Mechanical hydroforming with improved lubrication

B - Operations – Transporting – 21 – D

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

B21D 9/15 (2006.01) B21D 26/02 (2006.01) C10M 101/02 (2006.01) C10M 105/52 (2006.01) C10M 109/02 (2006.01)

Patent

CA 2343523

A process of mechanical hydroforming, in which a hollow tube is caused to expand against the interior surface of a die that surrounds the tube by hydraulic pressure applied to a liquid that fills the interior of the tube, is improved by coating the part of the exterior surface of the tube that comes into contact with the die surface against which it expands with a wax that is solid at normal room temperature but can be maintained fully melted and in contact with air, without showing any visible evidence of decomposition, at a temperature that is at least 75 ~C. Preferably, the wax is applied to the surface to be hydroformed by spraying from melt onto the surface while the latter is maintained above the melt temperature of the wax. Shortly after the wax has been thus applied to the surface, the wax is cooled until it solidifies. Most preferably, the wax is an "oxidized hydrocarbon" wax that is about 95 % hydrocarbon and 5 % straight chain carboxylic acids and contains a wide variety of molecular weights of both hydrocarbons and carboxylic acids.

L'invention concerne un procédé d'hydroformage mécanique dans lequel un tube creux est amené à s'élargir à l'encontre de la surface intérieure d'une matrice entourant le tube, par suite de la pression hydraulique appliquée sur un liquide qui remplit l'intérieur du tube. Ce procédé est amélioré en revêtant la partie de la surface extérieure du tube venant en contact avec la surface de la matrice contre laquelle il s'élargit, d'une cire solide à température ambiante normale, mais pouvant être maintenue complètement fondue, en contact avec l'air, sans présenter de signes visibles de décomposition, à une température d'au moins 75 ·C. De préférence, la cire est appliquée sur la surface à hydroformer par pulvérisation du produit fondu sur la surface, cette dernière étant maintenue au-dessus de la température de fusion de la cire. Immédiatement après l'application de la cire sur la surface, la cire est refroidie jusqu'à ce qu'elle se solidifie. De préférence, la cire est une cire d'"hydrocarbure oxydé" composé d'environ 95 % d'hydrocarbure et 5 % d'acides carboxyliques à chaîne droite, avec grande variété de poids moléculaires d'hydrocarbures et d'acides carboxyliques.

LandOfFree

Say what you really think

Search LandOfFree.com for Canadian inventors and patents. Rate them and share your experience with other people.

Rating

Mechanical hydroforming with improved lubrication does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Mechanical hydroforming with improved lubrication, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Mechanical hydroforming with improved lubrication will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFCA-PAI-O-1863849

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.