Through theoretical analysis, probability revisal and experimental test, the limit drawing ratio of a tapered cup drawn by cylinder convex punch and tapered concave die is determined in tis paper.
通过理论分析，概率修正和实验验证，确定出利用柱形凸模、锥形凹模一次拉深锥形件的极限拉深比。
The analysis and calculation indicate that the image of a square for a wedge prism is in the shape of bell with a convex side rather than with a concave side.
分析和计算都表明，正方形物体经光楔所成的像是凸侧面的钟形而不是凹侧面的钟形。
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