陕西省宝鸡石油机械厂三车间加工法兰的批量很大,每个法兰有40多个Φ24毫米的孔。过去在摇臂钻床上钻孔时,钻头顶角为120°,转速为30转/分,走刀量为0.2毫米,加工效率不高。后来优选出合适的顶角125°,在转速及走刀量不变的情况下, Baoji Petroleum Machinery Factory in Shaanxi Province three large batch processing flange, each flange has more than 40 Φ24 mm holes. In the past when drilling on a radial drilling machine, the bit angle was 120 °, the rotation speed was 30 rpm, the cutting distance was 0.2 mm, and the machining efficiency was not high. Later, the best choice of a suitable top angle of 125 °, the speed and the amount of walking under the same circumstances,