對(dui)于(yu)中(zhong)走絲(si)切割(ge)(ge)工(gong)(gong)(gong)件(jian)(jian)余留部(bu)位(wei)切割(ge)(ge)的多次加(jia)(jia)工(gong)(gong)(gong)，首(shou)先必須解決被加(jia)(jia)工(gong)(gong)(gong)工(gong)(gong)(gong)件(jian)(jian)的導電(dian)(dian)問題，因(yin)為在高(gao)精度線(xian)切割(ge)(ge)加(jia)(jia)工(gong)(gong)(gong)中(zhong)，線(xian)電(dian)(dian)極的行走路線(xian)可能需要(yao)沿加(jia)(jia)工(gong)(gong)(gong)軌跡往復行走多次，才能保證(zheng)被加(jia)(jia)工(gong)(gong)(gong)工(gong)(gong)(gong)件(jian)(jian)具有(you)較高(gao)表面粗(cu)糙(cao)度和表面精度，這時線(xian)切割(ge)(ge)加(jia)(jia)工(gong)(gong)(gong)是靠工(gong)(gong)(gong)件(jian)(jian)余留部(bu)位(wei)起到導電(dian)(dian)作用以保障電(dian)(dian)加(jia)(jia)工(gong)(gong)(gong)正(zheng)常進(jin)行。

　　但在進行(xing)工(gong)(gong)件余留(liu)部(bu)(bu)位(wei)的切(qie)割(ge)加工(gong)(gong)時，若次切(qie)割(ge)即(ji)切(qie)下(xia)工(gong)(gong)件余留(liu)部(bu)(bu)位(wei)，將會(hui)導致(zhi)被切(qie)割(ge)部(bu)(bu)分與母(mu)體分離，以致(zhi)導電(dian)回(hui)路中斷，無法進行(xing)繼續加工(gong)(gong)，所以從(cong)線(xian)切(qie)割(ge)加工(gong)(gong)的條(tiao)件性(xing)和延續性(xing)考慮(lv)，必(bi)須使工(gong)(gong)件余留(liu)部(bu)(bu)位(wei)即(ji)便(bian)在多次切(qie)割(ge)的情況(kuang)下(xia)也能保(bao)持與母(mu)體之(zhi)間正常(chang)導電(dian)的要求。

　　中走絲為了(le)實現上述目的，操(cao)作工人力圖營造(zao)人為環境和(he)(he)條(tiao)件來滿足導電(dian)要求，即(ji)當(dang)工作人員在操(cao)作電(dian)火花線切(qie)(qie)割機遇到切(qie)(qie)割工件余留部(bu)位時(shi)，可采用在被(bei)切(qie)(qie)割部(bu)分(fen)和(he)(he)母體之間粘銅片(pian)和(he)(he)在切(qie)(qie)割間隙中塞銅片(pian)的處理方法來造(zao)成(cheng)人為的定位條(tiao)件和(he)(he)導電(dian)條(tiao)件，使是火花加工得以繼續進(jin)行，其具(ju)體做法與(yu)技(ji)巧(qiao)如下(xia)：

　　(1)在被(bei)切(qie)割部分與母(mu)體材料(liao)之間填(tian)(tian)(tian)充(chong)(chong)導(dao)(dao)電(dian)(dian)(dian)(dian)銅(tong)(tong)(tong)片(pian)(pian)(pian)(pian)。把(ba)經折疊、剪齊、錘(chui)平和修銼的(de)(de)(de)薄(bo)銅(tong)(tong)(tong)片(pian)(pian)(pian)(pian)填(tian)(tian)(tian)充(chong)(chong)在線電(dian)(dian)(dian)(dian)極加工形成(cheng)(cheng)的(de)(de)(de)縫隙里，并(bing)使(shi)銅(tong)(tong)(tong)片(pian)(pian)(pian)(pian)和縫隙壁緊(jin)密貼(tie)合。填(tian)(tian)(tian)充(chong)(chong)此(ci)銅(tong)(tong)(tong)片(pian)(pian)(pian)(pian)的(de)(de)(de)目(mu)的(de)(de)(de)是(shi)(shi)(shi)為了(le)導(dao)(dao)電(dian)(dian)(dian)(dian)，因為前面粘貼(tie)連接(jie)銅(tong)(tong)(tong)片(pian)(pian)(pian)(pian)時用(yong)(yong)了(le)502膠水，而(er)502膠水是(shi)(shi)(shi)不(bu)(bu)導(dao)(dao)電(dian)(dian)(dian)(dian)的(de)(de)(de)。為了(le)實現(xian)導(dao)(dao)電(dian)(dian)(dian)(dian)要求，故采用(yong)(yong)填(tian)(tian)(tian)充(chong)(chong)導(dao)(dao)電(dian)(dian)(dian)(dian)銅(tong)(tong)(tong)片(pian)(pian)(pian)(pian)的(de)(de)(de)方(fang)法，填(tian)(tian)(tian)充(chong)(chong)導(dao)(dao)電(dian)(dian)(dian)(dian)銅(tong)(tong)(tong)片(pian)(pian)(pian)(pian)時同(tong)(tong)樣(yang)應(ying)(ying)注意銅(tong)(tong)(tong)片(pian)(pian)(pian)(pian)的(de)(de)(de)對稱(cheng)布置以(yi)及銅(tong)(tong)(tong)片(pian)(pian)(pian)(pian)應(ying)(ying)同(tong)(tong)時加緊(jin)，并(bing)且不(bu)(bu)能塞得過(guo)緊(jin)以(yi)免劃傷工件(jian)的(de)(de)(de)表面。不(bu)(bu)管是(shi)(shi)(shi)粘貼(tie)連接(jie)銅(tong)(tong)(tong)片(pian)(pian)(pian)(pian)還是(shi)(shi)(shi)填(tian)(tian)(tian)充(chong)(chong)導(dao)(dao)電(dian)(dian)(dian)(dian)銅(tong)(tong)(tong)縫隙的(de)(de)(de)形狀。都(dou)應(ying)(ying)該把(ba)小銅(tong)(tong)(tong)片(pian)(pian)(pian)(pian)制成(cheng)(cheng)圓弧形，而(er)且還應(ying)(ying)該用(yong)(yong)金相砂布打磨(mo)被(bei)錘(chui)過(guo)的(de)(de)(de)銅(tong)(tong)(tong)片(pian)(pian)(pian)(pian)表面，以(yi)保證銅(tong)(tong)(tong)片(pian)(pian)(pian)(pian)表面光滑以(yi)避(bi)免劃傷工件(jian)已(yi)加工過(guo)的(de)(de)(de)表面。

