US2123683A - Die press - Google Patents

Description

July 12, 1938. Q, OECKL DIE PRESS Filed March 50, 1937 5 Sheets-Sheet 1 1 q) Inventor Orro 05cm.

w mt L7 l/dh 5. 75121912 July 12, 1938. Q OE KL 2,123,683

DIE PRESS Filed March so, 1937 s Sheets-Sheet 2 I 56 T i I lhventor OTTo 05cm.

ATTGRNEy 0. OECKL DIE PRESS July 12, 1938.

Filed March 30, .1937 5 Sheets-Sheet 3 Fig. 7.

Fig. 8.

K O T T 0 July 12, 193s. V o. OECKIL v 2,123,683

DIE PRESS Filed March so, "1937 5 Sheets-Sheet 4 Inventor:

Orro OECKL WORN July 12, 1938. Q QECKL 2,123,683

' DIE PRESS Filed March 30, 19:57 5 sheets-Sheet 5 Fly. /2.

. v Inventor Orro 05cm. Wwcm STBZMZQ ATTORN i1 Patented July 1 2, 1938 p mi; PRESS I 'Otto Oeckl, Berlin-Baumschulenweg, Germany,

assignor .to He'nschel Flugzeug-Werke A. G., Sc'honeield, Germany, a stock company'of Germany Application-Magch 30, 1932, Serial No. 133,812 2 5 Claims. (Cl. 153-48) This invention relates to a die press for shapingfmetal sheets, and its principal object is to provide a machine which is serviceable in the production of panels of light metal as for in- 5 stance the metal sheetsofthe outer skin of airplane wings. and/or drawing, substantially in one direction only with merely slight deformations occurring in the other direction;

.Another object of the invention is to provide means for bending and/ or drawing metal sheets the edges of which may largely vary in shape.

A further object is to provide means for working sheet metal blanks with bentor angular 15 edges. I l I The invention primarily consists in a pressing machine comprising a frame yvith a .pressing head and two supports individually movable on the frame by self-locking means,tow ards and 20 away fromsaid pressing head. At least two individu'ally operative are mounted on each support in such a manner, however, that their relative position with respect to the supports may be .altered, within certain limits, i. e. laterally, 25 forward and backward, and about an axis atright angles to the afore-mentioned directions of movement.

The invention further consists in a machine comprising two or fourpress units of the men- 30 tioned type in parallel or twin-parallel arrangement which permits use in many combinations as best suited to the shape and size of. the metal sheets to be worked in. each instance.

. I Further objects and details'oimy invention will 35, be apparent from the description hereinafter Such metal sheets require bendingand' from the accompanying drawings showing.

Fig. 8 a top plan view of the parts illustrated in Fig. 7;

Fig. 9a perspective view of a pressing head with lateral extension; d j 1 Figs. 10 to 13 diagrammatic'plan views or a 5 twin-parallel arrangement of tour press units 1 illustrating different combinations of cooperating pressing heads and vise supports. I In the figures, reference characters I, 2, 3,]

designate fourpress units respectively, each of 1o.

which may be used separateiy as a self -contained binding and/or drawing ress provided the sheet metal blank to be machined does not exceed the maximum dimensions for which the unit is built. The four press units are of similar design.v Each 15 has a frame comprising two beams 5 and 6 0t I-iron. The beams are parallel with each other, and are held a predetermined distance apart by two end plates I and 8, two brackets 9 and I0,

and two rib plates II and I2. The plates and brackets are rigidly united-with the beams by any suitable means for instance by welding. A press cylinder 13 with a ram 14 is mounted on said.

brackets it and Ill substantially in the center ot .the press unit-to which it belongs. Ram. ll

carries a pressing head [5 with grooves l6 which serve for attachinggthereto a die (not shown) or a lateral extension H (see Figs. 9, 12 and 13) for a purpose to tie-described later.

embodiments of my invention by way of example.

