車床組合夾具的設(shè)計(jì)論文[帶圖紙].doc

本科畢業(yè)設(shè)計(jì)(論文)題目：車床組合夾具設(shè)計(jì)系別：機(jī)電信息系專業(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V型塊，支承塊和定位擋鐵定位。長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.ThelongVblockputtedinthearchribbedplatetolimittwodegreesoffreedominthexaxisandthezaxestwodegreesoffreedom,theironputtedintheholeendlimittothedegreeoffreedomwhichcircletheyrotationofaxis,thesupportingblockputtedundertheribbedplatetolimitdegreeoffreedomalongtheyaxismigration.Positionerrorisreckonedbythecorrelationprinciple.Accordingtothewayoftheselectionprinciple,dischargeheadandVblockisselectedtoclampthepart.Thencomputationofthestrengthisachievedbycarryingonthroughthecuttingforceclamps.Thepowerofclampsisfromthehydraulicunit.Designofbridgepieceisaccordingtothelocationpartandtheclamppart.Theguidepartdesigninginthistopicisnotrequestedbecausethecutterbarisshort.Otherpartsandequipmentaredesignedfollowinglastprocess.Thejigoverallarrangementandconcretestructureofthebodyclamparedeterminedwiththeabovepartandtheequipment.Thepositionofthecomponentsinthekitsspecificlocationmustbeguaranteed,andthendesignthejig,carryontheworkingprocedureprecisionanalysis.Thedesignreviewisfollowing.Finallythejigassemblydrawingisachieved.Keywords:Modularjigandfixture；location；clamp；unionteeIII目錄1緒論11.1概述11.1.1車床夾具的分類11.1.2夾具的組成21.1.3夾具體31.1.4車床夾具在機(jī)械加工中的作用31.1.5車床夾具在車床中的地位及作用31.1.6國內(nèi)外夾具的發(fā)展與趨勢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國內(nèi)外對(duì)組合夾具的發(fā)展及研究狀況71.3.1國內(nèi)對(duì)組合夾具的發(fā)展?fàn)顩r71.3.2國外對(duì)組合夾具的發(fā)展?fàn)顩r81.4本文主要研究內(nèi)容92零件分析102.1零件的選擇與分析102.2工藝路線的確定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