Bolt tensile strength testing device

Abstract

The utility model belongs to a bolt tensile strength testing device in the technical field of bolt performance testing. Comprising an upper force-bearing clamp (1) and a lower force-bearing clamp (2), an upper force-bearing groove (3) is formed in the lower portion of the upper force-bearing clamp (1), an upper opening (4) is formed in the lower end of the upper force-bearing groove (3), a lower force-bearing groove (5) is formed in the upper portion of the lower force-bearing clamp (2), a lower opening (6) is formed in the upper end of the lower force-bearing groove (5), a bolt backing ring (7) is clamped in the upper force-bearing groove (3), and a bolt tension ring (8) is clamped in the lower force-bearing groove (5). The bolt tensile strength testing device provided by the utility model is simple in structure, can conveniently and reliably realize the tensile strength test of the bolt, ensures that the clamp can bear tensile forces of different sizes, can be suitable for the tensile test of bolts of different models and sizes by replacing local parts, and improves the universality of equipment.

Description

TECHNICAL FIELD

[0001] The utility model belongs to bolt performance test technical field, more specifically, relate to a bolt tensile strength testing device. BACKGROUND

[0002] Bolt as a kind of connecting fixed standard piece, it is widely used in mechanical industry, because it has certain requirement to its own tensile strength, the bolt used is subjected to tension test, to complete tensile strength test.When testing using tension testing machine, bolt needs to be clamped, and different models, size, length of bolt are tested.The defects of prior art: when bolt model is different, it is time-consuming and laborious to replace clamp, and the efficiency is not high;when bolt diameter is larger, test tension is larger, clamping device is prone to clamping instability and clamp offset phenomenon;when bolt length is shorter, bolt clamping is difficult, even cannot be clamped, and the equipment versatility is poor.

[0003] In prior art, there is a clamp for measuring bolt tensile strength with publication (announcement) number CN103743623A, which discloses a clamp for measuring bolt tensile strength, comprising upper clamp and lower clamp, three stepped holes with different hole diameters are arranged on the bottom of upper clamp, the opening side of each stepped hole is provided with through groove for bolt head to pass through, the position corresponding to each stepped hole of lower clamp is provided with threaded hole with corresponding hole diameter, and three connecting heads are arranged on the top of upper clamp and the bottom of lower clamp.After adopting the above structure, each time when replacing bolt for testing, only need to place bolt for testing in stepped hole through through groove in upper clamp, after testing, bolt for testing can be taken out from stepped hole through through groove, without disassembling and assembling upper clamp back and forth, which reduces labor intensity and is convenient to use, in addition, three stepped holes with different hole diameters and threaded holes make a set of clamp can adapt to three different diameters of bolt for testing, which reduces cost investment of user and is convenient to store.

[0004] However, the technology does not involve the technical problems and technical solutions of the present application. UTILITY MODEL CONTENT

[0005] The utility model solves the technical problems that: in view of the defects of prior art, provide a kind of bolt tensile strength testing device with simple structure, can conveniently and reliably realize bolt tensile strength test, ensure that clamp can withstand different size of tension, and replacement of partial component can be suitable for the tensile test of bolt of different model and size, improve the versatility of equipment.

[0006] To solve the above technical problems, the technical scheme adopted by the utility model is:

[0007] The utility model discloses a bolt tensile strength testing device, including upper force clamp, lower force clamp, the upper force clamp lower part sets up the upper force groove, and the upper force groove lower extreme sets up the upper opening, and the lower force clamp upper part sets up the lower force groove, and the lower force groove upper end sets up the lower opening, and the upper force groove is clamped and is installed bolt grommet, and the lower force groove is clamped and is installed bolt tension ring.

[0008] The upper force groove and the upper opening of the upper force clamp are in T-shaped structure, and the lower force groove and the lower opening of the lower force clamp are in inverted T-shaped structure.

[0009] The bolt tension ring includes a tension ring end and a tension ring body, and the tension ring end and the tension ring body are in T-shaped structure; the tension ring body is in hollow structure, and a threaded portion is arranged on the inner ring of the tension ring body.

[0010] The upper force clamp is connected with a tension cylinder.

[0011] The lower force clamp is connected with a clamping seat.

[0012] The tension ring end of the bolt tension ring is located in the lower force groove, and the tension ring body of the bolt tension ring passes through the lower opening.

[0013] The bolt grommet is located in the upper force groove, the bolt passes through the bolt grommet, and the bolt simultaneously passes through the upper opening and is screwed to connect the tension ring body.

[0014] The bolt grommet 7 is provided with a grommet through hole in the center.

[0015] The upper force clamp and the lower force clamp are both made of metal material.