The drawings show in Fig. l'alongitudinal section along line ll 4.0 0! Fig. '2 of a portion of a machine according to y invention;

Fig. la another longitudinal section along line i la-la of Fig.2;

2 a section along line 2-2 of Fig. 1, the combination of two press units being illustrated;

Fig. 3 a top plan view of thecombination oi Fig.- 2, only two 01 the vises being showni Fig. 4 a side elevationoi a support with the vises;

. Fig. 5 a top plan view of one of the vises; Fig.6 a section along line 6-6 of Fig. 2; p Fig. a section along. line 1+1 of'Fig. 6 showing a portion oi. a'support coupledwith a bridgas ingsueport Vises on movable supports are provided to grip and hold 'the edges of the sheet metal plate while it is shaped by a die mounted on the pressing. head., Only two such vises are shown in Fig. 3; and in Figs. 10 to 13, .vises are indicated only in as much asneeded in the combination illustrated by the respective figure. ,Care is takenv to permit the vises and supports to be adjusted in correspondence to the shape of the edges 01 the sheets to be machined, and to allow even for bent or angular edges of such sheets. For this pur- 4o pose, vise supports 18 and I!) are arranged on saidbeams 5 and 6 of each unit at opposite sides of the pressing head, and may be individu l moved towards the center or the ends of beams: 5 and. 6. Each of the supports l8 and I9 ,is made of twoparalleiI-b'ars -20 and 2| spaced from and connectedto each other by 'a foot plate 22, a op plate 23, end pieces 24, 25, 26 and 21,-. and a number of ribs 28. Top plate 23 is slotted or groovedi-at 29', andthe slot or groove may be widened atl3llas clearly shown in Figs. 3 and 8.

. The bottom'lor foot plate 22 has two holes 3| and 32 through which bolts 33 and 34 respectively 7 may be to hang by their nuts! and 36 between'beams 5; and 6; By their heads 31, 38,

ing operations: First, by turning the threaded I bolts 33 and 34 carry atransverse beam 33 formed of two channels 46 with connecting plates 4 I and 42. Transverse beams 33 are suspended below beams 5 and 6, and are preferably longer than the transverse distance of said beams 5 and 6.

Now it is obvious that each support may be shifted along the beams 5 and 6, and that the transverse beam 39 associated therewith will follow such movement. Furthermore, each support may beplaced on" beams 5 and 6 so as to fering with the beams. when a support is cor rectly adjusted, nuts 35 and 36 may be tightened by-a wrench through windows 43 and 44 of I-bar 26 whereby the support will be securely clamped to the frame beams 5 and 6 by means of transverse bar 39. v

Means may be provided for facilitating the shifting of the supports. Threaded spindles 45 and 46 may serve this purpose. Each of the spindles is associated with one of the supports, and is journaled in a hearing at one of the end plates I, 6 of the beams and in another bearing at the brackets 9, I6. These bearings are designated with 41, 46, 49, and respectively. Each spindle carries a nut 5I which has an upward extension 52 as clearly shown in Fig. 1a. Extension 52 passes through a hole 53 in the bottom plate 22 of the associated support, and forms a pivot for the latter. the end of the extension 52 and safeguards, if tightened, that the support be shifted. parallel with itself when the spindle 46 is turned by- ,means of a hand wheel 55 or by a power operated means such as an electric motor I55 indicated in Fig. 10. Ron the other hand-nut 54 is loose, support I9 may be turned about extension 52.. Support I8 is connected with its associated spindle 45 in the same manner as support I9 with its spindle 46.

On each support, at leasttwo vises 56 may be mounted as clearly shown in-Fig. 4. Each vise 56 comprises a body 51 with a stationary jaw- 56 and a movable jaw 59wh ich may be operated by means of a lever arm 66 to clamp the edge of a metal sheet between both. jaws. A bolt 62 is passed through a wide hole 6| of vise 56, so that ii the bolt is secured with its lower end in a support the vise may be moved in all directions in the plane of its supporting surface as far as the size of the hole 6I permits, and that thevise may be also turned about volt 62. A large washer 63', covers the hole 6I of the vise, and nut 64 of bolt 62 bears upon this washer when it is screwed on in order to hold the vise in an adjusted position with regard to its support while head 65 of bolt 62 is inserted in groove 29 of the top plate 23 of one of the supports. I

