L. Schuler Gmbh

L. Schuler Pressen Gmbh

Hans-Martin Dommer

Ewald Bergmann

Otto Kurz

Alfred Bareis

Franz Schneider

A punch which includes a notching tool and a separating which are adapted to punch at least one notch and a separating gap in each effective working stroke of the punch. A separating tool is formed by at least two independently disposed separating punches which are spaced from each other by a distance which is equal to or greater than a width of a web formed between two punched notches. Likewise, the notching tool may be in the form of two independent spaced notching punches.

Punch

Automatic sliding apparatus is provided for automatically stamping stator and rotor laminations for electric motors from workpiece blanks. To accommodate utilization of a plurality of sets of tool dies on a single driveable press ram, a tool changing device is provided which includes a tool holder guide track for movably guiding the tool holder along a straight guide path in a plane at a tangent to the workpieces to be machined. With the plurality of tool die sets mounted at the linearly guided tool holder, tool exchanges can be effected simply and automatically, utilizing a linear drive mechanism for moving the respective tool die sets along the frame of the tool holder.

Automatic slotting apparatus with tool changing device

A drive arrangement for a high speed mechanical press, especially a high speed cutting press, wherein the press drive includes two eccentric shafts connected by connecting rods with a slide. Mass balancing weights are provided for enabling a complete dynamic mass balancing, with the weights being articulated by additional rods and being moved in a direction opposite to the slide. The drive further includes at least three pairs of toggle or knee joint link arrangements, with the first arrangement being nearly horizontally disposed, the second arrangement being nearly vertically disposed, and the third arrangement being nearly vertically disposed and connected on the one hand with the slide and, on the other hand, with the mass balancing weights, with the pairs being arranged symmetrically with respect to the eccentric shafts.

Press drive

An automatic numerically controlled slotting or notching press arrangement which includes a multi-armed feed and removing device having a turnstile or turntable which is selectively indexed or rotated so as to convey blanks to various processing stations. The feeding and removing device is adapted to transfer the blanks from at least one stack unloading station to a centering or aligning station, a locating or turning station, a processing station, a stator stacking station, and a rotor stacking station. A numerically controlled indexing unit (a clamping table for blanks to be processed) and a numerically controlled tool changing is provided. The stack unloading station and the rotor stacking station form the first and last processing stations and are linked by a conveying device which operates independently of the turnstile or turntable of the feeding and removing device.

Numerically controlled automatic notching press

A press drive with a central cam shaft actively connected through a connecting rod with a slide guided in a linear guide. Side bars are symmetrically articulated with respect to each other on the slide. Mass balancing weights are driven in opposed directions corresponding to reciprocating masses of the press, with the weights being connected with the slide by other linkages. Pairs of toggle joint linkages are disposed symetrically with respect to the cam shaft. The pairs of toggle joint linkages include a first almost horizontally disposed toggle joint linkage that is articulated on the respective side bars and presents a bearing point on the press frame. A second almost vertically disposed toggle joint linkage that is connected with the first toggle joint linkage and is articulated so as to be guided by the press frame on the mass balancing weight. A third almost vertically disposed toggle joint linkage is articulated on the punch through a transmission bar with the first and second toggle joint linkages and is braced in a direction of motion of the punch on the press frame.

Press drive arrangement

An arrangement for an intermittent operation in a notching machine which includes a ram driven by way of a crank or eccentric drive which ram is articulated to a toggle joint. The notching machine has an operating cycle which consists of alternatingly successive notching and notch-free steps which is attainable by means of a cylinder-piston unit activatable pneumatically or hydraulically which unit is in operative connection with an eccentric supported on a pin with the eccentric being the central fulcrum of the toggle joint. A second toggle joint with a counterbalancing mass is diametrically opposed to the ram with the second toggle joint being articulated to the eccentric. The central pivot as well as the points of articulation of the toggle joints to the ram and counterbalancing mass are disposed substantially in one plane.

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Goppingen, Germany

Hans-Martin Dommer