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一、对向凹模精冲的冲裁原理对向凹模精冲,系由带齿凹模2,平凹模5,上顶件器1和下顶件器4组成,如图1所示。冲裁时需在两凹模之间加上支撑力及冲裁力,上顶件器1上加顶出力。冲裁时,平凹模5由支撑力支撑(支撑力=1/3冲裁力),且下顶件器4低于平凹模5。当带齿凹模2继续下降时,齿楔入材料,同时平凹模5也略有下降。当带齿凹模2与平凹模5刃口之间距离为0.1毫米时,带齿凹模2的后平面与平凹模5上的限位块接触,带动平凹模5继续下降,使下顶件器4伸出平凹模外,将工件
First, the fine blanking die blanking principle to the die fine blanking, the Department of the dentate die 2, flat die 5, the top of the device 1 and the next top device 4, as shown in Figure 1 . Blanking need to add between the two die supporting force and blanking force, on the top of a device on the plus output. At the time of blanking, the flat die 5 is supported by the support force (support force = 1/3 punch force), and the lower head 4 is lower than the flat die 5. As the toothed die 2 continues to descend, the teeth wedge into the material while the undercut 5 is also slightly lowered. When the distance between the dentate die 2 and the flat die 5 edge is 0.1 mm, the rear plane of the toothed die 2 contacts the stop block on the flat die 5 to drive the flat die 5 to continue lowering Under the top piece 4 out of the flat concave die, the workpiece