Machining planar workpieces

Patent metadata

Field	Value
Publication number	US-11241727-B2
Application number	US-201916363167-A
Country	US
Kind code	B2
Filing date	Mar 25, 2019
Priority date	Sep 26, 2016
Publication date	Feb 8, 2022
Grant date	Feb 8, 2022

Abstract

A machine for machining, such as cutting and/or forming, planar workpieces has an upper tool and a lower tool that are movable toward each other to machine a workpiece arranged therebetween. The upper tool includes at least one cutting tool having at least one cutting edge and a clamping shaft. The lower tool includes a main body having a support surface for the workpiece. The support surface has an opening associated with an inner counter cutting edge. The lower tool has a positioning axis and at least one outer counter cutting edge provided outside of the opening and associated with the support surface. The outer counter cutting edge is aligned with an outer face of the support surface. A distance of the outer counter cutting edge from the position axis and a distance of the inner counter cutting edge from the position axis deviate from each other.

First claim

What is claimed is:

1. A planar workpiece processing device, comprising:
an upper tool comprising at least one cutting tool with at least one cutting edge and a clamping shaft, the upper tool having an upper stroke axis; and
a lower tool 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, the lower tool having a lower stroke axis,
wherein the lower tool comprises an inner counter cutting edge oriented and arranged towards the opening,
wherein the lower tool comprises at least one outer counter cutting edge provided outside of the opening and associated with the rest surface,
wherein one of the at least one outer counter cutting edge is oriented towards an outer side of the rest surface bordering the rest surface,
wherein the inner counter cutting edge and the 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 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 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,
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
wherein the upper tool and the lower tool are movable towards one another for machining the workpiece arranged therebetween 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.

2. The planar workpiece processing device of claim 1 , wherein a size of the opening in the main body of the lower tool is at least 1.5 times of an end face of the at least one cutting tool of the upper tool.

3. The planar workpiece processing device of claim 1 , wherein the inner counter cutting edge and the one of the at least one outer counter cutting edge of the lower tool are positioned opposite one another relative to the rest surface and are oriented to one another without an angular offset or offset at an angle to one another relative to the rest surface.

4. The planar workpiece processing device of claim 1 , wherein the inner counter cutting edge and the one of the at least one outer counter cutting edge of the lower tool are formed at least as a cutting plate arranged detachably on the main body of the lower tool.

5. The planar workpiece processing device of claim 1 , wherein a punch face is connected to at least one of the inner counter cutting edge or the one of the at least one outer counter cutting edge opposite to the rest surface and directed downwardly.

6. The planar workpiece processing device of claim 1 , wherein at least one guard strip is provided on at least one side of the lower tool adjacent to the at least one outer counter cutting edge.

7. The planar workpiece processing device of claim 1 , wherein the at least one outer counter cutting edge includes one or more secondary cutting edges are attached detachably to the main body of the lower tool, and
wherein the one or more secondary cutting edges are oriented projecting outwardly with respect to the main body and are provided on an adapter plate attached detachably to the main body.

8. The planar workpiece processing device of claim 1 , wherein the lower stroke axis of the lower tool lies inside the opening in the main body, and
wherein the cutting tool of the upper tool is positioned relative to the upper stroke axis.

9. The planar workpiece processing device of claim 1 , wherein a discharge surface is associated with the at least one outer counter cutting edge of the lower tool, and wherein the discharge surface is attached detachably to the main body of the lower tool.

10. The planar workpiece processing device of claim 1 , wherein the at least one outer counter cutting edge bordering the rest surface of the lower tool is rounded or chamfered.

11. The planar workpiece processing device of claim 1 , wherein the rest surface has an approach ramp extending up to the one of the at least one outer counter cutting edge.

12. The planar workpiece processing device of claim 1 , wherein the upper tool is formed as a multiple tool including a plurality of cutting tools, and
wherein the cutting tools in the multiple tool are activatable individually for workpiece machining by an activation device.

13. 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
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Assignees

• Trumpf Werkzeugmaschinen Gmbh Co Kg

Inventors

• Ockenfuss Simon
• Hank Rainer
• Klinkhammer Marc
• Schindewolf Leonard
• Kappes Jens
• Traenklein Dennis
• Tatarczyk Alexander
• Neupert Joerg
• Bitto Dominik
• Maatz Markus
• Jakisch Christian
• Wilhelm Markus

Classifications

• B26F2001/4427

  combining cutting and forming operations · CPC title

• B26F1/40

  using a press, e.g. of the ram type (presses in general B30B) · CPC title

• B21D28/34

  Perforating tools; Die holders · CPC title

• B21D28/02

  Punching blanks or articles with or without obtaining scrap (cutting nails or pins from strips or sheet material B21G3/26); Notching · CPC title

• B26F1/44

  Cutters therefor; Dies therefor · CPC title