共查询到19条相似文献,搜索用时 125 毫秒
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微细电火花加工实验及工艺规律研究 总被引:1,自引:0,他引:1
微细电火花加工在当前微细加工中显示出巨大的发展潜力。通过用自行研制的微细电火花加工系统进行的一系列微细电欠花加工实验,对影响微细电火花加工加工效率和加工精度的各种因素(如充放电电容、开路电压和工作介质等)进行了研究, 相似文献
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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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介绍了“一次过加工”技术的概念,分析了超高速切削、磨削,电解、电火花、精锻、精铸的“一次过加工”技术特点,对其适用场合、相互关系和应用前景做了较为详细的阐述。 相似文献
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Analytical model to determine the critical feed per edge for ductile-brittle transition in milling process of brittle materials 总被引:2,自引:0,他引:2
Muhammad Arif 《International Journal of Machine Tools and Manufacture》2011,51(3):170-181
Brittle materials like glass are considered difficult-to-machine because of their high tendency towards brittle fracture during machining. The technological challenge in machining such brittle materials is to achieve material removal by plastic deformation rather than characteristic brittle fracture. In ductile mode machining, the material is removed predominantly by plastic deformation and any cracks produced due to possible fracture in the cutting zone are prevented from extending into the machined surface. This is achieved by selecting an appropriate cutting tool and suitable machining parameters. In ductile machining by milling process, fracture induced cracks are diverted away from final machined surface by selecting a suitable feed per edge less than a critical threshold value. Hence determination of critical feed per edge is of paramount importance to achieve ductile mode machining by milling process. This paper presents an analytical model based on fracture mechanics principles to predict the critical feed per edge in milling process of glass. The size and orientation of cracks originating from brittle fracture during machining have been quantified by using indentation test results and the critical value of feed per edge has been determined analytically as a function of intrinsic materials properties governing brittle fracture and plastic deformation. Furthermore, an equivalent tool included angle has been suggested for machining operation as against the indenter included angle to correlate the indentation and machining test results with improved degree of accuracy. Experimental results validated the proposed model fairly accurately. It has been established that if the longest cracks oriented in radial direction to the cutting edge trajectory are prevented from reaching the final machined surface by selecting a feed per edge less than or equal to a critical value, a crack-free machined surface can be achieved. 相似文献
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在分析了型腔模数控加工工艺及特点后 ,介绍了用Cimatronit软件对型腔模数控加工的常用加工工艺。通过实际的应用案例 ,介绍了典型零件的加工工序及关键加工参数的设置。 相似文献
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在分析了型腔模数控加工工艺及特点后, 介绍了用Cimatron^it软件对型腔模数控加工的常用加工工艺。通过实际的应用案例,介绍了典型零件的加工工序及关键加工参数的设置。 相似文献