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YHG1型冶金設備標準(zhun)液壓(ya)缸(gang)

Y-HG1型冶金設(she)備(bei)標準液壓缸，為(wei)(wei)(wei)(wei)雙作用單活塞桿液壓缸，缸徑從40~320mm共有17種規(gui)格，額定壓力為(wei)(wei)(wei)(wei)16MPa，可以帶緩沖(chong)裝(zhuang)置。該系列液壓缸有13種安(an)裝(zhuang)連接型式(shi)，除軸向腳架式(shi)外(wai)，安(an)裝(zhuang)連裝(zhuang)尺寸(cun)均符合(he)(he)ISO6021/1-1981的(de)規(gui)定。活塞桿端螺紋亦(yi)符合(he)(he)GB2350-80的(de)規(gui)定。適用于工作溫度為(wei)(wei)(wei)(wei)-30C~+80C，工作介質為(wei)(wei)(wei)(wei)液壓油(you)，乳化液的(de)冶金設(she)備(bei)（不適用于磷酸脂(zhi)）。

采(cai)用(yong)滾壓加工，由于表(biao)(biao)(biao)面層(ceng)(ceng)(ceng)留(liu)有表(biao)(biao)(biao)面殘余壓應(ying)力，有助于表(biao)(biao)(biao)面微(wei)小(xiao)裂紋(wen)的(de)(de)(de)封閉，阻礙(ai)侵蝕作(zuo)(zuo)用(yong)的(de)(de)(de)擴展。從(cong)而(er)提(ti)高表(biao)(biao)(biao)面抗腐蝕能(neng)(neng)力，并(bing)能(neng)(neng)延緩疲(pi)勞(lao)裂紋(wen)的(de)(de)(de)產生或擴大(da)，因而(er)提(ti)高缸筒疲(pi)勞(lao)強度。通(tong)過滾壓成型，滾壓表(biao)(biao)(biao)面形(xing)成一層(ceng)(ceng)(ceng)冷作(zuo)(zuo)硬(ying)化(hua)層(ceng)(ceng)(ceng)，減(jian)(jian)少了(le)磨(mo)削副接觸表(biao)(biao)(biao)面的(de)(de)(de)彈性(xing)和塑性(xing)變(bian)形(xing)，從(cong)而(er)提(ti)高了(le)缸筒內(nei)壁的(de)(de)(de)耐磨(mo)性(xing)，同時避免了(le)因磨(mo)削引起的(de)(de)(de)shao傷(shang)。滾壓后，表(biao)(biao)(biao)面粗(cu)糙度值的(de)(de)(de)減(jian)(jian)小(xiao)，可提(ti)高配(pei)合性(xing)質。

零部件加(jia)工(gong)(gong)(gong)(gong)(gong)(gong)精(jing)度(du)(du)(du)(du)(du)的影響問題(ti)，在(zai)液(ye)壓缸的制造過程中應嚴格(ge)控制缸體(ti)內壁(bi)和(he)活(huo)(huo)塞(sai)桿表(biao)面加(jia)工(gong)(gong)(gong)(gong)(gong)(gong)精(jing)度(du)(du)(du)(du)(du)，特別(bie)是幾何精(jing)度(du)(du)(du)(du)(du)，尤其直(zhi)線度(du)(du)(du)(du)(du)是關鍵，在(zai)國內加(jia)工(gong)(gong)(gong)(gong)(gong)(gong)工(gong)(gong)(gong)(gong)(gong)(gong)藝(yi)中，活(huo)(huo)塞(sai)桿表(biao)面的加(jia)工(gong)(gong)(gong)(gong)(gong)(gong)基本上是車后磨(mo)(mo)削，保證直(zhi)線度(du)(du)(du)(du)(du)問題(ti)不大，但對于缸體(ti)內壁(bi)的加(jia)工(gong)(gong)(gong)(gong)(gong)(gong)，其加(jia)工(gong)(gong)(gong)(gong)(gong)(gong)方法(fa)很多(duo)，有(you)鏜(tang)削-滾(gun)壓、鏜(tang)削-珩(heng)磨(mo)(mo)、直(zhi)接珩(heng)磨(mo)(mo)等(deng)，但由于國內材料的基礎水平較國外有(you)差距，管(guan)材坯料直(zhi)線度(du)(du)(du)(du)(du)差，壁(bi)厚不均勻、硬度(du)(du)(du)(du)(du)不均勻等(deng)因素，往往直(zhi)接影響缸體(ti)內壁(bi)加(jia)工(gong)(gong)(gong)(gong)(gong)(gong)后的直(zhi)線度(du)(du)(du)(du)(du)，因此建議采用鏜(tang)削-滾(gun)壓、鏜(tang)削-珩(heng)磨(mo)(mo)工(gong)(gong)(gong)(gong)(gong)(gong)藝(yi)，如直(zhi)接珩(heng)磨(mo)(mo)，則必須首先提高管(guan)材坯料的直(zhi)線度(du)(du)(du)(du)(du)。

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　　在(zai)允許(xu)的(de)情況(kuang)下，液壓缸(gang)的(de)缸(gang)體壁(bi)厚安全系數盡(jin)量選大(da)一些，使缸(gang)體厚壁(bi)增加，特(te)別是高壓工(gong)況(kuang)下使用的(de)油缸(gang)，以減小(xiao)油壓下的(de)缸(gang)體變形，變形后的(de)缸(gang)體也會引起液壓缸(gang)低(di)速爬行(xing)。