CN210487471U - A spiral shell reverse bending device for steel bar bending test - Google Patents
A spiral shell reverse bending device for steel bar bending test Download PDFInfo
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- CN210487471U CN210487471U CN201921102571.0U CN201921102571U CN210487471U CN 210487471 U CN210487471 U CN 210487471U CN 201921102571 U CN201921102571 U CN 201921102571U CN 210487471 U CN210487471 U CN 210487471U
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- pressure head
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- spiral shell
- steel bar
- bending
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Abstract
The utility model discloses a spiral shell recurvation device for steel bar bending test, it includes pressure head, base and two V type bearing rollers, the upper portion of going up the pressure head is passed through the connecting rod and is connected with the entablature of pulling machine, goes up the lower terminal surface of pressure head and is equipped with the middle assorted draw-in groove of buckling of the 90 reinforcing bar sample of bending with the forward, the base is located the pressure head under, and the lower part of base is passed through the locating pin and is connected with the bottom end rail of pulling machine, and the height of two bearing rollers is the same, and the bearing is passed through in the pivot of the two and the base rotates to be connected, and the V type draw-in groove on the roll surface of two bearing rollers is corresponding with the straight arm in both. The utility model discloses use with the necessary pulling force machine cooperation in laboratory, can accomplish the reverse bending test of spiral shell high-efficiently, accurately, avoid the reinforcing bar sample to appear phenomenons such as "S" is bent, the curved core of increase. The device well solves the problem of reverse bending of the spiral shell and does not need to increase equipment investment, thereby reducing the inspection cost of the spiral shell.
Description
Technical Field
The utility model relates to a reverse bending device that uses when carrying out bending test to spiral shell belongs to test technical field.
Background
The steel reinforcement is mainly subjected to tensile stress in the concrete. The deformed reinforcing steel bar has larger bonding capacity with concrete due to the action of the ribs, so that the deformed reinforcing steel bar can better bear the action of external force. Steel reinforcement is widely used in various building structures, especially large, heavy, light thin-walled and high-rise building structures. Therefore, the mechanical detection of the steel bars becomes a main means for the quality inspection of the steel bars. In particular GB/T1499.2-2018 Steel for reinforced concrete part 2: hot rolled ribbed bar "added" the test requirement for reverse bending the bar of brand number band E as a routine test item "compared to the previous version. Because the existing 40 bending machine and 50 bending machine are designed according to the original test requirements and do not have the reverse bending function, when the bending machines are used for reversely bending a wire rod-shaped steel bar, namely a spiral, the steel bar sample has the phenomena of S bending, core bending increase and the like, and the test requirements cannot be met. If a bend/reverse bend tester is designed to meet the test requirements, not only is the equipment investment increased, but sufficient installation space is required for a mature laboratory. Therefore, how to solve the problem of reverse bending of the spiral by using the existing laboratory equipment becomes a problem faced by the related technical personnel.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a spiral shell bending apparatus for steel bar bending test to the drawback of prior art, under the prerequisite that does not increase equipment input, solve the bending problem of spiral shell, reduce the inspection cost of spiral shell.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a spiral shell of dish reverse bending device for reinforcing bar bending test, includes pressure head, base and two V type bearing rollers in the constitution, the upper portion of going up the pressure head is connected through the connecting rod with the entablature that has the pulling machine that presses to the function, is equipped with the draw-in groove with the middle department of buckling of the 90 reinforcing bar samples of forward bending on the lower terminal surface of going up the pressure head, the base is located under the pressure head, and the lower part of base is passed through the locating pin and is connected with the bottom end rail of pulling machine, and the height of two bearing rollers is the same, and the pivot of the two is parallel to each other and is connected with the base rotation through the bearing, and the V type draw-in groove on the roll surface of two bearing.
Above-mentioned a spiral shell reverse bending device for bending test of reinforcing bar, the draw-in groove on the terminal surface is V type groove under the upper pressure head, and two V type bearing rollers are arranged and are located the V type groove under along the length direction in V type groove.
According to the disc screw reverse bending device for the steel bar bending test, the two positioning pins at the lower part of the base are respectively embedded into the two positioning holes in the lower cross beam of the tensile machine.
The utility model discloses use with the necessary pulling force machine cooperation in laboratory, can accomplish the reverse bending test of spiral shell high-efficiently, accurately, avoid the reinforcing bar sample to appear phenomenons such as "S" is bent, the curved core of increase. The device well solves the problem of reverse bending of the spiral shell and does not need to increase equipment investment, thereby reducing the inspection cost of the spiral shell.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a left side view of FIG. 1;
fig. 3 is a schematic view of the clamping of a steel bar sample.
