Patent
Apparatus for hydroforming a vehicle manifold
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TLDR
A hydroforming process and apparatus for manufacturing components of a vehicle exhaust or intake manifold is described in this paper. But this process is not suitable for vehicular applications, as it requires a large number of dies to form a compound bend in the pressurized tube.Abstract:
A hydroforming process and apparatus for manufacturing components of a vehicle exhaust or intake manifold. The hydroforming process is utilized to form a tubular member to the desired configuration for use in a manifold. The tubular member is loaded into a hydroform press and filled with a suitable liquid. The liquid within the tube is pressurized in order to maintain a predetermined internal fluid pressure which prevents collapse and crimping of the tube during forming. The hydroform press includes two sets of dies to form a compound bend in the pressurized tube. Upper and lower dies close on the tube first to bend the tube in a vertical plane. Horizontal dies are wedged inwardly spreading the first die set and bending the tube in a horizontal plane. As a result, a compound configuration may be placed on the tube making it suitable for use in a vehicle manifold.read more
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