DE1577159A1 - Press frame - Google Patents

Description

DipL-Ιπβ. G. Schmife -Helff My reference: 66039

Patent attorney

5 K ö I η Λ 577 * 1 59

Gereonshof 38 Call 213032

Applicant: ii.W. Bliss Company
217, Second Street
NW. Ganton, Ohio / USA

Presaenrahmen

The present invention is concerned with presses, and more particularly relates to a press having an improved press head.

The invention is based on the example of a Presaenkopfes a four-column Press described, which is driven from below on one side} Such presses are used when a constant Applying pressure of a certain strength is one thing, for example in embossing, rhyming, embossing and in operations of the pail Need dwell time; however, it goes without saying that the invention has a much broader application and also in double-acting and generally applicable presses as well is applicable to presses in which the movable press table is driven downwards.

The conventional column presses have a substructure and a press head, which is held by four columns. The press head is usually a box-shaped element with lugs or sleeves for the pillars at its corners. The pillars are provided with shoulders _f on which the prease head rests, and on those above the

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Pres .-. En head exciter-.dei. Nuts are preloaded along the pillars to hold the press head in place. Since the corners of the press head are held and the pressure acts in the center, the kaster: finished press head tends to bulge from bottom to top. Although this deformation is very small, it does cause; .-; the pillars bend inward by a measurable amount. Attempts have go /, ο it · t, άε.Γ; '- this deflection οι. I :; ? Ltl ^: cr vj-t . urcr ει - <are polite when rigid processing is required.

The present invention provides several distinct advantages over the prior art: "k. First, an Iresserikopf according to the invention is able to i ± e P ^ i plates α back evenly without ner? - <:. <. 3v.f. : · ■■; · Platter.aurchbJ tgui.g ι. \ - Τ > per pillars. Furthermore, as a result of an arrangement of struts, there is hardly any tendency to bend the press head or the pillars, v / ei the pillars in the first place In addition, the bending forces due to the new strut arrangement are largely absorbed by the struts, which bend evenly under load.

In accordance with the present invention, one is supported by a plurality of pillars The die head is provided with a plate which has a die support surface running at right angles to the press axis, Furthermore, several struts are provided, which each have a Säulenansa.tz at their upper end and find with their lower are attached to the plate, and there are tension rods which extend laterally between the columns, so daä the Plate loading forces evenly from the dei. Strive for eufgenouvi en and axially introduced into the columns without a

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- 'S -

Sv /// S i «# 3

significant bending of the plate surface is caused.

The invention will now be explained in the following description, reference being made to the accompanying drawings will.

Fig. 1 shows a side view of an inventive. Ausp-Ijldeten Four column press.

Fi ". C shows a plan view of a preferred embodiment of the invention along the line 2-2 in FIG.

Figure 3 is a side view taken along the staggered line 3-3 in Fig. 2, with part of the "inventive Arrangement is shown in vertical section.

FIG. 4 shows a vertical partial section along the line 4-4 in FIG .

Fig. 5 is an exaggerated schematic illustration showing the effect of the forces loading the pillars dynamic with a conventional four-column press represents.

Fig. 6 is an equally dynamic representation of the invention, the elastic here also being exaggerated Deflection of the struts under operational load of the pillars is shown.

FIG. 7 shows a schematic plan view of FIG. 6, in which the lateral forces acting on the columns are shown 3 j Ti'i.

0Q981U / 0246

- H.

1 shows, more or less schematically, a four-column press A with a drive located below, which has a substructure B and a press head C which is held by four columns D. The substructure B is stored under the surface of the earth F in a pit E and supports a vertically different pie & bentisch G, which is led through the pillars D at its corners. The press head C holds a stationary plate H in the vertical part Abct'u .1 front structure B ^- . The press table G can support the lower half I of a mold, while the platen H is formed so as to support the upper half J with respect to the movable press table G immovably.

According to the illustration in FIGS. 1 to 4, the press

head C and the plate H preferably from a single casting, the press head C having column sleeves 16, the are provided with an internal bore 18; these holes 18 can fit over the smaller diameter ones Part 20 of each pillar D can be pushed. According to the illustration in FIG. 1, the press head C rests against shoulders 22 on the pillars when the press head is mounted on the Preorjen frame will. Column nuts 24 are screwed onto the ends of the columns protruding beyond the sleeves 1 $, with which the Press head is pulled down against shoulders 22.

