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1、實(shí)驗(yàn)一機(jī)床靜剛度的測(cè)定一實(shí)驗(yàn)?zāi)康耐ㄟ^實(shí)驗(yàn)理解和掌握:1.機(jī)床(包括夾具)——工件——刀具所組成的工藝系統(tǒng)是一彈性系統(tǒng);2.力和變形的關(guān)系不是直線關(guān)系,不符合虎克定律;3.當(dāng)載荷去除后,變形恢復(fù)不到起點(diǎn),加載曲線與卸載曲線不重合;4.部件的實(shí)際剛度遠(yuǎn)比我們想象要??;5.通過測(cè)量計(jì)算機(jī)床的靜剛度。二設(shè)備與儀器1.C616,CF6140車床;2.單向靜剛度儀、三向靜剛度儀。機(jī)床單向靜剛度的測(cè)定一實(shí)驗(yàn)原理如圖1--1所是:在C616車床的頂尖間裝上一根剛度很大的光軸Ⅰ,其受力后變形可忽略不計(jì),螺旋加力器5固定在刀架上,在加力器6與光軸間裝一測(cè)力環(huán)7,
2、在該環(huán)之內(nèi)孔中固定安裝一千分表3,當(dāng)對(duì)如圖所安裝的測(cè)力環(huán)加力時(shí),千分表3的指針就會(huì)轉(zhuǎn)動(dòng),其轉(zhuǎn)動(dòng)量與外載荷的對(duì)應(yīng)關(guān)系可在材料實(shí)驗(yàn)機(jī)上預(yù)先測(cè)出。本實(shí)驗(yàn)中測(cè)力環(huán)的變形與外載荷(0-1500N時(shí))的對(duì)應(yīng)關(guān)系見表1-1。實(shí)驗(yàn)時(shí),將測(cè)力環(huán)抵在剛性軸的中點(diǎn)處,在剛性軸靠近主軸端裝有千分表1,在剛性軸靠近尾架端裝有千分表2,在刀架處裝有千分表4,用扳手轉(zhuǎn)動(dòng)帶有方頭的加力螺桿5施一外載荷(),加載大小由千分表3的指針轉(zhuǎn)動(dòng)量所指示,千分表3的指針轉(zhuǎn)動(dòng)量與加載關(guān)系如表1—1所示,每次加載和卸載時(shí),分別記錄下千分表1,2,4的讀數(shù)。為了說明機(jī)床的靜剛度與尾座套筒的伸
3、出長(zhǎng)度有關(guān),實(shí)驗(yàn)時(shí),可將套筒分別伸出5mm和10mm后各進(jìn)行一次實(shí)驗(yàn),可對(duì)實(shí)驗(yàn)結(jié)果進(jìn)行比較。engineeringqualitymaintenancenotice(5)maintenancetaskbook6.3.2.4regularlyvisitsystemsincethisengineeringdeliveredofdayupeachquarterorganizationvisitGrouponthisengineeringforvisit,groupbyprojectmanager,andIunitsproduction,andtech
4、nology,aboutbusinesssectorheadcomposition.Inreturn,theownersofanyqualityquestionsandcomments,Iwilllisten,seriously,andmakethevisitrecord.Allconstructionqualitydefectsresponsibilityseriouslyproposesolutionsandtimelyimplementationofwarranty.Projectsecuritymanagementsectionpro
5、jectsafetymanagementsafetymanagementobjectivesoftheprojectis:toputanendtoamajoraccident,monthinjuryfrequencybelow1.2perthousand;combinedwithconstructiontocreate"safeandcivilizedconstructioninZhuhaimodelsite".OrganizationsectionIIxiaohuiwutoactasfullresponsibilityforsafetyof
6、peopleontheground,hewillbefullyresponsibleforthemechanicalandelectricalinstallationengineeringconstructionsafety.MsLinGuibocomradesresponsibleforday-to-daysecurity,training,education,andinspectionwork.Inordertopreventthepossibilityof...1,theimplementationofpoints:(1)teamass
7、ignedtotheAAisresponsiblefortheuseofinspection,andinconjunctionwiththe9二實(shí)驗(yàn)步驟1.按圖1—1把單向靜剛度儀裝在車床上,同時(shí)裝好千分表。2.把測(cè)力環(huán)抵在剛性軸的中點(diǎn)處,使千分表3的指針指零,轉(zhuǎn)動(dòng)加力螺桿5預(yù)加載荷500N后卸載(即千分表3的指針旋轉(zhuǎn)35微米),然后,重新調(diào)整千分表1,2,4,使其指針指零。3.安照表1—1所給出的測(cè)力環(huán)所受載荷與千分表指示數(shù)之間的對(duì)應(yīng)關(guān)系,千分表3的指針每轉(zhuǎn)動(dòng)7微米,等于測(cè)力環(huán)每次加載100N,順次加至1500N,把每次加載后千分表1,2,
8、4的位移數(shù)值記錄到表1—3中。表1--1測(cè)力環(huán)所受載荷(kg)0102030405060708090100110120130140150千分表指示數(shù)(μm)0714