DE1145462B - Hydraulic forging press in underfloor design - Google Patents

Description

GERMAN

PATENT OFFICE

H 36427 lb / 49 g

REGISTRATION DATE: MAY 20, 1959

NOTICE THE REGISTRATION AND ISSUE OF EDITORIAL: MARCH 14, 1963

The invention relates to an underfloor hydraulic forging press with the lower one Tool carrier as a foundation spar and a tension column connection guided in this between that of several piston-cylinder units driven lower column cross member and the upper tool carrier.

Due to the eccentric forces that occur during forging, the columns have very unequal tensile stresses exposed. Furthermore, this results in a more or less large inclination of the upper one Tool carrier, so that high edge pressures can occur in the guide bushes of the columns. This causes considerable deflection of the pillars and the bending stresses that occur are therefore many times greater than the tensile stresses. As a result of damaging edge pressure there is considerable wear and tear on the pillars and guides. To absorb these stresses Extraordinarily heavy columns are required, which are primarily calculated and dimensioned for bending are.

The invention is based on the known knowledge that a reduction in the signs of wear and a dimensioning that is essentially only necessary based on the tensile stresses that occur the tension columns can be achieved when the tension columns of such a forging press are largely of the bending stresses are kept free. With a considerable relief of stress on the pillars due to the moment that occurs, the columns themselves are therefore easier to dimension without that the risk of a column breakage is to be feared.

For example, it is used to reduce the bending stresses in the frame columns of upper pressure presses Known in a dishing press, a straight guide with HiKe of angle levers and connecting rods of running mockery to achieve. This straight line is intended to be eccentric when it occurs Forces an inclination of the crossbar and the resulting bending stress on the columns largely be reduced.

Another known overpressure press is designed so that a part of the pillars only the tensile loads and the other part of the pillars only absorbs the bending loads.

Furthermore, hydraulic closed-die forging presses are known which use rolling friction locking Elements achieve additional axial guidance to prevent one or more drive pistons from acting laterally To relieve forces.

Hydraulic forging press
in underfloor design

Applicant:

Hydraulics G. mb H.,
Duisburg, Mülheimer Str. 72

Ewald Steinfort, Düsseldorf,

and Dipl.-Ing. Albert Hertl, Duisburg,

have been named as inventors

In another known hydraulic press, the bending stiffness of the structure is through reached several parallel and in rows arranged columns, their upper and lower ends respectively is designed as a plunger. The columns slide in one designed as an extension of the press cylinder Guide. Eccentric forces that occur are absorbed by the large number of column guides.

A well-known vacuum press in which the pull columns are designed as retraction pistons at the same time are, has a drive cylinder, which is attached to the lower tool carrier in connection with the Piston simultaneously performs a guiding function.

Special training features for accepting the sometimes extraordinarily large, cross-directional executives however, are absent. Since such presses are usually equipped with plungers, comes a tour in the manner shown is out of the question. In addition, the sealing elements are on Plunger cylinders are not suitable for absorbing such high lateral forces.

In order to largely keep the occurring moment away from the columns during eccentric forging, is according to the invention, the lower column cross member via guide bushes on one or more of the lower Tool carrier arranged round guides supported.

One or more guide shafts are here centrally and / or on both sides of the lower tool carrier rigidly arranged, on each of which the associated guide bushings arranged hi the lower column cross-member slide. As a result, the columns are more or less relieved of bending loads.

309 539/143

loads and the formation of the guide elements of the movable, the upper tool carrier holding Part of the press has the advantage that even with eccentric forging, the frame columns are essentially are only used on the train and do not have to take on a management role. The columns can therefore be dimensioned much more easily and require no precise surface treatment, which also saves considerable costs.

Simultaneously with the release of the tension pillars from harmful bending through the arrangement of a circular guide the piston-cylinder units are also relieved of transverse forces.

The hydraulic closed-die forging press according to the invention is shown schematically in the drawing and explained in more detail below.

In the figure shown, the lower tool carrier 1 is designed as a foundation boning and on the Fixed foundation. The plunger 2 and the round guide 3 are with the lower tool carrier 1 rigidly connected.

The lower column cross member S is by means of the guide bushes 6 arranged in its bore 4 on the Round guide 3 slidably guided and equipped with the press cylinders 7. About tension pillars 8 is the Column cross member 5 connected to the upper tool carrier 9 to form a movable unit. In the area the forging heat are the pillars 8 by protective sleeves 10 shielded. The retracts 11 are attached to the side of the columns 8.

Claims (1)

Claim: Hydraulic forging press in underfloor design with the lower tool carrier as Fundament mockery and a column connection between the one of several Piston-Zyünder units driven lower column cross member and the upper tool carrier, characterized in that the lower column cross member (5) via guide bushes (6) on one or several round guides (3) arranged on the lower tool carrier (1). Considered publications:
German Patent Nos. 873 655, 128 489;
British Patent Nos. 510,939, 329,857;
U.S. Patent No. 2169 036. 1 sheet of drawings @ 309 539/143 3.63