本文關(guān)鍵詞：特種傳動(dòng)曲面五軸銑削工藝方法及工藝參數(shù)優(yōu)化研究　出處：《大連理工大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 特種傳動(dòng)曲面 五軸銑削 銑削力 預(yù)測(cè)模型 工藝參數(shù)優(yōu)化

【摘要】：節(jié)能化、精密化高端裝備的發(fā)展對(duì)傳動(dòng)系統(tǒng)的傳動(dòng)精度提出了更高要求。球漸開(kāi)線弧齒錐齒輪是高端裝備內(nèi)部傳動(dòng)系統(tǒng)必不可少的關(guān)鍵部件,基于格里森制切齒方法的固有缺陷制約了其傳動(dòng)精度及加工精度的提高。為突破現(xiàn)有弧齒錐齒輪加工機(jī)制,以提高弧齒錐齒輪加工精度,進(jìn)而以提高傳動(dòng)精度為目標(biāo),研究球漸開(kāi)線齒形曲面的通用五軸數(shù)控加工技術(shù)。然而復(fù)雜曲面各點(diǎn)幾何特征的非一致性導(dǎo)致五軸銑削過(guò)程刀具切削面積具有時(shí)變性,從而引起銑削力的劇烈波動(dòng),影響加工質(zhì)量、刀具壽命,甚至導(dǎo)致機(jī)床振動(dòng),如何在提高球面漸開(kāi)線弧齒錐齒輪制造效率情況下減小銑削力波動(dòng)以提高該類零件的加工質(zhì)量是該領(lǐng)域一項(xiàng)亟需解決的問(wèn)題。本文突破傳統(tǒng)專用機(jī)床加工方法實(shí)現(xiàn)特種傳動(dòng)曲面五軸數(shù)控機(jī)床切齒方法,并建立一種基于主軸轉(zhuǎn)速及刀具切削面積的新型五軸加工銑削力預(yù)測(cè)模型以完成特種傳動(dòng)曲面加工主軸轉(zhuǎn)速優(yōu)選,進(jìn)而在表面粗糙度的影響規(guī)律研究的基礎(chǔ)上的工藝參數(shù)優(yōu)化,具體研究?jī)?nèi)容如下：首先,根據(jù)球漸開(kāi)數(shù)學(xué)方程及弧齒錐齒輪成形原理準(zhǔn)確完成特種傳動(dòng)曲面參數(shù)化建模,建模時(shí)依次導(dǎo)入球漸開(kāi)線數(shù)學(xué)模型、添加齒輪尺寸參數(shù)、掃掠齒廓并旋轉(zhuǎn)變換、陣列,其中掃掠齒廓并旋轉(zhuǎn)變換為建模難點(diǎn)；依照特種傳動(dòng)曲面的幾何特征,在UG的加工模塊環(huán)境下,設(shè)計(jì)以側(cè)刃驅(qū)動(dòng)體方式走刀的加工軌跡,并且根據(jù)模型大小對(duì)齒形面和齒根采用不同大小的刀具；初選五軸數(shù)控機(jī)床加工工藝參數(shù)主軸轉(zhuǎn)速且切深和進(jìn)給量采取經(jīng)驗(yàn)參數(shù)值以完成特種傳動(dòng)曲面的五軸銑削加工。其次,分析球頭銑刀的切觸狀態(tài),經(jīng)過(guò)對(duì)切削刃曲線方程的研究完成實(shí)際加工中切削過(guò)程的MATLAB仿真,分析并計(jì)算每時(shí)刻切觸區(qū)域的范圍,根據(jù)切深、進(jìn)給量、曲面幾何特征、切削刃曲線計(jì)算切削厚度,經(jīng)過(guò)切削厚度對(duì)切削高度的積分計(jì)算,建立刀具切削面積的數(shù)學(xué)模型；設(shè)計(jì)并加工了具有特種傳動(dòng)曲面特征的實(shí)驗(yàn)載體,測(cè)得不同主軸轉(zhuǎn)速下銑削力變化的數(shù)據(jù),經(jīng)過(guò)濾波處理后,最后以主軸轉(zhuǎn)速和刀具切削面積為變量完整地得出新型銑削力預(yù)測(cè)模型的顯式關(guān)系式。最后,在主軸轉(zhuǎn)速優(yōu)選情況下,檢測(cè)不同工藝參數(shù)下加工的表面粗糙度,進(jìn)而得出最佳的工藝參數(shù)；利用該參數(shù)進(jìn)行全齒切削實(shí)驗(yàn)對(duì)優(yōu)化后工藝參數(shù)進(jìn)行驗(yàn)證,并檢測(cè)該五軸數(shù)控加工技術(shù)下加工零件的齒輪精度及表面粗糙度,加工結(jié)果表現(xiàn)良好。
[Abstract]:The development of high - end equipment for energy saving and precision puts forward higher requirements for transmission precision of transmission system. Ball involute spiral bevel gear is an essential part of the internal drive system of high-end equipment. The inherent defects of Gleason based cutting method restrict its transmission accuracy and machining accuracy. In order to break through the existing spiral bevel gear processing mechanism and improve the machining accuracy of spiral bevel gear, and further improve the transmission accuracy, the universal five axis NC machining technology of spherical involute tooth profile is studied. However, the non consistency of complex surface geometric characteristics of each point lead to five axis milling cutter cutting area with time-varying volatility, thereby causing the milling force, affects the machining quality and tool life, and even lead to the vibration of the machine tool, how to reduce the fluctuation of milling force in improving the spherical involute spiral bevel gear manufacturing conditions to improve the processing efficiency the quality of this kind of parts in this field is an urgent problem. This paper breaks through the traditional processing method of special machine tool special drive surface of five axis NC machine tool cutting method, and to establish a predictive model to complete the special transmission surface machining spindle speed optimization based on model of five axis machining milling spindle speed and cutting area, and the surface roughness parameters of influence based on the study of optimization rules and the specific contents are as follows: firstly, according to the mathematical equation of ball involute and spiral bevel gear transmission principle of special surface parametric modeling of accurate modeling of involute ball turn into mathematical model, add gear parameters and sweep tooth profile and rotation, which swept array, tooth profile and rotation transformation for modeling according to the characteristics of special transmission difficulties; geometric surface, in the environment of UG processing module, trajectory design of feed to the side edge of the driving body, and According to the size of the model, different sizes of cutting tools are adopted for the tooth surface and root. The five axis NC machine tool is selected to process the technological parameters and spindle speed, and the depth and feed are taken as empirical parameters to complete the five axis milling of the special transmission surface. Secondly, contact state analysis of ball end milling, after the study on the cutting edge curve equation MATLAB to complete the simulation of cutting process in actual processing, analysis and calculation of each time range contact area, according to the depth of cut, feed rate, cutting edge geometry, surface curve of cutting thickness, cutting through the thickness of the integral the cutting height calculation, establish the mathematical model of cutting area; design and experimental carrier has a special transmission characteristics of surface processing, the measured variation of milling force under different spindle speed data, after filtering processing, and finally to the spindle speed and cutting area as variables obtained new explicit relation model of milling force prediction the type. Finally, in the case of spindle speed optimization, surface detection under different process parameters and processing roughness, and the optimum parameters; full tooth cutting experiment to verify the optimum parameters using this parameter, and detecting the gear precision and surface processing of parts of the five axis NC machining of the roughness, processing results good performance.
【學(xué)位授予單位】：大連理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TG54

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本文編號(hào)：1346811