Three-point bending test device for test sample
By designing the bearing assembly, locking assembly and bending mechanism of the three-point bending test device, the problem of cumbersome positioning of the test sample in the prior art is solved, and the simplification of test operations and improvement of efficiency is achieved.
Patent Information
- Application Number
- CN202420990083.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-09
- Publication Date
- 2025-03-04
- Estimated Expiration
- 2034-05-09
AI Technical Summary
In the existing three-point bending test, multiple test samples need to be measured separately to determine their relative position with the support, resulting in cumbersome test operations and low efficiency.
A three-point bending test device for test specimens is designed, including a load bearing assembly, a locking assembly and a bending mechanism. By providing a stop and a locking member on the load-bearing assembly, one long side of the test sample abuts the stop and the one short side of the test sample abuts the positioning and standardized testing of the test sample is achieved.
The test operation is simplified and the test efficiency is improved, and the test efficiency is improved by about 20%.
Smart Images
Figure CN222561472U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a bending device, in particular to a three-point bending test device for a test sample. Background Art
[0002] Bending test is an important test method for measuring the bending stiffness, strength, and load-deflection properties of composite laminates. Domestic and international standards such as ASTM D7264, ASTM D790, HB 7617-1998, and ASTM C1341 all provide specific test methods for measuring the bending stiffness, strength, and load-deflection properties of composite materials using bending tests.
[0003] In the current three-point bending test, the test specimen is placed on two supports, and the relative position of the test specimen and the supports is determined by a measuring ruler. Then the bending pressure head is controlled to descend, and the bending deformation of the test specimen occurs under the joint action of the bending pressure head and the two supports to test the bending performance of the test specimen. However, since each test specimen needs to be measured separately before the bending test, the test operation is cumbersome and the test efficiency is low. Summary of the invention
[0004] The embodiment of the utility model provides a three-point bending test device for a test specimen, which solves the problem that in the current three-point bending test, a plurality of test specimens need to be measured separately to determine the relative positions of the test specimens and a support.
[0005] In order to solve the above technical problems, the utility model is achieved as follows:
[0006] A three-point bending test device for a test specimen is provided, which includes a bearing assembly, a locking assembly and a bending mechanism. The bearing assembly has a base, a first bearing member, a second bearing member and a stopper. The first bearing member and the second bearing member are arranged on the base relative to each other. The first bearing member and the second bearing member bear the test specimen. The stopper is arranged on the first bearing member and the second bearing member. One long side of the test specimen abuts against the stopper. The locking assembly has a locking member and an adjusting member. The locking member is located on a side of the first bearing member away from the second bearing member. The adjusting member is connected to the locking member. The adjusting member adjusts the distance between the locking member and the first bearing member, and one short side of the test specimen abuts against the locking member. The bending mechanism is arranged above the bearing assembly. The bending mechanism has a lifting assembly and a bending pressure head. The lifting assembly is connected to the bending pressure head. The bending pressure head is located between the first bearing member and the second bearing member.
[0007] In one embodiment, the base has a slide groove, and the first carrier and the second carrier are disposed in the slide groove, so that the first carrier and the second carrier are driven to slide along the slide groove to adjust the relative distance between the first carrier and the second carrier.
[0008] In one embodiment, the bearing assembly further comprises a locking member, and the first bearing member and the second bearing member are locked and fixed in the sliding groove through the locking member.
[0009] In one embodiment, the first carrier has a first carrier surface, the second carrier has a second carrier surface, the first carrier surface is parallel to the second carrier surface, and the lower surface of the test piece is attached to the first carrier surface and the second carrier surface.
[0010] In one embodiment, the first bearing surface and the second bearing surface are arc-shaped surfaces.
[0011] In one embodiment, the stopper has two right-angle stops, wherein the horizontal stopper of one right-angle stopper is fixed to a side of the first carrier away from the second carrier, and the vertical stopper extends upward to above the first carrier surface, and the horizontal stopper of the other right-angle stopper is fixed to a side of the second carrier away from the first carrier, and the vertical stopper extends upward to above the second carrier surface, and the vertical stops of the two right-angle stops are in contact with one long side of the test specimen.
