共查询到19条相似文献,搜索用时 93 毫秒
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通过对电极的优化设计制造、工件定位的精度保证、工件的定位加工3个方面提高电火花加工的精度。详细讨论了如何降低和消除电极加工精度误差、电火花加工机的几何精度误差、工件电极的校正精度误差、定位精度误差等对电火花加工精度的影响,从而提高电火花加工精度。 相似文献
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<正> 我国模具电火花加工技术的发展可分三个阶段1 50年代到60年代中期为第一阶段 50年代,我国开始研究应用电火花加工技术,先应用电火花镀覆冲模刃口及其他工具,提高了模具使用寿命,同时用电火花穿孔、制模、切断、磨削和修理等。并于1954年研制了喷油嘴小孔加工的电火花机床。 相似文献
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混粉电火花镜面加工表面性能研究 总被引:3,自引:0,他引:3
利用自行研制的混粉电火花镜面加工装置,以淬火状态的8407模具钢为例,对多种添加粉末下的混粉电火花镜面加工表面性能进行了研究。研究结果表明,混粉电火花镜面加工不但能够显著降低加工表面粗糙度值,而且能够提高加工表面的耐磨性、耐蚀性和表层显微硬度。 相似文献
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针对放电诱导烧蚀加工在高效加工的同时易在工件表面产生巨大烧蚀坑的问题,提出了电火花诱导烧蚀磨削修整复合加工方法。对钛合金TC4进行了电火花加工、烧蚀加工、诱导烧蚀磨削修整复合加工的对比实验,研究机械磨削作用对烧蚀性能的影响。在钛合金烧蚀加工实验过程中,用复合机械磨头进行修整能显著提高加工效率,达到1107 mm3/min,是同等条件下电火花加工的6.77倍、烧蚀加工的1.27倍。由于存在机械磨削修整作用,可在线去除烧蚀产物,露出基体材料,工件表面粗糙度优于烧蚀加工,甚至优于同等电参数下的电火花加工,达到了在获得高效加工的同时提升表面质量的目的。 相似文献
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根据模具企业多年的电火花加工实践经验,就提高电火花加工效率进行了综合探讨.具体从加工工艺、机床调整、操作要点3个方面作了充分阐述,对提高电火花加工质量具有积极的指导作用. 相似文献
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A simple approach for robust design of high-speed electrical-discharge machining technology 总被引:2,自引:0,他引:2
Yih-fong Tzeng Fu-chen Chen 《International Journal of Machine Tools and Manufacture》2003,43(3):217-227
The paper presents a simple approach for optimizing high-speed electrical-discharge machining (EDM). The approach begins with designing the ideal function of an EDM system coupled with Taguchi methods for process optimization. It has been proposed that the ideal function has a linear relationship between the input signal (intended dimension) and the output response (product dimension). This model seeks to develop a robust machining process enabling high precision and accuracy of machining a product.In this study, a two-step optimization strategy has been applied. The first step is to reduce the functional variability of the EDM system to enhance process robustness. The second step is to increase the machining accuracy by adjusting the slope of the best-fit line between the input signals and the output responses. Experimental results have shown that the use of the proposed model is simple, effective, and efficient in the development of robust and high-quality EDM machining processes. 相似文献
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Machining performance on hybrid process of abrasive jet machining and electrical discharge machining
To develop a hybrid process of abrasive jet machining (AJM) and electrical discharge machining (EDM),the effects of the hybrid process parameters on machining performance were comprehensively investigated to confirm the benefits of this hybrid process.The appropriate abrasives delivered by high speed gas media were incorporated with an EDM in gas system to construct the hybrid process of AJM and EDM,and then the high speed abrasives could impinge on the machined surface to remove the recast layer caused by EDM process to increase the efficiency of material removal and reduce the surface roughness.In this study,the benefits of the hybrid process were determined as the machining performance of hybrid process was compared with that of the EDM in gas system.The main process parameters were varied to explore their effects on material removal rate,surface roughness and surface integrities.The experimental results show that the hybrid process of AJM and EDM can enhance the machining efficiency and improve the surface quality.Consequently,the developed hybrid process can fit the requirements of modern manufacturing applications. 相似文献
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将先进的电力电子器件应用于电火花加工脉冲电源,改变了传统电火花加工脉冲电源参数选择的理念,提出了从根本上改变电源结构的一种新思路.此电源适用于加工不同的材料,可提高脉冲电源的能量利用率和加工效率,降低能耗. 相似文献
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精密模具的大面积镜面加工技术 总被引:1,自引:1,他引:0
介绍了精密模具电火花镜面加工的意义及国内外电火花镜面加工的研究概况。在讨论电火花镜面加工机理的基础上 ,对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 ,并对精密模具电火花镜面加工的主要关键技术进行了讨论 ,包括镜面加工脉冲电源的设计、镜面加工电火花控制系统、电极和工件材料的影响因素、混粉工作液加工工艺等 相似文献
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针对SiCp/Al的加工,提出一种超声振动磨削放电复合加工的方法.从加工效率、加工稳定性及表面质量等方面与电火花加工进行了对比试验研究。分析了两种加工方法的脉冲宽度和峰值电流对加工速度和表面粗糙度的影响,结果表明:电火花加工的表面粗糙度平均值为尺04.5μm,超声振动磨削放电复合加工的表面粗糙度平均值为Ra2μm:超声振动磨削放电复合加工的稳定性比电火花加工好,但加工速度较低。通过扫描电镜对两种加工方法下零件表面形貌和重熔层进行了观测,对试件表面进行了X射线衍射分析,表明采用超声振动磨削放电复合加工SiCp/Al复合材料可获得较好的表面质量。 相似文献
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Yan-Cherng Lin Ho-Shiun Lee 《International Journal of Machine Tools and Manufacture》2008,48(11):1179-1186
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. 相似文献