大連模具加工在現代模具的成形制造中，由于模具的形面設計日趨復雜，自由曲面所占比例不斷增加，因此對模具加工技(ji)術提出了更高要求，即不僅(jin)應保證高的(de)制造(zao)精度和表(biao)面質量，而且要追求加工表(biao)面的(de)美觀。

隨著對高速加工技術研究的不斷深入，尤其在機床加工、數控系統、刀具系統、CAD/CAM軟件等相關技術不斷發展的推動下，高速加工技術已越來越多地應用于模具的制造加工。用機械加工方(fang)法加工模(mo)具(ju)零(ling)部件時要充分(fen)考慮零(ling)件的(de)材(cai)料(liao)、結構形狀、尺(chi)寸、精度和使(shi)用壽命等(deng)方(fang)面(mian)的(de)不同要求(qiu)。

采(cai)用合理的加(jia)工(gong)(gong)方法和(he)工(gong)(gong)藝路線(xian)。盡可能通(tong)過加(jia)工(gong)(gong)設備來保(bao)證模(mo)具零部件(jian)的加(jia)工(gong)(gong)質(zhi)量，減少鉗(qian)工(gong)(gong)修配工(gong)(gong)作量，提高生產效率和(he)降(jiang)低成本。模(mo)具粗加(jia)工(gong)(gong)的主要目標(biao)是追求(qiu)單位時間內的材料去除率，并為半(ban)精加(jia)工(gong)(gong)準備工(gong)(gong)件(jian)的幾何(he)輪廓。

在粗(cu)加(jia)(jia)工(gong)(gong)(gong)(gong)過程中(zhong)通過避免(mian)將刀(dao)具(ju)(ju)埋入工(gong)(gong)(gong)(gong)件(jian)。如加(jia)(jia)工(gong)(gong)(gong)(gong)模具(ju)(ju)型腔(qiang)時，應(ying)避免(mian)刀(dao)具(ju)(ju)垂直插(cha)入工(gong)(gong)(gong)(gong)件(jian)，而應(ying)采用(yong)傾斜(xie)下刀(dao)方式(常用(yong)傾斜(xie)角為20°～30°)，采用(yong)螺旋式下刀(dao)以降(jiang)低刀(dao)具(ju)(ju)載荷；加(jia)(jia)工(gong)(gong)(gong)(gong)模具(ju)(ju)型芯時，應(ying)盡量先從工(gong)(gong)(gong)(gong)件(jian)外部下刀(dao)然后(hou)水平切入工(gong)(gong)(gong)(gong)件(jian)。

粗加(jia)(jia)工(gong)是(shi)基于(yu)體(ti)積模(mo)型(xing)(Volume model)，精加(jia)(jia)工(gong)則是(shi)基于(yu)面模(mo)型(xing)(Su rface model)。而以前開(kai)發的(de)CAD/CAM系(xi)統對零(ling)件的(de)幾何(he)描述是(shi)不連續的(de)，由于(yu)沒有描述粗加(jia)(jia)工(gong)后、精加(jia)(jia)工(gong)前加(jia)(jia)工(gong)模(mo)型(xing)的(de)中間信息，故粗加(jia)(jia)工(gong)表面的(de)剩余(yu)加(jia)(jia)工(gong)余(yu)量(liang)(liang)分布及剩余(yu)加(jia)(jia)工(gong)余(yu)量(liang)(liang)均是(shi)未知的(de)。