CN212513432U - Large-scale expansion bolt expansion force testing arrangement - Google Patents
Large-scale expansion bolt expansion force testing arrangement Download PDFInfo
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- CN212513432U CN212513432U CN202022131893.7U CN202022131893U CN212513432U CN 212513432 U CN212513432 U CN 212513432U CN 202022131893 U CN202022131893 U CN 202022131893U CN 212513432 U CN212513432 U CN 212513432U
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Abstract
The utility model belongs to the mechanical fastener field, concretely relates to large-scale expansion bolts expansibility testing arrangement, this testing arrangement include loading sleeve, fixed sleeve, torque wrench and bench vice, and the laminating of loading sleeve is placed on fixed sleeve upper portion, and torque wrench vertical fixation is on the telescopic surface of loading, and the fixed sleeve card is in the department of keeping silent of bench vice. The utility model discloses an indirect test mode makes loading sleeve and expansion bolts subassembly assembly relation inefficacy required moment of torsion size through measuring, calculates the frictional force size between the assembly body and the expansion bolts assembly interface, and then assesses the expansive force of bolt. Through comparing the multiple measurement results of the expansion force of the multiple groups of bolts under different assembling pretightening forces, the linearity, the repeatability and the reliability of the assembling can be determined, and whether the expansion bolts meet the current assembling requirements or not can be comprehensively evaluated.
Description
Technical Field
The utility model belongs to the mechanical fastener field, concretely relates to large-scale expansion bolts expansibility testing arrangement.
Background
In the international thermonuclear fusion device, large expansion bolts of various specifications are widely used to assemble structural parts. Compared with a conventional bolt, the expansion bolt reduces or even eliminates the relative displacement between the assembly bodies in an interference fit mode on the premise of providing the axial pretightening force, greatly reduces the transverse shearing force of the bolt, reduces the fatigue damage of the part, prolongs the service life of the part and enhances the reliability of the assembly of the part. Therefore, the interference fit between the expansion bolt and the assembly hole of the structural component is an important factor for the effect, the quality of the fit effect depends on the relative contact area of the assembly interface and the expansion amount of the expansion taper sleeve, but the two are difficult to directly measure, and whether the assembly relation meets the requirement cannot be determined.
Therefore, it is necessary to provide a large expansion bolt expansion force testing device to solve the deficiencies of the prior art.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the purpose of needle provides a large-scale expansion bolts expansibility testing arrangement for realize expansion bolts and the engineering measurement of assembly part frictional force under the different pretightning forces of expansion bolts, confirm the optimum bolt pretightning force through the pretensioning effect on the one hand, on the other hand comes the design of inspection bolt through the relation of expansibility and pretightning force whether reasonable, synthesizes the reliability of aassessment assembly.
Realize the utility model discloses the technical scheme of purpose:
the utility model provides a large-scale expansion bolts expansibility testing arrangement, the device includes loading sleeve, fixed sleeve, torque wrench and bench vice, and the laminating of loading sleeve is placed on fixed sleeve upper portion, and torque wrench vertical fixation is on the telescopic surface of loading, and the fixed sleeve card is in the department of keeping silent of bench vice.
The loading sleeve and the fixing sleeve are both cylindrical, and the inner diameters of the central holes of the loading sleeve and the fixing sleeve are the same.
The surface of the loading sleeve is provided with a torque loading hole, and a torque wrench is inserted into the torque loading hole and connected with the loading sleeve.
And the central hole of the fixing sleeve is connected with the large-diameter end of the taper bolt of the expansion bolt component in an installing manner.
The lower end of the fixing sleeve is in contact with a fastening nut at the bottom of the expansion bolt assembly.
And the central hole of the loading sleeve is connected with the small-diameter end of the taper bolt of the expansion bolt component.
The utility model has the advantages of:
the utility model discloses an indirect test mode makes loading sleeve and expansion bolts subassembly assembly relation inefficacy required moment of torsion size through measuring, calculates the frictional force size between the assembly body and the expansion bolts assembly interface, and then assesses the expansive force of bolt. Through comparing the multiple measurement results of the expansion force of the multiple groups of bolts under different assembling pretightening forces, the linearity, the repeatability and the reliability of the assembling can be determined, and whether the expansion bolts meet the current assembling requirements or not can be comprehensively evaluated.
Drawings
Fig. 1 is a schematic view of a large expansion bolt expansion force testing device provided by the present invention;
fig. 2 is an assembly schematic view of the testing device provided by the present invention;
in the figure: 1-a loading sleeve; 2-fixing the sleeve; 3-torque wrench; 4-a bench vice; 5-torque loading hole; 6-expansion bolt assembly.
Detailed Description
In order to make those skilled in the art better understand the present invention, the technical solutions in the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be apparent that the embodiments described below are only some, but not all embodiments of the present invention. Based on the embodiments recorded in the present invention, all other embodiments obtained by those skilled in the art without creative efforts are all within the scope of the present invention.
As shown in fig. 1, the utility model provides a large-scale expansion bolts expansibility testing arrangement, the device include loading sleeve 1, fixed sleeve 2, torque wrench 3 and bench vice 4, and the laminating of loading sleeve 1 is placed on 2 upper portions of fixed sleeve, and torque wrench 3 vertical fixation is on the surface of loading sleeve 1, and 2 cards of fixed sleeve are in the jaw department of bench vice 4.
