The Optimization Of Cutting Process On Carbon Fiber Composite Materials

Carbon fiber composite materials have high strength, light quality, good abrasion resistance,corrosion resistance and fatigue resistance ability and also the superior material function. It waswidely applied in the field of atomic energy and new technology industry, also applied in thecivilian products, such as sports equipment, agricultural machinery and medical equipment.It hashigh strength of layered structure, obvious anisotropy, the high strength of the fiber axis directionand the differences in the structure characteristics of metal materials,which makes cutting toolswearing fast and producing the defects such as delamination and tearing.However, the studies ofcutting processing on carbon fiber composite material is still in its initial stage, it was limited tothe basic research such as cutting mechanism, mechanism of tool wear, which makes theresearch results cannot be directly used in the practical production. The cutting parameters andprocess design of carbon fiber composite material lack of optimization,because it was mainlybased on personal experience, which directly affects cutting quality, cutting efficiency andcutting cost.Therefore, optimization of cutting process on carbon fiber composite material hasimportant application value and practical significance.The topic of this paper is “the optimization of cutting process on carbon fiber compositematerials”.This paper improved the cutting theory and wear principle of carbon fiber compositematerial,also analyzed the influence of dosage on cutting tool materials, and the wearperformance of milling tool, the influence law of workpiece machining quality is alsoresearched. The purpose is to explore the best milling process on improving the quality of carbonfiber composite material and the life of milling tool, and to provide theoretical guidance andapplication.Its main contents are as follows:1.Using cemented carbide cutting tools and CVD diamond film coated tools to cut carbonfiber composite material, through the single factor experiment, studied the uncoated tool, coatedtool wear mechanism and the cutting parameter to the influence of tool wear.The experimentresult indicated: from the two kinds of cutting tools, the main wear form is cutters wear andmain wear mechanism is abrasive wear, but the uncoated cemented carbide cutter tool hasbreakage phenomenon;Cutting rate and turning back knife surface after the tool wear effect ismore obvious;Compared with uncoated CVD diamond film coated cemented carbide cutter, wearof flank surface of cutting tool is between2.3~3.8times, from the cutting tool wear resistance, CVD diamond film coated cemented carbide milling cutter can be used for carbon fibercomposite materials production and processing.2.Studied by orthogonal experiment, the coated cutting tool and not coated impact thequality of processing and the optimum combination of cutting parameters. The results show that,under the same conditions, the burrs generated from coated tool milling carbon fiber reinforcedplastics are short and thin. And the burrs generated from uncoated tool milling process are longand thick; The interaction between cutting rate and feed rate had significant impact on the flankwear of CVD diamond coated tool, and the factors affecting flank wear in a descending order as:interaction, feed rate, spindle speed, cutting width. However cutting parameters have notremarkable effect on the flank wear of uncoated tool.3.Through optimal parameter combination, the orthogonal experiment was used to studyservice life of the coated and not coated cutters, the blade wear and processing quality ofworkpiece. The results show that, CVD diamond coated tool life is7.5times as uncoated tool;Tool life affects machining quality directly. The size and dispersion of burrs are proportional tothe width of flank wear. CVD diamond coat can prevent chemical wear and diffusion wear, theflank face wear slow and steady. In the actual application, considering machining quality,economy and machining efficiency of carbon fiber reinforced plastic, when milling length ofuncoated and coated tool arrives at5.4m and40.5m respectively, should inspect tool wear intime.