Processing method of curved surface of thin-walled honeycomb core material

Abstract

The invention discloses a machining method of a thin-wall honeycomb core material curve machining molded surface, and aims to provide a honeycomb machining method with high milling efficiency and capable of prolonging the life of a special honeycomb combined milling tool. The machining method is realized through the following technical scheme: when a double sided tape fixing state at the earlier stage of honeycomb machining is good, the special honeycomb combined milling tool with a conical disc return milling tool is changed for cutting; the rotating direction of the special honeycomb combined milling tool is changed; the conical disc return milling tool for feeding by a wedged angle of 30-45 degrees through high-speed rotation is used for cutting roughing; according to an anticlockwise tool rotating mode in the tool rotating direction, the downward pressure is applied to a honeycomb thin-edge area (1) through anticlockwise rotation; the part, easy to be pulled and damaged, of the thinnest honeycomb edge of the honeycomb bottom cutting profile is firstly machined; and after the honeycomb thin-edge area (1) of a NOMEX honeycomb part blank is machined, the sequential gradient machining is performed in (2-6) thickness direction of the thick-edge area cutting profile layer by layer, and the other parts are machined.

Description

technical field [0001] The invention relates to a processing and manufacturing process of a honeycomb core material Nomex honeycomb part in the mechanical field, in particular to a processing method of a thin-walled aramid paper-based honeycomb core. [0002] technical background [0003] As a kind of porous material, honeycomb material is very different from solid material. Its mechanical properties depend not only on the properties of the matrix material itself, but also on the geometric topology of the microscopic pores of the honeycomb material and the shape of the honeycomb cells. The structural parameters of the local characteristic units affect the macroscopic mechanical properties of the honeycomb, and the honeycomb core materials of different cells have different properties. Aluminum honeycomb foam or glass cloth sandwich is usually used as the core material in aircraft structure. The honeycomb has the advantages of high compression modulus and light weight. They are...

AI Technical Summary

Problems solved by technology

Although the honeycomb sandwich structures such as aluminum alloy sandwich core and glass cloth sandwich core used as honeycomb sandwich core in the early stage have outstanding advantages over metal plate gold structure in performance, honeycomb sandwich materials such as aluminum alloy sandwich core and glass cloth sandwich core have been used in the process of use. There are still a series of problems in the aluminum honeycomb core: the aluminum honeycomb core has good mechanical properties, good durability, thermal conductivity, mature but complicated process, electrochemical corrosion will occur when it is in direct contact with the carbon fiber composite material panel, and the rigid aluminum alloy honeycomb is bonded to the composite material panel. It is difficult, and machining requires high processing precision and complicated processes for panels and honeycomb cores

Nomex honeycomb sandwich Nomex honeycomb parts processing and holding status Nomex honeycomb has a series of advantages, but also accompanied by an important disadvantage: because Nomex honeycomb is a thin-walled porous structure, the wall thickness is only 0.06 ~ 0.1mm, the pores The side length of the grid is generally between 2-5mm, so that the honeycomb has high strength along the cell axis, but the equivalent strength in the plane is very small

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