US2491384A

US2491384A - Construction of gib guides

Info

Publication number: US2491384A
Application number: US540723A
Authority: US
Inventors: Howard F Macmillin; Ernst Walter
Original assignee: HPM Development Corp
Current assignee: HPM Development Corp
Priority date: 1944-06-16
Filing date: 1944-06-16
Publication date: 1949-12-13
Anticipated expiration: 1966-12-13

Description

Dec. 13, 1949 H. F. M MlLL lN ET AL CONSTRUCTION OF GIB GUIDES Filed Jun 16, 1944 2 Shets-Sheet 1 Fig] INVENTOR HOWARD F. MAO MILLIN WALTER ERNST BY ATTORNEY Dec. 13, 1949 H. F. M MlLLlN ET AL 2,491,384

CONSTRUCTION OF GIB GUIDES Filed June 16, 1944 '2 Sheets-Sheet 2 Fig. Z

INVENTOR HOWARD F. MAG-MILLIN WALTER ERNST Twit/TM ATTORNEY Patented Dec. 13, 1949 2,491,384 eessmeeim or" die GUIDES Howard F. 'MacMillin and awaits): Ernst, .iMqum Gilead, fihioaassignors to Ji-F-M Deyelgprnent em a o wi ns n Allele .w v afi of Delaware -Application magic, 1944, Serial No:*'540,723 2 blainis. (or. ans-e3 #1 This invention relates to press structures and, particularly, to 'an improved guiding means i for guiding the platen of a pressduring-its-travel.

In the operation of presses, -"particularly in hydraulic presses; it is important that the platen is .i idiea d etul5 ..1 su .e 2 and 3-. Arrange thereof be firmly and "accurately 'Z' guided during its travel to and fromth'e work. 'In'inaliyjtypes of work the platen --is subjected to'unbalanced loads or side thrusts or torques due to' the nature "of the work-piecebeing operated. According-lye it is important .that' the guiding means -for :press platens be of suflicient strength and rigidity ade- "quately to oppose the aforementionedunbalanced thrusts or torques sothat-the'platenmay accurately approach and recede from the'work.

It is the'prim'ary object of this invention-"to provide an improved guiding inean's for -a-press :platen or the like wherein the guiding "means-5s "rigid and readily adjusted.

tor a tuating hexp atien .3- The sp may eomp ise anyi uitebl e tuatice b is shown. i flieurelllto c m ri e a'h dra lical actuated ram l4 suitably aligged tothegplaten, l3.

Theplatm l azisnot hed at itsiou earners as W thin; thepote es l-i r a,eu1 ris lb member 16 which have, a 'beyeledl.suria eithereo :asia

l 1. ad ac t he s de membe s 11. T esidememhers. reater d a w th su ia es l8 thereon wh c are sub tant a y-para l to the. s r ace J 1 Y. er. the eibs l6- ;Preie a ly, ahard ed wear: pla

attach rl' to. th .s ria e l8 andieneases. the

: simi a y finishedsuriwe l on. t e pl tens fllhe lette -p rtion" of the. s adapted to: fitlwithin lithe :notch !5 o as to have a. clearan e th re- It is another object of'this invention to jirovide r2 argund The gib .l fi is located withinth notch i 5 a -platen guiding means for a hydraulic press *platen' or the like including a gib arranged in rigid association "with "the platen 'and a -'g'uidir'ig surface on a stationary niemberinassociation with the gib.

These and other objects will become more apparent upon-reassessed the following description taken in connection with the accompanying drawings, in which:

Fi r i "a ele ati rlalviewoi;a.-hydrau1ic press the platen of which is fitted with thevguiding means of this invention;

Figure-2 isa 'pIan section over 'the platen of the-press of Figure 1 and isi-indicated by .llhfii'lifiG Figure -3 'i S an..en1arge d section through the corner of the platen showing :the gibf'andistationary member of the press which ith'egib engages and is indicated by the line '3i3 :on Fi ure 1; H

I .tF g e 4,- s a. line diagramfillustratingzthedistribution of the forces exerted on the gib;

Figure 5 is a view similar to Figure 3 showing a modified method of adjusting the gib;

Figure 6 is a front view of a portion of a platen fitted with the gib structure of Figure 5; and

Figure 7 is a vertical section through the gib structure of Figures 5 and 6 and is indicated by the line 'l'1 on Figure 6.

Referring more particularly to the drawings, Figure 1 indicates a press structure comprising a head I0, bed II, and side members l2. The head I 0, and the bed II are joined by strain rods I2 which pass through the side members l2.

