Formation Tool for a Punching Machine
a technology of punching machine and tool, which is applied in the direction of manufacturing tools, forging/hammering/pressing machines, metal-working apparatuses, etc., can solve the problems of processing scratches on the underside of sheet metal workpieces and risk of damage to the underside of workpieces
Inactive Publication Date: 2008-12-11
MATE PRECISION TOOLING
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- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Benefits of technology
"The present invention provides a formation tool for punching machines that allows for deformation processing of sheet metal workpieces without lifting them out of the punching stroke plane. The tool has a lifting device that can aid in lifting the lower mold insert from the level of the punching stroke plane before a deformation operation. The tool also has an upper edge of the stripper plate towards the bottom die disposed at the level of the punching stroke plane, which allows for a maximum capacity for a change in shape. The lifting device can be a tubular body that allows for the transportation of punched-out sheet metal parts. The tool also has a cylindrical protrusion that securely engages the piston and transmits the forces required during a punching operation. The technical effects of the invention include improved deformation processing of sheet metal workpieces, reduced punching waste, and increased variety of possible shapes."
Problems solved by technology
In the case of vulnerable surfaces, this can cause processing scratches on the underside of the sheet metal workpiece.
When the upper or top die tool is lifted again, springs then lift the sheet metal workpiece again and it is moved laterally, whereupon it is again shifted downward onto the punching stroke plane, so that once again there is a risk of damage to the underside of the workpiece.
Method used
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Embodiment Construction
[0022]In FIG. 1, a prior art formation tool 100 is used in punching machines of the TRUMPF® system for forming sheet metal workpieces 102. The formation tool comprises an upper or top die tool 104 and a lower or bottom die tool 106, which can each be inserted into respective mounts in a processing station. To that end, the top die tool 104 has a suitably shaped shaft 108, while the bottom die tool 106 has a contact face 110 and, with a cylindrical protrusion 112, engages a corresponding recess in the processing station.
[0023]The top die tool 104 has an upper mold insert 114, which is braced via a helical spring 116 on a top die body 118. A holding-down device 120 is also solidly joined to the top die body 118 and presses the sheet during a punching stroke against a stripper plate 122 of the bottom die tool. The stripper plate 122 is braced resiliently on a bottom die body 126 via helical springs 124, with which body a lower mold insert 128 is rigidly connected and cooperates with th...
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Abstract
A formation tool is used for deforming sheet metal on punching machines. The formation tool has an upper or top die tool and a lower or bottom die tool. Toward the top die, there is an upper mold insert movable relative to a holding-down device, and toward the bottom die, a lower mold insert movable relative to a stripper plate. The deformation of the metal sheet is effected upward with respect to a punching stroke plane. The formation tool has a lifting device for aiding in lifting the lower mold insert from an initial position which is at or below the punch stroke plane before a deforming operation, to a level above the punching stroke plane.
Description
FIELD OF THE INVENTION[0001]The present invention relates to a formation tool for use in a punching machine for sheet metal deformation and, in particular, to a formation tool which has an upper or top die tool and a lower or bottom die tool for use in a punching machine having a gripper system which transports the two tool parts for a single machining operation.BACKGROUND OF THE INVENTION[0002]Prior punching machines include revolver punches and TRUMPF® system punches. In revolver punches, the top die tools and bottom die tools are each received in a revolver-like tool holder. Unlike revolver punches, the TRUMPF® system has a gripper system which transports the two tool parts, each for one machining operation, and inserts them into a processing station. The TRUMPF® system can use both punching tools and formation tools. Formation tools can be used to produce reliefs, folds, eyelets, or other shapes in sheet metal workpieces.[0003]The sheet metal workpieces to be processed are moved...
Claims
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IPC IPC(8): B21D24/00B21J13/02B21J13/08B21D24/16
CPCB21D22/02
Inventor SCHNEIDER, ALBRECHT
Owner MATE PRECISION TOOLING