US1122092A - Metal-bending machine. - Google Patents

Description

J. M. FEDDERS.

METAL BENDING MACHINE.

APPLICATION FILED MAR. 30, 1912.

Patented Dec. 22,1914.

2 SHEETS-SHEET 1.

INVENTDR ATTORNEYS 3 Wi TN EEIEIES May (761 Patented Dec. 22, 1914;

Z SHEETS-SHEET 2.

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J. M. FEDD'BRS. METAL BEN-DING MACHINE.

APPLICATION FILED MAR. 30, 1912.

('INVENTEIR 'ATTURNEYEJ WITNEEIEEE JOHN M. rnnnnns, or BUFFALO, NEW YORK, nssieNon, BY MESNE ASSIGNMENTS, 'ro

rnnnnns MANUFACTURING coMrANY, me, or nnrrnno, NEW YORK, A conrom- TION on NEW roan.

'mnrannnNniNe mourns.

Specification of Letters Patent. Patante De -22 1914 Application filed March 80, 1912. Serial No; 687,306.

To all whom it may concern:

Be it known that I, JOH M. Fnnonns, a citizen of the United States, residing at Buffalo, in the county of Erie and State of New York, have invented new and useful Improvements in Metal-Bending Machines,

of which thefollowing is a specification.

This invention relates to a'metal bending.

machine which is more particularly designed for bending a strip of sheet metal so as to form a succession of laterally projecting plaits and also longitudinal oflsets thereon for use in the manufacture of watercooling radiators for automobiles.

It is the object of this invention to produce a machine of this character which will permit of producing such strips expeditiously and economically and without stretching the metal while forming the plaits, and in which the Various parts are so organized that the saine are not liable to get out of order and the wear upon the same is reduced to a minimum.

In the accompanying drawings consisting of 2 sheets: Figure l is a fragmentary vertical longitudinal section of a press or bending machine embodying my invention, the parts being represented in a position in which the punch and die are separated to their fullest extent. Fig. 2 is a similar view of the same but showing the parts in an intermediate position. Fig. 3 is a verticaltransverse section taken substantially in line 3 3, Fig. 1. 4 is a bottom plan View of the punch.. Fig. 5 is a top plan View of the die. Fig. 6 is a fragmentary vertical longitudinal section taken in line 6-6, Fig. 5. Fig. 7 is a fragmentary perspective view of the plaited radiator strip which is produced by my improved bending machine.

Similar characters of reference indicate .corresponding parts throughout the several a longitudinal row, a plurality of laterally projecting plaits 2 the walls of which are connected at their outer edges .while their inner edges are connected respectively with the opposing transverse edges of two adjacent webs, and outwardly projecting offsets or beads 3 arranged longitudinally at opposrtelateral edges of the webs, the offsets at corresponding lateral edges of the webs beand 5 the punch or upper member thereof which is movable vertically toward and from the die. The die is mounted on a stationary holder, support or table 6 while the punch is'mountedona vertically movable head or holder 7 which may be operated by any suitable or well known means, such operating. mechanism not being shown in the drawings inasmuch as the same may be like that now in general use.

its general organization the die comprises a body or base having front and rear cross bars 8, 9 and two longitudinal sidev bars 10 connecting corresponding ends of the front and rear bars so that the same in effect forms a rectangular open-frame resting upon the upper side of the support or table.

Within the frame-shaped die base or body are arranged the die members or sections proper, the same comprising-a front die section 11,. an intermediate 'die'section 12 and a rear die section 13. The front die section is arranged. within the front part of the base and secured to the front cross bar by screws 14- or otherwise so as to be fixed or heldstationary and the same is provided on its upper side witha flat horizontal face- 15 and two longitudinal ribs, beads or raised portions 16 arranged at opposite ends of the upper flatportions of this section. The upright rear transverse side of this front guide section has a lower vertical portion 17 while the corner between the upper end of this rear side and the rear end ofthe upper side of this die section is rounded or beveled slightly, as shown at 18 in Figs. 1 and 2.

