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ID:32706455
大小:1.74 MB
页数:57页
时间:2019-02-14
《石英玻璃elid磨削表面质量研究》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、摘要本文是采用ELID磨削(ElectrolyticIn-ProcessDressing,ELID)方法对石英玻璃进行塑性加工的研究。采用ELID磨削工艺提高了加工精度、降低了表面粗糙度。实验用GM73.III型平面切入磨床,采用铸铁短纤维结合剂金刚石砂轮,配合在线电解修整,经过对电解电流、砂轮转速、进给量等工艺参数的条件实验及优化,加工出高精度、低粗糙度的石英玻璃;研究了砂轮转速、进给量等工艺参数对石英玻璃表面粗糙度的影响;采用原子力显微镜(AtomicForceMicroscope,AFM)对石英玻璃磨削表面进行了形貌分析,利用表面光度仪(xP-2⋯)测量石英玻璃磨削表面的粗糙度,用JD2
2、2型数字式立式测长仪测定了石英玻璃磨削表面的平整度,探讨了微观磨削机理及石英玻璃的磨削加工塑性域。分析结果表明,本实验中在砂轮结合剂中加入稀土氧化物Ce02后,砂轮孔隙减少,显微组织细化,金属结合剂与金刚石颗粒的结合性能得到了明显改善,提高了结合剂对金刚石颗粒的把持能力,从而增强其磨削性能。在本实验条件下对砂轮进行电解的参数为:占空比50%,频率5000Hz,电压为4.6V。砂轮被电解后在表面留下一层四氧化三铁,阻止了电解的过度进行。使用ELID磨削石英玻璃表面,其表面粗糙度随着砂轮进给量的减少而降低,表面粗糙度随砂轮转速的增加先降低后提高。在本实验中,用W5砂轮在转速为2060rpm,进给量
3、为1Ixm时,石英玻璃处于塑性磨削模式,且获得的石英玻璃表面粗糙度为14.8nm。关键词ELI/)磨削;石英玻璃:塑性域;进给量;砂轮转速燕山大学工学硕士学位论文AbstractInthispaper,theElectrolyticIn—ProcessDressing(ELID)forquartzglassinductileregionhasbeenstudied.ELIDtechnologyCallireprovethemachiningprecisionandreducetheroughnessoftheglass.Thequartzglasswithhighprecisionandlow
4、roughnesshasbeenmadebyusingdiamondgrindingwheelbondedbyshortcastironfibersandGM73-IIIsurfacegrindingmachine.Thequartzglasshadbeenfixedonbatholithsbymeltingolefinduringtheprocess.Thetechnologicalparameterssuchaselectrolysiscurrent,therotationspeedofgrindingwheelandthefeedrateetc,havebeenoptimized.The
5、effectoftherotationspeedofthegrindingwheelandthefeedratehasbeenresearched.ThegrindingsurfaceofquartzglasshasbeenobservedandanalyzedbyXP.2ⅢandAFM.TheflatnessofsamplehasbeenmeasuredbyJD22.Thegrindingmechanisminmicrocosmicandtheductileregionofquartzglasshasbeendiscussed.Theexperimentalresultsshow也atthe
6、grindingwheelholedecreaseanditsconfigurationbecometightnessaftertheCe02hasbeenjoinedintothegrindingwheel.Thecombinativeperformancebetweenthebodyofgrindingwheelanddiamondwasimproved.Inthispapergrindingwheelhasbeenelectrolyzedindifferentconditions.Thebestparameterisdutycycleof50%,frequencyof5000Hzandt
7、ensionof4.6VAnatoxideofFe304hasbeenleftOllthesurfaceofgrindingwheelthatcallpreventtheexcessiveelectrolyte.Theroughnessofsurfaceimproveswiththeincreasingoffeedrate.Thesurfaceroughnessfirstdecreasesandt
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