Method and apparatus for forming intruded branch attachment structures in tubing
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United States of America Patent
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Jul 14, 1987
Grant Date -
N/A
app pub date -
Aug 15, 1986
filing date -
Aug 15, 1986
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Method and apparatus for forming intruded sleeves in extrudable metal tubing thereby to receive branch tubes which are brazed in place. The apparatus comprises a split mandrel and a punch which drives a punch head through the tube wall section and into a pocket in the upper section of the mandrel to form the intruded sleeve structure. Removal of the mandrel is accomplished by removing a lower section, dropping the upper section off of the intruded sleeves, and thereafter removing the upper section.
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