The reference numbers in the figures are as follows: 1. go up pressure head, 2, connecting rod, 3, pivot, 4, base, 5, locating pin, 6, bearing roller, 7, reinforcing bar sample.
Detailed Description
The utility model provides a spiral shell bending apparatus for steel bar bending test, the device can avoid utilizing 40 bending machines and 50 bending machines to easily appear "S" curved or increase the problem of the curved core when experimenting, improves spiral shell bending' S rate of accuracy.
Refer to fig. 1, fig. 2 and fig. 3, the utility model discloses mainly include pressure head 1, connecting rod 2, base 4, locating pin 5 and bearing roller 6, it is to go up pressure head 1 and base 4 the utility model discloses the position that is connected with the pulling force machine crossbeam, base 4 relies on the bottom end rail fixed connection of locating pin 5 and pulling force machine, it passes through connecting rod 2 and the entablature fixed connection of pulling force machine to go up pressure head 1, pivot 3 of two bearing rollers 6 is connected with base 4 through antifriction bearing, go up the draw-in groove on the pressure head 1 lower surface and be used for the summit of 7 middle parts of fixed steel bar sample buckling department, V type groove on the roll surface of two bearing rollers 6 is used for the straight arm in 7 both ends of fixed steel bar sample, ensure that the sample does not skid, prevent that steel bar sample 7 from taking place the slope in the reverse bending process, and. The bending part of the steel bar sample 7 which is bent by 90 degrees in the forward direction is placed into the clamping groove of the upper pressure head 1, the straight arms at two ends of the steel bar sample 7 are respectively placed into the V-shaped grooves on the roller surfaces of the two carrier rollers 6, and the upper cross beam of the tensile machine moves downwards, so that the reverse bending test can be completed. The device can avoid S-shaped bending and improve the accuracy of reverse bending of the disc screw.
The utility model discloses the necessary pulling force machine that has to press to the function of make full use of laboratory carries out the bending test, when guaranteeing the experimental success rate, has saved the expense of purchasing bending/bending test machine, has reduced testing cost. In addition, before the test, the downward moving distance of the upper pressure head 1 during the 20-degree reverse bending can be calculated according to the mathematical trigonometric function relation, the displacement of the upper pressure head 1 is accurately monitored by utilizing a tensile machine scale, and the test efficiency and the precision of the sample reverse bending can be improved.
The time for completing the whole test by using the device is 1/3 of using a 40-bender or a 50-bender, and the device completely meets the standard requirement, and the success rate of the test reaches 100%. The use of the device enables the whole test process to be efficient, accurate and safe, and saves the cost for purchasing new equipment.
Claims (3)
1. A spiral shell reverse bending device for a steel bar bending test is characterized by comprising an upper pressure head (1), a base (4) and two V-shaped carrier rollers (6), the upper part of the upper pressure head (1) is connected with an upper cross beam of a tensile machine with a pressing function through a connecting rod (2), a clamping groove matched with the middle bending part of a steel bar sample (7) which is bent by 90 degrees in the forward direction is arranged on the lower end surface of the upper pressure head (1), the base (4) is located under the upper pressure head (1), the lower portion of the base (4) is connected with a lower cross beam of a tensile machine through a positioning pin (5), the two carrier rollers (6) are identical in height, rotating shafts (3) of the two carrier rollers are parallel to each other and are rotatably connected with the base (4) through bearings, and V-shaped clamping grooves in the roller surfaces of the two carrier rollers (6) correspond to straight arms at two ends of a steel bar sample (7) respectively.
2. The spiral shell reverse bending device for the steel bar bending test is characterized in that the clamping groove on the lower end face of the upper pressure head (1) is a V-shaped groove, and the two V-shaped carrier rollers (6) are arranged along the length direction of the V-shaped groove and are positioned right below the V-shaped groove.
3. The disc screw reverse bending device for the steel bar bending test is characterized in that two positioning pins (5) are arranged at the lower part of the base (4), and the two positioning pins are respectively embedded into two positioning holes on a lower cross beam of a tensile machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921102571.0U CN210487471U (en) | 2019-07-15 | 2019-07-15 | A spiral shell reverse bending device for steel bar bending test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921102571.0U CN210487471U (en) | 2019-07-15 | 2019-07-15 | A spiral shell reverse bending device for steel bar bending test |
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| Publication Number | Publication Date |
|---|---|
| CN210487471U true CN210487471U (en) | 2020-05-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921102571.0U Active CN210487471U (en) | 2019-07-15 | 2019-07-15 | A spiral shell reverse bending device for steel bar bending test |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
-
2019
- 2019-07-15 CN CN201921102571.0U patent/CN210487471U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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