Method for forming patterns of brazing alloy
US4157154A · kind A · utility
14Cited by
4References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 21, 1977 |
| Grant date | Jun 5, 1979 |
| Priority date | — |
| Expiry date | Nov 21, 1997 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K1/20
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
Brazing alloy on detailed aluminum parts is formed in an exact pattern of the joints to be brazed. An aluminum sheet having brazing alloy coated on one or both sides (e.g., a brazing sheet) is plated with electroless nickel and electrolytic copper which are etched by use of a photoresist mask into a mask which outlines the pattern. The brazing alloy coating is then chemically milled to form the exact pattern of the joints. Parts are then assembled and dip brazed to form the completed brazed unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.