Hole machining drill bit and hole machining method suitable for carbon fiber composite materials

Abstract

The invention discloses a hole machining drill bit and a hole machining method suitable for carbon fiber composite materials. The diameter of the drill bit is 6 mm, the drill point angle of the drill bit is 96 degrees, the helix angle of the drill bit is 28 degrees, the relief angle of the drill bit is 25 degrees, the length of a chisel edge is 0.028 time of the diameter of the drill bit, and the roughness of the surface of a front tool face and the surface of a rear tool face of the drill bit is 0.65 micrometer. The specific using method comprises the steps that the rotation speed of the drill bit is set to be 2350 r/min, and the feeding speed is set to be 0.018 mm/r. By means of the hole machining drill bit and the hole machining method, the phenomena that burrs occur at an inlet, and layering even fracture occurs at an outlet in the machining process of the carbon fiber composite materials are effectively avoided, the machining precision of the carbon fiber composite materials is effectively improved, and the product qualification ratio of the machining of the carbon fiber composite materials is increased; the connection and assembling quality of aerospace and national defense equipment is improved, and the quality of the whole equipment is effectively improved.

Description

technical field [0001] The invention relates to the field of carbon fiber composite material processing, in particular to a hole processing drill suitable for carbon fiber composite materials and a hole processing method. Background technique [0002] With the development of aerospace technology and the upgrading of national defense equipment, lightweight and high power density equipment has attracted great attention from all over the world. Carbon fiber composite materials have light weight, high strength, high modulus, wear resistance, high temperature resistance, and Corrosion, anti-fatigue and other series of superior properties are actively applied and pursued by various countries. However, in the prior art, 60% to 80% of the structural damage of aerospace vehicles occurs at the connection parts, which also puts forward high requirements on the connection and assembly quality of resin-based carbon fiber composite parts. At present, there are many problems in the hole-m...

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Problems solved by technology

However, in the existing technology, 60% to 80% of the structural damage of aerospace vehicles occurs at the connection parts, which also puts forward high requirements on the connection and assembly quality of resin-based carbon fiber composite parts

At present, there are many problems in the hole-making process of composite materials. Traditionally, high-speed steel or carbide tools with ordinary twist drills are used for drilling. There are burrs at the outlet and delamination or even tearing at the exit. Not only is the production efficiency low, but there are also systems such as unstable hole quality, short tool life, splitting and shrinkage holes in hole making, and low product qualification rate. question

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