為(wei)什么說(shuo)加(jia)(jia)工(gong)(gong)(gong)(gong)速(su)度(du)這一(yi)工(gong)(gong)(gong)(gong)藝指(zhi)標(biao)在(zai)(zai)注塑(su)成型中(zhong)十(shi)分(fen)重要，因(yin)為(wei)不僅(jin)關系到(dao)制件(jian)(jian)的加(jia)(jia)工(gong)(gong)(gong)(gong)周(zhou)期，而(er)且(qie)還決定著(zhu)加(jia)(jia)工(gong)(gong)(gong)(gong)的經濟成本(ben)。我(wo)們常說(shuo)的電火(huo)花成形加(jia)(jia)工(gong)(gong)(gong)(gong)速(su)度(du)是指(zhi)在(zai)(zai)一(yi)定脈沖參數條(tiao)件(jian)(jian)下，相同單位時間內工(gong)(gong)(gong)(gong)件(jian)(jian)被蝕除掉的一(yi)定的質量和(he)體積，可(ke)分(fen)別(bie)用體積加(jia)(jia)工(gong)(gong)(gong)(gong)速(su)度(du)或質量加(jia)(jia)工(gong)(gong)(gong)(gong)速(su)度(du)來表示

在(zai)相同的(de)表面粗(cu)糙度(du)的(de)模(mo)具(ju)鋼材上，相對電脈(mo)沖在(zai)電極損耗時(shi)的(de)所產(chan)生的(de)zui大(da)加(jia)(jia)(jia)工(gong)(gong)速(su)(su)度(du)，是衡(heng)量電脈(mo)沖加(jia)(jia)(jia)工(gong)(gong)和機床(chuang)(chuang)工(gong)(gong)藝性(xing)能的(de)重要指標。一般情況下的(de)生產(chan)廠給出的(de)是zui大(da)加(jia)(jia)(jia)工(gong)(gong)電流，在(zai)zui佳加(jia)(jia)(jia)工(gong)(gong)狀態下所能達到的(de)zui高的(de)加(jia)(jia)(jia)工(gong)(gong)速(su)(su)度(du)。因此在(zai)我們實際加(jia)(jia)(jia)工(gong)(gong)時(shi)，由(you)于被加(jia)(jia)(jia)工(gong)(gong)件(jian)尺寸與形狀的(de)千變萬(wan)化，加(jia)(jia)(jia)工(gong)(gong)條件(jian)和排屑條件(jian)等與理想(xiang)狀態不同，即(ji)使在(zai)加(jia)(jia)(jia)工(gong)(gong)中心(xin)粗(cu)加(jia)(jia)(jia)工(gong)(gong)時(shi)，加(jia)(jia)(jia)工(gong)(gong)速(su)(su)度(du)也(ye)往往大(da)大(da)低(di)于機床(chuang)(chuang)的(de)zui大(da)加(jia)(jia)(jia)工(gong)(gong)速(su)(su)度(du)指標。

每個(ge)(ge)注塑(su)加工脈(mo)(mo)(mo)沖(chong)(chong)放電的(de)(de)時候都會在(zai)工件(jian)表面留下(xia)一(yi)個(ge)(ge)微(wei)小(xiao)的(de)(de)凹坑(keng)(keng)，凹坑(keng)(keng)的(de)(de)大(da)(da)小(xiao)、蝕除(chu)材料(liao)的(de)(de)多(duo)(duo)少與脈(mo)(mo)(mo)沖(chong)(chong)能(neng)(neng)量近似成(cheng)正比(bi)關系，即脈(mo)(mo)(mo)沖(chong)(chong)能(neng)(neng)量越(yue)大(da)(da)，傳遞給工件(jian)上(shang)的(de)(de)熱量就(jiu)會越(yue)多(duo)(duo)，被蝕除(chu)的(de)(de)材料(liao)也越(yue)多(duo)(duo)。從理論上(shang)講的(de)(de)話(hua)電火(huo)花成(cheng)形(xing)加工速(su)度(du)正比(bi)于單(dan)個(ge)(ge)脈(mo)(mo)(mo)沖(chong)(chong)能(neng)(neng)量和放電頻(pin)率，但在(zai)實際加工中(zhong)，單(dan)個(ge)(ge)脈(mo)(mo)(mo)沖(chong)(chong)的(de)(de)作用(yong)不是單(dan)獨體現(xian)的(de)(de)，而是多(duo)(duo)個(ge)(ge)脈(mo)(mo)(mo)沖(chong)(chong)共同作用(yong)的(de)(de)結果，脈(mo)(mo)(mo)沖(chong)(chong)電源是連續不斷地以脈(mo)(mo)(mo)沖(chong)(chong)狀(zhuang)態向加工間隙輸送能(neng)(neng)量，其(qi)過程就(jiu)復雜得多(duo)(duo)，加工速(su)度(du)是和脈(mo)(mo)(mo)沖(chong)(chong)放電時間、脈(mo)(mo)(mo)沖(chong)(chong)間隔(ge)、脈(mo)(mo)(mo)沖(chong)(chong)放電電流、脈(mo)(mo)(mo)沖(chong)(chong)波形(xing)、加工對象(xiang)性能(neng)(neng)、電極材料(liao)、排屑條件(jian)等有(you)關的(de)(de)多(duo)(duo)元(yuan)函數。

加工速(su)(su)度(du)在模(mo)具注(zhu)塑(su)加工中十(shi)分重要(yao)。因為這是(shi)塑(su)料(liao)產品出(chu)樣(yang)的(de)(de)(de)前提條件(jian)。如果客戶要(yao)求(qiu)質(zhi)量(liang)好點的(de)(de)(de)基礎上(shang)再提前交樣(yang)的(de)(de)(de)話，加工時間和速(su)(su)度(du)是(shi)zui主要(yao)的(de)(de)(de)。