CN215931512U

CN215931512U - Tool for plane tensile test of sandwich structure

Info

Publication number: CN215931512U
Application number: CN202122037299.6U
Authority: CN
Inventors: 刘钟铃; 卢燕; 李雪卉; 徐涵文; 杨德森; 王凡文
Original assignee: Sino Cf Composite Sci & Tech Weihai Co ltd
Current assignee: Sino Cf Composite Sci & Tech Weihai Co ltd
Priority date: 2021-08-27
Filing date: 2021-08-27
Publication date: 2022-03-01
Anticipated expiration: 2031-08-27

Abstract

The application provides a frock for sandwich structure plane tensile test, it has solved current plane tensile test and has not adopted frock direct test to lead to loading plate skew not high technical problem to neutrality from top to bottom. It is equipped with connecting portion and location portion, and connecting portion include load plate and coupling assembling, and the load plate includes flat board and connecting plate, and the connecting plate is connected with coupling assembling, and coupling assembling is connected with the testing machine, and location portion includes the locating plate, is equipped with the draw-in groove on the locating plate, and the draw-in groove both sides are equipped with first connecting hole, and first connecting hole cooperation is connected with first connecting piece, is equipped with spacing hole in the draw-in groove, and the connecting plate can just pass spacing hole, and dull and stereotyped width is the same with the width of draw-in groove. The utility model can be widely applied to the technical field of plane tensile test.

Description

Tool for plane tensile test of sandwich structure

Technical Field

The application belongs to the technical field of plane tensile test, and more specifically relates to a tool for plane tensile test of a sandwich structure.

Background

The sandwich structure composite material has the characteristics of typical high specific strength and high specific rigidity, and the structural design scheme organically combines the high strength and high modulus of the panel with the low density and high rigidity of the sandwich core, and has extremely important application value in the fields of aviation, aerospace, ships, rail transit, electronics and the like. The plane tension test is the most commonly used test method for representing the mechanical property of the sandwich structure, and plays an important role in material development in the sandwich structure and evaluation of the quality of sandwich products.

The difficulty of the planar tensile test of the sandwich structure mainly lies in the requirement of ensuring the alignment between the loading plates and between the clamp loading plate and the loading clamp. The test system can be additionally bent due to the fact that the clamp is not centered and the bonded loading plate and the loading clamp are not well centered, and the additional bending can cause the test sample to be damaged in advance, so that the test result of the material is directly influenced, and the performance of the material cannot be truly reflected.

At present, some scientific research institutes and companies in China mainly adopt the following methods for testing: directly glue the loading block on the upper surface and the lower surface of the sample without adopting a tool, and after the solidification is finished, the loading block is connected with a clamp of the testing machine through a hole on the loading block. Because of the no frock location in the process of gluing, lead to the upper and lower loading block to take place the skew, cause on the one hand to be difficult to the tester anchor clamps of packing into, on the other hand causes the centering not high, leads to the experiment to destroy in advance, and data is discrete to increase. Therefore, a set of tool is urgently needed to be designed, so that accurate positioning and gluing of the plane tensile sample and the loading plate can be completed, and high centering performance of the upper loading plate and the lower loading plate is guaranteed; and the sample can be conveniently clamped, and the high alignment of the loading plate and the loading clamp is ensured.

Disclosure of Invention

The utility model provides a tool for planar tensile testing of an interlayer mechanism, which ensures the alignment of an upper loading plate and a lower loading plate and aims at the technical problem that the offset alignment of the upper loading plate and the lower loading plate is not high due to the fact that the existing planar tensile testing does not adopt the tool for direct testing.

In order to achieve the purpose, the technical scheme adopted by the application is as follows: the utility model provides a frock for sandwich structure plane tensile test, it is equipped with connecting portion and location portion, connecting portion include load plate and coupling assembling, load plate includes flat board and connecting plate, the connecting plate is connected with coupling assembling, coupling assembling is connected with the testing machine, location portion includes the locating plate, be equipped with the draw-in groove on the locating plate, the draw-in groove both sides are equipped with first connecting hole, first connecting hole cooperation is connected with first connecting piece, be equipped with spacing hole in the draw-in groove, the connecting plate can just pass spacing hole, dull and stereotyped width is the same with the width of draw-in groove.

Preferably, the connecting plate is provided with a second connecting hole, and the second connecting hole is rotatably connected with a connecting assembly through a second connecting piece.

Preferably, coupling assembling includes universal joint and rib, is equipped with the third connecting hole on the universal joint, and the third connecting hole rotates through the second connecting piece and is connected with the rib.

Preferably, the first connecting hole is a screw hole, and the first connecting member is a bolt.

Preferably, the second connector is a latch.

Preferably, the number of the limiting holes is multiple, and each limiting hole can be matched with the connecting plate.

