Carbon fiber composite material hole forming method

Abstract

The invention discloses a carbon fiber composite material hole forming method. According to the hole forming method, the problems of delamination and tearing defects in holes of a carbon fiber composite material according to an existing hole forming method are solved. According to the technical scheme, the carbon fiber composite material hole forming method includes the steps that firstly, a metaltape is pasted on the cutter-outlet surface of the holes for forming holes in a carbon fiber composite material; secondly, a dagger drill is used to drill the initial holes in the carbon fiber composite material, and the initial holes penetrate through the carbon fiber composite material and the metal tape; then, the dagger drill is used to ream the initial holes; then, the dagger drill is used to ream the drill holes, the difference between the diameter of the reamed drill holes and the diameter of the drill holes before reaming is not more than 1.0mm; then, hole reaming is repeated, so thatthe diameter of the holes after reaming is 0.1-0.2mm smaller than the diameter of the final holes; and finally, a reamer is used to form the final holes on the drill holes. The carbon fiber compositematerial hole forming method is suitable for forming holes in the carbon fiber composite material, the defects of delamination and tearing of holes can be avoided, and the quality of hole forming isimproved.

Description

technical field [0001] The invention relates to a hole-making method, in particular to a hole-making method for carbon fiber composite materials. Background technique [0002] During the manual hole making process, the carbon fiber material layer will generate interlayer pressure under the action of the axial force of the drill bit. If there is no supporting force from other parts at the exit end of the hole making part, the hole making feed speed will increase at the moment the drill bit drills through the part. And the phenomenon of excessive interlayer pressure. If the interlayer stress exceeds the strength of the carbon fiber resin matrix, the carbon fiber composite material layer will be separated from the resin matrix, resulting in hole tearing and delamination defects. [0003] Reducing the feed rate can alleviate orifice tearing and delamination defects. The same operator uses the same ordinary drill bit to directly drill the 5.0mm thick carbon fiber composite mate...

AI Technical Summary

Problems solved by technology

[0007] The invention provides a carbon fiber composite material hole-making method, which solves the problem of delamination and tearing defects in the hole of the carbon fiber composite material according to the existing hole-making method