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1、本科畢業(yè)設(shè)計(jì)(論文)題目:車(chē)床組合夾具設(shè)計(jì)系別:機(jī)電信息系專(zhuān)業(yè):機(jī)械設(shè)計(jì)制造及其自動(dòng)化班級(jí):學(xué)生:學(xué)號(hào):指導(dǎo)教師:2013年5月I車(chē)床組合夾具設(shè)計(jì)摘要根據(jù)六點(diǎn)定位原理和定位基準(zhǔn)的選擇原則,采用長(zhǎng)V型塊,支承塊和定位擋鐵定位。長(zhǎng)V型塊置于拱形肋板后限制x軸的兩自由度和z軸的兩自由度,擋鐵置于孔端限制繞y軸旋轉(zhuǎn)的自由度,支承塊置于肋板下方限制沿y軸移動(dòng)的自由度。依據(jù)相關(guān)原理計(jì)算定位誤差。根據(jù)夾緊方式的選擇原則,選擇夾緊元件為壓板壓頭和V型塊,然后通過(guò)切削力進(jìn)行夾緊力的計(jì)算。夾緊的動(dòng)力裝置選用手動(dòng)壓緊裝置。按照定位元件和夾緊元件設(shè)計(jì)連接件。以所選元件和裝置為基礎(chǔ)確定夾具總體布局和夾具體的結(jié)構(gòu)形式,并
2、確定好定位元件在夾具體上的位置。繪制夾具方案設(shè)計(jì),進(jìn)行工序精度分析。對(duì)以上設(shè)計(jì)進(jìn)行審核。最后設(shè)計(jì)夾具總裝配圖。關(guān)鍵詞:組合夾具;定位;夾緊;三通接頭IILathemodularjigandfixturedesignAbstractAccordingtosixlocalizationsprinciplesandselectionprincipleofthelocalizationdatum,usingthelongVblock,thesupportingblockandthelocalizationcomestruethehardlocalization.ThelongVblockputtedi
3、nthearchribbedplatetolimittwodegreesoffreedominthexaxisandthezaxestwodegreesoffreedom,theironputtedintheholeendlimittothedegreeoffreedomwhichcircletheyrotationofaxis,thesupportingblockputtedundertheribbedplatetolimitdegreeoffreedomalongtheyaxismigration.Positionerrorisreckonedbythecorrelationprincip
4、le.Accordingtothewayoftheselectionprinciple,dischargeheadandVblockisselectedtoclampthepart.Thencomputationofthestrengthisachievedbycarryingonthroughthecuttingforceclamps.Thepowerofclampsisfromthehydraulicunit.Designofbridgepieceisaccordingtothelocationpartandtheclamppart.Theguidepartdesigninginthist
5、opicisnotrequestedbecausethecutterbarisshort.Otherpartsandequipmentaredesignedfollowinglastprocess.Thejigoverallarrangementandconcretestructureofthebodyclamparedeterminedwiththeabovepartandtheequipment.Thepositionofthecomponentsinthekitsspecificlocationmustbeguaranteed,andthendesignthejig,carryonthe
6、workingprocedureprecisionanalysis.Thedesignreviewisfollowing.Finallythejigassemblydrawingisachieved.Keywords:Modularjigandfixture;location;clamp;unionteeIII目錄1緒論11.1概述11.1.1車(chē)床夾具的分類(lèi)11.1.2夾具的組成21.1.3夾具體31.1.4車(chē)床夾具在機(jī)械加工中的作用31.1.5車(chē)床夾具在車(chē)床中的地位及作用31.1.6國(guó)內(nèi)外夾具的發(fā)展與趨勢(shì)41.2夾具研究現(xiàn)狀51.2.1機(jī)床夾具的現(xiàn)狀51.2.2現(xiàn)代機(jī)床夾具的發(fā)展方向61.3
7、國(guó)內(nèi)外對(duì)組合夾具的發(fā)展及研究狀況71.3.1國(guó)內(nèi)對(duì)組合夾具的發(fā)展?fàn)顩r71.3.2國(guó)外對(duì)組合夾具的發(fā)展?fàn)顩r81.4本文主要研究?jī)?nèi)容92零件分析102.1零件的選擇與分析102.2工藝路線(xiàn)的確定102.3總體設(shè)計(jì)中對(duì)夾具設(shè)計(jì)的重要的參數(shù)113車(chē)床組合的夾具設(shè)計(jì)123.1夾具設(shè)計(jì)要求與選型123.1.1夾具設(shè)計(jì)要求123.1.2夾具的選型133.2定位和夾緊方案的確定133.2.1定位和夾緊方案的選擇分析143.3定位元件和夾緊元件的設(shè)計(jì)計(jì)算153.3.1定位元件的設(shè)計(jì)計(jì)算153.3.2夾緊機(jī)構(gòu)的設(shè)計(jì)計(jì)算163.4誤差分析計(jì)算173.4.1影響加工精度的因素173.4.2誤差的計(jì)算17IV3.4.3保證加工精度183.5夾具結(jié)構(gòu)的確定193.5.1夾具體的確定193.6夾緊力的確定213.6.1夾緊力的計(jì)算公式213.6.2夾緊力的計(jì)算224結(jié)論24參考文獻(xiàn)25致謝26