Overall tensile test fixture for composite support belt

Abstract

The utility model relates to the technical field of test fixtures, and discloses a composite support belt integral tensile test fixture, which comprises two fastening plates, the two fastening plates are respectively positioned on the upper side and the lower side, the two fastening plates are connected through a plurality of fastening bolts, gaskets are sleeved outside the fastening bolts, and the gaskets are connected with the fastening plates through bolts. Clamping plates are fixedly connected to the outer portions of the fastening plates, positioning rods are fixedly connected to the four corners of the bottom of the fastening plate on the upper side, and positioning holes are formed in the four corners of the top of the fastening plate on the lower side. According to the utility model, the two fastening plates can be fixed through the matching of the fastening bolts and the gaskets, so that the composite supporting belt structure is clamped and fixed through the clamping plates, the slipping phenomenon between the original chucks of a testing machine is avoided, the tensile test of the composite structural member is quickly and effectively completed, the test efficiency is improved, and the test cost is reduced. And the clamp is prevented from being deformed in the fastening process.

Description

Technical Field

[0001] The utility model relates to the technical field of test fixtures, in particular to an integral tensile test fixture for a composite support belt. Background Art

[0002] Composite support belt products for mine tunnels require structural tensile testing. Only products that pass the overall tensile performance test can be used for tunnel support. However, currently composite tensile test fixtures are mostly used for material performance testing and cannot perform product structure tensile testing. When clamping the composite belt for tensile testing, the maximum tensile force must reach more than 350kN. However, for existing tensile fixtures, when the tension value reaches 100kN, the clamping part will become loose and slip, and the tensile test of the product structure cannot be completed.

[0003] Without changing the original clamping parts of the tensile testing machine, high-performance structural adhesive is used to bond composite plates of the same material to both ends of the composite belt to be tested to strengthen the ends of the composite belt. At the same time, 6 countersunk nuts are used to penetrate and anchor iron plates of a certain thickness at both ends of the composite belt, and then the tensile test is carried out. At this time, the maximum tensile loading load of the composite belt reaches more than 350kN, and the clamping position does not loosen, completing the tensile test of the product. However, using this method requires sample preparation 3 days in advance, and the sample preparation process is complicated, the structural adhesive is expensive, and it does not meet the standards for rapid sampling inspection of mining products. Therefore, it is impossible to conduct sampling inspections of composite support belts in mine tunnels. In response to the above problems, technicians in this field have proposed an integral tensile test fixture for composite support belts to solve the above problems. Utility Model Content

[0004] In order to make up for the above shortcomings, the utility model provides a composite support belt overall tensile test fixture, aiming to improve the shortcomings of the prior art test fixture cannot realize the overall tensile test of the composite support belt, and the testing machine chuck is inconvenient to replace, resulting in low sampling test efficiency.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a composite support belt integral tensile test fixture, comprising two fastening plates, the two fastening plates are respectively located on the upper and lower sides, the two fastening plates are connected by a plurality of fastening bolts, the outer sleeve of the fastening bolts is provided with a gasket, the outer part of the fastening plate is fixedly connected to a clamping plate, the bottom four corners of the upper fastening plate are fixedly connected to positioning rods, and the top four corners of the lower fastening plate are provided with positioning holes.

[0006] Furthermore, the thickness of the clamping plate is 6-8 mm, and protrusion structures are provided on the outer side and the inner side of the clamping plate, and the protrusion depth is 1-1.5 mm, the protrusion spacing is 2-3 mm, and the protrusion length direction is perpendicular to the stretching direction.

[0007] Furthermore, the thickness of the fastening plate is 10-12 mm, a protrusion structure is arranged on the inner side of the fastening plate, and the protrusion depth is 1-1.5 mm, the protrusion spacing is 2-3 mm, and the protrusion length direction is perpendicular to the stretching direction.

[0008] Furthermore, the exterior of the positioning rod is slidably connected to the interior of the positioning hole at the corresponding position.

[0009] Furthermore, recesses suitable for the shape of the composite support belt structure are provided on the inner sides of the front surfaces of the clamping plate and the fastening plate, and are fitted with the composite support belt structure.

[0010] Furthermore, contact positions between the fastening plates and the fastening bolts are provided with through holes, and the fastening bolts fix the two fastening plates through the through holes.

[0011] Furthermore, the gasket has a thickness of 2-4 mm and is fastened with fastening bolts.

