US3213739A

US3213739A - Fluid actuated press

Info

Publication number: US3213739A
Application number: US307648A
Authority: US
Inventors: Anthony E Zingone
Original assignee: Neo Ray Products Inc
Current assignee: Neo Ray Products Inc
Priority date: 1963-09-09
Filing date: 1963-09-09
Publication date: 1965-10-26
Anticipated expiration: 1982-10-26

Description

Oct. 26, 1965 A. E. ZINGONE FLUID AGTUAIED PRESS 5 Sheets-Sheet 1 Filed Sept. 9, 1963 INVENTQR Zl/VGONfi ATTORNEYS Oct. 26, 1965 A. E. ZINGONE FLUID ACTUATED PRESS 3 Sheets-Sheet 2 5 4 55 ATTORNEYS Filed Sept. 9, 1965 United States Patent 3,213,739 FLUID ACTUATED PRESS Anthony E. Zingone, Massapequa, N.Y., assignor to Neo- Ray Products, Inc., New York, N.Y., a corporation of New York Filed Sept. 9, 1963, Ser. No. 307,648 4 Claims. (Cl. 83563) This invention relates to industrial presses operative by means of a fluid either liquid or gas.

One object of the invention is to provide a fluid actuated press the die supporting members of which will be under uniform stress in work load position regardless of the number, location or character of the die elements thus effectively minimizing any distortion, flexing or even possible rupture of these members. In general this is achieved by a mechanical feature of design which serves to insure uniform distribution under high fluid pressures of the load across the entire area of the members under stress conditions even though actual work is being performed at only one or two points on their operating surface.

One of the principal die support members, according to the invention, is a platen which is formed into two parts, one part being fixed to the base of the press and the second part being displaceable in the direction of the work. Fluid pressure is provided by a chamber formed internally of the platen or as a flexible joint on its periphery. The movable platen member is provided with internal limit stops disposed in slots located at frequent intervals within the platen which effectively eliminates the need for the usual platen reinforcement to prevent flexing and distortion under high stress.

Other objects and advantages of the invention may be apparent on reading the following specification which is taken in conjunction with the accompanying drawings, in which:

FIGURE 1 is a side elevation of the press and die setup table with certain parts broken away for clarity;

FIGURE 2 is a plan section taken on line 2-2 of FIGURE 1;

FIGURE 3 is a transverse section on enlarged scale taken on line 3-3 of FIGURE 2;

FIGURE 4 is a longitudinal section on enlarged scale taken on line 44 of FIGURE 2 showing a detail of the fixed and movable platens;

FIGURE 5 is a section similar to FIGURE 4 With the movable platen in operative position;

FIGURE 6 is a section showing a modification of the invention.

Referring to the drawings, it is seen that the press has a base 10 having vertical ears 12 at each corner and a top frame member 14 also having corner ears 16. Posts 18 are disposed in upper and lower complementary ears and are screw threaded to receive clearance adjusting, hexagonal nuts 20 above and below each car. It may be seen that the nuts 20 on being vertically positioned by turning on the posts will cause the base and frame member to separate or draw closer to each other thus providing greater or lesser clearance between these members and certain fixed elements below described which are disposed therebetween.

As shown in FIGURE 4 a lower or fixed platen 21 is supported atop the base 10 being immediately carried on a base plate 22 which by means of bolts 25 extending therethrough and clamps 26a partially overlying lateral extensions of the platen 21 serves to fixedly retain the latter on the base. Movable platen 24 is disposed on top the lower platen with the sides flush. Each platen is provided with communicating T slots 26 in which there are disposed alternate tension springs 28 and platen guide and stop bars 30. The T slots extend from side to side as shown in FIGURE 3 and communicate with peripheral ice air chamber 34 fabricated of flexible sheet steel or the like. The air chamber is semi-circular in cross section with one side thereof connected by screw attachment to lateral extensions on the movable platen 24 and its other side similarly connected to the lateral extensions on the lower platen. Seals S are provided between the platen extensions and the chamber which are made somewhat tighter, as it may be appreciated, as the chamber is outwardly flexed on separation of the two platen halves.

The lower platen 21 is provided preferably with an air passage 36 at four points proximate two opposing sides, see FIGURE 2, such passages communicating with the flexible air chamber 34 and a source of constant fluid pressure by vertical tubes 38, transverse pipes 40, a central, longitudinal pipe 42 and a pipe 44 controlled by a valve 45.

A die carriage 46 having transverse T slots 48 formed therein is normally fully supported by wheels 50 which are adapted to run on tracks 52 carried by the base plate 22. The wheels 50 are supported at the end of pivot arms 54 which are pivotally connected to vertically displaceable links carried by the die carriage 46 and adjustable stops 55 which limit the upward movement of the arms 54.

The tracks 52 extend the length of the base 10 and also that of table 56 which is used to support the die carriage when the dies are being positioned thereon during set up. To this end there is provided a carriage screw 58 which is axially turned by motor M through drive chain 60. The screw 58 is supported centrally underneath the carriage by a bearing block 62 mounted at one end of the table 56 and in the threaded aperture of a member 64 depending from one end of the carriage 46.

