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对于易起内皱的回转体零件，常使用环形拉深筋。本文根据此类零件的变形特点，在试验研究基础上，对拉深筋的阻力构成，筋的结构及位置等进行了机理分析，并结合应用提出了思考问题的途径。
Ring-shaped drawbead is often used for swivel body parts that are prone to wrinkling. Based on the experimental study, this paper analyzes the structure of the resistance of the drawbead, the structure and the position of the tendons, and puts forward the ways to think about the problems.