CN209745723U - rebar reverse bending test device - Google Patents
rebar reverse bending test device Download PDFInfo
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- CN209745723U CN209745723U CN201920533672.7U CN201920533672U CN209745723U CN 209745723 U CN209745723 U CN 209745723U CN 201920533672 U CN201920533672 U CN 201920533672U CN 209745723 U CN209745723 U CN 209745723U
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Abstract
The utility model discloses a reinforcing bar reverse bend test device belongs to the experimental facilities field. The novel bearing device comprises a sliding block, a base and two groups of supporting wheels, wherein the two groups of supporting wheels are symmetrically installed on the base through a rotating shaft, a V-shaped or arc-shaped stress surface is arranged on the sliding block, a limiting rod is arranged on the sliding block, and a limiting switch corresponding to the limiting rod is arranged on the base. The utility model is used for on the clod wash testing machine, the scheme is simple and easy, and low cost can extend original adoption three point contact moreover and bulldoze the function of configuration clod wash testing machine, makes it possess the test ability of reverse bend, and the reverse bend angle can accurate control.
Description
Technical Field
The utility model belongs to a reinforcing bar performance experimental facilities, specifically speaking especially relates to a reinforcing bar reverse bending test device.
Background
The national standard GB/T28900-2012 'steel test method for reinforced concrete' provides two test configurations of reverse bending of reinforcing steel bars, and for a test sample which is bent to 90 degrees, one is to fix the bent core and one edge of the reinforcing steel bar, and to apply reverse force on the other edge to move the test sample by 20 degrees. And the other method adopts a three-point contact configuration, two sides of the test piece are provided with fulcrums, and thrust is applied on a symmetry axis, so that two sides of the steel bar rotate outwards by 10 degrees at the same time, and the effect of bending the whole steel bar by 20 degrees is achieved. At present, the existing cold bending testing machine adopting a three-point contact pushing configuration does not have a reverse bending structural design, a supporting wheel of the cold bending testing machine is cylindrical, the reverse bending needs the supporting wheel to be provided with a v-shaped groove, a stress surface of a sliding block adopts a planar structure, the stress surface is in point contact with a steel bar sample, the steel bar sample is easy to bend when pressurized, potential safety hazards are brought, and therefore the reverse bending testing cannot be carried out. The known tester capable of performing the reverse bending test adopts a first configuration, so that the angle is difficult to control accurately; and the first configuration is difficult to use on a plurality of cold bending testing machines adopting a three-point contact pushing configuration, which causes serious waste of equipment.
SUMMERY OF THE UTILITY MODEL
the utility model aims at providing a reverse bending test device of reinforcing bar to overcome the defect that reverse bending test machine bending angle of reinforcing bar is difficult to accurate control among the prior art.
The utility model discloses an adopt following technical scheme to realize:
Rebar reverse bend test device, including slider, base and two sets of supporting wheels, two sets of supporting wheels are installed on the base through the pivot symmetry, be equipped with V-arrangement or arc stress surface on the slider, be equipped with the gag lever post on the slider, be equipped with the limit switch who corresponds with the gag lever post on the base.
Preferably, the cross section of the V-shaped or arc-shaped force bearing surface is in a V shape which is adducted by 90 degrees.
Preferably, the caulking groove of the supporting wheel is an inward-closed right-angled V-shaped groove.
preferably, the base is provided with a U-shaped groove, and the two groups of supporting wheels are symmetrically arranged in the U-shaped groove through a rotating shaft.
Preferably, the axis of the bottom of the base is provided with a guide groove, and the bottom of the sliding block is movably connected with the guide groove through a key.
Preferably, the base is provided with a screw hole or a welding nut.
preferably, the limiting rod is connected with the sliding block through a locking adjusting mechanism.
Preferably, the locking adjustment mechanism comprises a mounting seat and a locking screw, a through hole is formed in the mounting seat, and the limiting rod penetrates through the through hole to be connected to the mounting seat and is fixedly locked through the locking screw.
Preferably, the limiting rod is marked with length scales corresponding to the bending angle of the steel bar sample.
Compared with the prior art, the beneficial effects of the utility model are that:
The utility model discloses the scheme is simple and easy, low cost can extend original adoption three point contact moreover and bulldoze the function of configuration clod wash testing machine, makes it possess the test ability of reverse bend, and the reverse bend angle can accurate control, and the stress surface on the slider overlooks and is V-arrangement or arc, can offset the potential safety hazard that the flexibility brought, through the original clod wash testing machine of this testing arrangement perfect match of actual measurement, reinforcing bar counter bend reaches the standard requirement.
