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线切割加工时如何确定零件的加工余量

2018/6/6

在进行数控电火花线切割加工工艺设计时如何确定零件的加工余量呢?确定线切割机加工余量的方法有以下三种。

1)查表修正法根据生产实践和试验研究,已将毛坯余量和各种工序的工序余量数据于手册。确定加工余量时,可从手册中获得所需数据,然后结合工厂的实际情况进行修正。查表时应注意表中的数据为公称值,对称表面(轴孔等)的加工余量是双边余量,非对称表面的加工余量是单边的。这种方法目前应用最广。

2)经验估计法此法是根据实践经验确定加工余量。为防止加工余量不足而产生废品,往往估计的数值总是偏大,因而这种方法只适用于单件、小批生产。

3)分析计算法是根据加工余量计算公式和一定的试验资料,通过计算确定加工余量的一种方法。采用这种方法确定的加工余量比较经济合理,但必须有比较全面可靠的试验资料及先进的计算手段方可进行,故目前应用较少。

在确定(ding)电火(huo)花(hua)中走丝线切割机加(jia)(jia)(jia)工(gong)(gong)(gong)(gong)余(yu)(yu)量(liang)(liang)(liang)时,总加(jia)(jia)(jia)工(gong)(gong)(gong)(gong)余(yu)(yu)量(liang)(liang)(liang)和(he)工(gong)(gong)(gong)(gong)序(xu)(xu)(xu)加(jia)(jia)(jia)工(gong)(gong)(gong)(gong)余(yu)(yu)量(liang)(liang)(liang)要分别确定(ding)。总加(jia)(jia)(jia)工(gong)(gong)(gong)(gong)余(yu)(yu)量(liang)(liang)(liang)的(de)(de)(de)大(da)小与选择(ze)的(de)(de)(de)毛(mao)坯制造(zao)精度有(you)关。用查(cha)表法确定(ding)工(gong)(gong)(gong)(gong)序(xu)(xu)(xu)加(jia)(jia)(jia)工(gong)(gong)(gong)(gong)余(yu)(yu)量(liang)(liang)(liang)时,粗加(jia)(jia)(jia)工(gong)(gong)(gong)(gong)工(gong)(gong)(gong)(gong)序(xu)(xu)(xu)的(de)(de)(de)加(jia)(jia)(jia)工(gong)(gong)(gong)(gong)余(yu)(yu)量(liang)(liang)(liang)不应查(cha)表确定(ding),而是用总加(jia)(jia)(jia)工(gong)(gong)(gong)(gong)余(yu)(yu)量(liang)(liang)(liang)减(jian)去各(ge)工(gong)(gong)(gong)(gong)序(xu)(xu)(xu)余(yu)(yu)量(liang)(liang)(liang)求得,同(tong)时要对求得的(de)(de)(de)粗加(jia)(jia)(jia)工(gong)(gong)(gong)(gong)工(gong)(gong)(gong)(gong)序(xu)(xu)(xu)余(yu)(yu)量(liang)(liang)(liang)进行分析,如(ru)果过小,要增加(jia)(jia)(jia)总加(jia)(jia)(jia)工(gong)(gong)(gong)(gong)余(yu)(yu)量(liang)(liang)(liang);过大(da),应适当减(jian)少总加(jia)(jia)(jia)工(gong)(gong)(gong)(gong)余(yu)(yu)量(liang)(liang)(liang),以免造(zao)成浪(lang)费。

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