UG加工数据库研究与应用

提出了UG加工数据库应用的一种实用方案,通过UG内置加工数据库与刀具库存管理系统数据库的集成,实现数控编程系统与刀具库存管理系统的信息共享.在应用UG进行数控编程时,编程人员调用统一的加工数据库,包括刀具参数库、刀具材料库、加工方法库、工件材料库及切削参数库,共享加工经验,有助于提高数控编程效率以及加工合格率.     

UG加工数据库研究与应用

提出了UG加工数据库应用的一种实用方案，通过UG内置加工数据库与刀具库存管理系统数据库的集成，实现数控编程系统与刀具库存管理系统的信息共享。在应用UG进行数控编程时，编程人员调用统一的加工数据库，包括刀具参数库、刀具材料库、加工方法库、工件材料库及切削参数库，共享加工经验，有助于提高数控编程效率以及加工合格率。     

异构协同VERICUT仿真的刀具数据构建

为实现异构平台UG数控加工编程和VERICUT仿真应用,实现刀具信息的共享,提高VERICUT刀具数据构造效率,需要把UG的刀具描述库转换为以XML描述的VERICUT刀具库,分析了UG和VERICUT刀具库数据结构和特点,研究了UG刀具库和XML模式库的映射方法,以VC实现转换过程,为企业协同制造提供了技术支持。     

基于UG NX6.0的整体叶轮数控加工仿真研究

针对整体叶轮数控加工的特点和难点,本文系统地提出了基于UG NX6.0的数控加工仿真方案和步骤,应用UG NX6.0对整体叶轮进行数控加工刀具轨迹仿真,成功获得无干涉刀具轨迹、实体仿真结果和五轴数控加工的NC程序.     

基于UG的电动车后备箱盖注塑凸模CAM技术

通过电动车后箱盖注塑模具型芯的CAM加工流程,阐述了UG软件在模具加工方面的应用,具体分析了其加工工艺、刀路的设计和刀具轨迹检查过程,展示了UG软件多样化的数控加工编程策略。     

基于UG的风力推料机叶轮的多轴加工及模态分析

针对风力推料机叶轮的加工特点和使用特点,本文系统地提出了应用UG NX7.0数控加工模块对叶轮进行数控加工刀具轨迹仿真,成功获得无干涉刀具轨迹、实体仿真结果和五轴数控加工的NC程序;应用UG NX7.0的结构分析模块对叶轮进行模态分析,得到了叶轮的固有频率和振型,为叶轮的进一步优化设计提供了理论依据。     

UG软件在数控加工中的应用

通过介绍UG数控软件的应用和特点,比较了手工编程和自动编程各自的特点,特别指出自动编程在数字处理能力、生成数控程序、后置处理程序、程序自检、纠错能力强、数控系统的通讯上的优势,并着重介绍UG软件在三维建模、刀具轨迹设计、刀具轨迹编辑修改、加工仿真、后置处理、数控编程模板的应用,得出UG软件是一种非常不错的数控加工程序。     

UG/CAM数控车编程加工的关键技术及应用

首先分析UG/CAM数控车编程关键技术,论述该技术在使用中的基本流程、模版,通过粗车内外圆、精车内外圆、车槽加工、钻孔加工四个方面分析刀具轨迹生产控制方式,阐述了刀具轨迹的修改、加工仿真、切削库参数、后置处理程序开发等内容,论述UG/CAM数控车编程关键技术以及应用。     

基于VERICUT的零件虚拟仿真加工研究

在将UG软件的CAM功能与VERICUT的仿真优化功能相结合的基础上,首先建立了配备FANUC系统的虚拟三轴数控加工中心及其刀具库;其次应用UG软件建立了支座零件、虎钳工装的参数模型,并生成了刀具加工路径及数控程序;然后应用VERICUT软件真实模拟零件的加工状态,并对零件的刀具路径及加工参数进行优化;最后通过零件实际加工情况与仿真结果的比较,验证了数控仿真加工可以有效提高零件加工效率,且数控程序经优化后零件可获得更好的表面光洁度和尺寸精度。     

UG软件的CAD／CAM技术在海宝加工中的应用

应用三轴联动的数控立式铣床,基于UG软件的CAD模块,设计完成2010年上海世博会吉祥物海宝的三维曲面造型,再运用UG软件的CAM模块,合理选择各项加工参数生成刀具轨迹,调试后经后处理生成数控程序,传到数控机床上完成加工,从而大大提高加工效率,缩短了生产周期。     

基于UG的正交车铣加工回转体表面微观残留仿真

正交车铣加工的回转体表面由铣刀与工件的复合相对运动形成,其形成机理独特,多个参数影响其表面微观形貌。为研究切削参数对正交车铣回转体表面微观残留的影响,基于UG建立了正交车铣回转体表面的仿真加工方法,并通过Vericut构建了虚拟五轴车铣加工环境,由此仿真研究了周向每齿进给量对正交车铣回转体表面微观残留的影响,发现已加工表面微观残留高度随周向每齿进给量增加显著增大。     

