汽車輪轂盤的反求造型研究

論文編號:JX1643  論文字?jǐn)?shù):15803.頁數(shù):44 附開題報(bào)告，外文翻譯

輪轂盤的反求造型與數(shù)控加工編程
摘要：汽車輪轂盤的反求工程技術(shù)在汽車的設(shè)計(jì)生產(chǎn)中應(yīng)用相當(dāng)廣泛，它是國內(nèi)汽車制造業(yè)學(xué)習(xí)國外的先進(jìn)設(shè)計(jì)思想、設(shè)計(jì)理念，大大降低了產(chǎn)品的開發(fā)成本、縮短了研發(fā)周期、增強(qiáng)了企業(yè)的競爭力，為企業(yè)提供了產(chǎn)品的快速開發(fā)能力，是提高設(shè)計(jì)水平不可缺少的重要手段。
 文章首先闡述了反求工程的基本概念、反求工程的國內(nèi)外研究概況及發(fā)展趨勢，反求造型的過程，通過對零件表面信息的獲取、測量數(shù)據(jù)預(yù)處理、零件三維模型的重建和加工來完成反求工程的實(shí)現(xiàn)。重點(diǎn)研究了汽車輪轂盤的反求造型及通過UG進(jìn)行數(shù)控加工編程。其次，在反求造型過程中，利用點(diǎn)云模型，運(yùn)用反求造型的基本方法，開拓了創(chuàng)建思路，掌握了投影曲線、橋接曲線、截面曲線、擴(kuò)大曲面、偏置曲面、掃掠曲面、直紋曲面、通過曲線網(wǎng)格曲面、修剪和延伸特征、變半徑面倒圓特征等創(chuàng)建的基本技巧。再次，通過對輪轂盤上下表面進(jìn)行創(chuàng)建程序、創(chuàng)建加工刀具、創(chuàng)建幾何體、工件創(chuàng)建、創(chuàng)建方法、創(chuàng)建操作、型腔銑切削參數(shù)的設(shè)置、加工刀具路徑生成及刀具路徑的模擬，完成數(shù)控加工編程。最后，通過后置處理，得到數(shù)控加工代碼。
關(guān)鍵字:  反求工程；點(diǎn)云模型；數(shù)控加工編程；數(shù)控加工代碼。

Reverse wheel drive model and
NC Programming
Abstract ：Wheel drive vehicle in reverse engineering technology in the car design and production of a wide range of applications, it is the domestic auto industry to learn from the advanced design ideas, design concepts, greatly reducing product development costs, shorten the development cycle, enhance the enterprise competitiveness, and provide rapid product development capability, it is designed to improve the level of an important and indispensable tool.
 Firstly，This paper described the basic concept of reverse engineering, reverse engineering of domestic and international situation and development trend of the reverse modeling process, through access to information on the parts surface, measurement data preprocessing, reconstruction of three-dimensional model parts and processing to complete the implementation of reverse engineering. Basic steps and key technology of the automobile wheel drive anti-seeking by UG for modeling and NC programming. Secondly, modeling the process in reverse, using the point cloud model, using the basic method of reverse modeling, to create ideas to develop and master the projection curve, bridge curve, cross-section curve, the expansion surfaces, offset surfaces, swept surfaces, ruled surface, through curve mesh surfaces, trim and extended features, variable radius circular surface characteristics down to create the basic skills. Thirdly, through the wheel drive up and down the surface to create programs to create cutting tools, create geometry, the work piece to create, create method, create operation, cavity milling machining parameter settings, machining tool path generation and tool path simulation, the completion of NC Programming . Finally, it obtained the NC code by post-processing.
 Keyword:  Reverse Engineering;  Point Cloud Models;  NC Programming;      NC code.

目    錄
1  引言
 1.1 課題的背景及意義（ 1）
 1.2 國內(nèi)外研究概況及發(fā)展趨勢（ 3）
 1.3 反求工程主要步驟及關(guān)鍵技術(shù)（ 6）
 1.4 本文研究的主要內(nèi)容（ 8）
2  反求輪轂盤造型
 2.1 繪制輪轂盤外形（ 9）
 2.2 創(chuàng)建輪轂盤上的半月孔（11）
 2.3 創(chuàng)建輪轂盤中間小孔（18）
 2.4 創(chuàng)建輪轂盤上的標(biāo)志（24）
 2.5 創(chuàng)建輪轂盤實(shí)體（26）
3  基于UG的輪轂盤數(shù)控加工編程
 3.1 創(chuàng)建輪轂盤上表面加工程序（28）
 3.2 創(chuàng)建輪轂盤下表面的加工程序（34）
 3.3 生成的部分?jǐn)?shù)控加工代碼（35）
4  總結(jié)
 4.1 總結(jié)（39）
參考文獻(xiàn)·（40）
致    謝（41）