Reinforcing steel bar cold bending testing machine and testing method thereof

Abstract

The invention discloses a reinforcing steel bar cold bending testing machine, and belongs to the field of reinforcing steel bar cold bending testing equipment. The reinforcing steel bar cold bending testing machine comprises a base, a workbench is fixedly arranged at the top of the base, and a force applying mechanism is fixedly arranged on one side of the workbench. A positioning mechanism for fixing reinforcing steel bars and a limiting mechanism for accurately limiting the bending angle of the reinforcing steel bars are arranged on the workbench. The invention further discloses a testing method of the reinforcing steel bar cold bending testing machine. The testing method comprises the steps that a1, the reinforcing steel bars are fixed to the workbench; a2, the position of a check blockis adjusted according to the angle needing to be measured; a3, the reinforcing steel bars are pressurized to achieve cold bending; a4, the reinforcing steel bars subjected to cold bending are taken down from the workbench; and a5, the testing result is evaluated. The reinforcing steel bar cold bending testing machine and the testing method thereof have the effects that the bending angle of reinforcing steel bar cold bending can be accurately controlled, and therefore the testing result is more accurate.

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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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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