METHOD FOR PRECISE CALCULATION OF ROOT STRESS OF SPIRAL BEVEL GEARS

ＭＥＴＨＯＤＦＯＲＰＲＥＣＩＳＥＣＡＬＣＵＬＡＴＩＯＮＯＦＲＯＯＴＳＴＲＥＳＳＯＦＳＰＩＲＡＬＢＥＶＥＬＧＥＡＲＳＭＥＴＨＯＤＦＯＲＰＲＥＣＩＳＥＣＡＬＣＵＬＡＴＩＯＮＯＦＲＯＯＴＳＴＲＥＳＳＯＦＳＰＩＲＡＬＢＥＶＥＬＧＥＡＲＳＣｈｅｎＬｉａｎｇｙｕ...     

HYDRAULIC CALCULATION AND MEASUREMENT OF FLOW FIELD WITHIN INLET PASSAGE OF LARGE PUMPING STATION

ＨＹＤＲＡＵＬＩＣＣＡＬＣＵＬＡＴＩＯＮＡＮＤＭＥＡＳＵＲＥＭＥＮＴＯＦＦＬＯＷＦＩＥＬＤＷＩＴＨＩＮＩＮＬＥＴＰＡＳＳＡＧＥＯＦＬＡＲＧＥＰＵＭＰＩＮＧＳＴＡＴＩＯＮＨＹＤＲＡＵＬＩＣＣＡＬＣＵＬＡＴＩＯＮＡＮＤＭＥＡＳＵＲＥＭＥＮＴＯＦＦＬＯＷＦ...     

CALCULATIONS OF THE INNER DISTURBANCE FREQUENCIES INSIDE THE EPICYCLIC GEARING

ＣＡＬＣＵＬＡＴＩＯＮＳＯＦＴＨＥＩＮＮＥＲＤＩＳＴＵＲＢＡＮＣＥＦＲＥＱＵＥＮＣＩＥＳＩＮＳＩＤＥＴＨＥＥＰＩＣＹＣＬＩＣＧＥＡＲＩＮＧＣＡＬＣＵＬＡＴＩＯＮＳＯＦＴＨＥＩＮＮＥＲＤＩＳＴＵＲＢＡＮＣＥＦＲＥＱＵＥＮＣＩＥＳＩＮＳＩＤＥＴＨＥＥＰＩ...     

ANALYSIS OF TOOTH FORM ERROR OF EQUAL BASE CIRCLE BEVEL GEAR

ＡＮＡＬＹＳＩＳＯＦＴＯＯＴＨＦＯＲＭＥＲＲＯＲＯＦＥＱＵＡＬＢＡＳＥＣＩＲＣＬＥＢＥＶＥＬＧＥＡＲＡＮＡＬＹＳＩＳＯＦＴＯＯＴＨＦＯＲＭＥＲＲＯＲＯＦＥＱＵＡＬＢＡＳＥＣＩＲＣＬＥＢＥＶＥＬＧＥＡＲＧｏｎｇＹｕｎｐｅｎｇ；ＤｉｎｇＳｈｉｃｈａｏ；Ｃ...     

COMPUTER AIDED ANALYSIS OF FLEXI－BLE MEMBER IN CONSIDERATION OF THE EFFECTS OF DYNAMIC STI－FFEN－ING

ＣＯＭＰＵＴＥＲＡＩＤＥＤＡＮＡＬＹＳＩＳＯＦＦＬＥＸＩ－ＢＬＥＭＥＭＢＥＲＩＮＣＯＮＳＩＤＥＲＡＴＩＯＮＯＦＴＨＥＥＦＦＥＣＴＳＯＦＤＹＮＡＭＩＣＳＴＩ－ＦＦＥＮ－ＩＮＧＣＯＭＰＵＴＥＲＡＩＤＥＤＡＮＡＬＹＳＩＳＯＦＦＬＥＸＩ－ＢＬＥＭＥＭＢＥＲＩ...     

RECOGNITION OF STRUCTURAL DIAGRAM OF MACHINE TOOL SPEED CHANGE SYSTEM WITH ANY COMPOSITE RATIO

ＲＥＣＯＧＮＩＴＩＯＮＯＦＳＴＲＵＣＴＵＲＡＬＤＩＡＧＲＡＭＯＦＭＡＣＨＩＮＥＴＯＯＬＳＰＥＥＤＣＨＡＮＧＥＳＹＳＴＥＭＷＩＴＨＡＮＹＣＯＭＰＯＳＩＴＥＲＡＴＩＯＲＥＣＯＧＮＩＴＩＯＮＯＦＳＴＲＵＣＴＵＲＡＬＤＩＡＧＲＡＭＯＦＭＡＣＨＩＮＥＴＯＯＬＳ...     

