磨(mo)床運動(dong)(dong)(dong)(dong)(dong)控(kong)制(zhi)(zhi)(zhi)中的振(zhen)(zhen)動(dong)(dong)(dong)(dong)(dong)抑制(zhi)(zhi)(zhi)技(ji)術(shu)是提升磨(mo)削(xue)表面(mian)(mian)(mian)質量(liang)(liang)的關鍵(jian)，尤其在高(gao)速(su)磨(mo)削(xue)與精密磨(mo)削(xue)中，振(zhen)(zhen)動(dong)(dong)(dong)(dong)(dong)易導致工(gong)件表面(mian)(mian)(mian)出(chu)現振(zhen)(zhen)紋(wen)（頻率 50-500Hz）、尺(chi)寸(cun)精度下降(jiang)，甚至(zhi)(zhi)縮短砂(sha)輪(lun)壽命。磨(mo)床振(zhen)(zhen)動(dong)(dong)(dong)(dong)(dong)主要(yao)來源于三個方面(mian)(mian)(mian)：砂(sha)輪(lun)高(gao)速(su)旋(xuan)轉(zhuan)振(zhen)(zhen)動(dong)(dong)(dong)(dong)(dong)、工(gong)作臺往復運動(dong)(dong)(dong)(dong)(dong)振(zhen)(zhen)動(dong)(dong)(dong)(dong)(dong)與磨(mo)削(xue)力波動(dong)(dong)(dong)(dong)(dong)振(zhen)(zhen)動(dong)(dong)(dong)(dong)(dong)，對應(ying)的抑制(zhi)(zhi)(zhi)技(ji)術(shu)各有(you)側(ce)重。砂(sha)輪(lun)振(zhen)(zhen)動(dong)(dong)(dong)(dong)(dong)抑制(zhi)(zhi)(zhi)方面(mian)(mian)(mian)，采用 “動(dong)(dong)(dong)(dong)(dong)平(ping)衡(heng)(heng)控(kong)制(zhi)(zhi)(zhi)” 技(ji)術(shu)：在砂(sha)輪(lun)法蘭上安(an)裝平(ping)衡(heng)(heng)塊(kuai)或自(zi)動(dong)(dong)(dong)(dong)(dong)平(ping)衡(heng)(heng)裝置(zhi)，實時(shi)監測砂(sha)輪(lun)的不平(ping)衡(heng)(heng)量(liang)(liang)（通過振(zhen)(zhen)動(dong)(dong)(dong)(dong)(dong)傳(chuan)感器采集），當(dang)不平(ping)衡(heng)(heng)量(liang)(liang)超過預設值（如 5g?mm）時(shi)，自(zi)動(dong)(dong)(dong)(dong)(dong)調整平(ping)衡(heng)(heng)塊(kuai)位置(zhi)，將不平(ping)衡(heng)(heng)量(liang)(liang)控(kong)制(zhi)(zhi)(zhi)在 2g?mm 以內，避免砂(sha)輪(lun)高(gao)速(su)旋(xuan)轉(zhuan)時(shi)產生離(li)心力振(zhen)(zhen)動(dong)(dong)(dong)(dong)(dong)（振(zhen)(zhen)幅從 0.01mm 降(jiang)至(zhi)(zhi) 0.002mm）。南京(jing)銑床運動(dong)(dong)(dong)(dong)(dong)控(kong)制(zhi)(zhi)(zhi)廠家。揚(yang)州磨(mo)床運動(dong)(dong)(dong)(dong)(dong)控(kong)制(zhi)(zhi)(zhi)維修

無心(xin)(xin)磨床(chuang)的(de)(de)(de)運動(dong)(dong)控(kong)(kong)制(zhi)(zhi)特點聚焦(jiao)于批(pi)(pi)量(liang)軸(zhou)(zhou)(zhou)類零件(jian)的(de)(de)(de)高效磨削(xue)，其挑戰(zhan)是實現工件(jian)的(de)(de)(de)穩定支撐(cheng)與砂(sha)輪(lun)(lun)、導輪(lun)(lun)的(de)(de)(de)協(xie)同運動(dong)(dong)。