US2364736A

US2364736A - Metalworking machine

Info

Publication number: US2364736A
Application number: US501115A
Authority: US
Inventors: John J Mcglone; Robert I Anderson
Original assignee: Whiting Corp
Current assignee: Whiting Corp
Priority date: 1942-11-21
Filing date: 1943-09-03
Publication date: 1944-12-12
Anticipated expiration: 1961-12-12

Description

Dec. 12, 1944. 1,J. MCGLONE r-:rAL 2,364,736

METAL WORKING MACHINE A Original Filed Nov. 2l, 1942 5 Sheets-Sheet 1 Dec.- l2, 1944. LJ, McGLoNE ErAl. 2,364,736

METAL WORKING MACHINE Original Filed Nov. 2l, 1942 3 Sheets-Sheet 2 De@ 12 1944. .1. J. McGLoNl-z ETAL 2,354,736

METAL WORKING MACHINE Original Filed Nov. 21,*1942 3 Sheets-Sheet 5 Patented Dec. 12, 1944 METALWORKING VMACHJM:`

John J. McGlone, Harvey, and vRobert L'Anderson, Chicago, Ill., assignors toWhiting Corporation, Harvey, Ill., a corporation of Illinois Original application November 21,1942, Serial No.

466,514.` Divided and this applicati@ Simili!!!- ber ,3, 1943, Serial No. 501,115

18 Claims.

The present invention relates generally to machines for working metal in the form of sheets or plates, More particularly the invention relates to that type of metal working machine which serves to carry out or effect a hanging operation and embodies: (1) a C-shaped combined housing and supporting structure; (2) a lower shaftwhich isl disposed at the outer extremity or end of the bottom arm of the structure and extends upwardly and outwardly at approximately an angle of 45 with respect to the horizontal, a vertically movable head at the outer end of the top arm of the structure;v (3) an upper shaft on the head which extends .inwardly and downwardly at substantially a 45 angle and has its inner end disposed normally over and adjacent the outer end of the lower shaft; (4) power driven mechanism including gearing and drive shafts within the structure for conjointly driving the upperA and lower shafts in opposite directions; (5) a pair of complemental, coacting flanging rolls which are mounted on the upper and lower shafts, respectively; and (6) a flanging hold-down attachment, in the form of a pair oi arms which have rollers thereon for holding down and preventing upward bulging of the central portion of the work vduring drive and operation of the Hanging rolls.

One object of the invention is to provide a metal working machine of this type which is .an improvement on, and lhas certain advantages over previously designed machines for the same purpose, and is characterized yhy the fact that it includes a novel mount whereby the flanging holddown attachment is supported so it may be quickly and readily adjusted with respect to the flanging rolls. f

Another object of the invention is to provide in connection with a metal working machine of the type under consideration a flanging holddown attachment of new and improved' form.

Other objects of the invention and the various advantages and characteristics of the present metal working machine will be apparentfrom a consideration of the following detailed descrip# tion.

'The invention consists in the several novel features which are hereinafter set forth and are more particularly defined by claims at the con-3 Werking machine embodying .the invention shewing the improved hanging held-down attachment in place on the novel mount;

Figure 2 is a plan view cf the machine, parts being broken away and other parts bei-ng shown in section for .illustrattive'lcilrpcses Figure 3 is an enlarged horizontal section taken on the lineA 3,- 3 of FQgure 1 and showing the ,I'langing ,hold-down attachment in its operative position;

Figure .4 -is an ,enlarged plan view of the vflanging hold-down attachment;

,Figure .5 is e' transverse section taken Online line `5.5 of Figure 4 and illustrating in detail the construction .and Adesign I4o f such attachment;

Figure 6 is a side view kof the ging `holddown attachment. l l

, The Amachine which is illustrated `in the ,dra-w i,ngs..constitutes the preferred form or ment of the invention. It is adapted to ycarry out or .effect hanging of pieces of sheet or |`plate' metal and includes .a pair yof complemental cof acting flanging lrolls 8 and-,8, a Hanging hold.- .down attachment Il), and a mount III ,for the attachment. The langi-ng rolls 8 and :9 are adapted to be used together with the hanging hold-.down

attachment IIJ when it is 4desired to the ma- .chine to form downturned marginal nangesy on circular .ordisc-like workjpieces. l

