共查询到20条相似文献,搜索用时 109 毫秒
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AcousticEmissionMonitoringofFatigueCrackGrowthinaSlenderWebofBridgeGirderYanTinghu(颜廷虎)ZhongBinglin(钟秉林)(DepartmentofMechanic... 相似文献
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LocationDataFusionBasedonGroupConsensusLiGuodong(李国栋)ChenWeinan(陈维南)(InstituteofAutomation,SoutheastUniversity,Nanjing210018... 相似文献
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ARELATIONAMONGASSOCIATIVEALGEBRAS,BIALGEBRASANDSEMIGROUPALGEBRASLiFang(李方)(DepartnientofMatheniaticsandMechanics)ARELATIONAMO... 相似文献
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EpitaxialGrowthofYSZasBuferLayersforHighTcSuperconductingFilmsonSiSubstratesQianWensheng(钱文生)LiuRong(刘融)WeiTongli(魏同立)(Milroe... 相似文献
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StressAnalysisoftheGlassBulbof35-inch(V)120°ColorPictureTubeTorongeyPeterKimanus(MoiUniversity,DepartmentofPhysics,P.O.Box390... 相似文献
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平面磨削工件的热变形及加工误差的实用计算方法 总被引:3,自引:0,他引:3
The paper submits a method to calculate thermal deformation and manufacture error in surface grinding.The author established a simplified temperature field model.and derived the thermal deformaiton of the ground workpiece,It is found that there exists not only a upwarp thermal deformation,but also a parallel expansion thermal deformation.A upwarp thermal deformation causes a concave shape error on the profile of the workpiece,and a parallel expansion thermal deformation causes a dimension error in height.The calculations of examples are given and compared with presented experiment data. 相似文献
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通过测量和分析高频感应钎焊金刚石砂轮磨削大理石过程中的磨削力,对砂轮所受的法向力和切向力进行了研究。从单颗金刚石最大切削厚度的角度。分析了磨削深度、进给速度和砂轮线速度时磨削力的影响。 相似文献
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Separate characteristic of the tangential ultrasonic vibration assisted grinding(TUAG)machining is analyzed based on TUAG process, and a critical speed formula is given to correctly set the machining parameters to insure the separate characteristics of TUAG process. The critical speed is not only related to the ultrasonic vibration amplitude and frequency, but also to the grinding wheel velocity and the cutting point space, and the grinding force can be decreased during the TUAG process with separability. Grinding force experiments are conducted, and the experimental results are in good agreement with the theoretical results. 相似文献
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张庶杰 《南宁职业技术学院学报》2005,10(2):90-92
研磨技术在主轴套筒研磨中的应用,主要包括研磨前的准备,研磨剂的选用,研磨的工艺要求,研磨的工艺特点等,要求研磨前工件和研具等应达到一定的工艺要求,必要的工艺措施是提高研磨效率保证研磨精度的关键。 相似文献
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特殊工件精密磨削是一个复杂的多变量影响过程,本文开展了精密磨削加工技术的优化研究。在利用已知加工外表面母线方程的基础上,采用了精密数控曲线磨削砂轮法向跟踪的方法,通过保证曲线轮廓上磨削点处的法线经过砂轮的回转平面,实现了砂轮与工件之间的恒定点接触,在分析砂轮与工件运动几何关系的基础上,建立了砂轮法向跟踪的数学模型,从而提高了加工精度,实现了对任意复杂曲线轮廓的磨削加工。 相似文献
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吴海勇 《闽西职业大学学报》2014,(1):106-109
选用钎焊金刚石和固定压头单颗金刚石磨粒磨削玻璃.测量了磨削速度与磨削法向力和切向力的耦合关系,以及不同磨削速度下玻璃表面质量的变化情况。研究表明,磨削法向力和切向力随着磨削速度的增加呈单调递减的趋势,磨削玻璃表面质量(划痕长宽)与磨削速度有着密切关系,划痕尺寸与磨削法向力的变化趋势一致。 相似文献
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采用270目树脂结合剂金刚石砂轮以顺磨磨削方式对火成岩质水晶进行平面磨削实验。通过测量磨削过程中的磨削垂直力和水平力,得出砂轮线速度、进给速度、磨削深度对磨削力的影响特征。实验结果表明,当提高砂轮线速度时磨削力减小,增大进给速度时磨削力增大,增大磨削深度时磨削力增大。最后对火成岩质水晶磨削力比进行讨论和分析,拟合出磨削力比Ft/Fn为0.085。 相似文献
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应用SINUMERIK 802D数控系统开发工具磨床的研究 总被引:1,自引:0,他引:1
陈兴武 《福建工程学院学报》2003,1(3):40-44
采用SINUMERIK 802D数控系统,对国产手动工具磨床进行数控改造。通过更换导轨、改进传动结构、增加计算机数控回转轴等硬件,使手动工具磨床实现数控四轴联动,加工各种复杂工具。一套简明实用的编程方法使复杂工具可以在改造后的cNc磨床上实现数控磨削加工,提高加工精度、生产效率和系统的性能/价格比。 相似文献
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The grind-hardening method suitable for external grinding is proposed in this paper and the experiments are carried out on M1432B grinding machine. The hardened layer of the workpiece with cut depth 0.3 mm and speed 0.2 m/min is analyzed. The result indicates the metallurgical structure of the hardened layer is martensite and the top hardness value is 754 HV (about 62.3 HRC). At the same time, the grinding force, one of the most important factors of external grind-hardening process is modeled, and the measurement method is provided with elastic core dampers. The measurement result shows that the values of both the tangential force and the normal force increase when the cut depth increases, and the top value is 146 N and 656 N with the cut depth value of 0.4 Era. The increment speed and the value of the normal force are larger than the tangential force. 相似文献