[0012] Furthermore, the external thread of the fastening bolt is connected with a nut, and the model of the fastening bolt is M16.

[0013] The utility model has the following beneficial effects:

[0014] In the utility model, the two fastening plates can be fixed by the cooperation of the fastening bolts and the gaskets, so that the composite support belt structure can be clamped and fixed by the clamping plates connected thereto, thereby avoiding the slippage between the original chucks of the testing machine, quickly and effectively completing the tensile test of the composite structure, improving the test efficiency, and preventing the fixture from being deformed during the fastening process.

[0015] In the utility model, by inserting the positioning rod into the positioning hole, the two fastening plates can be pre-connected, and then the clamp can be conveniently connected and fixed by fastening bolts, thereby improving the efficiency of clamping and fixing and avoiding misalignment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A three-dimensional diagram of a composite support belt overall tensile test fixture proposed by the utility model;

[0017] Figure 2 This is a schematic diagram of the clamping plate structure of a composite support belt integral tensile test fixture proposed by the utility model;

[0018] Figure 3 This is a schematic diagram of the positioning hole structure of a composite support belt integral tensile test fixture proposed by the utility model.

[0019] Legend:

[0020] 1. Clamping plate; 2. Fastening plate; 3. Fastening bolt; 4. Notch; 5. Gasket; 6. Positioning rod; 7. Positioning hole; 8. Through hole. DETAILED DESCRIPTION

[0021] 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 only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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.

[0022] Reference Figure 1 - Figure 3 The utility model provides an embodiment: a composite support belt integral tensile test fixture, including two fastening plates 2, the two fastening plates 2 are respectively located at the upper and lower sides, the two fastening plates 2 are connected by a plurality of fastening bolts 3, the outer sleeve of the fastening bolts 3 is provided with a gasket 5, the outer part of the fastening plate 2 is fixedly connected with a clamping plate 1, the bottom four corners of the upper fastening plate 2 are fixedly connected with positioning rods 6, the top four corners of the lower fastening plate 2 are provided with positioning holes 7, and the outer parts of the positioning rods 6 are respectively slidably connected with the inner parts of the positioning holes 7 at the corresponding positions.

[0023] Specifically, the two fastening plates 2 can be fixed by the cooperation between multiple fastening bolts 3 and nuts, so that the fastening plate 2 can drive the clamping plate 1 to move, thereby realizing the clamping and fixing operation of the composite plate structure, enhancing the clamping force, and avoiding slipping between the clamps. The positioning holes 7 and the positioning rods 6 can cooperate to facilitate the pre-fixation between the two fastening plates 2 when the fixing clamp is performed, and the fastening bolts 3 can be more easily passed through the through holes 8 opened on the fastening plates 2 to avoid misalignment, making the fixing more efficient. The gasket 5 can fill the height difference of the fastening bolt 3 after the clamp clamps the composite structure, prevent the fastening plate 2 from deforming during the fastening process, and facilitate more effective fastening of the composite structure.

[0024] Reference Figure 2 The thickness of the clamping plate 1 is 6-8mm, and a protrusion structure is arranged on the outer side and the inner side of the clamping plate 1, and the protrusion depth is 1-1.5mm, the protrusion spacing is 2-3mm, and the protrusion length direction is perpendicular to the stretching direction. The thickness of the fastening plate 2 is 10-12mm, and a protrusion structure is arranged on the inner side of the fastening plate 2, and the protrusion depth is 1-1.5mm, the protrusion spacing is 2-3mm, and the protrusion length direction is perpendicular to the stretching direction.

[0025] Specifically, by setting the thickness of the clamping plate 1 to 6-8 mm, the thickness of the fastening plate 2 to 10-12 mm, and the protrusion depths on the surfaces of both to 1-1.5 mm, and the protrusion spacing to 2-3 mm, the thickness of the clamping area can be controlled to be around 22 mm to match the maximum clamping thickness of the existing testing machine jaws, thereby increasing the applicability of the clamp. In addition, the thickness of the fastening plate 2 is greater than that of the clamping plate 1, which can increase the stiffness of the reinforcement area and prevent deformation of the clamp during mechanical fastening.

[0026] Reference Figure 3 A notch 4 suitable for the shape of the composite support belt structure is provided on the inner side of the front side of the clamping plate 1 and the fastening plate 2, and fits with the composite support belt structure.

