CN214472434U - Test device for measuring reverse bending performance of reinforcing steel bar - Google Patents
Test device for measuring reverse bending performance of reinforcing steel bar Download PDFInfo
- Publication number
- CN214472434U CN214472434U CN202120338577.9U CN202120338577U CN214472434U CN 214472434 U CN214472434 U CN 214472434U CN 202120338577 U CN202120338577 U CN 202120338577U CN 214472434 U CN214472434 U CN 214472434U
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- reverse bending
- supporting seat
- measuring
- arc
- steel bar
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- 238000005452 bending Methods 0.000 title claims abstract description 69
- 238000012360 testing method Methods 0.000 title claims abstract description 40
- 229910001294 Reinforcing steel Inorganic materials 0.000 title abstract description 16
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 15
- 230000007246 mechanism Effects 0.000 claims abstract description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 22
- 239000010959 steel Substances 0.000 claims description 22
- 210000002421 cell wall Anatomy 0.000 claims description 6
- 238000011056 performance test Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000001514 detection method Methods 0.000 abstract description 3
- 238000013461 design Methods 0.000 abstract description 2
- 238000012545 processing Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract 1
- 239000000463 material Substances 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000011150 reinforced concrete Substances 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 229910000677 High-carbon steel Inorganic materials 0.000 description 1
- 229910001315 Tool steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model discloses a test device for measuring the reverse bending performance of a reinforcing steel bar, which comprises a supporting mechanism and a reverse bending part, wherein the supporting mechanism comprises a supporting seat and a plurality of central guide rods and guide pulleys which are arranged on the supporting seat; two ends of the central guide rod respectively penetrate through the groove wall of the supporting seat through the through hole; a guide pulley is sleeved on the central guide rod; the supporting seat is provided with a plurality of arc measuring scales with arc tracks arranged in the middle and a track shaft for fixing and supporting the arc measuring scales; the reverse bending piece is of a cylinder structure, and the lower end of the reverse bending piece is provided with a reverse V-shaped groove. Compared with the prior art, technical scheme of the utility model, structural design is reasonable, and the cost of manufacture is low, and the production and processing of being convenient for utilizes the structure self fulcrum and guide effect carry out the reverse bending test of different specification reinforcing bars to reach quick, accurate measuring purpose, guaranteed reinforcing bar reverse bending performance detection data's accuracy.
Description
Technical Field
The utility model relates to a capability test field especially relates to a be used for measuring reinforcing bar reverse bending performance test device.
Background
According to GB/T1499.2-2018 Steel for reinforced concrete part 2: hot rolled ribbed bar "standard requirements: "reverse bending test should be performed on the steel bar with the mark E".
Reverse bending test: the sample is bent at 90 degrees in the forward direction, the sample after being bent at the forward direction is insulated at the temperature of 100 +/-10 ℃ for not less than 30min, and is bent in the reverse direction after being naturally cooled, and the measurement is carried out when the two bending angles are kept under load. When the supply side can ensure the reverse bending performance of the steel bar after artificial aging, the sample after the forward bending can be directly subjected to reverse bending at room temperature. The steel bar with the number E should be subjected to a reverse bending test. After the reverse bending test, cracks cannot be generated on the surface of the bent part of the steel bar.
The bending test is mainly used for measuring the bending strength of brittle and low-plastic materials (such as cast iron, high-carbon steel, tool steel and the like) and can reflect the deflection of a plastic index. And the steel bar is tested for its ability to withstand deformation to a specified degree of bending by bending tests to determine its plasticity and workability, and to indicate its defects. Steel for reinforced concrete part 2: the reverse bending performance test of the steel bar is used as an important detection index of the brand number E steel bar in the GB/T1499.2-2018 standard of the hot-rolled ribbed steel bar. Therefore, the analysis of the influence factors of the reverse bending test of the reinforcing steel bars under the background has strong practical significance.
However, at present, the original universal testing machine cannot meet the test requirement of the reverse bending performance in the standard, and the angle of the reverse bending of the reinforcing steel bar cannot be accurately measured. Therefore, a device which can perform reverse bending tests on reinforcing steel bars with different specifications and accurately measure the reverse bending angle of the reinforcing steel bars is needed.
SUMMERY OF THE UTILITY MODEL
To the problem, the utility model provides a be used for measuring reinforcing bar reverse bending performance test device.
