US1434949A - Die cushion - Google Patents

Description

R. W. GLASNER.

DIE CUSHION.

APPLICATION FILED MAY 28, 1920.

Patented Nov 7, 3922.

3 SHEETSSHEET 1.

R. W. GLASNER.

DIE CUSHION. APPLICATION FILED MAY 28, 1920.

Patented Nov. 7, 1922.

3 SHEETS-SHEET 2.

R. W. GLASNER.

DIE CUSHION. APPLICATION FILED MAY 28, 1920.

Patented. Nov. 7 1922.

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3 SHEETS-*SHEET 3.

' and which cushion is adapted tobe readily To azwamam aaea:

i Patented liloy. 7, v I

' TumTE p fjsTATj S" nu nonrn w. eLnsNER, or onrcaea rimmors.

PATENT- DIE cusn'xoit. v

Be "it known that I," RUDOLPH Gmsnnir, a citizen of the United States, residingat Chicago, in'the countyof Cook and State of Illinois, have invented certain new and vusefulImprovements in Die Cushions, of"

I which the following is a specification.

T This invention relates to improvements in die cushions of't he fluid pressure type embodying ycylinder and pistonelements,-

- installed orsecured to a 'die press.

' ployed, a Very large press. is necessary in v order to permit'a cushion of "'sufici'ent size esirable for obvious reasons.

In the'installation of die presses it smstomary- 'to provide under the press a space.

for the cushioning deviee that'is to be em ployed with' .the. press. These, spaces, are very limitedand if ta single cushion is emto beemployed so asfto obtain the desired ressureon the draw rings-and this is no ing the piston'displacement within a'limited area, soas to adapt-ca small press for a greater range of Work which ordinarily requires great pressure; 1 a A still another formof the-invention! I v In the form of the invention asshown side of the piston from whichthepressure;

invention'and-i'n which a To the attainment of 'tii 'slaids and accomplishment of "other new and useful ob' ject's as will appear, .theinyention consists in the features of novelty in substantially the construction, combination-and arrange; ment of theseveralparts,hereinafter more fully described and claimed and 'shownvinthe accomp' yin'g drawingsillustrating this,

Figure l'is a vert1calsectional view are die cushion of this character"showing v same as applied, to a draw pressia'port ontof the draw press being illustrated: in section.

Figure 2- is a view similarfto Figure l of, another formof the 'inven'tionwj 1 1' Figure 3 is a View similartohFigure- 1 ofin Figure 1, the, cushion-embodies two superposed cylinders 10-'-11 secured together, the

end of one cylinder forming the end of the"; other cylinder, each' of the cylinders be1ng' I out of communicationwiththe atmosphere I g v F i forming block 33 and-the draw ring 32. The

on the release side of the piston,ior. on;that

1920. Serial"No."3 4,861.

is released. These cylinders are' supported fin position'in-any suitable manner such as by meanscof a support ,12 secured to any fixed; partoj? the machine by means of suitable su iprting'. elements 13.

Mova lel'n thec 'linder- 10 is a piston 14 rovided with a; flexible and preferably substantiallyicupped'shaped packing 15, and a' similar piston 216 having a. similar pack- ".ing 17 is movable in the'cylinder11-.- I @These' pistons 14: and 16 .are connected together; Bind-held in" a fixed relation with respectto each other by meansof a piston f rod 18one endof whichis secured in any 'suitablemanner'such as by means of a fasteningnut 19;to the piston 1e and the pise ton rod passes through the other-piston 16L The piston rod is'secured to this piston 16 a I in any suitable manner such as by. means of a shoulder-2Q on the rod against which the piston" 16ires'ts'. and a fastening nut or collar 2l is preferably threaded upon the vpiston rod 18,,andc0-op'erates with the shoul v .rod together The piston 'rod 18 passes through; a suitable bushing or s'tufling boir Q22 in the end 23of the. cylinder 11 and exder 20 forv securing; the piston and piston ten ds for any desired distance beyond the end of the cylinders-and issecured in any suitable manner, to av pin plate 24:. The see curing means preferably ernbodiesa bolt 25 whichgpasses.- through the'opposite side of the, pie plate 24::and is threaded as at ,26 into the "end of ,the piston rod 18, the end of the' pisto'n rod being recessed into the i P 21 asat'27." s

