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　　一些大口徑異型(xing)液(ye)壓缸(gang)(gang)以及活塞桿工(gong)件(jian)，如果對粗糙(cao)度值要(yao)求(qiu)達(da)(da)到Ra0.2微米(mi)，普(pu)通(tong)加工(gong)手段就比較吃力(li)，例如，大型(xing)壓機上油缸(gang)(gang)，直徑600毫米(mi)以上，深度500毫米(mi)左右，立(li)車車削后(hou)可以達(da)(da)到尺寸要(yao)求(qiu)，粗糙(cao)度值達(da)(da)到Ra1.6到3.2微米(mi)之間，普(pu)通(tong)工(gong)藝為車削后(hou)砂帶(dai)拋光，需要(yao)拋磨(mo)5到6個小時(shi)，仍然(ran)難以達(da)(da)到要(yao)求(qiu)，粉塵(chen)致使加工(gong)環境惡(e)劣(lie)，且(qie)存在(zai)安(an)全隱患。加工(gong)活塞類工(gong)件(jian)面臨(lin)同樣(yang)的問題，并(bing)且(qie)密(mi)(mi)封部位的溝(gou)槽采(cai)用(yong)普(pu)通(tong)工(gong)藝手段無法加工(gong)，由于(yu)溝(gou)槽部位車削后(hou)比較粗糙(cao)，對密(mi)(mi)封圈磨(mo)損嚴重，在(zai)后(hou)期工(gong)件(jian)長(chang)時(shi)間使用(yong)中容易造成(cheng)密(mi)(mi)封不嚴，造成(cheng)泄(xie)漏。

　　采用電致伸(shen)縮精(jing)整(zheng)(zheng)設備加(jia)(jia)工(gong)(gong)(gong)(gong)以(yi)(yi)上工(gong)(gong)(gong)(gong)件(jian)，使加(jia)(jia)工(gong)(gong)(gong)(gong)變(bian)得更(geng)為簡單(dan)，將工(gong)(gong)(gong)(gong)件(jian)車削(xue)尺寸加(jia)(jia)工(gong)(gong)(gong)(gong)到(dao)位后(hou)，再用電致伸(shen)縮精(jing)整(zheng)(zheng)設備加(jia)(jia)工(gong)(gong)(gong)(gong)一遍，可以(yi)(yi)達到(dao)Ra0.1微米(mi)(mi)，符合質(zhi)量要求，加(jia)(jia)工(gong)(gong)(gong)(gong)時間更(geng)短，以(yi)(yi)直徑600毫米(mi)(mi)，深度(du)500毫米(mi)(mi)左右工(gong)(gong)(gong)(gong)件(jian)為例，電致伸(shen)縮精(jing)整(zheng)(zheng)設備加(jia)(jia)工(gong)(gong)(gong)(gong)僅需要30分鐘左右，活塞(sai)桿類工(gong)(gong)(gong)(gong)件(jian)的溝槽等也可以(yi)(yi)輕松加(jia)(jia)工(gong)(gong)(gong)(gong)到(dao)Ra0.1微米(mi)(mi)以(yi)(yi)下，提(ti)高了產(chan)品質(zhi)量，減少(shao)了密封圈因溝槽光(guang)潔度(du)差引(yin)起的快速磨損，提(ti)高了使用壽命(ming)。