Invention Grant
- Patent Title: Method of making a seamless hot-finished steel pipe, and device for carrying out the method
- Patent Title (中): 无缝热成型钢管的制造方法及其实施方法
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Application No.: US11577935Application Date: 2005-10-25
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Publication No.: US08166792B2Publication Date: 2012-05-01
- Inventor: Christoph Prasser , Rolf Kümmerling , Stefan Wiedenmaier , Pierre Lefebvre , Rupert Wieser , Robert Koppensteiner
- Applicant: Christoph Prasser , Rolf Kümmerling , Stefan Wiedenmaier , Pierre Lefebvre , Rupert Wieser , Robert Koppensteiner
- Applicant Address: DE Dusseldorf
- Assignee: V & M Deutschland GmbH
- Current Assignee: V & M Deutschland GmbH
- Current Assignee Address: DE Dusseldorf
- Agent Henry M. Feifreisen; Ursula B. Day
- Priority: DE102004052406 20041025; DE102005052178 20051024
- International Application: PCT/DE2005/001944 WO 20051025
- International Announcement: WO2006/045301 WO 20060504
- Main IPC: B21D17/02
- IPC: B21D17/02 ; B21B19/08
Abstract:
In a method of making a seamless hot-finished steel pipe a billet heated to a shaping temperature is pierced by a first shaping to a thick-walled hollow ingot which subsequently undergoes a radial forging process using an internal tool inserted in the hollow ingot and at least two forging jaws of a forging machine. The forging jaws act on the outer surface area of the hollow ingot, wherein the hollow ingot is turned and axially advanced in a clocked manner in the idle stroke phase of the forging jaws.
Public/Granted literature
- US20090044883A1 METHOD OF MAKING A SEAMLESS HOT-FINISHED STEEL PIPE, AND DEVICE FOR CARRYING OUT THE METHOD Public/Granted day:2009-02-19
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