全国先进刀具观摩推广队中南分队朱大仙同志,在郑州纺織机械厂加工铸铁滚筒时,经过多次试验,创造了一种大前角强力车刀。原来该厂在C 630车床上加工直径为230毫米、长2米多的铸铁滚筒时,采用刃倾角λ=5°、前角γ=5°、主偏角(?)=75°的YG8硬质合金车刀。切削用量:主轴转数n=48转/分;走刀量s=0.6毫米/转;切削深度t=8毫米。加工时由于产生崩裂切屑,热量集中在刀尖部分,刀具磨损很快,车 National advanced tool to observe the promotion team Zhongnan Detachment Comrade Zhu Da Xian, Zhengzhou Textile Machinery Factory in the processing of cast iron roller, after many tests, to create a powerful horn front lathe. The original factory in the C 630 lathe processing diameter of 230 mm, more than 2 meters long cast iron cylinder, the use of blade angle λ = 5 °, rake angle γ = 5 °, the main deflection angle (?) = 75 ° YG8 hard Carbide tool. Cutting amount: spindle speed n = 48 rev / min; take the amount of s = 0.6 mm / rev; cutting depth t = 8 mm. Machining due to cracked chips, heat concentrated in the tip portion, the tool wear quickly, the car