Title:
METHOD FOR MANUFACTURING SEAMLESS STEEL PIPE AND ROLLING PLANT FOR EXECUTING SAID METHOD
Document Type and Number:
Japanese Patent JPS59178109
Kind Code:
A
Abstract:
A process and apparatus for the production of seamless tubing incorporating a push bench is provided in which ingots are pierced in the longitudinal direction by diagonal rolls over the stopper rods of a piercing mill to provide pierced ingots having one end with a wall thickening which protrudes outwardly or inwardly, then the wall thickening ends reshaped to provide a partially closed end and finally the pierced ingots are forced through the roll passes of a push bench by mandrel rods engaging the partially closed end so that the ingots are formed into a tube bloom.
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Inventors:
KARURUHANSU SHIYUTATSUTO
Application Number:
JP5021884A
Publication Date:
October 09, 1984
Filing Date:
March 17, 1984
Export Citation:
Assignee:
KOCKS TECHNIK
International Classes:
B21B19/02; B21B23/00; (IPC1-7): B21B19/02
Domestic Patent References:
| JPS5466365A | 1979-05-28 |
Attorney, Agent or Firm:
Ezaki Mitsuyoshi