The technical scheme adopted for solving the technical problem is as follows:
a test device for measuring the reverse bending performance of a reinforcing steel bar comprises a supporting mechanism and a reverse bending piece,
the supporting mechanism comprises a supporting seat and a plurality of central guide rods and guide pulleys which are arranged on the supporting seat; the supporting seat is of a U-shaped groove structure and consists of a groove bottom and a groove wall, a plurality of through holes are formed in the groove wall, and a bolt fixing groove is formed in the groove bottom; the two ends of the central guide rod are provided with external threads, the two ends of the central guide rod penetrate through the groove wall of the supporting seat through holes respectively, and the central guide rod is fixed on the supporting seat by a fixing nut matched with the central guide rod; the central guide rod is sleeved with a guide pulley, and the guide pulley is positioned in a U-shaped groove of the supporting seat; a plurality of arc measuring scales are arranged on the supporting seat, and arc tracks are arranged on the surfaces of the arc measuring scales; the support seat is also provided with a track shaft for supporting the arc measuring scale to move, the track shaft is provided with external threads, and the arc measuring scale is fixed on the support seat through a fixing nut matched with the track shaft;
the reverse bending piece is of a cylinder structure, and the lower end of the reverse bending piece is provided with a reverse V-shaped groove; the upper surface of the reverse bending piece is also provided with a T-shaped fixing table.
Further, the cross section of the bolt fixing groove is of a T-shaped structure.
Furthermore, the through holes are respectively arranged on the groove walls of the front side and the rear side of the supporting seat, the number of the through holes on the groove walls of the front side and the rear side is the same, and the through holes are symmetrical in position.
Furthermore, the fixing nut for fixing the central guide rod is positioned on the outer surface of the groove wall of the supporting seat.
Furthermore, the number of the central guide rods is more than two, and the number of the guide pulleys corresponds to that of the central guide rods.
Furthermore, the guide pulley is of a cylinder structure with a thin middle part and thick two ends.
Further, arc dipperstick and track axle all set up in the surface of both sides cell wall around the supporting seat.
Further, the arc dipperstick can move on the track axle, and when the reverse bending test of reinforcing bar began, stretch out the arc dipperstick, when the experiment ended, again with the arc dipperstick withdrawal.
Further, the angle of the reverse V-shaped groove is set to be 90 degrees.
Further, the utility model discloses need to cooperate universal tester to use, the reverse bending spare passes through the bolt fastening on universal tester.
Compared with the prior art, the technical scheme of the utility model has reasonable structural design, low manufacturing cost and convenient production and processing, and the fulcrum and the guiding action of the structure of the utility model are utilized to carry out the reverse bending test of the reinforcing steel bars with different specifications, thereby achieving the purpose of rapid and accurate measurement and ensuring the accuracy of the detection data of the reverse bending performance of the reinforcing steel bars;
by arranging the arc-shaped measuring scale with the arc-shaped track, the arc-shaped measuring scale can move on the track shaft, the arc-shaped measuring scale is extended when the reverse bending test of the steel bar is started, and the arc-shaped measuring scale is retracted when the test is finished, so that the purpose of free extension and retraction of the measuring scale can be realized, and the bending angle of the steel bar can be accurately controlled in the test process;
through setting up thin, the thick guide pulley in both ends in the middle of, universal tester drives and installs the backward bending spare downstream on its crossbeam, and the reinforcing bar is placed in guide pulley's centre this moment, and when having prevented the backward bending reinforcing bar, the reinforcing bar takes place to remove or the phenomenon of dislocation on guide pulley.
Drawings
The invention will be further described with reference to the accompanying drawings and specific embodiments,
fig. 1 is an extension schematic view of the arc measuring scale of the utility model;
fig. 2 is a drawing of the arc measuring scale of the present invention;
FIG. 3 is a schematic side view of the support base of the present invention;
FIG. 4 is a top view of the support base of the present invention;
FIG. 5 is a schematic front view of the reverse bending member of the present invention;
FIG. 6 is a top view of the reverse bend of the present invention;
fig. 7 is a bottom view of the reverse bend of the present invention;
wherein: 1. a supporting seat; 2. a center guide bar; 3. a guide pulley; 4. an arc measuring scale; 5. a rail shaft; 6. a bolt fixing groove; 7. a reverse bend; 8. a reverse V-shaped groove; 9. and a fixed platform.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
In the present invention, unless otherwise expressly stated or limited, the terms "disposed," "mounted," "connected," and "fixed" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; may be a mechanical connection; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
The utility model discloses need to cooperate universal tester to use.
