汽車鈑金焊接之夾治具精度分析與改善

隨著消費者對汽車外型及品質的日益要求，製造少量、車型多樣化為現今汽車中心廠努力的目標，新車型的生命週期愈來愈短，每個新車型的投產，均需要投入相對數量的焊接夾治具，進而對焊接夾治具設計、製造提出更高的要求品質。如何確保車身骨架尺寸在允許的誤差範圍內，是汽車中心廠提高市場競爭力的迫切要求，本研究的目的在探討汽車鈑金焊接之夾治具精度問題與改善，首先描述鈑金件組裝流程，其次說明鈑金件夾治具研發之重要工作，另外以鈑金件骨架組裝之孔位精度為例，具體說明現有問題並提出改善之策略，在骨架組裝之孔位精度探討上，提出增加夾治具X、Y方向副基準，並減少部份孔位的鈑金件之組裝流程，且將鈑金件的誤差範圍及鈑金件與鈑金件連接相對位置誤差範圍縮小，未來也希望能將本研究提出的不良要因分析及改善對策，應用在其他車身精度不良的部位，提高整體車身精度的良率。

關鍵字

車身骨架精度；定位基準；夾治具

並列摘要

With consumers’ requiring day by day for automobile appearance and quality, make a small amount, style diversification is the main goal for automobile factory now. The life cycle of the new style is shorter and shorter, the operation of each new style needs to invest relative quantity of welding jigs ,so put forward higher request quality in welding jigs of design and manufacture.As for market competitiveness of automobile factory, how to guarantee the precison of automobile body within allowed error range is urgent request.The purpose of this paper is to probe into the questions and improvement of jig’s precison, firstly describe assemble process of sheet materials ,secondly explain the important works of jig’s design and manufacture.Take a precision example of assembly hole,explain existing questions and bring up improved tactics, increase jig’s x , y direction of vice datums, reduce assembly process of sheet materials , and reduce the error range of sheet material and connection of sheet materials.In the future hopefutly,apply this paper of analysis and improved tactics to other inaccuracy sections of automobile bodies, improve the whole automobile body of accuracy rate.