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参照样品,经过改进和自行设计,我矿初步试制成功四柱、五柱两种型号的柱齿钎头,在二次爆破凿岩中代替原用的φ40毫米一字形合金片钎头。当工作风压在5公斤/厘米~2以上时,柱齿钎头的穿孔速度比一字形钎头快,岩渣呈片状,重复破碎少,操作工人爱用;五柱齿钎头纯穿孔速度在我矿矽卡岩、花岗岩(f=14～16)的条件下为20～30厘米/分,在浙江建德铜
With reference to the samples, after improvement and self-design, our mine trial trial succeeded in producing four-column and five-column two types of columnar bit heads, replacing the original φ40 mm in-line alloy bit heads in secondary blasting drilling. When the working pressure is 5 kg / cm ~ 2 or more, the perforation speed of the columnar bit is faster than that of the shape of the bit, and the flake is in the form of flake, less repeated crushing, and the operating worker loves to use it. Speed in mine ore skarn, granite (f = 14 ~ 16) under the conditions of 20 to 30 cm / min, Zhejiang Jiande Copper