| 摘要 |
PROBLEM TO BE SOLVED: To provide a bending device with simple structure for a long product, which can bend tubes, bars and hoops or the like with unsymmetrical cross sections. SOLUTION: In the bending device for the long product with a bending head and a material feeding device, the bending head 2 is comprised of a base board 7 with a guide pipe 6 in its center which has a guide hole 5a to guide the long product 1 through it, a movable board 9 with a die 8 in its center to apply bending force on the long product 1 which is sent forward from the guide pipe 6, and 6 extensible arms 12 consisting of hydraulic cylinders 10 to connect the base board 7 with the movable board 9, and universal joints at both ends of the cylinders. This is a parallel link mechanism enabling translational motions of 3 degrees of freedom and rotational motions of 3 degrees of freedom, totally 6 degrees of freedom by extending and contracting the extensible arms 12 to set up position (distance, deviation) and inclination of the movable board 9 to the base board 7.
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