11- fastening bridge; 12- third anti-collision block; 13- fourth anti-collision block; 14- inner clamping block; 15- wedge block; 16- clamping bolt; 17- locking bolt. DETAILED DESCRIPTION

[0042] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0043] The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0044] As shown in Figure 1 and Figure 2 , Figure 1 is a schematic view of a high-speed tensile test device according to an embodiment of the present application; Figure 2 is a sectional view of a high-speed tensile test device according to an embodiment of the present application.

[0045] The high-speed tensile test device according to the present application comprises an accelerating cage assembly and a conical chuck assembly,

[0046] The accelerating cage assembly is internally provided with a moving space for the up-and-down movement of the conical chuck assembly; the bottom of the accelerating cage assembly is provided as a conical frustum through-hole that is inclined from top to bottom towards the inside;

[0047] The conical chuck assembly is provided in a conical frustum shape corresponding to the conical through-hole; the inside of the conical chuck assembly has a groove gap for clamping a sample;

[0048] The conical chuck assembly is placed in the inside of the accelerating cage assembly by cooperating with the conical frustum through-hole structure of the accelerating cage assembly.

[0049] It should be noted that the conical chuck assembly cannot immediately reach the set speed when the high-speed tensile test device is first operated. To this end, since the conical chuck assembly is placed in the inside of the accelerating cage assembly by the way of contacting the conical chuck assembly with the inclined surface that is inclined from top to bottom towards the inside, the conical chuck assembly can move up and down in the inside of the accelerating cage assembly. Therefore, the conical chuck assembly is accelerated by the moving space in the accelerating cage assembly, so as to ensure the speed stability during the test process.

[0050] In one embodiment of the present application, when a 100N pre-tension is required to be applied to the sample and the sample is stretched at a high speed of 2m / s, the sample is first installed in the conical head chuck assembly, and the acceleration cage assembly is slowly moved upward by the dynamic execution part of the testing machine until the contact force between the inner bottom side of the acceleration cage assembly and the conical head chuck assembly is 100N, and the testing machine execution part takes this point as the starting point of stretching, and after the acceleration cage moves downward by a certain distance, the acceleration cage moves upward, and the acceleration cage increases the speed from 0m / s to 2m / s in this distance, and the sample is broken. However, the present application does not make any limitation on the speed of high-speed tensile test and the pre-tension applied, which can be set according to actual needs.

[0051] The acceleration cage assembly comprises an acceleration cage upper end 4, an acceleration cage lower end 6 and a connecting rod 5,

[0052] The connecting rod 5 is arranged between the acceleration cage upper end 4 and the acceleration cage lower end 6.

[0053] The conical frustum through hole is arranged at the middle part of the acceleration cage lower end 6.

[0054] The acceleration cage assembly further comprises a fixing bolt 3 arranged at the top of the acceleration cage upper end 4 and the bottom of the acceleration cage lower end 6 corresponding to the connecting rod 5,

[0055] The two ends of the connecting rod 5 are provided with threaded holes for fixing the connecting rod 5 between the acceleration cage upper end 4 and the acceleration cage lower end 6 by the fixing bolt 3.

[0056] It should be noted that the connecting rod 5 is arranged at the opposite two side ends of the acceleration cage assembly and is fixed by the fixing bolt 3. Since the connecting rod 5 needs to bear the pre-tension of the acceleration cage lower end 6 and the impact force of the conical head chuck assembly on the acceleration cage upper end 4 after breaking the sample, multiple connecting rods 5 can be arranged to bear the larger tension between the acceleration cage upper end 4 and the lower end.

[0057] In one embodiment of the present application, three connecting rods 5 can be arranged at the opposite two side ends of the acceleration cage assembly. However, the present application does not make any limitation on the material and the number of the connecting rods 5, and the corresponding number of connecting rods 5 can be arranged according to the actual situation.

[0058] The acceleration cage assembly further comprises a protection rod 7 arranged between the acceleration cage upper end 4 and the acceleration cage lower end 6 for limiting the vertical direction of the conical chuck assembly together with the connecting rod 5.

[0059] It should be noted that the protection rod 7 is used to place the conical head chuck assembly flying out during the high-speed tensile test.

[0060] In one embodiment of the present invention, the protective rod 7 has a thread only at its upper end, which is used to engage with and fix it in the threaded hole provided at the upper end 4 of the acceleration cage, while the lower end of the protective rod 7 is clearance-fitted with the through hole provided at the lower end 6 of the acceleration cage, thereby facilitating the installation of the conical chuck component 8 into the acceleration cage.