' The machine, with the exception cf `the nie ,tachrment andthe mount. .I ,I therefor, is of conventional .or standard construction land comprises 'a C-.shaped .combined housing and supporting structure l2, a lower roll carrying shaftul 3, a movable head I4, an upperroll carrying l5 on the head, and mechanism forconjointly driving' the two roll carrying shafts-f 'Ellecombined housing .and supporting structure comprises a hollow .bottom ,arm A I 6, .a hollow top Iarrn III and aliollow connecting part .I8 and is preferably in .thefQrm of aoneepiece casting. The ,bottom arm 1.5 of the Structure has a -flat Ltop,surface .I9 l

and is so designed 0r constructed that the hcl:-I

tom portion thereof serves as a base for sumiort-l 111g the machine in .upright position on the licor or foundationof the establishment the machine Vis used. The top arm of the eognoutwardly at an angle of approximately 45 with respect to the horizontal. The lower end of this shaft is housed within the bottom arm I6 of the structure I2 and the upper end is exposed and is adapted to carry the hanging roll 9. The head r I4 carries the upper shaft I5 and overliesthe upper or outer end of the lower shaft lI3. It is mounted for vertical lsliding movement in a guideway 2I in the outer extremity or end of the tolp arm I1 and is adapted to be raised or lowered by way of an upstanding screw shaftv 22. This screw shaft, as shown in Figure 1, extends through a vertical internally threaded socket in a bracket 23 on the upper portion of the top arm I1 of the structure I2 and has a hand wheel 24 xed to its upper end. The` lower end of the screw shaft is operatively connected to the upper portion of the head I4 so that the screw shaft is rotatable relatively to the head while at the same time the head is connected to the shaft so as to move vertically in connection with such movement of the screw shaft. When the hand wheel.

,241s rotated in one direction the headftogether with the upper shaft I5, slides downwards towards the outer end of the bottom'arm I6 of the structure I2 and when the hand wheel is reversely rotated the head and the upper shaft are caused to slide Iupwards in a rectilinear course. The upper `shaft I is journalled in a` bearing 25 on the lower 'portion of the vertically movable head I4 and extends downwardly and inwards at substantially a 45 angle, as shown in Figure 1. The lower or inner end of the upper shaft is adaptedV to carry theflanging roll 8.v The mechanism for conjointly driving the.

two shafts I3 and I5 comprises an electric motor 25 on the upper rear corner of the combined housing and supporting structure I2, a horizontally extending drive shaft 21 inthe upper rear portion of the structure I2, a horizontally extending shaft 28 in parallel lrelation with the drive shaft 21, change speed gearing 29 between the two last mentionedV shafts, a horizontally extending driving shaft 30 in the top arm I1 of the structure `I2, a horizontal driving shaft 3l inthe bottom arm IB, clutch controlled gearing 32 for driving the drive shaft 36 from the drivenshaft 28,A a gear train 33 for driving the driving shaft I vfrom the driving shaft 30, a pair of meshing bevelgears4 34 and 35 between. the front endof the driving shaft 30 and the Aupper o'uterfend of the upper roll carrying shaft I5 for driving the latter shaft from the former shaft, and a pair of meshing bevel gears 36 and' 31 between the front end of the driving shaft 3l and the inner end of the roll carrying shaft I3 for driving the latter shaft from said .driving shaft 3I.l The electric `motor 26 is drivably connected to the drive shaft` 21 by way ofa pinion 38 and a gear 39. i The change speed gearing 29 betweenthe driving shaft 21 and the driven shaft 28 is in the form of pairs of meshing `gears on the two last mentioned shafts and is controlled by a key (not shown) which is slidably mounted in a horizontal keyway 40 in the driven shaft 28 and is adapted, in response to longitudinal adjustment thereof, to lock one of the gears on the driven shaft 28 forv drive by the gear on the driving shaft that is in mesh therewith. Ad- Vjustment of the key is effected by way of mechanism including a hand lever 4I. controlled gearing 32 is in the form of a loose pinion 42 on the rear end of the driven shaft 28 and af fixed gear 43 on the rear end of the driving shaft 30. The clutch for controlling The clutch nected to, the connecting part I8 .of the combined `supporting structure I2.

