CN210953204U - Bolt pretightening force test and fatigue test device - Google Patents
Bolt pretightening force test and fatigue test device Download PDFInfo
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- CN210953204U CN210953204U CN201922379757.7U CN201922379757U CN210953204U CN 210953204 U CN210953204 U CN 210953204U CN 201922379757 U CN201922379757 U CN 201922379757U CN 210953204 U CN210953204 U CN 210953204U
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Abstract
The utility model discloses a bolt pretightening force test and fatigue test device, which comprises a base, a turntable, a test bolt, a connecting frame and an ear plate seat; the bottom of the base is connected with the foundation, a connecting frame is fastened on the base through a test bolt, an ear plate seat is installed on the connecting frame, and the upper part of the ear plate seat is connected with a tensile machine; a rotary table is installed between the base and the connecting frame, a pressure sensor used for testing the pretightening force of the test bolt is installed in the rotary table, and the pressure sensor is connected with an external display device. The utility model discloses a bolt pretightning force test and fatigue test device are integrated in an organic whole with pretightning force test and fatigue test. The bolt pretightening force can be obtained in a mode of not sticking a strain gauge, and the bolt pretightening force can be repeatedly used.
Description
Technical Field
The utility model relates to a bolt pretightning force test and fatigue test device.
Background
The high-strength bolt needs to be pre-tightened when in use, and the pre-tightening torque and the pre-tightening force of the bolt have a certain corresponding relation and are greatly influenced by the thread specification, the processing roughness, the lubrication degree, the surface treatment mode and the like when the bolt is fastened. If the relation between the bolt pretightening force and the pretightening torque needs to be accurately obtained, special tests and researches are needed.
Generally, high-strength bolts can only be used for 1-2 times, and along with the diversification of market demands, high-strength bolts which can be frequently used need to be developed, so that a device for a fatigue test of the high-strength bolts needs to be designed.
At present, when the pretightening force of a bolt is measured, a mode of pasting a strain gauge on a screw rod body is needed. The bolts are troublesome to attach the strain gauges, and each bolt to be tested is required to be attached with the strain gauge, so that the workload is large.
Disclosure of Invention
Problem to above-mentioned prior art exists, the utility model provides a bolt pretightning force test and fatigue test device obtains the bolt pretightning force through the mode that does not paste the foil gage, repeatedly usable.
In order to achieve the purpose, the bolt pretightening force testing and fatigue testing device adopted by the utility model comprises a base, a turntable, a testing bolt, a connecting frame and an ear plate seat;
the bottom of the base is connected with the foundation, a connecting frame is fastened on the base through a test bolt, an ear plate seat is installed on the connecting frame, and the upper part of the ear plate seat is connected with a tensile machine;
a rotary table is installed between the base and the connecting frame, a pressure sensor used for testing the pretightening force of the test bolt is installed in the rotary table, and the pressure sensor is connected with an external display device.
Preferably, three sensor grooves are formed in the rotary disc, and three pressure sensors are arranged in the sensor grooves and are uniformly distributed around the test bolt at 120 degrees.
Preferably, a groove is formed in the outer side wall of the rotating disc.
Preferably, the bottom of the base is connected with a frame on the ground through foundation bolts.
Preferably, the middle part of the connecting frame is provided with a torque wrench for fastening the test bolt and an upright post for providing a fulcrum for the torque wrench.
Preferably, the upper part of the connecting frame is provided with an ear plate.
Preferably, the upper part of the lug plate seat is connected with a tensile machine through a flange bolt, the lower part of the lug plate seat is provided with a lower lug plate, and the lower lug plate is connected with the connecting frame through a pin shaft.
Preferably, the lower ear plate of the ear plate seat is provided with a long hole.
Compared with the prior art, the utility model discloses a bolt pretightning force test and fatigue test device, with pretightning force test and fatigue test integration in an organic whole, the accessible does not paste the mode of foil gage and obtains the bolt pretightning force, repeatedly usable.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of the middle ear plate seat of the present invention;
FIG. 3 is a schematic view of the connection structure of the base and the turntable according to the present invention;
in the figure: 1. foundation bolt, 2, base, 3, carousel, 4, pressure sensor, 5, test bolt, 6, link, 7, round pin axle, 8, otic placode seat, 9, flange bolt, 10, lower otic placode, 11, slot hole, 12, sensor groove, 13, recess.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below. It should be understood, however, that the description herein of specific embodiments is only intended to illustrate the invention and not to limit the scope of the invention.
As shown in fig. 1, 2 and 3, a bolt pretightening force testing and fatigue testing device comprises a base 2, a turntable 3, a testing bolt 5, a connecting frame 6 and an ear plate seat 8;
the bottom of the base 2 is connected with a foundation, a connecting frame 6 is fastened on the base 2 through a test bolt 5, an ear plate seat 8 is mounted on the connecting frame 6, and the upper part of the ear plate seat 8 is connected with a tensile machine;
install carousel 3 between base 2 and link 6, install pressure sensor 4 that is used for testing 5 pretightning forces of test bolt in the carousel 3, pressure sensor 4 is connected with outside display device.
In a preferred embodiment, three sensor grooves 12 are formed in the rotary table 3, and three pressure sensors 4 are arranged in the sensor grooves 12 and are uniformly distributed around the test bolt 5 at 120 degrees. After the test bolt 5 is pre-tightened, pressure generated between the connecting frame 6 and the base 2 is borne by the pressure sensor 4, and the pre-tightening force of the test bolt 5 can be obtained; the pressure is displayed by an external display device (e.g., a display screen, etc.). Three pressure sensor 4 is 120 equipartitions around test bolt 5, measures more accurately, eliminates the influence of unbalance loading, when pressure sensor 4 atress is uneven, and accessible carousel 3 is adjusted.
