Reinforcing steel bar fatigue strength detector

Abstract

The invention discloses a reinforcing steel bar fatigue strength detector, which comprises a rectangular frame, wherein two ends of the frame are respectively provided with a force applying part which is coaxially arranged and can apply an acting force along the length direction, the force applying part is internally provided with a clamping part capable of clamping a workpiece, and a pull pressure sensor is arranged between the clamping part and the force applying part along the axis; the clamping part comprises a force applying outer sleeve and a locking inner sleeve which are coaxially sleeved, the force applying outer sleeve is relatively and fixedly connected with the force applying part, the contact surface of the force applying outer sleeve and the locking inner sleeve is a conical surface, and a pre-tightening ejection block capable of applying pre-tightening force to one end of the locking inner sleeve is arranged in the force applying part. According to the reinforcing steel bar fatigue strength detector, the conical locking inner sleeve structure is adopted, the inner diameter of the inner sleeve can be automatically adjusted along with the action of axial tension, loosening of the workpiece and the clamp is avoided, and the accuracy of a test result is guaranteed.

Description

technical field [0001] The invention relates to the technical field of steel bar fatigue strength testing equipment, in particular to a steel bar fatigue strength testing instrument. Background technique [0002] When testing the performance of steel bars, it includes applying an axial reciprocating pull-out force to the steel bars. Most of the existing pull-out testing machines use direct clamping to fix the steel bars. Because the steel bars have certain ductility, when the axial When the tensile force is too large, the diameter of the steel bar will change, which will cause loosening with the clamping mechanism, resulting in a decrease in the clamping effect and affecting the test results. Contents of the invention [0003] The technical problem to be solved by the present invention is to overcome the existing defects and provide a steel bar fatigue strength tester, which adopts a conical locking inner sleeve structure, which can automatically adjust the inner diameter ...

AI Technical Summary

Problems solved by technology

[0002] When testing the performance of steel bars, it includes applying an axial reciprocating pull-out force to the steel bars. Most of the existing pull-out testing machines use direct clamping to fix the steel bars. Because the steel bars have certain ductility, when the axial When the tensile force is too large, it will cause the diameter of the steel bar to change, which will cause loosening with the clamping mechanism, resulting in a decrease in the clamping effect and affecting the test results

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