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美国West Coast航空和航天公司解决了一个深孔钻削问题。他们加工一个液压缸零件,材料为4340合金钢锻件,需要钻一个孔径为1(1/2)英寸(38.1mm),钻深为6英寸(152.4mm)的孔,过去使用扁钻钻削,用8分钟才钻通。在钻削过程中,使用直径1.375英寸的扁钻;进给量限制到0.04英寸/转,而钻到1(1/2)英寸(38.1mm)时,切屑往往堵塞。后来改为“喷吸钻削”法,钻削同样的孔时间减少到57秒;虽然主轴转数稍为降低了些,但进给量却是原来的3倍,因
West Coast Aeronautics and Astronautics Solves a Deep Hole Drilling Problem. They machined a cylinder part made of 4340 alloy steel forgings and needed to drill a hole of 1 in. (1/2) in. (38.1 mm) and a 6 in. (152.4 mm) With 8 minutes before drilling. During drilling, a diamond with a diameter of 1.375 inches was used; the feed was limited to 0.04 inches / revolution and the chips were clogged when drilling to 1 (1/2) inches (38.1 mm). Later changed to “spray suction drilling” method, drilling the same hole time reduced to 57 seconds; Although the spindle slightly reduced the number of revolutions, but the feed is 3 times the original because