Gripper element for a punch or a die of a punching machine
AssigneeRainer S.r.l.
InventorEugenio Perazzolo
Life of this patent
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Abstract
The machine includes two turrets carrying a plurality of punch-die pairs, a magazine for these pairs, and a device for changing over the pairs. This device is formed from at least one changeover arm having two gripper elements, each comprising a pair of jaws operable by a common actuator. The two jaws are provided with a through-pin and are each engagable in a pair of channels, perpendicular to each other, carried by a flange of the punch or the die. When the gripper element moves parallel to the axis of the punch or the die, a first channel of the pair is disposed axially and has a quadrangular section, while the other channel is tangential and has a triangular section.
Claims16
A gripper element for a punch or a die of a punching machine provided with a changeover device (32) for a punch-die pair (8, 9) including at least a pair of jaws (117, 131) operable by a common actuator (127, 182, 142, 143):
- wherein said jaws (117, 131) are moveable so as to engage in two corresponding pairs of channels (122, 123, 136, 137) of a flange (89, 90) of said punch (8) or said die (9);
- wherein said two pairs of channels (122, 123;
- 136, 137) are diametrically opposed on each of said flanges (89, 90), said channels (122, 123;
- 136, 137) of each said pair being perpendicular to each other;
- wherein a first of said channels (122, 136) of each said pair has a rectangular cross section, a second of said channels (123, 137) having a triangular cross section;
- wherein said jaws (117, 131) have a rectangular cross section in order to engage with said first of said channels (122, 136);
- wherein each of said jaws (117, 131) carries a pin (124, 138) projecting from said rectangular cross section of said jaws (117, 131) in opposite directions for engaging said second of said channels (123, 137;
- wherein said pin (124, 138) is disposed adjacent an end (121) 135) of said jaws (117, 131), said end (121, 135) being chamfered;
- and
- wherein said laws (117, 131) are are pivoted on two parallel pins (118, 134) of a crosspiece (119, 133) for pivoting by an actuator (128, 129;
- 142, 143) disposed between two other pins (127, 141) of said jaws (117, 131).
A gripper element for a punch or a die of a punching machine provided with a changeover device (32) for a punch-die pair (8, 9) including at least a pair of jaws (117, 131) operable by a common actuator (127, 182, 142, 143):
- wherein said jaws (117, 131) are moveable so as to engage in two corresponding pairs of channels (122, 123, 136, 137) of a flange (89, 90) of said punch (8) or said die (9);
- wherein said two pairs of channels (122, 123;
- 136, 137) are diametrically opposed on each of said flanges (89, 90), said channels (122, 123;
- 136, 137) of each said pair being perpendicular to each other;
- wherein a first of said channels (122, 136) of each said pair has a rectangular cross section, a second of said channels (123, 137) having a triangular cross section;
- wherein said jaws (117, 131) have a rectangular cross section in order to engage with said first of said channels (122, 136);
- wherein each of said jaws (117, 131) carries a pin (124, 138) projecting from said rectangular cross section of said jaws (117, 131) in opposite directions for engaging said second of said channels (123, 137);
- wherein said pin (124, 138) is disposed adjacent an end (121) 135) of said jaws (117, 131), said end (121, 135) being chamfered;
- and
- wherein a sensor (S) in said first of said channels, (122, 136) releases said jaws (117, 131) to close completely.
Dependencies are inferred from the claim text.