無心(xin)(xin)磨床(chuang)通過(guo)砂(sha)輪(lun)(lun)（切削(xue)輪(lun)(lun)）、導輪(lun)(lun)（定位輪(lun)(lun)）與托板共同支撐(cheng)工件(jian)，無需裝夾，適合 φ5-50mm、長度 50-500mm 的(de)(de)(de)軸(zhou)(zhou)(zhou)類零件(jian)批(pi)(pi)量(liang)加工（如螺栓、銷軸(zhou)(zhou)(zhou)）。運動(dong)(dong)控(kong)(kong)制(zhi)(zhi)的(de)(de)(de)關鍵(jian)在于：導輪(lun)(lun)通過(guo)變(bian)頻(pin)電機(ji)驅(qu)動(dong)(dong)，以(yi)(yi)較低轉(zhuan)速(su)(su)(su)（50-200r/min）帶動(dong)(dong)工件(jian)旋(xuan)轉(zhuan)，同時(shi)(shi)通過(guo)傾(qing)斜(xie) 2-5° 的(de)(de)(de)安裝角度，推動(dong)(dong)工件(jian)沿軸(zhou)(zhou)(zhou)向(xiang)勻速(su)(su)(su)進給(gei)(gei)（進給(gei)(gei)速(su)(su)(su)度 0.1-1m/min）；砂(sha)輪(lun)(lun)則以(yi)(yi)高速(su)(su)(su)（3000-8000r/min）旋(xuan)轉(zhuan)完成切削(xue)。為保證(zheng)工件(jian)直徑(jing)精度，系統需實時(shi)(shi)調整導輪(lun)(lun)轉(zhuan)速(su)(su)(su)與砂(sha)輪(lun)(lun)進給(gei)(gei)量(liang) —— 例如加工 φ20mm 的(de)(de)(de) 45 鋼銷軸(zhou)(zhou)(zhou)時(shi)(shi)，導輪(lun)(lun)轉(zhuan)速(su)(su)(su) 100r/min、傾(qing)斜(xie) 3°，使工件(jian)軸(zhou)(zhou)(zhou)向(xiang)進給(gei)(gei)速(su)(su)(su)度 0.3m/min，砂(sha)輪(lun)(lun)每(mei)批(pi)(pi)次進給(gei)(gei) 0.01mm，經過(guo) 3 次磨削(xue)循環(huan)后，工件(jian)直徑(jing)公差控(kong)(kong)制(zhi)(zhi)在 ±0.002mm 以(yi)(yi)內。此外，無心(xin)(xin)磨床(chuang)還需通過(guo) “工件(jian)圓度監控(kong)(kong)” 技術：在出料端安裝激光測徑(jing)儀，實時(shi)(shi)測量(liang)工件(jian)直徑(jing)，若發現超差（如超過(guo) ±0.003mm），立即調整砂(sha)輪(lun)(lun)進給(gei)(gei)量(liang)或導輪(lun)(lun)轉(zhuan)速(su)(su)(su)，確保批(pi)(pi)量(liang)加工的(de)(de)(de)一致性，廢品率可控(kong)(kong)制(zhi)(zhi)在 0.1% 以(yi)(yi)下。宿遷(qian)鎂鋁合金運動(dong)(dong)控(kong)(kong)制(zhi)(zhi)廠家湖(hu)州鉆床(chuang)運動(dong)(dong)控(kong)(kong)制(zhi)(zhi)廠家。

平(ping)(ping)(ping)面磨床(chuang)的(de)(de)工(gong)作(zuo)(zuo)(zuo)臺運(yun)(yun)(yun)(yun)動(dong)(dong)(dong)(dong)控(kong)制直(zhi)接決定工(gong)件平(ping)(ping)(ping)面度(du)與平(ping)(ping)(ping)行(xing)度(du)精度(du)，其在于實現(xian)工(gong)作(zuo)(zuo)(zuo)臺的(de)(de)平(ping)(ping)(ping)穩往(wang)(wang)復運(yun)(yun)(yun)(yun)動(dong)(dong)(dong)(dong)與砂輪(lun)進給(gei)(gei)(gei)的(de)(de)匹配。