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畢業(yè)設(shè)計（論文）任務(wù)書
I、畢業(yè)設(shè)計(論文)題目：
汽車前燈罩的沖壓模具設(shè)計
II、畢 業(yè)設(shè)計(論文)使用的原始資料(數(shù)據(jù))及設(shè)計技術(shù)要求：
1. 燈罩零件圖
2.生產(chǎn)綱領(lǐng)：中等批量
3.要求完成零件的沖壓工藝分析和沖壓工藝規(guī)程的編制。
1) 分析沖件成形工藝及坯料展開
2）編制燈罩零件沖壓工藝
3）完成燈罩模具設(shè)計
III、畢 業(yè)設(shè)計(論文)工作內(nèi)容及完成時間：
1. 查閱相關(guān)資料，外文資料翻譯（6000字符以上），撰寫開題報告。
第1周—第2周
3.繪制燈罩板沖件圖，分析沖件成形工藝及坯料展開 第3周—第6周
4.編制燈罩沖壓成形工藝規(guī)程； 第7周—第8周
5.繪制燈罩模具總裝圖及零件圖； 第9周—第13周
6.撰寫畢業(yè)設(shè)計說明書（論文） 第14周—第16周
7.畢業(yè)設(shè)計審查，畢業(yè)答辯。 第17周
Ⅳ 、主 要參考資料：
1.《沖模設(shè)計手冊》編寫組.沖模設(shè)計手冊.北京：沖模設(shè)計手冊，1995
2. 陳為國.帶缺口筒形件沖壓工藝及模具設(shè)計.金屬成形工藝，1998.2
3.王新華，袁聯(lián)富編.沖模結(jié)構(gòu)圖冊.北京：機(jī)械工業(yè)出版社，2003
4.羅益旋.沖壓新工藝新技術(shù)及模具設(shè)計實用手冊. 銀聲音像出版社，2004
5. GB2851～2875《冷沖?！穱覙?biāo)準(zhǔn)
航空與機(jī)械工程 系 機(jī)械設(shè)計制造及其自動化 專業(yè)類 0781053 班
學(xué)生（簽名）：
填寫日期： 2011 年 01 月 03 日
指導(dǎo)教師（簽名）：
助理指導(dǎo)教師(并指出所負(fù)責(zé)的部分)：
機(jī)械設(shè)計制造及其自動化 系主任（簽名）：
附注:任務(wù)書應(yīng)該附在已完成的畢業(yè)設(shè)計說明書首頁。
附錄：燈罩零件圖
畢業(yè)設(shè)計（論文）外文文獻(xiàn)翻譯
題目 汽車前燈罩的沖壓模具設(shè)計
專 業(yè) 名 稱 機(jī)械設(shè)計制造及其自動化
班 級 學(xué) 號 078105319
學(xué) 生 姓 名 聶文軍
指 導(dǎo) 教 師 陳為國
填 表 日 期 2011 年 05 月 20 日
Mould type of numerical control process computer assist the cutter choose and study
Foreword
Numerical control include cutter production and cutter of orbit choose two key problems process ,. The first problem has been got and studied extensivly and deeply over the past 20 years, a lot of algorithms developed have already got application in commercial CAD/ CAM system. Most CAM systems can produce the cutter orbit automatically after users input relevant parameters at present. Comparatively speaking , it is still not ripe to regard quality , efficiency as the research of choosing the problem of cutter of optimizing the goal correctly, do not have commercial CAM system that can offer the preferred decision support tool of cutter at present, therefore it is difficult to realize the integrating automatically and organically of CAD/ CAM.. The cutter is chosen to usually include cutter type and cutter size. Generally speaking , suitable for one processing cutter of target for much kind , one cutter can finish different processing tasks, so it is easier to only consider meeting the cutter that basically processes the requirement and choose, especially to geometirc characteristics of model such as the hole , trough ,etc.. But in fact, it is common for cutter to choose and sure optimization goal interrelate, for instance most heavy to cut efficiency , process time , minimum process cost , longest service life ,etc. at least, so the cutter is chosen it is a complicated optimization question. Such as mould type one of parts, because the geometirc form is complicated (usually include curved surface of freedom and island), influence geometry that cutter choose it restrains from to be can explicit to say among CAD model, need to design the corresponding algorithm to draw, therefore choose the cutter specification suitable and cutter association , it is not easy things by improving efficiency and quality processed in numerical control.
Mould type generally with preparation method that numerical control mill, usually including rough machining, half finish machining , precise process of processing etc.. The principle of rough machining is to spare no effort to remove the surplus metal with high efficiency, therefore hope to choose the larger cutter, but the cutter is oversized, may cause the increase of the crude volume ; Half finish machining of tasks to remove rough machining leave over step that get off mainly; Finish machining mainly guarantees size of the part and surface quality. Consider , go on , select exist , sure by computer difficult automatically totally up till now, therefore assist the cutter to choose in the computer that we developed (Computer Aided Tool Selection , CATS) among the system, base on , provide one aid decision tool for user, rough machining , half finish machining , precise to process etc., the real policy-making power is still left to users, in order to give full play to the advantages of computer and people.
1 Basic structure of the system
CATS system is CAD model, output for cutter type , cutter specification , mill depth of sharpening , enter the giving amount , rotational speed of main shaft (cut the pace ) and process six parameters such as time (such as Fig. 1), including choosing the aid decision tool in cutter type, rough machining cutter choose aid decision tool, half finish machining cutter choose aid decision tool and finish machining cutter choose aid decision tool ,etc.
Given the rough machining in Xingqiang processing of the important position (usually rely time 5~10 times), rough machining, the system automatically optimize portfolio with cutlery functions to enhance overall processing efficiency. In addition to the decision-making tools, the system also has a detailed look cutlery norms, based on the type and size cutlery recommended processing parameters and assess the function of processing time, the last generation of the overall results of choice cutlery statements (figure 2). All the data and knowledge systems cutlery done by the background database support.
2 Key technologies and algorithms
2.1 Cutlery type choice
According to Assistant Xingqiang digital processing practice, Xingqiang Xi state general processing cutlery into milling cutter, milling cutter radius milling cutter and the first three balls. D based cutlery diameter, radius radius r when r=0 for milling cutter, 0
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