螺旋壓力機(jī)設(shè)計(jì)

電動(dòng)螺旋壓力機(jī)的發(fā)展概況1概述螺旋壓力機(jī)是一種歷史悠久的鍛壓設(shè)備，具有較人的能容量，結(jié)構(gòu)簡(jiǎn)單、調(diào)整和維護(hù)簡(jiǎn)便、沒有固定的下死點(diǎn)，能保證模鍛件精度的穩(wěn)定性。廣泛應(yīng)用于金屬模鍛、精壓、沖壓工藝以及耐火材料、陶瓷等非金屬材料的壓力加工。螺旋壓力機(jī)的設(shè)備投資、模具和鍛件成本比模鍛錘和熱模鍛壓力機(jī)便宜一半，加工余量小、鍛件精度高?，F(xiàn)代螺旋壓力機(jī)相繼采用了超載保護(hù)、力能顯示、能量預(yù)選及先進(jìn)的計(jì)算機(jī)控制系統(tǒng)和自動(dòng)送料、模具更換等輔助裝置。理論和實(shí)踐都證明螺旋壓力機(jī)工藝適應(yīng)性廣、生產(chǎn)率適中、勞動(dòng)條件好，己成為現(xiàn)代鍛壓生產(chǎn)優(yōu)選設(shè)備之一。國(guó)內(nèi)外相關(guān)企業(yè)都十分重視螺旋壓力機(jī)的開發(fā)與應(yīng)用。青島青鍛鍛壓機(jī)械有限公司開發(fā)研制了80MN摩擦螺旋壓力機(jī)，經(jīng)查證為目前國(guó)內(nèi)外最大規(guī)格的同類設(shè)備。由于摩擦壓力機(jī)傳動(dòng)效率低、功率損耗較大和結(jié)構(gòu)上的限制，規(guī)格發(fā)展受到了影響。隨著科學(xué)水平的不斷提高，螺旋壓力機(jī)的結(jié)構(gòu)形式及傳動(dòng)形式己經(jīng)有了很大的改進(jìn)。除了機(jī)械式摩擦傳動(dòng)以外，又采用了新的傳動(dòng)形式，如離合器式螺旋壓力機(jī)、液壓螺旋壓力機(jī)和電動(dòng)螺旋壓力機(jī)等。這不僅提高了螺旋壓力機(jī)的實(shí)用性、工作速度、生產(chǎn)率和可靠性，打擊力和能量也得到了很大的發(fā)展。如電動(dòng)螺旋壓力機(jī)打擊力己達(dá)到320MN,能量達(dá)到5000kJ以上。電動(dòng)螺旋壓力機(jī)自上世紀(jì)40年代研制成功以來(lái)，在國(guó)內(nèi)外得到了廣泛響應(yīng)。我國(guó)上世紀(jì)80年代由青島青鍛鍛壓機(jī)械有限公司與山東工業(yè)人學(xué)成功研制生產(chǎn)出了J58-160型1.6MN電機(jī)直驅(qū)式電動(dòng)螺旋壓力機(jī)，但因當(dāng)時(shí)電力條件和控制技術(shù)的限制而中斷了進(jìn)一步的研發(fā)工作，十分可惜。近年來(lái)，隨著科技發(fā)展，變頻技術(shù)和電子數(shù)控技術(shù)的不斷提高，電動(dòng)螺旋壓力機(jī)的開發(fā)創(chuàng)新、生產(chǎn)制造己全面展開，華中科技人學(xué)、青島青鍛鍛壓機(jī)械有限公司等，都相繼擁有了自己的技術(shù)和產(chǎn)品并迅速地推向市場(chǎng)。電動(dòng)螺旋壓力機(jī)己成為目前最具生命力的螺旋壓力機(jī)產(chǎn)品。2電動(dòng)螺旋壓力機(jī)的結(jié)構(gòu)原理2.1電機(jī)直驅(qū)式電動(dòng)螺旋壓力機(jī)電機(jī)直驅(qū)式電動(dòng)螺旋壓力機(jī)所用的電動(dòng)機(jī)是特制的，其定子殼體坐在壓力機(jī)機(jī)架的頂端，轉(zhuǎn)子軸的上端由定子殼體支撐，下端緊固在壓力機(jī)飛輪上。飛輪與螺桿采用鍵連接由推力軸承支撐在機(jī)架上，飛輪具有超載保護(hù)裝置。制動(dòng)器為抱閘形式，制動(dòng)飛輪的外緣，通氣松開，斷氣制動(dòng)。電機(jī)的熱量靠壓力機(jī)頂部的風(fēng)扇排走。壓力機(jī)的機(jī)架結(jié)構(gòu)采用預(yù)應(yīng)力組合機(jī)架，由拉桿將上橫梁、立柱和底座預(yù)緊為一體，使其具有足夠的剛度。螺母裝在滑塊上，滑塊采用四股導(dǎo)軌與機(jī)架立柱上的導(dǎo)軌配合。壓力機(jī)可根據(jù)需要配置上下頂料裝置。電機(jī)直驅(qū)式壓力機(jī)傳動(dòng)鏈短，電機(jī)驅(qū)動(dòng)飛輪旋轉(zhuǎn)沒有任何傳動(dòng)損失。工作時(shí)，風(fēng)扇轉(zhuǎn)動(dòng)、制動(dòng)器松開，同時(shí)主電機(jī)驅(qū)動(dòng)壓力機(jī)飛輪使螺桿定軸旋轉(zhuǎn)，通過(guò)安裝在滑塊上的螺母將螺旋運(yùn)動(dòng)轉(zhuǎn)換為直線運(yùn)動(dòng)，使滑塊加速下行，主電機(jī)達(dá)到預(yù)先設(shè)置的打擊能量所要求的轉(zhuǎn)速時(shí)，利用飛輪儲(chǔ)存的能量做功，使坯件成形。