v Thefpinplate '24 operatesjipon the pins '28 which latter pass throughabolsterplate- 29 and rests-npon the'pin plate 24.} In order Ito present the. pins 28;*fron'1 dropping out of position when; the pin plate; 24 i's lowered to' the fegtent of its a lowering moyeinent the I pins/28 jmay be .prqvide a with heads 30 adapted to, enter reces es .31 in the bolster i s' oi-t drbythepins 304s 'adraw ring or gripping element 32 which isof'an an nularconstruction so asto-permit aforn ing block or die"33 to positloned upon the bolster plate 29 within the draw ring 32 and so as to permit thefdraw ring to operate adjacent-[the periphery or the iorming-Q draw; ring'132po operates with the die .34 tofv .vices of this character.

grip and hold the material while the material is being formed over the block '33 in the same manner as is well-known in' de:

The piston rod 18 is provided with a paslsageway 35 opening through the lower end thereof and thisv passage extends for any suitable distance into the piston and is provided with radial or laterally disposed discharge outlets 36 which are so positioned that the outlets 36 will always remain open and in such a position with respect to the movement of the piston 16 and the end of the cylinder 11 that fluid which is delivered into the cylinder 10 belowthe piston 14, after having filled the cylinder 10 will flow.

through the passage 35'and be discharged through the outlets 36 into the cylinder" 11 the fluid being supplied through any suitable supply pipe 37, which latter may be cons.

nected with the supply or equalizingtank (not shown). 7 i

A stuflin box 38 may be provided in the end 39-0f t e cylinder 10 and through which stuffingbox the piston '18 passes, an adjust ingnut may be provided for compressing I thepacking in the stufling box.

as be manifest that'the fluidfbeing supplied :into the lower cylinder 10 through the sup- In order that the movement of the pistons will .notbe retarded there may be provided in the cylinder 10-between the head 39' and the piston 14 a ventfopening 41 and a similar vent opening 42 maybe provided in the cylinder 11 between the head 23 and the piston 16.

With this improved construction itwill ply pipe 37 will fill the end of the cylinder and will then pass throughthe-passage 35.. into the cylinder 11' to operate upon the pis ton 16 and thiswill raise the draw ring 32 wardly to" allow the .materlal to be. shaped over the block 33-. [This downward move ment of the drawring32 will through the medium of the'pins 28 force the pin plate 324 downwardly and with it the pistons 16 i and 14 causing-any fluidwhich may be held;

in. the cylinder ll to flow through the opening-36 into'the passage' 35 inthe piston rod f to be-dis'chargedj into thecylinder 10. At the same time any fluid in'thecylinder 10' will be forced/through the pipe 37 back to the equalizing tan-k Figure2 the superp s'ed cylinders 43-44 are movable .while the pistons 45 46' remain .stationaryand to'that end the pistons 45.-46- are connected with the piston" rod 47 having .6.

a passage 48 opening through one end thererod 47 is held stationary in any suitable "54 at one end, the rod passes through the .forms a closure for the open end of the cyl-' "In. the form of the invention shown in.

of and a passage 49 opening through the sides of the piston rod, the fluidbeingsupplied through a supply pipe 50. The piston manner preferably by being connected with a support 51 by means of a suitable fastening collar 52 and which support 51 is anchored to any fixed part of the machine here shown as the bolster plate 29, although it 1s of'course to be understood that this fixed portion. of the machine may be any part of the machine other than the bolster plate. This is accomplished by means of the tie rods or anchoring bolts 53 having heads support 51 so: that the head 54 will rest against one face thereof and the fastening .collar 55 is mounted upon the threads 56- of the bolts or rods53 and clamp. the support 51 between th'ehead 54 and collar 55. The 8. further end "of these rods or bolts, are anchored as at 5,7 by means of a threaded engagement with the bolster plate 29.

