Steel bar cold bending testing machine and its testing method
A cold-bending test and steel bar technology, which is applied in metal processing equipment, metal processing, manufacturing tools, etc., can solve the problems of inaccurate test results and inability to accurately control the cold-bending bending angle of steel bars, and achieve the effect of accurate test results
Active Publication Date: 2021-08-24
深圳市恒义建筑技术有限公司
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Problems solved by technology
[0004] However, the above-mentioned invention has the following disadvantages: when the bending core presses down on the steel bar, the traditional method uses the naked eyes of the staff to judge the pressure to a certain degree of curvature, and cannot accurately control the bending angle of the cold-bending steel bar, resulting in inaccurate test results
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[0043] A kind of steel bar cold bending testing machine, see figure 1 , including a base 1, a workbench 2 and a force applying mechanism 3 are fixed on the top of the base 1, and a positioning mechanism 4 for fixing steel bars is fixed on the workbench 2. The reinforcing bar is fixed on the positioning mechanism 4, and the force applying mechanism 3 can apply pressure to the reinforcing bar and cold-bend the reinforcing bar.
[0044] see figure 2 with image 3The force applying mechanism 3 includes an oil cylinder 31 fixed on the top of the base 1 , the piston rod of the oil cylinder 31 is arranged toward the positioning mechanism 4 , and the end of the piston rod of the oil cylinder 31 is detachably connected with a bending core 32 . One end of the bent core 32 towards the piston rod is provided with a circular hole 321 for plugging the piston rod, and the bent core 32 and the piston rod are respectively provided with two through holes 1 322 and 2 33 for bolts to pass thro...
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The invention discloses a steel bar cold bending testing machine, belonging to the field of steel bar cold bending testing equipment, which includes a base, a workbench is fixed on the top of the base, and a force applying mechanism is fixed on one side of the workbench. A positioning mechanism for fixing the steel bar and a limit mechanism for accurately limiting the bending angle of the steel bar are provided; the invention also discloses a test method of a steel bar cold bending testing machine: a1. Fix the steel bar on the workbench; a2. adjust the position of the stopper according to the angle to be measured; a3. apply pressure to the steel bar to its cold bending; a4. remove the cold-formed steel bar from the workbench; a5. evaluate the test results, the present invention It has the effect of being able to accurately control the bending angle of cold-bending steel bars, resulting in more accurate test results.
Description
technical field [0001] The invention relates to the field of steel bar cold bending testing equipment, in particular to a steel bar cold bending testing machine and a testing method thereof. Background technique [0002] The steel cold bending test is the characteristic of the stress and strain of the steel bar under the action of external force, which is expressed by the stress-strain curve when stretching. There are yield point, ultimate tensile strength elongation, cold bending performance and other indicators. The evaluation method of the test results can be as follows: when there is no crack, crack or fracture when bending to a certain extent, the test piece is qualified; as long as one item of the length and width specified in the micro-crack, crack, and crack reaches a certain range, the should be rated at this level. [0003] The prior art can refer to the Chinese invention patent whose authorized notification number is CN100557411, which discloses a double-station...
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IPC IPC(8): B21F1/00B21C51/00
Inventor 李康彭曹明和星宇
Owner 深圳市恒义建筑技术有限公司