_σ The parts 20 of the pillars D can be in any known manner

cd are biased, for example by the fact that the parts

- ¹ heated and then unscrewed the nuts 24 and looks before ο

^ the parts 20 have cooled down. The press head C also white

4> several struts 27 which are integral with the column sleeves Ip

and the plate H are made. The struts 27 run diagonally from the associated column sleeve Ib to the center of the plate H

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and form, so on the press grow a crosshead 28, what can be seen on testing from FIG. Outside there are awis see the column sleeves Io and integral with these Zugstsbe 29 provided because e form a box-like frame. The file are arranged one below the other in such a way that they act as a unit under load, which will be explained in more detail below is described.

In conventional column presses, as shown in Fig. Is provided a box-like column head G ", are attached to des3en four corners of the pillars J3 ^first sub-load on the press head C and the base B tend ^f ^ for deflection so daii laterally directed bending forces on the Ends of the columns act, which is shown by the laterally directed force vectors in Fig. 5. The forces that occur cause the columns to bend inward in their lath of the press base B ¹ at high loads large enough to be of importance, since the press no longer works with the accuracy required for precision press operations during this bending.

When according to the present invention the plate H is loaded

there is no noticeable surface deflection ο

ο and the bottom 32 remains parallel to the press table G, if u>

^ a certain axial movement can also occur, which is shown in FIG. 6

- ». Is exaggerated. Under dynamic load

to divide the struts 27 the tuf the plate H v.-ir & er.c-eri forces evenly on the 3-pillar sleeves. Id, where the power transmission is such ifct, d & tt , each of the pillars D ine εχ -'rle Kraftkompo-

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receives nent and lateral force components from the load, which are shown in Fig. 6 with the force vectors. The AxialkoiTtpoxienten act vertically through the column nuts 24 and are absorbed directly as a tension by the columns D and the substructure H from abruptly the laterally directed force components act in opposition to one another and cancel each other out via the tension rods 29. The press head C geinä ^ dei · invention effects as · ;, dal; no üoi / iuj icne; n bending forces act on the pillars, so de -: .'.-; a bend ^, which ßäul ^ n ν.ie ti- in Fig. 5 'is turned off, does not appear, liceh v. ^.:;: ie.-iti ^ ^r ^ uie it is ssene, do Ii uie struts If a symmetrical -.- .- diener he t "the u:. 1; oll en that the Ilattenoberfläciie: Li λλ ikJiclie Vt .rbxerung learns.

Note more precisely that the struts : Since the struts 27 run at an angle of approximately 45 degrees to the Fressenpchse, bending forces caused a consistent deformation of the struts, as shown in exaggerated form in FIG. The struts 27 bend jedocn due to the symmetry of the cross-shaped Ctrebenanordnung uniform, so the plate dan only moves axially without bending or tilting. This result also occurs with a slightly eccentric loading of the plate H.

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Claims (1)

KoIn, α en ij. Ap No dykes: Ar.neläe-T '~ "-. · .:« E ^ V Godparents tans ι ι- t c ii e 1 ") Press; nit Einein festgehaj.teilen on uiehreren columns with respect to a movable platen Pressenfcopf _s dacrarcn gekennzeicnnet _f because the Pr ^ oei-KCPF (C) a Fixed Mech ^ stt ria'C'i ': vh; has., which under the; The top of the columns (U) is at right angles to the press axis - <n ^ e ~ '-lu-ne te-i, iibene, so that several struts (L-7J provided; ■ na, ο:' ν. ::: 't one: iinde et ^T «especially in α or ritte of the plate (H) fastened s'rid and naci; above and outside diverge and with their: n other ends ui Jas ■ at the end of a pillar (D ) angeocii_i.03o '_: n, j un Ua more tension members (2b) in a common 1ί ::>. ^{^:?} -' i: he disposed of the plate (H), the horizontal vcjZ · ■ - , ten uni jev.'ei'ls zv / ischen two columns (1) ~ "i ^ rai't that bends under 1-ist in the press head (C) occur primarily in the struts (2?) and the plate (H) remains unbent. 2.) Press according to claim 1 with four columns, characterized in that there: .-, the press head (C) has four struts (27; the dj ogonai at about an angle of 45 degrees run to the press axis. 5. ) Press according to claim 2, da.iu.rch gokennzeiermet, dni the on; iie Il-iüLe (H; .virkende uast yvird yvird into components, di.e generate a uniform J) jerk in the struts (2 ^, ujh t Jai, these burdens also on the pillars (uj in 0098If) / 024b BAD ORIGINAL Laterally and axially directed force components are resolved, with the laterally directed force components be absorbed by the tension members (29). 009810/0246