CN221007068U - Bolt tensile test device - Google Patents
Bolt tensile test device Download PDFInfo
- Publication number
- CN221007068U CN221007068U CN202322023288.1U CN202322023288U CN221007068U CN 221007068 U CN221007068 U CN 221007068U CN 202322023288 U CN202322023288 U CN 202322023288U CN 221007068 U CN221007068 U CN 221007068U
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- bolt
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- clamping body
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- 238000009864 tensile test Methods 0.000 title claims abstract description 26
- 238000009434 installation Methods 0.000 claims abstract description 47
- 238000012360 testing method Methods 0.000 claims abstract description 46
- 238000005452 bending Methods 0.000 abstract description 7
- 239000011229 interlayer Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
A bolt tensile test device comprises an upper clamping body, an upper joint bearing, an upper bolt installation body, a lower joint bearing and a lower clamping body. According to the utility model, the knuckle bearings capable of adjusting the angles are arranged in the upper clamping body and the lower clamping body, so that the automatic adjustment of the angles of the bolt installation bodies is realized, the additional bending moment generated by the bolts in the tensile test can be avoided, the test result is more accurate, and the bolt installation space and the bolt passing holes are arranged in the device, so that the device is convenient to install and detach, high in efficiency and easy to operate.
Description
Technical Field
The utility model relates to a bolt axial tensile test device which is used for testing the axial tensile property of a bolt.
Background
The tensile property test of the bolt is carried out by respectively installing a bolt head and a nut on a test clamp, fixedly connecting the clamp with a testing machine and carrying out the tensile test through the testing machine. At present, most test devices adopt a quasi-static stretching mode, and additional bending moment is generated in the test process due to eccentric problems in test piece installation, fixture and test machine installation, so that the accuracy of test results is affected.
A bolt tensile test fixture of Chinese patent CN202403972u comprises an upper clamping body 1, a bushing 2 and a lower clamping body 3, wherein the bushing 2 is two bushings which are respectively arranged in round holes of the upper clamping body 1 and the lower clamping body 3. After the bushing and the bolt are installed, accumulated coaxiality tolerance may cause that the bolt cannot be installed with the clamp in a resistance-free installation test, eccentric bending moment is caused, and the stress form of the bolt is different from that of the tension bolt, so that a test result is deviated.
Disclosure of Invention
The utility model solves the problem of eliminating the influence of additional bending moment generated when the bolt is subjected to axial tensile test, realizes that one set of bolt tensile test device can test bolts with various specifications, and has convenient installation and disassembly and high test efficiency.
The technical scheme of the utility model is as follows: a bolt tensile testing apparatus comprising: an upper clamping body (1), an upper bolt mounting body (5), a lower bolt mounting body (12) and a lower clamping body (16). A bearing mounting hole is formed in the upper portion of the upper bolt mounting body (5), the upper bolt mounting body (5) is provided with a test bolt (8) and a mounting opening (6) of the upper sandwich plate (7), and a round hole (18) for the test bolt (8) to pass through is formed in the lower portion of the upper bolt mounting body (5); a round hole (20) for the test bolt (8) to pass through is formed in the upper part of the lower bolt mounting body (12), a test nut (10) and a mounting opening (11) of the lower sandwich plate are formed in the lower bolt mounting body (12), and a bearing mounting hole is formed in the lower part of the lower bolt mounting body (12); two bolt holes are respectively arranged on the upper clamping body (1) and the lower clamping body (16).
Further, the two bolt holes on the upper clamping body (1) are coaxial and have the same diameter, and are connected with the upper bolt mounting body (5) through the upper bearing bolts (3); the two bolt holes on the lower clamping body (16) are coaxial and have the same diameter, and are connected with the lower bolt mounting body (12) through the lower bearing bolts (15).
Further, the height of the installation limit (17) of the upper sandwich plate (7) of the upper installation body (5) is 50% -100% of the thickness of the upper sandwich plate (7); the height of the installation limit (19) of the lower sandwich plate (9) of the lower installation body (12) is 50-100% of the thickness of the lower sandwich plate (9).
