Abstract
Because of increasingly stricter safety rules, requirements regarding the quality of the components used in the airline industry have increased. Besides the materials used in aircraft components and areas where they are machined, these components must comply certain standards for quality and tolerances of the machined surfaces.Due to high hardness of carbon fibers, hole machining in carbon fiber reinforced plastics has always been a challenge. Wear that occurs in the cutting tool leads to the appearance of workpiece defects such as delamination, peeling, fiber pulling out, etc. Besides cutting tool geometry, a very important role on tool wear, it is owned by the material from which it is made. This paper will make a quantitative assessment of defects that occur in the process of CFRP (carbon fiber reinforced plastics) drilling and a cutting tool wear evaluation. In order to obtain conclusive results for this study will be used three drill bits with the same geometry but different carbides.The aim of this paper is to find which one of this three carbide used is more feasible for holes machining in composite materials reinforced with carbon fibers.
Highlights
In the entire world, the growing demand for new materials with new or better chemical and physical properties has increased a lot in the last 20 years
In the last 20 years, the carbon fiber reinforced plastics had started to replace the conventional materials in many industrial applications
Because of that in this paper was made, firstly, an assessment of the problems that appear during the holes machining regarding the workpiece quality and regarding the cutting tool wear
Summary
The growing demand for new materials with new or better chemical and physical properties has increased a lot in the last 20 years Due to their weight-specific properties, low thermal expansion, high chemical resistance, etc. At CFRP machining must be taken into account other defects that can occur, as delamination, pull outs, fibers projection, pyrolysis, etc., partially represented in Figure 2 [3]. These problems occur, primarily, due to inhomogeneity that composite materials reinforced with carbon fibers, due tothe cutting tools geometry, their wear and due tocutting parameters that are used
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