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一般制作非环形铁芯的硅钢片,大多数用冷冲模来完成的,而且采用复合冲模居多。它可将其外形与制件上的孔同时冲裁成形(见图1)。但由于硅钢片材料薄(0.25～0.45mm),加以模具的刃口磨削后,模具的剩磁不易退尽。因此,冲制时,冲孔的余料容易贴在顶料杆的端面上,不易脱落,圆孔余料容易卡在凹模内,常常为了要剔出圆孔的余料不得不中断连续冲裁。这样就大大影响了生产效率。
The general production of non-circular iron core silicon steel, most of the use of cold die to complete, and the use of complex die most. It can punch the shape of the hole with the workpiece at the same time (see Figure 1). However, due to thin silicon steel sheet (0.25 ~ 0.45mm), to be the edge of the mold grinding, the mold remanence is not easy to retire. Therefore, when punching, punching the excess material easily affixed to the end of the top material rod, easy to fall off, more than a hole in the hole easily stuck in the die, often in order to be removed from the hole of the hole had to interrupt continuous punch Cut This will greatly affect the production efficiency.