FIELD: process engineering.
SUBSTANCE: invention relates to pipe rolling. Proposed method comprises piercing. Mandrel is rigidly fixed at spinning rod, a mandrel bar. Rough tube front end is locked by second mandrel at exit from working zone. Said second mandrel is arranged at aforesaid bar to feature two degrees of freedom, spinning and sliding to locating stop.
EFFECT: higher efficiency, lower input of costly metal and costs.
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| Title | Year | Author | Number |
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