Method of lubricating a workpiece for hydroforming

An apparatus and method of applying a lubricating material to an outer surface of a workpiece. Initially, a workpiece is provided that is preferably formed from a closed channel structural member having a circular or box-shaped cross sectional shape. Lubricating material is applied to an outer surfa...

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Bibliographic Details
Main Authors MARANDO RICHARD A, DURAND ROBERT D, SCHRACK ERIC M
Format Patent
LanguageEnglish
Published 17.04.2007
Subjects
MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL
PERFORMING OPERATIONS
PUNCHING METAL
ROLLING OF METAL
TRANSPORTING
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Summary:An apparatus and method of applying a lubricating material to an outer surface of a workpiece. Initially, a workpiece is provided that is preferably formed from a closed channel structural member having a circular or box-shaped cross sectional shape. Lubricating material is applied to an outer surface of the workpiece. In a second step of the method, the workpiece may be heat treated. The workpiece is then heated to elevate the temperature of the workpiece so as to cause the lubricating material to dry substantially immediately on the workpiece, thereby providing a coating of lubricating material having a substantially uniform thickness. In a fourth step of the method, a deforming process is performed on the workpiece during the period of time following the heat treatment process, and after applying the lubricating material, in which the workpiece retains the full or partial softening characteristics.
Bibliography:Application Number: US20020334106