旋转精锻是一种以高效、高精度和低费用生产具有复杂外形的管件或轴类件的方法,包括旋转型锻和径向锻造两种工艺。达两种精锻工艺在美国和其他一些国家均已成功地用于冶锻小口径枪管。目前,美国大批量生产的猎枪和步枪枪管一般 Swing forging is a method of producing tubes or shafts of complex shapes with high efficiency, precision and low cost, including rotary swaging and radial forging. Up to two kinds of precision forging technology in the United States and other countries have been successfully used for smelting small caliber barrels. Currently, shotguns and rifle barrels are mass-produced in the United States in general