Drawings
Fig. 1 is a top view of the present invention;
Fig. 2 is a left side view of the present invention;
FIG. 3 is a diagram illustrating the usage status of the present invention;
Fig. 4 is a top view of the base of the present invention;
Fig. 5 is a left side view of the base of the present invention;
Fig. 6 is a top view of the slider of the present invention;
Fig. 7 is a sectional view taken along line a-a of fig. 6.
In the figure: 1. a slider; 2. a base; 3. a support wheel; 4. a rotating shaft; 5. a limiting rod; 6. a limit switch; 7. locking screws; 8. a mounting seat; 9. a steel bar sample; 10. a guide groove; 11. a screw hole; 12. welding a nut; 13. a U-shaped groove; 14. a key; 15. and (4) bearing surfaces.
Detailed Description
the present invention will be further explained with reference to the drawings and examples.
Example 1: as shown in fig. 1 to 5, the reverse bending test device for reinforcing steel bars of the present invention comprises a slider 1, a base 2 and two sets of supporting wheels 3, wherein the two sets of supporting wheels 3 are symmetrically installed on the base 2 through a rotating shaft 4, the two sets of supporting wheels 3 are provided with caulking grooves for fixing a reinforcing steel bar sample 9, and the caulking grooves of the supporting wheels 3 are preferably inward-folded right-angled V-shaped grooves; a limiting rod 5 is fixedly arranged on the sliding block 1, and a limiting switch 6 corresponding to the limiting rod 5 is arranged on the base 2; the base 2 is provided with a U-shaped groove 13, and the two groups of supporting wheels 3 are symmetrically connected in the U-shaped groove 13 of the base 2 through the rotating shaft 4.
As shown in fig. 6 and 7, the slider 1 is provided with a large-angle V-shaped or arc-shaped stress surface 15 in a top view, the cross section of the stress surface 15 is in a V shape of 90 degrees, the original point contact between the stress surface 15 and the steel bar sample 9 is changed into two groups of line contact, and the potential safety hazard caused by the bending of the steel bar sample 9 in the stress application process can be offset. When the whole stress surface 15 is in a V shape and the cross section is in a V shape which is 90 degrees adducted in overlooking, the stress surface 15 consists of 4 planes, and when the whole stress surface 15 is in an arc shape and the cross section is in a V shape which is 90 degrees adducted in overlooking, the stress surface 15 consists of 2 arc surfaces.
The utility model discloses working process: connecting the sliding block 1 with the original testing machine piston rod, placing a steel bar sample 9 into the sliding block 1 and a 90-degree V-shaped groove between two supporting wheels 3, starting the equipment, pushing the oil cylinder forwards to enable the steel bar sample 9 to form a three-point contact state with the device, selecting and installing limiting rods 5 with different lengths according to the bending diameter of the steel bar sample 9, continuously applying thrust until the limiting rods 5 are in contact with the limiting switch 6, if the two sides of the steel bar sample 9 are simultaneously rotated outwards by 10 degrees, changing the angle of the steel bar sample 9 from the original 90 degrees to 110 degrees, completing reverse bending, feeding back a vehicle returning signal to the equipment by the limiting switch 6, returning the oil cylinder to the vehicle, and taking down the steel bar sample 9 to judge.
Example 2: as shown in fig. 4, the central axis of the bottom of the base 2 is provided with a guide groove 10, as shown in fig. 7, the bottom of the slider 1 is provided with a key 14, the bottom of the slider 1 is movably connected with the base 2 through the key 14 and the guide groove 10, and the key 14 of the slider 1 advances along the guide groove 10 under the pushing of power, so that the problem that the accuracy of the bending angle of the steel bar sample 9 is influenced by the deviation of the slider 1 in the advancing process is avoided. Other contents of this embodiment are the same as embodiment 1.
Example 3: as shown in fig. 4, the base 2 is provided with a screw hole 11 or a weld nut 12, and the height of the base 2 is adjusted by using a screw through the screw hole 11 or the weld nut 12 to improve general-purpose performance. Other contents of this embodiment are the same as embodiment 2.
example 4: as shown in fig. 1, 2 and 3, the limiting rod 5 is connected with the sliding block 1 through a locking adjusting mechanism, the locking adjusting mechanism comprises a mounting seat 8 and a locking screw 7, a through hole is formed in the mounting seat 8, the limiting rod 5 penetrates through the through hole to be connected to the mounting seat 8, and is fixedly locked through the locking screw 7; because the length of gag lever post 5 between mount pad 8 and the limit switch 6 has decided the length of 1 stroke of slider, the angle of buckling of reinforcing bar sample 9 has also been decided, consequently can realize adjusting the angle of buckling of reinforcing bar sample 9 through the length of adjusting gag lever post 5 between mount pad 8 and the limit switch 6, can sign length scale on gag lever post 5 simultaneously, and correspond the different angle of buckling of reinforcing bar sample 9 with 5 different length scales of gag lever post, can realize buckling the different angle of reinforcing bar sample 9. The rest of the present embodiment is the same as embodiment 3.
