US1259573A

US1259573A - Manufacture of bilged metallic barrel-bodies.

Info

Publication number: US1259573A
Application number: US7370516A
Authority: US
Inventors: Herman Williams
Original assignee: Individual
Current assignee: Individual
Priority date: 1916-01-22
Filing date: 1916-01-22
Publication date: 1918-03-19
Anticipated expiration: 1935-03-19

Description

QW E D 0 B L EL R R A B C SU. MA AH UM .MILD .WE G .H HB F o .E R U T.. C A rr U N, A M

APPLICATJUN FILED )AN.22, 1915.

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wma/WM) Patented Mar. 19, 1918.

2 SHEETS-SHEET 2.

F I G E- H. WILLIAMS.

MANUFACIURE 0F BILGED METALLIC BARREL BODIES.

APPLICATION FILED IAN- 22. I,9I6.

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'lili den srerrns PATENT OFFICE.

IEBMN WELIIEAMS, 0F HOMSTEAE, PENNSYLVANIA,

MNUFACTRE GF ISLGEI'I METALL-BARREL-BODIES.

To all whom it may concern.

Be it known that l, HERMAN W'iLLIAMs, e citizen of the United States, resident of Homestead, in lthe county of ilieglieny end State of Pennsylvanie, have invented certain new and useful Improvements in the 'Menufecture of Bilged Metallic BerreLBodies, of which the following is a specification.

This invention relates to the manufacture of hilged barrel bodies from metal of suitable gage, and the primary object is to so displace the metal incident to forming the loilge es to distribute it uniformly througiim ont the oilged portion. ai l the one lrling or crimping tendency eo. monly eX- perienced, particularly at or scent the marginal portions of the sheet. The new method herein involves e. manipulation wherein all portions of the sheet or plate are placed under tension during the forming opn eration, there being no opportunity for the creation of Compression strains which are immediately responsible for the appearance 0f crimps or laps in the bilged bodies.

It is further characteristic of the iin-'enm tion that in forming the hilge the metal is displaced in e direction transversely of the sheet, e., longitudinally of the barrel body, there being a relatively smell ernennt of placement lengthwise oit' the sheet. By this means the stretching and oonseenent thinning of the metal: is distributed 'oniforn'lly throughout. the sheet, with all portions therew of of substantially uniform strength.

In the preferred practice, the fet plete is eurved to fit within. thel curved marginal portion of bed or press, the leed inter-meu diete its marginal portions being depressed in conformity with the hilge to he imparted to the'plate. After tightly securing the margine of the positioned plete so that there can be no slipping or bodily displacement in any direction', e. portion of the plate, preferably a part located intermediate its ends, 1s

pressed into the bilge-forming cavity of .the body by means of a former or die element which conforms tol such depression. This result' is produced primarily. by stretching the mete-l tiensversel of the plete, and the portion thus shape is securely held or clamped by the forming element, thereby placing endmenteining all of the remainn1 der of the plate under tension. Such re- 'A maning portions are then'I pressed into full conformity with the bed depression, and

with the metal Linder tension end with. no

Specification of Lettere Patent.

.application filed January 22, 3.316. Serial No, 73,705. i

opportunity for compression sti-eins to develop, the result is e uniformly bilgen plate from which kinks or laps ere totally absent. rl`he hilg'ing operation which follows initial ressing of the blank is preferably accomplished by the combined pressing end rolling action of die-like formele having faces shaped llconlplelnentary with the lleed depres` sion, such forming opera-tion proceeding progressively from the initially pressed ortion to the ends of the blank hy a. rol. ing or ironingpot action which expands the sheet principally in the direction of its width or longitudinally of the length. of the borrel body, thereby eliminating such plate deformations as may result during the ini-- tial pressing from placing the motel under tension, and completing the bilging operetion. A

Apparatus for practising the invention is illustrated in the accompanying drawings,

Figure l being n side elevation of a desireloleA adaptetion thereof. Fig. 2 is e vertical cross-section on line 2-2 of Fig. 1. Fig. 3 is a sectional plan on line 3-3 of Fig. l.

e is a bottom' plan view of the die elements which cooperate with the recessed base of the press. Fig. 5 is e central vertical seew tion of 'the press, tl e central die element losing shown depressed for accomplishing the preliminary pressing of the plate, end and 'Y illustrate the blank at the comple tion of the preliminary pressing operation. Fig. 8 is e view similar to Fig. 5 showing the die elements fully expended as et the completion of the linge-forming operation,

and Figs. 9 andl-are detail views of the fully bilged blank. Fig. 11 is a View of the bilged blank after it has been vrolled 0r curled into body forno.

