PCD和SCD刀具车削各向同性热解石墨时的性能对比

发布时间：2018-06-29 09:16

本文选题：各向同性热解石墨 + 平行沟槽　；参考：《机械设计与制造》2016年08期

【摘要】：采用聚晶金刚石(PCD)刀具和单晶金刚石(SCD)刀具进行了各向同性热解石墨切削加工试验,对刀具磨损过程、磨损机理和表面加工质量进行了对比研究。通过对试验结果的研究分析表明:两种刀具的磨损主要发生在后刀面,且切削刃都出现了微崩刃。PCD刀具后刀面上形成了平行沟槽和严重磨损两种磨损形貌,SCD刀具后刀面上形成了平行沟槽和微细网状两种磨损形貌。PCD刀具的磨损机理主要磨粒磨损,SCD刀具的磨损机理则主要是解理磨损和磨粒磨损,切削过程中持续波动的切削力是造成两种刀具微崩刃的主要原因。虽然两种刀具的加工表面都存在不同程度的凹坑,但与PCD刀具相比,SCD刀具具有较好且稳定的加工性能。
[Abstract]:The cutting experiments of isotropic pyrolytic graphite with polycrystalline diamond (PCD) and single crystal diamond (SCD) tools were carried out. The wear process, wear mechanism and surface machining quality of the tool were compared and studied. The analysis of the experimental results shows that the wear of the two kinds of cutting tools mainly occurs on the rear side of the tool. There are two kinds of wear morphologies on the cutting edge: parallel groove and severe wear. Parallel groove and fine mesh are formed on the cutting edge. The main wear mechanism of PCD tool is the following two kinds of wear patterns: parallel groove and fine mesh. The wear mechanism of the PCD tool is the same as that of the SCD cutting tool. The main wear mechanism of the PCD tool is as follows: parallel groove and fine mesh. The wear mechanism of SCD tool is mainly cleavage wear and abrasive wear. The continuous fluctuation of cutting force is the main cause of the two kinds of cutting tools. Although the machined surfaces of the two kinds of cutting tools have different degrees of pits, the SCD cutting tools have better and more stable machining performance than PCD cutting tools.
【作者单位】：沈阳航空航天大学航空制造工艺数字化国防重点学科实验室;
【基金】：国防基础科研计划支持(A3520133004)
【分类号】：V263

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