[0016] The technical scheme of the utility model has the following working principles and beneficial effects:

[0017] The utility model discloses bolt tensile strength testing device, structural setting, make respectively upper force clamp, lower force clamp, upper force clamp, lower force clamp need high strength, and the upper force groove is set to the upper force clamp lower part, and the upper opening is set to the upper force groove lower extreme, and the bolt grommet is used for placing in the upper force groove, and the bolt passes through the bolt grommet, and the end of bolt is clamped on the upper part of bolt grommet, and the screw rod of bolt passes through the bolt grommet and passes through the upper opening, and then extends to the position below the upper force clamp, and the screw rod of bolt and bolt tension ring are connected conveniently by screwing. BRIEF DESCRIPTION OF DRAWINGS

[0018] Brief description of the contents expressed by each drawing of the specification and the marks in the drawing are as follows:

[0019] Figure 1 It is the structural diagram of bolt tensile strength testing device for the utility model.

[0020] The marks in the drawing are as follows: 1, upper force clamp; 2, lower force clamp; 3, upper force groove; 4, upper opening; 5, lower force groove; 6, lower opening; 7, bolt grommet; 8, bolt tension ring; 9, tension ring end; 10, tension ring body; 11, bolt. DETAILED DESCRIPTION

[0021] The specific embodiments of the utility model are further explained in detail as follows by comparing the drawings and the description of the embodiments, the shape of each component involved, the structure, the mutual position and connecting relationship between each part, the function of each part and the working principle, etc.:

[0022] As shown in the accompanying drawings Figure 1The utility model discloses a bolt tensile strength testing device, including upper force clamp 1, lower force clamp 2, the upper force clamp 1 lower part sets up upper force groove 3, the upper force groove 3 lower extreme sets up upper opening 4, the lower force clamp 2 upper part sets up lower force groove 5, and the lower force groove 5 upper end sets up lower opening 6, and the upper force groove 3 is clamped and is equipped with bolt grommet 7, and the lower force groove 5 is clamped and is equipped with bolt tension ring 8. The above structure, for the deficiency in the prior art, proposes the technical scheme of improvement. When setting up the structure, respectively make upper force clamp 1, lower force clamp 2, and upper force clamp 1, lower force clamp 2 need high strength, and the upper part of upper force clamp 1 sets up upper force groove 3, and the lower extreme of upper force groove 3 sets up upper opening 4, and the upper force groove 3 is used to place bolt grommet 7, and bolt 11 passes through bolt grommet 7, and the end of bolt is clamped on the upper part of bolt grommet 7, and the screw rod of bolt 11 passes through bolt grommet 7 and passes through upper opening 4, and then extends to the position below upper force clamp, and the screw rod of bolt 11 and bolt tension ring 8 are conveniently screwed and connected. The upper part of lower force clamp 2 sets up lower force groove 5, and the lower end of lower force groove 5 sets up lower opening 6, and the inside of lower force groove 5 is used to place bolt tension ring 8, and the tension ring end 9 of bolt tension ring 8 is clamped in lower force groove 5, and the tension ring body 10 of tension ring end 9 passes through lower opening 6, and is conveniently screwed and connected with the screw rod of bolt 11. When carrying out tension test, fixed lower force clamp 2 (or fixed upper force clamp 1), and the force component exerts the force in the upward direction on upper force clamp 1 (or forces lower force clamp 2), and upper force clamp and lower force clamp move in the opposite direction, and exert the tension on screw rod 11, and reliably carry out tension test. The purpose of the structure of the utility model is reliably realized the connection and exertion of tension of bolt. When testing different models and sizes of bolts, replace the grommet through-hole with different diameters, the diameter of the corresponding grommet through-hole is slightly larger than the diameter of the corresponding screw rod of the bolt, the diameter of the end of the bolt is larger than the diameter of the grommet through-hole, and the bolt tension ring 8 with the corresponding diameter inner diameter is replaced, the universality of the testing device is improved, and the manufacturing cost is reduced. The bolt tensile strength testing device disclosed by the utility model has the advantages of simple structure, convenient and reliable bolt tensile strength testing, ensuring that the clamp can withstand different sizes of tension, and replacing the local components can be suitable for bolt tensile test of different models and sizes, improving the universality of the equipment.

[0023] The upper force groove 3 and the upper opening 4 of the upper force clamp 1 are in T-shaped structure, and the lower force groove 5 and the lower opening 6 of the lower force clamp 2 are in inverted T-shaped structure. The above structure, the upper force clamp is used for clamping the corresponding bolt grommet, and the bolt grommet is used for fixing the bolt to be tested.

[0024] The bolt tension ring 8 comprises a tension ring end 9 and a tension ring body 10, the tension ring end 9 and the tension ring body 10 are in T-shaped structure, the tension ring body 10 is in hollow structure, and a threaded part is arranged on the inner ring of the tension ring body 10. The above structure, the tension ring end 9 and the tension ring body 10 are in integral structure, so that the strength is ensured. The threaded part on the inner ring of the tension ring body matches the corresponding bolt, and the bolt is fixedly connected, so that the clamp can be used for tension test.

[0025] The upper force bearing clamp 1 is connected with the tension cylinder, and the lower force bearing clamp 2 is connected with the clamping seat. Alternatively, the upper force bearing clamp 1 is connected with the clamping seat, and the lower force bearing clamp 2 is connected with the tension cylinder. The above structure, the cylinder can be extended and retracted to drive the corresponding force bearing clamp to move away, so as to apply pressure to the bolt, and when the cylinder is close, the bolt is loosened, and the bolt can be disassembled.

