Cold forming technology for high-quality seamless pipes

The cold pilger process is a rolling process that is suitable for a variety of materials, such as stainless steel, low alloy steel, zirconium alloys, copper and titanium alloys; production is completed through a special cold rolling process, which makes it stand out among many steel pipe processing processes. This process achieves the tightest outer diameter and wall thickness tolerances while reducing the diameter and wall thickness. Cold rolled pipes can be used in the medical, chemical, aviation, food and automotive industries, and can also be used in oil special pipes (OCTG), pure gas applications, refrigerators and heat exchangers (Inconel® and Incoloy®), etc.

Cold Pilger Mill

Multi-step forming technology for high-quality seamless steel tubes

The cold pilger process is a rolling process in which the diameter and wall thickness of a metal tube are reduced. The process uses multiple forming steps to improve the roundness, stress, uniformity and surface roughness of the tube.
Inside the tube is a fixed mandrel that tapers in the rolling direction. The mandrel is attached to a long mandrel rod that is fixed and rotated by a mandrel chuck. Two rollers "process" the tubular material in the same way that a rolling pin rolls a dough. The two rollers are mounted on a reciprocating frame, and their drive gears mesh with two fixed racks; this allows the rollers to rotate back and forth in sync with the reciprocating frame. The frame is driven back and forth by a crank drive, just like a piston in a car engine.

Our cold pilger mills are also suitable for materials that cannot be processed or are difficult to process by other processes (such as cold drawing).