Perforating process of composite carbon fiber material product

Abstract

The invention relates to a hole-making process for carbon fiber composite products, which mainly includes: selecting a cemented carbide drill bit with a helix angle of 20°, a vertex angle of ≥120°, and a chisel edge width of 0.06D to 0.1D; according to the cutting force formula: F=CFdxffYFvZFN, select the diameter of the initial hole of the composite material product to be smaller than the diameter of the hole to be processed for directional initial drilling; use reaming as the main hole and reaming as the auxiliary, and the reaming speed is controlled at a medium speed of 500 to 800r / min; Reamer retraction adopts static retraction. The present invention proves through a large number of tests and production practice that reasonable selection of tool material and parameters of tool helix angle, apex angle and chisel edge can improve the hole-making steps, improve the hole-making process, and avoid the phenomenon of stratification in hole-making of composite parts. It solves the problem of high out-of-tolerance rate in hole-making layering of composite parts in the prior art, and ends the 12% out-of-tolerance history of each frame of a certain type of machine, which speeds up the overall production of a certain type of machine and improves product quality. The improvement has laid a solid technical guarantee.

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