The intermediate die section is provided on its front side with an upright face 19 which cooperates with the vertical face of the front die section, on its rear side with a vertical transverse lower face 20 and on its upper side with a horizontal face 21 andlongi-tudinal upwardly projecting ribs or raised portions 22. The upper front corner of theintermediate diersection is beveled,

as shown at 23. Normally this intermediate die section is yieldingly heldin an elevated positionis'o' that the upper side thereof is arranged above the upper side of the front die section a distance substantially equal to v the depth of the plaits of the radiator: strip and the underside of this die section is-raised above the table or support of the die to a similar extent; as shown in full lines in Fig. 1. The intermediate die section is moved vertically and the same is guided in this movement preferably by engagement of its front side with the rear side of the front section and by engagement of its opposite ends with the inner sides of the side bars andalso by means of vertical guide rods 2"! 1 each of which is secured at its upper end to the underside of the intermediate die section while its lower end slides in ayertical guideway 25 formed inthe adjacent part of the support 6. The upward movement of this guide section is limited by means. of enlargements or heads 26 formed at the 7 lower ends of the guide rods 24 and adapted to engage with downwardly facing shoulders 27 formed in said guideways, asshown in Fig. 3.-

The rear section of the die is arran ed in rear. .of the intermediate section an is capable of both a vertically and also ahorizontally reciprocating movement. .On its so front 'side'the rear die section is provided with a lower vertical transverse face 28 which is arranged opposite the vertical rear face of the intermediate sectlon, a horlzon- .taL upper ,face 29, upwardly projecting longitudinalv-ribsor ralsed portions 30 arranged at. opposite ends of the upper horizonalface,- ands." downwardly v recessed rabbet' 31 of rectangular form arranged in rearof the upper horizontal face. The rear 40. die section is guided inits horizontal and vertlcal movements-preferably by means of two-upright'guiderods 32 each of which is secured at its up er 'and .to the underside of this section w 'leiits lower end slides in aguideway33 formedin the adjacent part .of" the support or table, these uideways being. elongated lengthwise .of t e die sow as to permit' of -jthe requisite longitudinal movement of vthis 'SQGtIOIl. The i1 ward movement ofJthe reardie sectionris l mited by'means-=of an enlargement ior ihead' 34 formed at the lower-endofaeach of. the guide rods' 32'and engaging' with afdownwardly facing-shoulder 351 formed .the guideway- 1555 B3 a's shown in Figi ar'iou's' means? ma e dingly holding the" intermediate and rear lo'o sely at-their uppe v rear part of the die base and secured by s r. above the faces 'of the intermediate and'rear be employed for.

4 guide seeti'ons in-v elevatedi-po'sition butthose ashbwniin the damage-am preferred al mme se ra ded: si lmy formedintheqsup tableand ;en' ,1 d's'lwith the" dersides of the intermediate'and reali-fldie 42 at the lower end of the main supporting rod, as shown in Figs. 1, 2 and 3. The upward movement of the lifting plate is preferably limited by engagement with the underside of the table; In the elevated position-of the rear guide section its upper 'and lower sides are flush with the corresponding sides of the intermediatedie sections. The elevated ribs of the several die sections at the corresponding ends thereof are arranged lengthwise in line, as shownin Fig. 5. 35