数控加工仿真系统中刀具库的建立

介绍了在UGⅡ平台进行五坐标数控机床仿真系统二次开发过程中，如何利用UG的模块和C语言在分析归纳的基础上建立尺寸驱动的参数化模型刀具库，并通过实例阐述了该刀具库管理模块的开发过程，为进一步开发标准件库做好了准备。     

基于UG软件的齿轮指型铣刀参数化设计与编程应用

采用UG软件对指形铣刀进行参数化设计与数控加工编程,并建立模板文件;利用VB语言编写自动打开UG模板文件的应用程序;详细地介绍了使用过程,并通过实际加工验证了程序的正确性。     

在万能铣床上进行等螺旋角锥铣刀粗加工

根据等螺旋锥铣刀几何原理,提出一种借助附加装置在万能铣床上进行等螺旋角锥铣刀粗加工工艺,介绍了该方法加工锥铣刀时工作铣刀的运动方程;给出了附加装置的设计原理,通过对用此方法加工出的铣刀参数进行测试,证明了这种方法的可行性和实用性。     

球面圆角的数控铣削加工

一般铣削加工零件都有需要加工的圆角,如果圆角是XY平面内的轮廓曲线,只需利用G2/G3指令就可以加工。如果圆角位于XZ平面内,利用普通立式数控铣床及常用刀具进行圆角加工,其编程方法与常用方法不同。球面圆角的加工方法有多种多样,最常用的编程方法是手工宏指令编程和应用编程软件如MasterCAM、UG、CAXA等自动编程,通过对这两种加工方法综合讲述,对照两种编程方法的优缺点在实习和实践中灵活运用。     

A Manufacturing Model of S-Shaped Ball-Nosed Milling Cutter and Error Analysis in Realisation in Industry

The paper first discusses the reasons for studying and manufacturing ball-nosed milling cutters with S-shaped cutting edges. Then, based on prior studies, and through introducing a helicoid, it presents a new manufacturing model used to grind the rake face and flank of the cutter. The amplitude of |Δs| machined via this model is much larger than that machined via other models. A special mechanism is also presented for grinding the flank of the cutter. Furthermore, to ensure the feasibility of manufacturing a ball-nosed milling cutter, error models are studied from four main aspects and interpreted in the text in detail. The mathematical formulae of the error models are presented, and a numerical example is also presented to illustrate the effectiveness of the proposed modelling procedure. The example includes the machining data and error scale of each main parameter. Those data indicate that the proposed model and grinding procedure are capable of producing the ball-nosed milling cutters with an accuracy conforming to the user-provided specific tolerance.     

Numerical computing method of noncircular gear tooth profiles generated by shaper cutters

A simple and accurate numerical method was proposed for calculating the tooth profile of a noncircular gear. This method is directly based on the real gear shaping process, rather than deducing and solving complicated meshing equations used in the traditional method. The tooth profile is gradually obtained from the boundary produced by continuously plotting the cutter profile on the gear transverse plane. The key point of the method is picking up the graph boundaries. The relative position of the cutter profile on the gear transverse plane is determined by the given pitch line of the noncircular gear, parameters of the shaper cutter, and the shaping process data. In comparison with the traditional method, it is universal and is much more efficient and accurate, especially for noncircular gears, which have nontrivial pitch lines. Special problems in gear design and manufacturing, such as tooth pointing, undercut, and fillet interference, are included in the process. As an application example of the numerical method, a square internal gear is chosen from a new type of hydraulic motor with noncircular planetary gears, and the tooth profile of that gear is computed. The gear is successfully machined by electromagnetic discharge (EMD) using the resulting data.     

An analysis of cutting-edge curves and machining performance in the Inconel 718 machining process

When considering the machining of materials used for aircraft components, the principal areas of interest usually include the manufacturing characteristics of the materials when they are machined with different cutting-edge curves, and the development of manufacturing processes that improve the machining precision, thereby reducing the time required to carry out secondary machining operations or error correction of the final component. A further area of concern is to develop manufacturing techniques that are capable of generating highly reliable aircraft components which ensure that flight safety is not compromised through component failure. This paper employs a Taguchi L9 experimental layout to investigate the optimal cutting parameters when machining Inconel 718 with the planar-type conical ball-end cutter, the S-type cutter, and the traditional conical ball-end milling cutter. The current results provide a valuable technical database for aircraft component manufacturers who are seeking to enhance their automatic manufacturing capabilities.     

快速成型技术工艺特点及影响精度的因素

快速成型是一种基于离散堆积成型思想的数字化成形技术,可以在无需任何模具、刀具和工装的情况下,直接从CAD数据,快速制造出具有任意复杂形状的实体部件。介绍了快速成型领域四种典型的成型技术及其加工原理,阐述了其加工过程中所具备的快速性和高度柔性等现代化制造特点。比较了典型快速成型工艺的适用领域、加工成本和技术参数,找出影响成品精度的工艺及设备方面因素。分析各种成型技术在成形精度、表面质量、材料成本等方面的优点和缺点。