The cylinders 43- 44 are respectively provided with flanges 58-59 having opemngs therethrough and through which the bolts or rods 53 pass so that the cylinders will have a free vertical movementupon the rods 0r bolts 53. In this form of the invention the lower end of the cylinder 43 is preferably left open and as the fluid flows through the pipe 50 and passage 48 it will be discharged through the outlets 49 into'the cylinder 43 between the piston 45 and-the head 60 thereof. At the same time fluid \will flow through the open end of the passage 48 to be discharged into the. cylinder 44;between the piston 46 and the head 61 thereof. By

reason of the provision of the open end of the cylinder 43 no vent opening is-necessary L 5 'but the cylinder 44 is provided with a'vent opening 62 between thepiston 46 and the end '60 of the cylinder 43 and which end .60

inder44.. I

- It will therefore be seen that in this form of the'invention-the pistons remain station-v ary while the cylinders reciprocate with respect thereto. and the pin plate maybe dispensed with as the end 61 of the cylinder 44 servesfafs the pin plate forsupporti-ng and operating theipins 28. I j )bviously the cylinders. 43-44'may be connected in any'f'suitable. manner and may,. I

if. desired, be provided with groove connections 6364. x

-In theform. of the invention shown in Figure 3 the cushionis of a construction and tongue and size-as to permit it to be arranged between the bolster plate 29 and the draw ring 32, the formingiblock' 33 being preferably supported by means of the usual shims 65 and {is fastened by means of suitable-bolts 66.

In this form of the invention'there is provided .a' cylinder. 67having anopen end its closed end 68 being secured t o the draw ring 32 in any suitable manner such as by means of fasteningclips 69. The lower cylinder 7 is closed at both ends, one'endthereof tele scoping int the cylinder 67 and operating as a piston within the cylinder 67 and to whichend of "the cylinder is secured a cup shaped element 71v held in position in any I h suitable manner; The cylinder 70 rests upon the bolster plate 29 and is secured thereto in any suitable manner such as by -means offastening clips 72 similar to the clips 69. ;Withl I in the cylinder 70 is a piston 73-preferably provided with a cup shaped washer, or element 74. A pistonirod 75 is secured by one end as at 76 to the piston 73. This piston 80 opening rod passes through a suitable stufling box 7 7 in the end ofthe cylinder 7 0 and extends through the cylinder 67 and is anchored as at 78*totheend 68 of the cylinder 67. 7 With this construction it willbe manifest that the cylinder 67 the piston rod 75 and the piston 7 3- are fixed with respect to each other, the cylinders 70 and 67 being movable relatively one with relation to thevother.

The fluid ,is supplied into the cylinder 70 .by means of a. supply pipe '1 9 which is connected with the supply or equalizingtank or from any suitablesource' and discharges the fluid between the piston 73 and the lower end of the cylinder.""When tliecylinder is filled'the fluid will, flow throu h a passage through the end ofti 7 5 and W111 be discharged into the cylinder 67 through the openings 81 when, the cylinders and pistons are moving with respect to each other infione direction. "When how-- ever the cylinders and pistons are movingin opposite directions with'respect to each other the fluid will be forced \out of the cylinder 67, throughthe openings 81, passage into the cylinderZO and from there the fluid will [be forced through the-outlet pipe 79.

,- be employed andarranged in any suitable position between the bolster plate, and the Obvious'l' I with this formof the invention any suitab e number ofthese cushions may 'draw ring 32.

' and superposed ione'upon the other to meet pressurei,

the existing conditions and inasmuch as the cylinders are superposed the cushion may be arranged'within the, limited space provided under the press for that purpose. Furthermore by superposing' the cylinders and pistonsany-number of elements may be femvployed-thatj are necessary and'fo'r the purpose. of'increasing the piston displacement.

withinalimited area; This arrangement "is advantageous inasmuch as it permits a small press to be adapted for a greater range vwork which;

ordinarily requires great This not always possible to arrange be- With this, improved construction any. suitable number'of cylinders may be alined adapted to be freely attached and detached andlcan be readily applied toany form of machinenow on the market. a

While the preferred forms of the invention have been herein shown-and described,

it is to b'e' understood that various changes may be made in the details of construction and inthe combination and arrangement of the several parts Within the scope of the claims without departing from the spirit of this invention. 1

