富士伺服系統的(de)(de)(de)數控(kong)(kong)(kong)在(zai)實(shi)際運用生(sheng)(sheng)產中(zhong),由(you)于大(da)量存(cun)在(zai)一些用開(kai)關(guan)量控(kong)(kong)(kong)制(zhi)(zhi)(zhi)(zhi)(zhi)的(de)(de)(de)簡單的(de)(de)(de)程(cheng)(cheng)序(xu)(xu)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)(zhi)(zhi)過程(cheng)(cheng),而(er)實(shi)際生(sheng)(sheng)產工(gong)藝(yi)和(he)(he)(he)流程(cheng)(cheng)又是經常變(bian)(bian)化的(de)(de)(de),因而(er)傳統的(de)(de)(de)繼電(dian)(dian)器接觸式控(kong)(kong)(kong)制(zhi)(zhi)(zhi)(zhi)(zhi)系統常不(bu)能(neng)滿足(zu)這(zhe)種(zhong)要(yao)求,因此(ci)曾出(chu)(chu)現(xian)了(le)繼電(dian)(dian)器接觸控(kong)(kong)(kong)制(zhi)(zhi)(zhi)(zhi)(zhi)和(he)(he)(he)電(dian)(dian)子(zi)(zi)技術(shu)相(xiang)結(jie)合的(de)(de)(de)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)(zhi)(zhi)裝置(zhi),叫做(zuo)順(shun)序(xu)(xu)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)(zhi)(zhi)器。它(ta)(ta)能(neng)根據生(sheng)(sheng)產需要(yao)改(gai)變(bian)(bian)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)(zhi)(zhi)程(cheng)(cheng)序(xu)(xu),而(er)又遠比電(dian)(dian)子(zi)(zi)計算機(ji)結(jie)構(gou)簡單,價格低廉,它(ta)(ta)是通(tong)過組(zu)合邏(luo)輯元件插接或編程(cheng)(cheng)來(lai)實(shi)現(xian)繼電(dian)(dian)器接觸控(kong)(kong)(kong)制(zhi)(zhi)(zhi)(zhi)(zhi)的(de)(de)(de)。但它(ta)(ta)的(de)(de)(de)裝置(zhi)體積大(da),功能(neng)也(ye)受到(dao)一定限制(zhi)(zhi)(zhi)(zhi)(zhi)。隨著大(da)規模集成電(dian)(dian)路和(he)(he)(he)微處理機(ji)技術(shu)的(de)(de)(de)發展及(ji)應(ying)用,上(shang)述(shu)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)(zhi)(zhi)技術(shu)也(ye)發生(sheng)(sheng)了(le)根本性(xing)的(de)(de)(de)變(bian)(bian)化,在(zai)上(shang)世紀(ji)70年代出(chu)(chu)現(xian)了(le)將(jiang)計算機(ji)的(de)(de)(de)存(cun)儲技術(shu)引入順(shun)序(xu)(xu)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)(zhi)(zhi)器,產生(sheng)(sheng)了(le)新型工(gong)業(ye)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)(zhi)(zhi)器——可(ke)編程(cheng)(cheng)序(xu)(xu)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)(zhi)(zhi)器(PLC),日本富(fu)士伺服系統它(ta)(ta)兼(jian)備了(le)計算機(ji)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)(zhi)(zhi)和(he)(he)(he)繼電(dian)(dian)器控(kong)(kong)(kong)制(zhi)(zhi)(zhi)(zhi)(zhi)系統兩(liang)方面的(de)(de)(de)優(you)點,故目前在(zai)世界各(ge)國已(yi)作(zuo)為一種(zhong)標準化通(tong)用裝置(zhi)普遍應(ying)用于工(gong)業(ye)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)(zhi)(zhi)。
