US2785594A - Vertical hydraulic press - Google Patents

Description

March 19, 1957 F, EN ET AL VERTICAL HYDRAULIC PRESS 2 Sheets-Sheet 1 Filed July 20, 1954 INVENIOAPS March 19, 1957 EBEN ET AL VERTICAL HYDRAULIC PRESS 2 Sheets-Sheet 2 Filed July 20, 1954 INVENTURJ N fi'ofmalnzz/ HTTYJ.

In order to carry out a plurality of successive operations use is made of presses for the treatment of a work-piece in whicli th eindividiial partsof the tools such'as mandril, container, dieretc'a are capable 'ofefiecting different move- ;ments relatively to one another. I :The workpiece itself o thereby 'remains substantially stationary. q The invention solves the problem of subjecting the y-work-piece to a number of successive treatments by w means ofa'difierent construction of press.

According to the invention, the :press is provided with three plungers, which are preferably actuated together, and with a turntable carryingthe work-pieces in moulds, containers or the li'kefwhereby the work-pieces are mounted on the-turntable at a distancewhich corresponds to f the distance of the plungers such-that the 'work-pieces present on the turntable can be treated in succession by the several plungers of the press.

In order to be able to release the pressures, the press table is supported at least in the working range of the plungers that are on the press table. The press table itself may be provided with additional devices, such as bottom plates for containers and the like, which become operative during the operation of the plungers.

A preferred form of construction of the press according to the invention consists of a three-column press which is known per se. In the case of such a press the turntable is rotatable around one of the three columns in order to obtain favourable constructional relations. Further, this construction enables three plungers to be arranged especially favourably, namely in such a way, that one plunger lies in the central axis of the three columns, whilst the axes of the two other are preferably at the same distance from the central axis as the columns. In that case, three column axes and two plunger axes lie along a circle in the centre of which lies the axis of the third plunger.

, Such a press can be used with special advantage for the production of perforated ingots, more particularly steel ingots. In the production of perforated steel ingots which are for instance further treated in extrusion presses, the lubricant used is glass. If in the production of such perforated ingots use is made of presses in which the work-piece is treated without any substantial change of position by different movements of plungers, mandrils and the like, difficulties are encountered, due to the fact that the lubricant penetrates between the tool parts which have to be moved relatively to one another. Since the glass adheres to the walls of the tools after cooling, it can be removed only with difficulty, whereby the further operation of the press is impeded. These difficulties do not arise when use is made of a press according to the invention for the said purpose, since the lubricant which escapes reaches only such positions where it is not detrimental or where it can be easily removed.

A press for the production of perforated steel ingots can be suitably constructed by using the first outer plunger for upsetting, the second one, which lies in the centre,

:2 z for perforation fand the third plunger-y"whichdies' dutside "foli' the iother side, for "Shearing ofi-the bbitom Of the 5 which'ha's to "exert the large'pressures, namely the pcrfo'iat- 1 ing'" plunger, lies in the centre axis of the press so' t'hat the pressures which arise during the operationfof the said plungerfiare' -t'aken up uniformly by all the three dolum ns. The pressures'which areexertedby the upsetting and the'=*shearing' bif-jalungers can be't aken upwithout us'ed for the production of perforated-steel ingots, it is "an advantage' to provide additionally a devic e' for ex- -pelling the ingotswhich have been-perforated and-sheared 0E. This device can be provided in such a po'sition'uhder ='-the' pr'ess table that"the expelling of a completed workoff, orperforationof otheringots. ln' such a press' 'the"perforating plunger-andmr "the shea'ring oif plun ger is preferably associated with a crosspiece which is capableof--moving independently ofthe lunger ahdwhich s'erves as aguiding f'or the plunger n'd/or as a 'scraper duringthe return movement of the lunger. In-"itsdowestposition this cross-piece is suitably centered in thefcontainer.

-The accdmpanying-drawings' show, by way of example, a hydraulic press provided with three parallel plungers and an ejecting device.

Referring to the drawings,

Figure l is a plan View of the press;

Figure 2 is a section along the line IIII in Figure I;

Figure 3 is a section along the line III-III in Figure 1;

Figure 4 is a section along the line IV-V of Figure 3;

Figure 5 is a section along the line V-V of Figure 4; and

Figure 6 is a plan view of the turntable.

