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Katsuo Syoji 《机械工程学报(英文版)》2004,17(1)
In order to resolve the problems of machining non-axisymmetric aspheric lens, which is short of flexibility in mould grinding and needs high accuracy CNC machine center in globe diamond wheel grinding, a new parallel grinding method that utilizes common arc diamond wheel is put forward. Base on the approach calculation of machining locus, the advantages of parallel grinding that machines non-axisymmetric aspheric lens by 2.5-axis CNC machine center have been obtained. The results of grinding experiment show the new method can meet the need of grinding high accuracy non-axisymmetric aspheric lens. 相似文献
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GuoYinbiao ChenBingkui ZhangYi KatsuoSyoji 《机械工程学报(英文版)》2004,17(1):149-151
In order to resolve the problems of machining non-axisymmetric aspheric lens,which is short of flexibility in mould grinding and needs high accuracy CNC machine center in globe diamond wheel grinding,a new parallel grinding method that utilizes common arc diamond wheel is put forward.Base on the approach calculation of machining locus,the advantages of parallel grinding that machines non-axisymmetric aspheric lens by 2.5-axis CNC machine center have been obtained.The results of grinding experiment show the new method can meet the need of grinding high accuracy non-axisymmetric aspheric lens. 相似文献
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马格磨齿机的生产效率问题长期为人们所注目,近年在理论研究方面有很大进展,使该机床的工作效率大为提高。本文提出的无超程磨齿法实用于砂轮的V安装方式和H安装方式,在H安装方式中与已曾提出的K磨削法及乐兑谦磨削法的基本区别是:采用同一磨削角的相同齿轮,本法按磨削节圆设计滚筒,而K磨削法及乐兑谦磨削法则按磨削基圆设计滚筒,前者不产生齿形畸变现象,而后者的齿形畸变是借助机床的B机构(修形机构)补偿的,因此,本方法有齿形精度高,实施简单等特点。 相似文献
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快速点磨削周边磨削层模型及参数 总被引:3,自引:1,他引:2
为深入研究快速点磨削机理及工艺,根据快速点磨削的技术与几何学特征,建立点磨削周边接触层及参数的数学模型,对砂轮和工件的等效速度和直径、磨削参数进行理论分析。在已建立快速点磨削接触层及参数的理论模型基础上,推证计及点磨削变量角度和磨削深度的砂轮周边理论接触宽度的计算公式,并对超薄快速点磨 削砂轮周边理论接触宽度和表面粗糙度进行数值仿真。结果表明:与普通外圆磨削不同,砂轮周边与工件实际接触宽度并不恒等于砂轮宽度,点磨削变量角度和磨削深度显著影响砂轮周边的实际接触宽度与工件表面粗糙度 数值。 相似文献
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W.B. Rowe 《Precision Engineering》1979,1(2):75-84
Machine stiffness, geometrical setting, resonances and forced vibrations have a strong influence on the accuracy and productivity of the grinding process. This is particularly true of centreless grinding, where accuracy can vary between opposite extremes. This paper summarises the results of a long experimental and analytical programme on centreless grinding: results are given for variations in roundness with geometrical settings, the influence of machine stiffness on accuracy, sizing and productivity, and the use of geometric stability charts for setting speeds. Pointers for future research and possible progress towards increased accuacy andproductivity are given, and some basic principles for machine design discussed. 相似文献
