US2410581A

US2410581A - Hydraulic press

Info

Publication number: US2410581A
Application number: US535620A
Authority: US
Inventors: Relza J Hess; Frank G Cizek
Original assignee: American Steel Foundries
Current assignee: American Steel Foundries
Priority date: 1943-09-13
Filing date: 1944-05-15
Publication date: 1946-11-05
Anticipated expiration: 1963-11-05

Description

Nov. 5, 1946.

R. J. HEss ETAL l 2,410,581

HYDRAULIC PRESS` Filed may 15, 1944 INVENToRs. /e @f i @@3205 gek @LKW/M #ff Patented Nov. 17946l HYDRAULIC PRESS Original application September 13, 1943, Serial No. 502,124. Divided and this application May 15, 1944, Serial No. 535,620

12 Claims.

Our invention relates to presses and more particularly to an hydraulic slugging or briqueting press for compressing material into a slug or brick for manufacturing use. The subject matter of the present application is divided out of a copending application Serial No. 502,124, iiled September 13, 1943, in the United States Patent Oce in the joint names of Relza J. Hess and Frank G. Cizek, for Hydraulic press.

, The general object of the present invention is to design a press in which means is utilized for adjusting the stroke of the main ram which reciprocates within the material cylinder of the press. By this means the head of the main ram is positioned at a predetermined point within the material cylinder, thus predetermining the amount of material which may be inserted therein preparatory to a slugging or briqueting operation.

A more specic object of our invention is the provision of novel hydraulic means for adjusting or controlling the stroke of the main ram as above described. Our invention comprehends an arrangement in which an auxiliary ram extends into the main ram cylinder and abuts the adjacent extremity of the main ram, said auxiliary ram being reciprocal Within an auxiliary cylinder to which hydraulic uid is supplied under pressure for the purpose of adjusting the initial position of the main ram within the main ram cylinder and thereby limiting the stroke of the main ram for the purposes above described.

In the drawing:

Figure 1 is a side elevation, partially in section, of the upper half of a press embodying our invention, and Figure 2 is a side elevation, partly in section, showing the lower half of said press, in combination with a hydraulic circuit for actuating the main ram.

Describing our invention in detail, the press comprises a frame member, generally designated 2, having intermediate its upper and lower extremities an annular support web 4 adapted to support the press upon a foundation fragmentarily indicated at 6. At opposite sides thereof the member 2 is provided with spaced jaws or brackets 8 and In aifording pivotal connection by means of pins I2 and I4, respectively, tothe spaced arms I6 and I8 of the cover link, generally designated 2t, said link comprising a cross piece 22 extending` between the arms l5 and I3 and pivoted thereto adjacent the upper extremities thereof by means of trunnions 25, 25.l

A forming or material cylinder 34 is secured to the member 2 by means of a plurality of tension rods or bolts, one of which is indicated at 35 35 or brick therewithin the associated (ci. is-ie) (Figure l), and a cover 42 is provided for-the cylinder 34, said cover being pivotally connected by means of a pin BE to a lug 48' on the cross piece 22 of the link 2d, said lug having an arcuate surface in thrust engagement at 5i) (Figure 1) with complementary bushing or shoe 5l secured in the top of the cover 42. The cover 42 is connected to the cylinder 34 and is opened and closed by means of the link 20 as shown and describedin detail in said copending application. It willV be understood that, if desired, shims may be utilized at 52 (Figure l) to adjust the height of the forming or material cylinder 311, thus creating any desired initial tension between said cylinder l5 and the cover l2 as the latter is urged to closed position.

Integrally formed Within the frame member 2l is a main ram cylinder 55 within which the main ram or piston 60 is reciprocal by means ofv hydraulic fluid, such as oil, supplied to said cylinder 58 by means of advance and pull-back pipes Gla and lb, respectively, adapted to be connected through a valve casing 63 to a supply line b5 and a relief or exhaust line S1, a valve element 69 being rotatable within the casing 63 `so as to place either of the pipes la or @Ib in communication with the supply line b5 and to simultaneously place the other pipe in communication with the relief line 5l. It will be understood that the valve G3, 69 is diagrammatically illustrated inasmuch as it is a conventional structure. The head 62 of the ram iii) is thus reciprocated within the liner Si! secured in any convenient manner Within the material cylinder 343, to compress into a slug material which is inserted into the top of the material cylinder 34 in the manner hereinafter described.

