US 4,083,390 A · Grooving of sheet material

Abstract

A machine for cutting grooves in workpieces, particularly in sheet form, having at least one fixed cutter, support means for supporting the workpiece against the cutter and means for moving the workpiece relative to the cutter and support means. The cutter has a cutting edge defining the shape of groove to be cut and is arranged to slice through the workpiece to produce a groove leaving a constant thickness of material between the bottom of the groove and the other side of the workpiece. The forces tending to lift the workpiece from its support due to the action on the cutter of material removed thereby are overcome and a resultant force operating to press the workpiece on to its support is produced by arranging, either singly or in combination, that A. the cutter has a cutting edge substantially contained in a plane which extends forwardly in the direction of relative movement of the cutter and upwardly of the surface of the workpiece, B. the cutter has a bevel face which faces the workpiece and extend rearwardly from the cutting edge at a negative angle of clearance to the workpiece.

Claims10

Dependent claims

In a groove cutting machine of the type having

groove cutter means for cutting a groove in a workpiece
means for holding the cutter means,
3. support means for supporting a workpiece against the cutter means during the cutting of a groove in the workpiece by the cutter means, and,
4. drive means for causing relative motion between the workpiece and the cutter means to effect the cutting of a groove in the workpiece by the cutter means,
the improvement for cutting a groove in one face of the workpiece whereby a constant thickness of material remains between the bottom of the groove and the other face of the workpiece wherein
i. the cutter means comprises at least one cutter whose cutting edged are located in a common plane, the shape of those cutting edges in that common plane defining the cross-section of the groove to be cut
ii. the means for holding the cutter keeps the common plane of those cutting edges in a substantially constant angular position relative to the workpiece the common plane being inclined fowardly in the direction of movement of the cutter relative to the workpiece and that common plane extends upwardly from the bottom of the groove made by the cutting edges.

4 more elements

Dependencies are inferred from the claim text.

Grooving of sheet material

Life of this patent

Grooving of sheet material

Life of this patent

Abstract

Claims10