【摘要】 为了确定快速成型中树脂固化线条的理论模型,对扫描动作和固化过程进行了详细分析.由于明确了实际扫描动作是由匀速运动和非匀速运动所组成的,因此实际扫描的固化线条是非均匀一致的.根据树脂曝光理论,建立了固化线条的横向和纵向截面形状的数学模型,揭示出整个固化线条呈哑铃形,其横截面轮廓呈抛物线形.在x轴上的位移等于光斑直径时,树脂微元的曝光时间最长,固化深度最深.采用实际的固化线条对数学模型进行了对比验证,其结果表明固化线条基本与理论模型一致,这对于改善成型质量具有理论指导意义.更多还原

【Abstract】 To determine the theoretical model of curing resin line in rapid prototyping, the scanning motion and curing process are particularly analyzed. It is defined that the actual scanning motion is composed of uniform motion and non-uniform motion, thus the actual curing line appears variously. Based on the theory of resin exposure the mathematical models of transect shape and vertical section shape of the curing line are established. It is discovered that the entire line presents a dumbbell contour, and shows a parabola on the vertical section. When the displacement in x axis reaches to the diameter of the facula, the exposure time is allowed to be the longest and the curing depth the deepest to the resin micro-unit. The actual curing line is coincident with the model’s comparatively. The research is of theoretical significance to improve prototyping quality.更多还原