| 摘要 |
The purpose is to make it possible to easily perform thin-wall machining such as pocket-forming on the curved inner-surface side of a curved, thin, plate-shaped workpiece, using a simple and inexpensive configuration, and to improve productivity and reduce the cost of machined workpieces. A vacuum-suction-type support jig (1) is equipped with a curved, rigid suction surface (15), projection/retraction holes (16, (suction units)) formed in each section of the suction surface (15), and a vacuum pump (12, (negative-pressure-applying means)) for applying negative pressure to the projection/retraction holes (16), wherein it is possible to vacuum-suction a curved, plate-shaped workpiece (W) to the suction surface (15), and perform thin-wall machining on the curved inner-surface side of the plate-shaped workpiece (W). Before being vacuum-suctioned to the suction surface (15), the plate-shaped workpiece (W) is first suctioned to and held by a plurality of suction tubes (21) projecting from the projection/retraction holes (16), then pulled to the suction surface (15) by retraction of the suction tubes (21) into the projection/retraction holes (16), and then vacuum-suctioned to the suction surface (15) by application of the negative pressure to the projection/retraction holes (16). |
