Bolt tensile test tool and tensile test device using same

Abstract

The invention relates to a bolt tensile test tool and a tensile test device using the same. The bolt tensile test tool comprises a head connection piece and a screw connection piece which are arranged up and down in a use process, wherein the head connection piece is provided with a supporting plane for being in surface contact and in positioning and supporting match with the head of a corresponding bolt; the extending direction of the supporting plane is vertical to the up-down direction; and the screw connection piece comprises a bolt connection structure which is connected with a screw of the bolt and a ball hinging structure which is connected with a pulling-down head of a corresponding tensile machine. The bolt tensile test tool and the tensile test device using the bolt tensile test tool, which can guarantee that the axial direction of the screw is the same as the direction of the tensile force of the tensile machine, are provided by the invention.

Description

technical field [0001] The invention relates to a bolt tensile test tool and a tensile test device for testing the test tool. Background technique [0002] A bolt, as a commonly used fastener, includes a screw rod and a head arranged at the end of the screw rod. The tensile strength of bolts is an important indicator for testing bolt performance. With the rapid development of the aerospace field, the requirements for the connection performance of bolts between substrates in the aerospace field are getting higher and higher, and the tensile test methods and tooling of bolts are also constantly increasing. updates and improvements. The existing bolt tensile test tooling includes a head connector and a screw rod connector. When in use, the head connector and the screw rod connector are used to connect the head and the screw rod of the bolt to the upper and lower heads of the tensile machine respectively, and then pass The tensile machine performs a tensile test on the bolts, ...

AI Technical Summary

Problems solved by technology

The existing bolt tensile test tooling includes a head connector and a screw rod connector. When in use, the head connector and the screw rod connector are used to connect the head and the screw rod of the bolt to the upper and lower heads of the tensile machine respectively, and then pass The tensile machine performs a tensile test on the bolts, and the tensile machine outputs the tensile force in the straight up and down direction. However, due to the processing error and installation error of the tensile test tooling, and it cannot be automatically adjusted during connection, it is easy to cause the axial direction of the bolt to be different from that of the tensile machine. The tension direction is not consistent, which will easily cause eccentric load, produce longitudinal component force, reduce the axial force of the bolt, and have a great influence on the test results

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