由于轧制螺纹具有切削螺纹所不可比拟的高生产率及质量好的优点,所以在大批量标准螺纹生产中,轧制方法取得了主导地位。但在煤炭、地质、冶金等地质钻探工作中,所需的大量钻杆圆锥螺纹,目前仍用切削方法制造。近几年来,不少单位开始了圆锥钻杆螺纹轧丝机的研究及试制工作,但都未取得良好效果。 Due to the high productivity and good quality unmatched by the cutting thread, the rolling method has gained the dominance in high volume standard thread production. However, in the geological drilling of coal, geology, metallurgy and other geological drilling, a large number of drill pipe taper thread, is still used cutting method. In recent years, many units started the research and trial production of the cone drill pipe thread rolling machine, but none of them achieved good results.