平(ping)(ping)(ping)面磨床(chuang)加(jia)工(gong)平(ping)(ping)(ping)板(ban)(ban)類零件（如(ru)模具模板(ban)(ban)、機床(chuang)工(gong)作(zuo)(zuo)(zuo)臺）時，工(gong)作(zuo)(zuo)(zuo)臺需沿床(chuang)身導(dao)軌做(zuo)往(wang)(wang)復直(zhi)線運(yun)(yun)(yun)(yun)動(dong)(dong)(dong)(dong)（行(xing)程(cheng)(cheng) 500-2000mm），運(yun)(yun)(yun)(yun)動(dong)(dong)(dong)(dong)速度(du) 0.5-5m/min，同時砂輪(lun)沿垂直(zhi)方向(xiang)（Z 軸(zhou)）做(zuo)微量進給(gei)(gei)(gei)（每(mei)行(xing)程(cheng)(cheng)進給(gei)(gei)(gei) 0.001-0.01mm）。為保(bao)證運(yun)(yun)(yun)(yun)動(dong)(dong)(dong)(dong)平(ping)(ping)(ping)穩性，工(gong)作(zuo)(zuo)(zuo)臺驅動(dong)(dong)(dong)(dong)系統采用(yong) “伺服電機 + 滾珠(zhu)絲杠 + 矩形導(dao)軌” 組(zu)合：滾珠(zhu)絲杠導(dao)程(cheng)(cheng)誤差(cha)通(tong)過(guo)(guo)激光(guang)干涉儀(yi)校準(zhun)至≤0.003mm/m，導(dao)軌采用(yong)貼塑或滾動(dong)(dong)(dong)(dong)導(dao)軌副，摩擦系數≤0.005，避免運(yun)(yun)(yun)(yun)動(dong)(dong)(dong)(dong)過(guo)(guo)程(cheng)(cheng)中出現(xian) “爬行(xing)” 現(xian)象(xiang)（低速時速度(du)波動(dong)(dong)(dong)(dong)導(dao)致的(de)(de)表面劃痕）。系統還(huan)會通(tong)過(guo)(guo) “反向(xiang)間隙補償(chang)” 消除(chu)絲杠與螺母間的(de)(de)間隙（通(tong)常 0.002-0.005mm），當工(gong)作(zuo)(zuo)(zuo)臺從正向(xiang)運(yun)(yun)(yun)(yun)動(dong)(dong)(dong)(dong)切換為反向(xiang)運(yun)(yun)(yun)(yun)動(dong)(dong)(dong)(dong)時，自動(dong)(dong)(dong)(dong)補償(chang)間隙量，確(que)保(bao)砂輪(lun)切削(xue)位置無偏差(cha)。在加(jia)工(gong) 600mm×400mm×50mm 的(de)(de)灰鑄鐵(tie)平(ping)(ping)(ping)板(ban)(ban)時，工(gong)作(zuo)(zuo)(zuo)臺往(wang)(wang)復速度(du) 2m/min，Z 軸(zhou)每(mei)行(xing)程(cheng)(cheng)進給(gei)(gei)(gei) 0.003mm，經過(guo)(guo) 10 次往(wang)(wang)復磨削(xue)后，平(ping)(ping)(ping)板(ban)(ban)平(ping)(ping)(ping)面度(du)誤差(cha)≤0.005mm/m，平(ping)(ping)(ping)行(xing)度(du)誤差(cha)≤0.008mm，符合 GB/T 1184-2008 的(de)(de) 0 級精度(du)標(biao)準(zhun)。

數控磨(mo)床(chuang)的(de)(de)(de)(de)溫度(du)(du)誤(wu)差(cha)補(bu)(bu)償(chang)(chang)(chang)控制技術(shu)是(shi)提升(sheng)(sheng)(sheng)長期加(jia)工(gong)精(jing)度(du)(du)的(de)(de)(de)(de)關鍵(jian)，主(zhu)要針對磨(mo)床(chuang)因溫度(du)(du)變(bian)(bian)(bian)化導致的(de)(de)(de)(de)幾何誤(wu)差(cha)。磨(mo)床(chuang)在(zai)(zai)運行(xing)過程中(zhong)，主(zhu)軸(zhou)(zhou)(zhou)(zhou)(zhou)、進(jin)給(gei)軸(zhou)(zhou)(zhou)(zhou)(zhou)、床(chuang)身等部(bu)件會因電機發熱(re)、摩擦發熱(re)與環境溫度(du)(du)變(bian)(bian)(bian)化產生熱(re)變(bian)(bian)(bian)形：例(li)如主(zhu)軸(zhou)(zhou)(zhou)(zhou)(zhou)高(gao)速旋轉 1 小時后(hou)，溫度(du)(du)升(sheng)(sheng)(sheng)高(gao) 15-20℃，軸(zhou)(zhou)(zhou)(zhou)(zhou)長因熱(re)脹冷(leng)縮增加(jia) 0.01-0.02mm；床(chuang)身溫度(du)(du)變(bian)(bian)(bian)化 5℃，導軌平(ping)行(xing)度(du)(du)誤(wu)差(cha)可能增加(jia) 0.005mm/m。