【正文】 ...............................................................15 零件的結(jié)構(gòu)特點(diǎn)工藝性分析 ...............................................................................................15 毛坯的選擇 ...................................................................................................................................15 定位基準(zhǔn)的選擇 ...........................................................................................................................16 裝夾方式的選擇 ...........................................................................................................................16 工序及工步的劃分 .......................................................................................................................16 刀具的選擇 ...................................................................................................................................16 切削用量的選擇 ...........................................................................................................................17 工藝卡片的制定 ...........................................................................................................................18 工藝過程卡 ...........................................................................................................................18 數(shù)控加工工序卡 ...................................................................................................................19 本章小結(jié) .......................................................................................................................................204 零件的 MASTERCAM 自動(dòng)編程及仿真加工 .................................................................................20 刀路設(shè)計(jì)前的準(zhǔn)備 .......................................................................................................................20 毛坯的設(shè)置 ...................................................................................................................................21 刀具的設(shè)置 ...................................................................................................................................21 工序 3 加工型腔部分的刀路設(shè)計(jì) ...............................................................................................22 工步 1 開粗的刀路設(shè)計(jì) .......................................................................................................22 工步 2 半精加工壁邊及六邊形凸臺(tái)輪廓的刀路設(shè)計(jì) .......................................................23 工步 3 精加工腔底及六邊形凸臺(tái)表面的刀路設(shè)計(jì) ...........................................................25 工步 4 精加工壁邊及半精加工型腔喇叭錐面的刀路設(shè)計(jì) ...............................................27 工步 5 精修六邊形凸臺(tái)輪廓的刀路設(shè)計(jì) ...........................................................................284 工步 6 精加工喇叭錐面的刀路設(shè)計(jì) ...................................................................................28 鉆孔的刀路設(shè)計(jì) ...................................................................................................................30 工序 4 銑凸臺(tái)及外形的刀路設(shè)計(jì) ...............................................................................................31 工步 1 開粗的刀路設(shè)計(jì) .......................................................................................................31 工步 2 精加工外輪廓的刀路設(shè)計(jì) .......................................................................................32 工步 3 半精加工凸臺(tái)輪廓 ...................................................................................................33 工步 4 精加工凸臺(tái)交接面 ...................................................................................................34 工步 5 精加工凸臺(tái)及圓角 ...................................................................................................34 后處理設(shè)置（加工程序的生成） ...............................................................................................35 仿真加工 .......................................................................................................................................39結(jié) 束 語 ..................................................................................................................................................41謝 辭 ........................................................................................................................................................42參 考 文 獻(xiàn) ............................................................................................................................................4351 緒論 數(shù)控加工技術(shù)概述數(shù)字控制簡稱數(shù)控（NC） ，是近代發(fā)展起來的一種自動(dòng)控制技術(shù)，是用數(shù)字化信息實(shí)現(xiàn)設(shè)備控制的一種方法，在數(shù)控加工技術(shù)方面得到了廣泛的應(yīng)用。關(guān)鍵詞： 工藝分析、裝夾方案、工藝流程、三維造型、自動(dòng)編程Abstract: This paper mainly discusses the 3D modeling and NC machining of ratchet parts, in