The device according to the present invention, and which has been described hereinbeiore, consists of a die press comprising the combined means for holding the edgesmf a metal sheet during the bending and/or drawing operation without causing undue local stresses of the material. The new device permits the machining of metal sheets having practically any size within the limits of the dimensions of the machine, and any desired edge shape, that is to say, even of sheets with bent or angular edges. For this purpose the clamping jaws are adjustable in accordance with I the outline of the metal sheet to be shaped by the bending and/or drawing action of a. die se- .cured to the pressing head I5. The adjustment A' nut 54 is screwed on spindles 45 and 46 with the aid of hand wheels 55 or a motor I55, supports I6 and I3 carrying vises 56 may be moved towards or away from the pressinghead I5. Second, by turning the supports I6 and I9 about their associated spindle nut extensions 52, the supports may be set parallel with the general direction-of the blank edges to be held by the vises. Third, by shifting the individual vises 56 with their bolts 62 along the grooves 29 of the supports I6 and I 6, the vises may be set opposite the desiredportions of the blank edges. Fourth, by moving the individual vises 56 .with respect to their bolts 62 in the plane of their supporting surfaces, and fifth by turning the vises about their bolts, the vises may be further adjusted to follow concavities and convexities of the blank edges. When the supports and vises are properly set and secured in their adjusted position by tightening-the screw nuts 35, 36, 54, and 64, the blank edges may be clamped between the vise jaws 56 and '53 with the aid of the lever arms 66. Thereafter, a die' secured to the pressure head may be raised by: the ram I4 to engage the blank from below and. to bend and/or draw it into the desired shape;

Owing to the preceding accurate adjustment of the vises, undue stresses of the blank will be;

eliminated or at least minimized during the machining operation. 0n the other hand, there the possibility of deliberately producing localized V stresses by adjusting the individual vises accordingly. There is also the possibility of first adjusting the vises. and clamping the metal sheet to be machined as stated hereinbefore. Then the die may be raised until a certain first bending and drawing of the metal sheet has been accomplished near the apex of the'die. Thereafter,

- the vises may be reset, particularly by advancing the supports towards the pressing head,- whereupon the raising of the die may be con- I tinned. Suchalternating setting of the vises and lifting of the die may be repeated depending upon the required final shape of the blank. Such stepwise operation ofiers the advantage that the relative movement of the metal sheet .does not ,cause a detrimental friction at the sides of the die. r

The invention further contemplates the arrangement of two and of four press units of the type described in order to form combinations .of machines as best suited for the particular shape of metal sheets to be bent and/or drawn in each instance. I

In the embodiment shown in-Figs. 2 and 3,

two press units Iand 2 a're mounted parallel with each other. In order to combine both units so as to form an entirety, bridges 66 and 61 are provided which may be coupled with the supports I8 and I9 respectively ofboth press units I and 2.

Each of the bridgesforms a.support of at least two vises, in the example of Fig. 2 of three vises wh ch are of the same design as the vises 56 .on

supports I8 and I9, and which for this reason are designated with the same, reference char actor. The supporting bridges 66 and 61 may be of a structure similar to that ofsupports I6 and I9, that is to say, each bridge comprises two,

and I8. are provided in the webs of the I-bars of the supports and the bridges respectively.

Pieces M have substantially the shape of a quadrangle with threadedextensions I andlt at the 5 front sides thereof. Coupling pieces 14 are held in their positions by nuts I9 and 80 bearing against washers 8| and 82 which in turn engage the pertaining support and bridge simultaneously.

As iearly shown, the coupling pieces 14 are so 1 ated that they do not protrude beyond the upper surfaces of the connected bridge and suprts. The top or vise-supporting, surfaces of /l i e bridges are flush with the top surfaces of supports l8 and I9, and a slot or groove 81 is provided in the top plate 10 of each bridge and forms the continuation of the grooves 29 of the supports when the bridge is connected thereto.

Grooves 84 serve to hold the ends of bolts 62 of the vises which are carried by the bridges. The

arrangement permits shifting of a vise from a support to abridge connected therewith, and

back again. In order to facilitate the insertion and the removal of the bridges, the ends of the bridges are rounded oifas shown at 83 in Figs. 3 and 8.

With both bridges in position, the units l and 2 form a combined press with two pressing heads which may be connected by simultaneously securing one' die to both of them. The vises and 3 the supports together with the bridges are individually operative and movable in the same manner as described heretofore with the exception, however, that the supports cannot be turned about pivots 52. When the bridges are removed,

each unit may be separately operated as stated The twin parallel arrangement of four press units permits a number of combinations some of which are-illustrated in Figs. 10 to 13.