溫度(du)(du)誤(wu)差(cha)補(bu)(bu)償(chang)(chang)(chang)技術(shu)通過以(yi)下方(fang)式實(shi)現(xian)：在(zai)(zai)磨(mo)床(chuang)關鍵(jian)部(bu)位（主(zhu)軸(zhou)(zhou)(zhou)(zhou)(zhou)箱、床(chuang)身、進(jin)給(gei)軸(zhou)(zhou)(zhou)(zhou)(zhou)）安裝溫度(du)(du)傳感器（精(jing)度(du)(du) ±0.1℃），實(shi)時采集溫度(du)(du)數據；系統(tong)根(gen)據預設的(de)(de)(de)(de) “溫度(du)(du) - 誤(wu)差(cha)” 模型(xing)（通過激光(guang)干涉儀(yi)在(zai)(zai)不同溫度(du)(du)下測(ce)量(liang)(liang)建立），計算各軸(zhou)(zhou)(zhou)(zhou)(zhou)的(de)(de)(de)(de)熱(re)變(bian)(bian)(bian)形量(liang)(liang)，自動補(bu)(bu)償(chang)(chang)(chang)進(jin)給(gei)軸(zhou)(zhou)(zhou)(zhou)(zhou)位置。例(li)如主(zhu)軸(zhou)(zhou)(zhou)(zhou)(zhou)溫度(du)(du)升(sheng)(sheng)(sheng)高(gao) 18℃時，根(gen)據模型(xing)計算出 Z 軸(zhou)(zhou)(zhou)(zhou)(zhou)（砂輪進(jin)給(gei)軸(zhou)(zhou)(zhou)(zhou)(zhou)）熱(re)變(bian)(bian)(bian)形量(liang)(liang) 0.012mm，系統(tong)自動將 Z 軸(zhou)(zhou)(zhou)(zhou)(zhou)向上補(bu)(bu)償(chang)(chang)(chang) 0.012mm，確保工(gong)件磨(mo)削厚度(du)(du)不受主(zhu)軸(zhou)(zhou)(zhou)(zhou)(zhou)熱(re)變(bian)(bian)(bian)形影(ying)響。在(zai)(zai)實(shi)際(ji)應用(yong)中(zhong)，溫度(du)(du)誤(wu)差(cha)補(bu)(bu)償(chang)(chang)(chang)可使磨(mo)床(chuang)的(de)(de)(de)(de)長期加(jia)工(gong)精(jing)度(du)(du)穩定(ding)(ding)性(xing)提升(sheng)(sheng)(sheng) 50% 以(yi)上 —— 如某數控平(ping)面(mian)磨(mo)床(chuang)在(zai)(zai) 24 小時連續加(jia)工(gong)中(zhong)，未補(bu)(bu)償(chang)(chang)(chang)時工(gong)件平(ping)面(mian)度(du)(du)誤(wu)差(cha)從 0.003mm 增至(zhi) 0.008mm，啟用(yong)補(bu)(bu)償(chang)(chang)(chang)后(hou)誤(wu)差(cha)穩定(ding)(ding)在(zai)(zai) 0.003-0.004mm，滿足(zu)精(jing)密零件的(de)(de)(de)(de)批量(liang)(liang)加(jia)工(gong)要求。嘉興車床(chuang)運動控制廠家。