x bottom arm I6 of said structure. 41 is located at the right-hand side of the machine `said guide rodv 41 is mounted in a horizontal, `open-ended socket 49 ina horizontally elongated `of said bracket.

such gearing comprises a driving clutch member 44 which is slidably and drivably mountedon the rear extremity Vof the driven shaft 28 and a driven clutch member which is in opposed relation with the clutch member 44 and is fixed to the pinion 42 of the gearing 32. The clutch member 44 is shifted into and out of engagement with the clutch member 45 by way of mechanism including a hand lever 46 on the front or outer end Iof the top arm I1 of the combined housing and When it is desired to use the machine the hand lever 4I is manipulated so as to .bring into operative position the desired pairof gears of the change speed gearing 29. Thereafter the electric fmotor 26 is started `and this results in drive of the driven shaft 28 from the drive shaft 21 through the medium of the change speed gearing 29. After the motor 26 has reached its normal speed the clutch member 44 is shifted into engagement with the clutch member 45 by 4manipulation of the-hand lever 46. Upon engagement of the'two clutch members the driving shafts 30 and 3| operate `conjointly to drive theroll carrying shafts I5 and i3, respectively. 'I'he'gearing is so designed that thel roll carrying shaft I5 is driven in a clockwiseI direction when viewed from the front :of the machine and the lower roll carrying shaft I3 is driven in a counterclockwise direction.

The mount II serves as a medium or instrumentality for adjustably supporting the anging hold-down attachment I6, andiconsists of a pair of guide rods 41 and 48. Thesetwo rods are arranged in parallel relation and extend horizontally. They areV disposed at opposite sides of the combined housing` and supporting structure I2 andare in straddled'relation with-the The guide rod as viewed in Figures 2 and 3. The rear end of member 5D. Thelatter has a flat upper portion whichunderlies, and is connected to, the horizontal leg of an angle bracket 5i. The vertical leg of such angle bracket ts against, and is conhousing and supporting structure I2. Set screws 52 are disposed in threaded holes in the outer side portion of the member 5U and serve releasably to hold lthe rear end of the guide rod 41 in the socket 49. The front end of the guiderod 41 ts withina horizontal, open-endedsocket 531m one end of a horizontally elongated bracket. 54 and is releasably secured in place by means of a set screw 55 which extends through the outer side portion The central portion of the bracket 54 fits against, and is connected to, the

outer or front endof the bottom arm I6 ofthe structure I2. The guide rod 41 has a flat 56 ion the bottom thereof and is normally rigidly held in place by way of the

set screws

52 and 55. When the set screws are loosened the guide rod 41 may be'removed from the

sockets

49 and 53 by sliding it forwards beyond the bracket 54. The socket 52 in the bracket 54 is axially aligned with the socket 49 in thefmember 59. Thevguide rod `48 is on the left-hand side of the machine as viewed "in Figures 2 and 3.n It is disposed in the same horizontal plane as the guide rod 41 4and has the rear end thereof mounted in a horizontal openended socket 51 in a horizontallyy elongated mem- *ber 58. Such member has a flat upper portion which underlies, and is bolted to, the horizontal l leg of an angle bracket 59. The vertical leg of the angle bracket 58 ts against, and is bolted to, the adjacent side of the connecting part I8 of the combined housing and supporting structure I2. Set screws 60 extend through threaded holes in the outer side portion of the member 58 and serve 5 releasably to hold the rear end of the guide rod 48 in the socket 51. The front end of the guide rod is mounted in a horizontal open-ended socket 6I in the other end ofthe bracket 54 and which extends through a threaded hole in the outer Side portion of the part of the bracket 54 that defines the socket 6|. Said socket 6I is axially aligned with, and the same in diameter as, the socket 51. are released the guide rod 48 may be removed from the sockets 51 and 53 by sliding it forwards. Said guide rod 48 has a flat 63 on the bottom thereof.

