CN215812170U - Stud fatigue performance testing device - Google Patents
Stud fatigue performance testing device Download PDFInfo
- Publication number
- CN215812170U CN215812170U CN202121951441.1U CN202121951441U CN215812170U CN 215812170 U CN215812170 U CN 215812170U CN 202121951441 U CN202121951441 U CN 202121951441U CN 215812170 U CN215812170 U CN 215812170U
- Authority
- CN
- China
- Prior art keywords
- nut
- conical surface
- stud
- section
- cooperation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model discloses a fatigue performance testing device for a stud bolt, which comprises an outer barrel, a matching nut, a top cap and a connecting rod, wherein an inner hole axially penetrating through the outer barrel is arranged in the outer barrel, the inner hole comprises a thread section, a conical section and a straight hole section which are sequentially arranged, one end of the connecting rod and the top cap are sequentially arranged in the thread section from outside to inside, the matching nut is arranged in the conical section, the aperture of the straight hole section is matched with the outer diameter of the stud bolt, the top cap tightly pushes the matching nut, and the matching nut is axially divided into at least two parts. The bolt sample fracture part can be easily taken out, and can be repeatedly used for many times, so that the test cost is reduced, and the working efficiency is improved.
Description
Technical Field
The utility model relates to a bolt fatigue performance testing device, in particular to a stud fatigue performance testing device.
Background
The threaded connection is an important connection mode of mechanical parts and is widely applied to the fields of aviation, aerospace, engineering machinery, automobiles and the like. The failure fracture of the threaded connection mainly occurs at the thread, and the fatigue fracture is a main failure mode of the thread failure, so that the strengthening of the thread and the reasonable assessment of the fatigue performance are particularly important.
The traditional stud fatigue performance test is that after the threads of a stud sample are strengthened, the two threads of a pairing nut and the stud are connected, the pairing nut is clamped on a fatigue testing machine for testing, and the pairing nut can adopt a simple nut or a nut with a clamping end. This method has several disadvantages: 1) after fatigue test, the threads of the matched nut deform and are difficult to screw out, so that the matched nut cannot be reused, the use amount is large, and the cost is high. 2) When the matched nut is directly clamped on the fatigue testing machine, the stress deformation of the matched nut can damage the threads of the stud bolt sample, so that the test result is influenced. 3) Because the nut can not take out after stud sample fracture, be unfavorable for fracture analysis, need cut off usually to additionally increased the process, and can not carry out the microscopic morphology to the screw-thread fit section and observe.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problems that a traditional stud fatigue performance testing tool cannot be reused, is high in testing cost, is difficult to disassemble, is low in working efficiency and the like, and provides a stud fatigue performance testing device which can be reused and is simple to disassemble.
In order to solve the technical problems, the utility model adopts the following technical scheme: the utility model provides a stud fatigue performance testing arrangement, its includes urceolus, cooperation nut, hood and connecting rod, set up the axial in the urceolus and link up the hole of urceolus, the hole is including the screw thread section, conical surface section and the straight hole section that set gradually, install from outer to interior in proper order in the screw thread section the one end of connecting rod reaches the hood, install in the conical surface section cooperation nut, the aperture of straight hole section with stud's external diameter matches, just the hood will cooperation nut pushes up tightly, cooperation nut is split into at least two parts by the axial.
The utility model divides the matching nut into at least two parts axially, and by means of the arrangement of the conical surface section and the top cap in the inner hole of the outer cylinder, the matching nut is spliced into a whole in the outer cylinder and then connected with the thread of the stud bolt to test the fatigue performance of the stud bolt.
Preferably, the matching nut is formed by splicing half nuts.
For making the mounted position of cooperation nut in the urceolus stable, the both ends of cooperation nut have first cooperation conical surface respectively, be equipped with the second cooperation conical surface in the hood, the first cooperation conical surface of the one end of cooperation nut with the cooperation of the second cooperation conical surface of hood, the first cooperation conical surface of the other end of cooperation nut with the conical surface section cooperation of hole to the location of cooperation nut is realized through the cooperation of cooperation nut and hood and conical surface section.
For further improvement the installation stability of cooperation nut, the fore-set is established to the hood endotheca, the fore-set card is gone into the screw hole of cooperation nut.
