Method and parts for making a tubular workpiece, in particular a built-up camshaft

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 9284858
APP PUB NO 20130305532A1
SERIAL NO

13880262

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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The invention relates to a method for producing a tubular structural part by means of hydroforming. An assigned end of a supporting tube (1) is inserted into an opening in an end piece (2) and then widened by a pressurized fluid being applied to it and is connected to the end piece (2) with a press fit. The opening (9) has a first portion (10a) with a first inner cross section, which is greater than the outer cross section of the assigned end of the supporting tube (1). According to the invention, the first portion (10a) is adjoined by a second portion (10b), in a step-shaped manner so as to form an edge (11). The inner cross section of the second portion (10b) is smaller than the outer cross section of the assigned end of the supporting tube (1). In the method according to the invention, the supporting tube (1) is first inserted with its corresponding end into the first portion (10a), before the edge (11) cuts into the material of the supporting tube (1) in a further pushing-in movement.

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Patent Owner(s)

Patent OwnerAddress
THYSSENKRUPP PRESTA TECCENTER AGWIRTSCHAFTSPARK 37 ESCHEN 9492

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Demuth, Rico Wiesa, DE 1 2
Gentzen, Jens Lichtenau, DE 1 2
Meusel, Juergen Dittmannsdorf, DE 15 47
Paul, Alexander Reichenbach, DE 10 34
Paul, Daniel Burkhardtsdorf, DE 19 102
Reichelt, Robert Frankenberg/Sachsen, DE 7 8
Schieck, Frank Lauter, DE 4 12

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