Numerical control machining method for aluminum honeycomb of double-curved-surface flow guide plate of airplane

Abstract

The invention provides a numerical control machining method for an aluminum honeycomb of a double-curved-surface flow guide plate of an airplane. An aircraft hyperboloid flow guide plate is of an aluminum honeycomb sandwich structure, one face of the aluminum honeycomb is a convex curved face, and the other face is a concave curved face. The method comprises the steps of blank cutting, curing, one-time milling (concave curved surface, contour and process allowance milling), curing agent removal, semi-finished product cleaning and drying, semi-finished product repositioning, curing, two-time milling (convex curved surface and contour milling), curing agent removal, cleaning, inspection and warehousing. According to the method, auxiliary contour positioning is carried out through the process allowance reserved by one-time milling, and the secondary positioning error caused by large size and poor rigidity after the aluminum honeycomb is overturned is solved; a process support is reserved during one-time milling, so that the cutter relieving and overcutting phenomenon generated during two-time milling of the molded surface of the forward inclined area is avoided; during two-time milling, cutting component force is reasonably distributed by adopting a section bidirectional cutter splicing method, so that separation and debonding of the aluminum honeycomb and a tool caused by hot melting of a curing agent during milling are effectively prevented, and the surface quality and precision of a product are improved.

Description

technical field [0001] The invention relates to the field of metal material manufacturing, and more specifically relates to a numerical control processing method for an aluminum honeycomb of an aircraft hyperboloid deflector. Background technique [0002] The CNC machining of hyperboloid aluminum honeycomb usually uses one-time milling of the concave surface and contour, and uses the net size of the contour and the secondary positioning of the concave surface to process the convex surface. For large-sized parts with a forward-inclining area (that is, the depth direction of the contour is not parallel to the T-direction of the honeycomb) when machining a convex surface, the knife will cause the part to overcut in the forward-inclining area; Due to the large surface curvature, the surface is prone to defects such as tearing and extrusion deformation. [0003] For example, for the honeycomb core part of a certain type of aircraft deflector, there is an inclination angle of 24°...

AI Technical Summary

Problems solved by technology

For large-sized parts with a forward-inclining area (that is, the depth direction of the contour is not parallel to the T-direction of the honeycomb) when machining a convex surface, the knife will cause the part to overcut in the forward-inclining area; Due to the large surface curvature, the surface is prone to defects such as tearing and extrusion deformation

[0003] For example, for the honeycomb core part of a certain type of aircraft deflector, there is an inclination angle of 24°, the length is 3.2m-3.7m, the width is more than 100mm, and the maximum depth is 200mm. The traditional method has an overcut of more than 2.5mm. Far from meeting the machining accuracy requirements

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