'- What is claimed as new v I. In combination, a draw press embodya forming block, blank holding means for' h the materialto' be, formed, a fluid pressure cushion acting -on,the said blank holding means, said cushion embodying a plurality of superposed cylinders outof communicationwith the atmosphere on the release side 1 of the piston, piston elements individual to the cylindersQsaid pistons, and cylinders being movable relatively one'with respect to the other, and means connecting one of i the .cushion elements with the said blank e piston rod holding means, another of the cushion elements being connected a fixed sup- Port; w v 2. In combination, a draw press embodying a forming.block,,blank holding means for the material to be 'formed,-a fluid pressure cushion acting on the said'blank holding means, said cushion'embodying a plurality of superposed 'cy linders, piston eletons andcylinders being movable relatively one with respectito the other, means con- .necting one, of thecushion elements with the said blank holding means, another of the cushion elements being connected with a fixed support wherebythe cushion pressure obtained is substantially proportionate to the number of cylinders and afluid equalizing inlet and outlet vhaving commuii'icatlon with the interior of the'cu'shion.

T 3. In combination, a draw press embody- .inga forming block,blank holding means for the material to be formed, afluid pressure cushion acting on the said blank holding means, saidl cushion embodying a-plurality 'ments individual to the cylinders, said pis- I of superposed cylindersiout ofcommunication with the atmosphere on the release side of the piston, piston elements individual to the cylinders, said pistons and cylinders being movable relativelyone with respect to the other, means. connecting one of the cushion elements with" the said blank holding 'means, another of the cushion elements being connected with afixed support, and ya fluid equalizing inlet and outlet, having communication with one of the-cylinders, there being communicating passage ways between the cylinders.

4. In combination, a draw press embodying a formin holding means, said cushion embodying a plurality of superposed cylinders, piston elements individual to the 'cylinders,'said pistons and cylinders being movable rela-- means, said cushion embodying a plurality of superposed cylinders,-piston elements individual to the cylinders, said pistons and cylinders bein'gmovable relatively one with relation to the other, means connecting one of the elements .of the cushion with the said blank holding means, another of the cushion elements being connected witha fixed support, one of said cylinders having a fluid equalizing inletand outlet, and means whereby the fluid may be successively supplied to and removed from-the cylinders.

6. In combination, a draw press embodying a formingblock, blank holding means,

for the material to be formed, a freely attachable and detachable self-containedfluid pressure cushion for maintaining a substan tially unvaryin'g pressure upon the said blank holding means, said cushion embodying a plurality of alined and superposed cyl-' block, blank holding means for the material to be formed, a fluid pres sure cushion acting upon the said blankinders, piston elements individual to the cylinders, said pistons and cylinders being relatively movable one with relation to the I other, and! means connecting one of the cushion elements with the said blank holding means, another of the cushion elements being connected with a fixed support.

7; In combination, a draw press embodying a forming block, blank holding means for the material to be formed, a freely attachable and detachable self-contained fluid pressure cushion for maintaining a substan-' tially unvarying pressure upon the said blank holding means, said cushion embodying a plurality of alined and superposed cylinders, piston elements individual to the cylinders, said piston and cylinders being relatively movable one with .relation to the o o other, means connecting one of the cushion elements-with the said blank holding means, another of the cushion elementsbeing connected with a fixed support, and means whereby the fluidwill be successively delivered 'to and from the cylinders.

8. In combination, a draw press embodying a forming'block, blank holding means for the material to be formed, a freely attachable and detachable self-contained fluid pressure cushion formaintaining a substan'-- tially unvarying. pressure upon the said blank holding means, said cushion embody- [ing a plurality of alined and superposed cylinders, piston elements individual to the cyl-L ,inders, said piston and cylinders being rela-" tively movable one with relation to the other, 4 means connecting one of the cushion ele-" ments with the saidblank holding means, another of the cushion elements belng con,-

nected with a fixed support, and a piston rod connectedwith the piston inone of the -cyl-'v rod extending through the inde-rs, said piston other cylinder;

In testimony ofMay, A,;D. 1920. RUDOLPH GLASNEB.

whereof 'I- have signed my name to this specification, on this 13th day gin.

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