vis releasably secured in place by a set screw 62 10 When the

set screws

66 and 62 15 The anging rolls. 8 and 9 and the anging 20 hold-down attachment Il) are employed or utilized when the machine is used marginally to flange work pieces in the form of sheet or plate metal discs. The anging roll 8 is removably mounted on the inner lower end of the upper shaft I and 25 has in the periphery thereof an annular groove of V-shaped cross section. The wall portions that define the groove are disposed at right angles to one another, as shown in Figure 6. The other coacting Hanging roll, that is, the roll 9 is re- 30 connection with drive of the machine, the roll 8 40 is lowered slowly and progressively toward the roll 9 for flange forming purposes. In connection with a anging operation the disc-like work piece rotates due to rotation of the rolls and thus the entire margin of the piece is formed into a downturned right angle flange at the conclusion of the fianging operation. Thel attachment I0 serves as a medium for preventing upward deection or bulging of the central portion of the work piece during flanging of the margin of the piece. It is in the form of a unit and consists of a horizontally elongated saddle type bracket 64, a shaft 65, a pair of sleeves 66 on the shaft 65, a pair of arms 61 on the sleeves, and a plurality of rollers 68 on the arms. The bracket 64 extends transversely across the bottom arm I6 of the combined housing and supporting structure l2 and has vat the ends thereof downwardly facing grooves 69 of semi-circular cross section for slidably receiving the upper portions of the guide rods 41 and 48. bolted to, the ends of the bracket 64 and these have upwardly facing grooves 1I of semi-circular cross section for slidably receiving the bottom portions of the two guide rods 41 and 48. Up-

Two cap members 10 underlie, and are 60 standing set screws 12 in the central portions of l65 the cap members 1 6 serve when tightened to hold the hanging hold-down attachment I0 against sliding movement with respect to the guide rods 41 and 48. As shown in Figure 5, the upper ends of these set screws are adapted to engage the flats on the bottom portions of the guide rods. The groves 69 at the ends of the bracket 64 and the upwardly facing grooves 1I in the cap members 1-6 define cylindrical, open-ended sockets which are of slightly greater diameter than the with use of the attachment I0, tobe slid back and forth on the guide rods into any desired position. The shaft 65 is disposed above, and in parallel relation with, the saddle type bracket 64 and is supported for vertical adjustment by way of a pair of eye bolts 13.' The latter comprise eyes and depending threaded shanks and 4are located at the ends of 4the bracket 64. The eyes of the eye bolts encircle the ends of the shaft 65 and form bearings whereby said shaft is permitted to rock back .and forth The Shanks of the eye bolts extend loosely through apertured lugs 14 on the ends of the saddle type bracket 64 and carry upper nuts 15 and lower nuts 16. The upper nuts rest on the-upper surfacesof the lugs 14.and the lower nuts serve as lock nuts. loosening Athe lower nuts 16 and conjointlyturning the upper nuts 15 vertical adjustment ofthe shaft 65 may be eifected. When the, shaftis I vertically adjusted to the desired extent tightening of the lower nuts 16 will lock it in place against vertical displacement. The sleeves 66 are mounted in spaced relation on the central portion of the shaft 65 and are held against rotation relatively to the shaft by way of keys 11 which are connected to, and project outwards from, the shaft and t within keyways .18 in the sleeves. The key and keyway connections between the sleeves and the shaft permit the sleeves to be adjusted to and from one another while maintaining the sleeves against rotation relatively to the shaft. The rear portions of the sleeves 6.6 are provided with set screws 19 for locking the sleeves against longitudinal movement on the shaft and the front portions of the sleeves'are provided with forwardly extending, substantially horizontal lugs 80. The arms 61 of the langing hold-down attachment IIJ normally extend hori.- zontally. They project forwards from the sleeves 66 and have the rear ends thereof positioned yon top of the lugs 86. Vertically extending bolts 8| extend through aligned holes in the ylugs .80 and the rear ends of the arms 61 and form pivots whereby the arms may be swung to and from one another (see Figure 4). When the bolts 8l, are tightenedthe arms are clamped in place. When such bolts are loosened the arms may be 4swung to or from one another,` as previously pointed out. The outer ends of the arms 61` are.` in the form of spindles and serve. rotatably to support the rollers 68. `Preferably each arm 61 is provided with a longitudinal series, of abutting rollers. Collars 82 are mounted on the extreme front ends of the arms 61 and serve to hold the rollers in place. When the attachment I Il is-n its operative position, as shown in Figures 4 and 6, the roller carrying arms 61 are located at one side of, but slightly above, the'flanging roll 9 on the shaft I3 and engage the work piece on such roll so that in connection with a flanging operation the central portion of the work piece cannot bulge upwards. In connection with a iianging operation the central portion of the work piece being flanged exerts upward pressure on the rollers tending to rock the shaft 65- in a clockwise direction as viewed in Figure 6. In order releasably to lock the shaft 65 against such rock`k ing movement a latch 83 is provided. This latchA comprises a sleeve 84 and an eye bolt 85. The sleeve is keyed or otherwise flxedly secured to the end of the shaft 65 that overlies the guide rod 41, and has a rearwardly extending lug 86. The eye bolt 85 is disposed beneath the lug 86 and is pivotally supported by a pin 81 so that itmay be swung back and forth between an'operative I lower flanging roll 9.

