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Inventor: Yanagimoto; Samon
Address: Kitakyushu, JA
No. of patents: 2
Patents:
| Patent Number |
Title Of Patent |
Date Issued |
| 4052874 |
Method of producing tubular body in a press roll piercing mill |
October 11, 1977 |
| A method of producing a cylindrical metallic tubular body in a press roll piercing mill. The method involves applying a pressing force to a polygonal metal billet in the axial direction thereof while guiding the billet by means of a guide during its advance, rolling corner portions of |
| 4006618 |
Method of producing seamless steel tube |
February 8, 1977 |
| In a method of producing seamless steel tube from billet having a square or rectangular cross-section by the step of piercing a workpiece and rolling steps following the piercing step, each of such steps being conducted with a plug held by a mandrel toward the center of cross section of |
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