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　　一(yi)般軟(ruan)密封球(qiu)閥(fa)閥(fa)芯材(cai)料(liao)為(wei)不(bu)銹鋼，普通加(jia)工(gong)(gong)方法為(wei)圓車(che)或數控(kong)車(che)床車(che)削(xue)，一(yi)般尺寸(cun)要求不(bu)高(gao)，車(che)床就可以達到尺寸(cun)要求，但是閥(fa)芯對光(guang)潔(jie)度要求較高(gao)，一(yi)般采用車(che)削(xue)后(hou)磨削(xue)加(jia)工(gong)(gong)，磨削(xue)后(hou)拋(pao)光(guang)，工(gong)(gong)序多，質量難以控(kong)制，例如(ru)車(che)削(xue)后(hou)，二(er)(er)次搬運(yun)，二(er)(er)次裝夾后(hou)，磨削(xue)，然后(hou)再次搬運(yun)、裝夾，拋(pao)光(guang)，以直徑80毫米球(qiu)閥(fa)閥(fa)芯為(wei)例，車(che)削(xue)耗時(shi)2到3分(fen)鐘(zhong)(zhong)，磨削(xue)耗時(shi)2到3分(fen)鐘(zhong)(zhong)，拋(pao)光(guang)耗時(shi)40分(fen)鐘(zhong)(zhong)，且拋(pao)光(guang)易造(zao)成工(gong)(gong)件(jian)(jian)圓度破壞，并且工(gong)(gong)件(jian)(jian)在不(bu)同(tong)工(gong)(gong)序間(jian)需要多次裝拆搬運(yun)，耗時(shi)費(fei)力，質量難以保證，同(tong)時(shi)拋(pao)光(guang)造(zao)成工(gong)(gong)作環境惡劣。

　　電致(zhi)伸(shen)(shen)縮精整設備加工(gong)(gong)(gong)球閥(fa)閥(fa)芯(xin)，在普通圓車或者數控車床上，一(yi)次(ci)裝(zhuang)夾(jia)工(gong)(gong)(gong)件(jian)(jian)，就可以(yi)實現從(cong)毛(mao)(mao)坯件(jian)(jian)到成(cheng)品工(gong)(gong)(gong)件(jian)(jian)的(de)加工(gong)(gong)(gong)，首先用車刀將工(gong)(gong)(gong)件(jian)(jian)車到尺寸，以(yi)直徑(jing)80毫米(mi)球閥(fa)閥(fa)芯(xin)為(wei)例，毛(mao)(mao)坯件(jian)(jian)裝(zhuang)夾(jia)好后(hou)(hou)，粗車與精車可以(yi)一(yi)次(ci)完成(cheng)，車削后(hou)(hou)粗糙度(du)(du)值為(wei)Ra7到8微(wei)(wei)米(mi)左右(you)，耗(hao)時2分(fen)鐘(zhong)，然后(hou)(hou)用電致(zhi)伸(shen)(shen)縮精整設備加工(gong)(gong)(gong)一(yi)遍，耗(hao)時2分(fen)鐘(zhong)，工(gong)(gong)(gong)件(jian)(jian)尺寸符合要求，光(guang)潔度(du)(du)達到Ra0.1微(wei)(wei)米(mi)以(yi)下。效(xiao)率(lv)是傳統工(gong)(gong)(gong)藝的(de)幾(ji)十(shi)倍。而且(qie)加工(gong)(gong)(gong)環境好，耗(hao)材幾(ji)乎為(wei)零，成(cheng)本降(jiang)低，質量(liang)明顯提高。