| 摘要 |
PROBLEM TO BE SOLVED: To prevent the copper or the copper alloy to be manufactured by a continuous extrusion from deteriorating its quality by mechanically machining a surface layer part with a depth of a specific dimension or over from the surface of the copper or the copper alloy stock, and extruding continuously the copper or the copper alloy stock after working by comform method. SOLUTION: By refining the copper stock by SCR method, and by rolling it continuously, a copper rough drawn wire, for instance, 12 mm or 10 mm in diameter, is manufactured. While moving the copper rough drawn wire with its surface cleaned in the longitudinal direction, the copper rough drawn wire is ground in the direction orthogonally crossing the longitudinal direction of the copper rough drawn wire by a planetary brush which rotates and revolves. At this time, the pushing-in quantity of the planetary brush to the copper rough drawn wire is adjusted so that the machining depth of the copper rough drawn wire becomes 20μm or over from the surface of the wire. Next, the continuous extrusion of the cleaned copper rough drawn wire is performed to a rectangular copper wire with a square sectional shape whose length of one side is, for instance, 5 mm by the comform method.
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