cfrp hole opening method and cfrp workpiece

Abstract

The invention provides an opening method of a CFRP (Carbon Fiber Reinforced Plastics) and a CFRP work-piece. The opening method of the CFRP comprises the steps of using a first drill bit with a diamond coating to drill, wherein the revolving speed of the first drill bit is 2,500-3,500 / min, the feed rate is 200-280mm / min, and the cutting depth is 5-9mm, when the drilling is carried out; using a second drill bit with a diamond coating to perform broaching, wherein the revolving speed of the second drill bit is 1,500-3,500r / min, the feed rate is 120-200mm / min, and the cutting depth is 2-6mm, when the broaching is carried out. According to the opening method of the CFRP provided by the invention, the drill bits with the diamond coatings are adopted to drill, so that the CFRP can be quickly and smoothly cut, and the excessive temperature of tools can be prevented; furthermore, a way of drilling and then broaching is adopted to open the hole, and the used drill bits are adjusted according to pore sizes, so that the opening speed is fast, the hole wall of the opened hole is smooth, and the opening quality is good.

Description

technical field [0001] The invention relates to the field of composite material processing technology, in particular to a CFRP hole opening method and a CFRP workpiece. Background technique [0002] Composite materials refer to materials with new properties macroscopically composed of two or more materials with different properties through physical or chemical methods. Various materials in the composite material learn from each other in terms of performance and produce a synergistic effect, so that the comprehensive performance of the composite material is better than that of the original constituent materials. Composite materials usually include matrix materials and reinforcement materials. Reinforcement materials mainly include glass fiber, carbon fiber, boron fiber, aramid fiber, silicon carbide fiber, asbestos fiber, whisker, metal wire and hard fine particles. [0003] Carbon Fiber Reinforced Polymer / Plastic (CFRP, Carbon Fiber Reinforced Polymer / Plastic) has the chara...

AI Technical Summary

Problems solved by technology

The Chinese patent application publication CN101445383A published on June 3, 2009 discloses a method for manufacturing carbon fiber reinforced composite parts, which uses a pre-set slender tool to achieve the purpose of opening holes, but this method cannot Meet the processing requirements for CFRP

During the opening process of CFRP, the carbon fiber is removed in the form of brittle fracture, which can only take away a small amount of heat generated by processing, so the temperature of the cutting edge of the tool is very high, thereby reducing the life of the tool

At the same time, the matrix material of CFRP is easy to chemically react with the surface of the tool, resulting in a decrease in the strength of the surface of the tool. What is more serious is that due to the insufficient strength of the ordinary tool, the end of the carbon fiber is often exposed on the hole wall of the hole opened by the ordinary tool. The hole wall is not smooth and does not meet the process requirements

Images