Mannesmann Aktiengesellschaft

Klaus-Peter Schirmag

Wilhelm Nickel

Rolf Kuemmerling

Jurgen Boos

Wilhelm Sebastian

Achim Homersen

Manfred Mueller

A pierced hollow rolled by obliquely positioned conical or barrel-shaped rolls, is held against excessive ovality by driven guide sheaves or disks acting in combination with guide bars downstream for controlling the rate of radial widening of the hollow. Oblique positions of the axes of the disks permits them to be of larger diameter.

Guide structure for pierced hollows

A mandrel rod with or without rolled tubes thereon is held by four guide structures, two arranged above and two below with respect to the axis of rolling, and each being arranged on a lever, these levers are arranged in pairs to both sides of the rolling axis, and they are particularly interconnected and connected to a common drive to permit common radial retraction of the guide structure; these guide structures have basically three different positions, one of full retraction permitting a mandrel rod with rolled tubes thereon to be removed by lifting while simultaneously a fresh mandrel rod is placed into the rolling axis from below; in a second position of the guide structures they engage a mandrel rod in the rolling axis, and in the third position they form-fittingly engage a hollow on the mandrel rod in the rolling axis.

Holding and guiding a mandrel rod in rolled stock in and adjacent to a

A traction device for buffering tubes including a reversibly driven sprocket and two guide members, each member being pivotably adjustable about a horizontal axis to change its orientation for orienting the chain in different directions vis-a-vis the sprocket wheel.

Growing community of inventors

Ratingen, Germany

Klaus-Peter Schirmag