Compared with the prior art, the utility model has the beneficial effects that:
1. the utility model divides the matching nut into at least two parts axially, and by means of the arrangement of the conical surface section and the top cap in the inner hole of the outer cylinder, the matching nut is spliced into a whole in the outer cylinder and then connected with the thread of the stud bolt to test the fatigue performance of the stud bolt.
2. After the utility model is used for testing the fatigue performance once, the utility model can be repeatedly used for many times, thereby reducing the test cost and improving the working efficiency.
3. The utility model can be suitable for stud bolt samples with different dimensions by replacing matched nuts with different specifications, and the end part of the matched nut is provided with a first matched conical surface which is matched with the conical surface section of the inner hole of the outer cylinder, so that self-centering can be realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is an assembly view of the stud fatigue property testing device of the present invention.
FIG. 2 is a view showing the outer cylinder structure of the stud fatigue property testing apparatus of the present invention.
FIG. 3 is a view showing a structure of a fitting state of a fitting nut of the stud fatigue property testing apparatus of the present invention.
FIG. 4 is a top cap structure view of the stud fatigue property testing apparatus of the present invention.
FIG. 5 is a structural view of a connecting rod of the stud fatigue property testing apparatus of the present invention.
FIG. 6 is a schematic view of an example of application of the stud fatigue property testing apparatus of the present invention.
In the figure: 1-outer cylinder, 1 a-thread section, 1 b-conical section, and 1 c-straight hole section; 2-half nut, 2 a-threaded hole; 3-top cap, 3 a-hexagon socket, 3 b-conical surface; 4-connecting rod, 4 a-clamping end, 4 b-threaded end; 5-stud specimen.
Detailed Description
The utility model is further described below with reference to specific preferred embodiments, without thereby limiting the scope of protection of the utility model.
For convenience of description, the relative positional relationship of the components, such as: the descriptions of the upper, lower, left, right, etc. are described with reference to the layout directions of the drawings in the specification, and do not limit the structure of the present patent.
As shown in fig. 1 to 5, an embodiment of the stud fatigue performance testing apparatus of the present invention includes an outer cylinder 1, a fitting nut 2, a top cap 3, and a connecting rod 4.
An inner hole which is axially communicated is formed in the outer barrel 1, and the inner hole comprises a thread section 1a, a conical surface section 1b and a straight hole section 1c which are sequentially arranged. The aperture of the straight hole section 1c is matched with the outer diameter of the stud bolt sample 5.
The matching nut 2 is axially divided into at least two parts, two ends of the matching nut 2 are respectively provided with a first matching conical surface 2b, and an axially through threaded hole 2a is formed in the matching nut 2. In this embodiment, the mating nut 2 is formed by splicing a pair of half nuts.
The outer portion of the top cap 3 is provided with threads, the upper portion of the top cap 3 is provided with a middle hole 3a, the lower portion of the top cap 3 is provided with a second matching conical surface 3b, and the middle hole 3a and the second matching conical surface 3b are arranged coaxially.
The connecting rod 4 comprises a clamping end 4a for connecting a testing machine and a threaded end 4b for abutting against the top cap 3.
The threaded end 4b of the connecting rod 4 and the top cap 3 are sequentially arranged in the threaded section 1a of the outer barrel 1 from outside to inside, and the threaded section 1a is in threaded connection with the external thread of the top cap 3 and the threaded end 4b of the connecting rod 4; the cooperation nut 2, the hood 3 and the connecting rod 4 are installed in the hole of urceolus 1 in proper order, through with the first cooperation conical surface 2b of 2 upper ends of cooperation nut with the cooperation of the second cooperation conical surface 3b of hood 3, the first cooperation conical surface 2b of 2 lower ends of cooperation nut with the cooperation of the conical surface section 1b of urceolus 1, make cooperation nut 2 be fixed a position and form a complete nut after fixing.
For further improvement cooperation nut 2's installation stability, the mesopore 3a fit in of hood 3 sets up fore-set 6, fore-set 6 card is gone into in the screw hole 2a of cooperation nut 2.
As shown in fig. 6, when the utility model is used, the matching nut 2 is used for connecting the threads at one end of the stud bolt sample 5, the clamping end 4a of the connecting rod 4 is connected with a testing machine, and the testing machine applies a testing load F to the stud bolt sample 5 through the clamping end 4a of the connecting rod 4, the conical section 1b of the outer cylinder 1 and the matching nut 2 to perform a fatigue test. After the test is completed, the matching nut 2 is used for disassembling the connecting rod 4, the top cap 3 and the outer barrel 1, the matching nut 2 can be disassembled and disassembled, the fracture part of the stud sample 5 can be taken out conveniently, and the follow-up fracture research and analysis are facilitated. By replacing the matching nuts 2 of different specifications, the method can be suitable for stud bolts 5 of different dimensions.
