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1、摘要普通機(jī)床的經(jīng)濟(jì)型數(shù)控改造主要是在合理選擇數(shù)控系統(tǒng)的前提下，然后再對(duì)普通機(jī)床進(jìn)行適當(dāng)?shù)臋C(jī)械改造，改造的內(nèi)容主要包括：(1)床身的改造，為使改造后的機(jī)床有較好的精度保持性，除盡可能地減少電器和機(jī)械故障的同時(shí)，應(yīng)充分考慮機(jī)床零部件的耐磨性，尤其是機(jī)床導(dǎo)軌。為此，本例中采用舊床身淬火并貼膜。(2)拖板的改造，拖板是數(shù)控系統(tǒng)直接控制的對(duì)象，所以對(duì)其改造尤顯重要。這中間最突出一點(diǎn)就是選用滾珠絲杠代替滾動(dòng)絲杠，提高了傳動(dòng)的靈敏性和降低功率步進(jìn)電機(jī)力矩?fù)p失。(3)變速箱體的改造，由于采用數(shù)控系統(tǒng)控制，所以要對(duì)輸入和輸出
2、軸以及減速齒輪進(jìn)行設(shè)計(jì)，從而再對(duì)箱體進(jìn)行改造。(4)刀架的改造，采用數(shù)控刀架，這樣可以用數(shù)控系統(tǒng)直接控制，而且刀架體積小，重復(fù)定位精度高，安全可靠。通過對(duì)機(jī)床的改造并根據(jù)要求選用步進(jìn)電機(jī)作為驅(qū)動(dòng)元件，這樣改造后的機(jī)床就能基本滿足現(xiàn)代化的加工要求。關(guān)鍵詞：普通機(jī)床，數(shù)控改造，步進(jìn)電機(jī)，經(jīng)濟(jì)型數(shù)控系統(tǒng)，數(shù)控刀架IAbstractCNCmachinetools,generaltransformationoftheeconomymainlyintherationalchoiceunderthepremiseofnu
3、mericalcontrolsystem,andthenonthelatheappropriatemechanicaltransformation,transformationshouldinclude:(1)thetransformationofbed,forthetransformationofpost-precisionmachinetoolshavebetterretention,inadditiontoasmuchaspossibletoreducetheelectricalandmechanic
4、alfailuresatthesametime,shouldgivefullconsiderationtothewearresistanceofmachineparts,especiallytheMachineTool.Tothisend,inthiscasetheoldbedquenching,andfoil.(2)thetransformationofextensionunits,extensionunitsisthedirectcontrolofCNCsystemobject,soitstransfo
5、rmationutmostimportance.Thisisthemiddleofthemostprominentpointischoseninsteadofrollingscrewballscrewtoimprovethesensitivityofthetransmissionandtorquesteppermotortoreducepowerlosses.(3)Thegearboxofthetransformation,duetoadoptnumericalcontrolsystem,sotheinpu
6、tandoutputshaftaswellasthereductiongeardesign,whichthentransformtothebox.(4)thetransformationoftoolcarrier,usingCNCturret,sothatyoucanusethedirectcontrolofCNCsystem,andknifesmallsize,highrepeatpositioningaccuracy,safeandreliable.Throughthetransformationofm
7、achinetoolsandarerequiredtousesteppermotorasthedrivingelement,sothataftertransformation,modernizationofmachinetoolswillbeabletobasicallymeettheprocessingrequirements.Keywords:Ordinarylathe,numericalcontroltransformation,steppermotor,economicalCNCsystem,CNC
8、turret27目錄第一章緒論1第二章設(shè)計(jì)要求32.1總體方案設(shè)計(jì)要求32.2設(shè)計(jì)參數(shù)42.3其它要求5第三章進(jìn)給伺服系統(tǒng)機(jī)械部分設(shè)計(jì)與計(jì)算63.1進(jìn)給系統(tǒng)機(jī)械結(jié)構(gòu)改造設(shè)計(jì)63.2進(jìn)給伺服系統(tǒng)機(jī)械部分的計(jì)算與選型63.2.1確定系統(tǒng)的脈沖當(dāng)量73.2.2縱向滾珠絲杠螺母副的副的型號(hào)選擇雨校核步驟73.2.3橫向滾珠絲杠螺母副的型號(hào)選擇與校核步驟103.2.4齒輪有關(guān)計(jì)算12第四章步進(jìn)電動(dòng)機(jī)的計(jì)算與選型194.1步
