DE2900900A1 - Eccentric press or punch - Google Patents

Description

-5- 2300900

Description;

The invention is based on an eccentric press or punch with connecting rods mounted on an eccentric shaft for actuation of the ram.

With the previously common eccentric presses or punches with connecting rod drive of the tappet from the eccentric shaft, the connecting rods work downwards onto the push rod, which leads to considerable bearing loads and deflection of the eccentric shaft leads.

The object of the invention is now with eccentric presses or punches with eccentric shafts and connecting rod drive of the plunger largely to avoid a deflection of the eccentric shaft and a relief of the Main bearing in the press stand can be reached while ensuring quick release and stroke adjustment to achieve this short strokes for high-performance high-speed impact presses.

The invention is characterized in that the connecting rod at vertical plunger arrangement, preferably lying horizontally, driven in opposite directions by the shaft eccentrics via angle levers as Actuate plunger drive and guided horizontally at the free end in scenes and the scenes in turn on the associated angle lever whose pivoting are guided slidably in the preferably vertical leg.

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Due to the opposite rotation of the connecting rods, a mass balance is achieved, wherein the angle levers divert the horizontal into a vertical flow of force for actuating the ram.

Furthermore, in the horizontal position of the opposite of the Eccentric shaft outwardly directed connecting rod, the same act via a T-shaped angle lever, via its horizontal T-bar on the one hand by means of a vertical push rod of the plunger and on the other hand a counterweight to the plunger can be actuated, whereby a balance of the slide weight is also achieved.

Furthermore, the push rods each act on the push rods via a conversion lever, the conversion lever on the one hand by means of Adjusting spindle for changing the ram position adjustable and on the other hand articulated to the push rod, while the push rods attack in between.

According to a further idea of the invention, the bearing shafts are also the angle lever for snow lifting to raise the plunger Equipped eccentric pin, the adjustment of the eccentric bearing shafts of the angle lever by means of a rack and pinion drive on the one hand and cam stop for end position on the other hand.

Finally, the bearing shafts of the angle lever can be used to adjust the stroke preferably height-adjustable in longitudinal slots on both sides

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be, the adjustment of the bearing shafts of the angle lever by means of bearing spindles with forced synchronization can be carried out are.

In the case of opposing connecting rods arranged in pairs, a pair Such connecting rods via angle levers with push rods on push rods act or two pairs of connecting rods can act on pushrods via angle levers with push rods, in the first case a central connecting rod and two opposing outer connecting rods and, in the second case, four alternating opposing connecting rods are provided are.

An embodiment of an eccentric press or punch with connecting rods mounted on the eccentric shaft for actuating the The plunger according to the invention is shown as a preferred embodiment in the drawing and described below namely show;

Fig. 1 is a partial view of the eccentric shaft with connecting rod

and angle lever for ram drive,

Fig. 2 to 4 the top view and side view for quick ventilation,

Fig. 5 to 7 the views and the section for the stroke adjustment,

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8 and 9 the views of the eccentric shaft with the

Connecting rod pairs and

F i g. 10 the general view of the ram drive.

As can be seen from the drawings, takes place in accordance with the partial view of FIG. 1 and in conjunction with the overall view According to FIG. 10, the drive of the ram 1 in the machine frame 2 with the workpiece table 3 from the eccentric shaft 4 About horizontally lying and opposing connecting rods 5 and 6 as well as angle levers 7 with push rods 8 on the conversion lever 9 to the push rods 10. Here, the connecting rods 5 and 6 are each guided horizontally at the free end in the angle lever 7 in link 11, the links 11 being slidably guided at 12 on the vertical leg. The angle levers 7 have a T-shape here, with on the T-bar 13, on the one hand, the force is diverted to the plunger 1 by means of a vertical push rod 8. Due to the opposite Actuation of the connecting rods 5 and 6 on the one hand and the tappet counterweights 14 with tab guide 15, on the other hand, relief of the machine frame 2 from bending forces is achieved as well as avoiding vibrations.

The push rods 8 act according to FIGS. 1 and 10 via conversion levers 9 for stepping up or stepping down on the push rods 10 and tappets 1, the conversion lever 9 being adjustable on the one hand by means of an adjusting spindle 16 to change the plunger position and on the other hand are articulated to the respective push rod 10,

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while the push rod 8 engages in between. Thus, the ram height to the workpiece table can be adjusted with the adjusting spindle 16 3 set.

The bearing shafts 17 of the angle lever 7 are also for quick release Equipped with an eccentric pin 18 to raise the plunger 1. Here, the eccentric bearing shaft 17 becomes the angle lever 7 on the one hand by means of a hydraulically operated rack and pinion drive 19, 20 with hydraulic cylinder 21 according to FIG. 2 and 3 adjusted, on the other hand a cam stop 22 is provided for the end position of the control cam 23, braced and releasable by means of hydraulic bolts 24, as shown in FIG. 4.

