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(chuang)。加工(gong)(gong)中心(xin)是高度(du)機電一體化的產(chan)品(pin),工(gong)(gong)件裝夾(jia)后,數控系統能控制機床(chuang)按不同(tong)工(gong)(gong)序自動(dong)選擇、更換刀具、自動(dong)對刀、自動(dong)改(gai)變主軸轉速、進給(gei)量(liang)等(deng),可連續(xu)完成鉆、鏜、銑、鉸(jiao)、攻絲等(deng)多種工(gong)(gong)序,因而大(da)大(da)減少了工(gong)(gong)件裝夾(jia)時間、測量(liang)和(he)機床(chuang)調整(zheng)等(deng)輔助工(gong)(gong)序時間,對加工(gong)(gong)形(xing)狀(zhuang)比較復雜,精度(du)要求較高,品(pin)種更換頻繁的零件具有(you)良好的經濟效果(guo)。
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(jin)一步發(fa)揮這些優點,數控機(ji)床(chuang)遂向(xiang)“工(gong)序集中”,即一臺數控機(ji)床(chuang)在一次裝夾零件后能完(wan)成多工(gong)序加工(gong)的(de)數控機(ji)床(chuang)(即加工(gong)中心)方面(mian)發(fa)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(批(pi))試切(qie)完后,程(cheng)序和相關生(sheng)產(chan)信息可(ke)保留下來,下次產(chan)品再(zai)生(sheng)產(chan)時(shi)(shi),只(zhi)要很少的準備(bei)時(shi)(shi)間就可(ke)以開始(shi)生(sheng)產(chan)。CNC加工(gong)(gong)(gong)中心(xin)工(gong)(gong)(gong)時(shi)(shi)包括準備(bei)工(gong)(gong)(gong)時(shi)(shi)和加工(gong)(gong)(gong)工(gong)(gong)(gong)時(shi)(shi),CNC加工(gong)(gong)(gong)中心(xin)把很長的單件準備(bei)工(gong)(gong)(gong)時(shi)(shi)平均(jun)分配到每一個工(gong)(gong)(gong)件上(shang),使每次生(sheng)產(chan)的平均(jun)實際(ji)工(gong)(gong)(gong)時(shi)(shi)減少,生(sheng)產(chan)周期大(da)大(da)縮短(duan)。
(2)高精度工(gong)件(jian)(jian):有(you)(you)些工(gong)件(jian)(jian)需(xu)求甚少(shao),但(dan)屬關鍵部件(jian)(jian),要求精度高且(qie)工(gong)期短,用(yong)傳統(tong)工(gong)藝需(xu)用(yong)多臺機床協(xie)調(diao)工(gong)作,其周期長(chang)(chang)、效率(lv)低,在(zai)長(chang)(chang)工(gong)序(xu)流程中,受人為(wei)影響容易(yi)出廢品,從(cong)而造(zao)成(cheng)重大經濟損失。而采用(yong)CNC加(jia)工(gong)中心進行加(jia)工(gong),生產完全(quan)由(you)程序(xu)自動控(kong)制.避免了長(chang)(chang)工(gong)序(xu)流程,減少(shao)了硬件(jian)(jian)投資及人為(wei)干擾(rao),具有(you)(you)生產效益(yi)高及質量穩(wen)定的特點。
(3)批量生(sheng)(sheng)產(chan)(chan)(chan)的(de)工(gong)(gong)件(jian)(jian):CNC加工(gong)(gong)中心生(sheng)(sheng)產(chan)(chan)(chan)的(de)柔性(xing)不僅體現(xian)在對(dui)特殊(shu)要求的(de)快(kuai)速反(fan)應上,而(er)且(qie)可(ke)以(yi)快(kuai)速實(shi)現(xian)批量生(sheng)(sheng)產(chan)(chan)(chan),以(yi)提高(gao)市場(chang)競爭能力。CNC加工(gong)(gong)中心適合于(yu)中小(xiao)批量生(sheng)(sheng)產(chan)(chan)(chan),特別是小(xiao)批量生(sheng)(sheng)產(chan)(chan)(chan),在應用CNC加工(gong)(gong)中心時(shi)。盡量使批量大于(yu)經濟(ji)批量,以(yi)達到(dao)良好的(de)經濟(ji)效果(guo)。隨著CNC加工(gong)(gong)中心的(de)不斷(duan)發展,經濟(ji)批量越來越小(xiao),對(dui)一些復(fu)雜工(gong)(gong)件(jian)(jian),5-10件(jian)(jian)就可(ke)以(yi)生(sheng)(sheng)產(chan)(chan)(chan),甚至單(dan)件(jian)(jian)生(sheng)(sheng)產(chan)(chan)(chan)時(shi)也(ye)可(ke)以(yi)考慮用CNC加工(gong)(gong)中心。
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