US1534299A - Corrugation-forming die for metal plates - Google Patents

Description

April 21, 1925..

W. M. CONNERY CORRUGATION FORMING DIE FOR METAL PLATES Original Filed Dec. 21, 1921 2 Sheets-Sheet l Il lmlllHllllllllllllllllllllll 4 April 21, 1925. v

W. M. CONNERY conmm'rron FORMING DIE FOR METAL PLATES Origifial Filed Dec. 21, 1921 "2 Sheets-Sheet 2 v 3 vwentoa I W542 17!. 652272 5 of providing means for stiffening thick steel plates against pressure of any kind. In fact the desire is to provide a strong stiffener and at the same time maintain a uniform section throughout the length of the plate, and one which will uniformly expand and contract.

It is well known that if the sloping or other shaped walls of the corrugation or indenture are fluted, the fluted portions would detract fro-m the value of the corrugation as a stiffener. 'Furthermore as previously stated the metal used averages substantially {t -of an inch in thickness, which is entirely too stiff or thick to be fluted within the confines of the relatively small indenture, which is designed to be made by the presentform of die-s or forming machines. In fact the complete indenture or corrugation is the resultant of three separate and distinct bends arrived at by one stroke of the forming machine. The (lies in the present case are so proportioned that there is no drawing affect such as is the case in the ordinary commercially known corrugated plate. In forming the corrugation or indenture, the central bend is made at the same time the projection or center die enters the cavity of the other die, whereas the other two bends are made simultaneously, during the last portion of the downward stroke of one of the dies. It has been found impossible with the strongest bending or forming machine to draw a 1 K metal plate over and into the female die in a manner similar to the cor- .rugating of relatively thin sheet metal plates, which as before stated are commercially known as corrugated sheets.

It is well to remember that there are three separate bending processes involved in making each indenture, and it will be noted that all of these bends are caused to be formed upon one stroke of one of the dies.

It is also known that the slopingor other shaped sides of the forming faces of the indenture and projection of the opposed dies approach one another as close 'as is practicable. and during the approach of these walls the corrugation or indenture is formed in a relatively thick Uheet metal plate. with sloping or other shaped walls. which are perfectly straight. and due to the deformed faces of the in'denture and projection on the opposing faces of the dies, con'ipensation is made for the varying thicknesses of the sheet -1i'1etalplates. In fact the varying thicknesses of the plate are allowed to'enter the deformities or irregular walls of the indenture and the projection on the dies, in order to prevent jamming or breaking of the form- 111 12 machine.

The indentures or corrugations to be that have heretofore been riveted to the plates, and it is also important to note that the indenture or corrugation represents the angle or beam, which permits, as nearly as possible. to oppose the direction of stress and in a line with the direction of stress. in order to not only reinforce the plate but also to permit the plate to uniforn'ily expand and contract.

The plates which are to he corrugated or provided with indentures of the present character, by the use of the forming dies herein shown. are used in the construction of bins or tanks. or fines or flue sections. conduits or conduit sections. or other ducts. and the various plates for such work may average six feet by ten feet. n'iore or less. with stiffeners or corrugations disposed to extend with the length of the plates.

As previously stated all relatively thick sheet metal plates do not vary alike. variation in thickness alone is greater than the total thickness of any commercial plates which are corrugated. For this reason it is the purpose of the present invention to provide forming dies, with interengaging projections or indentures with deformed faces. in order to take care of the varying thicknesses of the plates. It is well established that 'dies and the metal to be formed cannot come together in one solid pack, unless plates are aliisolutely true and of a uniform thickness throughout their area. which never the case.

The deformed or fluted dies permit. without altering the adjustn'ient. the forming of the indentures or corrugations in the plates. though varying in thickness. the main purpose of such forming dies is to avoid breaking of the machine or jamming of the parts. i'\dditionally it is the aim to avoid the producing of a fluted product. and this is done by using dies. wherein their interengag ng projection or depression have deformed or fluted walls.

The present form of die may be any length whatever. and in some instances it may be found most convenient to'use a number of short dies. and in other cases it may be possible to use one long die up to the capacity of the forming machine.