Fig. 10 shows a duplication of the arrangement justdescribed with reference to Figs. 2 and 3, inasmuch'as bridges N and GI connect units 1 and 2 on the one hand, and units 3 and l on the other hand so as to form two twin presses. when the bridges are removed each unit may be used separately. I

with the vises removed from support ll of unit 2, and from support I! of unit I as in Fig. 11, units 2 and I may be used as a combined press having the combined'working length of both. Iii-the same manner units l and l -may be used. If, then, bridges I and 31 are coupled to the pertaining supports ll of units 3 and and "of units l and 2, all four units form one 56 press having their combined length and width.

If the lateral extensions I'lare applied to the heads ll of units i and I, and ii, then, bothpressing heads, and support ll "of the one unitfand support ll ofthe other are turned '00 parallel to eachv other as in Fig. 12, a metal sheet may be machined which has a width equal to the length of the supports, and a length equal to the distance of the diagonally opposite supit and I0. Simultaneously, units 3 and l as may be used in the same wayor Ina-manner as described with reference to Fig. 10. K If, finally, support I! of unitl, and'supnort ll,

of unit 4 are used as indicated in Fig. 13, the metal sheet to be worked may stlllbe longer, in 70 fact as long as the maximum distance of the mentioned supports from eachother.

While I have shown and'described certain new and novel features of my inventionit will be understood that well known equivalents of the 11s illustratedelements maybe used, and that other substitutions, omissions and modifications in the structure and details of the illustrated machine may be made by those skilled in the art without departing from the spirit and the scope of the invention which is indicated in the following 5 claims; f

7 What I claim is: u

1. A die press for shaping metal sheets comprising a frame, a "pressing head to which a die may be attached, two vise supports having sup- 10 porting surfaces and being movable-on said frame at opposite sides of said pressing head, self-locking and individually operative'means for moving said supports towards and away from said pressing head, means for securing said supports to said frame, and at least two vises on each of said supports, each of I said vises being individually operative and movable relatively to its associated support in the plane of-its supporting surface, and being also rotatable about an axis at right 20 angles to said plane. I

2. A die press for shaping metal sheets comprising a frame, a pressing head to which a die may be attached, two vise supports having supporting surfaces and being movable on said frame 25 l at opposite sides of said pressing head, two iindi vidually operative screw-and-nut drives for lnoving said supports towards and away from said pressing head, a pivot on each nut for its associated support so as to permit a slanting ad ust- 30' prising a frame including two parallel longitudi nal members spaced from each other, a pressing 40 head to which a die may be attached, two upper transverse members having supporting surfaces and being movable on said frame at opposite sides of said pressing head, two lower transverse members associated to said upper transverse. members 5 respectively and extending below both said longitudinal members, two pairs or screw bolts extend-' ing between said longitudinal members and connecting each upper transverse member with its and away fromsaid pressing head, and at least two vises on each of said upper transverse menibers', each of said vises being individually operative and movable relatively to its associated. transverse member in the plane of its supporting surface, andbeing also rotatable about an axis so at right angles to said plane.

4. A die press for shaping metal sheets coniprising a frame, a pressing head to which a die may be attached, two vise supports having supporting surfaces and being movable on said frame 55 at opposite sides of said pressing head. self-locking and individually operative means for moving said supports towards and away from said pressing head, at least two vises on each oiv said supports. each of said vises being individually operative, and one clamping bolt for eachof said vises, each bolt passing through a wide hole of its associated vise and being attached to the associated support so as permit alimited movement of the vise relatively the associated support 15- in the plane of its supporting surface and also a-rotation of the vise about an axis at right angles to saidplane.

6. A die press for shaping metal sheets comprising a frame including two longitudinal parallel members spaced from each other, a pressing head to which a die may be attached, two transverse members having supporting surfaces and being movable on said frame at opposite sides of said pressing head, each of said transverse members having a groove extending in the longitudinal direction of said transverse member, at least two vises on each of said transverse members,

each of said vises being individually operative,

and one clamping bolt for each of said vises, each bolt being attached to the associated transverse a rotation of the vise about an axis at right angles 10 to said plane.

OTTO OECKL.

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