| 摘要 |
PURPOSE:To draw a phosphor copper brazing material continuously without breaking at an ordinary temp., by connecting a lead wire of the same diameter as the diameter of said material to the forward end of the brazing material, passing the material through plural dies at a low speed by way of a high viscosity lubricating oil and drawing and coiling the material at a low speed. CONSTITUTION:A brass blank wire 2 of 2m length and 3.5phi as a lead wire is welded by butt welding through a juncture 3 to a phosphor copper brazing blank material 1 of 6wt% P and the balance Cu and of 3.5phi. The connected wire is drawn out from a pulley 5 at an ordinary temp. and while the wire 2 is held gnawed with a chuck, a high viscosity lubricating oil is stuck on the surface thereof, and in this state, the wire is introduced into the 1st die 6a at 5mm./sec speed and is thus drawn, whereafter the drawn wire is wound twice on the 1st capstan 7a. This stage is repeated with the 2nd die 6b and the 2nd capstan 7b in the same way as mentioned above, and the phosphor copper brazing material of a desired wire diameter is produced with the 10th die 6j and the 10th capstan 7j. When the juncture 3 comes out from the die 6j thereafter, the wire speed thereof is increased, and the wire is taken up with a coiler 8, whereby the phosphor copper brazing wire of 0.5phi is obtd. |