[0012] In one embodiment, the adjusting member has a connecting plate, a rectangular through hole and a screw, one end of the connecting plate is connected to the locking member, the rectangular through hole is located in the connecting plate, one end of the screw passes through the rectangular through hole and is connected to the first supporting member to fix the connecting plate to the first supporting member, and the adjusting member adjusts the distance between the locking member and the first supporting member by adjusting the position of the screw located in the rectangular through hole.
[0013] In one embodiment, the distance between the locking member and the first bearing member is adjustable in a range of 0-30 mm.
[0014] In one embodiment, the lifting component has a connecting member and a lifting member, one end of the connecting member is connected to the lifting member, and the other end of the connecting member is connected to the bending pressure head, and the lifting member drives the bending pressure head to rise and fall through the connecting member.
[0015] In one embodiment, the connecting member has a first connecting plate, a second connecting plate and a connecting guide rod, the first connecting plate is located below the base, the second connecting plate is located above the base, one end of the connecting guide rod is connected to the first connecting plate, the other end of the connecting guide rod passes through the base and is connected to the second connecting plate, the lifting member is connected to the first connecting plate, and the bending pressure head is arranged on the side of the second connecting plate opposite to the base.
[0016] In an embodiment of the utility model, a test specimen is placed on a first carrier and a second carrier, and one long side of the test specimen is abutted against a stopper. Then, the distance between the locking member and the first carrier is adjusted according to the required test length of the test specimen, and one short side of the test specimen is abutted against the locking member, so as to achieve the positioning of the test specimen. Then, the lifting assembly controls the bending pressure head to descend, and the bending deformation of the test specimen occurs under the joint action of the bending pressure head and the first carrier and the second carrier, and the bending performance of the test specimen is tested. When testing the remaining test specimens, it is only necessary to abut one long side of the test specimen against the stopper and one short side against the locking member, so as to meet the required test length requirement of the test specimen, thereby simplifying the test operation and improving the test efficiency, and the test efficiency is improved by about 20%. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:
[0018] Figure 1 It is a three-dimensional diagram of the use of the three-point bending test device of the test sample of the utility model;
[0019] Figure 2 yes Figure 1 Partial stereogram. DETAILED DESCRIPTION
[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0021] In the description of the present invention, it should be understood that the terms "upper", "lower", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.
[0022] In addition, although the terms “first”, “second”, etc. are used herein to describe different elements, such terms are merely used to distinguish elements or operations described with the same technical terms.
[0023] See also Figure 1 and Figure 2 , which is a three-point bending test device for a test piece of the utility model and a partial three-point bending test device; as shown in the figure, the three-point bending test device 100 for the test piece includes a bearing assembly 1, a locking assembly 2 and a bending mechanism 3. The bearing assembly 1 has a base 11, a first bearing member 12, a second bearing member 13 and a stopper 14. The first bearing member 12 and the second bearing member 13 are arranged on the base 11 opposite to each other. The first bearing member 12 and the second bearing member 13 bear the test piece S. In this embodiment, the first bearing member 12 has a first bearing surface 121, and the second bearing member 13 has a second bearing surface 131. The first bearing surface 121 and the second bearing surface 131 are parallel, and the lower surface of the test piece S is attached to the first bearing surface 121 and the second bearing surface 131. The first bearing surface 121 and the second bearing surface 131 are two bending fulcrums of the test piece S. The first bearing surface 121 and the second bearing surface 131 are arc-shaped surfaces. The stopper 14 is disposed on the first carrier 12 and the second carrier 13 . One long side of the test sample S abuts against the stopper 14 .
[0024] As mentioned above, the locking assembly 2 comprises a locking member 21 and an adjusting member 22. The locking member 21 is located on a side of the first bearing member 12 away from the second bearing member 13. Figure 1 and Figure 2 As shown, the locking member 21 is located on the left side of the first carrier 12. The adjusting member 22 is connected to the locking member 21. The adjusting member 22 adjusts the distance between the locking member 21 and the first carrier 12. One short side of the test specimen S abuts against the locking member 21. The bending mechanism 3 is arranged above the carrier assembly 1. The bending mechanism 3 has a lifting assembly 31 and a bending press 32. The lifting assembly 31 is connected to the bending press 32. The bending press 32 is located between the first carrier 12 and the second carrier 13. The lifting assembly 31 gradually bends the test specimen S by driving the bending press 32 to descend.
