A reciprocating die roll forming machine for forming a pattern such as a thread form on the outer surface of a cylindrical blank includes at least one set of reciprocating dies operating upon the blank which rotates in place. The machine includes a slide and bearing combination to support the dies belt driven by a servo-motor controlled by a central processing unit. Mechanism is provided to deliver and position a blank for engagement by the dies. In one form, the machine includes multiple die sets to produce multiple parts during one die reciprocation cycle. In another form, the machine employs separate drive mechanisms to independently drive each die of a set.

The present disclosure refers to a cold forming machine having two tool pairs that include a first cold forming rack and a second cold forming rack for cold forming of a workpiece respectively. The cold forming racks are movable parallel to a longitudinal direction during deformation. Each cold forming rack is attached to an assigned tool slide. Each tool slide can be moved and positioned in a longitudinal direction by means of an assigned drive unit. The drive unit is controllable by means of a control unit. The control slides can be individually positioned and moved in the longitudinal direction. Cold forming machine comprises at least three individually movable tool slides. For setup of cold forming machine, the tool slides and the cold forming racks of each tool pair attached thereon can be brought into a defined reference position in order to obtain the desired geometry of the profile on the deformed workpiece during the following deformation. The reference position can be corrected optionally during a series production of multiple workpieces of the same type, if this is necessary due to external influences, such as thermal influences, tool variations from a desired tool shape or tool wear.

A tool unit for a cold forming machine. The tool unit has a tool slide, which is linearly movable in a longitudinal direction. A carrier for a cold forming rack of the tool unit is provided on the tool slide. By means of an adjustment device, the carrier can be positioned in a working direction. For this purpose carrier can be preferably linearly moved in working direction. In working direction the cold forming rack is supported on the carrier and is clamped by means of a clamping device against the carrier. For this purpose the clamping device has at least one clamping body, which can be moved opposed to a clamping force (F) in working direction and abuts against the cold forming rack. The clamping device is preferably not directly connected with the carrier. The clamping force is particularly supported indirectly or directly on the tool slide by passing carrier.