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中文摘要：
目前大多数熔敷成形技术的成形方向是固定不变的，使得具有倾斜面或悬臂结构的零部件成形时必须借助支撑结构。支撑结构的熔敷与去除造成材料浪费，降低成形效率。针对机器人GMAW焊接熔敷成形系统多自由度特点，根据零件几何特征将零件几何模型分解为不同的特征体，使得各特征体能够被赋予不同的成形方向、起始熔敷成形面及成形顺序，从而消除或减少支撑结构。
英文摘要：
Forming orientation is exclusive in most deposition-based rapid prototyping, which makes support structures must be employed when depositing parts with slopeing surface or overhanging structure. Support structures waste deposition material and decrease forming efficiency. Considering the multi-degree character of robotic weld deposition-based rapid prototyping, the geometric model of part is decomposed into sub-body according to part＇s geometric character. Each sub-body can by endowed with different forming orientation initial deposition surface and deposition sequence, so that support structure can be eliminated or decreased.
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