FLOW FIELD ANALYSIS AND GRAPHIC CAD DURING 3─ROLL REDUCING OF THE HOLLOW TUBE

ＦＬＯＷＦＩＥＬＤＡＮＡＬＹＳＩＳＡＮＤＧＲＡＰＨＩＣＣＡＤＤＵＲＩＮＧ３─ＲＯＬＬＲＥＤＵＣＩＮＧＯＦＴＨＥＨＯＬＬＯＷＴＵＢＥＦＬＯＷＦＩＥＬＤＡＮＡＬＹＳＩＳＡＮＤＧＲＡＰＨＩＣＣＡＤＤＵＲＩＮＧ３─ＲＯＬＬＲＥＤＵＣＩＮＧＯＦＴＨＥＨＯＬＬＯ...     

STUDY ON USING SERIAL PIPE TO IMPROVE THE DYNAMIC RESPONSE OF ELECTRO－HYDRAULIC SPEED CONTROL SYSTEM

ＳＴＵＤＹＯＮＵＳＩＮＧＳＥＲＩＡＬＰＩＰＥＴＯＩＭＰＲＯＶＥＴＨＥＤＹＮＡＭＩＣＲＥＳＰＯＮＳＥＯＦＥＬＥＣＴＲＯ－ＨＹＤＲＡＵＬＩＣＳＰＥＥＤＣＯＮＴＲＯＬＳＹＳＴＥＭＳＴＵＤＹＯＮＵＳＩＮＧＳＥＲＩＡＬＰＩＰＥＴＯＩＭＰＲＯＶＥＴＨＥＤＹＮＡＭ...     

ANALYSIS SOLUTION OF BULGING CONVEXITY OF THE HYDRAULIC ELASTIC BULGING ROLL

ＡＮＡＬＹＳＩＳＳＯＬＵＴＩＯＮＯＦＢＵＬＧＩＮＧＣＯＮＶＥＸＩＴＹＯＦＴＨＥＨＹＤＲＡＵＬＩＣＥＬＡＳＴＩＣＢＵＬＧＩＮＧＲＯＬＬＡＮＡＬＹＳＩＳＳＯＬＵＴＩＯＮＯＦＢＵＬＧＩＮＧＣＯＮＶＥＸＩＴＹＯＦＴＨＥＨＹＤＲＡＵＬＩＣＥＬＡＳＴＩＣＢＵＬＧ...     

DISTRIBUTION OF REACHABLE WORKSPACE AREAS IN PHYSICAL MODEL OF THE SOLUTIONS PACE OF 2－DOFPARALLEL PLANAR MANIPULAT

ＤＩＳＴＲＩＢＵＴＩＯＮＯＦＲＥＡＣＨＡＢＬＥＷＯＲＫＳＰＡＣＥＡＲＥＡＳＩＮＰＨＹＳＩＣＡＬＭＯＤＥＬＯＦＴＨＥＳＯＬＵＴＩＯＮＳＰＡＣＥＯＦ２－ＤＯＦＰＡＲＡＬＬＥＬＰＬＡＮＡＲＭＡＮＩＰＵＬＡＴＯＲＳＤＩＳＴＲＩＢＵＴＩＯＮＯＦＲＥＡＣＨＡＢＬ...     

A manufacturing model of helical groove on rotary burr and a universal post processing method

A systematic machining theory and precision method to determine cutter location in a grinding system is presented for rotary burr. First, the helical cutting edge on various kinds of revolving surfaces is built. Then, based on the geometry model of the helical cutting edge, the smooth spiral rake surface with constant normal rake angle and flank surface can been formed during the one-pass grinding process by this method. No interference between the grinding wheel and workpiece happens by the wheel special rotation. The method has the characteristic of detaching the grinding wheel path solution from specified machining conditions. The grinding wheel path is suitable for different NC machine tools through post processing. Meanwhile, a mechanism kinematic model of the NC machine tool is built, and a generalized algorithm for post-processing of multi-axis NC machine tools is presented. This model is applied to arbitrary configuration of NC machine tool, and the motion value for each axis will be generated by the inputting structure and motion parameters of the machine tool. The model, together with the machining method mentioned in this paper, make the calculation and generation of the grinding wheel path simpler and universal. At last, the validity of the method given in the paper is identified by an example of grinding.     

