APPARATUS FOR PERFORMING A HYDROFORMING OPERATION

A hydroforming apparatus (10) is capable of deforming relatively large and thick-walled workpieces, yet is relatively small, simple, and inexpensive in construction and operation. The hydroforming apparatus includes an upper platen (20) and a lower platen (30) that are connected together by tie rods...

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Bibliographische Detailangaben
Hauptverfasser: JAMES C. LARKIN, RICHARD A. MARANDO, JOSEPH J. VASALANI, EDWARD DROST, JEFFREY P. DZIKI, ERIC M. SCHRACK
Format: Patent
Sprache:eng ; spa
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Zusammenfassung:A hydroforming apparatus (10) is capable of deforming relatively large and thick-walled workpieces, yet is relatively small, simple, and inexpensive in construction and operation. The hydroforming apparatus includes an upper platen (20) and a lower platen (30) that are connected together by tie rods (43) extending through respective compression tubes (40, 41). An upper die section (83) is supported on the upper platen (20), while a lower die section (84) is supported on the lower platen (30) for vertical movement relative to the upper die (83) section. The upper and lower die sections (83, 84) have respective recessed areas (83a, 84a) formed therein that define a hydroforming die cavity. When the lower die section (84) is moved to a lowered position, a workpiece (93) can be disposed in the recessed area formed therein.; Then, the lower die section (84) and the workpiece (93) are elevated by cylinders (72) such that the workpiece (93) is enclosed within the hydroforming cavity and mechanically deformed by the cooperated upper (83) and lower (84) die sections. A hydroforming support block (90) is then moved between the hydroforming die and the lower platen (30). A cylinder array containing a plurality of pistons (56) is next hydraulically actuated so as to securely clamp the hydroforming die between the cylinder array and the lower platen (30). While the cylinder array is actuated, pressurized fluid is supplied within the workpiece (93), causing it to deform into conformance with the hydroforming die cavity. Se proporciona un aparato de hidroconformación que es capaz de deformar piezas de trabajo relativamente grandes y de pared gruesa, y al mismo tiempo es relativamente pequeña, sencilla y barata en cuanto a su construcción y funcionamiento. El aparato de hidroconformación incluye una placa gruesa superior y una placa gruesa inferior que se conectan juntas por varillas de unión que se extienden a través de tubos de compresión respectivos. Una sección de troquel superior es soportada sobre la placa gruesa superior, mientras que una sección de troquel inferior es soportada sobre la placa gruesa inferior para movimiento vertical en relación a la sección de troquel superior. Las secciones superior e inferior de troquel tienen áreas rebajadas respectivas formadas en el mismo que definen una cavidad de troquel de hidroconformación. Cuando la sección de troquel inferior se mueve a una posición abatida, se puede colocar una pieza de trabajo en el área rebajada form