Compared with the prior art, the utility model has the beneficial effects that:

1. according to the utility model, the loading plates are connected to the upper surface and the lower surface of the tensile sample, and the upper loading plate and the lower loading plate are respectively connected with the positioning assembly when the tensile sample and the loading plates are bonded and cured, so that the loading plates and the tensile sample are prevented from shifting in the bonding and curing process, and the alignment of the upper loading plate and the lower loading plate is ensured.

2. Through setting up coupling assembling, make things convenient for the load plate to splice with the sample and the clamping of coupling assembling and testing machine, can guarantee that coupling assembling has higher centering nature in the testing process, reduced test data's dispersion to test data's accuracy has been guaranteed.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic view of the connection between the connection portion and the positioning portion of the present invention;

FIG. 2 is a schematic front view of a positioning assembly according to the present invention;

FIG. 3 is a schematic side view of the positioning assembly of the present invention;

FIG. 4 is a schematic view of a coupling assembly of the present invention;

FIG. 5 is a schematic structural view of a load plate according to the present invention;

FIG. 6 is a schematic structural view of the universal joint of the present invention;

fig. 7 is a schematic structural view of the rib of the present invention.

The symbols in the drawings illustrate that:

1. a loading plate; 2. a flat plate; 3. a connecting plate; 4. positioning a plate; 5. a card slot; 6. a screw hole; 7. a bolt; 8. a limiting hole; 9. a second connection hole; 10. a bolt; 11. a universal joint; 12. ribs; 13. third attachment hole 14. stretch the specimen.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

It should be noted that the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

As shown in fig. 1-4, the utility model provides a tool for a planar tensile test of a sandwich structure, which is provided with a connecting part and a positioning part, wherein the connecting part comprises a loading plate 1 and a connecting assembly, the loading plate 1 comprises a flat plate 2 and a connecting plate 3, the connecting plate 3 is connected with the connecting assembly, the positioning part comprises a positioning plate 4, a clamping groove 5 is arranged on the positioning plate 4, first connecting holes are arranged on two sides of the clamping groove 5, the first connecting holes are connected with first connecting pieces in a matching manner, a limiting hole 8 is arranged in the clamping groove 5, the connecting plate 3 can just penetrate through the limiting hole 8, and the width of the flat plate 2 is the same as that of the clamping groove 5.

The flat plate 2 of the loading plate 1 is used for being connected with the surface of the tensile sample 14, the connecting assembly is used for connecting the loading plate 1 and the testing machine, and the testing machine is used for applying tensile force to the connecting assembly, so that the tensile force is applied to the tensile sample 14 through the loading plate 1; the positioning assembly is used for positioning when the loading plate 1 is bonded with the tensile sample 14, the loading plate 1 is specifically pre-bonded on the upper surface and the lower surface of the tensile sample 14 respectively, then the connecting plates 3 connected with the loading plate 1 on the upper surface and the lower surface of the tensile sample 14 are inserted into the limiting holes 8 of the upper positioning plate 4 and the lower positioning plate 4 respectively, so that the side surface of the flat plate 2 and the side surface of the tensile sample 14 are just clamped in the clamping groove 5, then the flat plate 2 is matched with the first connecting hole through the first connecting piece, the upper positioning plate 4 and the lower positioning plate 4 are connected, the operation can enable the edge of the flat plate 2 to be aligned with the edge of the tensile sample 14 and then cured, the positioning assembly ensures that the loading plate 1 and the tensile sample 14 cannot deviate in the curing process, and therefore the alignment of the upper loading plate 1 and the lower loading plate 1 is ensured.

As shown in fig. 4 and 5, a second connecting hole 9 is formed in the connecting plate 3, and the second connecting hole 9 is rotatably connected to the connecting assembly through a second connecting member. Connecting plate 3 and coupling assembling are connected in the rotation of second connecting piece, and the pulling force that can guarantee that connecting plate 3 received is unanimous with the tensile machine to coupling assembling's pulling force size direction to the pulling force that 14 surfaces of tensile sample received of the pulling force that the assurance testing machine was applyed is the same, has guaranteed test data's accuracy.

As shown in fig. 4-7, the connecting assembly includes a universal joint 11 and a rib 12, a third connecting hole 13 is formed in the universal joint 11, and the rib 12 is rotatably connected to the third connecting hole 13 through a second connecting member. The universal joint 11 can adjust the direction in real time, so that the direction of the tensile force applied by the testing machine is the same as that of the tensile force applied to the tensile sample 14, and the accuracy of the test data is ensured; thereby the testing machine exerts the pulling force to coupling assembling through exerting the pulling force to rib 12, and rib 12 has better tensile resistance, and is not fragile in the testing process, makes test fixture more durable, has improved test fixture's life.