[0061] In another embodiment of the present invention, the protective rod 7 has a thread only at its lower end, which is used to engage with the threaded hole provided at the lower end 6 of the acceleration cage for fixation, while the upper end of the protective rod 7 is clearance-fitted with the through hole provided at the upper end 4 of the acceleration cage, thereby facilitating the installation of the conical chuck component 8 into the acceleration cage.

[0062] In another embodiment of the present invention, the upper and lower ends of the protective rod 7 are threaded to cooperate with the threaded holes provided on the upper end 4 and the lower end 6 of the acceleration cage for fixation. This allows the protective rod 7 to be installed first, and the relative distance between the upper end 4 and the lower end 6 of the acceleration cage to be defined, which facilitates the installation of the connecting rod 5.

[0063] The conical chuck assembly includes a conical chuck component 8 and a wedge block 15.

[0064] The outer side of the conical chuck component 8 is a truncated cone shape corresponding to the conical through hole. The interior of the conical chuck component 8 has a hollowed-out shape, and the inner side of the hollowed-out shape has a first inclined surface that slopes inward from top to bottom.

[0065] The wedge blocks 15 are arranged in pairs in the hollow inside the conical chuck component 8. The surface of the wedge block 15 that contacts the conical chuck component is a second inclined surface corresponding to the first inclined surface. The gap formed between the two wedge blocks 15 is used to clamp the sample.

[0066] The tapered chuck assembly also includes a fastening bridge 11 and a locking bolt 17.

[0067] The fastening bridge 11 is disposed on the top of the wedge block 15;

[0068] The tapered chuck component 8 is provided with a threaded hole;

[0069] The fastening bridge 11 is provided with a through hole, which corresponds to the threaded hole on the tapered chuck component 8;

[0070] The fastening bridge 11 is fixed to the conical chuck component 8 by the locking bolt 17, and the wedge block 15 is limited.

[0071] The conical chuck assembly also includes an inner clamping block 14, which is embedded in the side of the wedge block 15 that contacts the sample; wherein the side of the inner clamping block 14 that contacts the sample is provided as an anti-slip surface.

[0072] It should be noted that the anti-slip surface of the inner block is mainly used to increase the friction between the inner block and the sample, thereby clamping the sample and ensuring effective clamping of the high-strength sample during the high-speed tensile test.

[0073] The tapered chuck assembly also includes a clamping bolt 16;

[0074] The wedge block 15 is provided with a threaded hole, which can pass through two wedge blocks 15, and is used to clamp the sample by the clamping bolt 16.

[0075] It should be noted that the clamping bolt 16 can eliminate the gap between the sample and the high-speed tensile testing device, thereby effectively clamping the high-strength sample and meeting the requirements for high-speed tensile testing of different types of materials.

[0076] The high-speed tensile testing device of the present invention further includes an energy absorption device disposed at the top and bottom of the moving space.

[0077] The energy-absorbing device includes a first anti-collision block 9, a second anti-collision block 10, a third anti-collision block 12, and a fourth anti-collision block 13.

[0078] The first anti-collision block 9 is disposed at the bottom of the upper end 4 of the acceleration cage;

[0079] The second anti-collision block 10 is disposed on the top of the fastening bridge 11;

[0080] The third anti-collision block 12 is disposed on the top of the conical clamp component 8, and its upper plane is aligned with the upper plane of the fastening bridge 11;

[0081] The fourth anti-collision block 13 is disposed on top of the third anti-collision block 12, and its upper surface is aligned with the upper surface of the first anti-collision block 9.

[0082] It should be noted that the first anti-collision block 9 can be made of nylon, the second anti-collision block 10 and the fourth anti-collision block 13 can be made of rubber, and the third anti-collision block 12 can be made of aluminum alloy. The first anti-collision block 9, the second anti-collision block 10, the third anti-collision block 12 and the fourth anti-collision block 13 are used to absorb the impact force of the conical chuck assembly hitting the upper end 4 of the acceleration cage after the sample is broken.

[0083] The acceleration cage assembly also includes a connecting thread 1 and a fixing screw ring 2.

[0084] The connecting thread 1 is provided on the top of the acceleration cage assembly and is used to connect with the dynamic execution part of the testing machine;

[0085] The fixing screw ring 2 is configured to cooperate with the connecting screw ring to lock the acceleration cage assembly to the dynamic execution part of the testing machine.

[0086] Those skilled in the art will recognize that the units and method steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components and steps of the various examples have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this invention.