Further, the installation limit (17) of the upper installation body (5) is matched with the size of the upper sandwich plate (7), and the installation limit (19) of the lower installation body (12) is matched with the size of the lower sandwich plate (9).
Compared with the traditional bolt tensile test device, the bolt tensile test device has the following beneficial effects:
According to the utility model, the upper bolt installation body and the lower bolt installation body become two-force components after the test bolts are fixed through the angle adjusting capability of the self-lubricating joint bearing, and the nodes at the two sides are free to rotate, so that the additional bending moment effect generated in the process of carrying out the axial tensile test on the bolts is effectively avoided.
The bolt installation space and the bolt through hole are reserved on the bolt installation body, so that a set of device can easily perform bolt tensile tests with various specifications, and the operation is convenient. When bolts with different specifications are tested, only the interlayer cushion blocks need to be replaced, and the manufacturing cost is low.
The application is described in further detail below with reference to the drawings of embodiments.
Drawings
Fig. 1 is a schematic diagram of a bolt tensile test fixture disclosed in the document of the prior patent CN202403972 u.
Fig. 2 is a schematic structural view of the bolt tensile test apparatus of the present utility model.
Fig. 3 is a schematic structural view of a clamping body of the bolt tensile test apparatus of the present utility model.
Fig. 4 is a schematic structural view of the upper mounting body of the bolt tensile test apparatus of the present utility model assembled with a self-lubricating knuckle bearing.
Fig. 5 is a schematic view showing a structure of a self-lubricating knuckle bearing assembled on a lower mounting body of the bolt tensile test apparatus of the present utility model.
Reference numerals illustrate:
The reference numerals in fig. 1 are respectively expressed as: 1-upper clamping head, 2-lining, 3-lower clamping head, 4-bolt, 13, 32-round hole.
Reference numerals in fig. 2 to 5 are respectively expressed as: the self-lubricating joint bearing comprises a 1-upper clamping body, a 2-upper self-lubricating joint bearing, a 3-upper bearing bolt, a 4-nut, a 5-upper bolt mounting body, a 6-mounting opening, a 7-upper clamping plate, an 8-test bolt, a 9-lower clamping plate, a 10-test nut, a 11-mounting opening, a 12-lower bolt mounting body, a 13-lower bearing bolt, a 14-nut, a 15-lower bearing bolt and a 16-lower clamping body, wherein the 17-mounting limit and the 18-test bolt pass through round holes, the 19-mounting limit and the 20-test bolt pass through round holes and 21-bearing bolt mounting holes.
Detailed Description
The utility model is further described below with reference to the accompanying drawings.
As shown in fig. 2 to 5, the bolt tensile test device of the utility model is connected with a test machine and comprises an upper clamping body and a lower clamping body, wherein the upper clamping body and the lower clamping body are respectively provided with two holes with the same diameter and coaxial with each other, and the holes are used for being connected with an upper bolt installation body and a lower bolt installation body through bearing bolts; the upper part of the upper bolt installation body (5) is provided with an opening for installing the self-lubricating knuckle bearing with adjustable angle, the upper bolt installation body is also provided with a test bolt (8) and an installation opening (6) of the upper sandwich plate (7), and the lower part of the upper bolt installation body is also provided with a round hole (18) for the test bolt (8) to pass through; the lower bolt mounting body (12) is provided with an opening for mounting the self-lubricating joint bearing with an adjustable angle, the lower bolt mounting body (12) is also provided with a test nut (10) and a mounting opening (11) of the lower sandwich plate (9), and is also provided with a round hole (20) for the test bolt (8) to pass through.
As shown in fig. 2 to 5, the self-lubricating knuckle bearings with adjustable angles are arranged in the upper bolt mounting body and the lower bolt mounting body in advance, the inner diameter of the bearings is the same as the diameter of the bearing bolts, and the thickness of the bearings is matched with the reserved size of the clamping body. The upper clamping body (1) is connected with the upper bolt mounting body (5) through an upper bearing bolt (3), an upper self-lubricating joint bearing (2) and an upper nut (4), and the lower clamping body (16) is connected with the lower bolt mounting body (12) through a lower bearing bolt (15), a lower self-lubricating joint bearing (13) and a lower nut (14).