The loading sleeve 1 and the fixing sleeve 2 are both cylindrical, and the inner diameters of the central holes of the loading sleeve 1 and the fixing sleeve 2 are the same.
When the testing device is used, the expansion bolt assembly 6 is vertically fixed in the central holes of the loading sleeve 1 and the fixing sleeve 2, and the application of testing torque is facilitated.
The taper bolt of the expansion bolt component 6 is usually processed with a taper angle of 5 degrees to 10 degrees, the large diameter end of the taper bolt is downward when assembling, the outer side of the taper bolt is assembled with the fixed sleeve 2, so the radial expansion force borne by the fixed sleeve 2 is large, in addition, the upper surface and the lower surface of the fixed sleeve 2 are respectively contacted with the loading sleeve 1 and a fastening nut at the bottom of the expansion bolt component 6, and the upper end surface and the lower end surface bear certain pressure; the interior of the loading sleeve 1 is assembled with the taper bolt small-diameter end of the expansion bolt assembly 6, the borne axial expansion force is small, and axial displacement is easy to occur to cause assembly failure. Therefore, the fixed sleeve 2 can provide larger static friction force relative to the loading sleeve 1, and assembly failure is not easy to occur. In summary, in order to evaluate the expansion force of the expansion bolt assembly as a whole, it is more effective to connect the torque wrench 3 to the loading socket 1 having a smaller expansion force.
The surface of the loading sleeve 1 is provided with a torque loading hole 5, and the torque wrench 3 is inserted into the torque loading hole 5 to be connected with the loading sleeve 1.
The test method of the test device comprises the following steps:
assembling a loading sleeve 1, a fixing sleeve 2 and an expansion bolt assembly 6, and applying pretightening force to the expansion bolt assembly 6 to enable the outer side of an expansion taper sleeve of the expansion bolt assembly 6 to be in interference fit with the loading sleeve 1 and the fixing sleeve 2;
step (2) clamping the fixed sleeve 2 at the jaw of the bench vice 4 and locking;
step (3), inserting a torque wrench 3 into a torque loading hole 5 of a loading sleeve 1, and applying a test torque from small to large by a proper difference value until the assembling relation between the loading sleeve 1 and an expansion bolt assembly 6 fails;
and (4) repeating the measurement three times for each pre-tightening force value, recording the torque value for enabling the loading sleeve 1 and the expansion bolt assembly 6 to be invalid, and repeating the test for different expansion bolt assemblies 6.
By utilizing the method for testing the expansion force of the large expansion bolt, aiming at three times of measurement of the pretightening force of the same bolt, the assembly repeatability of an expansion bolt assembly is verified, aiming at the measurement of different pretightening forces, whether the designed pretightening force meets the requirement of actual installation or not is evaluated, and whether the design of the bolt has stability or not is transversely compared.
The present invention has been described in detail with reference to the drawings and examples, but the present invention is not limited to the above examples, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art. The present invention can adopt the prior art for the content which is not described in detail in the present invention.
Claims (6)
1. The utility model provides a large-scale expansion bolts expansibility testing arrangement which characterized in that: the device includes loading sleeve (1), fixed sleeve (2), torque wrench (3) and bench vice (4), and the laminating of loading sleeve (1) is placed on fixed sleeve (2) upper portion, and torque wrench (3) vertical fixation is on the surface of loading sleeve (1), and fixed sleeve (2) card is in the jaw department of bench vice (4).
2. The large expansion bolt expansion force testing device according to claim 1, wherein: the loading sleeve (1) and the fixing sleeve (2) are both cylindrical, and the inner diameters of the central holes of the loading sleeve (1) and the fixing sleeve (2) are the same.
3. The large expansion bolt expansion force testing device according to claim 2, wherein: the surface of the loading sleeve (1) is provided with a torque loading hole (5), and the torque wrench (3) is inserted into the torque loading hole (5) to be connected with the loading sleeve (1).
4. The large expansion bolt expansion force testing device according to claim 3, wherein: the central hole of the fixed sleeve (2) is connected with the large-diameter end of the taper bolt of the expansion bolt component (6).
5. The large expansion bolt expansion force testing device according to claim 4, wherein: the lower end of the fixed sleeve (2) is contacted with a fastening nut at the bottom of the expansion bolt component (6).
6. The large expansion bolt expansion force testing device according to claim 5, wherein: the central hole of the loading sleeve (1) is connected with the taper bolt small-diameter end of the expansion bolt component (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022131893.7U CN212513432U (en) | 2020-09-25 | 2020-09-25 | Large-scale expansion bolt expansion force testing arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022131893.7U CN212513432U (en) | 2020-09-25 | 2020-09-25 | Large-scale expansion bolt expansion force testing arrangement |
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| Publication Number | Publication Date |
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| CN212513432U true CN212513432U (en) | 2021-02-09 |
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| CN202022131893.7U Active CN212513432U (en) | 2020-09-25 | 2020-09-25 | Large-scale expansion bolt expansion force testing arrangement |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112050983A (en) * | 2020-09-25 | 2020-12-08 | 核工业西南物理研究院 | Large expansion bolt expansion force testing device and method |
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2020
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112050983A (en) * | 2020-09-25 | 2020-12-08 | 核工业西南物理研究院 | Large expansion bolt expansion force testing device and method |
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