[0025] When the three-point bending test device 100 of the test specimen of the present embodiment is used to test the bending performance of multiple test specimens S, the test specimen S is first placed on the first carrier 12 and the second carrier 13, and one side of the long side of the test specimen S is abutted against the stopper 14, and then the distance between the locking member 21 and the first carrier 12 is adjusted according to the required test length of the test specimen S, and one side of the short side of the test specimen S is abutted against the locking member 21, so as to achieve the positioning of the test specimen S. Then the lifting assembly 31 controls the bending pressure head 32 to descend, and the test specimen S is bent and deformed under the joint action of the bending pressure head 32 and the first carrier 12 and the second carrier 13, and the bending performance of the test specimen S is tested. When testing the remaining test specimens S, it is only necessary to abut one side of the long side of the test specimen S against the stopper 14 and one side of the short side against the locking member 21, so that the required test length requirement of the test specimen S can be met, thereby simplifying the test operation and improving the test efficiency, and the test efficiency is improved by about 20%.
[0026] The following is a further detailed description of the structures of the bearing assembly 1, the locking assembly 2 and the bending mechanism 3: Figure 1 and Figure 2 As shown, the base 11 has a slide groove 111. The first carrier 12 and the second carrier 13 are disposed in the slide groove 111. The first carrier 12 and the second carrier 13 are driven to slide along the slide groove 111 to adjust the relative distance between the first carrier 12 and the second carrier 13. In this embodiment, the carrier assembly 1 further has a locking member 15, and the first carrier 12 and the second carrier 13 are locked and fixed in the slide groove 111 by the locking member 15. The locking member 15 uses a bolt.
[0027] The stopper 14 has two right-angled stops. The horizontal stopper 141 of one right-angled stopper is fixed to the side of the first carrier 12 away from the second carrier 13, and the vertical stopper 142 extends upward to the top of the first carrier surface 121. The horizontal stopper 141 of the other right-angled stopper is fixed to the side of the second carrier 13 away from the first carrier 12, and the vertical stopper 142 extends upward to the top of the second carrier surface 131. The vertical stopper 142 of the two right-angled stops fits with one long side of the test sample S.
[0028] The adjusting member 22 has a connecting plate 221, a rectangular through hole 222 and a screw 223. One end of the connecting plate 221 is connected to the locking member 21. The connecting plate 221 and the locking member 21 are orthogonally connected. The rectangular through hole 222 is located on the connecting plate 221. One end of the screw 223 passes through the rectangular through hole 222 and is connected to the first bearing member 12 to lock and fix the connecting plate 221 to the first bearing member 12. The adjusting member 22 adjusts the distance between the locking member 21 and the first bearing member 12 by adjusting the position of the screw 223 located in the rectangular through hole 222. The adjustable range of the distance between the locking member 21 and the first bearing member 12 is 0-30 mm.
[0029] The lifting assembly 31 includes a connecting member 311 and a lifting member 312. One end of the connecting member 311 is connected to the lifting member 312. The other end of the connecting member 311 is connected to the bending pressure head 32. The lifting member 312 drives the bending pressure head 32 to rise and fall through the connecting member 311. The lifting member 312 uses a cylinder. The connecting member 311 includes a first connecting plate 3111, a second connecting plate 3112 and a connecting guide rod 3113. The first connecting plate 3111 is located below the base 11, and the second connecting plate 3112 is located above the base 11. The connecting guide rod 3113 is vertically arranged. One end of the connecting guide rod 3113 is connected to the first connecting plate 3111. The other end of the connecting guide rod 3113 passes through the base 11 and is connected to the second connecting plate 3112. The lifting member 312 is connected to the first connecting plate 3111. The bending pressure head 32 is arranged on the side of the second connecting plate 3112 opposite to the base 11.
[0030] In summary, the utility model provides a three-point bending test device for a test specimen, wherein the test specimen is placed on a first carrier and a second carrier, and one long side of the test specimen is abutted against a stopper. Then, the distance between the locking member and the first carrier is adjusted according to the required test length of the test specimen, and one short side of the test specimen is abutted against the locking member, thereby achieving the positioning of the test specimen. Then, the lifting component controls the bending pressure head to descend, and the bending deformation of the test specimen occurs under the joint action of the bending pressure head and the first carrier and the second carrier, and the bending performance of the test specimen is tested. When testing the remaining test specimens, it is only necessary to abut one long side of the test specimen against the stopper and one short side against the locking member, so that the required test length requirement of the test specimen can be met, thereby simplifying the test operation and improving the test efficiency, which is improved by about 20%.
