Metal deforming – By application of fluent medium – or energy field – With actuated tool engaging work
Patent
1997-05-15
1999-12-28
Jones, David
Metal deforming
By application of fluent medium, or energy field
With actuated tool engaging work
72 57, 72 62, B21D 915, B21D 2602
Patent
active
060065672
ABSTRACT:
A apparatus and method for forming a complex-shaped frame member from a blank tube having opposed ends is provided. The blank tube is placed in a first cavity on a lower die. An upper die is lowered from an open position to a close proximity to the lower die. The upper die has a second cavity aligned with the first cavity. A pair of sealing units seal the opposing ends of the blank tube, and a fluid delivery means for communicates a fluid into the tube. A fluid control means pressurizes the fluid in the tube to a low pressure level. A position determining means determines a distance separating the upper die in the closed position from said lower die in the lowered position. A lower die lifting means raises the lower die from the lowered position the determined distance to the lifted position. The fluid control means then pressurizes the fluid in the tube to expand the tube to conform to the forming cavity.
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Brown James H.
Webb Gary A.
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