| 摘要 |
A method for removing waste from a die-cast metal workpiece includes: 1) removing run and overflow via a first cutting apparatus (10); and 2) removing burring via a second cutting apparatus (100). The first cutting apparatus includes a first upper die (12), a first lower die (40), and a plurality of pairs of aligned first punches (22). Each first punch includes a wedge-shaped first machining section (23). The second cutting apparatus includes a second upper die (102), a second lower die (140), and a plurality of second punches (122). Each second punch includes a stepped second machining section (123). The second machining section includes a plurality of progressively stepped machining portions (124). A topmost machining portion is the largest, and a bottommost machining portion is the smallest. Thus the second machining section can cut burring from the workpiece stepwisedly.
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