As shown in fig. 2 to 5, when the bolt tensile test is performed, the upper sandwich plate (7) is placed into the installation limit (17) of the upper bolt installation body (5) through the installation opening (6), the lower sandwich plate (9) is placed into the installation limit (19) of the lower bolt installation body (12) through the installation opening (11), the test bolts (8) are placed into the installation limit (19) of the lower bolt installation body (12) through the installation opening (6) in the upper bolt installation body (5), sequentially pass through the upper sandwich plate (7), the round holes (18) of the upper bolt installation body, the round holes (20) of the lower bolt installation body, the lower sandwich plate (9) are then connected with the test nuts (10), the test bolts and the test devices are installed, and the upper clamp body and the lower clamp body are respectively fixed on the test machine during the test.
As shown in fig. 1, after the test bolts are mounted on the sandwich plate and the upper and lower bolt mounting bodies, certain coaxiality tolerance is accumulated, and when the test machine is connected with the upper and lower sandwich plates, certain mounting verticality deviation exists, and the deviation can cause the stress condition of the bolts to be undesirable during the test, so that the influence of additional bending moment exists. The self-lubricating knuckle bearing capable of automatically adjusting the angle is arranged on the upper bolt installation body and the lower bolt installation body, so that the bolt test device is of a two-force rod structure, nodes on two sides can rotate freely, and the influence of additional bending stress generated by installation deviation on test results is avoided.
The bolt installation space and the bolt through hole are reserved on the bolt installation body, so that a set of device can easily perform bolt tensile tests with various specifications, and the operation is convenient. When bolts with different specifications are tested, only the interlayer cushion blocks need to be replaced, so that the efficiency is high and the cost is low.
Claims (4)
1. A bolt tensile test device comprises an upper clamping body, an upper bolt installation body, a lower bolt installation body and a lower clamping body, and is characterized in that a round hole for a test bolt to pass through is formed in the lower part of the upper bolt installation body; the upper part of the lower bolt mounting body is provided with a round hole for the test bolt to pass through; the test bolts sequentially pass through the upper sandwich plate through the mounting openings in the upper bolt mounting body, the round holes of the upper bolt mounting body and the round holes of the lower bolt mounting body, and the lower sandwich plate is then connected with the test nuts.
2. The bolt tensile test device according to claim 1, wherein the upper bolt mounting body is reserved with openings for mounting and dismounting test bolts and upper sandwich plates, and is provided with mounting limit positions of the upper sandwich plates; the lower bolt installation body is reserved with an opening for installing and detaching the test nut and the lower sandwich plate, and is provided with an installation limit of the lower sandwich plate.
3. The bolt tensile test apparatus according to claim 1, wherein the upper clamping body and the lower clamping body are each provided with two bolt holes, and the upper bolt mounting body and the lower bolt mounting body are respectively used for mounting the upper self-lubricating knuckle bearing and the lower self-lubricating knuckle bearing, the upper clamping body and the upper bolt mounting body are connected by an upper bearing bolt and an upper nut, and the lower clamping body and the lower bolt mounting body are connected by a lower bearing bolt and a lower nut.
4. A bolt tensile testing apparatus according to claim 1, 2 or 3, wherein the upper clamping body and the lower clamping body are fixedly connected with the tester by clamping means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322023288.1U CN221007068U (en) | 2023-07-28 | 2023-07-28 | Bolt tensile test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322023288.1U CN221007068U (en) | 2023-07-28 | 2023-07-28 | Bolt tensile test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221007068U true CN221007068U (en) | 2024-05-24 |
Family
ID=91123866
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322023288.1U Active CN221007068U (en) | 2023-07-28 | 2023-07-28 | Bolt tensile test device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221007068U (en) |
-
2023
- 2023-07-28 CN CN202322023288.1U patent/CN221007068U/en active Active
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