Furthermore, according to FIGS. 5 and 6, the bearing shafts 17 of the angle lever 7 for adjusting the stroke of the plunger 1 are on both sides Longitudinal slots 25 arranged adjustable in height by means of bearing spindles 26. Here, according to FIG. 7, there is a common one Adjustment drive 27 with screw pinions 28 on the worms 29 with worm sleeves 30 for the bearing spindles 26 for forced synchronization.

Finally, the lever ratio on the angle lever 7 is the corresponding one Change of the stroke length continuously adjustable, for which the horizontal guides 31 of the scenes 11 with slidable Height guide 12 are to be designed to be adjustable in the respective angle lever 7.

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According to FIG. 7, a central bearing 32 can also be seen.

In the case of a pair of connecting rods 5 and 6 acting on push rods 10 via angle levers 7 with push rods 8, the same applies 8 and 9 expediently a central connecting rod 6 and two outer connecting rods 5a and 5b that run in opposite directions are provided to provide a Avoid bending the eccentric shaft 4. With two pairs via angled lever 7 with push rods 8 on push rods 10 Acting connecting rods 5 and 6 are, as not specifically shown here, correspondingly four acting alternately in opposite directions Connecting rod provided.

Thus, with the press or punch drive according to the invention achieve a symmetrical power transmission from the drive to the ram, namely over two or four points with a stroke adjustment by means of a threaded spindle, as shown. Due to the opposing arrangement of the connecting rods, the Eccentric shaft and a relief of those located in the press stand Main camp reached. Due to the synchronous adjustment of the angle lever bearings in the vertical direction, changes can be made The lever ratio can also be used to continuously change the stroke length of the tappet. Furthermore, the quick release of the The ram achieves that extremely small strokes can be used, which is essential for high-speed impact presses. Also draws the execution according to the invention by great ease of use from -0 30029/0373

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Claims (1)

PATENT LAWYERS DR. RUDOLF BAUER · DiPL _n -SNG. HELMUT HUBBUCH DIPL.-PHYS. ULRSCHTWELMESER 29ÜÜ900 WESTERN 29-S1 (AM LEOPOLDPLATZ) D-753O PFORZHEIM, (WEST-QERMANY) ■ y (O7231) 102290 / TO January 4, 1979 II / Be Company RWM-Raster-WerKzeugmaschinen GmbH., 7136 Ötisheim ¹¹ eccentric press or punch " Patent claims: 1.) Eccentric press or punch with on an eccentric shaft mounted connecting rods for actuating the tappet, characterized in that the connecting rods, when the tappet is arranged vertically, preferably lying horizontally, are driven in opposite directions by the shaft eccentrics and act as a tappet drive via angle levers. 2. eccentric press or punch according to claim 1, characterized in that the connecting rods at the free end in scenes guided horizontally and the scenes in turn on the associated angle lever when it is pivoted in the preferably vertical Legs are slidably guided ™ 3. eccentric press or punch according to claim 1 or 2, characterized in that in the horizontal position of the counter-rotating from the eccentric shaft outwardly directed connecting rod, the same 0 3 0 0 2 9/0373 Act via a T-shaped angle lever, above its horizontal T-bar on the one hand by means of a vertical push rod of the plunger and on the other hand a counterweight to the The plunger can be actuated. 4. eccentric press or punch according to claim 1 to 3, characterized in that the push rods each have a Translation levers act on the push rod, the translation levers on the one hand adjustable by means of the adjusting spindle to change the plunger position and on the other hand with the push rod are articulated, while attack the push rods in between. 5. eccentric press or punch according to one of the preceding claims, characterized in that the bearing shafts of the Angle lever for quick release to raise the ram with Eccentric pins are equipped. 6. eccentric press or punch according to claim 5, characterized by adjusting the eccentric bearing shafts of the angle lever by means of rack and pinion drive on the one hand and cam stop for end position on the other hand. 7. Eccentric press or punch according to claim 6, characterized in that the control cams with the cam stop can be tensioned and released by means of hydraulic bolts. 030029/0373 8. Eccentric press or punch, in particular. According to one of the preceding claims, characterized in that the bearing shafts of the angle lever for stroke adjustment are preferably adjustable in height in longitudinal slots on both sides. 9. eccentric press or punch according to claim 8, characterized in that the adjustment of the bearing shafts Angle lever can be carried out by means of bearing spindles with forced synchronization is. 10. Eccentric press or punch according to one of the preceding claims, characterized in that the lever ratio infinitely variable on the angle lever to change the stroke length accordingly is adjustable. 11. eccentric press or punch according to claim 10, characterized in that the horizontally guided scenes Slidable height guide is adjustable in the angle levers to adjust the leverage. 12. Eccentric press or punch according to one of the preceding claims, characterized in that in a pair .about Angle lever with push rods on connecting rods acting on push rods, a central connecting rod and two outer connecting rods that run in opposite directions are provided are. 030029/0373 13. Eccentric press or punch according to one of the preceding claims 1 to 11, characterized in that four connecting rods acting alternately in opposite directions are provided with two pairs of connecting rods acting on push rods via angle levers with push rods. 030029/0373