US2428620A

US2428620A - Press structure

Info

Publication number: US2428620A
Application number: US503820A
Authority: US
Inventors: Ernst Walter; Richard M Norman
Original assignee: HPM Development Corp
Current assignee: HPM Development Corp
Priority date: 1943-09-25
Filing date: 1943-09-25
Publication date: 1947-10-07
Anticipated expiration: 1964-10-07

Description

Oct. 7, 1947. w. ERNST Er Al.

PRESS STRUCTURE Filed Sept. 25. 1943 N mm.

ATTORN EY.,

Patented Oct. 7, 1947 UNITED STATES IPATENT OFFICE PRESS STRUCTURE Walter Ernst and Richard M. Norman, Mount Gilead, Ohio, assignors to H-P-M Development Corporation,`a corporation o! Delaware Application september 25, 1943, serial No. 503,820

1 claim. (cl. 10o-'11) This invention relates to press structures.

An object of the invention is to provide a. press structure wherein pressing forces are arranged angularly with respect to one another so that the pressing forces tend to hold thefpress structure together.

Another object of the invention is to provide a press structure wherein a plurality of rams operate angularly with respect to one another, and wherein the press structure is interlocked in such a manner that the pressing forces developed by the rams increase the pressure between the locking surfaces of the structure.

Another object of the invention is to provide a press structure wherein the press head and press base are dovetailed together through means of dovetail joints on nprights positioned between the press head and press base, and wherein the uprights of the press structure form the press head and press base of a press that operates angularly to the irst mentioned press head and press base.

Still another object of the invention is to provide a press structure in accordance with the foregoing object wherein one of the presses is a vertical acting press while the uprights function` as the elements of a horizontal acting press.

Still another object of the invention is to provide a more rigid press structure that will substantially eliminate the misalignment of the press frame wherein the press is provided with rams acting angularly with respect to one another.

Further objects and advantages will become apparent from the drawings and the following description.

In the drawings:

Figure 1 is a'front elevational view of a press constructed in accordance with the invention, having a part thereof broken away to illustrate a connecting tie or strain rod.

Figure 2 is a side elevational view of the press structure illustrated in Figure 1.

In this invention the press structure consists of a press base III and a press head I I. The press head II is provided with a dovetail recess I2 that extends across the bottom surface I3 of the press head II. The press base I is provided with a similar dovetail recess I4 that extends across the upper surface I5 of the press base I0. y

The press head II and the press base I0 are connected by means of vertical uprights or side members I6 and I'I that are substantially solid members extending across the depth of the press head and base, as illustrated in the side view of Figure 2. The upright I6 is provided with a cooperating dovetail connection I8 that engages one side of the dovetail recess I2 in the press head II, and with a similar dovetail connection I9 that engages one side of the dovetail recess I4 in the press bed III. The upright Il is provided with similar dovetail connections I8a and I9a that co-operate with the opposite side of the dovetail recesses I2 and I4, respectively.

It will thus be seen from Figure 1 that with the uprights I6 and I1 in position, the press head II and press -base Il) will be interconnected and be spaced relatively to one another in suitable i manner for providing a vertical acting press struc-` ture.

Tie rods or strain rods 20 extend through the press head II, the uprights I6 and I'I and the press' hase I0 to secure the same together, suitable nuts 2I being provided on opposite ends oi the strain rods 20 to retain the press structure together. The vertical tie rods 20 are preferably prestressed when the nuts 2 I are tightened to a tonnage substantially greater than that which will be developed by the vertical acting press.

The press head II is provided with a conventional ram 22 that operates in a cylinder 23. The ram 22 may be of the single acting or double acting type as desired. The ram 22 thus moves vertically toward and away from the press bed I0 during reciprocation thereof when the ram is operated. A suitable fluid pressure system may be provided for supplying fluid under pressure to the cylinder 23 for hydraulically operating the ram 22.

'Ihe vertical upright I6 carries a cylinder 24 in which a ram 25 operates. The cylinder 24 is also suitably connected to the hydraulic system for the press for reciprocating the ram 25 therein. It is to be understood that any of the conventional hydraulic systems and controls for the same can be used to produce reciprocation of the

rams

22 and 25 in their

cylinders

23 and 24, respectively.

From the foregoing description it will thus be seen that the ram 22 is a vertical acting ram and that the ram 25 is a horizontal acting ram so that the forces applied by these rams to the press structure during operation thereof are at right angles to one another. In effect, therefore, the press structure has two heads consisting of the head II for the vertical acting ram 22 and the upright or head I6 for the horizontal acting ram 25. Similarly the press has two beds consisting of the bed I0 for the vertical acting ram 22 and the upright or bed II for the horizontal acting ram 25. With the forces of the two

rams

22 and 25 acting angularly to one another, it will also be apparent that the forces developed by the rams will tend to more tightly bind the dovetail f connections between the uprights I6 and I1 and the recesses I2 and I4. The force tending to separate the head II from the bed I will be opposed by the force tending to separate the head I6 from the' bed I1, the dovetail joints oril the head upright I6 and the bed upright I1 being forced outwardly against the dovetail recesses I2 and I4. This thereby binds the dovetail surfaces together and provides for a very rigid construction.

A suitable support 26 can be provided for the purpose of supporting molds or dies of a suitable character that can be retained together by means of a pressure applied by the plunger 21 carried by the ram 25, the plunger 21 forcing the mold or die together against the support member 28. A suitable plunger or forming member 29 can be carried by the ram 22 to produce a work operation upon material placed within the mold or die held by the ram 25. Itis, of course, understood that the type of work accomplished upon the press may be varied over a wide range de pending upon the type of dies and plungers positioned in the press.

While the apparatus disclosed and described herein constitutes a preferred form of the invention, yet it will be understood that the device is capable of mechanical alteration without departing from the spirit of the invention, and that al1 such modifications as fall within the scope of the appended claim `are intended to be included herein.

Having thus fully described our invention what we claim as new and desire to secure by Letters Patent is:

A multiple ram press that includes, a press head having a ram operable therein, a press bed, an upright on each side of said press extending 4 between said head and said bed, one of said uprights having a ram operable therein and movable in a direction toward the other upright and atfright angles to the movement of the rst ram. strain rod means extending between said head and said bed for connecting the same and for carrying the thrust of said first ram, a dovetail recess in each of the confronting faces of said head and said bed providing inclined surfaces and surfaces which are perpendicular to the line of thrust of'said rst ram, said inclined surfaces being inclined angularly toward the central portion of the press, said uprights being each provided with a dovetail connection at each end thereof providing inclined surfaces and surfaces which are perpendicular to the line of thrust of said first ram, the inclined surfaces of said head and bed being in engagement with the inclined surfaces of said uprights and said perpendicular surfaces of said head and bed being in abutting relationship with said perpendicular surfaces of said uprights, whereby the forces of the two rams acting angularly to each other will develop forces tending to bind tightly the dovetail connections between saidvuprights and said bed and head.

WALTER ERNST. RICHARD M. NORMAN. REFERENCES CITED The following references are'of record in the fileof this patent:

UNITED STATES PATENTS