基于UG MoldWizard软件注塑模分型面设计初探

注塑模具分型面设计是模具设计中的重要部分,首先介绍模具分型面的选择原则,通过典型案例介绍UGMoldWizard四种分型面的创建方法.提出注塑模分型面设计的关键是判斯创建的分型线是否在同一个平面或是曲面内,再采用相应创建曲面的方法创建分型面.目的是为类似注塑件分型面的创建提供参考.     

基于Pro/E利用自动分型面技术创建模具型腔研究

简要介绍了Pro/E自动分型面技术,详细介绍了自动分型面形成操作步骤,并成功利用分型面创建了模具型腔;对分型面作了简要分析,利用自动分型面技术可以快速而准确的创建分型面,提高了设计效率.     

A new integrated polishing process design for plastic mold steel to mirror-like surface

This paper aims to propose the design of a new polishing tool, a clamp with a flexible polishing head (or CFPH) for polishing plastic mold steel. The investigation/evaluation of this new tool’s performance in polishing is also included in this paper. The design of this brand new flexible clamp with a polishing head is, first of all, based on the application of the concept of weakening gap in the study of Fuh [1] increase in the freedom of micro-movement of the clamp is available. Second, various analyses and tests are done by the finite element method (FEM). Then, through the spectrogram, we analyze this tool’s machining characteristics. Furthermore, by the performance on large waves, medium waves, and small waves of the workpiece, we evaluate the working efficiency and set up a set of polishing strategies. This module of machining strategy process contains the combination of cutting and polishing one kind or multi-kind machining modes and the complementary precision processing methods. Finally, we propose a set of polishing integration process skills specifically on S-STAR*. We also verify our analysis with 3D profiles and the surface roughness measurement instrument. These verified analyses show that roughness and shape precision can be reached to Ra0.006, Rmax0.08, and PV0.084 μm respectively. This new invention, by the spectrum analysis, can significantly improve large wavelength accuracy up to 83.9 %, medium wavelength accuracy 82.5 %, and small wavelength accuracy 80.2 %. To conclude, we aim to set up a mirror-like surface polishing tool for plastic mold steel. This proposal is prudentially verified and should be considered theoretically and practically successful.     

Algorithm for automatic undercut recognition and lifter design

When having internal undercut in the ejection direction, the finished plastic product cannot be directly removed from the mold. Through lifter design, during the ejection process, the lifter can eject products in the upward direction and make lateral movements to successfully leave the undercut location to part from the mold. Under the framework of CAD software, this study developed the undercut feature recognition, integrated the mold design, and automated lifter production. Based on the geometric relationship of the internal undercut surface, edge, and point of the product model, this study summarized a set of recognition rules. Through computer programming calculation and judgment, the proposed method can automatically recognize undercuts to reduce the labeling time at the conceptual design stage and record the undercut width and length in feature parameters. At the mold design stage, through the acquisition and calculation of its parameters, it can automatically produce a suitable lifter during the architecture of the web-based mold design navigation process. Through standardized design process, it can reduce 90 % of mouse clicks and design time to guide users to quickly complete the design, while reducing design errors to improve working efficiency by the automatic integration function.     

中小型注塑模企业模具设计与加工的流程设计

给出了中小型注塑模企业模具设计与加工的一般流程,提出了一种运用UG和Auto-CAD两软件相结合进行模具设计与加工的简捷方法.     

网格曲面数控加工编程分型线提取算法

针对复杂网格曲面分型线提取精度和效率不高的问题,根据非封闭自由曲面和封闭自由曲面的拓扑信息和几何特点,提出了2种基于投影方法的分型线提取算法. 对非封闭模型,首先将模型投影到平面并重新三角网格化,然后提取投影三角网格的边界,最后以平面三角网格的边界为检索信息在原始网格中检索得到自由曲面的分型线. 对封闭模型,根据模具分模的几何原理,提出通过建立封闭自由曲面凹模和凸模离散几何模型的方法提取封闭自由曲面的分型点,然后通过一环邻域点搜索法对分型点排序,得到分型线. 实验结果和数据分析表明,两种方法可以精确、高效地提取非封闭和封闭自由曲面的分型线,并可以确保分型点都是三角网格曲面的顶点.     

染整工艺碱液的自动配制系统设计

本文主要介绍了染整工艺所需浓度碱液的自动配制系统，通过对欧姆龙C200HG型PLC软件的设计，集中控制浓、淡碱的流量比以及各储液罐的液位。实现变频器的参数设置、故障诊断和电机的启动和停止，进而达到自动精确配液，及时输送的目的。此系统工艺简单。可操作性强，能达到企业节能降耗的目的，并能带来良好的环境效益和经济效益。     

基于RE的复杂曲面零件模具的快速设计与制造

随着现代计算机技术和测试技术的发展,利用逆向工程技术对产品进行建模、仿真、优化及新产品开发成为现代设计的一大热点,并已成为CAD/CAM领域特别是模具设计和制造的重要技术之一。以油壶切边模为例,采用逆向工程技术通过实物原型获取了油壶的三维轮廓数据,然后利用Pro/E等软件将得到的轮廓数据三维重构,得到了实物原型的三维数字模型,实现了油壶切边模具的设计与制造。采用逆向工程技术可以快速实现模具的设计与制造,大大缩短产品设计周期,提高产品竞争力。     

数据接口零件冲压工艺及模具设计研究

针对数据接口冲压零件批量大、尺寸小,尺寸精度和形位公差要求高的特点,设计了合理的排样图及模具结构图,分析了冲压生产该零件可能产生带料扭曲、带料扇形变形和零件间间距不均等缺陷的原因,并找到了相应的解决措施。     

电器支架冲压工艺及模具设计研究

针对电器支架批量大、尺寸小、尺寸和形位公差要求高的情况,设计合理的排样图及模具结构,分析冲压生产该支架可能产生的带料扭曲变形、2-φ1.6 ±0.05mm孔位置尺寸精度难以保证,以及冲裁不完全或断面重复冲裁等缺陷的产生原因,并找到了相应的解决措施.     

