全钢轮胎模具花纹筋成形工艺分析与研究

全钢轮胎模具花纹块上的窄筋(花纹筋)用来成形胎面细小沟槽.通过对窄筋加工分析,对电火花成形不同形式的花纹块窄筋的成形方式、加工工艺、电极划分及钢片加工等方面进行了阐述,得出一些经验性的结论.     

电火花加工铝花纹块工艺技术的应用

铝花纹块的硫化膨胀量是决定合模后的花纹圈圆度和轮胎是否存在胶边的关键尺寸。通过将膨胀量值均匀分配于各花纹块之间的工艺,使电火花加工花筋连接无错台,花纹块加工质量好。     

双节距花纹块电火花加工分度表自动生成软件的研究

电火花加工子午线轮胎活络模具花纹块,需向机床输入工具电极加工位置的分度表数据.双节距花纹块需4种类型的工具电极,每种类型工具电极的分度表数据并不是连续的,实际生产时测量这些数据工作量大且易出错.针对这一现状,对双节距花纹块电火花加工分度表花纹节距排列规律进行了分析,并在此基础上建立了其数学模型,为后续分度表软件的实现奠定了基础.     

高速铣削与电火花加工在轮胎模具制造中的应用

针对子午线轮胎模具的花纹特点,分析了高速铣削和电火花加工工艺的特点及其在轮胎模具制造中的优势和局限性,指出了选择轮胎模具加工工艺的基本原则,并针对不同类型的轮胎模具给出了具体的加工工艺选择方案,可为轮胎模制造企业在制定轮胎模具加工工艺时提供参考。     

子午线轮胎活络模的花纹块模具设计与NC加工

介绍了子午线轮胎模具的生产流程。根据轮胎花纹的形状和花纹块的刚度，阐述了从轮胎图提取出花纹块模具轮廓的方法；按照工艺要求，研究了设计模具型腔并适当调整型腔形状的方法。阐述了花纹块模具NC加工时刀具选取、走刀路径规划、切削参数选择等技术，保证了在满足加工精度要求的情况下提高加工效率。     

电火花微精成形加工工艺的研究

介绍了航空发动机零件电火花微精成形加工工艺.阐述了电火花微精成形加工的实验过程和参数的选取方法,研究了电参数对零件加工精度和表面质量的影响,提出了合理选用电参数、设备和加工工艺的方法.最后详细介绍了两个典型航空零件的加工工艺方法.     

双节距花纹块电加工分度表生成软件的应用

为了解决依靠传统手工标注方式进行测量双节距花纹块电加工分度表效率低、容易出错的问题，开发出了双节距花纹块电加工分度表自动生成软件。用户只要将胎顶花纹的已知参数和设计参数输入该软件，便可自动获得电火花加工该双节距花纹块所需的分度表数据，大大提高了工作效率。     

基于正交试验的电火花加工工艺效果试验分析

通过正交试验分析,探讨了电火花成形加工中影响加工效果的主要因素,分别阐述了脉冲峰值电流、脉冲宽度及脉冲间隔等对加工速度、加工表面粗糙度及工具电极损耗的影响关系,对解决电火花加工实践中工艺参数优化问题具有一定的理论指导意义.     

外环块数控电火花加工工艺研究

航空发动机低压导向器中有一外环块组件,其形状复杂,加工精度要求高.针对外环块组件圆弧槽等型面电火花加工工艺进行了研究.通过大量的工艺试验,采用圆电极用圆弧插补加工和编制数控程序、优选工艺参数,加工出了符合图纸要求的零件.该工艺方法在生产应用中取得了良好的效果.     

电火花穿孔加工的工艺方法与工艺过程

利用电火花加工工艺 ,可以加工如下模具零件 :(1)冷冲模的凹模、凸凹模、卸料板、凸模固定板各种形孔进行穿孔加工。(2 )对塑料注射模、压塑模、合金压铸模及锻模进行型腔成形加工。此外 ,对冲模的凸模、凹模刃口表面进行强化处理 ,以提高模具的耐用度 ;对塑料模刻制文字、花纹及电火花攻制螺纹等 ,均可采用电火花进行加工。电火花加工机床的规格型号很多 ,其结构及工作原理可阅有关资料。这里 ,只介绍利用电火花加工机床对模具零件进行穿孔加工的工艺方法和工艺过程。1　电火花穿孔加工的工艺方法(1)直接加工法这种方法是将凸模直接作为电…     

电火花加工脉冲电源人机接口界面设计

利用 12 8× 2 4 0规格点阵式LCD模块设计了电火花加工脉冲电源人机接口界面 ,在汉字提示下能够完成加工尺寸、加工工艺参数设定、加工过程跟踪及设备状态监控等功能 ,使界面变得更为友好 ,大大地提高了脉冲电源的性能。     

