以前,我厂的内螺纹是用丝锥在车床上加工的。这种方法生产不太安全,生产率比较低。在现有条件下,要完成年产量为40～50万个的任务比较困难。我厂在大搞技术革新、技术革命运动中,革新了一种自动定位攻丝夹具,用它来制造内螺纹,提高了生产率,提高了质量,改变了我厂的生产面 In the past, my factory’s internal thread was tapped on a lathe. This method is less safe to produce and less productive. Under the existing conditions, it will be more difficult to complete the task of producing 40 to 500,000 annual output. I plant in the major technological innovation, technological revolution movement, the innovation of an automatic positioning tapping fixture, use it to create internal thread, improve productivity and improve the quality of my factory has changed the production side