As a preferred embodiment, a groove 13 is formed on the outer side wall of the turntable 3, so that routing of data lines is facilitated.
As a preferred embodiment, the bottom of the base 2 is connected with a frame on the ground through foundation bolts 1, so that high stability is ensured, and the use requirement is effectively met.
In a preferred embodiment, a torque wrench for fastening the test bolt 5 and a column for providing a fulcrum for the torque wrench are arranged in the middle of the connecting frame 6, and an ear plate is arranged on the upper portion of the connecting frame 6. The lower part of the connecting frame 6 is provided with a test bolt 5, the middle part is convenient for a torque wrench to apply force, and the upper part is provided with an ear plate which applies pulling force on the ear plate so as to transmit the pulling force to the test bolt 5.
In a preferred embodiment, the upper part of the lug plate seat 8 is connected with a tensile machine through a flange bolt 9, the lower part of the lug plate seat 8 is provided with a lower lug plate 10, the lower lug plate 10 is connected with the connecting frame 6 through a pin shaft 7, and the pin shaft 7 is used for connection and force transmission. And a long hole 11 is formed in a lower lug plate 10 of the lug plate seat 8 and used for unloading the pin shaft 7, so that the disassembly is convenient, namely when the application of the pulling force is finished, the pulling force machine can move in the opposite direction to enable the pin shaft 7 to fall into a gap of the long hole 11 of the lug plate seat 8 and not to be stressed any more.
When the bolt pretightening force is tested, after the test bolt 5 is pretightened, pressure generated between the connecting frame 6 and the base 2 is born by the pressure sensor 4, and the pretightening force of the test bolt 5 can be obtained; the pressure is displayed by an external display device (e.g., a display screen, etc.).
When the fatigue test is carried out, a pulling force machine applies pulsating pulling force with a certain frequency to the ear plate seat 8, and when the pulling force machine pulls up the ear plate seat 8, the pulling force is transmitted to the connecting frame 6 through the pin shaft 7, so that pulling force is generated on the test bolt 5; the lower ear plate 10 of the ear plate seat 8 is provided with a long hole 11 for unloading the pin shaft 7, namely when the application of the pulling force is finished, the pulling force machine can move in the opposite direction to enable the pin shaft 7 to fall into the gap of the long hole 11 of the ear plate seat 8 and not to be stressed any more.
The utility model discloses a bolt pretightning force test and fatigue test device are integrated in an organic whole with pretightning force test and fatigue test. The bolt pretightening force can be obtained in a mode of not sticking a strain gauge, and the bolt pretightening force can be repeatedly used.
The above description is only exemplary of the invention, and should not be taken as limiting the invention, as any modification, equivalent replacement or improvement made within the spirit and principle of the invention should be included in the scope of the invention.
Claims (8)
1. A bolt pretightening force test and fatigue test device is characterized by comprising a base (2), a turntable (3), a test bolt (5), a connecting frame (6) and an ear plate seat (8);
the bottom of the base (2) is connected with a foundation, a connecting frame (6) is fastened on the base (2) through a test bolt (5), an ear plate seat (8) is mounted on the connecting frame (6), and the upper portion of the ear plate seat (8) is connected with a tensile machine;
install carousel (3) between base (2) and link (6), install pressure sensor (4) that are used for test bolt (5) pretightning force in carousel (3), pressure sensor (4) are connected with outside display device.
2. The bolt pretightening force test and fatigue test device according to claim 1, wherein three sensor grooves (12) are arranged in the rotary table (3), and the three pressure sensors (4) are arranged in the sensor grooves (12) and are uniformly distributed around the test bolts (5) at 120 degrees.
3. The bolt pretightening force test and fatigue test device according to claim 2, wherein a groove (13) is formed on the outer side wall of the rotary table (3).
4. The bolt pretightening force test and fatigue test device according to claim 1, wherein the bottom of the base (2) is connected with a frame on the ground through a foundation bolt (1).
5. The bolt pretightening force test and fatigue test device according to claim 1, wherein a torque wrench for fastening the test bolt (5) and a column for providing a fulcrum for the torque wrench are arranged in the middle of the connecting frame (6).
6. The bolt pretightening force test and fatigue test device according to claim 1 or 5, wherein an ear plate is arranged at the upper part of the connecting frame (6).
7. The bolt pretightening force test and fatigue test device according to claim 1, wherein the upper part of the lug plate seat (8) is connected with a tensile machine through a flange bolt (9), the lower part of the lug plate seat (8) is provided with a lower lug plate (10), and the lower lug plate (10) is connected with the connecting frame (6) through a pin shaft (7).
8. The bolt pretightening force test and fatigue test device according to claim 7, wherein a long hole (11) is formed in the lower ear plate (10) of the ear plate seat (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922379757.7U CN210953204U (en) | 2019-12-26 | 2019-12-26 | Bolt pretightening force test and fatigue test device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922379757.7U CN210953204U (en) | 2019-12-26 | 2019-12-26 | Bolt pretightening force test and fatigue test device |
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| CN210953204U true CN210953204U (en) | 2020-07-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110873620A (en) * | 2019-12-26 | 2020-03-10 | 徐州建机工程机械有限公司 | Bolt pretightening force test and fatigue test device |
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- 2019-12-26 CN CN201922379757.7U patent/CN210953204U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110873620A (en) * | 2019-12-26 | 2020-03-10 | 徐州建机工程机械有限公司 | Bolt pretightening force test and fatigue test device |
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