本文選題：電解加工　切入點：振動　出處：《南京航空航天大學》2017年碩士論文　論文類型：學位論文

【摘要】：電解加工技術是航空發(fā)動機葉片、機匣等核心部件的關鍵制造技術,但隨著航空工業(yè)的發(fā)展,新型發(fā)動機零部件結構日趨復雜,精度要求日益提高,對現(xiàn)有的電解加工技術提出了越來越多的挑戰(zhàn)。本文以提升電解加工精度與加工整平能力為目標,開展脈沖振動相位耦合電解加工技術研究,分析了脈沖振動耦合電解加工的產(chǎn)物輸運情況和加工電流,掌握了脈沖振動相位耦合參數(shù)對加工精度與整平能力的影響,并采用脈沖振動相位耦合技術完成了典型航空發(fā)動機模鍛葉片加工試驗。本文的主要研究內(nèi)容如下:(1)搭建了脈沖振動相位耦合研究平臺。設計了工具陰極往復機械振動裝置與加工間隙可視化的工裝夾具,完善了基于IGBT的脈沖振動相位耦合控制系統(tǒng),采用高速攝像、電流傳感器、電渦流位移傳感器、示波器和記錄儀建立了脈沖振動相位耦合信號采集與檢測系統(tǒng),實現(xiàn)了加工電流波形、振動位移波形、間隙內(nèi)視頻圖像等信息實時采集與記錄。(2)提出了脈沖振動錯位前置耦合策略。在分析直流與工具振動耦合電解加工基礎上,發(fā)現(xiàn)了加工電流波形前置于工具陰極振動波形的現(xiàn)象,提出了以直流與工具振動耦合電解加工中電流波形的波峰為中心,對稱分布脈沖電流開通角的錯位前置耦合策略。通過傳統(tǒng)與錯位前置方法的對比試驗、不同開通角范圍的加工試驗,證明了脈沖振動錯位前置耦合策略的合理性。(3)開展了脈沖振動錯位前置耦合電解加工試驗研究。為了進一步比較傳統(tǒng)與錯位前置耦合方法的合理性,開展了傳統(tǒng)同相位耦合與錯位前置耦合的極限加工速度、最小穩(wěn)定加工間隙、加工整平能比對比試驗,試驗結果表明錯位前置耦合策略更具合理性。以典型航空發(fā)動機渦輪葉片為對象,針對葉片模鍛毛坯試件精度差,余量小等特點,采用錯位前置耦合電解加工工藝成功加工出葉片試件,試件具有較好的加工精度與表面質量。
[Abstract]:ECM technology is the key manufacturing technology of aero-engine blade, casing and other core components. However, with the development of aviation industry, the structure of new engine parts is becoming more and more complex, and the precision requirement is increasing day by day. More and more challenges have been put forward to the existing ECM technology. In order to improve the precision and leveling ability of ECM, the pulse vibration phase coupled ECM technology is studied in this paper. The product transport and machining current of pulse vibration coupled electrolytic machining are analyzed, and the influence of pulse vibration phase coupling parameters on machining accuracy and leveling ability is grasped. The pulse vibration phase coupling technique is used to complete the machining experiment of typical aero-engine die forging blade. The main research contents in this paper are as follows: 1) the research platform of pulse vibration phase coupling is built, and the tool cathode reciprocating machine is designed. Mechanical Vibration device and Machining clearance Visualization fixture, The pulse vibration phase coupling control system based on IGBT is perfected. The acquisition and detection system of pulse vibration phase coupling signal is established by using high speed camera, current sensor, eddy current displacement sensor, oscilloscope and recorder. The information of machining current waveform, vibration displacement waveform and video image in gap are collected and recorded in real time. The forward coupling strategy of pulse vibration dislocation is put forward. Based on the analysis of DC and tool vibration coupled electrolytic machining, The phenomenon that the machining current waveform is placed in front of the tool cathode vibration waveform is found, and the peak of the current waveform in the DC and tool vibration coupled electrolytic machining is proposed as the center. The misplacement precoupling strategy of symmetrical distributed pulse current opening angle. Through the contrast test between traditional and misplaced preposition method, the processing test of different opening angle range, It is proved that the precoupling strategy of pulse vibration misalignment is reasonable. (3) the experimental study of pulse vibration dislocation front coupling ECM is carried out. In order to further compare the rationality of traditional and misplaced front coupling methods, The limit machining speed, the minimum stable machining clearance and the machining leveling energy ratio of the traditional in-phase coupling and misalignment front coupling are carried out. The test results show that the misalignment leading coupling strategy is more reasonable. Taking typical aero-engine turbine blades as an example, the characteristics of low precision and small margin of blade die forging blank specimen are discussed. The blade specimen was successfully machined by staggered front coupled electrolytic machining (ECM) process. The specimen has good machining accuracy and surface quality.
【學位授予單位】：南京航空航天大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TG662

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