The longitudinal horizontal movement of the rear die section may be produced by various means, the means for this purpose shown in the drawings consisting of springs 43 interposed between the lower opposing 0 vertical faces of the intermediate and rear fdie sections and each seated at its opposite ,lower rearside ,of therear'die section and engaging with an inclined face 45 formed on the front side ofa stationary abutment block46 arranged upon the tame within the t bolts 47 or otherwise to the rear barof the base, asshown in Figs.v 1 and- 2. Upon depressing therear die section the same is moved horizontally forward by the wedge or cam action of its rear inclined face with the inclined face at the front endlof the abutment block, and when, the rear die section is elevated the same is moved horizontally rearward by the resilience of the springs 43. Projecting upwardly from the bottom of the rabbet on the rear die section are two retaining pins or lugs 48 which have their upper ends flush with the upper sides of this die sectionv and are separated tion is constructed in an elevated position die sections while the die and punch are separated or open which means also serve to lift this radiator, section'from the die after the bending operation-has been completed so as topermit the-blank to he moved .125 forwardly step by step after the successive bending operations have been performed on the same. This lifting device preferably comprises two vertically-movable ejector oi-lifting rods 49; which are guidedin suitable openings or ways .50'formed in the front die section, and springs 80 arranged in pockets 51 formed in'the table and engaging with the lower ends of these ejecting pins. In theireleyated position the upper ends of these ejecting pmsare arranged above the upperfac'e of the front die section a distance" equal to twice the height of the plaits ofthe' finished radiator strip and the extent ofthis movement is limited preferably by means of enlargements or stop heads 52 formed, at'the lower ends of the ejecting pins and engaging with the under side of the front die section.

Although the punch sorfar as its detail construction is. concernedmay be varied to some extent it: is preferably constructed as follows: 53 represents the body or base of the ]punch which ma be secured to the vertica screws 54, as' shown, or any other suitable means. On its underside the punch body or base is provided near its front end with a transverse punch blade, former or tongue 55 which isfladapted to coiiperate with the rear side of the front die section and the-beveled front corner of the intermediate die segtion for effecting a preliminary or partial bending of the metal of the blank for partly bending one of the plaits thereon. This punch blade is preferably removably secured to the punch base byarranging the upper part of this bladein a slot or groove 56 in said base and securing the same therein by meansof set screws 57 so that this blade projects below the face of the punch base an extent equal to the height of one of the plaits of the radiator strip. The front side 58 of the front blade is vertical and in line with the rear side of the front die section and the rear side 59 of the same is beveled and arranged parallel with the inclined face at the upper'front corner of the intermediate die section; In Year of the punch blade is arranged a clamping block or a'w: 60 which 1s movable vertically relatively to the punch base and which is adapted to press the radlator blank against the upper sides orfaces of the intermediate and rear guide sections during h'e operation of forming the plants in-the underside of the punch-body in rear of thepunch blade and is provided with afiat horizontal face 62 onits" underside which isadapted to cooperate with the flat upper beads of the intermediate vand rear die sectionsand with longitudinal. rooves 63 nearopposite ends of its flat ace which. are

adapted to receive ,the longitudinal ribs or beadsof the intermediateand rear die sections. The clamping block may be guided in its vertical movements relatively to the punchibase by any suitable means but preferably by the means which are shown 1n the y movable hea 'or holder by means of' Thisclamping block ismovable vertically in arecess 61 formed Figs. 1, 2 and 3. In its lowermost position.

relatively to the punch body and blade the clamping block has its lower face arranged below the lower edge .of said blade, as shown n Fig. 1. The clamping block is yieldingly held in this position by means of vertically movable pressure rods 66 secured at their lower ends to the upper side of the clamping block and guided at their upper ends in ways 67 formed partly in the punch. body and partly in the punch holder, and springs 68 each of which is. arranged in the upper ends of one of said guideways 67 and bears against the upper end of the respective presser rod. Theniownward movement of the clamping block relatively to the punch body and bladeis limited by means of a stop device which preferably consists of'enlargements or heads 69 formed at the upper ends of the guide rods 64 and presser rods 66 and adapted to engage with upwardly facing shoulders 70 formed in their companion guideways. Those portions of the underside of the punch body in front and in rear of the punch blade are provided with horizontal bearing faces 71, 72 which are adapted to cooperate with the corresponding fiat upper v faces of the front and intermediate die sections, "and near opposite ends of these fiat faces the punch body is provided with longi tudinalgrooves ."73, 74 which are arranged lengthwise in line with the' companion radiator. .strip. -'The sheet of metal fromwhich the radiator strip is constructed may be supplied totlie machine and fed forward intermittently one step ata time with-an interval of rest between each step by any suitable means. V

In Fig. 1 the-parts are represented in full lines in the position which .they .assume when the die and unch are fully separated and the sheet meta blank has been fed for- -Ward one step preparatory to being oper-' ated upon for producing the next plait and offset forming operation thereon. It will be noted that in this position of the parts the intermediate and rear sections of the die are in. their uppermost position, the blank is lifted by the ejecting pins into a position in a which the completed and partly completed zplaits are arranged Wholly above the upper faces of theintermediate and front die sections, and the clamping block of the punch is depressed and "has its lower face arranged below thelower edge of-the punchblade.

