數(shù)控機(jī)床畢業(yè)論文外文翻譯-其他專業(yè)(編輯修改稿)
2025-02-24 12:04 本頁(yè)面
【文章內(nèi)容簡(jiǎn)介】 ng center developed in 20212021 at universidad de los andes was studied, and based on the results obtained, a new prototype was proposed. the motivation behind the design and construction of this machine tool was to achieve higher precision in the machining process pared with conventional turning produced in macro machine tools. a machine, with spindle rotation speed up to 300 000 rpm was achieved, the cutting tool moves in two axes through step motors connected to worm gear reductions, thus resolution of 1μm is achieved. the interpolator was programmed based on dda integration. the machine was set under a stereoscope to visualize the machining operations with zoom up to 30x. micromachining was reached adopting nc control and it was possible to characterize microturned cortical bone samples. 本文對(duì)數(shù)控車床的微觀概念的發(fā)展，繼續(xù)通過(guò) latemm 在機(jī)床樣機(jī)的開(kāi)發(fā)研究。一個(gè)加工中心開(kāi)發(fā)的 20212021 年在洛斯安第斯大學(xué)進(jìn)行了研究，和所獲得的結(jié)果的基礎(chǔ)上， 提出了一種新的原型。在該機(jī)床的設(shè)計(jì)和建設(shè)的動(dòng)機(jī)是為了達(dá)到更高的精度，在加工過(guò)程中，與傳統(tǒng)的車削機(jī)床生產(chǎn)的宏觀比較。一種機(jī)器，與主軸轉(zhuǎn)速高達(dá) 300 轉(zhuǎn)了 000，刀具移動(dòng)二個(gè)軸通過(guò)步進(jìn)電機(jī)連接，蝸輪蝸桿的減少，從而達(dá)到 1μ米分辨率?；?DDA 插補(bǔ)是整合程序。本機(jī)設(shè)置一個(gè)立體鏡和放大到 30 倍的可視化的加工操作。加工達(dá)到采用 NC 控制，它是可能的表征微變的皮質(zhì)骨樣品 [7] In this study, we propose the acceleration/deceleration control algorithm based on trapezoidcurve jerk in CNC machining. In aviation and mould and die industry, it is much significant to achieve high accuracy CNC machining on plex profile parts. The unsmooth Acceleration/Deceleration (ab. Acc/Dec) control in feed movement is one of the main reasons to bring about machine tools impact and vibration in practical machining. After analyzing the CNC machine tools dynamic model, an Acc/Dec control algorithm based on trapezoidcurve jerk is put forward in order to avoid step change in jerk curve in the study。 Moreover, the motion profile smooth control approach based on continuous jerk is developed in details to decrease machine tools impact according to various kinematics constraint conditions, such as the maximum acceleration, the maximum jerk, the machining program segment displacement, the instruction feedrate and so on。 Finally, the developed Acc/Dec approach and the traditional linear Acc/Dec approach are pared in the CNC experimental table. The results reveal that the developed approach can achieve more smooth and flexible motion profile, which is helpful to minish machine tools impact and enhance parts machining surface quality. 在這項(xiàng)研究中，我們提出了加速 /減速基于數(shù)控加工梯形曲線沖擊控制算法。在航空和模具行業(yè)，是實(shí)現(xiàn)高精度數(shù)控系統(tǒng)在復(fù)雜型面零件的加工更重要。不平順的加速 /減速（簡(jiǎn)稱 ACC / DEC）在進(jìn)給運(yùn)動(dòng)控制 是一個(gè)帶來(lái)實(shí)際加工機(jī)床的沖擊和振動(dòng)的主要原因。在分析了數(shù)控機(jī)床的加減速動(dòng)態(tài)模型，提出了以避免在研究反射曲線的階躍變化基于梯形曲線沖擊控制算法；此外，運(yùn)動(dòng)軌跡的平滑控制方法的基礎(chǔ)上連續(xù)反射是在細(xì)節(jié)降低機(jī)床的影響根據(jù)不同的運(yùn)動(dòng)學(xué)約束條件，如最大加速度，最大的混蛋，加工程序段位移，指令進(jìn)給速度等；最后，開(kāi)發(fā)的加速 /減速的方法和傳統(tǒng)的線性加 /減速的方法是在數(shù)控實(shí)驗(yàn)臺(tái)的比較。結(jié)果表明，所提出的方法可以實(shí)現(xiàn)更光滑柔軟的運(yùn)動(dòng)軌跡，有助于減小機(jī)床的影響，提高零件的加工表面質(zhì)量。 [8] A pound process that integrates end electrical discharge (ED) milling and mechanical grinding to machine silicon carbide (SiC) ceramics is developed in this paper. The process employs a turntable with several uniformlydistributed cylindrical copper electrod
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