Claims (9)
1. The utility model provides a reverse bending test device of reinforcing bar, includes slider (1), base (2) and two sets of supporting wheel (3), and its characterized in that is installed on base (2) through pivot (4) symmetry in two sets of supporting wheel (3): the novel bearing seat is characterized in that a stress surface (15) which is V-shaped or arc-shaped in overlooking is arranged on the sliding block (1), a limiting rod (5) is arranged on the sliding block (1), and a limiting switch (6) corresponding to the limiting rod (5) is arranged on the base (2).
2. The reverse bar bending test apparatus according to claim 1, wherein: the cross section of the stress surface (15) is in a V shape of 90 degrees adduction.
3. the reverse bar bending test apparatus according to claim 2, wherein: and the two groups of supporting wheels (3) are provided with inward-closing right-angle V-shaped caulking grooves.
4. The reverse bar bending test apparatus according to claim 3, wherein: the base (2) is provided with a U-shaped groove (13), and the two groups of supporting wheels (3) are symmetrically arranged in the U-shaped groove (13) through the rotating shaft (4).
5. The reverse bar bending test apparatus according to claim 4, wherein: the base (2) bottom axis is equipped with guide way (10), slider (1) bottom is through key (14) and guide way (10) and base (2) swing joint.
6. The reverse bar bending test apparatus according to claim 5, wherein: and a screw hole (11) or a welding nut (12) is arranged on the base (2).
7. The reverse bending test apparatus for reinforcing bar according to any one of claims 1 to 6, wherein: the limiting rod (5) is connected with the sliding block (1) through a locking adjusting mechanism.
8. The reverse bar bending test apparatus according to claim 7, wherein: locking adjustment mechanism includes mount pad (8) and locking screw (7), be equipped with the through-hole on mount pad (8), gag lever post (5) pass the through-hole and connect on mount pad (8) to fix locking through locking screw (7).
9. the reverse bar bending test apparatus according to claim 8, wherein: the limiting rod (5) is marked with length scales corresponding to bending angles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920533672.7U CN209745723U (en) | 2019-04-18 | 2019-04-18 | rebar reverse bending test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920533672.7U CN209745723U (en) | 2019-04-18 | 2019-04-18 | rebar reverse bending test device |
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| Publication Number | Publication Date |
|---|---|
| CN209745723U true CN209745723U (en) | 2019-12-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920533672.7U Active CN209745723U (en) | 2019-04-18 | 2019-04-18 | rebar reverse bending test device |
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| CN (1) | CN209745723U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113049401A (en) * | 2021-02-19 | 2021-06-29 | 南通天和建设工程质量检测有限公司 | Full-automatic reverse bending test device for reinforcing steel bars |
| CN113466026A (en) * | 2021-05-19 | 2021-10-01 | 福建省建研工程检测有限公司 | Reinforcing steel bar reverse bending test fixture and test method of support roller type bending test machine |
| CN116660055A (en) * | 2023-06-02 | 2023-08-29 | 南京航空航天大学 | Four-point bending loading test device suitable for main cargo compartment door lock hook structure |
-
2019
- 2019-04-18 CN CN201920533672.7U patent/CN209745723U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113049401A (en) * | 2021-02-19 | 2021-06-29 | 南通天和建设工程质量检测有限公司 | Full-automatic reverse bending test device for reinforcing steel bars |
| CN113049401B (en) * | 2021-02-19 | 2023-01-13 | 南通天和建设工程质量检测有限公司 | Full-automatic reverse bending test device for reinforcing steel bars |
| CN113466026A (en) * | 2021-05-19 | 2021-10-01 | 福建省建研工程检测有限公司 | Reinforcing steel bar reverse bending test fixture and test method of support roller type bending test machine |
| CN116660055A (en) * | 2023-06-02 | 2023-08-29 | 南京航空航天大学 | Four-point bending loading test device suitable for main cargo compartment door lock hook structure |
| CN116660055B (en) * | 2023-06-02 | 2023-11-03 | 南京航空航天大学 | Four-point bending loading test device suitable for main cargo compartment door lock hook structure |
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