Duringthe first step of the downward move ment of the punch the underside of the clamping block is brought into engagement wlth the blank above the intermediate and rear die sections whereby the adjacent part of the blank is clamped between this block and these die sections but the punch blade is still out of engagement from the blank,

as shown by dotted lines in Fig. 1. During the punch blade move downwardly independently of said clamping block and intermediate and rear die sections, thereby causing the underside of the punch body in rear of the punch blade to bear upon the blank resting upon the adjacent part of the intermediate die.sectionland also causing the beveled'face of the punch blade to bend the adjacent part of the blank downwardly into engagement with the beveled upper front corner ofthe intermediate die' section, as shown by'full lines at '7 5 in Fig. 2 and form the rear wall of a plait. The intermediate and rear die sections are thus held in their uppermost and elevated position while the clamping block recedes into its recess in the punch body by reason'of the spring 40 which, sustains the intermediate and rear diesections being stiffer or stronger than the springs 68 which tend'to depress the clamping block. While the punch blade is thus bending the metal blank theejector pins also recede downwardly into the front die sectionso that that part of the blank" immedi'atelyin front of the punch blade or in Fig. 2. During the next following and tions are in their elevated and separated poformer will rest upon the upper side of the front die section, as represented by full lines finaldownward step of the die and associated parts the body, blade and block of the punch as well as the inter-mediateand .rear die sections of the die move in unison from the position sho'wn by full lines in Fig.2

to the position shown by dotted lines in this same figure, thereby causing the punch blade to move downwardly along the rear side of the front die section, whereby the metal of the blank infront of the blade is moved forwardly and downwardly' along the rear side of the front die section; at right angles;

to the body, of the blank a suflicient extent to form the front wall 76. of the plaits which vertical wall is a companion to the inclined rear wall of the plait formed between the beveled faces of the die blade and intermediate die section. While the intermediate and rear die secsition the first part of the downward movement ofthe punch causes its clamping block to press the sheet metal blank so that the previously 'p'artiallv formed plait having punch body,

-of.-the radiator'strip between the intermedii die sections to becompleted.

ate and rear As the blank is pressed downwardly by the punch against the die each completed blank enters the rabbet formed on the rear part of the rear die section'so that the same is not downwardly affected by the formation of the succeeding plaits and that immediatelyin rear of the first completed plait is supported by the retaining pins '48 so as to prevent distortion'of the strip durpart of the radiator strip mg the operation of forming succeeding plaits thereon.

While'the' members of the punch and die are coeperating with each other in the manner described for producing a" partial plait on one portion of the blank and completing another plait on another part of the blank the cotip'erating longitudinal ribs grooves of the die and punch members produce the longitudinal ofi'sets at opposite and longitudinal edges of the webs of the radiator strip. iThese oflsets are partially formed by the ribs of the front die section and the grooves of the punch body in front ofthe punch blade and these oflsets are completed subsequently by coiiperation of the ribs on the intermediate die sections with the offset grooves in the punch body in rear of the blade and the front part of the offset grooves in the clamping block and by engagement of the offset ribs of the rear die section with the rear part of the offset grooves in the clamping block. After the punch has completed its downward stroke relatively to the die and has effected the partial formation of one plait and com; pleted the formation-of another plait the punch is raised to its highest position. During the first part of this movement the blade and block and also the 1 intermediate and rear die sections move up wardly together. When the intermediate and rear die sections have reachedStheir uppermost position the punch body and blade contmue their upwardmovement I while the punch block remains in enga e-' ment with the Intermediate and. rear ie sections and during the last part of the up- "ward movement of the punch the clamping block is lifted from the intermediate and rear die sections and the ejector pins raise the strip blank so that its'.plaits are above the upper surfacesof the last mentioned die sections. At the same time that theintermediate and rear die sections are raised the completed bead of the radiator section is released by reason ofthe rearward movement of the rear die section under the action of the springs 43.