在(zai)電(dian)(dian)芯(xin)(xin)堆疊(die)(die)(die)工序中，運(yun)(yun)動(dong)(dong)(dong)控(kong)(kong)(kong)制(zhi)器需控(kong)(kong)(kong)制(zhi)堆疊(die)(die)(die)機(ji)械臂完成電(dian)(dian)芯(xin)(xin)的(de)抓取(qu)(qu)、定(ding)位與(yu)(yu)堆疊(die)(die)(die)，由于(yu)電(dian)(dian)芯(xin)(xin)質(zhi)地較(jiao)軟，且堆疊(die)(die)(die)層數較(jiao)多（通(tong)(tong)常可(ke)達數十(shi)層），運(yun)(yun)動(dong)(dong)(dong)控(kong)(kong)(kong)制(zhi)需實現(xian)平(ping)穩的(de)抓取(qu)(qu)與(yu)(yu)放置(zhi)動(dong)(dong)(dong)作，避(bi)免(mian)電(dian)(dian)芯(xin)(xin)碰撞或擠壓損壞。為此(ci)，運(yun)(yun)動(dong)(dong)(dong)控(kong)(kong)(kong)制(zhi)器采(cai)用(yong)柔性(xing)抓取(qu)(qu)控(kong)(kong)(kong)制(zhi)算法，通(tong)(tong)過(guo)(guo)控(kong)(kong)(kong)制(zhi)機(ji)械爪的(de)開合力度與(yu)(yu)運(yun)(yun)動(dong)(dong)(dong)速度，確保(bao)(bao)(bao)電(dian)(dian)芯(xin)(xin)抓取(qu)(qu)穩定(ding)且無損傷；同時(shi)，通(tong)(tong)過(guo)(guo)多軸(zhou)同步控(kong)(kong)(kong)制(zhi)，使堆疊(die)(die)(die)平(ping)臺與(yu)(yu)機(ji)械臂的(de)運(yun)(yun)動(dong)(dong)(dong)配合，實現(xian)電(dian)(dian)芯(xin)(xin)的(de)整齊堆疊(die)(die)(die)。此(ci)外，新(xin)能(neng)源汽車電(dian)(dian)池(chi)組裝對設(she)備(bei)的(de)可(ke)靠性(xing)要求(qiu)極高，運(yun)(yun)動(dong)(dong)(dong)控(kong)(kong)(kong)制(zhi)系統(tong)(tong)需具(ju)備(bei)故障(zhang)自診斷與(yu)(yu)應急保(bao)(bao)(bao)護功能(neng)，當出現(xian)電(dian)(dian)機(ji)過(guo)(guo)載、位置(zhi)超差等(deng)故障(zhang)時(shi)，系統(tong)(tong)可(ke)立即停止運(yun)(yun)動(dong)(dong)(dong)，并(bing)發(fa)出報(bao)警信號，防止設(she)備(bei)損壞或電(dian)(dian)池(chi)報(bao)廢；同時(shi)，通(tong)(tong)過(guo)(guo)冗(rong)余設(she)計(ji)，如關(guan)鍵軸(zhou)配備(bei)雙編(bian)碼器，確保(bao)(bao)(bao)在(zai)單一反饋(kui)裝置(zhi)故障(zhang)時(shi)，系統(tong)(tong)仍能(neng)維持基本(ben)的(de)控(kong)(kong)(kong)制(zhi)功能(neng)，提升設(she)備(bei)的(de)運(yun)(yun)行**性(xing)。安徽義齒(chi)運(yun)(yun)動(dong)(dong)(dong)控(kong)(kong)(kong)制(zhi)廠家。宿(su)遷鎂鋁合金(jin)運(yun)(yun)動(dong)(dong)(dong)控(kong)(kong)(kong)制(zhi)廠家

無錫車床(chuang)運動(dong)控制廠家。揚州磨床(chuang)運動(dong)控制維修

內(nei)圓(yuan)磨床(chuang)(chuang)的(de)進(jin)給(gei)軸(zhou)(zhou)(zhou)(zhou)控(kong)制(zhi)技(ji)術針對工(gong)件內(nei)孔(kong)(kong)(kong)(kong)(kong)磨削的(de)特殊(shu)性，需(xu)(xu)解決(jue)小直(zhi)(zhi)徑(jing)、深(shen)(shen)孔(kong)(kong)(kong)(kong)(kong)加工(gong)的(de)精度(du)(du)與剛(gang)性問(wen)題。