Our invention comprises novel hydraulic means for adjustably controlling the stroke of the ram 6). To achieve this control, an auxiliary cylinder 66 is mounted by spaced bolts 63, E6 on the lower end or head 'l2 of the main ram cylinder 5S, .and an auxiliary ram 15B is reciprocal Within the auxiliary cylinder 66, the upper end of said ram l!) extending through the head 12 of the main ram cylinder 58 for engagement at M withthe lower end of the main ram ESB. Pressure huid, such as oil, is supplied to the auxiliary cylinder 555 by means of a supply pipe 'l5 equipped with a suitable shut-oli valvev 18.

55. to prevent escape of the actuating fluid from the 2,410,581 Si Y l lower end of the main cylinder 53. Suitable packing means 84 is also provided to prevent escape of actuating fluid from the upper end of the auxiliary cylinder 66.

In operating our novel press, the cover 42 is moved to open position by means of the link 28, and iiuid is then admitted to the auxiliary cylinder 66 through the valve 18 and the pipe 16 until the main ram 60 is moved upwardly by the auxiliary ram 'IB to a predetermined initial position within the material cylinder 34, thus predetermining the amount of material which may be inserted or poured into the top-of the material cylinder. 'I'he lowest initial position of the main ram D is illustrated in solid lines in Figure l,

and the highest possible initial position is illustrated in dot and dash lines in said figure.

When the main ram 60 has assumed the desired position within the press cylinder 34, the

valve 18 is closed. The material to be compressed is then inserted or poured into the top of the material cylinder` 34,.and thereafter the cover is urged to closed position as illustrated in Figure 1. Pressure fluid is .then admitted to the main ram cylinder to urge the main ram upwardly, thus compressing the material within the material cylinder 34.

As will be apparent, any suitable means may be provided, if desired, to evacuate air from the forming or material cylinder, priorto the compressing operation; however, such-means is no part of the present invention and is therefore not illustrated.

, After the material within the material cylinder 34 has been compressed to the desired compactness, the main ram 60 is moved downwardly by means of actuating fluid in the main ram cylinder 58 to release the pressure against the slug and the cover 42, and thereafter the cover is opened and the slug Ais ejected from the upper end of the press cylinder by the ram 60. The main ram 60 is then urged to its lowest and predetermined position against the upper end of the auxiliary ram l0, and the press is ready for another cycle.

Pressure on the main ram 60 as it is urged to .closed position never exceeds the pressure on the auxiliary ram 10, as will be readily understood.

It is to be understood that we do not wish to be limited by the exact embodiment of the device shown which is merely by way'oi illustration and not limitation as various and other forms of .the device will, ofcourse, be apparent to those skilled in the art without departing from the spirit of the invention or .the scope of the claims.

We claim:

1. In an hydraulic press, a material cylinder open at its lower end, a cover for opening and closing the upper end of said cylinder, a main ram cylinder therebeneath, a vertical ram within said main cylinder, a source of hydraulic pressure fluid .connected to said ram cylinder for reciproeating said ram within both of said cylinders, an auxiliary ram cylinder beneath said main cylinder and sealed at all times against communication therewith, an auxilary ram within said auxiliary cylinder positioned to abut with the lower end of said main ram, and a source of hydraulic pressure fluid connected to said auxiliary cylinder for moving said auxiliary ram upwardly to a .predeter-- mined position for limiting the stroke of said main ram. A

2. In an hydraulic press, a material cylinder open at one end thereof, a cover for opening and closing the opposite end thereof, a main ram having a head at one end thereof received within said cylindena main ram cylinderreceiving theopposite end of said ram, a source of hydraulic pressure fluid connected to said main cylinder for reciprocating said ram within both of said cylinders, an auxiliary ram cylinder having a relatively small diameter with respect to that of said main cylinder, an auxiliary ram within said auxiliary cylinder and positioned to abut with said main ram, and hydraulic duid means Within said auxiliary cylinder for advancing said auxiliary ram to a predetermined position for limiting the stroke Yof said main ram, said main and auxiliary cylinders being at all times closed against communication with respect to each other.

