Machining planar workpieces

A planar workpiece processing machine, comprising:

• an upper tool comprising:
• at least one cutting tool with at least one cutting edge, and
• a clamping shaft,
• wherein the upper tool is movable along an upper stroke axis by a first stroke drive device in a first direction of a workpiece to be machined and in a second direction, positionable along an upper positioning axis running perpendicular to the upper stroke axis, and movable by a first motor drive assembly with an upper traversing movement along the upper positioning axis;
• a lower tool oriented towards the upper tool and comprising:
• a main body having a rest surface for a workpiece, the lower tool having an opening in the main body to eject a workpiece part formed from the workpiece downwardly through the opening after the workpiece part is separated from the workpiece by the cutting tool,
• an inner counter cutting edge oriented and arranged towards the opening, and
• at least one outer counter cutting edge provided outside of the opening and associated with the rest surface and oriented towards an outer side of the rest surface bordering the rest surface,
• wherein the lower tool is movable along a lower stroke axis by a second stroke drive device in the first direction of the upper tool and in the second direction, positionable along a lower positioning axis oriented perpendicular to the upper stroke axis of the upper tool, and movable by a second motor drive assembly with a lower traversing movement along the lower positioning axis,
• wherein the inner counter cutting edge and one of the at least one outer counter cutting edge are positioned on a same side of the main body with respect to the lower stroke axis,
• wherein the inner counter cutting edge is formed as an inner open cutting edge that extends over a partial area along the opening and is different from an opening edge of the opening, and the one of the at least one outer counter cutting edge is formed as an outer open cutting edge that extends over a partial area along an outside of the rest surface on the main body of the lower tool, and
• wherein a distance of the one of the at least one outer counter cutting edge from the lower stroke axis and a distance of the inner counter cutting edge from the lower stroke axis deviate from one another;
• wherein the inner counter cutting edge is formed on a projection protruding into the opening, wherein the projection extends radially inwardly with respect to the opening edge of the opening and an edge bordering the opening relative to the rest surface, and
• a controller configured to control the first and second motor drive assemblies for moving the upper tool and the lower tool, respectively,
• wherein the upper traversing movement of the upper tool along the upper positioning axis and the lower traversing movement of the lower tool along the lower positioning axis each are actuatable independently of one another, and
• wherein the upper tool and the lower tool are movable towards one another for machining the workpiece arranged therebetween, and wherein machining the workpiece comprises at least one of cutting the workpiece with the at least one cutting edge of the at least one cutting tool of the upper tool and at least one of the inner counter cutting edge or the at least one outer counter cutting edge of the lower tool or forming the workpiece.