| 摘要 |
PURPOSE: A stretch bending apparatus is provided to control strength and springback by implementing a stretching operation together with bending molding which pulls both ends of a large high strength molding beam on a bending mold which is formed with a curvature molding plane that has a fixed curvature, thereby increasing dimension precision of a molding curvature. CONSTITUTION: A stretch bending apparatus comprises a bending die(20), a mold unit(30), a pair of rotary units(40), and a stretching unit(50). The mold unit is composed of a turn table(31), multiple bending molds(35R1,35R2,35R3), a driven gear, a motor, and a driving gear. The bending molds are formed with different specifications from one another, and installed on the turn table. The driven gear is installed on one side of the lower part of a rotary shaft. The driving gear is installed on a shaft of the motor, and engaged with the driven gear.
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