CATIA CAA對象擴展是自定義對象的主要途徑，也是當前的開發難點?；陔娮韬腹に噮岛图s束條件分析，提出了以CAA用戶界面設計、自定義對象、參數驗證和實體創建為技術路線的焊點/縫建?？蚣?，進一步針對螺母邊焊的焊點直徑計算、焊點中心至邊線距離計算展開了參數自動計算和驗證問題研究。通過CATIA CAA二次開發技術，實現了汽車座椅骨架電阻焊工藝中的平板凸焊和螺母焊的參數化建模，提高了汽車座椅骨架零部件焊點設計效率，并為多類型焊點（點焊、弧焊等）管理系統開發奠定了基礎。
CATIA CAA object extension is the most important way of self-defined object creation and is also the difficulty of development. Based on analysis of processing parameters and restrains of resistance welding, a framework for welding spot modeling via the technical route of CAA user interface design, self-defined object, parameter validation and entity creation, is advanced. Furthermore, problems of parameter automatic computing and validation are studied through examples of spot diameter computation of nut side weld and distance computation between spot center and sideline. Finally, parametric modeling of plate projection weld and nut weld of resistance welding of resistance welding for vehicle seat framework (VSF) is realized by CATIA CAA redevelopment, which improves weld design efficiency of VSF parts and provides fundamental for multi-type welding (including spot welding, arc welding, etc.) management system development.