金刚石与磨料磨具工程
金剛石與磨料磨具工程
금강석여마료마구공정
DIAMOND & ABRASIVES ENGINNERING
2015年
1期
48-53
,共6页
聚晶立方氮化硼刀具%电火花放电磨削%放电加工参数%材料去除量%工件表面粗糙度
聚晶立方氮化硼刀具%電火花放電磨削%放電加工參數%材料去除量%工件錶麵粗糙度
취정립방담화붕도구%전화화방전마삭%방전가공삼수%재료거제량%공건표면조조도
polycrystalline cubic boron nitride cutting tool%electrical discharge grinding%electrical discharge machining parameter%material removal volume%workpiece surface roughness
以国产不同粒度的聚晶立方氮化硼复合片试样作为研究对象，选取电极转速、开路电压、峰值电流、脉冲宽度和脉冲间隔作为主要工艺参数，以材料去除量、电极损耗作为加工效率的评价指标，以试样表面粗糙度值作为加工质量评价标准，结合扫描电镜观测、能谱分析、粗糙度仪测试，分析主要工艺参数对放电磨削加工的影响。实验结果表明：研究表明：PCBN 电火花放电磨削加工的机理是高温熔化黏结剂，从而导致聚晶立方氮化硼颗粒脱落而实现磨削去除，过程中还伴随着元素间的置换和氧化；PCBN 粒度对电火花放电磨削加工效率和质量的影响不如放电加工工艺参数的影响显著；材料去除量、电极损耗随着电极旋转速度的增加、开路电压的增大均有不同幅度的增加；随着峰值电流的增加，材料去除量增加，电极损耗减小，工件材料的表面粗糙度值增大。
以國產不同粒度的聚晶立方氮化硼複閤片試樣作為研究對象，選取電極轉速、開路電壓、峰值電流、脈遲寬度和脈遲間隔作為主要工藝參數，以材料去除量、電極損耗作為加工效率的評價指標，以試樣錶麵粗糙度值作為加工質量評價標準，結閤掃描電鏡觀測、能譜分析、粗糙度儀測試，分析主要工藝參數對放電磨削加工的影響。實驗結果錶明：研究錶明：PCBN 電火花放電磨削加工的機理是高溫鎔化黏結劑，從而導緻聚晶立方氮化硼顆粒脫落而實現磨削去除，過程中還伴隨著元素間的置換和氧化；PCBN 粒度對電火花放電磨削加工效率和質量的影響不如放電加工工藝參數的影響顯著；材料去除量、電極損耗隨著電極鏇轉速度的增加、開路電壓的增大均有不同幅度的增加；隨著峰值電流的增加，材料去除量增加，電極損耗減小，工件材料的錶麵粗糙度值增大。
이국산불동립도적취정립방담화붕복합편시양작위연구대상，선취전겁전속、개로전압、봉치전류、맥충관도화맥충간격작위주요공예삼수，이재료거제량、전겁손모작위가공효솔적평개지표，이시양표면조조도치작위가공질량평개표준，결합소묘전경관측、능보분석、조조도의측시，분석주요공예삼수대방전마삭가공적영향。실험결과표명：연구표명：PCBN 전화화방전마삭가공적궤리시고온용화점결제，종이도치취정립방담화붕과립탈락이실현마삭거제，과정중환반수착원소간적치환화양화；PCBN 립도대전화화방전마삭가공효솔화질량적영향불여방전가공공예삼수적영향현저；재료거제량、전겁손모수착전겁선전속도적증가、개로전압적증대균유불동폭도적증가；수착봉치전류적증가，재료거제량증가，전겁손모감소，공건재료적표면조조도치증대。
Polycrystalline cubic boron nitride (PCBN) compact samples with different grain size are processed.Electrode running speed,open-circuit voltage,peak current,pulse width and pulse interval were selected as the main process parameters.The material removal volume and electrode loss were set as the evaluation index of production efficiency;workpiece surface roughness value was set as evaluation standard of processing quality.By electrical discharge grinding experiments,combined with scanning electron microscopy observation,energy spectrum analyzer and roughness tester,the influences of main process parameters on electrical discharge grinding were analyzed.So were polycrystalline cubic boron nitride compact electrical discharge grinding technics & mechanism.The research indicated that PCBN machining in EDG process was to melt bond at high temperatures,which resulted in PCBN particles falling off and realized material removal.This process was accompanied by element replacement and oxidation.PCBN particle size has less effect on efficiency and quality of electrical discharge grinding than electrical discharge process parameters.With the increase of the electrode rotation speed or open-circuit voltage,material removal volume of the workpiece and electrode loss both increased.With the increase of the peak current, material removal volume and surface roughness value of workpiece increased,but electrode loss decreased.
