無縫鋼管壁厚偏心率的測量分析及降低方法

Measurement Analysis and Method for Reduction of Wall Eccentricity of Seamless Steel Tube

摘要: 運用模型對無縫鋼管壁厚偏心率的形成及構成進行分析；闡述了一種降低偏心率誤差的方法——穿孔時偏心高頻率旋轉技術，并將該方法用于監(jiān)測生產(chǎn)過程。分析認為：無縫鋼管的偏心率由來自管坯方面的偏心率和來自穿孔頂頭的偏心率構成；穿孔時采用偏心高頻率旋轉技術，降低了偏心率的產(chǎn)生振幅，使軋件沿周向產(chǎn)生金屬流動，從而達到減小偏心率的目的。

Abstract: Analyzed via relevant model are development and formation of wall eccentricity of the seamless steel tube. And also elaborated is a method for reducing error of such eccentricity，i.e.，the in-piercing process eccentric high frequency spinning technique. This method is used to monitor the manufacturing process. The analysis reveals that the said pipe eccentricity is originated by the bloom eccentricity and the piercer plug eccentricity. The superposition of these two factors lead to the local maximum value. Owing to using the said eccentric HF spinning technique during piercing operation，the vibration amplitude that causes the eccentricity is reduced to get circumferential metal flow of the workpiece so as to lessen the wall eccentricity of the pipe.