基于UG的斜齒輪參數(shù)化精確建模研究畢業(yè)論文.doc

本科畢業(yè)設(shè)計(jì)論文題目：基于UG的斜齒輪參數(shù)化精確建模研究學(xué)生姓名：所在院系：機(jī)電學(xué)院所學(xué)專(zhuān)業(yè)：機(jī)電技術(shù)教育導(dǎo)師姓名：完成時(shí)間：摘要傳統(tǒng)的造型方法都只是幾何要素的簡(jiǎn)單堆疊，僅描述了產(chǎn)品的幾何形狀，而不具備由于幾何尺寸變化而使圖形變換的尺寸驅(qū)動(dòng)功能。這樣一來(lái)，哪怕是要改變復(fù)雜模型的一個(gè)尺寸，也需要擦掉原有圖形，重新構(gòu)建一個(gè)新的圖形，這種簡(jiǎn)單的重復(fù)工作嚴(yán)重影響設(shè)計(jì)效率。能否建立起圖形幾何尺寸與幾何數(shù)據(jù)的關(guān)聯(lián)，通過(guò)更改數(shù)據(jù)實(shí)現(xiàn)幾何模型的變化呢？這就是參數(shù)化設(shè)計(jì)！UG作為新一代的三維造型系統(tǒng)具有先進(jìn)的參數(shù)化設(shè)計(jì)功能，本文主要分析了在UG下漸開(kāi)線生成的方法及斜齒輪參數(shù)化建模的過(guò)程，在UG下建立了斜齒輪的基本結(jié)構(gòu)模型，并且斜齒輪模型的基本尺寸參數(shù)都通過(guò)表達(dá)式加以關(guān)聯(lián)，實(shí)現(xiàn)了斜齒輪的參數(shù)化驅(qū)動(dòng)，這樣通過(guò)修改斜齒輪模型相應(yīng)的基本結(jié)構(gòu)參數(shù)就可以快速實(shí)現(xiàn)斜齒輪的三維建模。從而提高了建模速度、降低了造型難度、減少了重復(fù)性的勞動(dòng)、節(jié)約了時(shí)間、提高了設(shè)計(jì)效率。關(guān)鍵詞:UG,參數(shù)化設(shè)計(jì),表達(dá)式,斜齒輪,漸開(kāi)線0TheParameterizationDesignofHelicalgearBasedonUGAbstractTraditionalmodelmethodsareallonlythepilingpilebrieflyofkeyelementsofgeometric.Theyonlydescribethegeometricformoftheproducts,buttheycantpossessthepromotingfunctionofchangingthefiguredependsonthevarietiesofgeometricsize.Inthiscase,evenchangingassizeofthecomplicatedmodel,itneedstowipeofftheoriginalfigure,andconstructanewfigureagain.Suchsimplerepeatedwokinfluencestheefficiencyofdestgningseriously.Whethercanitsetuprelationshipbetweenthegeometricsizeofthefigureandgeometricdataandgeometricdataandsealizethechangeofthegeometricmodelthroughchangingthedata?Thisisthedesignofparameter!UGhasadvancedfunctionofdesigningbyparameterastri-dimensionalmodelsystemofnewgeneration.Thepapermainlyanalysisthemethodofinvolutesgenerationandthebuildingcourseofthehelicalhelicalgearparametricdesign,andthebasicsizeparameterofhelicalgearmodelislinkedwitheachotherthroughexpression,thedriveofthehelicalgearparametercanbeachieved,thehelicalgearfastthree-dimensionalbuildmouldcanrealizedthroughmodifyingthebasicstructuralparameterofcorrespondinghelicalgearmodel.Itrisespeedofbuildingmould,reducemodelingdifficultyandtherepeatabilitylabors,savetime,raisedesignefficiency.Keywords:UG，Parametricdesign，Expression，helicalgear，Involutes目錄1緒論.12UG的參數(shù)化設(shè)計(jì)概念.13斜齒輪參數(shù)化設(shè)計(jì)過(guò)程.23.1漸開(kāi)線的形成原理.23.242齒以下斜齒輪的繪制.33.2.1斜齒輪基本曲線的輪廓繪制.33.2.2漸開(kāi)線表達(dá)式建立與生成.53.2.3齒廓的生成.63.2.4單個(gè)輪齒的生成.73.2.5齒輪生成.93.341齒以上斜齒輪繪制.103