為解決(jue)(jue)占機(ji)(ji)械總加工(gong)量80%左右的(de)單件和(he)小批量生(sheng)產的(de)自(zi)(zi)動(dong)化難題,50年(nian)代出(chu)現(xian)了數(shu)(shu)控(kong)(kong)(kong)機(ji)(ji)床(chuang)。它綜合應(ying)用了電子、計算機(ji)(ji)、檢測、自(zi)(zi)動(dong)控(kong)(kong)(kong)制和(he)機(ji)(ji)床(chuang)結構設計等(deng)各(ge)個技(ji)術(shu)領域(yu)的(de)最新技(ji)術(shu)成就,它是(shi)典型的(de)機(ji)(ji)電一(yi)體化產品。數(shu)(shu)控(kong)(kong)(kong)機(ji)(ji)床(chuang)經過40年(nian)來的(de)發(fa)(fa)展,品種日(ri)益增多,性能(neng)不斷(duan)完(wan)善,其中(zhong)以輪(lun)廓控(kong)(kong)(kong)制的(de)數(shu)(shu)控(kong)(kong)(kong)機(ji)(ji)床(chuang)和(he)帶(dai)有自(zi)(zi)動(dong)換刀(dao)裝置和(he)工(gong)作(zuo)臺能(neng)自(zi)(zi)動(dong)轉位的(de)數(shu)(shu)控(kong)(kong)(kong)加工(gong)中(zhong)心發(fa)(fa)展更為迅速。數(shu)(shu)控(kong)(kong)(kong)機(ji)(ji)床(chuang)由控(kong)(kong)(kong)制介質、數(shu)(shu)控(kong)(kong)(kong)裝置、伺服系統和(he)機(ji)(ji)床(chuang)本體等(deng)部分組(zu)成,其中(zhong)富士伺服系統的(de)性能(neng)是(shi)決(jue)(jue)定數(shu)(shu)控(kong)(kong)(kong)機(ji)(ji)床(chuang)加工(gong)精度和(he)生(sheng)產率的(de)主要因素之一(yi)。
富士伺服(fu)系統在數控加工(gong)中的(de)作用及組成
在自(zi)動(dong)(dong)控制(zhi)系(xi)統(tong)中,把輸出量(liang)能(neng)以一定準確度跟隨輸入(ru)量(liang)的變化而變化的系(xi)統(tong)稱為隨動(dong)(dong)系(xi)統(tong),亦稱伺服系(xi)統(tong)。數控機床的伺服系(xi)統(tong)是指以機床移動(dong)(dong)部件的位置和速度作為控制(zhi)量(liang)的自(zi)動(dong)(dong)控制(zhi)系(xi)統(tong),又稱為隨動(dong)(dong)系(xi)統(tong)。
日(ri)本進口富士(shi)伺(si)(si)服(fu)系統由伺(si)(si)服(fu)驅動(dong)裝置(zhi)和驅動(dong)元(yuan)件組成,高性能的伺(si)(si)服(fu)系統還(huan)有檢測裝置(zhi),反饋實(shi)際的輸出狀態。
數控(kong)機(ji)床富士(shi)伺服系(xi)統的(de)作用(yong)在于接受來自數控(kong)裝置的(de)指令信號,驅動機(ji)床移動部件跟隨指令脈(mo)沖運動,并保證動作的(de)快速和(he)準確(que),這就要(yao)求高質量的(de)速度和(he)位(wei)置伺服。以上指的(de)主要(yao)是進給伺服控(kong)制(zhi),另外(wai)還有對主運動的(de)伺服控(kong)制(zhi),不(bu)(bu)過(guo)控(kong)制(zhi)要(yao)求不(bu)(bu)如前者高。數控(kong)機(ji)床的(de)精度和(he)速度等技術指標往往主要(yao)取決于伺服系(xi)統。
隨(sui)著生產力(li)不斷(duan)發展,要(yao)求伺服系統向(xiang)高精度、高速度、大功(gong)率方向(xiang)發展。
1、充分利用迅速發展的(de)電(dian)(dian)子和計算機(ji)技術,采(cai)用數字式伺(si)服系統,利用微機(ji)實現(xian)調(diao)節控制(zhi),增強軟(ruan)件控制(zhi)功能(neng)(neng),排除模擬電(dian)(dian)路的(de)非線(xian)性(xing)誤差和調(diao)整誤差以及溫度(du)漂移(yi)等因素的(de)影響,這可大(da)大(da)提(ti)高伺(si)服系統的(de)性(xing)能(neng)(neng),并為(wei)實現(xian)最優控制(zhi)、自適應控制(zhi)創(chuang)造(zao)條件。
2、開發高精度、快速檢測元件。
3、開發高性能(neng)的伺(si)服(fu)(fu)電機(執行元件(jian))。目前交流伺(si)服(fu)(fu)電機的變速比已達1∶10000,使用日益增(zeng)多。無(wu)刷(shua)電機因無(wu)電刷(shua)和換向片零部(bu)件(jian),加速性能(neng)要(yao)比直流伺(si)服(fu)(fu)電機高兩倍,維(wei)護也較方便,常用于高速數(shu)控機床。
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