基于虚拟加工技术的数控程序优化

针对传统数控程序中进给速度固定限制加工效率的缺点,开发了面向粗铣加工的数控程序优化系统。系统基于虚拟加工技术,能完成数控程序驱动下的切削过程仿真、切削力预测、碰撞检测等。系统利用粒子群进化算法,在满足加工条件的下,实现了数控程序中进给速度和主轴转速的优化,数控程序加工效率得到显著提高。     

基于多体系统理论的三坐标数控铣床几何误差建模

分析了数控机床主要误差来源和现有误差补偿技术;阐述了多体系统的拓扑结构、低序体阵列和特征矩阵的构建方法.以XK0820型三坐标数控铣床为例,运用多体系统理论建立了该机床的几何误差模型,说明了建模过程,给出了几何误差模型的具体数学表达式.     

基于OpenGL的数控成形铣齿加工过程仿真的研究

对某数控科技有限公司生产的SKXC-3000/20型高速数控铣齿机展开研究,深入分析成形法铣齿加工过程,以OpenGL和Visual C++为开发工具,开发一个数控铣齿加工虚拟仿真系统。在虚拟加工仿真系统界面中输入齿轮参数、刀具参数,经处理得到对应数控加工代码,并对代码进行检验和翻译得到加工运动数据和状态数据,由运动数据驱动虚拟机床部件的运动。通过刀具扫描体模型与离散工件模型进行布尔运算实现材料切除过程,发现铣齿加工过程中部件间的干涉碰撞等现象,有效的检验NC程序的正确性。     

用自适应预报控制方法提高数控机床加工精度

在ＤＮＣ环境下,以数控铣床曲面加工为对象,运用序后控测、自适应预报控制方法,提高了数控铣床的曲面加工精度,这种方法特别为那些实现实时有困难的加工机床。提供了一种有效的加工质量控制方法。     

基于3轴2联动数控铣床加工曲面的方法

对零件中曲面的数控加工方法进行了阐述,提出利用3轴2联动数控铣床加工曲面的可行性,结合UG软件说明自动编程的方法和注意事项,最后以实例说明了具体方法和步骤,证明了利用3轴2联动数控铣床加工曲面的可行性。     

基于3轴2联动数控铣床加工曲面的方法

对零件中曲面的数控加工方法进行了阐述,提出利用3轴2联动数控铣床加工曲面的可行性,结合UG软件说明自动编程的方法和注意事项,最后以实例说明了具体方法和步骤,证明了利用3轴2联动数控铣床加工曲面的可行性。     

五轴数控机床加工仿真技术应用

利用Vericut软件进行五轴机床铣削加工过程的仿真并进行实际加工验证。通过建立虚拟机床模型、控制系统配置、刀具库设置构建了虚拟制造系统,对零件进行虚拟加工仿真。通过Vericut的仿真不但能防止程序错误造成的机床碰撞、零件的过切欠切问题,还可以进行NC程序轨迹优化,大大缩短加工时间、提高加工效率。     

钛合金铣削过程刀具前刀面磨损解析建模

钛合金Ti6Al4V作为典型的航空航天难加工材料,在其铣削过程中硬质合金刀具的磨损会降低加工过程稳定性,进而影响加工效率和已加工表面表面质量。刀具前刀面磨损会导致刀具刃口强度降低,并影响切屑的流向和折断情况。针对前刀面磨损机理进行分析并构建了月牙洼磨损深度预测模型。首先运用解析方法构建了前刀面应力场模型,得到切屑在前刀面滑动过程中的刀具前刀面应力分布情况及磨损位置。基于刀-屑接触关系的基础上建立了前刀面温度场模型。然后,基于所得刀具前刀面应力与温度分布,构建综合考虑磨粒磨损、粘结磨损与扩散磨损的铣刀月牙洼磨损深度预测模型,获得月牙洼磨损预测曲线;结合铣刀月牙洼磨损带沿切削刃方向分布的特点,建立了随时间变化的铣刀前刀面磨损体积预测模型。最后通过试验验证了切削宽度对前刀面磨损的影响规律,预测结果与试验测量值具有较好的吻合性。结果表明随着切削宽度的增加,月牙洼磨损深度及前刀面磨损体积都随之增加。研究结果为钛合金铣削用刀具的设计和切削参数的合理选择提供了理论基础。     

发动机汽缸盖半圆槽数控铣床的研究

摩托车发动机汽缸盖安装曲轴的孔为半圆槽,其两端不通,孔径和深度精度要求高。设计专用的双主轴数控卧式铣床,用半球头铣刀经过粗、精铣削二道加工工序来加工半圆槽。合理设计铣刀的加工线路,达到减少辅助时间,提高生产效率,满足零件加工精度的要求。