【正文】 gineering, has been more widely used in industry. In order to solve the plastic product appearance design cycle long difficulties， This research a mouse shape modelling of reverse engineering and the methods to reverse engineering concept, methods, systematic expatiation on the mouse again at the same time as an example of the mouse shape introduced in detail the steps to reverse engineer. Will reverse engineering technology is applied to plastic mouse die design and manufacture, so as to realize the rapid injection mold design and manufacturing. This topic is the base of the reverse design is the mouse with mold design, first adopt three coordinates measuring instrument gathering data, using UG and Imageware software to the point cloud data processing, model reconstruction. Then through the plastic parts for process analysis and parison, the final design out a pair of injection mold to produce a mouse base plastic product, in order to realize automation to increase production. This topic from product structure technology, based on the mould structure, specific to mould gating system, the structure of its molding part, ejection system, cooling system, the injection molding machine selection and related parameter checking, have detailed design, according to the specific structure of mouse base the mould is latent type gate of single parting surface injection mould, through the whole design process shows that the mold can achieve the required plastic parts processing. Key Words： Reverse Engineering； Point Cloud； Mouse； Injection Mold； Parting Surface 目 錄 1 緒 論 ................................................................. 1 選題背景及意義 .................................................... 1 模具的種類 ........................................................ 1 模具的應用 ........................................................ 1 逆向工程原理 ...................................................... 2 逆向工程特點 ...................................................... 2 逆向建模的一般流程圖 .............................................. 3 逆向工程的應用領域 ................................................ 3 2 逆向建模 ............................................................. 4 逆向工程一般步驟 .................................................. 4 實體三維數(shù)據(jù)的獲得 —— 掃描 .................................. 4 點云處理 .................................................... 5 曲面重構 .................................................... 5 實體建模 .................................................... 6 逆向工程軟硬件設備 ................................................ 6 掃描設備 .................................................... 6 點云曲面處理軟件 ............................................ 7 實體建模軟件 ................................................ 9 鼠標外形逆向開發(fā)的流程 ............................................ 9 模型分析 .................................................... 9 掃描 ........................................................ 9 點云數(shù)據(jù)清理 ............................................... 10 數(shù)據(jù)對齊 ................................................... 11 點云分割提取各特征的點云 ................................... 12 曲線構造 ................................................... 13 曲面構造 ................................................... 13 實體構造 ................................................... 14 鼠標其它特征創(chuàng)建 ........................................... 14 質(zhì)量評估檢測 .............................................. 14 3 鼠標底座塑料零件分析 ................................................. 16 零件的結構和特點 ................................................. 16 塑料件的材料 ..................................................... 16 對塑料的認識 ............................................... 16 塑料的成型工藝特點 ......................................... 17 常用塑料及特性 ............................................. 17 工程塑料（ ABS）的特性及注射工藝性 .......................... 18 鼠標底座塑料件的參數(shù) ............................................. 19 4 注射機的選用 ......................................................... 20 選用注射機的方法和原則 ........................................... 20 注射機的種類和應用范圍 ........................................... 20 注射機的選用 ..................................................... 20 常用注射機 ................................................. 20 注射機參數(shù)的校核 ................................................. 22 最大注射量的校核 ........................................... 22 注射壓力的校核 ............................................. 22 鎖模力的校核 ............................................... 22 最大注射成型面積的校核 ..................................... 22 5 塑料注射模具設計 ..................................................... 23 型腔數(shù)目和分布 ................................................... 23 分型面的選擇 ..................................................... 24 型芯和型腔 ....................................................... 24 型芯和型腔的結構 ........................................... 24 型芯和型腔的尺寸 ........................................... 26 型腔的結構設計 ............................................. 26 型芯的結構設計 ............................................. 26 型腔、型芯內(nèi)鑲件結構設計 ................................... 26 澆注系統(tǒng) ......................................................... 26 主流道和冷料井設計 ......................................... 26 分流道設計 ................................................. 27 澆口設計 ................................................... 27 頂出機構 ......................................................... 28 頂出機構的作用和種類 ....................................... 28 頂桿推出機構的組成 ......................................... 28 頂桿頂出機構的設計 ......................................... 29 導向機構 ......................................................... 29 導向機構的作用和組成 ....................................... 29 導柱的設計 ................................................. 30 導套的設計 ...................