Apparatus for producing a corrugated tube

US4319471A · kind A · utility

Assignee

• Benteler-Werke AG · DE

Inventors

• Hubertus Benteler · Bielefeld, DE
• Rainer Hansen · Paderborn, DE
• Egon Olszewski · Paderborn, DE
• Ferdinand Wecker · Hövelhof, DE

Key dates

• Filing date: Jun 20, 1980
• Grant date: Mar 16, 1982
• Expiry date: Jun 20, 2000

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B21D26/043
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

Apparatus for forming a corrugated tube from a smooth walled starting tube comprises a pair of receiving mandrels aligned spaced from each other along a preferably vertical axis and movable toward and away from each other to be engaged in opposite end portions of a starting tube. The halves of split corrugation forming discs and the halves of an end member above the uppermost of the discs, coupled together for limited movement in axial direction, are respectively carried and guided for movement in axial direction by a pair of clamping jaws tiltable between an open position permitting to align a starting tube with the mandrels and a closed position closing the split discs and the split end member and fluid tightly clamping opposite end portions of the starting tube located about said mandrels respectively between one of the mandrels and the closed end member and between the other mandrel and the clamping jaws. A channel for introducing pressure fluid into the interior of the starting tube leads through the other mandrel, while a ventilating channel in which a ventilating valve is arranged serves to discharge air from the starting tube during introduction of pressure fluid thereinto.…