[0026] The tension ring end 9 of the bolt tension ring 8 is located in the lower force bearing groove 5, and the tension ring body 10 of the bolt tension ring 8 passes through the lower opening 6. The bolt gasket ring 7 is located in the upper force bearing groove 3, the bolt 11 passes through the bolt gasket ring 7, and the bolt 11 simultaneously passes through the upper opening 4 and is screwed and connected with the tension ring body 10. The center of the bolt gasket ring 7 is provided with a gasket through hole 12.

[0027] The upper force bearing clamp 1 and the lower force bearing clamp 2 are made of metal material. The above structure, the upper force bearing clamp 1 and the lower force bearing clamp 2 have high strength and can be used for a long time, so that the cost is reduced.

[0028] The utility model discloses bolt tensile strength testing device, make upper force clamp 1, lower force clamp 2 respectively, upper force clamp 1, lower force clamp 2 need high strength, upper force clamp 1 lower part sets up upper force groove 3, upper force groove 3 lower extreme sets up upper opening 4, and the bolt grommet 7 is used for placing in upper force groove 3, and the bolt 11 passes through bolt grommet 7, and the end head of bolt is clamped on bolt grommet 7 upper part, and the screw rod of bolt 11 passes through bolt grommet 7 and passes through upper opening 4, and then extends to the position below upper force clamp, and the screw rod of bolt 11 and bolt tension ring 8 are connected conveniently by screwing. Lower force clamp 2 upper part sets up lower force groove 5, and lower force groove 5 upper end sets up lower opening 6, and the bolt tension ring 8 is used for placing in lower force groove 5 inside, and the tension ring end head 9 of bolt tension ring 8 is clamped in lower force groove 5, and the tension ring body 10 of tension ring end head 9 passes through lower opening 6, and the screw rod of bolt 11 is connected conveniently by screwing. When carrying out tension test, fixed lower force clamp 2 (or fixed upper force clamp 1), and the force component exerts the force in the upward direction in upper force clamp 1 (or force lower force clamp 2), and upper force clamp and lower force clamp move to the opposite direction, and exert the tension on screw rod 11, and can reliably carry out tension test. When testing different models and sizes of bolt, replace the grommet through-hole with different diameters, and the diameter of the corresponding grommet through-hole is slightly larger than the diameter of the corresponding screw rod, and the diameter of the end head of bolt is larger than the diameter of the grommet through-hole, and replace the bolt tension ring 8 with the corresponding diameter inner diameter thread part, improve the versatility of testing device, and reduce the manufacturing cost.

[0029] The utility model has been described exemplarily above in connection with the drawings, and obviously, the specific implementation of the utility model is not limited by the above-mentioned mode, as long as various improvements are made by adopting the method concept and technical scheme of the utility model, or the concept and technical scheme of the utility model is directly applied to other occasions without improvement, which is within the protection scope of the utility model.

Claims

1. A bolt tensile strength testing device, characterized by: The utility model provides a kind of bolt tensioning device, including upper force clamp (1), lower force clamp (2), upper force clamp (1) lower part is provided with upper force groove (3), and upper force groove (3) lower end is provided with upper opening (4), and lower force clamp (2) upper part is provided with lower force groove (5), and lower force groove (5) upper end is provided with lower opening (6), and upper force groove (3) is clamped with bolt washer (7) inside, and lower force groove (5) is clamped with bolt tension ring (8) inside.

2. The bolt tensile strength testing device of claim 1, wherein: The upper force groove (3) and the upper opening (4) of the upper force clamp (1) are in T-shaped structure, and the lower force groove (5) and the lower opening (6) of the lower force clamp (2) are in inverted T-shaped structure.

3. Bolt tensile strength testing apparatus according to claim 1 or 2, characterized in that: The bolt tension ring (8) includes a tension ring end (9) and a tension ring body (10), and the tension ring end (9) and the tension ring body (10) are in T-shaped structure, the tension ring body (10) is a hollow structure, and the tension ring body (10) is provided with a threaded portion in the inner ring.

4. The bolt tensile strength testing device of claim 1 or 2, wherein: The upper force clamp (1) is connected with a tension cylinder.

5. The bolt tensile strength testing device of claim 1 or 2, wherein: The lower force clamp (2) is connected with a clamping seat.

6. The bolt tensile strength testing device of claim 3, wherein: The tension ring end (9) of the bolt tension ring (8) is located in the lower force groove (5), and the tension ring body (10) of the bolt tension ring (8) passes through the lower opening (6).

7. The bolt tensile strength testing device of claim 1 or 2, wherein: The bolt washer (7) is located in the upper force groove (3), the bolt (11) passes through the bolt washer (7), and the bolt (11) simultaneously passes through the upper opening (4) to screw and connect the tension ring body (10).

8. The bolt tensile strength testing device of claim 1 or 2, wherein: The bolt washer (7) is provided with a washer through hole (12) in the center.

9. The bolt tensile strength testing device of claim 1 or 2, wherein: The upper force clamp (1) and the lower force clamp (2) are both made of metal material.

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