The dies may be of any conventional type and, as shown, comprises a horizontal U shaped member having flexible arms carrying at their free end upper and

lower dies

66 and 68, respectively. Secured to the lower arm is a pair of screws 69 the heads of which are adapted to be disposed in any one of the T slots 68 in the carriage 46 for longitudinal positioning of the dies and to slide within the slots for transverse positioning for a lateral set up. As mentioned above, the positioning of the die elements is effected as desired when the die carriage has been moved out on the table 56 for set up.

In operation a sheet metal work piece W is placed between the die elements and supported on the upstanding elements 70 on the carriage. When the fluid is admitted to the chamber 34 and thence to the transverse T slots formed internally of the platens, the latter separate as the chamber itself is flexed until the stop bars 30 strike the bottom and top, respectively of their longitudinally formed slots, see FIGURE 5, at which point the carriage 46 has been raised so as to depress the upper die element 66 so as to punch, for example, a selectively designed and located cut out in the work piece W. When the fluid pressure is turned off the internal springs 28 assist in re turning the upper platen to its normal position. However, when liquid is the actuating fluid, the platen may be returned to its original position by evacuation with a pump to eliminate thereby the necessity of springs.

In the modification shown in FIGURE 6, fluid is introduced directly into internal passage 70 within the lower, fixed platen 21a from a source not shown. An annular fluid chamber 71 in the displaceable upper platen 24a receives the fluid from the passage 70. In this version, there is provided a plurality of bores 72 in each of which there is disposed a shoulder bolt 74 having on one end a metal stop washer 75 which on upward movement of the platen 24a strikes shoulder S formed in the bore 72. Preferably a compression spring 76 is provided in each slot extending between the washer and the bottom of the slot to assist the return of the platen to the position shown in FIGURE 6. The other end of the bolt extends through a central aperture in the bottom of each bore, there being a threaded extension member 78 depending from the bolt which is screwed into the fixed platen 21a to insure relative movement between the bolt and the platen 24a when the latter is displaced. At the top of each slot is a screw plug 80 which rests on spacer head 82 of the bolt which retains the metal washer 74 in each slot to provide a slight spacing between the platen members 21a and 24a in their closed or normal position.

Proximate the periphery of the platen is formed a pair of complementary annular grooves within which are disposed spaced apart and

annular metal shields

84 and 86. In this space between the shields is disposed an elastic material 88, such as rubber neoprene or teflon which is subject to a natural elongation greater than maximum displacement of platen 24a serving as thus confined in the annular slot as an elfective pressure seal for the fluid.

In either embodiment of the invention as herein above described, it is important to note that the internal limit stops are located at frequent intervals within the platen members, the number depending on platen thickness and maximum pressure, to eliminate reinforcement of the members which would otherwise be necessary to prevent their flexing and possibly permanent distortion.

Other modifications of the invention may be efiected by persons skilled in the art without departing from the scope and principle of invention as defined in the appended claims.

What is claimed is:

1. In a fluid actuated press a lower fixed member, a moveable member overlying said fixed member, there being provided internal slots in said members, said slots being shouldered, stop elements disposed in said slots adapted to bear on the shouldered portions of said slots and a flexible fluid chamber communicating with said slots, one part of said chamber being secured to said fixed member and another part being secured to said moveable member.

2. In a fluid actuated press as defined in claim 1, member return springs disposed in said slots.

3. A fluid actuated press a lower fixed member, a moveable member overlying said fixed member, there being provided internal slots in said members, said slots being shouldered, stop elements disposed in said slots adapted to bear on the shouldered portions of said slots and a flexible fluid chamber communicating with said slots, one part of said chamber being secured to said fixed member and another part being secured to said moveable member, a die carriage supported on said moveable member, an upper frame member supported over said carriage, a die removably secured to said carriage and having an upper die element arm adapted to strike said frame member as the press is opened.

4. A fluid actuated press as defined in claim 3 wherein said carriage is T slotted with a lower die element arm of said die disposed in a selected pair of T slots in said carriage for transverse positioning therein.

References Cited by the Examiner UNITED STATES PATENTS 2,363,779 11/44 Dufly 269 2,717,421 9/55 Beeson 100269 2,869,173 1/59 Van Hartesveldt 100269 2,997,083 8/61 Pfefer 100269 3,111,100 11/63 Georgeff 100299 3,134,350 5/64 Danly 100299 FOREIGN PATENTS 467,952 6/37 Great Britain.

WILLIAM W. DYER, JR., Primary Examiner.

ANDREW R. JUHASZ, Examiner.

Claims

1. IN A FLUID ACTUATED PRESS A LOWER FIXED MEMBER, A MOVEABLE MEMBER OVERLYING SAID FIXED MEMBER, THERE BEING PROVIDED INTERNAL SLOTS IN SAID MEMBERS, SAID SLOTS BEING SHOULDERED, STOP ELEMENTS DISPOSED IN SAID SLOTS ADAPTED TO BEAR ON THE SHOULDERED PORTIONS OF SAID SLOTS AND FLEXIBLE FLUID CHAMBER COMMUNICATING WITH SAID