外文翻譯---電火花線切割工藝進(jìn)給率的控制(已修改)
2025-01-29 23:37 本頁面
【正文】 附 錄英文原文Feed rate control of the wireEDM processIntroductionThe CNC wireEDM machines first appears in the market in the 1970s，Although the wireEDM process has been playing an important role in the tooling and manufacturing industry，especially for the production of punches and dies，The metal removal process of wireEDM is very plex with stochastic and timevarying characteristics。 Moreover， many machining conditions such as workpiece properties(material，thickness)，machining settings(wire feed， table feed， flushing pressure，etc。)and power settings(pulse ontime，pulse interval，etc。)have an effect to the machining process。In order to improve the machining efficiency，stability and quality，many efforts have been made by the researchers and manufacturers to develop pulse discrimination and control system。Liao et al。developed a pulse discrimination system to study the characteristics of pulse trains in the wireEDM process。They also proposed an approximate method for estimating the variation of the average gap width。Wire breakage and unstable machining drastically reduce the machining efficiency and accuracy in wireEDM。Some adaptive control systems using the fuzzy control strategy employed the sensing parameters detected by the developed pulse discriminating and control system to monitor and control wire rupture suppression as well as maintain stable machining。Although these adaptive control systems can be applied to a wide rangeof machining conditions，they cannot respond to the gap conditions properly when there is an unexpected disturbance such as the condition of machining a stairshape workpiece。In order to carry out the processing of a workpiece with variable height，Rajurkar et al。 presented an adaptive control system to online optimize the sparking frequency by estimating the workpiece height with a multiinput model。 This paper presents a new puteraided pulse discriminating and control system for process motoring and control in wireEDM。By means of the pulse discriminating and control system，the relationships between machine settings and sensing parameters are analyzed quantitatively。According to the identified gap states，a control strategy is proposed by adjusting the feed rate in realtime to achieve stable machining。Feed rate control and the process parametersThe quality of feed rate control determines the stability of the gap width the machining process。 The following four process variables can be used for feed control：A、Gap voltage This process characteristic is average value of the gap volta
公司管理相關(guān)推薦
鄂ICP備17016276號(hào)-1