Metal deforming – Process – Tube making or reshaping
Patent
1981-09-14
1984-01-03
Larson, Lowell A.
Metal deforming
Process
Tube making or reshaping
228155, B21D 4102
Patent
active
044236182
ABSTRACT:
A method is described for manufacturing, shipping, and handling a process component of heat-exchanging, air-conditioning, and refrigerating circuits, such as a filter drier or an accumulator, so that the process component can be joined to fluid tubing of such circuits by field brazing, using phosphorus-bearing copper filler metal with little or no silver content to make the braze joints. The method finally comprises the steps of selecting the tubing used for the connectors with a diameter which is smaller than the diameter needed for the field brazing to the circuit tubing and then mechanically expanding the other end of the tubing from 2% to 20% to this field brazing diameter, whereby the tubing is work-hardened to a hardness of 45-50 F Scale Rockwell and is able to withstand damage from shipping and handling operations and thereby returns the critical tolerances needed by the field brazing. However, mechanical expansion is restricted to a maximum of 6% if it is desired to avoid an orange peel surface on the connector. Mechanical expansion is done by punching in one to four steps, each punch increasing the diameter of the tubing by 0.005 to 0.010 inch.
REFERENCES:
patent: 2174967 (1939-10-01), Cartwright
patent: 2197609 (1940-04-01), Cornell, Jr.
patent: 4049185 (1977-09-01), Nippert
Larson Lowell A.
Virginia Chemicals Inc.
LandOfFree
Rehardening of copper connectors does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Rehardening of copper connectors, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Rehardening of copper connectors will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1027639