US 5,398,536 AGranted

Wobble press

OwnerWalter Schlatterinventor

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Abstract

In a wobble press with a first wobbling die-half (1) and an axially parallel moving second half-die (2), the wobbling motion is generated by a plurality of hydraulically actuated working pistons (5) cyclically engaging with the wobbling half-die (1). By means of the elimination of centrifugal forces by a counterweight (G) connected to the wobbling half-die (1), the precise guiding of the die-halves (1,2) by a centering disk (17) and the avoidance of a mechanical drive by using a multiple-pistons pump (20) and a hydraulic control system for the working pistons (5), it is possible to reduce undesirable rotary forces, vibration, friction and heat generation in such a way that substantially higher wobble frequencies and shorter processing times are attained at lower cost while maintaining the geometrical wobble effect owing to the higher wobble frequency, with a simple and rapidly acting control of the extent and form of higher wobble frequency, with a simple and rapidly acting control of the extent and form of the wobbling movement even during operation, thus making it possible to preselect the most suitable pressing program.

Claims12

Dependent claims

A wobble press comprising in combination:

a first die half;
a movable second die half axially parallel relative to the first die half;
means for wobbly driving said first die half, having a mass and a center of gravity S.sub.o, with regard to a longitudinal central axis (A) of said press, wobbly around a fulcrum point (M), said wobble drive means including hydraulic working pistons which are provided with a regular, defined, pulsating flow of a hydraulic medium, said hydraulic working pistons being connected with said first die half for the generation of a wobble movement;
a counterweight (G), having a mass and a center of gravity (S.sub.u), connected to said first wobbly driven die half, said counterweight (G) being so structured and arranged that the product of the mass of said counterweight (G) and the eccentricity spacing (E.sub.u), of the spacing of the center of gravity. (S.sub.u) of said counterweight (G), relative to longitudinal axis (A), at least approximately corresponds to the product of the mass of said first die half and the eccentricity spacing (E.sub.o), of the spacing of the center of gravity (S.sub.o ) of said first die half, relative to longitudinal axis (A), so that the centrifugal forces of both said counterweight (G) and said first die half at least approximately compensate each other.

1 more element

Dependencies are inferred from the claim text.