3. In an hydraulic press of the class described, a material cylinder, means for closing one end thereof, a ram having a head on one end thereof reciprocal Within the opposite end of said cylinder, hydraulic motor means for reciprocating said ram, a relatively small diameter auxiliary ram positioned to abut with the opposite end of said main ram, and hydraulic motor means independent of said first-mentioned means for urging said auxiliary ram against said main ram in the direction axially thereof and thereby moving said head to a predetermined point-within said cylinder for predetermining the amount of material which may be inserted within the first-mentioned end thereof.

4. In an hydraulic press of the class described, a material cylinder, means for closing one end thereof, -a ram having a head on one end thereof reciprocal within the opposite end of said cylinder, hydraulic motor means for reciprocating said ram, a relatively small diameter pistonlike member positioned to abut with the opposite end of said ram, and meansat all times independent of said motor means for moving'said memberY toward said material cylinder and .therebylmovin'g said head to a predetermined point within said cylinder for predetermining the amount of material which may be inserted within said iirst-mentioned end thereof.

5. In an hydraulic press ofthe class described, a material cylinder, a main ram having a head at one end thereof received within said cylinder, a main ram cylinder receiving the opposite' end of said ram, a source of pressure iluid connected to said main cylinder' for reciprocating said ram within both of said cylinders, .a relatively'small diameter auxiliary ramV cylinder, an auxiliary ram within said auxiliary cylinder positioned to abut with said main ram and separable therefrom, and hydraulic fluid means within said auxiliary ,cylinder for advancing said auxiliary ram to a predetermined position, thereby limiting the strokev of said main ram Within said material cylinder, said main and auxiliary cylinders being at all times sealed against intercommunication,

inders, a relatively small diameter pistonlike member extending into said cylinder and positioned -to abut said opposite end, and means en-A tirely independent of said rst-mentioned means for advancing said member into said ram' cylinder axially thereof, thereby limiting the stroke ofsadram.

7. In an hydraulic press, a main ram cylinder, a main ram therewithin, hydraulic vfluid 4means for reciprocating said ram Within said cylinder, a relatively small diameter auxiliary vcylinder spaced from said first-mentioned cylinder, an auxiliary ram in said auxiliary cylinder, hydraulic fluid means for reciprocating said auxiliary ram within said auxiliary cylinder, the adjacent ends of the respective rams being positioned to abut with each other, whereby the stroke of said main ram is limited by the position of said auxiliary ram, said main and auxiliary cylinders being at all times closed against intercommunication.

8. In an hydraulic press of the class described, a material cylinder open at one end thereof, a cover for opening and closing the opposite end thereof, a ram having a head at one end thereof received Within said cylinder, a ram cylinder receiving the opposite end of said ram, hydraulic uid means in said ram cylinder for reciprocating said ram within both of said cylinders, and an auxiliary hydraulic device entirely independent of said means and operatively connectable to said main ram for limiting the length of its stroke Within said ram cylinder.

9. In an hydraulic press of the class described, a material cylinder, a ram having a head on one end thereof reciprocal within said cylinder, hydraulic motor means for reciprocating said ram, a relatively small diameter auxiliary ram positioned to abut with the opposite end of said main ram, and hydraulic motor means entirely independent of said inst-mentioned means for urging said auxiliary ram against said main ram and thereby moving said head to a predetermined point within said cylinder.

10. In an hydraulic press, a .cylinder open at both ends thereof, a cover for closing one end of said cylinder, a ram reciprocal Within the opposite end of said cylinder, means for reciprocating said ram, and an auxiliary hydraulic device independent of said means and including a ram member engageable with said first-mentioned ram for adjustably controlling the stroke thereof.

11. In an hydraulic press, a main ram cylinder, a substantially vertical main ram reciprocal therewithin, an auxiliary ram cylinder, an auxiliary ram in said auxiliary cylinder, the upper end of Said last-mentioned ram being positioned to bear against the lower end of said main ram for limiting the stroke thereof, and a source of pressurefluid connected to each cylinder independently of the other for actuating the associated ram.

12. In an hydraulic press, a main ram cylinder, a main ram reciprocal therewithin, an auxiliary ram cylinder, an auxiliary ram in said auxiliary cylinder, said last-mentioned ram being positioned to bear against said main ram for controlling the stroke thereof, and means for actuating each ram independently of the other ram comprising a source of pressure uid connected to each cylinder, each of said cylinders being at all times closed from communication with lthe other cylinder.

RELZA J. HESS. FRANK G. CIZEK.