Stepped drill reamer for machining aircraft skin rivet holes

Abstract

The invention provides a stepped drill reamer for machining aircraft skin rivet holes. The problems of a traditional method that machining efficiency is low; production cost is high; and machining quality cannot meet requirement can be solved. A reamer body comprises a first cylinder and a second cylinder which are concentrically connected into a whole from front to back; the diameter D1 of the first cylinder is smaller than the diameter D2 of the second cylinder; two first slag discharging grooves which are centrally symmetrical are formed in the periphery of the first cylinder, and two landsare formed on the periphery of the first cylinder; two second slag discharging grooves which are centrally symmetrical are formed in the periphery of the second cylinder; the two first slag discharging grooves in the periphery of the first cylinder both extend to the periphery of the second cylinder; the first slag discharging grooves and the second slag discharging grooves in the second cylinderare connected; the periphery of the second cylinder is divided to form two circumferential edges by the two first slag discharging grooves and the two second slag discharging grooves in the second cylinder; each land on the first cylinder is connected with the corresponding circumferential edge of the second cylinder in a transition mode through a stepped angle; the core thickness d1 of the firstslag discharging groove ranges from 0.25D1 to 0.35D1; the core thickness d2 of the second slag discharging groove ranges from 0.25D2 to 0.35D2; and d1 is smaller than d2.

Description

technical field [0001] The invention relates to the field of mechanical processing, in particular to a step drill reamer used for processing aircraft skin rivet holes. Background technique [0002] The riveted structure has good connection strength and reliability, and is the most important connection method in aircraft assembly, and riveting accounts for more than 70% of all connection methods in aircraft installations. Riveting is mainly used in the skin parts of aircraft, such as the connection between aircraft skin and skin, between skin and frame, between skin and rib, and between skin and other components, and it is also used in girder assembly , the assembly and connection of ribs, frames, ribs and strips, the installation of accessories on various parts, and the joining of a large number of supports and other components. [0003] The riveted structure is one of the parts that are prone to failure in the aircraft structure. It is not only a key part of the static str...

AI Technical Summary

Problems solved by technology

[0006] In view of the above problems, the present invention provides a step drill reamer for processing aircraft skin rivet holes, which can solve the problems of low processing efficiency, high production cost and unsatisfactory processing quality in the existing traditional processing methods

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