As shown in fig. 1-3, the first connecting hole is a screw hole 6, and the first connecting member is a bolt 7. The upper positioning plate 4 and the lower positioning plate 4 are connected through the matching of the screw holes 6 and the bolts 7, so that the flat plate 2 of the loading plate 1 is always aligned with the edge of the tensile sample 14 in the curing process, the centering performance of the upper loading plate 1 and the lower loading plate 1 is ensured, meanwhile, the connection of the screw holes 6 and the bolts 7 is simple and reliable, and the positioning plates 4 and the loading plates 1 are conveniently separated through disassembly after curing is finished.

As shown in fig. 4, the second connector is a latch 10. The second connecting piece is the part that can play the rotation connection function, and in this embodiment, bolt 10 is chooseed for use to the second connecting piece, and connecting rib 12, universal joint 11 and connecting plate 3 that bolt 10 can be better to can be in the same direction as smooth realization rotation connection, thereby guarantee that the pulling force that tensile sample 14 received is perpendicular to the upper and lower surface of tensile sample 14 all the time, thereby improve the accuracy of test data.

As shown in fig. 1 and 2, the number of the limiting holes 8 is plural, and each limiting hole 8 can be matched with the connecting plate 3. By arranging the plurality of limiting holes 8, the plurality of loading plates 1 can be connected to one positioning plate 4, so that the curing work of the plurality of loading plates 1 and the tensile sample 14 can be completed between the upper positioning plate and the lower positioning plate 4, and the curing efficiency of the loading plates 1 and the tensile sample 14 is improved.

When the device is used, the upper surface and the lower surface of a tensile sample 14 are respectively connected with a flat plate 2 of a loading plate 1, the size of the flat plate 2 is designed according to the size of the tensile sample 14, and the specific steps comprise firstly, grinding the upper surface and the lower surface of the tensile sample 14 by using sand paper, then respectively connecting the upper surface and the lower surface of the tensile sample 14 with the flat plate 2 by using a glue film or an adhesive, ensuring that the edge of the tensile sample 14 is aligned with the edge of the flat plate 2, and completing pre-bonding; then the upper and lower loading plates 1 are respectively connected with the positioning assembly, the concrete steps are that a hole sealing agent and a release agent are coated on the positioning assembly to prevent the problem that the positioning assembly cannot be separated from the loading plate 1 due to the fact that colloid overflows and adheres to the positioning assembly in the curing process, then the connecting plates 3 on the upper and lower loading plates 1 are respectively inserted into the limiting holes 8 of the upper and lower positioning plates 4, the edges of the flat plate 2 and the tensile sample 14 are clamped in the clamping groove 5, then the screw holes 6 of the upper and lower positioning plates 4 are connected through bolts 7, and then curing is started, the steps ensure that the edges of the flat plate 2 of the loading plate 1 and the tensile sample 14 are always aligned in the curing process, and the alignment of the upper and lower loading plates 1 is ensured;

and after the curing is finished, the bolts 7 and the positioning plate 4 are detached, the upper loading plate 1 and the lower loading plate 1 are respectively connected with the two groups of connecting assemblies, then the connecting assemblies are connected with two chucks of the testing machine, the plane tensile test is carried out, and the experimental data are recorded.

In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Further, in the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

The above-mentioned embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.

Claims

1. The utility model provides a frock for sandwich structure plane tensile test, its characterized in that, it is equipped with connecting portion and location portion, connecting portion include load plate and coupling assembling, load plate includes flat board and connecting plate, the connecting plate with coupling assembling connects, coupling assembling is connected with the testing machine, location portion includes the locating plate, be equipped with the draw-in groove on the locating plate, the draw-in groove both sides are equipped with first connecting hole, first connecting hole cooperation is connected with first connecting piece, be equipped with spacing hole in the draw-in groove, the connecting plate can just pass spacing hole, dull and stereotyped width with the width of draw-in groove is the same.

2. The tool for testing planar tensile of the sandwich structure according to claim 1, wherein a second connecting hole is formed in the connecting plate, and the second connecting hole is rotatably connected with the connecting assembly through a second connecting piece.

3. The tool for testing planar tensile of the sandwich structure according to claim 2, wherein the connecting assembly comprises a universal joint and a rib, a third connecting hole is formed in the universal joint, and the rib is rotatably connected to the third connecting hole through the second connecting piece.

4. The tooling for sandwich structure plane tensile testing according to claim 3, wherein the first connecting holes are screw holes and the first connecting members are bolts.

5. The tooling for sandwich structure plane tensile testing according to claim 4, wherein the second connecting piece is a bolt.

6. The tooling for planar tensile testing of sandwich structures according to claim 1, wherein the number of the limiting holes is multiple, and each limiting hole can be matched with the connecting plate.