為(wei)適應全球(qiu)制造(zao)行(xing)業(ye)的(de)(de)需(xu)求，數控系(xi)統(tong)(tong)(tong)網絡(luo)化(hua)是(shi)必(bi)然發展方(fang)向。網絡(luo)可以(yi)把(ba)世界上(shang)的(de)(de)資源進行(xing)最優配(pei)置，數控系(xi)統(tong)(tong)(tong)的(de)(de)網絡(luo)化(hua)最先是(shi)企業(ye)內(nei)部(bu)的(de)(de)數控系(xi)統(tong)(tong)(tong)網絡(luo)化(hua)，數控之(zhi)間通過企業(ye)內(nei)部(bu)局域網進行(xing)相(xiang)互通信，然后再經由因(yin)特(te)網通向企業(ye)外部(bu)，這就是(shi)所(suo)(suo)謂(wei)的(de)(de)Inter-net/Internet技術。這樣(yang)就把(ba)世界上(shang)幾乎所(suo)(suo)有的(de)(de)數控系(xi)統(tong)(tong)(tong)聯系(xi)起來(lai)，促成了世界資源的(de)(de)優化(hua)配(pei)置。
隨著加(jia)工(gong)效率(lv)的(de)(de)(de)提(ti)高，人(ren)們對物質需(xu)求(qiu)(qiu)的(de)(de)(de)大量增加(jia)，數(shu)(shu)控(kong)系(xi)(xi)統工(gong)作時(shi)間越來(lai)越長，這(zhe)就(jiu)(jiu)必(bi)(bi)然需(xu)要(yao)(yao)(yao)數(shu)(shu)控(kong)系(xi)(xi)統在(zai)(zai)長時(shi)間內(nei)能夠(gou)保證其穩定性(xing)(xing)(xing)，加(jia)工(gong)的(de)(de)(de)產品才能合格(ge)。這(zhe)就(jiu)(jiu)對數(shu)(shu)控(kong)系(xi)(xi)統提(ti)出了(le)高可(ke)靠(kao)性(xing)(xing)(xing)的(de)(de)(de)要(yao)(yao)(yao)求(qiu)(qiu)，對于每(mei)天工(gong)作兩班的(de)(de)(de)無人(ren)工(gong)廠(chang)而言，如果(guo)要(yao)(yao)(yao)求(qiu)(qiu)在(zai)(zai)16小時(shi)內(nei)連續(xu)正常工(gong)作、無故(gu)障率(lv)達99%以上，則數(shu)(shu)控(kong)車床的(de)(de)(de)平均(jun)無故(gu)障運行(xing)(xing)時(shi)間就(jiu)(jiu)必(bi)(bi)須大于3000小時(shi)。這(zhe)就(jiu)(jiu)要(yao)(yao)(yao)求(qiu)(qiu)數(shu)(shu)控(kong)配置、主軸(zhou)及伺服驅動等的(de)(de)(de)平均(jun)無故(gu)障運行(xing)(xing)時(shi)間必(bi)(bi)須在(zai)(zai)10萬小時(shi)以上。日本FANUC系(xi)(xi)統早在(zai)(zai)20世(shi)紀80年代末就(jiu)(jiu)能夠(gou)達到這(zhe)種高可(ke)靠(kao)性(xing)(xing)(xing)的(de)(de)(de)要(yao)(yao)(yao)求(qiu)(qiu)，現(xian)在(zai)(zai)正向(xiang)更(geng)高可(ke)靠(kao)性(xing)(xing)(xing)方向(xiang)發(fa)展。
在(zai)生產(chan)過(guo)程中(zhong)，往(wang)往(wang)發現(xian)(xian)這樣的(de)(de)(de)(de)現(xian)(xian)象(xiang)：一個零件(jian)本身被刀(dao)具加工(gong)(gong)(gong)(gong)的(de)(de)(de)(de)時(shi)間(jian)(jian)不長，而工(gong)(gong)(gong)(gong)人裝夾(jia)的(de)(de)(de)(de)時(shi)間(jian)(jian)有時(shi)候大于(yu)加工(gong)(gong)(gong)(gong)時(shi)間(jian)(jian)。這種在(zai)零件(jian)加工(gong)(gong)(gong)(gong)過(guo)程中(zhong)大量的(de)(de)(de)(de)無功(gong)效(xiao)時(shi)間(jian)(jian)對于(yu)生產(chan)來(lai)說是不利的(de)(de)(de)(de)，所以現(xian)(xian)代自(zi)動化(hua)高(gao)的(de)(de)(de)(de)工(gong)(gong)(gong)(gong)廠一般(ban)的(de)(de)(de)(de)數控(kong)車床(chuang)配有工(gong)(gong)(gong)(gong)件(jian)搬(ban)運、自(zi)動上下料、自(zi)動換刀(dao)等(deng)系(xi)統(tong)，可以盡可能(neng)降(jiang)低這些無功(gong)效(xiao)時(shi)間(jian)(jian)。這種能(neng)夠把多種不同功(gong)能(neng)的(de)(de)(de)(de)系(xi)統(tong)整合(he)在(zai)一臺數控(kong)車床(chuang)的(de)(de)(de)(de)過(guo)程就是數控(kong)系(xi)統(tong)的(de)(de)(de)(de)負荷(he)化(hua)。
|
