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中走丝处理方法

中走丝处理方法

发布日期:2016-04-21 00:00 来源:http://xingyhhxa.cn 点击:

对于线(xian)(xian)(xian)切割工(gong)(gong)(gong)(gong)(gong)(gong)(gong)件(jian)(jian)余(yu)(yu)留(liu)(liu)部(bu)位(wei)切割的(de)(de)(de)多次加(jia)(jia)工(gong)(gong)(gong)(gong)(gong)(gong)(gong),首先必须(xu)解决被(bei)加(jia)(jia)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)件(jian)(jian)的(de)(de)(de)导(dao)电(dian)问题,因(yin)为在(zai)(zai)高精度线(xian)(xian)(xian)切割加(jia)(jia)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)中(zhong),线(xian)(xian)(xian)电(dian)极的(de)(de)(de)行(xing)(xing)(xing)走路线(xian)(xian)(xian)可能(neng)需要沿加(jia)(jia)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)轨(gui)迹往复行(xing)(xing)(xing)走多次,才能(neng)保证被(bei)加(jia)(jia)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)件(jian)(jian)具有较(jiao)高表面粗糙度和(he)表面精度,这时线(xian)(xian)(xian)切割加(jia)(jia)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)是靠工(gong)(gong)(gong)(gong)(gong)(gong)(gong)件(jian)(jian)余(yu)(yu)留(liu)(liu)部(bu)位(wei)起到(dao)导(dao)电(dian)作用(yong)以(yi)保障电(dian)加(jia)(jia)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)正常进行(xing)(xing)(xing)。但在(zai)(zai)进行(xing)(xing)(xing)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)件(jian)(jian)余(yu)(yu)留(liu)(liu)部(bu)位(wei)的(de)(de)(de)切割加(jia)(jia)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)时,若第一(yi)次切割即切下工(gong)(gong)(gong)(gong)(gong)(gong)(gong)件(jian)(jian)余(yu)(yu)留(liu)(liu)部(bu)位(wei),将会导(dao)致被(bei)切割部(bu)分(fen)与母体分(fen)离,以(yi)致导(dao)电(dian)回路中(zhong)断,无法(fa)进行(xing)(xing)(xing)继续加(jia)(jia)工(gong)(gong)(gong)(gong)(gong)(gong)(gong),所以(yi)从线(xian)(xian)(xian)切割加(jia)(jia)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)的(de)(de)(de)条件(jian)(jian)性(xing)和(he)延续性(xing)考虑(lv),必须(xu)使(shi)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)件(jian)(jian)余(yu)(yu)留(liu)(liu)部(bu)位(wei)即便在(zai)(zai)多次切割的(de)(de)(de)情况下也能(neng)保持与母体之间正常导(dao)电(dian)的(de)(de)(de)要求。

为了实现上述目的,操(cao)作(zuo)工(gong)人力图(tu)营(ying)造(zao)人为环境和(he)条(tiao)(tiao)件(jian)来满(man)足导电要求,即当工(gong)作(zuo)人员在(zai)操(cao)作(zuo)电火(huo)花线切(qie)(qie)割机遇到(dao)切(qie)(qie)割工(gong)件(jian)余留部(bu)位(wei)时(shi),可采用在(zai)被切(qie)(qie)割部(bu)分和(he)母体(ti)之间粘铜(tong)片(pian)和(he)在(zai)切(qie)(qie)割间隙中塞铜(tong)片(pian)的处理方法(fa)来造(zao)成人为的定位(wei)条(tiao)(tiao)件(jian)和(he)导电条(tiao)(tiao)件(jian),使是(shi)火(huo)花加(jia)工(gong)得以继续(xu)进行,其具体(ti)做法(fa)与(yu)技巧如下(xia):

(1)在被切(qie)割部分(fen)与母体材料之(zhi)间粘贴连接铜片(pian)。其目的是使工件余留部分(fen)在切(qie)割时(shi)与母体材料相连固定,保证线(xian)切(qie)割有良(liang)好的定位(wei)条(tiao)件,从而保障工件有优异(yi)的加工质(zhi)量,这可依照以下(xia)步骤进行:

①首先根(gen)据加(jia)工(gong)工(gong)件的大小(xiao)把薄铜片(pian)(厚度根(gen)据线电极情况和加(jia)工(gong)部(bu)位形状而(er)定)剪成长(zhang)条(tiao)形,然后折(zhe)叠,井保证折(zhe)叠部(bu)分(fen)一(yi)长(zhang)一(yi)短。

②然后把铜(tong)片折叠的弯曲部分用小手(shou)锤锤平,并(bing)用什锦锉(cuo)修理成楔形(xing);

③再把经以上(shang)处理的铜(tong)片塞到线电极加工(gong)所形成的缝隙里,同时在(zai)工(gong)件该部分的表面滴上(shang)502胶水(即环氧树脂瞬时快干胶)。

