發(fā)布時(shí)間：2018-06-29 09:16

  本文選題：各向同性熱解石墨 + 平行溝槽　； 參考：《機(jī)械設(shè)計(jì)與制造》2016年08期

【摘要】：采用聚晶金剛石(PCD)刀具和單晶金剛石(SCD)刀具進(jìn)行了各向同性熱解石墨切削加工試驗(yàn),對(duì)刀具磨損過程、磨損機(jī)理和表面加工質(zhì)量進(jìn)行了對(duì)比研究。通過對(duì)試驗(yàn)結(jié)果的研究分析表明:兩種刀具的磨損主要發(fā)生在后刀面,且切削刃都出現(xiàn)了微崩刃。PCD刀具后刀面上形成了平行溝槽和嚴(yán)重磨損兩種磨損形貌,SCD刀具后刀面上形成了平行溝槽和微細(xì)網(wǎng)狀兩種磨損形貌。PCD刀具的磨損機(jī)理主要磨粒磨損,SCD刀具的磨損機(jī)理則主要是解理磨損和磨粒磨損,切削過程中持續(xù)波動(dòng)的切削力是造成兩種刀具微崩刃的主要原因。雖然兩種刀具的加工表面都存在不同程度的凹坑,但與PCD刀具相比,SCD刀具具有較好且穩(wěn)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.
【作者單位】： 沈陽航空航天大學(xué)航空制造工藝數(shù)字化國(guó)防重點(diǎn)學(xué)科實(shí)驗(yàn)室;
【基金】：國(guó)防基礎(chǔ)科研計(jì)劃支持(A3520133004)
【分類號(hào)】：V263

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