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US 9,545,932 B1Granted
Cold-formed tank head for railroad tank car
AssigneeSamuel, Son & Co., Limited
InventorsDaniel P. Stancescu, Richard M. Balaz, Emad Fakhry Habib Assaad
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AssigneeSamuel, Son & Co., Limited
InventorsDaniel P. Stancescu, Richard M. Balaz, Emad Fakhry Habib Assaad
Estimating the term…
A new method of manufacturing a railroad car tank head having the steps of providing a circular blank of steel plate material, cold-forming the circular blank to form an intermediate ellipsoidal dish, cold-forming a peripheral flange region of the intermediate ellipsoidal dish to form a flanged ellipsoidal dish, and heat treating the flanged ellipsoidal dish. The heat treatment may be either a thermal stress relieving heat treatment or a normalizing heat treatment. The two cold-forming steps may be carried out at room temperature. The present invention provides a method of making a railroad car tank head that is more efficient than prior methods, avoids the challenges of hot-forming and single-stage cold-forming, is easily adaptable to different tank head diameters using the same forming equipment, and yields a railroad car tank head that meets safety standards.
A method of manufacturing a railroad car tank head comprising the steps of:
A method of manufacturing a railroad car tank head comprising the steps of:
Dependencies are inferred from the claim text.