Design of automatic parting in calibrator CAD for plastic profile extrusion dies via feature recognitions

A method to deal with the design of automatic parting in calibrator computer-aided design (CAD) for plastic profile extrusion dies via feature recognitions is presented. An integral design method to design all the calibrator plates simultaneously is presented. The approach to automatic parting in calibrators is proposed. For a given calibrator integral plate, the positions of calibrators’ parting faces are identified automatically based on recognitions of the visibility, attribute adjacent graphs of calibrator cavity surfaces. To meet the machining process requirements of calibrators, a parting process to achieve the final position of the calibrator parting faces is presented. A case study is presented to validate the proposed methodology.     

Effect of convex surface splicing characteristics of mold on the machining error in milling process

Journal of Mechanical Science and Technology - Most of the molds of automobile panels are spliced with insert-type modules. Sudden variations in load and impact vibration can occur while processing...     

基于SOA的业务流程管理在模具协同设计任务管理中的应用

为了实现模具设计任务的自动管理,结合模具设计任务的特点,提出了基于活动树的任务分解模型.该模型能最大程度地避免任务间冲突的发生,并且能够保证模具设计人员之间模型信息的一致.在此模型的基础上,结合业务流程管理技术开发出了一套模具协同设计任务管理原型系统.该系统提高了模具协同设计的自动化程度,实现了模具设计任务的自动管理.     

熔炼热风炉自动控制系统的设计与应用

提出了熔炼热风炉自动控制系统的设计方案,介绍了系统的组成和控制策略。设计了一种模糊PID控制器,提高了鼓风炉的风口区温度控制的稳定性。系统保证了有色金属的高回收率,达到了减排增效的目的,具有较高的经济效应和实用价值。     

铸件表面缺陷自动化检测设备的系统设计

铸件成形后会在表面形成砂眼和裂纹等表面缺陷,而传统的铸件表面缺陷检测方法为人工通过肉眼检测,这种检测手段效率低、易受工人的主观情绪影响,已不适应现代化的大规模自动化生产,因此开发出一套自动化检测设备,完成对铸件的表面缺陷检测具有很重大的现实意义,本文采用的检测方法为机器视觉检测,分析机器视觉检测设备的系统组成,简述系统的工作原理,重点研究系统的硬件设计和软件设计,完成主要硬件的选型和参数计算,并利用Matlab软件对缺陷样本处理分析。     

基于型值点拟合的非均匀有理B样条曲线曲面延拓算法

提出了一种用于非均匀有理B样条曲线曲面延拓的算法,采用＂先离后合＂的思想,首先对需要延拓的非均匀有理B样条基线进行分析,构造出一系列的基线型值点;然后将延拓点加入到型值点序列中,再对新的型值点序列进行插值,创建出延拓曲线;最后对生成的延拓曲线的控制顶点序列进行优化操作,以保证所创建的延拓曲线拥有最佳的几何数据结构,从而为下一次延拓打下坚实的基础。算法通过在型值点构造过程中调节容差检验值,使得延拓操作能够适应任意精度的运算场合,从而在运算速度与精度之间达到最佳平衡。讨论了非均匀有理B样条曲线曲面延拓的几种不同形式,以及相应延拓点的计算方式,并给出了运用该算法的运行结果。     

碱回收燃烧工段自动控制系统的设计及应用

介绍了碱回收燃烧工段的工艺流程,完成了黑液调节、送引风、锅炉供水、燃烧过程控制及连锁保护等子系统的设计及其软硬件实现,并将变频器运用于其中,既可以很细微地调节送、引风量,又有显著的节能效果,极大地降低了运行成本.     

A collaborative navigation system for concurrent mold design

As products become ever more diversified, their life cycles are becoming shorter. To reduce production costs, increased process automation and concurrent design are priorities. Therefore, a collaborative integrated design system is crucial in the mold design and manufacturing process. This research develops a collaborative navigation system for concurrent mold design within the computer-aided design (CAD) browser, using Pro/Web.Link as the core tool. Providing both concurrent engineering and collaborative design functions, the navigation system is capable of assisting designers in accomplishing 3D mold development efficiently and accurately with the help of the standard component library and design decision-making system. The results show significant time savings over other mold design process methodologies.     

基于TCL语言的CAE流程自动化系统设计

本文对TCL语言在HyperWorks有限元模拟流程自动化方面进行了研究。结合企业的实际,开发了针对汽车检具底座动态、静态分析以及尺寸优化的标准流程。结果表明,针对企业工作特点开发的自动化流程用来自动完成一些CAE分析工作,可以大幅度提升工作效率,同时减少人工参与,降低出错概率。