Method for calibrating the quality of the bonding surface of the hyperboloid variable thickness aluminum honeycomb and its calibrating tool

Abstract

The invention relates to a method and a tool for verifying the forming quality of the glued surface of a hyperboloid variable-thickness aluminum honeycomb. Lay a lower woven cloth on the outer contour surface of the board-core verification membrane, and lay an upper woven cloth on the trailing edge strip, the first rib, the second rib and the gluing area between the beam and the upper skin, along the outer contour of the upper woven cloth Lay the upper plate-core verification film on the surface, lay a skin on the upper plate-core verification film, vacuum-package the aluminum honeycomb structure as a whole and put it into an autoclave. After a period of high temperature and pressure, open the autoclave. Take out the honeycomb structure, disassemble the upper plate-core verification film and the lower plate-core verification film; observe the compression marks on the upper plate-core verification film and the lower plate-core verification film The degree of depth is used to verify the forming quality of the bonding surface of the aluminum honeycomb, to prevent the aluminum honeycomb from slipping and damaging the skin, and to improve the matching accuracy and the comprehensiveness of the calibration.

Description

technical field [0001] The invention relates to the technical field of aluminum honeycomb structure gluing, in particular to a method for verifying the forming quality of the gluing surface of a hyperboloid variable-thickness aluminum honeycomb and a verifying tool. Background technique [0002] like figure 1 As shown, the aluminum honeycomb is a hyperboloid variable thickness part, which is generally obtained by double-sided CNC machining from aluminum honeycomb blanks; during processing, the aluminum honeycomb is first fixed on the auxiliary platform to process the B side, and then the part is turned over and the B side is installed and fixed. On the tooling, the A surface is finally processed; since the aluminum honeycomb blank to be processed is a flexible material, it cannot be clamped stably like a rigid material during CNC machining. Material clamping; for flexible materials, the CNC machining shape and surface deviation must be greater than that of rigid materials s...

AI Technical Summary

Problems solved by technology

When the current calibration method is used to test the conventional size aluminum honeycomb (single or wedge-shaped section, thickness not exceeding 150mm, cell side length 2mm ~ 4mm, density 50Kg / m3 ~ 80Kg / m3), the aluminum honeycomb has sufficient loss resistance. stable ability, when heated and pressurized in the autoclave, it can provide stable support for the upper skin and the lower skin without causing instability and slippage, and for the aluminum honeycomb involved in the invention, in the limit case, it is a kind of The large-cell low-density hyperbolic variable-thickness aluminum honeycomb with a cell side length of 5mm and a density of 31Kg / m3, when its thickness reaches 220mm, its anti-stabilization ability drops sharply. When the calibration process is heated and pressurized, the aluminum honeycomb no longer has Sufficient support stability, the honeycomb wall is easily unstable under the action of external fluctuations. After the honeycomb is unstable, the upper skin forms a concentrated load that acts on the aluminum honeycomb, causing the aluminum honeycomb to slip and the upper skin to be damaged.

[0004] For the processing deviation detection of large-thickness, large-cell, low-density, hyperbolic variable-thickness aluminum honeycomb, the conventional calibration film calibration method cannot be used, but the jamming detection is often used; when the jamming detection is performed, the aluminum honeycomb is restored to the honeycomb processing mold On the surface, with the help of several surface detection clamps placed on it, the processing deviation of the A surface and the B surface is measured by the feeler gauge method. The limitation of this measurement method is that it cannot truly and comprehensively reflect the upper skin like the calibration film calibration. , the cooperation between the lower skin and the aluminum honeycomb may cause subsequent under-compensation or over-compensation, and the data is discrete and discontinuous, and part of the over-standard deviation may not be obtained, which may easily cause compensation omissions, and eventually lead to disengagement when the honeycomb structure is bonded. sticky defect

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