[0027] Specifically, the recess 4 can better clamp the support belt structure to avoid sliding after fixation, thereby improving the clamping effect.

[0028] Reference Figure 2 The contact positions of the fastening plates 2 and the fastening bolts 3 are both provided with through holes 8, and the fastening bolts 3 are used to fix the two fastening plates 2 through the through holes 8. The external threads of the fastening bolts 3 are connected with nuts. The model of the fastening bolts 3 is M16, and the thickness of the gasket 5 is 2-4mm, and it is fastened with the fastening bolts 3.

[0029] Specifically, the fastening bolt 3 can pass through the two fastening plates 2 through the through hole 8, and the fastening bolt 3 can be fixed with a nut, thereby achieving the fixation of the composite support belt structure, and a gasket 5 is placed outside the fastening bolt 3 between the two fastening plates 2 to compensate for the height difference of the fastening bolt 3 and prevent the clamp from being deformed, thereby extending its service life.

[0030] Working principle: When testing the composite plate strip, first align the front side of the composite plate strip structure to be tested with the fixture notch 4, then clamp the two ends of the composite plate strip structure between the two fastening plates 2, and insert the positioning rod 6 connected to one of the fastening plates 2 into the positioning hole 7 on the other fastening plate 2 to achieve pre-fixation between the two fastening plates 2, avoid errors when fixing with the fastening bolts 3, and facilitate the subsequent operations. Pass multiple fastening bolts 3 through the through holes 8 opened on the two fastening plates 2 respectively, and then use nuts to fix the fastening bolts 3, so that the composite plate strip can be clamped and fixed by the two clamping plates 1, and finally the clamped composite structure test piece is subjected to a tensile test, and the testing machine chuck realizes the tensile test operation. The use of this fixture can effectively clamp the composite plate structure without changing the original testing machine chuck. At the same time, there is no slippage between the original chuck of the testing machine, and the tensile test of the composite plate and strip structure can be successfully completed. It meets the requirements of rapid sampling inspection of the overall structure of mining products and can complete the rapid sampling test of the composite support belt structure.

[0031] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A composite support belt integral tensile test fixture, comprising two fastening plates (2), characterized in that: The two fastening plates (2) are respectively located at the upper and lower sides, and the two fastening plates (2) are connected by a plurality of fastening bolts (3). The outer sleeve of the fastening bolts (3) is provided with a gasket (5). The outer part of the fastening plate (2) is fixedly connected to a clamping plate (1). The bottom four corners of the upper fastening plate (2) are fixedly connected to positioning rods (6), and the top four corners of the lower fastening plate (2) are provided with positioning holes (7).

2. A composite support belt integral tensile test fixture according to claim 1, characterized in that: The thickness of the clamping plate (1) is 6-8 mm, and protrusion structures are arranged on the outer side and the inner side of the clamping plate (1), and the protrusion depth is 1-1.5 mm, the protrusion spacing is 2-3 mm, and the protrusion length direction is perpendicular to the stretching direction.

3. A composite support belt integral tensile test fixture according to claim 1, characterized in that: The thickness of the fastening plate (2) is 10-12 mm, a protrusion structure is arranged on the inner side of the fastening plate (2), and the protrusion depth is 1-1.5 mm, the protrusion spacing is 2-3 mm, and the protrusion length direction is perpendicular to the stretching direction.

4. The composite support belt integral tensile test fixture according to claim 1, characterized in that: The exterior of the positioning rod (6) is slidably connected to the interior of the positioning hole (7) at the corresponding position.

5. The composite support belt integral tensile test fixture according to claim 1, characterized in that: The inner sides of the front faces of the clamping plate (1) and the fastening plate (2) are provided with recesses (4) that are suitable for the shape of the composite material support belt structure and fit the composite material support belt structure.

6. The composite support belt integral tensile test fixture according to claim 1, characterized in that: A through hole (8) is provided at the contact position between the fastening plate (2) and the fastening bolt (3), and the fastening bolt (3) fixes the two fastening plates (2) through the through hole (8).

7. The composite support belt integral tensile test fixture according to claim 1, characterized in that: The gasket (5) has a thickness of 2-4 mm and is fastened with the fastening bolts (3).

8. The composite support belt integral tensile test fixture according to claim 1, characterized in that: The external thread of the fastening bolt (3) is connected to a nut, and the model of the fastening bolt (3) is M16.

Images