Control method for core lattice deformation in honeycomb core bending process

A control method and honeycomb core technology, applied in the direction of control lamination, chemical instruments and methods, lamination devices, etc., can solve the problems of unstable product quality, low efficiency, poor consistency, etc., and achieve the effect of excellent mechanical properties

CN114132046AActive Publication Date: 2022-03-04XI'AN AIRCRAFT INTERNATIONAL
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2022-03-04

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Abstract

A control method for core lattice deformation in the honeycomb core bending process comprises the steps that bending tests are conducted on honeycomb cores with different thicknesses under different bending radiuses, the inner surfaces of the honeycomb cores are deformed and collapsed in the bending state, and the number of the deformed and collapsed core lattices on the inner surfaces of the honeycomb cores is counted; measuring and counting the collapse quantity and deformation quantity of the honeycomb cores with different thicknesses under different bending radiuses, and determining the slotting spacing of the honeycomb cores with different thicknesses under different bending radiuses according to the deformation requirement of the honeycomb core bending process on the premise of ensuring that the core grids do not collapse in the honeycomb core bending process; the collapsing quantity and the deformation quantity of the core grids are compensated through the slotting spacing; on the premise of determining the grooving distances of the honeycombs with different thicknesses under different bending radiuses, the grooving angle is further determined.
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Description

technical field

[0001] The invention relates to a method for controlling cell deformation and slotting during the bending process of a honeycomb core, and belongs to the field of composite material sandwich structure manufacturing. Background technique

[0002] The honeycomb sandwich structure is composed of two high-strength upper and lower panels and a thick and light honeycomb core in the middle. It has excellent characteristics such as light weight, high specific strength, high specific stiffness and high energy absorption efficiency. It is widely used in aviation Aerospace and other fields, such as wing leading edge U-shaped parts, flaps, ailerons, spoiler rudders, elevators, vertical and flat tail panels, engine nacelles, fairings and other structures.

[0003] Most of the composite components of honeycomb sandwich have complex free-form surface shapes, and their manufacturing process usually includes steps such as outer skin laying, honeycomb core stabilization treatm...

Examples

Embodiment Construction

[0017] In order to solve the severe stretching and extrusion deformation between the honeycomb core cells due to bending in the manufacturing process of the honeycomb sandwich structure with a complex shape, the present invention proposes a method for controlling the cell deformation and slotting during the bending process of the honeycomb core. The process is: for honeycomb cores of different thicknesses, carry out bending tests under different bending radii; evaluate the deformation of the upper surface of the honeycomb core, count the number of cell collapses, and determine the groove spacing of the honeycomb cores of different thicknesses under different bending radii.

[0018] On the basis of determining the slotting spacing of different thickness honeycombs under different bending radii, assuming that the slotting depth is 2 / 3 of the honeycomb thickness, and the slotting honeycomb is completely closed after bending, the slotting angle, slotting spacing and bending radius ...