The universal tester is a material tester integrating the functions of stretching, bending, compressing, shearing and the like, and is mainly used for mechanical property tests of metal and nonmetal materials. The universal testing machine comprises a host machine, a force measuring system and a hydraulic system, wherein the host machine comprises a base, a workbench, an upright post, a screw rod, a movable cross beam and an upper cross beam.
As shown in fig. 1, 2, 3, 4, 5, 6 and 7, a test device for measuring reverse bending performance of a steel bar comprises a supporting mechanism and a reverse bending member 7,
the supporting mechanism comprises a supporting seat 1 and a plurality of central guide rods 2 and guide pulleys 3 which are arranged on the supporting seat; the supporting seat 1 is of a U-shaped groove structure and consists of a groove bottom and a groove wall, a plurality of through holes are formed in the groove wall, and a bolt fixing groove 6 is formed in the groove bottom; the two ends of the central guide rod 2 are both provided with external threads, the two ends of the central guide rod respectively penetrate through the groove wall of the supporting seat 1 through holes, and the central guide rod is fixed on the supporting seat by a fixing nut matched with the central guide rod; the central guide rod 2 is sleeved with a guide pulley 3, and the guide pulley 3 is positioned in a U-shaped groove of the supporting seat 1; a plurality of arc measuring scales 4 are arranged on the supporting seat 1, and arc tracks are arranged on the surfaces of the arc measuring scales 4; the supporting seat 1 is also provided with a track shaft 5 for supporting the arc-shaped measuring scale 4 to move, the track shaft 5 is provided with external threads, and the arc-shaped measuring scale 4 is fixed on the supporting seat 1 through a fixing nut matched with the track shaft 5;
the reverse bending piece 7 is of a cylinder structure, and the lower end of the reverse bending piece is provided with a reverse V-shaped groove 8; the upper surface of the reverse bend 7 is also provided with a T-shaped fixing table 9.
The embodiment of the utility model provides an in, reverse bending spare 7 is fixed in universal tester walking beam's lower surface.
The utility model discloses an in the embodiment, the cross section of bolt fixed slot 6 is T type structure, and supporting mechanism is fixed in on universal tester's the workstation by the bolt through the bolt fixed slot 6 that sets up above that.
The utility model discloses an in the embodiment, the through-hole is seted up respectively on the cell wall of both sides around the supporting seat 1, and the through-hole quantity homogeneous phase on the cell wall of both sides around and, its position homogeneous phase.
The embodiment of the utility model provides an in, fixation nut of fixed center guide arm 2 is located 1 cell wall surface of supporting seat.
The embodiment of the utility model provides an in, the quantity of center guide arm 2 sets up to two, and the quantity of leading pulley 3 is rather than corresponding, and the quantity of leading pulley is two also promptly.
The embodiment of the utility model provides an in, leading pulley 3 is middle thin, the thick cylinder structure in both ends, and universal tester drives and installs 7 downstream of the recurvation piece on its travelling beam, and the reinforcing bar is placed in leading pulley 3's centre this moment, and when having prevented the recurvation reinforcing bar, the reinforcing bar takes place to remove or the phenomenon of dislocation on leading pulley 3.
The embodiment of the utility model provides an in, arc dipperstick 4 and track axle 5 all set up in the surface of the both sides cell wall around the supporting seat 1, as shown in fig. 1, 2, are provided with an arc dipperstick 4 and a track axle 5 respectively at 1 front end of supporting seat and rear end, and 1 front side left end of supporting seat sets up portable arc dipperstick 4 that sets up on track axle 5 and the track axle 5 promptly, and 1 rear side right-hand member of supporting seat sets up portable arc dipperstick 4 that sets up on track axle 5 and the track axle 5 equally.
The embodiment of the utility model provides an in, arc dipperstick 4 can move on track axle 5, and when the reinforcing bar bending test began, stretches out arc dipperstick 4, when the experiment ended, retracts arc dipperstick 4 again.
In the embodiment of the utility model, the angle setting of reverse V type groove 8 is 90 degrees.
