CN217980767U - Fastening testing device for testing bolt fastening durability - Google Patents
Fastening testing device for testing bolt fastening durability Download PDFInfo
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- CN217980767U CN217980767U CN202222257774.5U CN202222257774U CN217980767U CN 217980767 U CN217980767 U CN 217980767U CN 202222257774 U CN202222257774 U CN 202222257774U CN 217980767 U CN217980767 U CN 217980767U
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Abstract
The utility model discloses a fastening testing arrangement for bolt-up durability test, solved under the limited equipment load condition in laboratory, be difficult to realize the problem of fluctuating bolt load and durability test under the operating condition, its technical scheme main points are the flange including two upper and lower parallel relative settings, fixed mounting is used for connecting the outer load application pole of outside test equipment at the surface of two flanges, the contact mounting carries out the rigidity adjusting device that rigidity was adjusted between two flanges, fixed mounting is used for carrying out measuring axial force measuring device to the axial force of test bolt at the surface of one of them flange, axial force measuring device, the mounting hole that supplies the test bolt to wear to establish the installation is seted up to the intercommunication on two flanges and the rigidity adjusting device, the utility model discloses a fastening testing arrangement for bolt-up durability test can satisfy bolt internal force and durability measurement needs when the bolt receives the external load under the laboratory condition, simple structure, simple operation.
Description
Technical Field
The utility model relates to a bolt-up testing arrangement, in particular to a fastening testing arrangement for test of bolt-up durability.
Background
Along with the rapid improvement of the requirement of mechanical equipment on the fastening quality of bolt connection, the tests on actual fastening parameters and fastening effects are increasingly emphasized, and especially the bolt fastening quality of equipment in an alternating load service environment is related to the safety of the equipment (such as wind power, offshore operation platforms and the like). The equipment has long working time, and if the fastening quality of the flange does not reach the standard, the bolt is fatigue-broken, and further serious safety accident risks such as tower collapse are caused; however, the above-mentioned equipment is bulky and heavy, and is subject to large amplitude and fluctuation of external load, which makes it difficult to measure in actual engineering. To evaluate the quality of bolt tightening under laboratory conditions, selecting appropriate tightening parameters generally requires scaled-down internal force and durability tests on the same type of bolt. The method is limited to laboratory test of equipment tonnage, and under the condition of limited equipment load, the test of bolt load fluctuation and durability under actual working conditions is difficult to realize.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a fastening testing arrangement for bolt-up durability test can satisfy the bolt internal force and the durability measurement needs when receiving external load to the bolt under the laboratory condition, simple structure, simple operation.
The above technical purpose of the present invention can be achieved by the following technical solutions:
a fastening test device for bolt fastening durability test includes:
the upper flange and the lower flange are oppositely arranged in parallel;
the external load applying rods are fixedly arranged on the outer surfaces of the two flanges and are used for connecting external testing equipment;
the rigidity adjusting device is arranged between the two flanges in a contact manner and used for adjusting the rigidity;
the axial force measuring device is fixedly arranged on the outer surface of one flange and used for measuring the axial force of the test bolt;
and the axial force measuring device, the two flanges and the rigidity adjusting device are communicated with each other and provided with mounting holes for the penetration installation of the test bolts.
Preferably, the end of the external load application rod is provided with a thread for connecting external test equipment.
Preferably, the number of the mounting holes is not less than 1.
Preferably, the rigidity adjusting device is a rigidity cushion block with a surface parallel to and abutted against the upper flange and the lower flange.
Preferably, the opposite inner surfaces of the upper and lower flanges are provided with mounting grooves at the mounting holes, and the rigidity adjusting device is a hollow sleeve which is mounted in the mounting grooves and is independently sleeved on the test bolt.
Preferably, the hollow sleeve is dumbbell-shaped, and both ends of the hollow sleeve extend in the circumferential direction to abut against the inner surface of the flange.
To sum up, the utility model discloses following beneficial effect has:
the flange, the rigidity adjusting device and the axial force measuring device can pre-tighten the measuring bolt after being connected, an external load is applied through the external load applying rod, the axial force measuring device can measure in real time, the influence of the external load on the load of the testing bolt is analyzed, rigidity adjustment can be carried out through the rigidity adjusting device, rigidity ratio adjustment between the flange and the testing bolt is achieved, the change range of the axial load of the testing bolt can meet the expectation, the practical use working condition can be simulated under the experiment condition, and the fastening efficiency test of the testing bolt can be conveniently achieved on limited experimental equipment.
Drawings
FIG. 1 is a schematic structural view of a fastening test device according to the present application;
fig. 2 is a schematic structural diagram of another exemplary fastening test apparatus.
In the figure: 1. a flange; 11. mounting grooves; 2. an external load applying rod; 3. a stiffness adjustment device; 4. an axial force measuring device; 5. mounting holes; 6. testing the bolt; 7. and a nut.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
According to one or more embodiments, a fastening test device for bolt fastening durability test is disclosed, as shown in fig. 1, and comprises two flanges 1, an external load applying rod 2, a rigidity adjusting device 3, an axial force measuring device 4, a test bolt 6 for fastening and a nut 7 matched with the test bolt for fastening.
The two flanges 1 are oppositely arranged in parallel, and for the sake of clarity, the two flanges are divided into an upper flange and a lower flange by taking fig. 1 as a reference, and the opposite surfaces of the two flanges 1 are defined as inner surfaces, and the other two surfaces are outer surfaces and can be divided into an upper outer surface and a lower outer surface.
