Perforating process of composite carbon fiber material product

A composite material and process method technology, which is applied in the field of hole making technology for carbon fiber composite material products, can solve problems such as excessive cutting amount of composite materials, achieve reliable technical support, increase polishing, and avoid hole making and delamination effect of the phenomenon

Active Publication Date: 2007-06-27
CHENGDU AIRCRAFT INDUSTRY GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing hole-making parameters refer to the logic of metal hole-making, mainly hole expansion, but because of the excessive cutting amount, the composite parts are greatly squeezed during the hole-making process, resulting in extrusion delamination

Method used

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Examples

Experimental program
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Effect test

Embodiment Construction

[0011] According to the process method for making holes in composite material parts provided by the present invention, a drill bit made of cemented carbide is selected. Choose cemented carbide drill cutters and preferably solid alloy drill cutters. The helix angle and apex angle of the drill bit should be selected. We know that the larger the helix angle, the better the chip removal ability, and it is not easy to form accumulation chips. Because the composite drilling chips are powdery, the smaller the helix angle, the easier it is to block the helical groove, so that the processing temperature is not easy to evaporate, thus affecting the processing quality. . But at the same time, the size of the helix angle will also affect the rigidity of the tool. Based on this, a 20° helix angle is preferred. At the same time, under the condition of ensuring the strength of the cutter body, the thickness of the cutter core can also be reduced, the chip pocket can be enlarged, and the su...

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Abstract

The perforating process of composite carbon fiber material product includes the following main steps: sorting hard alloy drilling bit with helix angle of 20 deg, vertex angle not smaller than 120 deg and chisel width of 0.06-0.1 D; drilling the guide hole based on the cutting force formula F=CFdxffYFvZFN; reaming at medium speed; and statically withdrawing the reamer. The improved perforating process has no delamination of the composite material, high production efficiency and high product quality.

Description

technical field [0001] The invention relates to a hole-making process for products made of carbon fiber composite materials. Background technique [0002] According to the molding process, composite products are divided into two-dimensional laminates and three-dimensional textile structures. The layup is carried out in the order of 45° / 90° / 0° / -45° / 45° / -45° / 0° / 45° / 90°, and there is no fiber reinforcement between the layups. When the composite material is subjected to external loads, it is often the first to produce delamination caused by the coupling of normal stress and shear stress between layers. The hole-making methods of composite products in the prior art still follow the hole-making process parameter mode of metal parts in terms of tool materials and hole-making parameters, and do not consider the performance of composite parts themselves to a large extent. Therefore, Interlayer separation (commonly known as delamination) and fiber tearing are prone to occur during t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P13/00B23B51/00B23B35/00B23D75/00B23Q15/08
Inventor 李建川李辉蒋敏
Owner CHENGDU AIRCRAFT INDUSTRY GROUP
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