Referring to the drawings, 2 designates the bed or base portion 0f the press, the top surface thereof formed with the downwardly `curved depression, and this depression Within its marginal portions is dishednor recessed at 4 in conformity with the curva-- ture of the bilge to be imparted to the plate or sheet A. This sheet is curved toit wlthin depression 3, with its marginal side portions a resting on the curved margins of depression 3, and with the ends b' ofthe blank.' bearing downwardly on top of base 2 at opposite ends of depression 3. If desired, bed 2 may be in the form of a magnet for retaining the plate in proper position preceding the securing of the plate margins.

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is depressed in conformity with the bilge to he imparted to the sheet, then immovably holding the longitudinal edges of the sheet and progressively bilging the sheet from at or near its center outwardly to the opposite ends thereof.

2. A method of producing bilged barrel bodies consisting in confining a metal sheet to prevent contraction thereof, and stretching the sheet in the direction of its Width or longitudinally of the ultimate barrel body with such stretching proceeding progressively'throughout the length of the sheet.

3. A method of producing bilged barrel bodies consisting in confining the marginal portions of a metal sheet to prevent contraction, and stretching the sheet in direction longitudinally of the ultimate barrel body.

with such stretching imparted initially to a portion of the sheet and proceeding progressively from such initial portion throughout the length of the sheet.

4. A method of producing bilged barrel bodies consisting in confining the marginal portions of a metal sheet to prevent contraction, subjecting a portion of .the sheet to bilge--forming pressure in a direction longitudinally of the ultimate barrelbody and thereby placing under tension the-remainder of the sheet, vand bilging such remainder by pressure applied subsequently to said initial bilging.

5. A method of producing bilged barrel bodies consisting in conning the marginal portions of a metal sheet to prevent contraction, subjecting a portion of the sheet to bilge-forming pressure in .a direction longitudinally of -the ultimate barrel body and thereby placing under tension a portion of the sheet between such bilged. portion and the confined blank margins, and bilging the remainder of the sheet by a progressive rolling action proceeding from said bilged portion to the extremity of the blank distant therefrom.

6. A method of producing bilged barrel bodies consisting in curving a flat sheet of metal in the direction of its length,-conlin ing the curved sheet at all of its margins andthereby forestalling contraction, exerting bilge-forming pressure on a portion of the sheet in direction longitudinally of the ultimate barrel body and thereby placing the remainder of the marginally held sheet under tension, and deforming such remainder by a rolling bilge-forming pressure proceeding progressively from said initially bilged portion to the conned margin of the sheet distant therefii'ttf.

8. A method of producing bilged barrel bodies consisting in placing a sheet of metal on a form that is curved longitudinally of the sheet and bilged transversely thereof, confining the marginal portions of the sheet against contraction in anyj direction, placing a portion of the sheet located intermediate its ends under deforming pressure and thereby conforming said portion to the bilged form with such deformation placing the portions of the sheet at opposite sides thereof under tension, and forcing such portions'under tension into engagement with the bilged form by pressure proceeding progressively .and in 'opposite directions from said initially bilgedl portion to the conlined sheet ends.

9. The methodof producing bilged barrel bodies which consists in semi-cylindrically curving a metal sheet and formin thereon projecting end flanges, in placin t such curved sheet over a bilged form or 'e and holding its marginal edges against displacement, then forcing said sheet into the die so as to initially bilge it at or near its mid position between said flanges then bilging the remainder of the sheet from said initially bilged portion in a progressive mannerI to said end flanges.

In testimony whereof I aix my signature ELLA MGCONNELL.

jrpgressively `from said initially bilged portion to the margin of the