It is most important to note that the deformed walls of the projection and depression provide a suitable clearance. to compensate for the varying thicknesses in the plates. thereby llll'lltlllQ any possibility of jamming the operative parts of the forming machine. and also preventing breaking of the machine.

' It is to be understood that the particulars herein given are in no way limitative and that while still keeping within the scope of the invention. any desired modifications of detail and desired proportions may be made in the apparatus according to circumstances.

The

The invention comprises further features llll llll) lle i Figu i'efh a Sectional Figuife 6 f male fend} fem ale dies, shive ing aflihbdified folfmingdies,constructedinaecerdaneeqvith t plat offthewalle of the projeetien 6 andihe fie pressienbf 'the" female die, and are disposed purpose of receiving or compensating for the varyilig thickneesesin thefsheet metal plates, l which "are pressed between the 'dies. In feet (the alternate depressions mayQbegrienned aeY siofn *ofthe female die may varvin ebnteulfu 1 in Figureef1 te8 inclusive and Fig: I ure 5fmayeonverge 1nwardlv and upwardly;

"whieh jreieurvedin cross eeetion In fact epm jensate for the} vaying fthieknessejs of I f 5 the plate whichgirefdesignediobe pressed m into the curved surfaces 10. The cavity 5 in Figure 8 is not engaged by the plate to be formed with a corrugation. However the plate is drawn over the curved corners 8 and furthermore when forming the plate with a corrugation by means of the dies in Figure 8, the male die moves to a position shown in Figure 8, so that the portion of the plate on opposite sides of the corrugation will not become distorted out of alignn'ient, and so that the apex of the corrugation will not contact with the bottom of the cavity 5.

In Figure 9 the edges or supports 7 and S are simply reversed to the edges or supports 7 and 8 in the other figures. It will be noted that the adjacent faces of the male and female dies, that is to say upon opposite sides of the dies, as at 8 and 11 are so formed as to permit the plate metal to creep from opposite sides of the die, as the male die enters the female die. Furthermore the two dies do not come together any closer than sufficient to permit the plate metal to engage between the dies. In other words the male die is limited in its movement to a certain position. However the inclined faces 8, as well as the parts 8 in Figure 9, together with the portions or parts 11, and 7 in Figure 9 act to hold or dispose the metal on opposite sides of the corrugation in direct alignment, and on a horizontal plane, and will also maintain the metal horizontally. lVhen the corrugation begins to form due to the male die bearing upon the metal and acting to force it into the female die, the metal begins to bend over the opposite corners of the depression or indentation of the female die, and obviously the metal will creep from opposite sides of the die, whereas the dies heretofore used the metal is only free to creep from one side only. The terms general level, general plane or shape define those parts of the corrugation forming means, which contact with the metal, in other words those parts of the corrugation forming means, prior to constructing the depressions, which are below the general plane of the corrugation forming means.

The invention having been set forth, what is claimed is 1. A pair of corrugation forming dies havng their adjacent cooperative faces provided with interengaging corrugation forming means, the corrugation forming means of one of the dies being cut away to receivethe varying thicknesses of plate metal during the formation of a corrugation therein.

2. A pair of corrugation forming dies provided with male and female corrugation forming means, the corrugation forming means of each die having means formed below the general level of the surface of said forming means to receive the varying thicknesses in plate metal during the formation of a corrugation,

3. A pair of corrugation forming dies provided with male and female corrugation forming means, the corrugation forming means of each die provided with depressions and protuberances, the depressions adapted to receive the varying thicknesses in plate metal during the formation of a corruga tion, one of said dies having means l iearing against portions of the plate metal upon opposite sides of the corrugation to hold the opposite portions of the plate in horizontal alignment during the formation of the corrugation.

at. A pair of dies, the adjacent faces ther of provided with male and female corrugation forming means, said corrugation forming means having excessive plate metal. receiving means extending longitudinally of the forming means, said excessive plate metal receiving means being constructed below the general contour of the forming means and arranged in staggered relation, for the reception of the varying thicknesses in plate metal in which the corrugation is to be formed.

