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1. A process in which olefinic and carbocyclic petroleum products are converted to high-octane branched-chain alkanes in the presence of hydrogen and a catalyst under pressure and heat.
2. A manufacturing technique in which high-pressure hydraulic fluid is used to mold a sheet or tube of metal stock by forcing it against the surface of a die.

hy′dro·form′er n.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


1. (Chemistry) the catalytic reforming of petroleum to increase the proportion of aromatic and branched-chain hydrocarbons
2. (General Engineering) engineering a forming process in which a metal component is shaped by a metal punch forced against a die, consisting of a flexible bag containing a fluid
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
References in periodicals archive ?
22, 2019), "Method for Hydroforming a Container from a Preform," Denis Gillet (Discma AG, Zurich, Switzerland)
Across its five locations, the company specialises in all forming methods, including titanium sol-gel coating, metal bonding, specialty alloy welding, stretch forming, hydroforming, welding, brazing, processing, titanium SPF forming and aluminum and titanium chemical milling, among other capabilities.
Tube hydroforming process: A reference guide, Materials & Design 33: 328-339.
Designers can use tubes, metal spinning, hydroforming, deep draw die parts, or other 3D stamping to create the part shape.
By hydroforming the frame rails out of high-strength steel, the engineers were able to create comprehensively boxed sections for stiffness that had varying thickness along its length and width.
De Silva, "Free-bending--a new bending technique in the hydroforming process chain," Journal of Materials Processing Technology, vol.
There's a better way, and one that--once you've made the initial investment of $180 to $200 for a custom hydroforming die--costs you only time, and not much of that.
Lin, "Forming characteristic of sheet hydroforming under the influence of through-thickness normal stress," Journal of Materials Processing Technology, vol.