本文選題：葉輪 + 五軸聯(lián)動加工��； 參考：《遼寧科技大學(xué)》2016年碩士論文

【摘要】：在機(jī)械裝配業(yè)中,葉輪零件是一具有代表性的重要零件,其結(jié)構(gòu)造型比較復(fù)雜,具有明顯的形狀特征。葉輪的造型過程往往涉及流體力學(xué),空氣動力學(xué)等多門學(xué)科,葉輪在加工時采用的加工方法、工藝規(guī)劃、加工精度和加工質(zhì)量對葉輪最終的性能會有很大程度的影響。葉輪在工業(yè)上的應(yīng)用十分廣泛,例如能源動力、航空航天、船舶、冶金等。隨著葉輪加工技術(shù)的不斷發(fā)展,利用五軸聯(lián)動數(shù)控技術(shù)加工葉輪得到越來越多的應(yīng)用,并日漸走向成熟。本文主要研究的是提高葉輪加工的效率和質(zhì)量,結(jié)合實際生產(chǎn)條件和企業(yè)要求,對葉輪的五軸聯(lián)動數(shù)控加工技術(shù)進(jìn)行研究。本文首先研究NURBS原理并對葉輪結(jié)構(gòu)進(jìn)行分析,然后將已處理分片截取的點云導(dǎo)入UG/CAM軟件中利用逆向工程技術(shù)對葉片模型重構(gòu)進(jìn)而建立整體葉輪模型。其次在高速銑削技術(shù)和五軸聯(lián)動數(shù)控技術(shù)的基礎(chǔ)上制定合理的加工工藝,并且分析在葉輪加工中出現(xiàn)的難點和技術(shù)要求,制定合理的工藝階段的規(guī)劃,例如毛坯、刀具和夾具的選擇,刀軸的控制,切削余量的設(shè)定等,然后在保證最短加工時間和質(zhì)量的目標(biāo)下,利用數(shù)學(xué)優(yōu)化法建立數(shù)學(xué)模型,并在MATLAB中進(jìn)行編程計算得到最優(yōu)參數(shù),達(dá)到對切削參數(shù)優(yōu)化的目的。根據(jù)所得優(yōu)化參數(shù)在UG/CAM中進(jìn)行葉輪加工編程得到刀軌文件。針對使用的DMU80 mono BLOCK五軸聯(lián)動機(jī)床,分析機(jī)床結(jié)構(gòu),基于UG/Post構(gòu)造該機(jī)床專用的后處理器,然后將所得的刀軌文件通過該后置處理轉(zhuǎn)化為所需要的NC代碼。最后基于VERICUT仿真平臺,構(gòu)建DMU80 monoBLOCK五軸聯(lián)動機(jī)床模型,在VERICUT中進(jìn)行仿真模擬,來檢驗刀具軌跡的正確性和加工的經(jīng)濟(jì)性。
[Abstract]:In the mechanical assembly industry, impeller part is a representative important part, its structure shape is quite complex, has the obvious shape characteristic. The modeling process of impeller often involves many subjects such as hydrodynamics, aerodynamics and so on. The processing methods, process planning, machining precision and machining quality of impeller will have a great influence on the final performance of impeller. Impellers are widely used in industry, such as energy power, aerospace, shipping, metallurgy and so on. With the development of impeller machining technology, five-axis NC machining technology has been applied more and more, and gradually becoming mature. In this paper, the main research is to improve the efficiency and quality of impeller machining, combined with the actual production conditions and enterprise requirements, the five-axis NC machining technology of impeller is studied. In this paper, the Nurbs principle is first studied and the impeller structure is analyzed, then the point cloud which has been processed and cut off is imported into the UG / CAM software and the blade model is reconstructed by reverse engineering technology and the integral impeller model is established. Secondly, on the basis of high-speed milling technology and five-axis linkage NC technology, the reasonable processing technology is established, and the difficulties and technical requirements in the processing of impeller are analyzed, and the reasonable process planning, such as blank, is worked out. The selection of cutting tool and fixture, the control of cutter axis, the setting of cutting margin, etc. Then, under the goal of ensuring the shortest processing time and quality, the mathematical model is established by using mathematical optimization method, and the optimal parameters are obtained by programming in MATLAB. The aim of optimizing cutting parameters is achieved. According to the optimized parameters, the cutter track file is obtained by programming the impeller in UG / CAM. Aiming at the DMU80 mono block five-axis linkage machine tool, the structure of the machine tool is analyzed, and the special post processor is constructed based on UG / Post. Then the tool track file is transformed into the needed NC code through the post processing. Finally, a DMU80 monoBLOCK five-axis machine tool model is constructed based on VerICUT simulation platform, and simulated in Vericut to verify the correctness of tool path and the economy of machining.
【學(xué)位授予單位】：遼寧科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：U464.135

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