飛輪能量釋放后，主電機(jī)反轉(zhuǎn)，滑塊上行，當(dāng)滑塊到達(dá)設(shè)定的位置時(shí)電機(jī)自身制動(dòng)，制動(dòng)器只是在主電機(jī)斷電時(shí)抱住飛輪，制動(dòng)力矩很小。2.2經(jīng)一級(jí)齒輪傳動(dòng)的電動(dòng)螺旋壓力機(jī)電動(dòng)壓力機(jī)的另一種形式是經(jīng)一級(jí)齒輪傳動(dòng)，即電機(jī)軸上裝有一個(gè)小齒輪驅(qū)動(dòng)大齒輪正反旋轉(zhuǎn)，大齒輪(即飛輪)與螺桿連接作定軸轉(zhuǎn)動(dòng)，帶動(dòng)裝在滑塊上的螺母使滑塊做上卜直線運(yùn)動(dòng)實(shí)現(xiàn)打擊。這種形式的壓力機(jī)可由多臺(tái)電機(jī)同時(shí)驅(qū)動(dòng)大齒輪，因此可做到規(guī)格很大，目前世界最大噸位達(dá)320MN，遠(yuǎn)遠(yuǎn)大于其他模鍛設(shè)備的噸位，受到鍛造業(yè)的青睞。目前，這種壓力機(jī)采用的電機(jī)種類和控制尚不統(tǒng)一，應(yīng)用比較多的是ABB變頻器控制三相異步交流電動(dòng)機(jī)，運(yùn)用直接轉(zhuǎn)矩控制。國(guó)內(nèi)用電動(dòng)機(jī)人致有三類:一類是變頻器控制交流異步電動(dòng)機(jī)，另一類是變頻器控制交流伺服電動(dòng)機(jī)，都是運(yùn)用矢量控制技術(shù)，但兩種變頻器不一樣。還有采用開關(guān)磁阻電動(dòng)機(jī)的，但需匹配專用的控制器。上述變頻器控制交流伺服電動(dòng)機(jī)成本偏高，在大噸位壓力機(jī)上極少使用。3電動(dòng)螺旋壓力機(jī)的控制系統(tǒng)電動(dòng)螺旋壓力機(jī)的優(yōu)點(diǎn)是能量大小可調(diào)。飛輪角速度直接影響能量，因此，在打擊過(guò)程中，控制能量的大小也就是控制角速度的大小。青鍛公司采用日本安川變頻器控制特制交流異步電動(dòng)機(jī)，運(yùn)用矢量控制技術(shù)，電機(jī)采用編碼器反饋，速度控制精度提高，從而控制能量更加精確。矢量控制技術(shù)可在極短時(shí)間內(nèi)讓電機(jī)達(dá)到額定轉(zhuǎn)矩，適應(yīng)電動(dòng)螺旋壓力機(jī)低速大扭矩的要求。可通過(guò)輸入010V的電壓信號(hào)或4mAmA的電流信號(hào)對(duì)應(yīng)電動(dòng)機(jī)速度，從而控制能量大小。(1)硬件設(shè)計(jì)控制系統(tǒng)以可編程序控制器K7M-DR40U為核心，輔以數(shù)字量輸入/輸出、模擬量輸入/輸出擴(kuò)展模塊，再加上外圍的控制電路和控制對(duì)象。CPU模塊通過(guò)通訊接口與觸摸屏進(jìn)行通訊，觸摸屏負(fù)責(zé)數(shù)據(jù)的顯示和必要的參數(shù)設(shè)定;開關(guān)量輸入/輸出模塊主要負(fù)責(zé)一些開關(guān)信號(hào)的控制，模擬量輸入/輸出模塊主要負(fù)責(zé)打擊力的控制;模擬量模塊產(chǎn)生打擊力指令信號(hào)，打擊力通過(guò)觸摸屏顯示出來(lái)，變頻器采用矢量控制方式控制電機(jī)運(yùn)轉(zhuǎn)，電動(dòng)機(jī)通過(guò)傳動(dòng)機(jī)構(gòu)帶動(dòng)壓力機(jī)滑塊實(shí)現(xiàn)上下往復(fù)運(yùn)動(dòng)?？刂葡到y(tǒng)運(yùn)行時(shí)，通過(guò)安裝在機(jī)身上的接近開關(guān)檢測(cè)滑塊的位置，并根據(jù)各接近開關(guān)信號(hào)發(fā)出一系列控制指令，滿足各種操作要求。(2)軟件結(jié)構(gòu)軟件系統(tǒng)在KGL-WC環(huán)境下采用梯形圖編寫。根據(jù)螺旋壓力機(jī)控制系統(tǒng)的要求，將主程序分化為多個(gè)子程序模塊，各模塊實(shí)現(xiàn)各個(gè)功能，以便識(shí)別和修改?？刂瞥绦?qū)κ謩?dòng)和運(yùn)行分別進(jìn)行控制。下行打擊時(shí)，變頻器正向運(yùn)行觸點(diǎn)閉合，電動(dòng)機(jī)以設(shè)定好的加速時(shí)間使其達(dá)到設(shè)置的速度，此時(shí)滑塊加速運(yùn)行，達(dá)到打擊工件所需的能量(根據(jù)不同工件調(diào)節(jié)安裝在機(jī)身上接近開關(guān)的位置)，切斷變頻器正向運(yùn)行觸點(diǎn)，滑塊自由下滑打擊工件，并在打擊完畢后接受同程接近開關(guān)發(fā)出的信號(hào);如果下行打擊工件尚未達(dá)到所需能量，此時(shí)滑塊己到達(dá)下死點(diǎn)，為保護(hù)設(shè)備及變頻器必須斷開運(yùn)行信號(hào)。