| 摘要 |
PROBLEM TO BE SOLVED: To provide an O-press die which attains reduction in the production cost of a UOE tube of an intermediate outside diameter and enlargement of a range of produceable diameter of the UOE tube under the conventional expansion condition without degrading work efficiency, in production of the UOE tube of an intermediate outside diameter in a production line of the UOE tube of which the produceable diameter is determined for each size of the O-press die step by step, and to provide a method for producing the UOE tube by using the O-press die. SOLUTION: The O-press die for the UOE tube contains upper and lower dies 2A, 2B which are arranged on the upper and lower sides, wherein inner surfaces of the upper and lower dies have a shape formed by cutting a part of upper and lower halves of a transverse oval shape so that the inner surfaces of the upper and lower dies are transverse oval in shape when the gap Go between the upper and lower dies is set to be a predetermined value, and so that the inner surfaces of the upper and lower dies are connected to each other without any step when the upper and lower dies are tightly attached to each other. The UOE tube is produced by using the die. COPYRIGHT: (C)2011,JPO&INPIT
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