4 33134 plu a itytq lockin a d d ustin meansizz whi hmay h arnaneed'ae o dinalto astaseered inatter .as indicated Fis- 1.-v, .The adjustin and locking means comprise a hollow screw, ..."lli1:1 hli adc dlxt n as s the gib and abuts. the

et eriof, t e rec ss 1 a d a scr w :Zlw m idealised thmll h t EhQ' QW screw 3. and intosa thr ade hale. n t ema en t3, The headlofiahe pserew fi en a es heihqllow crew 23 and firmly Q.Q 2l latt r in any predetermined position of adju tm nt- M c c .L

W. fief rrinest 'Ei lllle.' ,.fjthe,jaotion v.or ithfiigfll structure of Figures 1 to Biszillustrated, InFigzu te'theplate .l3'maybe assumed tohaveial'sid thrust or a otquelthereon. suohthat ,thegih :16

-i- ..s.-i9r. zed.. sa nst he-Wear plate .19, The counte thrustontheygeaqplate It on thegib [Bis indiarmw emme. d vided in o he h usts indie. arrow 25. .Wh.ic normal ,to the of itheg bL In ,aqcordance with well wnrh siqal wsithe thrust indicated by the .satedbu s r ace. a l

cated by the arrow 26 and the arrow 21. The thrust indicated at 26 is transmitted to the platen [5 through the

surfaces

26 and 2| while the thrust 21 is carried "by the adjusting and locking means 22, the center lines of which are indicated by dot-dash lines.

It will be apparent that the gib it is supported extremely rigidly by the

surfaces

20 and 2| and the staggered locking and adjusting means 22. It will also be apparent that the locking and adjusting means 22 provide for means whereby the gib l6 may be precisely and accurately adjusted relative to the guiding surface of the side Mounted in the head 10 is a suitable power unit 58 member 12.

It will, likewise, be noted that the provision of the mating surfaces 2|! and 2| substantially eliminate torsional or bending effects on the locking screws 24. Therefore, the locking screws, together with the screws 23, may be made appreciably lighter than was heretofore possible. While th locking and spacing means 22 have been shown as staggered across the length and the breadth of the gib l6, they could as well be arranged in alignment if so desired.

Referring now to Figures 5, 6 and '7, a gib structure substantially identical with the structure shown in Figures 1 to 3, inclusive, is illustrated. The gib structure illustrated in Figures to 7, inclusive, differs from the first modification in that the adjusting means for the gib comprises a tapered or wedge shaped member arranged between the gib and the platen.

Referring to Figure 5, the side member of the press is indicated at 30, the strain rod at 3! and "the platen at 32. The side member 30 is provided with a bevel at 33 to which is attached the hardened wear plate 34 which is adaptedto engage the surface 35 of the gib 36.

The gi'o 3B fits within a notch 35 in the corner of the platen 32 and has a machined surface 38 thereon which engages and is contiguous with a similarly machined surface 39 on the platen 32.

Disposed between the gib 3B and the surface 40 of the recess 31 is a tapered member 4! which, upon reference to Figure 7, will be seen to have an inclined surface 42 thereon which engages with a similarly inclined surface 43 on the gib 36. The member 48 is provided with a plurality of slots 44 through which the screws 45 pass into threaded engagement with the platen 32. The

heads of the screws 45 engage shouldered bores in the gib 3G and thereby retain the latter in position. The member 40 may also be provided with an adjusting screw 46 which threadedly engages. either the gib 3B or the platen 32 and is adjustable longitudinally to shift the member 48 so as precisely to adjust the gib 36 relative to the side member 30. It will be apparent that the structure illus-, V, trated in Figures 5 to 7, inclusive, provides for a rigid support of the gib 36 by the platen 32 while permitting the former to be accurately and 'readily adjusted. Also, this structure provides, as in the case of the structure of Figures 1 to 3,

inclusive, supporting means for the gib such that substantially all bending stresses in the screws 45 are eliminated. 1

4 vided with any adequate lubricating system in order to promote the free reciprocation of the platen.

Accordingly, it will be understood that we desire to comprehend such modifications of arrangement and structure and substitution of equivalents as may be considered to come within the scope of the appended claims and the invention.

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

1. In combination, the platen of a press and a guiding gib therefore with a beveled surface adapted to engage a correspondingly shaped guiding surface on the press, a notch in said platen for receiving said gib, a surface on said gib adapted to abut the side of said notch opposite said beveled surface, a tapered wedge member disposed between said gib and the other surface of said notch for adjustably spacing said gib therefrom, and means for locking said wedge and said gib to said platen in any particular position of adjustment.

2. In combination, the platen of a press and the guiding gib therefor with a beveled surface adapted to engage a correspondingly shaped guiding surface on the press, a first fiat surface on said gib adjacent said beveled surface and a fiat surface on said platen parallel thereto adapted to abut said first flat surface on said gib for absorbing thrusts normal thereto, a second flat surface on said gib substantially at right angles to said first flat surface and arranged opposite a surface on said platen, means for spacing said last mentioned surfaces a predetermined amount to permit adjustment of said gib relative to the guiding surface on said press, and a plurality of screws spaced along the length and breadth of said gib and passing through said second flat surface into engagement with said platen for retaining said gib in any particular position of adjustment, the arrangement of the said screws being such that they are subjected to tensional stress only.

HOWARD F. MAcMILLIN. WALTER ERNST.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 359,720 Githens Mar; 22, 1887 1,303,728 Rogatchofi May 13, 1919 1,345,731 Ambrose July 6, 1920 1,653,030 Zeh Dec. 20, 1927 1,959,865 Hatch May 22, 1934 2,195,841 Schlitters Apr. 2, 1940 2,321,741 Flowers June 15, 1943