Method of producing copper clad aluminum wire |
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| 申请号 | US31491272 | 申请日 | 1972-12-14 | 公开(公告)号 | US3854193A | 公开(公告)日 | 1974-12-17 |
| 申请人 | FUJIKAWA CABLE WORKS LTD; | 发明人 | HIDERITA M; YAMAGUCHI T; TAKAYAMA T; | ||||
| 摘要 | A method of and apparatus for producing copper clad aluminum wire is provided in which a copper strip, while being formed into a cylindrical shape, is placed on the outer side of an aluminum core and the seam of the copper strip is then welded together to prepare a clad wire of the aluminum core and the copper strip, and thereafter the clad wire is subjected to a reducing process to produce a copper clad aluminum wire. The welding of the seam of the copper strip is effected in a closed atmosphere (shielding box) filled with an inert gas, and the diameter reducing operation is carried out through a die whose half-approach angle (i.e., a half approach angle) is between 35* and 55* and at a temperature below 200*C to insure a complete metallurgical bonding between the copper sheath and the aluminum core. | ||||||
| 权利要求 | 1. A METHOD OF PRODUCING A COPPER CLAD ALUMINUM WIRE COMPRISING COVERING AN ALUMINUM CORE LONGITUDINALLY WITH A COPPER STRIP IN CYLINDRICAL FROM; FACING THE RESULTING SEAM OF SAID COPPER STRIP AND WELDING SAID SEAM TOGETHER IN A SHIELDED ATMOSPHERE COMPRISING AN INERT GAS AT A PRSSSURE GREATER THAN ATMOSPHERIC PRESSURE TO FORM A COPPER CLAD ALUMINUM WIRE, AND 2. A method according to claim 1, wherein said aluminum core consists of a soft aluminum core. 3. A method according to claim 1, wherein said aluminum core and said copper strip are each subjected to a surface cleaning treatment comprising removing soils such as oils and dirt on the surfaces of said metals and thereafter scrubbing and removing oxide films on the surfaces of said metals by brushing them off with a fine metal wire brush prior to so covering said aluminum core with said copper strip. 4. A method according to claim 1, wherein the seam of said copper strip is welded together in the presence of an inert gas selected from the group consisting of helium gas (He), argon gas (Ar), carbonic acid gas (CO2), nitrogen gas (N2), and a mixture thereof and at a pressure higher than 0.1 mm. of water. 5. A method of claim 1 wherein the diameter is so reduced in the presence of a lubricant. |
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