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Continuous casting and inside rolling of round billets for seamless pipe. Final technical report

机译:圆坯连铸和内圆轧制无缝管。最终技术报告

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An invention is described which relates to a patented process and to a motor driven mandrel apparatus (Patent No. 4,546,816) which has the property to roll without slip (or friction) or to roll with controlled friction on the inside surface of a non rotating hollow round. Each point on the circumferential surface of the mandrel describes a hypocycloidal curve or a curve with a hypocycloidal characteristic during the operation of the mandrel.

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