By inserting shims 77 of varying thicknesses between the abutment 'block and the rear cross bar of the die holder it is possible to adjust the horizontal throw of the rear die section for admitting the same to fold the plaits more or less closelyasdesired and also for taking up wear on the cooperating inclined surfaces of these parts. The front and rear working faces of the intermediate die section'and the'front working face of the rear die section are. each preferably cut back slightly in the central,

parts of the same while the end parts are left full, as shown in Figs. 1, 2, 3 and '5.

'By this means the ends of the walls of each plait are pressed firmly together for presenting a solid, or continuous edge on the front and rear sides of the finished radiator while the parts of each plait intermediate of its ends are separated'so as to permit water to enter into these spaces and thereby increase the cooling efiiciency of the radiator.

My improved construction ofv bending machine for producing these plaited. and offset radiator sections or strips is so organized that the metal at no time i is stretched or distorted but is merely bent naturally, thereby preventing variation in the length of the strips or in the spacing of the distances between adjacent 'plaits, whereby the assembling of the strips in the manufacture of the radiators is facilitated and uniform and better fitting radiator tubes are insured. Moreover by avoiding stretching of the metal it is immaterial whether or not the same is tempered and all liability of weakening. the metal or forming leak holes in the same is avoided.

Furthermore,in my improved construction of bending machine the metal is operated upon in such manner as to result in .a mini mum strain or wear uponthe dies, thereby I reducing the liability of getting them out of order as well as eifecting a saving in the cost of repairs.

I claim as my invention:

1. A metal bending machine comprising a die having a fixed front section, a vertically movable intermediate section cooperating with said front section, and a vertically and horizontally movable rear section coiiperating with the intermediate section and a vertically movable punch having a body cooperating with the upper sides of said fr'ont and intermediate die sections, a blade fixed on the body and adapted to co. operate with the rear side of said front die section and the upper front corner of said intermediate die section, and a clamping block-movable vertically independently of. said blade and body and adapted to cooperate with the upper sides of said interme-' -diate and rear die sections.

2. A metal bending machine comprising a die having a fixedvfront section, a verti- I cally movable intermediate section 006perating with said front section, and a ver- I tically and horizontally movable rear section' cooperating with the intermediate section, a vertically movable punch having a body cooperating with the upper sides of [said front and intermediate die sections, a

blade fixed on the body and adapted to cooperate with the rear side of said front the section and the upper front corner of said intermediate die section, and a clamping block movable vertically independently of sai d blade and body and adapted to coiiperate with the upper sides of said intermediate. and rear die sections, means for holding saidintermediate and rear die sections yi'eldinglyin an elevated position, and

means for holding" said clamping block yieldingly in a depressed position.

JOHN M. FEDDERS.

Witnesses: I

Tnso. L. Porr, E. M. GRAHAM.

WVitness my hand this 28th day of March,

Corrections in Letters Patent No. 1,122,092.

It is hereby eertifiedthat in Letters Patent No. 122,092, granted December 22,

1914, upon the application of John M. Fedders, of Bufiaio, New York, for an improvement in Meta-l Bending Machines,- errors appear in the printed specification requiring correction as follows: Page 3, line 57, strike out the words beads" of the intermediate and rear end insert the words faces of the upper .and intermede'ate; page 5, line 10, for the word admitting read adapt ed; and that the said Lettere Patent shouldbe read with these eorreetions therein that the same may chhforrn to the reeord of the case in the Patent Oifice. 4 Signed and sealed this 19th day of Jannary A. D., 1915 [5m n] R. F. WHITEHEAD,

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