Abstract: A device for pre-tensioning a machine frame has a tie rod including a first and a further rod head for placement on the machine frame and a tension element for absorbing tensile forces between the rod heads. The tension element extends along a tension distance of the tie rod. At least one of the two rod heads includes a device for reversing the direction for the tension element. In further aspects, a machine frame and a pressing or drawing device are provided.

Abstract: A flange is formed on a workpiece by first mounting the workpiece in an inner holder shiftable along about a main axis and securing the inner holder against rotation about the main axis. A roller is rotated about the main axis adjacent the inner holder. Then the inner holder and workpiece are displaced axially to press the workpiece axially against the roller and deform the workpiece and form a flange thereon. This is done without heating the workpiece, that is in a cold-forming operation.

Abstract: A flange is formed on a workpiece by first mounting the workpiece in an inner holder shiftable along about a main axis and securing the inner holder against rotation about the main axis. A roller is rotated about the main axis adjacent the inner holder. Then the inner holder and workpiece are displaced axially to press the workpiece axially against the roller and deform the workpiece and form a flange thereon. This is done without heating the workpiece, that is in a cold-forming operation.

Abstract: Teeth are ring rolled in a closed die formed between upper and lower clamping elements in a starting workpiece that is a pretreated blank whose shape outside a region to be deformed by upper and lower profiled tools already corresponds generally to a desired finished shape. Prior to rolling the region to be deformed is heated and the upper profiled tool together with the upper synchronously rotating clamping element form a closed cavity around the heated region to be deformed of the workpiece with the upper tool angled relative to the workpiece. The tools and elements are rotated while engaging the workpiece and deformation takes place between the rotating tools. The angled upper tool is advanced along its symmetry line into the workpiece as the workpiece is deformed. The upper clamping element is axially retracted opposite to the upper tool and away from the workpiece during the rolling process along the symmetry line of the upper profiled tool as the workpiece is deformed.