The press comprises three columns 1, 2, 3. The perforating piston 5 lies with the perforating plunger 6 on the central axis. Along the arc comprising the columns 1, 2, 3 lie the axes of a plunger 7 intended for the upsetting of the work-piece and of a plunger 8 intended to shear off the bottom of the perforated work-piece. The plungers 7 and 8 are actuated by pistons 7a and 8a respectively. Around the column 3 there is rotatably mounted a table 9 on ball bearings 9a. This table accommodates container holders Illa for the containers 10 in corresponding recesses. Figure 3 shows a workpiece 11 in the container; the same has the shape it possesses after it has been upset by the plunger 7. Figure 2 shows the work-piece Lia with the shape it has received after it has been perforated by the plunger 6. The left side of Figure 3 shows the work-piece 11a in the position and shape which it possesses before the shearing off by the plunger 8. It lies over a bottom piece 12 which rests on the press table 18 and which is provided with a central bore 13 so that the plunger 8 can eject or shear off the bottom of the perforated piece 11. To the actual press table there is connected a table 14, into which a plunger 15 can be introduced from below, which plunger is actuated by a pressure piston 16. The plunger 15 serves to eject the completed perforated. bottomless workpiece 11b (Figure 5). The work-piece is thrown out upwards, so that it can be conveyed away over the floor. It will be seen from Figure 6, which is a plan view of the turntable 9, that the work-piece which is in the position A lies under the upsetting plunger 7; the work-piece which is in the position B lies under the perforating plunger 6, viz. in the central axis 4 of the press, the workplunger during the perforation.

. piece which is in the position C lies under the shearing off plunger 8; and the work-piece which is in the position D lies over the table 14 which serves to throw out the work-piece. Thus, when the turntable turns around, the work-piece travels successively to the positions A, B, C, D. Before the position A, there is sufficient space available on the turntable for cleaning the containers and for inserting a fresh ingot to be perforated. As can be seen from Figure 5, the table 14 is provided with claws 14a which engage in corresponding recesses of the container holder 10a, in order to hold the container in this position against the pressure of the ejecting plunger 15.

In order that the perforating plunger 6 and the shearing off plunger 8 shall not take along the work-piece or the container during the upward movement, cross-pieces 19, 20 are provided, which can be moved independently of the plungers. These cross-pieces are placed on the containers 10 during the return movement of the plungers 6 and 8. They serve at the same time to guide the V plungers 6 and 8, and for this purpose they may be constructed in such a way that they are secured in their lowest position in the containers 10. The cross-piece 20 is for instance provided with an annular flange 20a, which is pushed into the container 10. This flange may serve at the same time to smooth the upper surface of the work-piece 11a which spatters upwards during the perforation. This is possible when the cross-piece 20 is pressed downwards only with a force which is small as compared with the force that is exerted by the perforated However, the crosspiece 20 serves at the same time for providing the workpiece lla with a smooth upper surface.

The actuation of all the cylinders may be eflFected in such a way that they are automatically operated-simul' taneously. However, it is possible to actuate the plungers successively in order to avoid any possible overloading of the columns. The actuating means may be coupled with the movement of the turntable and with the operation of the cross-pieces.

We claim:

A three-column hydraulic press for the production of pierced steel ingots, comprising: three vertically movable plungers, three hydraulic pistons, one for each plunger, a turntable rotatable about one of the three columns of the press, and molds carried by the turntable and adapted to accommodate work-pieces, the molds being all at the same radius from the axis of rotation of the turntable and being spaced apart by equal angles, and the plungers being so arranged that as the turntable rotates, three adjacent molds simultaneously become co-axial with the three plungers.

References Cited in the file of this patent UNITED STATES PATENTS 795,121 Heinderich July 18, 1905 1,293,833 McGary Feb. 11, 1919 1,555,897 Winder et a1. Oct. 6, 1925 2,362,054 Denison Nov. 7, 1944 2,382,041 Ernst Aug. 14, 1945 2,449,365 Bober et al "Sept. 14, 1948 2,556,010 Swanson June 5, 1951 FOREIGN PATENTS 547,951 Great Britain Sept. 18, 1942 672,965 Germany 'Mar. 13, 1939

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