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随着机器制造工业的飞速发展,不仅要求钢管材质具有好的机械和物理化学性能,而且要求钢管具有非常精确的几何尺寸。用工业化方法生产的高精度冷轧管制作的轴承内外套圈在增加各种机械和部件运行可靠性及使用寿命的同时,还可以大大提高各种机床的作业率,并且大大改善金属材料利用率.苏联南方钢管厂(T3)生产轴承管的工艺特点是采用φ140自动轧管机组成立式液压机穿孔后再减径的方法生产热轧管坯,用热加工机械装备生产的管坯,虽然直径精度较为满意,但壁厚公差达不到要求。例如,根据测定结果,热轧管坯的横向壁厚不均度大部分为15～25％,特别是在压力机
With the rapid development of the machine building industry, not only does the pipe material have good mechanical and physicochemical properties, but also the pipe has very precise geometrical dimensions. The inner and outer bearing rings made of high-precision cold-rolled tubes produced by the industrialized method can greatly improve the operation rate of various machine tools and greatly improve the utilization rate of metal materials while increasing the operational reliability and service life of various machines and components. The process characteristic of bearing tubes produced by the Southern Steelworks (T3) in the Soviet Union is to use the φ140 automatic pipe mill to form a vertical hydraulic machine and then reduce the diameter to produce the hot-rolled steel pipe billet, which is produced by the hot-working mechanical equipment. Although the diameter precision More satisfied, but the wall thickness tolerance can not meet the requirements. For example, according to the measurement results, the lateral wall thickness unevenness of the hot-rolled steel tube is mostly 15 to 25%, especially in the press