Compound tool applicable to high-speed and accurate holing on aircraft panel

Abstract

The invention discloses a compound tool applicable to high-speed and accurate holing on an aircraft panel. The compound tool is provided with a double-helical side edge, the helical angle of the side edge is 30-40 degrees, a bottom edge is divided into three sections, i.e., a chisel edge, rough machining edges and finish machining edges; the included angle of the two rough machining edges is 120-150 degrees, and the included angle of the two finish machining edges is 60-65 degrees; a dimpling edge is connected with the helical side edge; and after holes are drilled through, the tool is fed continuously, and the dimple machining is finished by utilizing the dimpling edge. The compound tool disclosed by the invention has the advantages that the hole drilling, hole reaming and dimpling can be finished once without need of tool change, and the roughness of the machining surfaces of the holes reaches Ra1.6.

Description

technical field [0001] The invention belongs to the technical field of aircraft assembly, and relates to a compound tool suitable for high-speed and precise hole making of aircraft wall panels. Background technique [0002] An aircraft is made up of a large number of parts connected by fasteners. In order to connect parts with fasteners, holes must be made in aircraft parts. Holes for fasteners on aircraft require low surface roughness and high precision. Moreover, in order to ensure the smooth outer surface of the aircraft and reduce air resistance, the fastener holes on the outer skin surface of the fuselage and wing must be spot-faced after drilling. After the fastener is inserted into the connecting hole, the nail head and the skin surface flush. In order to meet the accuracy requirements of fastener connecting holes, the current process is to drill the initial hole with a drill bit, then use a large-diameter drill bit to ream the hole, and then use a series of reamer...

AI Technical Summary

Problems solved by technology

In order to meet the accuracy requirements of fastener connecting holes, the current process is to drill the initial hole with a drill bit, then use a large-diameter drill bit to ream the hole, and then use a series of reamers with increasing diameters to ream the holes. The amount of reaming per knife It is about 0.5mm, so each connection hole needs to be processed many times to complete, and it needs a lot of tools and processing time, the efficiency is low, and there are many factors affecting the accuracy

In addition, with the existing technology, after the connection hole is processed to meet the diameter requirement, it is necessary to perform spot facing separately, which further increases the amount of tools and reduces the efficiency

And because the connection hole and the taper socket are processed separately, the coaxial accuracy of the hole and the taper socket is affected

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