共查询到20条相似文献,搜索用时 78 毫秒
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混粉电火花加工工艺初探 总被引:4,自引:0,他引:4
介绍了混粉电火花加工工艺的发展概况,解释了混粉电火花加工中出现的一些现象。文章认为,在一定加工时间的保证下,选择合理的加工规准,能够用混粉电火花加工机床加工面积100cm^2,表面粗工Ra为1.83μm的镜面。 相似文献
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针对模具型腔的混粉电火花加工应用技术进行了探讨,对模具制造企业吸收与消化当前先进的电火花加工工艺具有实际的应用价值。 相似文献
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混粉电火花加工是一种改善电火花加工表面粗糙度与加工效率的先进工艺方法,近几年在像手机外壳模具、遥控器外壳模具等型腔模的电火花精加工中发挥着越来越重要的作用.通过对型腔模混粉电火花加工应用技术的探讨,对模具制造企业吸收与消化当前先进的电火花加工工艺具有实际的应用价值. 相似文献
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A Study on Process Parameters of Ultrasonic Assisted Micro EDM Based on Taguchi Method 总被引:2,自引:0,他引:2
Murali M. Sundaram Ganesh B. Pavalarajan Kamlakar P. Rajurkar 《Journal of Materials Engineering and Performance》2008,17(2):210-215
Experimental investigation of ultrasonic assisted micro electro discharge machining was performed by introducing ultrasonic
vibration to workpiece. The Taguchi experimental design has been applied to investigate the optimal combinations of process
parameters to maximize the material removal rate and minimize the tool wear. Analysis of variance (ANOVA) was performed and
signal-to-noise (S/N) ratio was determined to know the level of importance of the machining parameters. Based on ANOVA, ultrasonic
vibration at 60% of the peak power with capacitance of 3300 PF was found to be significant for best MRR. The machining time
plays a significant role in the tool wear. The results were confirmed experimentally at 95% confidence interval. 相似文献
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Sequential Laser and EDM Micro-drilling for Next Generation Fuel Injection Nozzle Manufacture 总被引:1,自引:0,他引:1
High quality holes of diameters less than 145 μm are required for the manufacture of next generation diesel fuel injection nozzles for improved combustion efficiency and reduction of emission to the environment. The current practice of using electro-discharge machining (EDM) drilling of fuel injection nozzles is limited in terms of the hole size it can produce effectively and the length of time needed to drill. In addition, the tooling cost is high. This paper reports on an investigation into a sequential laser and EDM micro-drilling technique for the manufacture of next generation fuel injection nozzles. A laser-drilled pilot hole is rimmed out by EDM drilling. It was found that this hybrid process has eliminated the problems of recast and heat affected zones typically associated with the laser drilling process. The new process has enabled a 70% reduction in total drilling time compared to standard EDM drilling as less material is removed by the EDM. The quality of the holes is as good as direct EDM drilling, thus eliminating the need for re-certification of the drilling process. Various combinations of laser/EDM drilling conditions have been examined. Optimum diameters for the pilot hole and the EDM electrode have been identified for a particular diameter of fuel injection nozzle, giving the minimum total drilling time and the best quality holes. A special system was designed to enable the alignment of nozzles to be controlled to within ± 20 μm. The technique has enabled valuable cost savings and increase in production capacity for next generation fuel injection nozzle manufacture. 相似文献