　　(2)中(zhong)走絲切割(ge)在被切割(ge)部(bu)分(fen)與母體材料之(zhi)間(jian)粘貼連接銅片(pian)。

　　中走絲其(qi)目的(de)(de)是使(shi)工(gong)(gong)(gong)件(jian)(jian)余留(liu)部(bu)(bu)分(fen)在(zai)切(qie)(qie)割(ge)時(shi)(shi)與母體材(cai)料(liao)相連固(gu)定，保(bao)(bao)證線切(qie)(qie)割(ge)有(you)良好的(de)(de)定位(wei)(wei)(wei)條(tiao)件(jian)(jian)，從而保(bao)(bao)障工(gong)(gong)(gong)件(jian)(jian)有(you)優異的(de)(de)加(jia)(jia)工(gong)(gong)(gong)質量，這可(ke)(ke)依照以(yi)(yi)下(xia)步(bu)驟(zou)進行： ①首先根(gen)據加(jia)(jia)工(gong)(gong)(gong)工(gong)(gong)(gong)件(jian)(jian)的(de)(de)大小把薄銅(tong)片(pian)(厚度根(gen)據線電極情況(kuang)和(he)加(jia)(jia)工(gong)(gong)(gong)部(bu)(bu)位(wei)(wei)(wei)形狀而定)剪成長(chang)條(tiao)形，然后折疊，井保(bao)(bao)證折疊部(bu)(bu)分(fen)一長(chang)一短。②然后把銅(tong)片(pian)折疊的(de)(de)彎曲部(bu)(bu)分(fen)用(yong)小手錘錘平(ping)，并用(yong)什錦銼(cuo)修理(li)成楔形; ③再把經以(yi)(yi)上處理(li)的(de)(de)銅(tong)片(pian)塞到線電極加(jia)(jia)工(gong)(gong)(gong)所(suo)形成的(de)(de)縫隙里，同時(shi)(shi)在(zai)工(gong)(gong)(gong)件(jian)(jian)該(gai)部(bu)(bu)分(fen)的(de)(de)表面(mian)滴(di)上502膠(jiao)水(即環(huan)氧(yang)樹脂瞬時(shi)(shi)快(kuai)干膠(jiao))。由于(yu)切(qie)(qie)割(ge)時(shi)(shi)，電火花線切(qie)(qie)割(ge)機沖水使(shi)工(gong)(gong)(gong)件(jian)(jian)所(suo)受壓力較大，若單純用(yong)銅(tong)片(pian)塞緊(jin)來保(bao)(bao)證導(dao)電和(he)固(gu)定，容易產生以(yi)(yi)下(xia)問題：(a)銅(tong)片(pian)塞得太(tai)松，擔心(xin)固(gu)定不(bu)可(ke)(ke)靠、導(dao)電不(bu)穩定;(b)銅(tong)片(pian)塞得太(tai)緊(jin)，又擔心(xin)損(sun)傷工(gong)(gong)(gong)件(jian)(jian)表面(mian)、破壞(huai)形位(wei)(wei)(wei)公差，所(suo)以(yi)(yi)采用(yong)502膠(jiao)水來保(bao)(bao)證被(bei)切(qie)(qie)割(ge)部(bu)(bu)分(fen)與母體材(cai)料(liao)固(gu)定; ④在(zai)將(jiang)銅(tong)片(pian)塞進加(jia)(jia)工(gong)(gong)(gong)部(bu)(bu)位(wei)(wei)(wei)時(shi)(shi)，應注意是：用(yong)502膠(jiao)水粘(zhan)貼(tie)連接(jie)銅(tong)片(pian)時(shi)(shi)應遠離(li)工(gong)(gong)(gong)件(jian)(jian)余留(liu)部(bu)(bu)件(jian)(jian)處，以(yi)(yi)免502膠(jiao)水滲到，造成絕緣。此外粘(zhan)貼(tie)連接(jie)銅(tong)片(pian)的(de)(de)位(wei)(wei)(wei)置應考(kao)慮對稱分(fen)布(bu)，且(qie)應保(bao)(bao)證同時(shi)(shi)塞緊(jin)，避免工(gong)(gong)(gong)件(jian)(jian)發生偏移，以(yi)(yi)致影(ying)響工(gong)(gong)(gong)件(jian)(jian)加(jia)(jia)工(gong)(gong)(gong)質量。保(bao)(bao)證被(bei)中走絲切(qie)(qie)割(ge)工(gong)(gong)(gong)件(jian)(jian)余留(liu)部(bu)(bu)位(wei)(wei)(wei)形狀的(de)(de)正確性和(he)精(jing)度的(de)(de)可(ke)(ke)靠性。