Plug for hot pipe making
AssigneeNippon Steel & Sumitomo Metal Corporation
InventorsKouji Yamane, Kazuhiro Shimoda, Tomio Yamakawa, Yuji Inoue
Life of this patent
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Abstract
A plug for hot pipe making includes a plurality of plug pieces which is attachable to and detachable from one another, and a connection member which connects the plug pieces by a magnetic force. One of the plug pieces connected to each other includes a column-shaped portion which extends in an axis direction of the plug for hot pipe making, and the other includes a joining hole which extends in the axis direction of the plug for hot pipe making and into which the column-shaped portion is inserted. The connection member is a permanent magnet which is attached to at least one of the column-shaped portion and the joining hole.
Claims14
A plug for hot pipe making which is used in hot pipe making of a seamless pipe, the plug comprising:
- a pair of plug pieces which is attachable to and detachable from one another;
- and
- a connection member which connects the plug pieces,
- wherein one of the plug pieces includes a column-shaped portion which extends in a direction of an axis of the plug for hot pipe making, and the other of the plug pieces includes a joining hole which extends in the direction of the axis of the plug for hot pipe making and into which the column-shaped portion is inserted, and
- wherein the connection member is a permanent magnet which is attached to at least one of the column-shaped portion and the joining hole.
Dependencies are inferred from the claim text.