Stamping or nibbling machine having a workpiece feed operable in accordance with the weight and center of gravity of the workpiece

US4089244A · kind A · utility

Assignee

• TRUMPF Maschinen AG · CH

Inventors

• Eugen Herb · Ditzingen, DE
• Hubert Bitzel · Ditzingen, DE

Key dates

• Filing date: Aug 2, 1976
• Grant date: May 16, 1978
• Expiry date: Aug 2, 1996

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T83/531
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

A stamping or nibbling machine, comprises a workpiece support or means for engaging the workpiece at a spaced location from a punch which reciprocates upwardly and downwardly in respect to a die in order to effect the stamping or nibbling of the workpiece. The support is mounted on a transverse bar which is pivotable about a transverse guide and the guide is carried on a carriage which is pivotable about a longitudinal guide. The workpiece is fed by holding the bar and the carriage against pivotal movement and driving them in the respective longitudinal direction when the punch is lifted off the workpiece. The rate of this feed may be controlled in timed relationship to the movement of the punch so that the feed takes place when the punch is off the workpiece and in a speed of feed which is determined in accordance with the torque acting on the transverse bar and the carriage when they are released for pivotal movement and sensed by associated torque meters. In addition, the feeding control is also carried out in dependence upon the weight of the workpiece as measured, for example, by a measuring bolt at the location of the die. The stamping stroke of the punch can be released thro…