关键词: 钣金, 下料, 计算机辅助设计与制造

Abstract: A CAD/CAM integrated software system for unfolding and cutting sheet metals of multi-intersected ducts and pipes is introduced in terms of system construction and principle. The software system adopts a process-oriented computing model, which sufficiently considers the welded seam, sheet thickness, join angle and their influences to sheet metal manufacture process. By means of MDMI program frame and 3-dimensional modeling technology, the system supports total-process-design. Such a system not only can produce the engineering prints, baiting figures and 3-dimensional model of various sheet-metal fabrications, but also can generate the plan lists for preparation processes and NC programs for NC machining. Simulations of the NC machining and direct numerical control are accomplished with the system as well.

Key words: sheet metal, baiting, CAD/CAM