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yA7232A 型蜗杆砂轮磨齿机采用电子挂轮技术,磨削斜齿轮时采用无差动形式,具有一定特色,本文从提高磨齿精度出发,重点论述无差动磨齿原理及齿面构形原理,并简述了机床传动系统及概况。首先研究了转动速以及轴线移动速比方程,若要磨出所需要的斜齿轮,必须同时满足上述方程。斜齿轮工件齿是由接触带沿直母线方向铺开形成。进而研究了规则啮合与标准啮合对磨齿精度的影响。经分析指出蜗杆砂轮轴系精度,砂轮螺距精度及机床总传动链精度是影响磨齿精度的主要因素。从而提出改进结构,保证精度的措施,并取得显著效果。目前磨削直齿轮精度可达JB179-81标准四~五级,稳定在五级,斜齿轮精度为六级,可以满足国内建设的需要。 相似文献
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基于PC+单片机的主从式控制和模块化设计方法,对Y7125磨齿机的砂轮修整系统进行了数控改造。该系统具有自动生成加工程序、模拟图形显示、实时插补等功能,可简化修形编程,提高齿轮刀具制造精度和生产效率。 相似文献
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An approach for simulation and production implementation of thru-feed centerless grinding of transformation toughened zirconia using vitreous bond diamond grinding wheels is presented. A set of grinding tests was designed and conducted to identify the effects of abrasive product (diamond grit size), work-material, and operational factors (stock removal, thru-feed rate, number of thru-feed passes and truing and dressing methods) on grinding performance. Evaluation parameters of surface finish, grinding forces and C-ratio were utilized to determine machine tool features. Very fine surface finishes, in the order of 0.05 to 0.1 u.m Ra range, could be achieved using vitreous bond micro-grit diamond wheels, without additional part processing. Such a level of surface finish on ground ceramics has traditionally been generated only by using resinoid bonded diamond wheels. These test results were used to design and manufacture a full-size composite or sandwiched diamond grinding wheel. This grinding wheel has been successfully applied in high-volume ceramic production, which in turn has verified the proposed approach. Lastly, the surface finish data is interpreted based on SEM and AFM observations and materials properties. 相似文献
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0INTROD[JCTIONAbrasivebeltgrindinghasbeenutilizedextensivelyasahigh-efficiencygrindingmethod,especially,ithasmoreadVantagesonnonfermusmetalgrinding['].ComparingwithcommongrindingWheel,itsgrindingefficiencyishighanditsbandingtemperatureislow.Studiesinconnectionwiththismethodincludingseveralaspectsasfollowing:H.Ki.[Zjobtainedthebeltwearprincipleandmeasuredthedistributionofnormalandtangentialforcesbysimulatingbandingconditions;S.HigIJchi[3]presentedamethodwhichachievedhighbandingefficienc… 相似文献
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基于微定位工作台的精密磨削过程动力学建模与误差补偿技术 总被引:2,自引:0,他引:2
为了消除传统平面磨床砂轮振动对加工精度的影响,提出了采用自行设计的纳米级微定位工作台进行在线动态补偿的方法。为了对平面磨床的动平台上安装有微定位工作台的新型机床磨削过程的特性进行研究,分析了磨头-砂轮-微定位工作台组成系统的动力学行为。运用模态综合理论和拉格朗日方程建立了磨削过程模态坐标下的动力学模型,并利用状态空间方法得到了磨床在模态坐标下振动响应的数值计算公式。由振型叠加原理,得到具有微定位工作台补偿装置的新型平面磨床在物理坐标下的响应。在此基础上分析了磨床系统的动态特性和补偿前后的加工精度。仿真结果表明,采用微定位工作台进行在线振动补偿,可有效地提高加工工件的表面质量。 相似文献
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降低齿轮齿距累积偏差的方法 总被引:1,自引:1,他引:1
为了减小齿轮磨削加工中的磨床系统分度误差,提高齿轮加工精度,分析了齿轮磨床分度误差、齿轮安装偏心和齿轮齿距偏差之间的关系,获得了分度误差的计算方法,并计算出了齿轮磨床的分度误差。依据计算得到的分度误差值调整磨床,降低磨床分度误差,减小齿轮齿距累积偏差,提高了齿轮加工精度。以Y7125大平面砂轮磨齿机床为例验证了提出方法的可行性。建立了齿轮安装偏心和齿廓偏差的数学模型,求出了齿轮安装偏心的幅值和相位角,然后由齿轮安装偏心、磨床分度误差和齿轮齿距偏差的关系得到磨床的分度误差值。根据计算得到的分度误差值调整磨床分度盘,使磨床的分度误差从17.7μm减少为3.3μm,被加工齿轮的齿距累积总偏差由46.9μm降低到11.5μm,齿距精度达到三级。验证结果表明,按照这种方法调整磨床可以快速有效地降低磨床的系统分度误差,从而降低齿轮的齿距累积偏差。 相似文献