position wherein it extends upwards and is in substantially ydead center relation vwith the sleeve 84vand an inoperative position wherein it extends rearwards and permits the shaft G5 to rock in a clockwise direction as viewed in lFigure 6. The pin 81 extends through the eye of the eye bolt 85 and is carried by a pair of laterally spaced upstanding lugs 88 on the end of the saddle type bracket 64 that is beneath the sleeve 84. 'The outer or distal end of the shank of the eye bolt is provided with a lug engaging abutment type nut 89 and this is normally locked-in place by a jam nut B0. `A tension spring 9! serves to urge the eye boltinto'its operative or latching position.` One vend of this springy is connected to a screw` 92 on the eye of the eye bolt and the otherend of.. thespring is anchored to a screw 93 on the bracket 64. In connection with a flanging operation the work piece is properly positioned on the Thereafter the shaft 65 is rocked in a counterclockwise direction as viewed in Figure 6 in order. to bring the rollers 68 into contact with the central portionof' the top surface of the work piece. As soon as the shaft is so rocked the eye bolt :85 is swung vupwards into its operative position wherein the nut 89 underlies the lug 85. After latching of the shaft 65 in place the machine is started and the upper anging roll 8 is fedY downwards by proper turning of the hand wheel 24. During the fianging operation the rollers 68 `prevent upward deflection or ybulging of the central portion of the work piece, as heretofore pointed out. At the conclusion of` a flanging operation the eye bolt 85 is swung rearwards into its inoperative position in order to release the shaft E5 so that it may be rocked in a clockwise direction as viewed in Figure 6 for roller releasing purposes. Adjustment of the nut 89 on the shank of vthe eye bolt 85 serves to vary the locked position of the shaft 65 and the roller carrying arms 61. In order to facilitate swinging of the roller equipped arms for a flanging operation the shaft l65 is provided with a radially extending hand lever 94. The flanging hold-down attachment Hl may be adjusted to function in connection with aV work piece of any'particular diameter or thickness by sliding the bracket 64 either backwards or forwards on the guide rods l1 vand 48, raising or lowering the shaft 65, and shifting the sleeves 66 to or from one another on' the shaft 65. The fianging hold-down attachment may be removed from the mount l0 byreleasing the guide rods ill and 48, then sliding such rods forwards and thereafter Asliding the attachment off the free rear ends of the guide rods. f

The'herein described metal working machine is highly efficient in operation due to the'specific design and arrangement of the ilanging holddown attachment I0 and its mount H. The mount permits of ready adjustment and removal ofthe attachment. The attachment is simple in construction and design and hence may be manufactured or produced at a low cost.

The invention is not to be understood as restricted to the details set forth since these may be modified within the scope of the appended claims without departing `from the spirit and kscope of theinvention. v V

This. application is a division of an application filed by us on November 21', 1942, Serial 466,514.

