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1. WO1993017811 - MACHINE DESTINEE A FACONNER DES PIECES

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

[ EN ]

P a t e n t C l a i m s :

1. A machine having a reciprocating punch for forming objects and comprising means (73, 74) for transforming a rotating movement from a crankshaft (71) to a first reciprocating movement, and comprising a wedge mechanism (77, 78) adapted to transform the first reciprocating movement to a second reciprocating movement, c h a r a c t e r -i z e d in that the wedge mechanism (77, 78) and the crank (71) are oriented so that forming of the material takes place about the extreme position which gives the lowest possible material working rate for a given speed of rotation of the crankshaft (71 ) .

2. A machine according to claim 1, c h a r a c t e r i z e d in that the wedge mechanism (77, 78) has. such a wedge angle that the speed of the second reciprocating movement is lower than the speed of the first reciprocat-ing movement.

3. A machine according to claim 1 or 2, c h a r a c t e r i z e d in that the wedge mechanism comprises two wedges (77, 78), one wedge (77) of which defining the second reciprocating movement in a direction toward the extreme position around which the material is worked, the other wedge (78) defining the movement away from this position.

4. A machine according to claim 3, c h a r a c t e r i z e d in that the two wedges (77, 78) have an identical wedge angle, and that the first reciprocating movement is transferred to a bearing block (83) arranged between the two wedges.

5. A machine according to claims 1-4, c h a r a c t e r i z e d in that means (81, 82, 88, 89, 90, 91, 94, 95) are provided between the surfaces of the wedge or the wedges and the adjoining faces to reduce friction between the faces.

6. A machine according to claim 5, c h a r a c t e r i z e d in that said friction reducing means comprise rollers or pins (81, 82, 88, 89).

7. A machine according to claim 5, c h a r a c t e r i z e in that said friction reducing means comprise balls (81, 82, 88, 89).

8. A machine according to claim 5, c h a r a c t e r i z e d in that said friction reducing means comprise slide guides (90, 91, 94, 95).

9. A machne according to claim 6 or 7, c h a r a c -t e r i z e d in that a large number of rollers or balls is used.