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1、題目:車床后托架加工工藝及夾具設(shè)計(jì)姓名:班級(jí)學(xué)號(hào):指導(dǎo)教師:畢業(yè)論文(設(shè)計(jì))用紙摘要隨著科學(xué)技術(shù)的進(jìn)步和生產(chǎn)的發(fā)展,國民經(jīng)濟(jì)各部門要求機(jī)械工業(yè)不斷提供先進(jìn)技術(shù)裝備和研究新的產(chǎn)品品種,這就促使機(jī)械工業(yè)的生產(chǎn)形勢(shì)發(fā)生了顯著的變化。原來以通用夾具為主的傳統(tǒng)生產(chǎn)技術(shù)準(zhǔn)備工作的方式,就遠(yuǎn)遠(yuǎn)不能適應(yīng)當(dāng)前機(jī)械工業(yè)所面臨的新形勢(shì)。這就提出了多品種小批量生產(chǎn)的夾具設(shè)計(jì)和研究的課題。首先介紹了零件的作用,對(duì)零件進(jìn)行工藝分析。然后進(jìn)行工藝規(guī)程設(shè)計(jì),包括確定毛坯的制造形式、基面選擇、制定工藝路線、確定機(jī)械加工余量、工序尺寸及毛坯尺寸、確定切削用量及基本工時(shí)等。最后再進(jìn)行了三種專用夾具的設(shè)計(jì),一套是銑平面夾具設(shè)計(jì),
2、一套是鏜孔夾具設(shè)計(jì),另一套是鉆頂面四孔的夾具設(shè)計(jì)。關(guān)鍵詞:車床后托架;加工工藝設(shè)計(jì);專用夾具設(shè)計(jì);定位;夾緊佳木斯大學(xué)教務(wù)處第II頁畢業(yè)論文(設(shè)計(jì))用紙AbstractAlongwiththeprogressofthescienceandtechnologyandthedevelopmentoftheproduction,thevariousbranchesandsectorsoftheNationalEconomyrequestthemechanicalindustryunceasinglytoprovidethevanguardtechnologyequipmentandtherese
3、archattainmentproductvariety,thisurgedtheproductionsituationofthemechanicalindustrytohavearemarkablechange.Byfar,theoriginalwaybytheunitclampprimarilytraditionproductiontechnologypreparatorywork,cannotadaptthenewsituationwhichthecurrentmechanicalindustryfaces.Thisproposedthejigdesignandtheresearch
4、topicofthemulti-varietysmallbatchproduction.Firstthearticleintroducesthefunctionofthecomponentsandcarriesonthecraftanalysistothecomponents.Thencarriesonthetechnologicalprocessdesign,Includingdeterminationofthesemifinishedmaterialsmanufactureform,basicplanechoice,formulationofthecraftroute,determin
5、ationofthemachiningallowance,workingproceduresizeandsemifinishedmaterialssize,determinationofthecuttingspecificationsandbasicman-hour.Finallycarriesonthejigdesign,aplaneismilingfixturedesign,asetofisboringandfixturedesign,theotheroneisthetopfourholedrillingoffixturedesign.Keywords:lathebracketafte
6、r;processingtechnologydesign;specialjigdesign;fixedposition;clamp佳木斯大學(xué)教務(wù)處第II頁畢業(yè)論文(設(shè)計(jì))用紙目錄摘要IAbstractII第1章緒論31.1國內(nèi)外夾具發(fā)展現(xiàn)狀31.2夾具的作用3第2章CA6140機(jī)床后托架加工工藝設(shè)計(jì)62.1CA6140機(jī)床后托架的工藝分析及工藝要求62.2CA6140車床后托架的加工工藝過程72.3確定各表面加工方案82.3.1在選擇各表面加工方法時(shí),應(yīng)考慮的因素82.3.2平面加工方案的確定82.3.3孔加工方案的確定92.3.4加工工藝路線的方案比較92.4CA6140機(jī)床后托架的加工
7、余量,工序尺寸及毛坯尺寸的確定122.4.1毛坯的結(jié)構(gòu)工藝要求122.4.2CA6140機(jī)床后托架的偏差計(jì)算132.5確定切削用量及基本工時(shí)172.5.1工序1:粗、精銑底面172.5.2工序2:粗、半精、精鏜CA6140側(cè)面三杠孔182.5.3工序3:鉆頂面四孔262.5.4工序4:鉆側(cè)面兩孔302.6時(shí)間定額計(jì)算及生產(chǎn)安排322.6.1粗、精銑底面時(shí)間定額計(jì)算及生產(chǎn)安排322.6.2鏜側(cè)面三杠孔定額計(jì)算及生產(chǎn)安排33