由(you)于切割(ge)时,电火花线(xian)切割(ge)机冲水(shui)使工(gong)件所(suo)受压力较大,若单(dan)纯用(yong)(yong)铜片(pian)塞紧来保(bao)(bao)证导电和固(gu)定(ding),容(rong)易产生以(yi)(yi)下(xia)问题(ti):(a)铜片(pian)塞得太松,担(dan)心固(gu)定(ding)不(bu)(bu)可靠、导电不(bu)(bu)稳(wen)定(ding);(b)铜片(pian)塞得太紧,又担(dan)心损伤(shang)工(gong)件表面、破坏(huai)形位(wei)公差,所(suo)以(yi)(yi)采用(yong)(yong)502胶(jiao)水(shui)来保(bao)(bao)证被切割(ge)部分与母体材料固(gu)定(ding);

④在(zai)将铜(tong)片塞进加工部位(wei)(wei)时,应注意是:用502胶水粘(zhan)贴(tie)连接铜(tong)片时应远离工件余留(liu)部件处,以免502胶水渗到,造成绝缘。此外粘(zhan)贴(tie)连接铜(tong)片的位(wei)(wei)置应考虑(lv)对称分布,且(qie)应保证同(tong)时塞紧(jin),避免工件发生偏移,以致(zhi)影响工件加工质量。保证被切(qie)割工件余留(liu)部位(wei)(wei)形状的正确性和精度的可(ke)靠性。

(2)在被(bei)切割部(bu)分与(yu)母体材(cai)料之(zhi)间填(tian)充(chong)导(dao)电(dian)(dian)铜(tong)(tong)片(pian)(pian)(pian)。把(ba)经(jing)折(zhe)叠、剪齐、锤平和修锉的(de)(de)(de)薄铜(tong)(tong)片(pian)(pian)(pian)填(tian)充(chong)在线(xian)电(dian)(dian)极(ji)加工(gong)(gong)形(xing)(xing)成的(de)(de)(de)缝隙里,并(bing)使铜(tong)(tong)片(pian)(pian)(pian)和缝隙壁紧密贴(tie)合。填(tian)充(chong)此铜(tong)(tong)片(pian)(pian)(pian)的(de)(de)(de)目的(de)(de)(de)是(shi)为了(le)导(dao)电(dian)(dian),因为前(qian)面(mian)粘(zhan)贴(tie)连接(jie)铜(tong)(tong)片(pian)(pian)(pian)时(shi)用(yong)了(le)502胶水(shui),而502胶水(shui)是(shi)不(bu)导(dao)电(dian)(dian)的(de)(de)(de)。为了(le)实(shi)现导(dao)电(dian)(dian)要求(qiu),故采用(yong)填(tian)充(chong)导(dao)电(dian)(dian)铜(tong)(tong)片(pian)(pian)(pian)的(de)(de)(de)方法,填(tian)充(chong)导(dao)电(dian)(dian)铜(tong)(tong)片(pian)(pian)(pian)时(shi)同(tong)样应注意铜(tong)(tong)片(pian)(pian)(pian)的(de)(de)(de)对称(cheng)布置以(yi)(yi)及铜(tong)(tong)片(pian)(pian)(pian)应同(tong)时(shi)加紧,并(bing)且不(bu)能塞得过(guo)紧以(yi)(yi)免划伤(shang)工(gong)(gong)件(jian)的(de)(de)(de)表面(mian)。不(bu)管是(shi)粘(zhan)贴(tie)连接(jie)铜(tong)(tong)片(pian)(pian)(pian)还是(shi)填(tian)充(chong)导(dao)电(dian)(dian)铜(tong)(tong)缝隙的(de)(de)(de)形(xing)(xing)状。都(dou)应该把(ba)小铜(tong)(tong)片(pian)(pian)(pian)制成圆弧形(xing)(xing),而且还应该用(yong)金相砂布打磨被(bei)锤过(guo)的(de)(de)(de)铜(tong)(tong)片(pian)(pian)(pian)表面(mian),以(yi)(yi)保证铜(tong)(tong)片(pian)(pian)(pian)表面(mian)光滑以(yi)(yi)避免划伤(shang)工(gong)(gong)件(jian)已加工(gong)(gong)过(guo)的(de)(de)(de)表面(mian)。

在采(cai)用(yong)电火花线(xian)(xian)切(qie)割(ge)机加(jia)工(gong)(gong)高(gao)(gao)硬度(du)、高(gao)(gao)精度(du)和高(gao)(gao)复(fu)杂度(du)的(de)小型工(gong)(gong)件时,按照(zhao)上述方(fang)法和步骤(zhou)进(jin)行(xing)线(xian)(xian)切(qie)割(ge)加(jia)工(gong)(gong)中工(gong)(gong)件余留部(bu)位的(de)精密切(qie)割(ge),是一(yi)种行(xing)之有(you)效的(de)方(fang)法,它所(suo)提出的(de)步骤(zhou)和技(ji)巧,经济简便、实用(yong)可(ke)行(xing),从而为改善和提高(gao)(gao)精密线(xian)(xian)切(qie)割(ge)加(jia)工(gong)(gong)的(de)质量和效率(lv)探索出新的(de)途径。


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