大連模具加工根據生產工藝的要求，所選用的加工設備也各不相同。一般包含車削加工用的各種車床、加工孔類的鉆床、鏜床，自由曲面所占比例不斷增加，因此對模具加工技(ji)術提(ti)出(chu)了更高(gao)要求，即不僅應保證高(gao)的制造精度和表面(mian)質量，高(gao)速加工技(ji)術已越(yue)來越(yue)多地應用于(yu)模具的制造加工。

  高(gao)速加(jia)工(gong)技術對(dui)模(mo)(mo)具(ju)加(jia)工(gong)工(gong)藝產生了巨(ju)大影響(xiang)，改變了傳統模(mo)(mo)具(ju)加(jia)工(gong)采(cai)用的(de)“退火→銑削加(jia)工(gong)→熱(re)處理(li)→磨(mo)削”。結(jie)構形狀、尺寸(cun)、精度和使用壽命(ming)等方面(mian)的(de)不(bu)同要(yao)求，采(cai)用合理(li)的(de)加(jia)工(gong)方法和工(gong)藝路線。模(mo)(mo)具(ju)粗加(jia)工(gong)的(de)主要(yao)目(mu)標是追求單位時(shi)間內的(de)材料去除率，并(bing)為半精加(jia)工(gong)準(zhun)備工(gong)件(jian)的(de)幾何輪(lun)廓(kuo)。

  在(zai)粗(cu)加工過程(cheng)中通過利(li)用國(guo)外先進的CAD/CAM軟(ruan)件可通過以下措(cuo)施保持切(qie)削條件恒定(ding)，如加工模具(ju)(ju)(ju)型腔(qiang)時(shi)，應(ying)避(bi)免刀(dao)(dao)具(ju)(ju)(ju)垂直插入(ru)工件，而應(ying)采用傾(qing)(qing)斜下刀(dao)(dao)方式(shi)(常用傾(qing)(qing)斜角為20°～30°)，采用螺(luo)旋(xuan)式(shi)下刀(dao)(dao)以降低刀(dao)(dao)具(ju)(ju)(ju)載(zai)荷；主要(yao)目標是使工件輪廓形狀(zhuang)平整，表面精加工余量均勻，這對(dui)于工具(ju)(ju)(ju)鋼模具(ju)(ju)(ju)尤為重(zhong)要(yao)，因為它(ta)將影(ying)響精加工時(shi)刀(dao)(dao)具(ju)(ju)(ju)切(qie)削層面積(ji)的變(bian)化(hua)(hua)及刀(dao)(dao)具(ju)(ju)(ju)載(zai)荷的變(bian)化(hua)(hua)。

  由于(yu)沒有描述粗加(jia)(jia)工(gong)(gong)(gong)后(hou)、精加(jia)(jia)工(gong)(gong)(gong)前加(jia)(jia)工(gong)(gong)(gong)模型的(de)(de)中間信息，故粗加(jia)(jia)工(gong)(gong)(gong)表面的(de)(de)剩(sheng)(sheng)余(yu)(yu)加(jia)(jia)工(gong)(gong)(gong)余(yu)(yu)量(liang)分布(bu)及(ji)剩(sheng)(sheng)余(yu)(yu)加(jia)(jia)工(gong)(gong)(gong)余(yu)(yu)量(liang)均(jun)是(shi)未知(zhi)的(de)(de)。如局(ju)部銑削工(gong)(gong)(gong)序(xu)的(de)(de)剩(sheng)(sheng)余(yu)(yu)加(jia)(jia)工(gong)(gong)(gong)余(yu)(yu)量(liang)取值(zhi)與粗加(jia)(jia)工(gong)(gong)(gong)相(xiang)等，該工(gong)(gong)(gong)序(xu)只用(yong)一把小直徑銑刀來清除粗加(jia)(jia)工(gong)(gong)(gong)未切到的(de)(de)角(jiao)落，然后(hou)再進行半精加(jia)(jia)工(gong)(gong)(gong)。

  如果大連沖壓模具取(qu)局部銑削(xue)工(gong)(gong)序的(de)(de)(de)(de)(de)剩余加工(gong)(gong)余量值(zhi)作為(wei)半精加工(gong)(gong)的(de)(de)(de)(de)(de)剩余加工(gong)(gong)余量，刀具與工(gong)(gong)件的(de)(de)(de)(de)(de)接觸點隨著加工(gong)(gong)表面(mian)(mian)的(de)(de)(de)(de)(de)曲面(mian)(mian)斜(xie)率(lv)和(he)刀具有(you)效半徑的(de)(de)(de)(de)(de)變化而變化。在(zai)模具的(de)(de)(de)(de)(de)精加工(gong)(gong)中，在(zai)每次(ci)切入(ru)、切出工(gong)(gong)件時，進給方向的(de)(de)(de)(de)(de)改(gai)變應(ying)盡量采用圓弧或曲線(xian)轉(zhuan)接，避免采用直(zhi)線(xian)轉(zhuan)接，以保(bao)持切削(xue)過程的(de)(de)(de)(de)(de)平穩性。