5. A pair of dies, the adjacent faces thereof provided with male and female corrugation forming means, said corrugation forming means having excessive metal receiving means extending longitudinally of the forming means, said excessive metal receiving means being constructed below the general plane of the forming means and arranged in staggered relation, for the reception of the varying thicknesses in a sheet metal plate in which the corrugation is to be formed, the ends of the staggered excessive metal receiving means overlying each other to insure the reception of the excessive metal of a plate varying in thickness throughout its area.

6. A pair of dies, the adjacent faces thereof provided with male and female corrugation forming means, said corrugation forming means having excessive metal receiving means extending longitudinally of the forming means, said excessive metal receiving means being constructed below the general plane of the forming means and arranged in staggered relation, for the reception of the varying thicknesses in a sheet metal plate in which the corrugation is to be formed, the ends of the staggered excessive metal receiving means overlying each other to insure the reception of the excessive metal of a plate varying in thickness throughout its area, one of said dies having means bearing upon opposite sides of the corrugation, to hold said opposite portions of the plate in positions perpemlicular to the side faces of the die during the formation of the corrugation.

7. In a pair of dies, the opposing cooperative faces of said dies having male and female corrugation forming means, the opposed surfaces of said corugation forming 1 to hold saijdgpdftiona in; positions perpenxtendingflogigifdfidinally ofits-formingface,

bends jdiiring the forcing bf thd plaie' metal ling face @nd,provided; with ineajn I :upqr'l theplatirwtgilaim point substantially anybewemh P s Where the 131m;

cavity? i f rq the m-re met l n send dies 1 holdkthenoppds ite sides of theplafte metal w eni-argpmnf pf 0 permit the ccepti'on it-extending longitudinal I H face; 'over th opPbSitei; edges O whichwpltte f metalfben cl s duringytheffbncin Of th plaiifu ing" 11119011 {opposite sidjes pf theuqorruigatib n,

0i disf: dne having cavity tlig pdvityglthereby forcingTthe plzit meta lfijx cbhstructiongnd arrahgemenfif 0f the Oppos throughout the area dfthe'p1atemeta1, one

pd ite sids ofthebortugationgto be formed 14. A inethod foi' forminglcdi'rfigathn a rjglatiVely thickplate metaLLcO-nsistmg in pressing agcorrugatiom irifthe plate nigtal; 1n compensatmg for varyl ng thicknesses at plate metal, in ma ir itztihingportiofis of th plate meta l q'onoppositelsidesaof the; de-jfl S=11 ifO i gmea sh giilxcessiYe etal) recg 17mg 5 .epresslons and protuberances e'x tending flong tudlnallyof szud surfacsJtO h1g5 as to "lpermitjjthel metal so iciegpkfmm either; (if 1116 sideso f the dies male and female corrugation forming means, said adjacent faces upon opposite sidesiof said corrugation forming means being such as to permit the plate metal to 5 creep from thesides of the dies, and also to cent faces of which having male and female corrugation forming means, the surfaces of said forming means having means constructed below the general level of the surfaces for thereception of the inequalities in I l5 the plate metal when one die is limited in its m'ovement'toward. the other die.

19.- A pair of dies, the cooperative adjacent faces of which having male and female corrugationforming means, the surfaces of said forming means having means constructed below the general level of-the surfaces forthe reception of the inequalities in the plate metal, the adjacent faces of the dies beyond the opposite remote portions of the forming means being such as to permit the plate metal to creep from both sides of the dies as the corrugation is formed.

20. A method for forming a corrugation in relatively thick plate metal, which is ca pable of feeding from opposite directions toward the corrugations, which first consists in pressing a corrugation in the plate metal, maintaining the plate metal beyond and upon opposite sides of the corrugation in aligning planes perpendicular to the sides .1

of a corrugation fori'ning means, in compensating for the varying inequalities at different points throughout the area oif the plate metal.

In witness whereof, in the presence of two witnesses, the inventors signature is here unto aflixed.

l VILLIAM M. CON N ERY. Witnesses EDGAR C. ANoorr, ALBERT W. STEWART.

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