| 摘要 |
PURPOSE: A device for measuring drawbead opening force is provided to measure drawbead opening force in various temperature ranges and drawn angles, thereby obtaining opening force data per drawn angle and temperature condition. CONSTITUTION: A device for measuring drawbead opening force(10) comprises a molding unit(100), a holding pressure unit(200), a drawing out unit(300), and an opening powder output unit. The molding unit comprises a fixed mold in which a female-bead is formed, and a movable mold in which male-bead is formed. The holding pressure unit comprises a load cell, a pressure mean, and an elastic member, offers blank holding force to measuring object inserted between the fixed mod and the movable mold. The specimen draw the specimen from upper side of the molding unit. the opening powder output unit outputs drawbead opening power from measured data of load cell.
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