共查询到19条相似文献,搜索用时 171 毫秒
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精密型腔类模具的大面积镜面加工方法 总被引:2,自引:0,他引:2
介绍了两种精密型腔类模具的镜面加工方法,对混粉电火花镜面加工方法和高速切削加工方法进行了分析对比。对电火花镜面加工的工艺参数、加工设备、影响因素等问题进行了分析,并对精密模具型腔电火花镜面加工的关键技术进行了讨论。论述了高速切削加工技术的意义及其在模具制造中的应用前景。 相似文献
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混粉电火花镜面加工技术及应用 总被引:2,自引:0,他引:2
利用自行研制的混粉电火花镜面加工装置,对混粉电火花镜面加工影响因素,加工表面性能等进行了深入研究,找出了粉末特性,工件材料,粉末浓度及放电参数等对混粉电火花镜面加工的影响规律,给出了合理的混粉电火花镜面加工工艺条件,以文中确定的加工工艺条件对铸造和压铸模具进行混粉电火花镜面加工,结果表明,该技术能提高模具制造质量,降低工人劳动强度,缩短模具制造周期。 相似文献
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在研究分析电火花成型铣削的工艺方法,工艺特点及适用范围基础上,提出将其与混粉工艺相结合,应用于模具成型零件的制造,可提高加工效率,获得镜面效果的高精度型腔,使电火花加工成为模具型腔的最终精加工. 相似文献
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利用快速成型技术和复合陶瓷型壳技术制备叶轮发泡模具电火花加工电极的精密铸造型壳,实现了电极的快速精密铸造。实践表明,使用该工艺铸造的电极具有尺寸精度高、表面光洁度好的特点,可满足模具电火花加工的使用要求。 相似文献
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M.P. Jahan M. Rahman Y.S. Wong 《International Journal of Machine Tools and Manufacture》2011,51(12):837-858
The capability of machining intricate features with high dimensional accuracy in hard and difficult-to-cut material has made electrodischarge machining (EDM) process as an inevitable and one of the most popular non-conventional machining processes. In recent years, both EDM and micro-EDM processes are being used extensively in the field of mould making, production of dies, cavities and complex 3D structures using difficult-to-cut tungsten carbide and its composites. The objective of this paper is to provide a state of the art in the field of EDM and micro-EDM of tungsten carbide and its composites. The review begins with a brief introduction on the EDM and micro-EDM processes. The research and developments in electrodischarge machining of tungsten carbide are grouped broadly into conventional EDM of tungsten carbide, micro-EDM of tungsten carbide and current research trends in EDM and micro-EDM of tungsten carbide. The problems and challenges in the area of conventional and micro-EDM of tungsten carbide and the importance of compound and hybrid machining processes are discussed. A summary of the future research directions based on the review is presented at the final section. 相似文献
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全面分析了模具自由曲面的数控加工过程,介绍了影响曲面精度、表面质量的相关因素。提高模具曲面加工质量、精度需要多种因素的良好配合。 相似文献
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A study of EDM and ECM/ECM-lapping complex machining technology 总被引:1,自引:0,他引:1
Tsuneo Kurita Mitsuro Hattori 《International Journal of Machine Tools and Manufacture》2006,46(14):1804-1810
EDM (electrodischarge machining) and ECM (electrochemical machining)/ECM-lapping complex machining is investigated in this paper. First, EDM shaping and ECM finishing technology are investigated. These processes are carried out in sequence on the same machine tool with the same electrode (copper) and the same machining liquid (water). Two types of EDM and ECM complex machining are investigated. One is with a formed electrode, and the other is with simple-shape electrode scanning. The complex machining with electrode scanning is applied to produce small and various-shaped components without making a formed electrode. The EDM surface of 1 μm Ra is improved to 0.2 μm Ra by applying ECM. Second, in order to get a smoother surface, a new EDM and ECM-lapping complex machining technology is developed. The surface roughness of a machined hole is improved to 0.07 μm Ra by applying 2 min of ECM lapping. The surface finishing of a hole shape is demonstrated with the complex machining technology. 相似文献
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从材料的残余应力、加工工艺、机床自身因素入手,分析了快走丝线切割在模具型腔和型芯的加工过程中影响加工精度和表面质量的主要因素,提出了提高线切割加工精度和表面质量的改进措施,在实际加工过程中效果显著. 相似文献
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工程陶瓷材料硬脆、导电率低,难以获得高效精密的电加工效果.本文针对工程陶瓷电火花加工特点,在分析国内外工程陶瓷电火花加工技术的基础上,提出了基于遗传算法的工程陶瓷电火花加工方法.该方法结合遗传算法、神经网络及模糊控制理论构造了多环式自适应控制系统,在线对加工过程进行断丝预防、加工工艺自适应和加工参数自适应监测与控制,从而为难加工材料实现高效精密的电火花加工提供理论与技术指导. 相似文献