DE3146830A1 - Rapid-acting forging press - Google Patents

Abstract

A rapid-acting forging press with double clutch and mass balancing of the rotating drive parts is described. The press has a horizontally mounted camshaft, whose cam plates are used for mounting and supporting purposes and whose free journals are provided for the attachment of balance weights. The two free journal ends are here designed for receiving one clutch each for transmitting the required torque.

Description

High-speed forging press

The invention relates to a high-speed forging press with a double clutch and mass balancing of the rotating engine parts, especially for massive forming.

Such forging presses are eccentric presses, where because of the high switching frequency and the fast speed of the eccentric shaft the coupling acts directly on the eccentric shaft.

Starting and stopping large gears with corresponding masses can thus be omitted, but the torque required for the Arbeitsgan3 must be introduced into the eccentric shaft without reducing gear ratios. The clutch and brake masses to be accelerated and decelerated again as well as the imbalance of the eccentric drive put the press in a rocking one Movement that up to now had to be absorbed by complex foundations. One This means that there are limits to increasing the speed and lengthening the stroke. Since the profitability of a forging press depends, among other things, on its service life the tools used depend on the shortness of the hot contact time, In addition, an expensive foundation raises the investment costs, it is the job of Invention, higher speeds of the eccentric shafts with higher rigidity of the system while avoiding own emissions.

It is known to use quick-change devices to meet these requirements to be provided for venting the clutch (DBGM No. 1928 313), which at high speeds ensure a shortening of the braking time. To absorb the natural vibrations the inrush and the rotating unbalanced masses are vibration isolated Foundations planned (magazine for industrial production Wt 67 / Springer-Verlag 19 ??, page 657) With the one-sided arrangement of clutch and brake, the missing one Mass balancing of the eccentric drive and the eccentric shaft bearings in the press frame The following negative effects can be observed on the eccentric shaft journals: 1. Large diameter of the coupling with correspondingly high moments of inertia.

2. Uneven rotation of the eccentric shaft.

3. Inclination of the eccentric shaft when lifting in the middle due to unequal Mass distribution of flywheel and clutch (see Industrie-Anzeiger r! R. 1 of 7.1.1981 / 103 Jg, page 44).

4. Swing of the press from left to right due to the inrush the clutch, 5. Swinging the press from front to back due to acceleration of the unbalanced masses of the excerpt.

6. Increase in the effects of imbalance when the stroke is reduced or faster Eccentric shaft speed, 7. Increased deflection of the eccentric shaft when widening the work area.

The invention is based on the object of a high-speed forging eccentric press to create longer strokes with high rigidity in an economical way Can travel at a higher speed without damaging its own emissions.

This object is achieved according to the invention in that the eccentric shaft Driven by two opposing clutches, the imbalances of the eccentric drive are balanced and the eccentric shaft is mounted on the eccentric cheeks.

According to a further embodiment of the invention, one to increase the Safety and reduction of the moments of inertia also have two or more brakes intended. To compensate for the imbalance of the @ xzenter engine, another Formation of the invention the eccentric shaft cheeks to support the pressing forces provided, in addition to the reduction in size of the push rod head, the arrangement of To enable balancing weights and to reduce the deflection of the eccentric shaft.

The advantages achieved with the Crfinduny are in particular: that the natural vibrations generated by the clutch and the engine are almost completely can be avoided, the hot contact times are shortened and longer strokes are used can without damaging the emissions. Oie at a press installation The investment costs arising from vibration-isolated foundations can be considerable be reduced.

Due to the possible higher speed of the eccentric shaft and the resulting derived shorter hot contact times during forging are longer service lives of the This is to be expected. By increasing the stroke and the working area, the Range of use of the high-speed forging press @significantly expanded.

The invention will now be combined with the aid of an exemplary embodiment described in detail with the drawing.

Us show: FIG. 1 shows a vertical section through a device according to the invention trained press; FIG. 2 shows a section through the press according to FIG the line A-- A; Figure 3 shows another embodiment in a figure 1 approximately corresponding Depiction.

FIG. 4 shows a further embodiment in one of FIGS. 1 and 3 approximately corresponding representation.

The quick-cut press shown in the figures consists of their basic structure initially from the press frame 1 with in the press frame 1 mounted eccentric shaft 2 and their retracted eccentric pin 3 over Connecting rod 4 by means of pressure socket 5 and actuator 6 connected tappet 7.

The torque required for the forming process is provided by two clutches 8 introduced half in each of the eccentric shaft ends.

To drive the flywheels 9, one or two are not shown Electric motors used. Instead of the flywheels 9, especially with larger Machine gears with countersunk use.

Due to the halved torques, economical dental cladding can be used will be realized.

The eccentric shaft 2 is in the press frame 1 on the eccentric cheeks 10 supported, while the connecting rod 4 on the smaller diameter eccentric pin 3 are stored. Preferably, the balancing masses 11 are part of the Eccentric shaft 2 is formed, however, as a separate version, not shown Units are fastened on the eccentric shaft 2.

One or more brakes are used to slow down the rotating masses 12 are provided, which are connected to the eccentric shaft via Zann gear 13.

Claims (7)

Claims 1. Eccentric press with double clutch and adjustment of the rotating engine parts, especially for the forge, characterized by that the eccentric shaft 2 is provided with a coupling 8 at each shaft end and the eccentric shaft 2, which is supported on the eccentric cheeks 10, with balancing weights 11 is provided. 2. High-speed forging press according to claim 1, characterized in that that one or more connecting rods 4 are used. 3. high-speed screw press according to claims 1 and 2, characterized in that that the balancing masses 11 attached as separate units on the Cxcentre 2 will. 4. Shell forging press according to claims 1, 2 and 3, characterized in that that the Eremsen 12 with a second toothed gear 13 on the opposite Side of the eccentric shaft are tied. S. high-speed forging press according to claims 1 to 4, characterized. that the brakes 14 as shown in Figure 3, via angular gear 15 with the eccentric shaft 2 connected senses C. High-speed forging press according to claims 1 to 5, characterized in that doe brakes by self-locking not shown Worm gear with preferably 450 pitch angle connected to the eccentric shaft are. 7. high-speed forging press according to claims 1 to 6, characterized in that that the brakes 18, as shown in Figure 4, directly or indirectly on the Eccentric shaft 2 are arranged. B. high-speed forging press according to claims 1 to 7, characterized in that that the flywheels q, as shown in Figure 4, on the housings 16, which with the press stand 1 are connected, are stored. Instead of the flywheels 9 gears can also be arranged. . Schnei lsch: lower press according to claims 1 to 8, characterized in that that with several connecting rods 4, the eccentric cheeks 10, which are between the connecting rods 4, can be used to brake the rotating engine parts.