共查询到19条相似文献,搜索用时 203 毫秒
1.
2.
3.
4.
5.
6.
7.
8.
根据锥形水射流钻头螺旋曲面叶轮的几何展成原理,研究了用数控电火花成形机对其展成加工一次成形的方法,讨论了展成加工中存在的电极干涉而导致的过切现象以及成形电极的修正设计方法。 相似文献
9.
针对电火花线切割工艺特征,分析了线切割加工中电极丝偏移量产生的原因,提出数控编程中电极丝中心线实际加工轨迹的计算方法及工件线切割加工的工艺性分析与特殊工艺的处理方法,以提高线切割加工件的加工精度和制造质量。 相似文献
10.
传统机械铣削和电火花成形方法加工深窄槽,效率低、精度差,因此提出利用主轴高速旋转圆盘电极加工深窄槽的电火花加工方法。对不同主轴转速下的加工速度、电极损耗及表面粗糙度进行了实验研究,结果表明:提高主轴转速,有利于提高深窄槽的加工速度,并能降低电极损耗,改善加工表面质量。 相似文献
11.
对手机壳塑料模具紫铜电极的结构和功能进行了研究,分析了电极高速加工的工作过程、工艺路线、装夹方式、刀具选用和切削用量,介绍了紫铜电极高速加工编程的具体步骤,重点阐述了如何选取高速加工工艺参数。实践结果表明,整个加工过程清晰、刀具和切削参数选用合理。 相似文献
12.
移动热源作用下电火花线切割加工电极丝三维温度场模拟 总被引:2,自引:0,他引:2
往复走丝和“中走丝”电火花线切割机床是中国独创的电加工设备,在模具制造等行业发挥着重要作用.由于其电极丝是重复使用的,因此电极丝损耗是普遍存在的问题.在电极丝与工件之间相对运动的情况下,建立了移动热源条件下的电极丝传热模型,通过有限元分析对单脉冲放电条件下电极丝表面温度场进行了三维仿真,发现当走丝速度增加时电极丝熔融区... 相似文献
13.
14.
15.
16.
Micro rotational parts are used in several industrial sectors. Well-known applications are micro shafts of gears, ejector
pins in forming tools, pin electrodes for micro electrical discharge drilling or micro stamping dies. Depending on the geometrical
complexity of micro rotational parts different process variants of micro electrical discharge machining characterized by a
rotating work piece can be used: wire electrical discharge grinding (WEDG) with fine wire electrodes, electrical discharge
turning (EDT) with micro structured tool electrode, cylindrical electrical discharge grinding (CEDG) with micro profiled disk
electrode. Characteristic to these process variants is the superimposed relative motion between the rotating electrodes and
the feed. This relative motion can be varied in a wide circumferential velocity range to improve the material removal process.
The paper gives an overview of kinematic and technological restrictions and requirements of the WEDG process influencing the
process behavior with respect to the technological requirements of micromachining. 相似文献
17.
应用田口-灰关联法对Inconel 718微放电铣削多重质量特性如电极消耗率、材料去除率和扩口量进行最佳化,分析放电电流、脉冲时间、休止时间和极间间隙对加工Inconel 718之电极消耗率、材料去除率和扩口量的影响。实验结果表明,以最佳微放电铣削参数进行加工,其电极消耗率由5.6×10-9mm3/min降低到5.2×10-9mm3/min,材料去除率由0.47×10-8mm3/min增加到1.68×10-8mm3/min,扩口量由1.27μm降低到1.19μm。研究结果显示,应用田口-灰关联法,可以改善微放电铣削多重质量特性。 相似文献
18.
19.
Y.H. Liu R.J. Ji X.P. Li L.L. Yu H.F. Zhang Q.Y. Li 《International Journal of Machine Tools and Manufacture》2008,48(9):1030-1035
Wire electric discharge machining (WEDM) and electrical discharge machining (EDM) promise to be effective and economical techniques for the production of tools and parts from conducting ceramic blanks. However, the manufacturing of insulating ceramic blanks with these processes is a long and costly process. This paper presents a new process of machining insulating ceramics using electrical discharge (ED) milling. ED milling uses a thin copper sheet fed to the tool electrode along the surface of the workpiece as the assisting electrode and uses a water-based emulsion as the machining fluid. This process is able to effectively machine a large surface area on insulating ceramics. Machining fluid is a primary factor that affects the material removal rate and surface quality of the ED milling. The effects of emulsion concentration, NaNO3 concentration, polyvinyl alcohol concentration and flow velocity of the machining fluid on the process performance have been investigated. 相似文献