加工中心簡稱CNC,是由機械設備與數控系統組成的使用于加工復雜形狀工件的高效率自動化機床。加工中心又被稱電腦鑼。加工中心備有刀庫,具有自動換刀功能,是對工件一次裝夾后進行多工序加工的數控機床。加工(gong)(gong)(gong)中(zhong)心(xin)是(shi)高度機電(dian)一體化的(de)(de)產品,工(gong)(gong)(gong)件裝夾后(hou),數控(kong)系(xi)統能控(kong)制(zhi)機床按不(bu)同工(gong)(gong)(gong)序(xu)自動(dong)選擇、更(geng)換刀具、自動(dong)對刀、自動(dong)改(gai)變主軸(zhou)轉(zhuan)速、進給量(liang)等,可連續完成鉆、鏜、銑、鉸、攻絲等多種(zhong)(zhong)工(gong)(gong)(gong)序(xu),因而(er)大(da)大(da)減少了(le)工(gong)(gong)(gong)件裝夾時間、測量(liang)和機床調整等輔(fu)助工(gong)(gong)(gong)序(xu)時間,對加工(gong)(gong)(gong)形狀(zhuang)比較復雜,精度要(yao)求較高,品種(zhong)(zhong)更(geng)換頻繁的(de)(de)零件具有良(liang)好的(de)(de)經濟效(xiao)果。
數控機床實現了中、小批量加工自動化,改善了勞動條件。此外,它還具有生產率高、加工精度穩定、產品成本低等一系列優點。CNC零件加工中心廠家為了進一(yi)步發揮這些優點,數(shu)控(kong)機(ji)(ji)床(chuang)遂向“工序集中(zhong)”,即一(yi)臺數(shu)控(kong)機(ji)(ji)床(chuang)在一(yi)次裝夾零件后能完成多工序加工的數(shu)控(kong)機(ji)(ji)床(chuang)(即加工中(zhong)心)方(fang)面發展。
CNC立式加工中心的用途:
(1)期性重復投產的工件:有些產品的市場需求具有周期性和季節性,如果采用專門生產線則得不償失,用普通設備加工效率又太低,且質量不穩定,數量也難以。而采用CNC加工中心,首件(jian)(批)試(shi)切完后(hou),程序和相關(guan)生產(chan)信息可保留下(xia)來,下(xia)次產(chan)品(pin)再生產(chan)時(shi)(shi)(shi),只要(yao)很(hen)少(shao)的(de)準(zhun)備時(shi)(shi)(shi)間就可以開始生產(chan)。CNC加工(gong)(gong)(gong)中心工(gong)(gong)(gong)時(shi)(shi)(shi)包括準(zhun)備工(gong)(gong)(gong)時(shi)(shi)(shi)和加工(gong)(gong)(gong)工(gong)(gong)(gong)時(shi)(shi)(shi),CNC加工(gong)(gong)(gong)中心把很(hen)長的(de)單件(jian)準(zhun)備工(gong)(gong)(gong)時(shi)(shi)(shi)平(ping)均(jun)分(fen)配(pei)到每一個工(gong)(gong)(gong)件(jian)上,使每次生產(chan)的(de)平(ping)均(jun)實際工(gong)(gong)(gong)時(shi)(shi)(shi)減(jian)少(shao),生產(chan)周期大(da)大(da)縮短。
(2)高精度(du)工(gong)(gong)件(jian)(jian):有些工(gong)(gong)件(jian)(jian)需求甚少,但屬關鍵部件(jian)(jian),要(yao)求精度(du)高且工(gong)(gong)期短,用(yong)傳統工(gong)(gong)藝需用(yong)多臺(tai)機(ji)床協調工(gong)(gong)作,其周期長、效率低,在長工(gong)(gong)序流程中,受人為影(ying)響容易出廢(fei)品,從而造成重大(da)經(jing)濟損失(shi)。而采用(yong)CNC加(jia)工(gong)(gong)中心進行加(jia)工(gong)(gong),生產(chan)完全由程序自動控制.避(bi)免(mian)了長工(gong)(gong)序流程,減(jian)少了硬件(jian)(jian)投資及人為干擾,具有生產(chan)效益(yi)高及質量(liang)穩定的特點。
(3)批(pi)量(liang)(liang)生(sheng)產(chan)(chan)的(de)工件:CNC加(jia)(jia)工中心(xin)生(sheng)產(chan)(chan)的(de)柔性(xing)不僅(jin)體現(xian)在對(dui)(dui)特(te)殊(shu)要求的(de)快(kuai)速(su)反應(ying)上,而且可以(yi)快(kuai)速(su)實現(xian)批(pi)量(liang)(liang)生(sheng)產(chan)(chan),以(yi)提高市(shi)場競爭能力。CNC加(jia)(jia)工中心(xin)適(shi)合于中小(xiao)批(pi)量(liang)(liang)生(sheng)產(chan)(chan),特(te)別是小(xiao)批(pi)量(liang)(liang)生(sheng)產(chan)(chan),在應(ying)用CNC加(jia)(jia)工中心(xin)時(shi)。盡量(liang)(liang)使批(pi)量(liang)(liang)大于經(jing)濟批(pi)量(liang)(liang),以(yi)達到良好的(de)經(jing)濟效果。隨著CNC加(jia)(jia)工中心(xin)的(de)不斷發展,經(jing)濟批(pi)量(liang)(liang)越來越小(xiao),對(dui)(dui)一(yi)些復(fu)雜(za)工件,5-10件就可以(yi)生(sheng)產(chan)(chan),甚至單(dan)件生(sheng)產(chan)(chan)時(shi)也(ye)可以(yi)考(kao)慮用CNC加(jia)(jia)工中心(xin)。
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