【正文】 ................... 18 點(diǎn)焊機(jī) .................................................................................................................. 19 移動(dòng)式點(diǎn)焊機(jī) ...................................................................................................... 20 本章小結(jié) ..................................................................................................................... 22 第 4 章 轎車車門內(nèi)板焊裝工藝 ................................................................................ 23 前車門結(jié)構(gòu)及其裝配過程 ......................................................................................... 23 前車門總成及其裝配過程 .................................................................................. 23 前車門內(nèi)板總成及其裝配過程 ........................................................................... 23 前車門內(nèi)板的材料 ..................................................................................................... 24 各汽車廠用鋼板型號 .......................................................................................... 24 車門內(nèi)板材料 ...................................................................................................... 26 焊接接頭的型式 ......................................................................................................... 26 焊點(diǎn)的布置原則 ......................................................................................................... 27 焊點(diǎn)的形狀與尺寸 .............................................................................................. 27 點(diǎn)焊的基本要求 .................................................................................................. 27 焊點(diǎn)的布置 .......................................................................................................... 28 點(diǎn)焊的順序 .......................................................................................................... 29 結(jié)構(gòu)的開敞性 ............................................................................................................. 29 精度的合理性 ............................................................................................................. 29 本章小結(jié) ..................................................................................................................... 30 第 5 章 夾具的總體設(shè)計(jì) .............................................................................................. 31 焊接夾具的分類及設(shè)計(jì)要求 ..................................................................................... 31 焊接夾具的分類 .................................................................................................. 31 焊接夾具的設(shè)計(jì)要求 .......................................................................................... 32 焊接夾具設(shè)計(jì)流程圖 ................................................................................................. 32 定位夾緊元件的設(shè)計(jì) ................................................................................................. 32 點(diǎn)焊鉗的選擇 ......................................................................................................................................... 34 主要零件設(shè)計(jì)說明 ...................................................................................................... 36 夾緊單元 （ POST） ............................................................................................ 36 L型板 ................................................................................................................... 36 支撐板（連接板 ） ............................................................................................... 36 壓頭 ....................................................................................................................... 37 夾緊塊 ................................................................................................................... 37 調(diào)整墊片及限位板 ............................................................................................... 37 定位銷 ................................................................................................................... 38 基板 ....................................................................................................................... 38 旋轉(zhuǎn)機(jī)構(gòu) ............................................................................................................... 39 相關(guān)計(jì)算 ...................................................................................................................... 39 壓轉(zhuǎn)臂張開角計(jì)算 ............................................................................................... 39 氣缸夾緊力計(jì)算 ................................................................................................... 40 本章小結(jié) ...................................................................................................................... 42 結(jié)論 ...................................................................................................................................... 43 參考文獻(xiàn) ............................................................................................................................. 44 致謝 ...................................................................................................................................... 46 附錄 ........................................................................................................ 錯(cuò)誤 !未定義書簽。 關(guān)鍵詞 ： 車門內(nèi)板 ； 焊裝夾具 ； 連接板 ； 夾緊機(jī)構(gòu) ； 防撞桿 II ABSTRACT Welding assembly is one of the four techniques used by automotive manufacturing industry. Effective and rapid development of its production system means one of important conditions for the industry’s quick satisfaction to market demand. Clamps are extensively used in the welding assembly, its precision and progress can directly affect automotive manufacturing precision and production period. The door, for example, the welding quality of inner door panels directly affects the entire body’s assembly accuracy, which only can be resolved by qualified welding fixture. Based on the ass