Influences of pulsed power condition on the machining properties in micro EDM

Micro EDM is one of the most powerful technologies which are capable of fabricating micro-structure. However, there are many operating parameters that affect the micro EDM process. Since the EDM is basically a thermal process, the supplying electrical condition can be an important factor. The conditions generally consist of several parameters such as electrical current, voltage, pulse duration, spark gap, and others. Those are decisive in removal rate, wear rate, and machining accuracy, which are characteristics of EDM. In this study, the influences of EDM pulse condition on the micro EDM properties were investigated. Voltage, current, and on/off time of the pulse were selected as experimental parameters based on a simple equation for the material removal rate. The pulse condition is particularly focused on the pulse duration and the ratio of off-time to on-time, and the machining properties are reported on tool wear, material removal rate, and machining accuracy. The experimental results show that the voltage and current of the pulse exert strongly to the machining properties and the shorter EDM pulse is more efficient to make a precision part with a higher material removal rate.     

TC4电火花加工的工艺参数优化设计

对钛合金TC4进行电火花加工,运用正交试验的方法对数据进行处理,探究电火花加工的特性。重点分析了电参数中峰值电流、脉冲宽度和脉冲间隔及加工时间对电极损耗及加工速度的影响。寻找一组优化参数,研究结果对钛合金的电火花加工具有一定的参考意义。     

基于FPGA的电火花加工脉冲电源设计

为更好地满足电火花的加工要求,提出一种基于FPGA的电火花加工脉冲电源的实现。研究电火花加工脉冲电源的工作原理,脉冲电源的核心部件高频脉冲发生器采用IP软核实现,其输出信号的脉宽和脉间精细可调,能与上位机有效通信。该方法的有效性通过仿真和电路测试得到验证。     

超声电火花复合加工钛合金表面质量研究

采用电火花加工及超声电火花复合加工的方法对TC4钛合金进行了加工实验,分析了小电参数下两种加工方法中脉宽和峰值电流对表面粗糙度的影响,研究表明超声电火花复合加工可有效地降低零件表面粗糙度值.通过扫描电镜对零件表面形貌的分析和重熔层厚度的观测以及零件表面X射线衍射分析,表明采用超声电火花复合加工钛合金零件可获得较好的表面质量.     

谐振型电火花加工脉冲电源的研究

分析了限制电火花加工脉冲电源高频化的因素，利用并联谐振软开关技术和高速功率MOSFET器件，设计了一种新型电火花加工脉冲电源，对这种新型电源的工作原理进行了探讨与分析。     

Electrical discharge machining of Ti6Al4V with a bundled electrode

The aim of this study is to investigate an efficient Ti6Al4V electrical discharge machining (EDM) process with a bundled die-sinking electrode. The feasibility of machining Ti6Al4V with a bundled electrode was studied and its effect on EDM performance was compared experimentally using a solid die-sinking electrode. The simulation results explain the high performance of the EDM process with a bundled electrode by through the use of multi-hole inner flushing to efficiently remove molten material from the inter-electrode gap and through the improved ability to apply a higher peak current. A 3-factor, 3-level experimental design was used to study the relationships between 2 machining performance parameters (material removal rate: MRR, tool wear ratio: TWR) and 3 machining parameters (fluid flow rate, peak current and pulse duration). The main effects and influences of the 2-factor interactions of these parameters on the performances of the EDM process with the bundled electrode are discussed.     

PZT激励同步压缩放电通道微细电火花加工工艺参数对加工结果的影响

提出了压电陶瓷(piezoelectric ceramic transducer,PZT)激励同步压缩放电通道微细电火花加工,目的在于改善微细电火花加工的放电环境。介绍了PZT激励同步压缩放电通道微细电火花加工原理,研究了开路电压、脉冲宽度、脉冲频率和峰值电流对其电极损耗和材料去除率的影响,并与不采用压缩通道方法的微细电火花加工进行了对比。结果表明:同等条件下,采用PZT激励同步压缩放电通道技术,提高了加工过程的稳定性和材料去除率,降低了电极损耗率,有效改善了放电环境。     

Machining characteristics of magnetic force-assisted EDM

The gap conditions of electrical discharge machining (EDM) would significantly affect the stability of machining progress. Thus, the machining performance would be improved by expelling debris from the machining gap fast and easily. In this investigation, magnetic force was added to a conventional EDM machine to form a novel process of magnetic force-assisted EDM. The beneficial effects of this process were evaluated. The main machining parameters such as peak current and pulse duration were chosen to determine the effects on the machining characteristics in terms of material removal rate (MRR), electrode wear rate (EWR), and surface roughness. The surface integrity was also explored by a scanning electron microscope (SEM) to evaluate the effects of the magnetic force-assisted EDM. As the experimental results suggested that the magnetic force-assisted EDM facilitated the process stability. Moreover, a pertinent EDM process with high efficiency and high quality of machined surface could be accomplished to satisfy modern industrial applications.