Our cold pilger mills use a special cold forming process which is both cost-efficient and indispensable for many applications. It involves a large number of forming steps to improve roundness, stress homogeneity, and surface roughness of the tubes. You can even apply our cold pilger mills to produce difficult materials beyond the capabilities of other processes.
Cold pilger mill

Process
Cold pilgering process
Multi-step forming guarantees high-quality seamless tubesCold pilgering is a rolling process for metal tubes that reduces diameters and wall thicknesses.
The Process
Located inside the tube is a stationary mandrel (1) which tapers in the rolling direction. This is attached to a long mandrel bar (2) which is secured in, and rotated by, a thrust block. Two dies (3) "form" the tubular stock in the same way that a rolling pin rolls out pastry. These two dies are mounted in a reciprocating saddle (4). Their drive pinions mesh with two stationary racks. That's how the dies rotate back and forth in synchronization with the reciprocating saddle. The saddle, in turn, is moved back and forth by a crank drive in the same way as a piston in the engine of a motor car.




Application




Main use
Technology
Cold pilger mill equipment
SMS group cold pilger mills achieve large reductions in both diameter and wall thickness. Simultaneously, they significantly reduce eccentricity due to the homogenization of the material flow during forming. This creates the required microstructures in the material.
Electrical and automation systems
Service
Contact

Michael Wilms
SMS group GmbH
Head of Seamless Tube Plants
Ohlerkirchweg 66
41069 Mönchengladbach
Germany
Phone
: +49 2161 350 1842

Norbert Tessarek
SMS group GmbH
Service Cold pilger technology
Ohlerkirchweg 66
41069 Mönchengladbach
Germany
Phone
: +49 2161 350 1584
Fax
: +49 2161 350 1865

Stefan Schmidt
SMS group GmbH
Vice President Electrics/Automation Long Products
Ohlerkirchweg 66
41069 Mönchengladbach
Germany
Phone
: +49 2161 350-2944
Fax
: +492161 350-2488