Method and tool for checking forming quality of cementing surface of double-curved-surface variable-thickness aluminum honeycomb

Abstract

The invention relates to a method and a tool for checking the forming quality of a cementing surface of a hyperboloid variable-thickness aluminum honeycomb. The method comprises the following steps: laying a lower skin on a cementing mold; laying a lower plate-core verification film on the lower skin; laying lower woven cloth along the surface of the outer contour of the lower plate-core verification film, laying upper woven cloth on the cementing area of a rear edge strip, a first rib, a second rib, a beam and an upper skin, laying an upper plate-core verification film along the surface of the outer contour of the upper woven cloth, laying the upper skin on the upper plate-core verification film, carrying out vacuum packaging on the whole aluminum honeycomb structural part, putting the aluminum honeycomb structural part into an autoclave, after high-temperature pressurization for a period of time, opening the autoclave, taking out the honeycomb structural part, and separating out the upper plate-core verification film and the lower plate-core verification film; observing the depth degree of extrusion traces on the upper plate-core verification film and the lower plate-core verification film to verify the forming quality of the cementing surface of the aluminum honeycomb, the situation that the skin is damaged due to instability and slippage of the aluminum honeycomb is prevented, and the matching precision and verification comprehensiveness are improved.

Description

technical field [0001] The invention relates to the technical field of bonding of aluminum honeycomb structures, in particular to a method and tooling for checking the forming quality of the bonding surface of a hyperboloid variable-thickness aluminum honeycomb. Background technique [0002] Such as figure 1 As shown, the aluminum honeycomb is a hyperboloid variable-thickness part, which is generally obtained by double-sided CNC machining of aluminum honeycomb blanks; during processing, the aluminum honeycomb is first fixed on the auxiliary platform to process the B side, then the part is turned over, and the B side is installed and fixed. On the tooling, the A side is processed last; because the aluminum honeycomb blank to be processed is a flexible material, it cannot be clamped as stably as a rigid material during CNC machining, and clamping methods such as adsorption and pasting are often used or the rigidity is pressed after the filling medium is densified. Material cl...

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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