| 摘要 |
PROBLEM TO BE SOLVED: To provide a shearing working method and a shearing working apparatus of sheet metal raw material in which a sheet metal product can be efficiently worked by performing one time working process of shearing lines intersected with each other.SOLUTION: A shearing working apparatus performs shearing working of sheet metal raw material W by using a first shearing line, and a second shearing line and third shearing line intersected with the first shearing line. The first shearing line performs shearing working by means of a first cutting edge of a first lower die blade 21 and a movable edge 31a of a first upper die blade 31. The second shearing line and third shearing line perform the shearing working by means of a second cutting edge 22a, a third cutting edge 23a, and collaboration of a floating edge 24a and a second upper die blade 32. Parts corresponding to the floating edge 24a and the cutting edges 22a, 23a sides, of the second shearing line and third shearing line are subjected to shearing working by means of a precedent shearing edge 37 prior to the first shearing line. |
