Feintool International Holding Ag

Feintool Industrial Property Ag

Feintool International Management Ag

Feintool Intellectual Property Ag

Willi Grimm

Shin Takahashi

Shin Takhashi

A method and tool for producing workpieces with small corner radii in relation to the cutting thickness and with greatly reduced draw-in by precision cutting in a precision cutting tool includes clamping the workpieces between two tool parts consisting of a respective top and bottom cutting dies and of a top and a bottom cutting punch. The workpiece is machined in a one-stage arrangement in at least two successive cutting sequences in different cutting directions with the following partial steps: (A) cutting out a semifinished product, matched to the workpiece geometry, in a first cutting operation in a vertical working direction with slight draw-in, and (B) finish cutting of the semifinished product, produced in step (A), in at least one further cutting operation in a working direction opposed to step (A), wherein the draw-in of partial step (A) is filled again at least in the corner region.

Method and tool for precision cutting

The incomplete compound die cut along the circumference of the precision blanking is performed with a specially shaped cutting edge of cutting punch () and/or the die plate () in such a way that the precision blanking () remains initially connected by a material bonding to at leas one partial connecting part on the material strip (), either on the upper or lower plane at a level relative to the material strip. It is then moved together with the material strip in the running direction of the strip to a subsequent removal stage (ejector), in which the precision blanking and the material strip are separated from each other perpendicular to the running direction of the material strip towards the bottom by breaking out the connecting part without a vertical shear force component and without being pressed back, wherein the removed precision blanking () is discharged through a discharge chute () in the die plate.

Method and device for producing precision blankings from a material strip

A method for the production of stamped part in a tool, particularly a fine cutting tool, by means of at least one stamp which is used to press the stamped part from a strip of material. According to the inventive method, the stamped part is moved from the material strip to a discharge element after it has been pressed from the material strip.

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Kallnach, Switzerland

Willi Grimm