期刊名称：Advances in Science and Technology Research Journal
印刷版ISSN：2080-4075
电子版ISSN：2299-8624
出版年度：2020
卷号：14
期号：4
页码：262-272
DOI：10.12913/22998624/127436
语种：English
出版社：Society of Polish Mechanical Engineers and Technicians
摘要：Owing to their excellent strength-to-weight ratio aluminium composite materials are very readily used in theconstruction of means of transport. The parts made of such materials must be characterized by high reliabilityand workmanship. Hence, machining is the predominant method of manufacturing parts from composites. Theproblem with the turning, milling and drilling of ceramic-reinforced composites is the abrasive action of the rein-forcement, resulting in heavy wear of the blades and so in lower surface quality and dimensional-shape accuracyand higher manufacturing costs. A solution to this problem can involve the blades made of superhard materials orproperly matched conditions of machining with sintered carbide blades. This paper presents the results of the turn-ing tests carried out on an aluminium composite material reinforced with long ceramic fibres. An uncoated sinteredcarbide blade is compared with a diamond coated blade and a polycrystalline diamond blade. Post-turning surfaceroughness and machining forces were selected as the main indicators of cutting ability. The effect of the blades onthe forming chips is shown and the higher resistance of the polycrystalline diamond blades to the abrasive action ofthe reinforcing fibres is confirmed by microscopic photographs. Besides the confirmation of the higher durabilityof the diamond blades, the conditions in which when using these blades one can achieve better machining effectsthan the ones achievable by the compared tools are defined. Moreover, it is shown that by properly matching themachining parameters and aiding machining with oil mist lubrication, it is possible to obtain excellent surfacequality by means of carbide blades. The minimum quantity lubrication also increases the life of the blades.
