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摘 要
畢業(yè)設(shè)計(jì)的課題基本分為三大類,即工藝工裝設(shè)計(jì)類、組合機(jī)床設(shè)計(jì)類和計(jì)算機(jī)課題類。本課題所涉及的是第一類,設(shè)計(jì)任務(wù)為汽車后橋殼體的工藝工裝設(shè)計(jì),在殼體內(nèi)部裝有主傳動(dòng)器、差速器、半軸等傳動(dòng)機(jī)構(gòu)。
殼體起保證和支撐的作用,其主要加工表面為端面外圓、法蘭平面、彈簧座平面、以及內(nèi)孔等。
本次設(shè)計(jì)主要包括工藝規(guī)程、夾具、刀具和量具的設(shè)計(jì)。此次設(shè)計(jì)共分三個(gè)階段,即:(1)畢業(yè)實(shí)習(xí)階段(2)課題設(shè)計(jì)階段(3)考核答辯階段。結(jié)合本次設(shè)計(jì)零件的特點(diǎn),在設(shè)計(jì)中完成工藝規(guī)程一套,夾具兩套:(1)銑床夾具(2)鉆床夾具,其中,前者為手動(dòng)夾緊。另外還據(jù)任務(wù)書分別設(shè)計(jì)刀具——銑刀一把和量具——單頭雙極限卡規(guī)一套,共完成圖紙近5張,基本完成老師所交給的任務(wù)。
關(guān)鍵詞:汽車后橋;工藝分析;設(shè)計(jì)任務(wù)
ABSTRACT
The subject of the graduation project is divided into three big classes,namely the frock designing type of craft ,making up the designingtype of lathe and comper subjects basically.What this subject involved is the first kind,designing the task for the rear axle of automobile,the craft frock of the shell is designed.Equipped with the organizations of the transmission,such as main hammer mechanism actuator,differential mechanism,semi-axis,ect,within the shell.The shell plays a role in guatanteeing and support,it processes flange,spring seat plane,and interior hole round for outside of the terminal surface of surface,ect,mainly.
This design includes the design of rules of craft,jig,cutter and measuring tool mainly.This design divides three stages altogether,namely:(1)Graduation field work stage(2)Ddeign phase of subject(3)Examine the stage of replying.Combine this charateristic of designing the part,finisshes one set of rules of craft in the design,two sets of jigs:(1)Jig of the milling machine(2)The jig of the drilling machine,among them,the former,in order to clamp manually.Still design the cutter sepatately according to the task book in addition—One milling cutter is with measuring,finish drawing amount nearlu 5 altogether,finish the task that a teacher assigns basically.
Key word:The rear axle of automobile;the crafu analuses;designs the task
目錄
1 緒論 1
1.1 我國汽車后橋制造業(yè)的現(xiàn)狀及其發(fā)展趨勢 1
1.2 汽車后橋殼體的構(gòu)造 1
1.3 汽車后橋殼體的性能要求 1
2 零件的分析 3
2.1 零件的作用 3
2.2 零件的工藝分析 3
2.3 生產(chǎn)類型的確定 4
2.4 確定毛坯的制造形式 4
2.5 基面的選擇 4
3 械加工工藝路線 6
3.1 工藝方案 6
3.2 工藝方案比較分析 7
3.3 加工階段的劃分和檢驗(yàn)工序的安排 7
4 加工余量、工序、毛坯尺寸的確定 9
5 工時(shí)定額 10
5.1工序六的工時(shí)定額 10
5.2工序十三的工序定額 11
6 夾具設(shè)計(jì) 12
6.1 銑床夾具設(shè)計(jì) 12
6.1.1 工件的加工工藝分析 12
6.1.2 定方案,設(shè)計(jì)定位元件 12
6.1.3 確定夾緊方式和設(shè)計(jì)夾緊結(jié)構(gòu) 13
6.1.4 定位誤差的分析 14
6.1.5 夾緊元件的強(qiáng)度校核 14
6.1.6 夾具體的設(shè)計(jì) 15
6.1.7 夾具體設(shè)計(jì)及其操作的簡要說明 15
6.2 鉆床夾具的設(shè)計(jì) 16
6.2.1 定位基準(zhǔn)的選擇 16
6.2.2 夾緊力的確定 16
6.2.3 鉆削力的計(jì)算 16
6.2.4 動(dòng)力源設(shè)計(jì) 17
6.2.5 夾具體的設(shè)計(jì) 18
6.2.6 夾具設(shè)計(jì)及操作簡要說明 18
7 CAD繪圖簡介 20
8 量具設(shè)計(jì) 21
9 刀具設(shè)計(jì) 24
結(jié) 論 26
致 謝 27
參考文獻(xiàn) 28
附錄A 英文原文 29
附錄B 漢語翻譯 35