空拔(无芯棒拔制)是一种重要的钢管冷拔方式,其目的是减小钢管直径,但在拔制过程中钢管壁厚也随之发生变化。因此,掌握空拔时壁厚变化的规律,对于制定冷拔工艺和提高成品管的壁厚精度,是十分重要的。到目前为止,对空拔时壁厚变化的试验研究多集中于碳素钢管在锥形模中的拔制;而国内普遍采用的弧形模空拔不锈钢管的壁厚变化则研究很少,没有可用预报的模型。结合生产实际情况,本文对此进行了试验研 Air stripping (without mandrel extraction) is an important method of cold drawing steel tubes, the purpose of which is to reduce the diameter of the steel tube, but the pipe wall thickness also changes during the drawing process. Therefore, grasping the rule of the wall thickness change at the time of air-drawing is very important for making the cold drawing process and improving the precision of the wall thickness of the finished tube. Up to now, the experimental research on the wall thickness variation at air-laying has focused on the drawing of carbon steel tube in the conical die. However, the research on the wall thickness variation of the curved die- No model available for forecasting. Combined with the actual production situation, this paper conducted a pilot study