Multi-stage tube hydroforming process

A method for hydroforming a tubular blank (10) comprises the steps of at least partially closing the die portions (14, 16) of a die (12) about a tubular blank (10), introducing a hydraulic fluid (22) into the tubular blank (10) at a first pressure, substantially closing the die portions (14, 16) abo...

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Bibliographische Detailangaben
Hauptverfasser:	CHRISTIANSON SCOTT, MASON MURRAY
Format:	Patent
Sprache:	eng
Schlagworte:	MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL PERFORMING OPERATIONS PUNCHING METAL TRANSPORTING WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS ORPROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL
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Beschreibung
Zusammenfassung:	A method for hydroforming a tubular blank (10) comprises the steps of at least partially closing the die portions (14, 16) of a die (12) about a tubular blank (10), introducing a hydraulic fluid (22) into the tubular blank (10) at a first pressure, substantially closing the die portions (14, 16) about the tubular blank (10), partially opening the die portions (14, 16) while at least initially maintaining the pressure of the hydraulic fluid (22), and substantially closing the die portions (14, 16) at least a second time.