[0031] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.
[0032] The embodiments of the utility model are described above in conjunction with the accompanying drawings, but the utility model is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the enlightenment of the utility model, ordinary technicians in this field can also make many forms without departing from the scope of protection of the utility model and the claims, all of which are within the protection of the utility model.
Claims
1. A three-point bending test device for a test specimen, characterized in that: include: A bearing assembly, comprising a base, a first bearing member, a second bearing member and a stopper, wherein the first bearing member and the second bearing member are arranged on the base opposite to each other, the first bearing member and the second bearing member carry the test sample, the stopper is arranged on the first bearing member and the second bearing member, and one long side of the test sample abuts against the stopper; A locking assembly, comprising a locking member and an adjusting member, wherein the locking member is located on a side of the first bearing member away from the second bearing member, the adjusting member is connected to the locking member, and the adjusting member adjusts the distance between the locking member and the first bearing member, and a short side of one side of the test specimen abuts against the locking member; The bending mechanism is arranged above the bearing component, and the bending mechanism has a lifting component and a bending pressure head. The lifting component is connected to the bending pressure head, and the bending pressure head is located between the first bearing component and the second bearing component.
2. The three-point bending test device for a test piece according to claim 1, characterized in that: The base has a slide groove, and the first bearing member and the second bearing member are disposed in the slide groove, so that the first bearing member and the second bearing member are driven to slide along the slide groove to adjust the relative distance between the first bearing member and the second bearing member.
3. The three-point bending test device for a test piece according to claim 2, characterized in that: The bearing assembly further has a locking member, and the first bearing member and the second bearing member are locked and fixed in the sliding groove through the locking member.
4. The three-point bending test device for a test piece according to claim 1, characterized in that: The first carrier has a first carrier surface, the second carrier has a second carrier surface, the first carrier surface is parallel to the second carrier surface, and the lower surface of the test piece is attached to the first carrier surface and the second carrier surface.
5. The three-point bending test device for a test piece according to claim 4, characterized in that: The first bearing surface and the second bearing surface are arc-shaped surfaces.
6. The three-point bending test device for a test piece according to claim 4, characterized in that: The stopper has two right-angle stops, wherein a horizontal stopper of one of the right-angle stops is fixed to a side of the first bearing member away from the second bearing member, and a vertical stopper extends upward to above the first bearing surface, and a horizontal stopper of the other right-angle stopper is fixed to a side of the second bearing member away from the first bearing member, and a vertical stopper extends upward to above the second bearing surface, and the vertical stops of the two right-angle stops are in contact with one long side of the test specimen.
7. The three-point bending test device for a test piece according to claim 1, characterized in that: The adjusting member comprises a connecting plate, a rectangular through hole and a screw, one end of the connecting plate is connected to the locking member, the rectangular through hole is located in the connecting plate, one end of the screw passes through the rectangular through hole and is connected to the first supporting member to fix the connecting plate to the first supporting member, and the adjusting member adjusts the distance between the locking member and the first supporting member by adjusting the position of the screw located in the rectangular through hole.
8. The three-point bending test device for a test piece according to claim 1, characterized in that: The adjustable range of the distance between the locking member and the first bearing member is 0-30 mm.
9. The three-point bending test device for a test piece according to claim 1, characterized in that: The lifting component comprises a connecting member and a lifting member, one end of the connecting member is connected to the lifting member, and the other end of the connecting member is connected to the bending pressure head, and the lifting member drives the bending pressure head to rise and fall through the connecting member.
10. The three-point bending test device for a test piece according to claim 9, characterized in that: The connecting member comprises a first connecting plate, a second connecting plate and a connecting guide rod, the first connecting plate is located below the base, the second connecting plate is located above the base, one end of the connecting guide rod is connected to the first connecting plate, the other end of the connecting guide rod passes through the base and is connected to the second connecting plate, the lifting member is connected to the first connecting plate, and the bending pressure head is arranged on the side of the second connecting plate opposite to the base.