我车间大量生产的点火线圈外壳(如图1),在拉延后其口上不整齐,需要修边。过去修边是在专用切边机上进行的,但尺寸9.5~(+0.5)不易保证,切边处有毛刺,而影响装配,生产效率也低。后来改用冲模修边(图3)克服了上述缺点。为了适应模具修边的需要,必须将前一工序的工件做成喇叭口(见图2)。 I workshop mass ignition coil housing (Figure 1), after drawing its mouth irregular, need trimming. In the past trimming is carried out on a special trimming machine, but the size of 9.5 ~ (+0.5) is not easy to guarantee, there are burrs at the trimming, which affects the assembly, the production efficiency is low. Later, the use of die trimming (Figure 3) to overcome the above shortcomings. In order to meet the needs of trimming die, the workpiece must be made of the previous process flare (see Figure 2).