程序接受到滑塊同程信號(hào)后，變頻器反向運(yùn)行觸點(diǎn)閉合，電動(dòng)機(jī)以設(shè)定好的速度加速反向運(yùn)行，到達(dá)一定的位置斷開變頻器反向使能，剎車制動(dòng)，一次打擊完成。4電動(dòng)螺旋壓力機(jī)的特點(diǎn)電機(jī)直接驅(qū)動(dòng)形式的電動(dòng)螺旋壓力機(jī)，不存在電機(jī)與飛輪傳動(dòng)損失。除此之外，無(wú)論哪種驅(qū)動(dòng)形式的電動(dòng)螺旋壓力掃L都具有以下特點(diǎn):①結(jié)構(gòu)簡(jiǎn)單、緊湊，傳動(dòng)鏈短，操作維修方便，檢修工作量小，節(jié)約工時(shí)和維修費(fèi)用，運(yùn)行安全;②打擊能量可精確控制，可根據(jù)鍛件成形工藝調(diào)整打擊力和打擊能量，鍛件成形精度高，模具應(yīng)力小，模具使用壽命長(zhǎng);③采用先進(jìn)的電動(dòng)機(jī)驅(qū)動(dòng)電氣控制技術(shù)，壓力機(jī)工作時(shí)，不會(huì)對(duì)電網(wǎng)產(chǎn)生沖擊和影響其他設(shè)備的正常運(yùn)行;④滑塊靜止時(shí)，主電機(jī)不工作，電量消耗低，節(jié)約能源;⑤無(wú)固定下死點(diǎn)，不必調(diào)整模具高度，不會(huì)產(chǎn)生悶車現(xiàn)象;⑥可方便地調(diào)整行程高度，同程位置準(zhǔn)確;⑦與液壓螺旋壓力機(jī)相比，不需復(fù)雜的液壓驅(qū)動(dòng)設(shè)備，不存在液壓油泄漏污染環(huán)境和出現(xiàn)液壓故障問(wèn)題;⑧與摩擦螺旋壓力機(jī)相比，無(wú)摩擦盤、橫軸等中間傳動(dòng)裝置和摩擦帶易損件，零部件少，可靠性高，精度好。5結(jié)束語(yǔ)電動(dòng)螺旋壓力機(jī)作為一種高效、節(jié)能、環(huán)保的新型鍛壓設(shè)備，已在高精度發(fā)動(dòng)機(jī)、汽輪機(jī)的葉片，齒輪等重要零件的毛壞鍛造和精密鍛造中得到廣泛應(yīng)用?，F(xiàn)代螺旋壓力機(jī)相繼采用了超載保護(hù)、力能顯示、能量預(yù)選及先進(jìn)的計(jì)算機(jī)控制系統(tǒng)和自動(dòng)送料、模具更換等輔助裝置。理論和實(shí)踐都證明螺旋壓力機(jī)工藝適應(yīng)性廣、生產(chǎn)率適中、勞動(dòng)條件好，已成為現(xiàn)代鍛壓生產(chǎn)優(yōu)選設(shè)備之一。隨著汽車、船舶、航空、航天等工業(yè)的發(fā)展，電動(dòng)螺旋壓力機(jī)的應(yīng)用領(lǐng)域還會(huì)不斷擴(kuò)展。電動(dòng)螺旋壓力機(jī)雖已發(fā)展到了一個(gè)良好的階段，但其理論系統(tǒng)尚未完善，控制技術(shù)也在不斷探索，相信在業(yè)內(nèi)開發(fā)機(jī)構(gòu)和生產(chǎn)企業(yè)的不斷創(chuàng)新努力下，電動(dòng)螺旋壓力機(jī)的發(fā)展前景一定會(huì)更加光明。近年來(lái)，隨著科技發(fā)展，變頻技術(shù)和電子數(shù)控技術(shù)的不斷提高，電動(dòng)螺旋壓力機(jī)的開發(fā)創(chuàng)新、生產(chǎn)制造已全面展開，華中科技人學(xué)、青島青鍛鍛壓機(jī)械有限公司等，都相繼擁有了白己的技術(shù)和產(chǎn)品并迅速地推向市場(chǎng)。電動(dòng)螺旋壓力機(jī)已成為目前最具生命力的螺旋壓力機(jī)產(chǎn)品。進(jìn)一步提高螺旋壓力機(jī)的自動(dòng)化程度，使打擊力、速度、位置等參數(shù)的控制更加準(zhǔn)確、方便、將是螺旋壓力機(jī)今后繼續(xù)發(fā)展的方向。Thedevelopmentoftheelectricscrewpress1OverviewScrewpressisakindofforgingequipmentwithalonghistory,hastheperson'scapacity,simplestructure,easyadjustmentandmaintenance,havenofixedbottomdeadcenter,canguaranteethestabilityofprecisiondieforgings.Widelyusedinmetalforging,precisionpressure,stampingprocessandrefractories,ceramicsandothernon-metallicmaterialsofpressureprocessing.Thescrewpressequipmentinvestment,themoldandtheforgingcostshalfcheaperthandieforginghammerandhotdieforgingpress,smallmachiningallowance,highprecisionforgings.Modernscrewpressthathaveadoptedtheoverloadprotection,forcecandisplay,primaryenergy,andadvancedcomputercontrolsystemandthereplacementoftheautomaticfeeding,dieandotherauxiliaryequipment.Thetheoryandpracticeprovethatscrewpresstechnologyofwideadaptability,productivityismoderate,goodworkingconditions,hasbecomeoneofthepreferredequipmentfortheproductionofmodernforging.Relevantenterprisesathomeandabroadhaveattachedgreatimportancetothedevelopmentandapplicationofscrewpress.Qingdaogreenforgingforgingmachineryco.,LTD.80MNfrictionscrewpressisdeveloped,theverificationforthebiggestspecificationsofsimilarequipmentathomeandabroad.Becauseofitshighfrictionpresstransmissionefficiencyislow,thepowerlossandthelimitationofthestructure,specificationdevelopmentareaffected.Withthecontinuousimprovementofscientificlevel,thestructureofscrewpressandformhashadtheverybigimprovement.Inadditiontothemechanicalfrictiondrive,andadoptedanewformoftransmission,suchasclutchscrewpress,hydraulicscrewpress,electricscrewpressandsoon.Thisnotonlyimprovesthepracticabilityofscrewpress,theworkingspeed,productivity,andreliability,ithasreceivedalotofforceandenergydevelopment.Suchaselectricscrewpressforceof320mn,energyreachesmorethan5000kj.Successfullydevelopedtheelectricscrewpresssincethe1940s,bothathomeandabroadhasbeenwidelyresponse.InChinainthe1980sbyQingdaogreenforgingforgingmachineryco.,LTDandshandongindustrialproductionoutofthehumanismdevelopedJ58-1601.6MNmotordirectdrivingtypeelectricscrewpress,butduetothelimitationandcontroltechnologyofpowerconditionatthattimeandinterruptthefurtherresearchanddevelopmentwork,greatpity.Inrecentyears,withthedevelopmentofscienceandtechnology,frequencyconversiontechnologyandelectronicnumericalcontroltechnologyunceasingenhancement,thedevelopmentinnovation,productionofelectricscrewpressmanufacturealreadyinfullswing,Huazhongscienceandtechnologystudy,Qingdaogreenforgingforgingmachineryco.,LTD.,etc.,havehadtheirowntechnologiesandproductsandtomarketquickly.Currentofelectricscrewpresshasbecomethemostvitalityofthescrewpressproduct.2Thestructureandprinciplesoftheelectricscrewpress2.1MotordirectdrivingtypeelectricscrewpressMotordirectdrivemotorusedintheelectricscrewpressisspecial,sittinginthestatorshellpressthetopoftheframe,withthetopoftherotorshaftissupportedbythestatorshell,bottomfasteningonthepressflywheel.Flywheelandscrewadoptthekeyconnectionissupportedbythrustbearingontherack,theflywheelhasoverloadprotectiondevice.Formofbrakeforthebrake,brakewheelrim,ventilationtoloosen,barelyabletobrake.Motorheatwithpressatthetopofthefan.Presstheframestructureofprestressedcompositeframe,therodwillbepreloadedbeams,columns,andonthebaseasawhole,hastheenoughrigidity.Nutontheslider,theslideradoptfourguidecooperatewiththeguiderailoftheframecolumn.Pressupanddownaccordingtoneedtoconfigurethedevice.Motordirectdrivingtypepressshorttransmissionchain,motordrivetheflywheelrotatingnotransmissionlosses.Work,fanrotation,brakeloosen,atthesametime,themainmotordrivenpressflywheelrotatingscrewfixedaxis,byinstallingthenutonthesliderwillspiralmovementintolinearmotion,maketheslidertoacceleratedownward,mainmotorreachespresetstrikeenergywhentherequiredspeed,useenergyfromtheflywheelstoragework,maketheformingware.Flywheelenergyrelease,themainmotorreversal,slideruplink,whentheslidertosetthepositionofthemotorbrakeitself,embraceaflywheelbrakeonlywhenthemainmotorpower,brakingtorqueissmall.2.2TheprimarygeardriveelectricscrewpressAnotherformofelectricscrewpressisthelevelofgeardrive,themotorshaftisequippedwithabiggearandsmallgeardriverotation,biggear(i.e.,theflywheel)connectedtothescrewfixedaxisrotation,drivemountedontheslidernutonthesliderdolinearmotionrealizationhit.Thistypeofpresscanbemadeofmorethanonemotordrivenwheelatthesametime,socandothespecificationisverybig,istheworld'slargesttonnageof320mn,farmorethanotherforgingequipmenttonnage,getthefavouroftheforgingindustry.Atpresent,thepressbythetypesofmotorandcontrolarenotunified,theapplicationismoreABBinvertercontrolthreephaseasynchronousacmotor,usingthedirecttorquecontrol.Domesticmotortohavethreekinds:onekindistheinvertercontrolofacasynchronousmotor,anotherkindistheinverteracservomotorcontrol,vectorcontroltechnologyisused,butisnotthesameasthetwokindoffrequencyconverter.Andinthecaseofswitchedreluctancemotor,butneedtomatchadedicatedcontroller.Theinvertercontrol,acservomotorhighercostinlargetonnagepressesrarelyused.3ElectricscrewpresscontrolsystemTheadvantageofelectricscrewpressisenergysizeisadjustable.Flywheelangularvelocityaffectenergydirectly,therefore,intheprocessofblow,thesizeofthecontrolenergy,thatis,controlthesizeoftheangularvelocity.GreenforgingcompanyUSESJapanAnChuaninvertercontrolthespecialacasynchronousmotor,usingthevectorcontroltechnology,themotorwithencoderfeedback,speedcontrolprecision,thusmoreaccuratecontrolenergy.Vectorcontroltechnologycanachieveinaveryshorttimetoletmotorratedtorque,adapttotherequirementoflowspeedhightorqueelectricscrewpress.By010vinputvoltagesignalor4mamacurrentsignalcorrespondingtothemotorspeed,tocontrolthesizeoftheenergy.(1)HardwaredesignControlsystemwithprogrammablecontrollerK7M-DR40Uasthecore,supplementedbydigitalquantityinput/output,analoginput/outputmodule,combinedwithperipheralcontrolcircuitandthecontrolobject.CPUmoduletocommunicatethroughcommunicationinterfaceandtouchscreen,touchscreenisresponsiblefordatadisplayandthenecessaryparametersset;Switchinput/outputmoduleismainlyresponsibleforsomeoftheswitchsignalcontrol,analoginput/outputmoduleismainlyresponsibleforthecontroloftheforce;Forcecommandsignalanalogmodule,forcethroughthetouchscreendisplay,inverteradoptsvectorcontrolmethodofcontrollingthemotorrunning,themotorthroughatransmissionmechanismdrivesthepressramtorealizereciprocatingmovementupanddown.Controlsystemisrunning,bymeansoftheproximityswitchinstalledinthefuselagedetectthepositionoftheslider,andaccordingtotheproximityswitchsignalisaseriesofcontrolinstruction,meettherequirementsofvariousoperations.(2)SoftwarearchitectureThesoftwaresysteminKGL-WCenvironmentusingladderdiagram.Accordingtorequirementsofthecontrolsystemofscrewpress,thedifferentiationisthemainprogramsubroutinemodules,eachmoduleimplementsthefunction,inordertoidentifyandmodify.Controlprogramsandoperationcontrol,respectively.Downwardblowwhentheinverterisrunningcontactclosure,motortosetspeeduptimetosetup,theslideraccelerationrun,reachtheamountofenergyneededtocrackdownonworkpieceinstallation(accordingtothedifferentartifactsonthefuselageclosetothepositionofswitch),cutoffcontactinverterisrunning,thesliderfreefallingagainsttheworkpiece,andinthefightagainstafterthecompletionofacceptancewiththesignalfromtheproximityswitch;Ifthedownwardblowartifacthasyettoreachtheneededenergy,atthispointthesliderhasreachedthebottomdeadcenter,toprotecttheequipmentandfrequencyconvertermustbedisconnectedoperationsignal.Programreceivethesliderwithsignalprocess,thereverseoperationcontactclosure,frequencyconvertermotortosetthespeedtoacceleratethereverseoperation,todisconnecttheinvertercanreversethecertainposition,brake,completedablow4ThecharacteristicsoftheelectricscrewpressMotordrivendirectlyintheformofelectricscrewpress,thereisnomotorandtheflywheeltransmissionlosses.Inaddition,intheformofeitherdriveelectricspiralpressureandLhavethefollowingfeatures:(1)simpleandcompactstructure,transmissionchainisshort,convenientoperationandmaintenance,andmaintenanceworkloadsmall,savetimeandmaintenancecost,safeoperation;(2)energycanaccuratecontrol,forcecanbeadjustedaccordingtoforgingformingprocessandthefightagainstenergy,highprecisionforgingforming,diestressissmall,mouldservicelifeislong;(3)theuseofadvancedmotordriveelectriccontroltechnology,presswork,willnotimpactandinfluenceonpowergridnormaloperationofotherequipment;(4)thesliderstops,themainmotordoesnotwork,lowpowerconsumption,saveenergy;(5)thereisnofixedbottomdeadcenter,don'tneedtoadjustthemouldheight,won'tproducestuffycarphenomenon;6,strokeheightcanbeadjustedconveniently,andthepositionaccurately;Cruellycomparedwithhydraulicscrewpress,doesnotneedcomplexhydraulicequipment,thereisnoleakageofhydraulicoilpollutionofenvironmentandhydraulicfailureproblem;Wascomparedwithfrictionscrewpress,nofrictionplate,thehorizontalaxisandsoonintermediatetransmissiondeviceandfrictionbeltwearingparts,spareparts,highreliability,goodaccuracy.5ConclusionElectricscrewpressasakindofhighefficiency,energysaving,environmentalprotectionnewforgingequipment,hasbeeninhighprecisionengine,turbineblades,gearandotherimportantpartsofMAObadiswidelyusedinforgingandprecisionforging.Modernscrewpressthathaveadoptedtheoverloadpr