Method for bending tubes using split die
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United States of America Patent
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Feb 8, 1994
Grant Date -
N/A
app pub date -
May 10, 1993
filing date -
May 10, 1993
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Method and apparatus for bending metal tubes such as for furnace heat exchangers. After the bend die is rotated 180.degree. to make a bend, an upper section of the bend die is split from a lower section, and the upper section is then rotated approximately 90.degree.. In such manner, a portion of the upper section is displaced laterally to vacate a region directly above the lower section. Therefore, in moving the tube forwardly to a new location for a subsequent bend operation, a portion of a previous bend passes through the vacated region thereby enabling sequential bend angles that are less restricted than without rotating the upper section of the split die.
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