[0087] In the several embodiments provided in this application, it should be understood that the disclosed methods and systems can be implemented in other ways. For example, the division of units described above is merely a logical functional division, and in actual implementation, there may be other division methods. For instance, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. The aforementioned units may or may not be physically separated. The components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of the embodiments of the present invention according to actual needs.

[0088] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

[0089] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A high-speed tensile testing device, characterized in that: Including the acceleration cage assembly and the conical chuck assembly, The acceleration cage assembly has an internal moving space for the tapered chuck assembly to move up and down; the bottom of the acceleration cage assembly is a truncated cone-shaped through hole that slopes inward from top to bottom. The conical chuck assembly is configured with a frustum shape corresponding to the frustum through hole; the conical chuck assembly has a groove gap inside for clamping the sample; The conical chuck assembly is placed inside the acceleration cage assembly by cooperating with the conical through-hole structure of the acceleration cage assembly; The acceleration cage assembly includes an upper acceleration cage (4), a lower acceleration cage (6), and a connecting rod (5). The connecting rod (5) is disposed between the upper end (4) of the acceleration cage and the lower end (6) of the acceleration cage; The truncated cone through hole is located in the middle of the lower end (6) of the acceleration cage; The acceleration cage assembly also includes fixing bolts (3), which are disposed at the top of the upper end (4) of the acceleration cage and at the bottom of the lower end (6) of the acceleration cage, corresponding to the connecting rod (5). The connecting rod (5) has threaded holes at both ends, which are used to fix the connecting rod (5) between the upper end (4) of the acceleration cage and the lower end (6) of the acceleration cage by means of the fixing bolt (3); The acceleration cage assembly also includes a protective rod (7), which is disposed between the upper end (4) and the lower end (6) of the acceleration cage, and is used together with the connecting rod (5) to limit the conical chuck assembly in the vertical direction. The conical chuck assembly includes a conical chuck component (8) and a wedge block (15). The outer side of the conical chuck component (8) is a truncated cone shape corresponding to the truncated cone through hole. The interior of the conical chuck component (8) has a hollowed-out shape, and the inner side of the hollowed-out shape has a first inclined surface that slopes inward from top to bottom. The wedge blocks (15) are arranged in pairs in the hollow inside the conical chuck component (8). The surface of the wedge block (15) that contacts the conical chuck component is a second inclined surface corresponding to the first inclined surface. The gap formed between the two wedge blocks (15) is used to clamp the sample. The tapered chuck assembly also includes a clamping bolt (16); The wedge block (15) is provided with a threaded hole, which passes through two wedge blocks (15) and is used to clamp the sample by the clamping bolt (16).

2. The high-speed tensile testing device according to claim 1, characterized in that: The tapered chuck assembly also includes a fastening bridge (11) and a locking bolt (17). The fastening bridge (11) is disposed on the top of the wedge block (15); The tapered chuck component (8) is provided with a threaded hole; The fastening bridge (11) is provided with a through hole, which corresponds to the threaded hole on the tapered chuck component (8); The fastening bridge (11) is fixed to the conical chuck component (8) by locking bolts (17), and the wedge block (15) is limited.

3. The high-speed tensile testing device according to claim 2, characterized in that: The conical chuck assembly further includes an inner clamping block (14), which is embedded in the side of the wedge block (15) that contacts the sample; wherein the side of the inner clamping block (14) that contacts the sample is provided as an anti-slip surface.

4. The high-speed tensile testing device according to claim 3, characterized in that: It also includes energy-absorbing devices, which are installed at the top and bottom of the moving space.

5. The high-speed tensile testing device according to claim 4, characterized in that: The energy-absorbing device includes a first anti-collision block (9), a second anti-collision block (10), a third anti-collision block (12), and a fourth anti-collision block (13). The first anti-collision block (9) is disposed at the bottom of the upper end (4) of the acceleration cage; The second anti-collision block (10) is disposed on the top of the fastening bridge (11); The third anti-collision block (12) is disposed on the top of the conical clamp component (8), and its upper plane is aligned with the upper plane of the fastening bridge (11); The fourth anti-collision block (13) is disposed on top of the third anti-collision block (12), and its upper surface is aligned with the upper surface of the first anti-collision block (9).

6. The high-speed tensile testing apparatus according to claim 5, characterized in that: The acceleration cage assembly also includes connecting threads (1) and fixing screws (2). The connecting thread (1) is provided on the top of the acceleration cage assembly and is used to connect with the dynamic execution part of the testing machine; The fixing ring (2) is configured to cooperate with the connecting thread (1) to lock the acceleration cage assembly to the dynamic execution part of the testing machine.

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