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我厂半空心铆钉需要量较大,原来是用黄铜棒在专用车床上分二道工序车制的,先车外圆、钻孔、切断,再车头部球面,二人每班只能生产1000件左右,材料利用率仅48％。后改用紫铜线切断后在冲模上冲挤,产量和材料利用率虽有很大提高(每班可产5000件左右,材料利用率98％),但仍不能满足生产需要。以后我们在加工实心铆钉打头机上装了一付模具,用冷镦挤的方法来制造半空心铆钉,效果极好。半空心铆钉冷镦挤模具如图所
My factory semi-hollow heart rivets larger, turned out to be a brass rod in a special lathe in two processes car system, the first car outside the circle, drilling, cutting off, and then head spherical head, two classes can only Production of about 1000, material utilization rate of only 48%. After the switch to copper wire cut off after punching in the die, although the yield and material utilization has greatly improved (class can produce about 5000, material utilization 98%), but still can not meet the production needs. Later we are in the processing of solid riveting head machine mounted on a pair of molds, cold heading extrusion method to create semi-hollow rivets, the effect is excellent. Semi-hollow rivets cold heading extrusion die as shown