The external load applying rods 2 are provided with two groups, are respectively and fixedly installed on the outer surfaces of the two flanges 1, and are connected with external testing equipment, such as a tensile testing machine or a fatigue testing machine, on the upper side and the lower side. A screw thread for attachment is provided at the end of the external load applying rod 2.
The axial force measuring device 4 is fixedly arranged on the outer surface of one flange 1 and is used for measuring the load of the test bolt 6. The axial force measuring device 4, the two flanges 1 and the rigidity adjusting device 3 are communicated with each other to form a mounting hole 5, the test bolt 6 is arranged in a penetrating mode through the mounting hole 5, and the axial force measuring device is fastened through the test bolt 6 and the nut 7. The number of the mounting holes 5 is not less than 1, and as shown in fig. 1, two mounting holes 5 are provided, and measurement can be performed by mounting two test bolts 6.
In one example, the rigidity adjusting device 3 is disposed between the two flanges 1, and is a rigidity cushion block abutting against the inner surfaces of the two flanges 1, the upper and lower surfaces of the rigidity cushion block are horizontal and abut against the inner surfaces of the two flanges 1, and the mounting hole 5 is directly opened in the surface of the rigidity cushion block along the axial direction.
In one example, as shown in fig. 2, the rigidity adjusting device 3 is a hollow sleeve disposed between two flanges 1, mounting grooves 11 are formed in positions of the inner surfaces of the flanges 1 corresponding to the mounting holes 5, the center of the hollow sleeve is communicated with the mounting holes 5 and corresponds to the mounting holes 5, the test bolts 6 are inserted through the hollow sleeve, the hollow sleeve is dumbbell-shaped, the middle of the hollow sleeve is small, the two ends of the hollow sleeve are large, the hollow sleeve abuts against the two ends of the inner surface of the flange 1 and extends circumferentially, and a contact surface with the flange 1 is increased. A separate mounting groove 11 and hollow sleeve are provided corresponding to each test bolt 6. When the rigidity of the test bolt 6 is larger, the flange 1 and the rigidity adjusting device 3 can be adopted, and the hollow sleeve with a smaller cross section area is used as the rigidity adjusting device 3, so that the overall rigidity of the flange 1 can be further reduced.
For the test bolt 6, the pretightening force and the required additional applied load of the test bolt 6 are calculated, and the rigidity ratio of the required flange 1 and the test bolt 6 is obtained by combining the tonnage calculation of the experimental equipment. And selecting the size of the flange 1 and the material of the rigidity adjusting device 3 according to the calculation result so that the total rigidity of the flange 1 is matched with the rigidity of the test bolt 6.
The rigidity ratio between the test flange 1 and the test bolt 6 is adjusted by adjusting the material and the shape of the rigidity adjusting device 3, after the rigidity ratio is changed, when the external load applying rod 2 is loaded, the change amplitude of the circumferential load of the test bolt 6 is in accordance with expectation, so that the experiment can simulate the actual use working condition.
After the flange 1, the rigidity adjusting device 3 and the axial force measuring device 4 are connected, pre-tightening is carried out on the test bolt 6;
placing the connected test device in a tensile test machine or a fatigue test machine, and performing load application and durability test;
in the testing process, the real-time change of the load of the testing bolt 6 is obtained by the axial force measuring device 4, and the influence of the external load on the load of the testing bolt 6 is analyzed.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.
Claims (6)
1. A fastening test device for bolt fastening durability test is characterized by comprising:
the upper and the lower flanges (1) are oppositely arranged in parallel;
the external load applying rods (2) are fixedly arranged on the outer surfaces of the two flanges (1) and are used for connecting external test equipment;
a rigidity adjusting device (3) which is installed between the two flanges (1) in a contact manner and used for adjusting the rigidity;
the axial force measuring device (4) is fixedly arranged on the outer surface of one flange (1) and is used for measuring the axial force of the test bolt (6);
and the axial force measuring device (4), the two flanges (1) and the rigidity adjusting device (3) are communicated with each other to be provided with mounting holes (5) for the test bolts (6) to penetrate through for installation.
2. The fastening test device for bolt fastening durability test as claimed in claim 1, wherein: the end of the external load applying rod (2) is provided with a thread for connecting external test equipment.
3. The fastening test device for bolt fastening durability test as claimed in claim 1, wherein: the number of the mounting holes (5) is not less than 1.
4. The fastening test device for bolt fastening durability test as claimed in claim 3, wherein: the rigidity adjusting device (3) is a rigidity cushion block with a surface parallel to and abutted between the upper flange and the lower flange (1).
5. The fastening test device for bolt fastening durability test as claimed in claim 3, wherein: the inner surfaces of the upper flange (1) and the lower flange (1) opposite to each other are provided with mounting grooves (11) in the mounting holes (5), and the rigidity adjusting device (3) is a hollow sleeve which is mounted in the mounting grooves (11) and is independently sleeved on the test bolt (6).
6. The fastening test device for bolt fastening durability test as claimed in claim 5, wherein: the hollow sleeve is dumbbell-shaped, and two ends of the hollow sleeve extend to the circumferential direction to be abutted against the inner surface of the flange (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222257774.5U CN217980767U (en) | 2022-08-26 | 2022-08-26 | Fastening testing device for testing bolt fastening durability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222257774.5U CN217980767U (en) | 2022-08-26 | 2022-08-26 | Fastening testing device for testing bolt fastening durability |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217980767U true CN217980767U (en) | 2022-12-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222257774.5U Active CN217980767U (en) | 2022-08-26 | 2022-08-26 | Fastening testing device for testing bolt fastening durability |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217980767U (en) |
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2022
- 2022-08-26 CN CN202222257774.5U patent/CN217980767U/en active Active
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