刀具磨损过程中已加工表面质量变化的研究

Research On the Changing Rules of Quality of the Machined Surface in Tool-wearing Process

金属切削加工过程中,刀具必然会发生磨损,但刀具的磨损规律多种多样。磨损的原因也各不相同。只有找出不同切削刀具、在不同切削条件下刀具磨损与已加工表面质量的变化规律,才能为金属切削加工提供指导依据,并进一步实现对金属切削加工过程的有效控制。为此,笔者进行了硬质合金薄切削铝合金的实验。以探究硬质合金刀具磨损过程中已加工表面质量的变化规律,以及刀刃钝圆半径的变化与刀具磨损状态之间的联系。实验研究发现,刀具磨损过程中,已加工表面粗糙度、轮廓支承长度率与刀刃钝圆半径的变化规律相似。

Cutting tool wears by all means when used in metal cutting, but there are different wear rules and reasons. When having found the changing rules between quality of machined surface and cutting tool wearing in all kinds of cutting tools and cutting conditions, the rules can be used coaching metal-cutting and controlling the metal-cutting process available, Therefore, author researches on the influence of cutting tool wearing on quality of the machined surface, the relation between changing of radius of pointless round of edge of cutting tool and cutting tool wearing, when aluminum alloy be fine-cutted by Cemented Carbide, Experiment detects： there is conform changing rules between surface roughness Ra,Outllne supporting length ratio tp（c） and radius of pointless round of edge of cutting-tool rβ in tool-wearing process.