This article introduces a means of nc program about rough cut of helicoid base on helix-milling. The means can improve efficiency of cutting, reduce the cutting abrasion, depress the operating costs.
基于螺旋线数控铣削的螺旋曲面粗加工的方法可大大提高加工效率，减少刀具磨损，降低加工成本。
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Milling system : cracker, muller, milling machine, conveyor, hoist , material house, fluidized bed furnace, helix mixing blade, ripe power house, static dust catcher and shaking motor.
This paper simplifies the gear change calculation and machine adjustment in machining equiangular helix conical milling cutter with non-circular gear method.