A method for forming a stop flange on a self-tapping screw includes locating a shank of a self-tapping screw between two threading dies, fixing one of the two threading dies and moving the other one of the two threading dies to work the shank, the external thread forming section of each of the threading dies performing threading to form an external thread on the shank, inserting the insert and the recessed corner of each of the threading dies into a top of the external thread to form a groove in the shank, and the insert of each of the threading dies gradually squeezing downward an extruded portion that is formed during formation of the groove to form a stop flange on the shank. Thus, the shank is integrally formed with the stop flange, to stop an excessive movement of the external thread.

A method for manufacturing a multi-functional fastener includes a preparing operation, a forming operation and a threading operation. The preparing operation prepares a metal blank cut from a length of a metal material. The forming operation is executed so that the metal blank forms a shank, a head, and a drilling portion connected to the shank. The threading operation is executed to roll the metal blank with a thread rolling set having two opposite rolling plates. Each rolling plate has slit grooves and convex units arranged in alternation. Each of the convex units has protrusions each situated between two adjacent slit grooves, which allows the threading operation to equip the shank of the metal blank with thread convolutions, slots formed between the thread convolutions for helping quick removal of chips, and main ribs formed between any two adjacent slots for increasing cutting efficiency.

The invention relates to a method for producing a connecting element comprising at least two ball-like sections, wherein two ball-like sections are directly adjacent to each other, or wherein two ball-like sections are connected to each other by means of a connecting section, wherein the rolling of a single-piece blank, which is cylindrical at least in sections, between at least two rolling tools and the shaping of the at least two ball-like sections and optionally of the connecting section during the rolling are provided.

The invention relates to a method for producing a connecting element comprising at least two ball-like sections, wherein two ball-like sections are directly adjacent to each other, or wherein two ball-like sections are connected to each other by means of a connecting section, wherein the rolling of a single-piece blank, which is cylindrical at least in sections, between at least two rolling tools and the shaping of the at least two ball-like sections and optionally of the connecting section during the rolling are provided.

The present invention is a die positioning system for use in positioning mobile or fixed dies. The system includes a pair of key bars, a pair of key disc inserts, a set of key discs, and a set of disc backers. The key bars and key discs serve to offset manufacturing dies or die holders. Using key bars and/or key discs from different pairs of key bars and/or sets of key discs also allows for precise angulation of the dies or die holders. The key discs are held in place between the die and die holder, or between the die holder and key base, by the key disc inserts and angled (if feasible) by the disc backers. The key bars, located between the key disc inserts and the die or die holder allow additional offset of the die or die holder. The solid, stacked configuration of the key bars and key discs prevents the die or die holder from gradually or suddenly losing its positioning.

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.

The present invention is a die positioning system for use in positioning mobile or fixed dies. The system includes a pair of key bars, a pair of key disc inserts, a set of key discs, and a set of disc backers. The key bars and key discs serve to offset manufacturing dies or die holders. Using key bars and/or key discs from different pairs of key bars and/or sets of key discs also allows for precise angulation of the dies or die holders. The key discs are held in place between the die and die holder, or between the die holder and key base, by the key disc inserts and angled (if feasible) by the disc backers. The key bars, located between the key disc inserts and the die or die holder allow additional offset of the die or die holder. The solid, stacked configuration of the key bars and key discs prevents the die or die holder from gradually or suddenly losing its positioning.

A rolling tool (5) has a basic body (6) for fastening the rolling tool (5) in a rolling machine (1) and a profiled part (7) for the shaping treatment of a workpiece (2) to be rolled. The basic body (6) and the profiled part (7) are of multi-piece design. The basic body (6) and the profiled part (7), in their interconnected position, are mounted movably relative to one another in a plane perpendicular to the rolling direction (23). The basic body (6) of the rolling tool (5) can also be part of the rolling machine (1).

A rolling tool (5) has a basic body (6) for fastening the rolling tool (5) in a rolling machine (1) and a profiled part (7) for the shaping treatment of a workpiece (2) to be rolled. The basic body (6) and the profiled part (7) are of multi-piece design. The basic body (6) and the profiled part (7), in their interconnected position, are mounted movably relative to one another in a plane perpendicular to the rolling direction (23). The basic body (6) of the rolling tool (5) can also be part of the rolling machine (1).

A cold rolling machine and method for producing a profile on a workpiece. The cold rolling machine having two constructed tool units. Each tool unit has at least one rolling rod extending in the longitudinal direction, a tool slide, a slide drive device, a pivoting carrier and a pivot drive. The at least one rolling rod is fastened to the tool slide and can be moved in the longitudinal direction by the slide drive device. The pivoting carrier can be pivoted about a pivot axis extending in the longitudinal direction by a pivot drive. The tool slide is arranged on the pivoting carrier. An angle of inclination can thereby be set between the two rolling rods, which angle of inclination can have, for example, a value of 0 degrees to 2.0 degrees or to 0.2 degrees. Conical profiles can thereby be produced in the workpiece.