共查询到19条相似文献,搜索用时 404 毫秒
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对线切割加工中造成断丝的原因进行了分析,从钼丝本身质量、装丝的松紧程度及丝筒转速、丝筒换向频率、加工电参数选择、加工工件材料性能、乳化液质量与运丝系统的稳定性等方面找出预防断丝的措施,可为从事线切割加工的人员提供参考。 相似文献
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研究了实施多次切割工艺时钼丝运行状态及影响其运行的因素,并用试验验证,通过安装钼丝张紧装置、减少钼丝运行抖动并合理选择电加工参数,在快走丝线切割机上不仅能实施多次切割工艺,并能改善线切割零件质量,满足线切割加工质量要求。 相似文献
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表面微织构加工是一个相当复杂的过程,涉及微织构的尺寸、质量及形貌等问题。为解决制备微织构存在的问题,利用数控电火花线切割加工技术,在45钢表面加工微槽织构,研究线切割制备微织构的尺寸、形貌。试验分别采用钼丝、铜丝作为电极丝,设计脉宽、脉停、电流等线切割正交试验,切割宽度小于400μm的微槽织构,分析不同线切割参数、电极丝材料对微槽尺寸精度和微槽切口处光整度的影响。通过采集、测量试验所得工件表面微槽织构,发现线切割参数对微槽尺寸精度和切口处光整度有较大的影响;在较小线切割参数下,钼丝切割的微槽尺寸大于铜丝,在较大的线切割参数下,铜丝切割的微槽尺寸大于钼丝;对比微槽切口处光整度,发现钼丝切割的微槽整体质量优于铜丝。试验列出不同线切割参数切割的微槽尺寸,为电火花线切割加工微织构提供了试验数据。 相似文献
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四、断钼丝 1.切割碳钢材料容易断丝过去一般模具的凹、凸模材料都采用T8A或T10A。此种材料因淬火渗透性能差,线切割加工时变形量大且切割表面可有开裂现象。材料的开裂、变形会突然夹牢钼丝,造成断 相似文献
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线切割加工中断丝产生的原因及排除方法 总被引:1,自引:0,他引:1
在目前的模具加工中,由于电火花线切割机在加工时不产生大的切削力,异形件便于加工,且加工效率较高,故应用比较广泛。在电火花线切割加工过程中,钼丝是在循环运动的,钼丝绕在贮丝筒上,再通过上、下线臂上的导向轮和导丝轮,循环一周再回到贮丝筒上。导向轮和导丝轮两端是轴承结构,使用时间长了或精度发生了变化自然引起导轮的跳动,会引起加工中的断丝现象。断丝产生的原因比较复杂,但断丝又是线切割操作工最担心的事,轻则增加工作量,重则造成模具的报废。笔者对电火花线切割机在工作中断丝的原因和排除方法作以下归纳,仅供同行… 相似文献
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随着数控线切割机床的广泛应用,对数控线切割机床加工范围,加工精度,光洁度及加工效率的要求也相应提高了。为适应形势的需要,提高精度、光洁度和生产率,钼丝切割中保持平稳地运行状态起着重要的作用。钼丝运行中的平稳又取决于支承座的结构合理性。目前,导轮支承座均采用滚动轴承。钼丝运行中,滚动轴承处于高速运转状态。因 相似文献
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线切割加工模具的工艺要点分析 总被引:1,自引:0,他引:1
针对电火花线切割的工艺特征,分析加工过程中电极丝偏移量产生的原因。介绍了线切割数控编程中电极丝中心线实际走丝轨迹的计算原则和方法,提出穿丝孔的确定与切割路线的优化方面的工艺优点。并就线切割加工中模具零件的特殊工艺情况,提出相应的工艺措施,以改善模具的加工精度和制造质量,及提高生产效率。 相似文献
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通过对数控电火花线切割加工中的电极丝直径大小的分析,探讨了电极丝直径大小对线切割加工的工艺影响,以及更换电极丝大小的方法. 相似文献
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Fuzhu Han Gang Cheng Zhijing Feng Soichiro Isago 《International Journal of Machine Tools and Manufacture》2008,48(7-8):922-931
The tension control of the micro wire electrode is a key technology for the micro wire electro-discharge machining (WEDM). Based on the coupled thermo-mechanical analysis, both the three-dimensional temperature and the stress distribution in the micro wire are determined. As a result, the tension of the micro wire electrode during the WEDM process can be optimized in accordance with the discharge energy, which is sampled and fed back to the tension control system in real time. Then the development of an optimal tension control system characterized by the form of master–slaver structure makes it possible to keep the wire tension optimal in the process of WEDM. The results of the machining experiments show that the optimal wire tension control is effective on the improvement of the machining accuracy with the prevention of wire breakage for the micro WEDM. 相似文献
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State of the art in wire electrical discharge machining (WEDM) 总被引:9,自引:1,他引:9
K. H. Ho S. T. Newman S. Rahimifard R. D. Allen 《International Journal of Machine Tools and Manufacture》2004,44(12-13):1247-1259
Wire electrical discharge machining (WEDM) is a specialised thermal machining process capable of accurately machining parts with varying hardness or complex shapes, which have sharp edges that are very difficult to be machined by the main stream machining processes. This practical technology of the WEDM process is based on the conventional EDM sparking phenomenon utilising the widely accepted non-contact technique of material removal. Since the introduction of the process, WEDM has evolved from a simple means of making tools and dies to the best alternative of producing micro-scale parts with the highest degree of dimensional accuracy and surface finish quality.Over the years, the WEDM process has remained as a competitive and economical machining option fulfilling the demanding machining requirements imposed by the short product development cycles and the growing cost pressures. However, the risk of wire breakage and bending has undermined the full potential of the process drastically reducing the efficiency and accuracy of the WEDM operation. A significant amount of research has explored the different methodologies of achieving the ultimate WEDM goals of optimising the numerous process parameters analytically with the total elimination of the wire breakages thereby also improving the overall machining reliability.This paper reviews the vast array of research work carried out from the spin-off from the EDM process to the development of the WEDM. It reports on the WEDM research involving the optimisation of the process parameters surveying the influence of the various factors affecting the machining performance and productivity. The paper also highlights the adaptive monitoring and control of the process investigating the feasibility of the different control strategies of obtaining the optimal machining conditions. A wide range of WEDM industrial applications are reported together with the development of the hybrid machining processes. The final part of the paper discusses these developments and outlines the possible trends for future WEDM research. 相似文献