【正文】 ， The positioning of the workpiece clamping quickly, quickly, labor saving, reduces the welding assembly positioning and clamping of the heavy manual order to ensure the weld size, improve the assembly precision and efficiency, to prevent the deformation of the welding realization of mechanization, easy to change rapidly, make the space position of welding conditions into a flat position better welding condition, the improvement of working conditions, but also conducive to improve the quality of the the overall program, positioning fixture, pneumatic clamping part, finally is the specific folder design. Because the welding fixture, some parts need to be rotated. For welding, when welding two pieces of the best and most powerful position, namely the welding positioner, which can solve this problem, easy welding. This paper firstly analyzes the automobile seat frame welding fixture design the necessity and feasibility。 focus on the automobile seat frame of welding process analysis, study on the seat fixture clamping position and correct positioning design。 then on the seat frame welding fixture design as the core, through the analysis of structural characteristics of the production line, the automobile welding jig, sums up the design of welding fixture and the step points。 through the process of seat frame analysis, design of the substrate, mounting plate, positioning device, clamping mechanism. Reasonable selection of the cylinder, the final pletion of the structure design of seat frame welding fixture Key words: Tooling； fixtures； pneumatic； welding 沈陽(yáng)工學(xué)院畢業(yè)論文 III 目 錄 摘要 .................................................................... I Abstract.................................................................................................................................... II 第 1 章 緒論 ........................................................................................................................... 1 課題的背景及意義 ................................................................................................... 1 汽車座椅 國(guó)內(nèi) 研究現(xiàn) 狀 ........................................................................................... 2 焊裝夾具 研究概況 ................................................................................................... 2 焊裝線發(fā)展過(guò)程及目前的現(xiàn)狀 .................................................................... 2 焊裝生產(chǎn)線的組成 ............................................ 4 焊裝夾具設(shè)計(jì)基本要求 ........................................ 4 夾具的基本構(gòu)成 .............................................. 5 夾具的設(shè)計(jì)步驟 .............................................. 6 本 課題 研究 內(nèi)容 及意義 ........................................................................................... 6 第 2 章 汽車座椅 焊接工藝 ................................................................................................... 7 汽車座椅的 組成 ....................................................................................................... 7 焊接結(jié)構(gòu)件 材料 的 選擇 ........................................................................................... 7 焊接方法及 焊接工藝 ............................................................................................... 7 焊接材料的選擇 ....................................................................................................... 8 焊接 缺陷及防止措施 ............................................................................................... 8 第 3 章 基于座椅骨架 夾具的設(shè)計(jì) ..................................................................................... 10 基準(zhǔn)面的選擇 .................................................................................................. 10 定位器 的設(shè)計(jì) .................................................................................................. 11 夾具體的設(shè)計(jì) .................................................................................................. 12 夾緊裝置的設(shè)計(jì) .............................................................................................. 16 第 4 章 結(jié)論 ............................................................ 18 參考文獻(xiàn) ............................................................................................................................... 19 致謝 ..........................................................................................................