【正文】 沈陽航空航天大學(xué)畢業(yè)設(shè)計(jì) (論文 ) I 摘 要 現(xiàn)今，機(jī)械行業(yè)廣泛采用 CAD/CAM 技術(shù)，并通過數(shù)控機(jī)床進(jìn)行加工，大大縮短了產(chǎn)品的開發(fā)和制造周期，提高了產(chǎn)品的技術(shù)含量，降低了成本。 本論文中詳細(xì)的闡述了變速箱的三維建模和數(shù)控編程過程，應(yīng)用 UG 實(shí)現(xiàn)了零件的三維建模，在 UG 環(huán)境中進(jìn)行了數(shù)控仿真加工，并生成了 NC 仿真加工程序。 論文共分四個(gè)部分，在第一部分簡單的介紹了 CAD/CAM 技術(shù)；第二部詳細(xì)介紹了基于 UG 的三維實(shí)體建模；第三部分詳細(xì)介紹了基于 UG 的數(shù)控加工技術(shù)；第四部分講述了經(jīng)濟(jì)性分析。 本課題通過對變速箱箱體零件設(shè)計(jì)加工過程的分析，以 UG 軟 件為基礎(chǔ)，對變速箱箱體進(jìn)行了設(shè)計(jì)，并對其進(jìn)行了加工工藝分析，同時(shí)運(yùn)用 UG 軟件對其進(jìn)行了數(shù)控加工，實(shí)現(xiàn)了從設(shè)計(jì)到生產(chǎn)的一體化，對實(shí)際生產(chǎn)有一定的指導(dǎo)意義。 關(guān)鍵詞： CAD/CAM；變速箱；三維建模；數(shù)控加工；仿真模擬； NC 代碼 基于 UG 的變速箱設(shè)計(jì)及 CAM 技術(shù)研究 II Gearbox design based on UG and CAM technology Abstract At present， the machinery industry widely used CAD / CAM technology and the numerical control machine tool for machining through the process, greatly reducing the product development and manufacturing cycle,improving the technology of products, and to reduce the cost. Paper describes in detail the transmission of threedimensional modeling and numerical control programming. The application of UG realizes threedimensional modeling of parts in UG CNC simulation environment for the conduct of the process, and generates the NC machining simulation program. Thesis is divided into five parts. In the first part introduces CAD/CAM briefly。 The second section details the threedimensional solid modeling。 The third section details based on UG CNC machining technology。 The fourth section describes the economic analysis. This topic through parts of gearbox design process analysis to UG software based on the transmission box was designed, and its analysis of the machining process, while the use of UG software from CNC processing to achieve the integration from design to production, actual production has some significance. Keywords : CAD/CAM 。 gearbox 。 threedimensional modeling 。 CNC Machining 。 Processing simulation 。 NC code 。 沈陽航空航天大學(xué)畢業(yè)設(shè)計(jì) (論文 ) III 目錄 1 CAD/CAM 技術(shù)在產(chǎn)品制造中的應(yīng)用 ............................................................................. 1 CAD/CAM 技術(shù)概述 ............................................................................................... 1 CAD/CAM 技術(shù)的基本概念 ......................................................................... 1 CAD/CAM 技術(shù)的發(fā)展歷程 ......................................................................... 2 CAD/CAM 技術(shù)的發(fā)展趨勢 ......................................................................... 4 CAD/CAM 技術(shù)開發(fā)熱點(diǎn) ............................................................................. 5 CAD/CAM 技術(shù)的應(yīng)用 ........................................................................................... 5 UG 軟件介紹 ............................................................................................................ 7 UG NX 系統(tǒng)簡介 .......................................................................................... 7 UG 的發(fā)展現(xiàn)狀、應(yīng)用及其發(fā)展前景 .......................................................... 9 本課題研究的主要內(nèi)容 ........................................................................................ 10 2 基于 UG 的變速箱實(shí)體模型設(shè)計(jì) ....................................................................................11 NX 建模的基本概念 ..............................................................................................11 NX 建模流程 ..........................................................................................................11 原創(chuàng)產(chǎn)品設(shè)計(jì) ..............................................................................................11 圖紙?jiān)煨? ..................................................................................................... 12 逆向工程 ..................................................................................................... 13 設(shè)計(jì)思想 ............................................................................................................... 13 草圖的優(yōu)化設(shè)計(jì) ......................................................................................... 14 合理應(yīng)用特征建立零件實(shí)體模型 ............................................................. 14 基于 UG 對變速箱進(jìn)行實(shí)體建模 .......................................... 錯(cuò)誤 !未定義書簽。 二維工程圖紙 ......................................................................... 錯(cuò)誤 !未定義書簽。 創(chuàng)建新圖紙 ................................................................... 錯(cuò)誤 !未定義書簽。 導(dǎo)入模型視圖 ............................................................... 錯(cuò)誤 !未定義書簽。 添加圖紙格式 ............................................................... 錯(cuò)誤 !未定義書簽。 添加尺寸 ....................................................................... 錯(cuò)誤 !未定義書簽。 3 基于 UG 的零件數(shù)控加工技術(shù) ....................................................................................... 14 數(shù)控加工技術(shù)的主要內(nèi)容 ................................................................................... 14 數(shù)控銑削加工技術(shù)的工藝適應(yīng)性 ............................................................. 15 數(shù)控加工工藝分析 ................................................................................................ 16 基于 UG 的變速箱設(shè)計(jì)及 CAM 技術(shù)研究 IV 數(shù)控加工工藝概念 ..................................................................................... 16 數(shù)控機(jī)床的選用 ......................................................................................... 16 被加工零件的結(jié)構(gòu)材料分析 ..................................................................... 16 零件的加工工序方案制定 .......................................................................... 17 數(shù)控加工中心的工藝適應(yīng)性 ..................................................................... 19 零件的加工方案 ......................................................................................... 19 刀具材料的選擇及參數(shù)確定 ..................................................................... 20 切削液的選擇 ............................................................................................. 21 切削液的選取 ............................................................................................. 22 工件的定位與加緊 .................