Method of and tool for fine-cutting pieces with small edge radius and strongly reduced depth in a single step arrangement

Abstract

The invention relates to a method and a 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 (3) of a precision cutting machine, in which method the workpiece is clamped between two tool parts consisting of a respective top and bottom cutting die and of a top (10) and a bottom cutting punch (20), and the cutting is effected in interaction with the top (10) and the bottom cutting punch (20). The object of the invention is to improve a method and a tool for producing workpieces in such a way that the precision cutting can also be applied to parts with small corner radii and sharp-edged corners at a greater sheet thickness without restricting the functioning of the parts and while simultaneously ensuring economical advantages. This object is achieved by the workpiece being machined in a one-stage arrangement in at least two successive cutting sequences (A, B) 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, B) finish cutting of the semifinished product, produced according to 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.

Description

technical field [0001] The invention relates to a method for producing a workpiece in a fine blanking die of a fine blanking machine with a small fillet radius and a greatly reduced shrinkage compared to the blanking thickness, wherein the workpiece is clamped in Between the two mold parts, the mold part is composed of an upper punching die and a lower punching die, and an upper punching punch and a lower punching punch, and the punching passes through the upper punching die It is realized by the synergy with the lower punching punch. [0002] The present invention also relates to a mold for precision blanking workpieces with small fillet radii and greatly reduced shrinkage compared to punched thickness from stamped strips, slabs, coils, etc., said mold having two clamps The half body of the mold for pressing the stamping strip, slab, coil, etc., the half body of the mold is composed of at least one blanking die and one punching die respectively. Background technique [00...

AI Technical Summary

Problems solved by technology

The undercut is thus dependent on the material thickness and material quality, so that it can only be controlled to a limited extent and generally limits the length of the component, for example due to the absence of sharp edges in the toothed part or due to the resulting change in the functional length of the component. Function

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