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在制造纤维强化塑料部件时,通常要对已硬化的层压板进行后序切削加工,尤其是外形铣削和钻孔。纤维强化塑料由于其非均质结构以及所含纤维的特性,对刀具提出了特殊的要求。加工玻璃纤维和碳素纤维层压板时,要求刀具有很高的耐磨性;加工芳香族聚酰胺纤维层压板时,则要求刀具具有较锋利的刀刃和特殊的刀刃几何形状,因此必须采用相应的刀具来获得满意的加工效果。在加工玻璃和碳素纤维强化塑料时,应采用镶聚晶金刚石刀片的麻花钻、整体硬质合金铣刀以及聚晶金刚石铣刀。加工芳香族聚酰胺纤维层压板时,应采用在同一把刀上具有左和右旋螺旋齿的硬质合金铣刀以及切削刃在外圆上凸起的硬质合金钻头。除了刀具以外,切削参数对加工结果也有重要的影响。
In the manufacture of fiber-reinforced plastic parts, hardened laminates are usually subjected to subsequent machining, in particular profile milling and drilling. Due to their heterogeneous structure and the characteristics of the fibers they contain, the fiber-reinforced plastics place special demands on the tool. Processing of glass fiber and carbon fiber laminates, require high wear resistance of the knife; processing aramid fiber laminate, the tool requires a sharp blade and a special cutting edge geometry, it is necessary to adopt the corresponding The tool to get satisfactory processing results. In the processing of glass and carbon fiber reinforced plastics, diamond polycrystalline diamond inserts should be used twist drill, solid carbide cutter and polycrystalline diamond cutter. For the processing of aramid fiber laminates, cemented carbide drills with a left-hand and right-hand helical tooth on the same tool and a cutting edge raised on the outside should be used. In addition to the tool, cutting parameters also have a significant effect on the machining result.