電子鎖外殼引伸成形與模具設計

本文以電子鎖外殼，使用SUS304不鏽鋼為產品開發之材料，研究探討其引伸成形製程技術與模具設計。電子鎖外殼板厚為2.5mm，屬於厚板深引伸，探討其深引伸成形之可能性，考量成形過程中胚料之引伸成形性，規畫出多工程道次成形，並最終實際成形試驗。試驗SUS304材質引伸成形後，為了尺寸更加穩定將進行回火加工，並且觀察回火與未回火加工之後續製程的尺寸變化。設計工程道次共規畫為沖胚、引伸、回火、切緣、抽直及整形等六道次，依上述工程設計與製作模具。結果顯示，引伸道次設計上，壓料力及凸緣邊預留量間接影響引伸成形是否破裂；引伸成形後，經回火加工能獲得比較穩定的尺寸；最後成品之尺寸均符合圖面設計公差範圍。

關鍵字

引伸成形；模具設計；電子鎖； SUS304

並列摘要

This study developed electronic lock covers by using SUS304 stainless material and investigated the drawing processes and die design for such covers. The cover of the electronic locks was 2.5 mm in thickness, necessitating a thick-plate-deep-drawing process. In exploring the drawability of the material, this study referred to domestic and foreign studies on drawing and die manufacturing. Additionally, this study considered the drawability of the blank in the drawing process as well as the planning of a multipass drawing and engineering process before proceeding to the actual forming tests. After the SUS304 material was tested in drawing, this study further compared the changes in the sizes of tempered and untampered materials. The design engineering comprised six passes: stamping, drawing, tempering, edge cutting, straightening, and shaping, which were used as the basis for designing and manufacturing the dies. The results revealed that in the design for the drawing process, the binder force and reserve amount of the flange indirectly influenced whether the products fractured during drawing. In addition, the size of the products tempered after drawing became relatively stable.