Feintool Intellectual Property Ag

Feintool International Holding Ag

Zf Friedrichshafen Ag

Ulrich Schlatter

Matthias List

Tobias Miller

Julia Klein

Martin Meyer

Marco Soldati

Andreas Marti

Pavel Hora

Gilbert Fuerer

Gilbert FÜRER

Parking detent pawls are known which are suitable for securely holding a vehicle in a parked state. The aim of the invention is to provide a detent pawl for a parking lock which is characterized by a high degree of operational reliability. For this purpose, a method is proposed for producing a detent pawl with a latching section for engaging into a locking toothing, a support section for rotatably supporting the detent pawl about a rotational axis, and a locking section for resting against a locking bolt which can be moved along the detent pawl, having the following steps: providing a detent pawl blank; providing a shaping tool with a shaping contour, said shaping contour having a load section and a guide section; and shaping the detent pawl blank in a shaping direction by means of the shaping tool, wherein a depression for receiving the locking bolt is produced on the locking section, the load section defines a load region of the depression for supporting the locking bolt in a locking position, and the guide section defines a guide region of the depression for guiding the locking bolt during an actuation movement.

Method for producing a detent pawl

A bipolar plate having a surface structure for a flow field, inner forms such as holes and slots in the plate, and a reference geometry on the outer form thereof is produced by means of a hydraulic fine-blanking press having an at least three-stage progressive die, in the first stage of which a blank is cut partially free from a metal-foil strip, subsequently in a second stage the surface structure is formed in the connected blank via compression-forming using a forming force of at least 2500 to 3500 kN, the inner form, the slots and the reference geometry are formed by way of cutting in, and on, the blank and then, in a third stage, cutting of the outer contour and removal of the finished blank in the form of the bipolar plate are carried out successively in the stroke cycle.

Method and apparatus to manufacture metallic bipolar plates

A method and a device for the production of a stamping with an enlarged functional surface, for example, fine blanking a workpiece out of a flat strip, wherein the flat strip is clamped between an upper part including a shearing punch, a pressure pad for the shearing punch, a V-shaped projection arranged on the pressure pad and an ejector which is pressed into the flat strip, and a lower part including a cutting die and an ejector. Edge rollover is avoided by preforming, before cutting begins, a negative with regard to the cutting direction with a preforming element in the direction opposite to the cutting direction that corresponds to the expected edge rollover into the cutting die with regard to size and geometry at cutting, generating a material volume at the side of the rollover in a mirror-inverted form. During cutting, the preformed area is supported by the preforming element.

Method and device for the production of a stamping with enlarged functional surface

A method and device for production of stampings with an almost smooth cutting and enlarged functional surface, especially fine blanking and/or forming a workpiece out of a flat strip, wherein flat strip is clamped between an upper part consisting of a shearing punch, a pressure pad, a V-shaped projection and an ejector arranged on the pressure pad, and a lower part consisting of cutting die, ejector and an inner form stamp. By adjusting the state of stress in the cutting zone to a position oriented compressive stress by movement slightly retarded with regard to movement of the shearing punch additionally pressing in material in a direction almost perpendicular to the cutting direction by a tool element acting with controlled force depending on the part geometry and thickness of the workpiece parallel to the cutting line between shearing punch and cutting die, tears at cutting and reduced rollover are achieved.

Method and device for the production of a stamping with almost smooth cutting and enlarged functional surface

A method and device for lubricating tool and workpiece at cutting and forming, especially fine blanking of a workpiece with 5 mm or more thickness and with complex part geometry from a flat strip lubricates a tool and workpiece at cutting and forming, so that fine blanking of thicker parts is reproducible, with high quality. Extended the edge life of the tools is achieved by lubricating the active surfaces without the provided lubricating film breaking off. One quantity of cutting oil is accumulated in a micro-surface structure of a functional surface of shearing punch and cutting die and evenly distributed on the functional surfaces as quasi-stationary cutting oil film by cooperation of functional surfaces moving past each other when the tool is closed, and another quantity of accumulated cutting oil, via the respective effective gaps, is provided to the active surfaces of shearing punch and workpiece in the forming zone.

Method and device for lubricating tool and workpiece at cutting

A device and a method for fine blanking and forming a workpiece out of a flat strip includes. a cutting plate formed as a disc-shaped transfer part, with several cutting openings adapted to the effective elements which take up and clamp a cut out a blank to transport the blank from one machining stage to the next. The transfer part is turnable with regard to the effective elements of the upper part around a virtual axis parallel to the machining direction in the center of the transfer part, turnable perpendicular to it after a lift over the effective elements of the lower part, and the cutting openings in the transfer part are arranged on a common base circle, the radius of which coincides with the distance of the machining stage to the axis, and that the machining stages of the upper part are arranged on the base circle at fixed distances to each other, wherein the machining stages in the transfer part are allocated at least two machining elements diametrically opposed at the circumference, fixed in the pressure pad of the upper part, arranged parallel to the axis locking bolts and several arranged diametrically opposed at the circumference locking openings in the transfer part for adjusting, fixing and lining up the effective elements to each other.

Method and device for fine blanking and forming a workpiece

Disclosed is a method for producing a thin-walled part (), especially a pipe section. According to said method, the wall () of the part () is drawn out from a strip () of material, an inner contour () is cut out, the wall is stretched to size, and an outer contour is cut out of the strip () of material.

Growing community of inventors

Lyss, Switzerland

Ulrich Schlatter