內(nei)圓(yuan)磨床(chuang)(chuang)加工(gong)軸(zhou)(zhou)(zhou)(zhou)承內(nei)孔(kong)(kong)(kong)(kong)(kong)、液(ye)壓(ya)閥孔(kong)(kong)(kong)(kong)(kong)等零件（孔(kong)(kong)(kong)(kong)(kong)徑(jing) φ10-200mm，孔(kong)(kong)(kong)(kong)(kong)深(shen)(shen) 50-500mm）時，砂(sha)(sha)(sha)輪(lun)軸(zhou)(zhou)(zhou)(zhou)需(xu)(xu)伸入工(gong)件孔(kong)(kong)(kong)(kong)(kong)內(nei)進(jin)行磨削，因此砂(sha)(sha)(sha)輪(lun)軸(zhou)(zhou)(zhou)(zhou)直(zhi)(zhi)徑(jing)較(jiao)小（通常為孔(kong)(kong)(kong)(kong)(kong)徑(jing)的(de) 1/3-1/2），剛(gang)性較(jiao)差(cha)(cha)，易(yi)產(chan)生振(zhen)動(dong)。為提升剛(gang)性，砂(sha)(sha)(sha)輪(lun)軸(zhou)(zhou)(zhou)(zhou)采用 “高頻電主軸(zhou)(zhou)(zhou)(zhou)” 結構（轉(zhuan)速 10000-30000r/min），軸(zhou)(zhou)(zhou)(zhou)徑(jing)與孔(kong)(kong)(kong)(kong)(kong)深(shen)(shen)比控(kong)制(zhi)在 1:5 以內(nei)（如孔(kong)(kong)(kong)(kong)(kong)徑(jing) φ50mm 時，砂(sha)(sha)(sha)輪(lun)軸(zhou)(zhou)(zhou)(zhou)直(zhi)(zhi)徑(jing) φ16mm，孔(kong)(kong)(kong)(kong)(kong)深(shen)(shen)≤80mm），同時配備(bei)動(dong)靜壓(ya)軸(zhou)(zhou)(zhou)(zhou)承，徑(jing)向剛(gang)度(du)(du)≥50N/μm。進(jin)給(gei)軸(zhou)(zhou)(zhou)(zhou)控(kong)制(zhi)方面，X 軸(zhou)(zhou)(zhou)(zhou)（徑(jing)向進(jin)給(gei)）負(fu)責控(kong)制(zhi)砂(sha)(sha)(sha)輪(lun)切入深(shen)(shen)度(du)(du)，定位精度(du)(du)需(xu)(xu)達到 ±0.0005mm，以保(bao)證(zheng)內(nei)孔(kong)(kong)(kong)(kong)(kong)直(zhi)(zhi)徑(jing)公(gong)(gong)差(cha)(cha)（如 H7 級公(gong)(gong)差(cha)(cha)，φ50H7 的(de)公(gong)(gong)差(cha)(cha)范(fan)圍為 0-0.025mm）；Z 軸(zhou)(zhou)(zhou)(zhou)（軸(zhou)(zhou)(zhou)(zhou)向進(jin)給(gei)）控(kong)制(zhi)砂(sha)(sha)(sha)輪(lun)沿孔(kong)(kong)(kong)(kong)(kong)深(shen)(shen)方向移(yi)動(dong)，需(xu)(xu)保(bao)證(zheng)運(yun)動(dong)平穩性，避免因振(zhen)動(dong)導致內(nei)孔(kong)(kong)(kong)(kong)(kong)圓(yuan)柱度(du)(du)超差(cha)(cha)。在加工(gong) φ50mm、孔(kong)(kong)(kong)(kong)(kong)深(shen)(shen) 80mm 的(de) 40Cr 鋼液(ye)壓(ya)閥孔(kong)(kong)(kong)(kong)(kong)時，砂(sha)(sha)(sha)輪(lun)軸(zhou)(zhou)(zhou)(zhou)轉(zhuan)速 20000r/min，X 軸(zhou)(zhou)(zhou)(zhou)每次進(jin)給(gei) 0.002mm，Z 軸(zhou)(zhou)(zhou)(zhou)移(yi)動(dong)速度(du)(du) 1m/min，經過 5 次磨削循(xun)環后，內(nei)孔(kong)(kong)(kong)(kong)(kong)圓(yuan)度(du)(du)誤差(cha)(cha)≤0.0008mm，圓(yuan)柱度(du)(du)誤差(cha)(cha)≤0.0015mm，表面粗(cu)糙度(du)(du) Ra0.4μm，滿足液(ye)壓(ya)系統的(de)密封要求。揚州磨床(chuang)(chuang)運(yun)動(dong)控(kong)制(zhi)維(wei)修