Manufacturing tool for connecting hole of structural member and manufacturing method

Abstract

The invention discloses a manufacturing tool for a connecting hole of a structural member and a manufacturing method. The manufacturing tool comprises a multifunctional drill bit and a backing plate for supporting the structural member, the multifunctional drill bit comprises a first cutter body, a second cutter body, a third cutter body and a friction extrusion body which are sequentially connected, wherein the diameters of the first cutter body, the second cutter body and the third cutter body are sequentially increased, and the diameter of the friction extrusion body is larger than the holediameter of the third cutter body so as to be used for generating the extrusion interference magnitude on the connecting hole. By means of the manufacturing tool and the manufacturing method, the first cutter body, the second cutter body, the third cutter body and the friction extrusion body which are gradually increased are used, the gradient design of the three cutter bodies enables the connecting hole with the hole diameter small than a present value to be formed on the connecting member, the diameter of the friction extrusion body is larger than the hole diameter of the third cutter bodyso as to be used for generating the extrusion interference magnitude to the connecting hole, so that the strength of the formed connecting hole is larger.

Description

technical field [0001] The invention relates to the field of manufacturing connecting holes, in particular to a manufacturing tool and a manufacturing method for connecting holes of structural parts. Background technique [0002] In industrial applications such as aviation, aerospace, trains and ships, the connecting parts of structural parts are often subject to large dynamic loads, especially the riveting and other connecting parts based on connecting holes are prone to fatigue cracks, and the resulting connecting holes Pore ​​cracks have become the main form of structural failure. Therefore, it is of great value and significance to optimize the manufacturing method of the connecting hole and improve the service reliability of the connecting piece. [0003] In our country, the processing of connecting holes of structural parts is mainly realized through steps such as drilling, reaming, reaming, and hole extrusion. The purpose of drilling and reaming is to roughly machine...

AI Technical Summary

Problems solved by technology

[0004] In the existing connection hole processing, the processing and strengthening processes are distributed, which not only prolongs the processing cycle, consumes manpower and material resources, but also makes it difficult to ensure the processing accuracy between one processing method and the next processing method, which will affect the final connection. Poor hole quality has adverse effects, resulting in problems such as long processing cycle, low production efficiency, unstable precision, and resource consumption.

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