The above description is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and those skilled in the art can make many possible variations and modifications to the technical solution of the present invention or modify equivalent embodiments using the technical content disclosed above without departing from the technical solution of the present invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention should fall within the protection scope of the technical scheme of the present invention, unless the technical spirit of the present invention departs from the content of the technical scheme of the present invention.
Claims (4)
1. The utility model provides a stud fatigue performance testing arrangement, its characterized in that, includes urceolus, cooperation nut, hood and connecting rod, set up the axial in the urceolus and link up the hole of urceolus, the hole is including the screw thread section, conical surface section and the straight hole section that set gradually, install from outer to interior in proper order in the screw thread section the one end of connecting rod reaches the hood, install in the conical surface section cooperation nut, the aperture of straight hole section with stud's external diameter matches, just the hood will cooperation nut pushes up tightly, cooperation nut is split into at least two parts by the axial.
2. The stud bolt fatigue performance testing device of claim 1, wherein the mating nut is split from half nuts.
3. The stud fatigue performance testing device of claim 1, wherein the two ends of the fitting nut are respectively provided with a first fitting conical surface, the top cap is internally provided with a second fitting conical surface, the first fitting conical surface at one end of the fitting nut is matched with the second fitting conical surface of the top cap, and the first fitting conical surface at the other end of the fitting nut is matched with the conical surface section of the inner hole.
4. The stud fatigue performance testing device of claim 1, wherein a top post is sleeved in the top cap, and the top post is clamped into a threaded hole of the mating nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121951441.1U CN215812170U (en) | 2021-08-19 | 2021-08-19 | Stud fatigue performance testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121951441.1U CN215812170U (en) | 2021-08-19 | 2021-08-19 | Stud fatigue performance testing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215812170U true CN215812170U (en) | 2022-02-11 |
Family
ID=80133521
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121951441.1U Active CN215812170U (en) | 2021-08-19 | 2021-08-19 | Stud fatigue performance testing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215812170U (en) |
-
2021
- 2021-08-19 CN CN202121951441.1U patent/CN215812170U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9677982B2 (en) | Jig mounting device for material testing machine | |
| CN203772637U (en) | Minimum bolt tensile load test fixture | |
| CN215812170U (en) | Stud fatigue performance testing device | |
| CN213933352U (en) | Bolt tensile fatigue test universal fixturing | |
| CN103084673A (en) | Double-end pipe joint coaxial positioning turning clamp | |
| CN110441136B (en) | Stretching-twisting composite clamp based on positive and negative thread structure | |
| CN205352833U (en) | Bolt tensile test universal fixturing | |
| CN211504980U (en) | Pipe fatigue test clamping tool | |
| CN201283562Y (en) | Opening spring pin dismounting tool | |
| CN102175520B (en) | Device for testing tensile strength of coating and using method thereof | |
| CN213068160U (en) | Special clamp for bolt minimum failure torque test | |
| CN201535737U (en) | Cylindrical threaded clamp | |
| CN202125946U (en) | Oil gun air cylinder assembly | |
| CN219434511U (en) | High-frequency fatigue testing device for bolt connection pair | |
| CN220863907U (en) | Bush mounting tool | |
| CN214359932U (en) | Horizontal fixing device of overweight round pin axle of tower crane | |
| CN220207278U (en) | Centering clamping fatigue test fixture | |
| CN220084547U (en) | Screw thread tensile strength test fixture | |
| CN214334481U (en) | High-temperature alloy long bolt pull-bend fatigue test fixture | |
| CN215517818U (en) | Combined connecting rod | |
| CN219265970U (en) | Threaded rod piece shearing performance testing device | |
| CN210051637U (en) | Test fixture for testing tensile compression performance of carbon fiber composite circular tube | |
| CN216525162U (en) | Tool for breakage tension test of joint with rotating nut | |
| CN203385615U (en) | Auxiliary appliance for testing tensile property of U-shaped bolt | |
| CN219391587U (en) | Bolt axial load fatigue test fixture convenient to dismouting |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |