【正文】 證焊件焊后能獲得正確的幾何形狀和尺寸，尤其是保證車(chē)身上門(mén)窗等孔洞的尺寸和形狀。焊接夾具的出現(xiàn)使得金屬結(jié)構(gòu)焊接工藝產(chǎn)生 了巨大變化，由于它極大地方便了焊工操作，提供了效率?？紤]到車(chē)身沖壓件的薄壁特性，因而為確保各零件在焊接處的貼合和相互位置，在焊裝過(guò)程中必須依賴(lài)專(zhuān)用的多點(diǎn)定位夾緊的焊裝 夾具。本文涉及到的內(nèi)容是每個(gè)工位內(nèi)的定位夾緊夾具的設(shè)計(jì)方法。汽車(chē)制造業(yè)的大規(guī)模生產(chǎn)、高密集的資金和技術(shù)投入的特點(diǎn)，要求汽車(chē)制造工藝必須實(shí)現(xiàn)生產(chǎn)效率的提高。相比于普通產(chǎn)品，汽車(chē)產(chǎn)品具有更高的綜合性和技術(shù)復(fù)合性，因而汽車(chē)生產(chǎn)表現(xiàn)出大規(guī)模和技術(shù)密集的特中北大學(xué) 20xx 屆畢業(yè)設(shè)計(jì)說(shuō)明書(shū) 第 2 頁(yè) 共 53 頁(yè) 點(diǎn)，所以汽車(chē)工業(yè)的水平的提高有賴(lài) 于整個(gè)國(guó)家工業(yè)的整體水平。其中，乘用車(chē)產(chǎn)銷(xiāo) 1,382 萬(wàn)輛和 1,375 萬(wàn)輛，同比增長(zhǎng) %和 %。 關(guān)鍵詞： 焊裝夾具 ,設(shè)計(jì)周期 ,制造精度 Automobile welding fixture threedimensional design based on UG Abstract auto jig are important factors to ensure the quality of automobile body welding, influence the manufacturing precision of the whole car and production cycle. To advance the floor before the car assembly welding fixture design as an example this paper introduces the structure characteristic and the basic requirement of the automobile body welding jig, elaborated the automobile body welding jig based on UG threedimensional design method. key words:manufacturing,design cycle,precision welding fixture 中北大學(xué) 20xx 屆畢業(yè)設(shè)計(jì)說(shuō)明書(shū) 第 Ⅰ 頁(yè) 共 Ⅱ 頁(yè) 目 錄 1 緒論 ...................................................................................................................................... 1 我國(guó)汽車(chē)工業(yè)近況 ........................................................................................................... 1 汽車(chē)車(chē)身焊裝夾具綜述 ................................................................................................... 2 車(chē)身焊裝生產(chǎn)線 的組成 ................................................................................................ 2 焊裝夾具在焊接中的作用 ............................................................................................ 2 焊裝夾具 ........................................................................................................................ 3 汽車(chē)焊裝夾具應(yīng)該解決的問(wèn)題 ....................................................................................... 3 UG NX 簡(jiǎn)介 ................................................................................................................ 4 的優(yōu)勢(shì) ........................................................................................................... 5 主要功能 ....................................................................................................... 5 2 汽車(chē)焊裝夾具設(shè)計(jì)的注意事項(xiàng) .......................................................................................... 7 設(shè)計(jì)式樣書(shū)的說(shuō)明 ........................................................................................................... 7 生產(chǎn)過(guò)程 ........................................................................................................................ 7 主要控制斷面的形狀（ MCS） .................................................................................... 8 設(shè)計(jì)中文件管理規(guī)定 ..................................................................................................... 10 文件目錄命名規(guī)則 ...................................................................................................... 10 文件命名規(guī)則 .............................................................................................................. 11 圖層的設(shè)定 .................................................................................................................. 12 文件搜索目錄的配置 .................................................................................................. 12 夾具的具體設(shè)計(jì)過(guò)程 .................................................................................................. 13 夾具中有關(guān)顏色設(shè)置的規(guī)定 ...................................................................................... 14 3 WH10 汽車(chē)焊裝夾具的具體設(shè)計(jì)過(guò)程 ............................................................................. 15 導(dǎo)入 PNL文件 ................................................................................................................ 18 截?cái)嗝? ............................................................................................................................. 18 夾具的整體設(shè)計(jì) ............................................................................................................. 20 確定旋轉(zhuǎn)點(diǎn) .................................................................................................................. 20 中北大學(xué) 20xx 屆畢業(yè)設(shè)計(jì)說(shuō)明書(shū) 第Ⅱ頁(yè) 共Ⅱ頁(yè) 確定汽缸 安裝鉸支點(diǎn)的位置 ...................................................................................... 20 在零件圖中進(jìn)行建模 .................................................................................................. 22 焊接干涉檢查 .............................................................................................................. 24 完成總裝圖 .................................................................................................................. 24 4 WH10 汽車(chē)焊裝夾具設(shè)計(jì)的打開(kāi)狀態(tài) ............................................................................. 25 定義連桿 LINK ............................................................................................................... 25 定義構(gòu)件之間的運(yùn)動(dòng)關(guān)系 JOINT ................................................................................. 25 進(jìn)行夾具打開(kāi)過(guò)程的模擬仿真 ..................................................................................... 27 編輯導(dǎo)出機(jī)構(gòu)的顯示 ..................................................................................................... 30 畫(huà)車(chē)線 ............................................................................................................................. 32 5 二維圖的生成 .................................................................................................................... 34 二維圖的出圖標(biāo)準(zhǔn) .......................................................................................................