Perforating process of composite carbon fiber material product

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...

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