本发明涉及一种金属轧制管的芯棒改进方法，具体地说是一种行星轧机用空芯棒。
The invention relates to an improvement method of a core rod of a metal rolled tube, in particular to a hollow core rod used for a planetary rolling mill.
轧件不转是行星斜轧机轧制的重要工艺要求。
The shell not-rotation is the important technical requirement for planetary cross-mill.
轧件不转是行星斜轧机轧制的重要工艺要求。
The shell not-rotation is the important technical requirement for planetary cross-mill.
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