【正文】 1 基于 Mastercam X5 棘輪零件三維設(shè)計及自動編程 2 【 摘要 】 本文主要闡述棘輪零件的三維造型及數(shù)控加工，內(nèi)容包括零件圖的工藝分析、工件的裝夾方案、零件的加工工藝分析、工藝流程、程序設(shè)計等，其中零件圖的工藝分析包括零件圖的完整性及正確性、材料、技術(shù)要求、結(jié)構(gòu)工藝性等方面的分析；裝夾方案包括毛坯的選擇、機床的選擇、夾具的選擇；加工工藝分析包括加工順序的安排、刀具的選擇、切削用量的選擇等等。這些都是零件加工的重要組成部分，要使零件的加工精度，效率得到提高，就必須先 對零件進行分析，確定好正確的工藝流程，使用 Mastercam 軟件對零件進行三維造型和數(shù)控加工，充分發(fā)揮數(shù)控機床的高精度，高效率的特性。 關(guān)鍵詞 ： 工藝分析、裝夾方案、工藝流程、三維造型、自動編程 Abstract: This paper mainly discusses the 3D modeling and NC machining of ratchet parts, including parts of the process analysis, workpiece clamping scheme, parts of the process analysis, process, program design, the process of parts drawing analysis includes parts of the integrity and correctness, materials, technical requirements, construction technology and so on。 the clamping scheme includes the choice of blank, the choice of machine tools, jig choice。 analysis of the technological process including the sequencing of machining, tool selection, cutting the amount of choice etc.. These are an important part of machining, the machining accuracy of parts, improve the efficiency, we must first on the parts for analysis, determine the correct process, 3D modeling and NC machining of parts using the Mastercam software, give full play to the high accuracy of numerical control machine, high efficiency characteristics. Key words: Process analysis, clamping scheme, process flow, threedimensional modeling, automatic programming 3 目 錄 1 緒論 ........................................................................................................................................................................ 5 數(shù)控加工技術(shù)概述 ...................................................................................................................................... 5 數(shù)控銑削加工技術(shù) ...................................................................................................................................... 6 本課題的主要任務(wù) ...................................................................................................................................... 6 2 零件的三維造型設(shè)計 ......................................................................................................................................... 7 軟件的選擇 ................................................................................................................................................... 7 零件的三維造型設(shè)計 .................................................................................................................................. 8 繪制頂蓋 ............................................................................................................................................... 8 底座的繪制 .........................................................................................................................................10 實體的結(jié)合 ......................................................................................................................................... 11 圓角的生成 .........................................................................................................................................12 實體抽殼 .............................................................................................................................................12 開口 ......................................................................................................................................................13 六邊形凸臺的生成 ............................................................................................................................14 孔的生成 .............................................................................................................................................15 本章小結(jié) ...................................................................................................................................................... 15 3 零件的工藝規(guī)程設(shè)計 .......................................................................................................................................16 零件的工藝分析 ......................................................................................................................................... 16 零件的結(jié)構(gòu)特點工藝性分析 ..........................................................................................................16 毛坯的選擇 ................................................................................................................................................. 16 定位基準的選擇 ......................................................................................................................................... 17 裝夾方式的選擇 ......................................................................................................................................... 17 工序及工步的劃分 .................................................................................................................................... 17 刀具的選擇 .................................