The theory of operation of structure does:
in conducting a test for measuring the reverse bending property of the reinforcing bar, the reinforcing bar which has been bent in the forward direction by an angle of 90 ° is first placed vertically, i.e., by an angle of 90 ° directed downward, in the middle of the guide pulley 3. Then, adjusting a movable cross beam of the universal testing machine to enable the groove wall of the reverse V-shaped groove 8 of the reverse bending piece 7 mounted on the movable cross beam to be fully contacted with the surface of the bending angle of the steel bar bent at the angle of 90 degrees in the forward bending mode, wherein the steel bar bent at the angle of 90 degrees in the forward bending mode is positioned between the supporting mechanism and the reverse bending piece 7; after the reinforcing steel bar which is positively bent by 90 degrees is installed, extending out of the arc measuring scale 4 and adjusting the extending length of the arc measuring scale 4 to enable the positions of 0 degree on the arc measuring scale 4 to correspond to the positions of two sides of the reinforcing steel bar which is positively bent by 90 degrees, then starting the universal testing machine, adjusting the speed of the universal testing machine and starting a bending performance measuring test; the movable cross beam of the universal testing machine moves downwards to reversely bend the reinforcing steel bar which is bent forwards, when the reinforcing steel bar which is bent forwards is bent backwards to reach a specified angle, the testing equipment is stopped accurately, at the moment, the reinforcing steel bar is taken down to be carefully observed, whether courseware cracks appear in the reinforcing steel bar is determined through visual observation, and finally, the test for measuring the reverse bending performance is completed.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.
Claims (8)
1. The utility model provides a be used for measuring reinforcing bar reverse bending performance test device which characterized in that: comprises a supporting mechanism and a reverse bending piece,
the supporting mechanism comprises a supporting seat and a plurality of central guide rods and guide pulleys which are arranged on the supporting seat; the supporting seat is of a U-shaped groove structure and consists of a groove bottom and a groove wall, a plurality of through holes are formed in the groove wall, and a bolt fixing groove is formed in the groove bottom; the two ends of the central guide rod are provided with external threads, the two ends of the central guide rod penetrate through the groove wall of the supporting seat through holes respectively, and the central guide rod is fixed on the supporting seat by a fixing nut matched with the central guide rod; the central guide rod is sleeved with a guide pulley, and the guide pulley is positioned in a U-shaped groove of the supporting seat; a plurality of arc measuring scales are arranged on the supporting seat, and arc tracks are arranged on the surfaces of the arc measuring scales; the support seat is also provided with a track shaft for supporting the arc measuring scale to move, the track shaft is provided with external threads, and the arc measuring scale is fixed on the support seat through a fixing nut matched with the track shaft;
the reverse bending piece is of a cylinder structure, and the lower end of the reverse bending piece is provided with a reverse V-shaped groove; the upper surface of the reverse bending piece is also provided with a T-shaped fixing table.
2. The test device for measuring the reverse bending performance of the steel bar according to claim 1, wherein: the cross section of the bolt fixing groove is of a T-shaped structure.
3. The test device for measuring the reverse bending performance of the steel bar according to claim 1, wherein: the through holes are respectively arranged on the groove walls of the front side and the rear side of the supporting seat, the number of the through holes on the groove walls of the front side and the rear side is the same, and the through holes are symmetrical in position.
4. The test device for measuring the reverse bending performance of the steel bar according to claim 1, wherein: and the fixing nut for fixing the central guide rod is positioned on the outer surface of the groove wall of the supporting seat.
5. The test device for measuring the reverse bending performance of the steel bar according to claim 1, wherein: the number of the central guide rods is more than two, and the number of the guide pulleys corresponds to that of the central guide rods.
6. The test device for measuring the reverse bending performance of the steel bar according to claim 1, wherein: the guide pulley is of a cylinder structure with a thin middle part and thick two ends.
7. The test device for measuring the reverse bending performance of the steel bar according to claim 1, wherein: arc dipperstick and track axle all set up in the surface of both sides cell wall around the supporting seat.
8. The test device for measuring the reverse bending performance of the steel bar according to claim 1, wherein: the angle of the reverse V-shaped groove is set to be 90 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120338577.9U CN214472434U (en) | 2021-02-07 | 2021-02-07 | Test device for measuring reverse bending performance of reinforcing steel bar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120338577.9U CN214472434U (en) | 2021-02-07 | 2021-02-07 | Test device for measuring reverse bending performance of reinforcing steel bar |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214472434U true CN214472434U (en) | 2021-10-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120338577.9U Expired - Fee Related CN214472434U (en) | 2021-02-07 | 2021-02-07 | Test device for measuring reverse bending performance of reinforcing steel bar |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214472434U (en) |
-
2021
- 2021-02-07 CN CN202120338577.9U patent/CN214472434U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20211022 |