本文選題：數(shù)控銑削 + 穩(wěn)定性　； 參考：《寧夏大學(xué)》2017年碩士論文

【摘要】：銑削加工為多齒不連續(xù)切削,銑刀刀齒對(duì)工件往復(fù)性的沖擊不可避免地造成振動(dòng)。銑刀相對(duì)于被加工件的振動(dòng)使銑削表面產(chǎn)生振紋,降低被加工件的表面質(zhì)量,造成銑刀磨損甚至崩刃。銑削加工中出現(xiàn)的高頻率的振動(dòng)還會(huì)造成噪聲污染。工廠實(shí)際銑削加工生產(chǎn)中,經(jīng)過(guò)調(diào)節(jié)銑刀的剛度以及調(diào)節(jié)銑削用量削弱銑削振動(dòng)。上述方法需要中斷正在進(jìn)行的銑削加工,這樣就會(huì)降低工件加工效率,影響工廠生產(chǎn)效益。論文在以山東魯南機(jī)床有限公司生產(chǎn)的XK7132立式數(shù)控銑床為實(shí)驗(yàn)平臺(tái)的基礎(chǔ)之上,分析銑削加工過(guò)程的穩(wěn)定性,并研發(fā)以磁流變液為基礎(chǔ)的銑削顫振控制方法。首先,通過(guò)對(duì)經(jīng)過(guò)升級(jí)改造后的銑床進(jìn)行錘擊實(shí)驗(yàn),獲得刀尖處模態(tài)參數(shù);進(jìn)而經(jīng)過(guò)數(shù)值擬合得到銑削力系數(shù);在上述模態(tài)參數(shù)和銑削力系數(shù)的條件下,運(yùn)用經(jīng)典“零階頻域法”分析銑削加工的穩(wěn)定性,并討論不同銑削用量、銑刀形狀尺寸對(duì)銑削穩(wěn)定性的作用:然后,研究磁流變技術(shù)及磁流變減振器在切削顫振抑制中的作用;最后,設(shè)計(jì)基于磁流變液的立式銑床減振工作臺(tái),通過(guò)調(diào)節(jié)電流改變裝置庫(kù)侖力,達(dá)到減振效果。基于磁流變液的立式銑床減振工作臺(tái)減振控制作用最終通過(guò)銑削切削實(shí)驗(yàn)得以驗(yàn)證。論文研究工作的穩(wěn)定性分析部分,對(duì)工廠實(shí)際銑削加工中工件表面振動(dòng)控制會(huì)有重要的指導(dǎo)意義;基于磁流變液的銑削顫振控制技術(shù)在同類立式數(shù)控銑床上具有重要的參考價(jià)值。
[Abstract]:The milling process is multi-tooth discontinuous cutting, and the impact of milling cutter teeth on the reciprocating property of the workpiece inevitably causes vibration. The vibration of milling cutter relative to the added workpiece makes the milling surface vibrate, reduces the surface quality of the added workpiece, and causes the milling cutter to wear and even break the edge. The high frequency vibration in milling also causes noise pollution. In actual milling production, milling vibration is weakened by adjusting the stiffness of milling cutter and adjusting milling amount. The above method needs to interrupt the milling process, which will reduce the processing efficiency of the workpiece and affect the production efficiency of the factory. Based on the experimental platform of XK7132 vertical NC milling machine produced by Shandong Lunan Machine tool Co., Ltd., the stability of milling process is analyzed, and the milling chatter control method based on magneto-rheological fluid is developed. Firstly, the modal parameters at the tip of the cutter are obtained by hammering the milling machine after upgrading, and then the milling force coefficient is obtained by numerical fitting. Under the condition of the above modal parameters and the milling force coefficient, The stability of milling process is analyzed by using the classical "zero-order frequency domain method", and the effects of different milling dosage and milling cutter shape on milling stability are discussed: secondly, the effect of magneto-rheological technology and magneto-rheological shock absorber in cutting flutter suppression is studied. Finally, the damping table of vertical milling machine based on magnetorheological fluid is designed. The vibration control effect of vertical milling machine damping table based on magnetorheological fluid is finally verified by milling experiments. The stability analysis of the research work in this paper will be of great significance to the vibration control of the workpiece surface in the actual milling process of the factory. The flutter control technology based on magnetorheological fluid has important reference value in the similar vertical NC milling machine.
【學(xué)位授予單位】：寧夏大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TG547

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本文編號(hào)：2102362