Having thus described the invention,fwhatiwe claim as new and desire to secure by Letters Patent is: Y Y f 1. Ina metal working machine of the character described, the combination with a C-shaped supporting structure, and a pair of power driven shafts mounted one at the outer end of the bottom arm of the structure and the other at the outer end ofthe top arm of said structure, and having certain ends thereof disposed adjacent one another and provided with complemental coacting flanging rolls, of a pair of horizontal guide rods mounted on the structure and positioned along and outwards of opposite sides of one of said arms, and a flanging hold-down attachment comprising a horizontally elongated bracket extending transversely across said one arm and having the ends thereof slidably mounted on the rods so that it is slidable to and from the rolls, and a pair of laterally spaced arms projecting from the bracket in the direction of said rolls, mounted so they are conjointly shiftable with said bracket, and adapted to overlie the top surface of a work piece during a anging operation.

2. In a metal working machine of the character described, the combination with a C-shape'd supporting structure, and a pair of power driven shafts mounted one at the outeriend of the bottom arm of the structure `and the other for vertical adjustment at the outer end of the top arm of said structure, and having certain ends thereof positioned adjacent. one another and provided with complemental coacting flanging rolls, of a pair of horizontal guide rods mounted on the structure and positioned along and outwards of opposite sides of said bottom arm, and aA flanging hold-down attachment comprising a horizontally elongated bracket extending transversely across said bottom arm and having the ends .thereof removably connected to .said rods and also slidably mounted on said rods so that it is slidable to and from the one shaft, and a pair ofhorizontal laterally spaced arms projecting from the bracket inthe direction of said one shaft, mounted so that they are shiftable with said bracket, and adapted to overlie the top surface of a work piece during a yflanging operationl 3. In a metal working machine of the character described, thecombination with a C-shaped supporting structure, and a pair of power driven shafts mounted one at the outer end of the bottom arm' of the structure and the other for vertical adjustment at theouter end of the top arm of said structure, and having certain ends thereof positioned adjacentl one another and provided with complemental coacting iianging rolls, of a pair of horizontal guide rods mounted o-n the structure and positioned along and outwards, of

opposite sides of said bottom arm, and a flangingr hold-down attachment comprising a horizontally elongated bracket extending transversely across said bottom arm and having the ends thereof slidably mounted on the rods, and a pair of horizontal laterally spaced arms projecting from the bracket `in the direction of said one shaft, mounted so that they are conjointlly yshiftable with said bracket and are also adjustable horizontally to and from one another, and

elongated bracket extending transversely across said bottom `arm and having the ends thereof slidably mounted on the rods so that it is shiftable to and from the one shaft, and a pair of horizontal laterally spaced arms projecting from the bracket in the direction of said one shaft,

pivotally supported to swing horizontally to and Y from one another, and adapted to overlie the top surface of a work piece during a anging operation.

5. In a metal working machine of the character described, the combination with a C-shaped supporting structure, a pair of shafts mounted one at the outer end of the bottom arm of the structure and the other for'vertical adjustment at the outer end of the top arm of said structure, and having certain ends thereof disposed adjacent one another and provided with complemental coacting fianging rolls, and power driven mechanism for conjointly driving the shafts in opposite directions, of a pair of horizontal guide rods mounted onthe structure and positioned along and outwards of opposite sides of said bottom arm, and a anging hold-down attachment comprising a horizontally elongated bracket extending across said bottom arm and having the ends thereof slidably mounted on the rods so that it is shiftable to and from the one shaft, a horizontally elongated element overlying and extending parallel to the bracket and connected to said bracket for vertical adjustment, and a pair of horizontal laterally spaced arms connected to the element, projecting in the direction of said one shaft, and adapted to overlie the top surface of a work piece during a flanging operation. l

6. In a metal working machine of the character described, the combination with a C-shaped supporting structure, a pair of shafts mounted one at the outer end of the bottom arm of the structure and the other for vertical adjustment at the outer end of the -top arm of said structure, and having certain ends thereof disposed adjacent one another and provided with complemental coacting flanging rolls, and power driven mechanism for conjointly driving the shafts in opposite directions, of a pair of horizontal guide rods mounted onvthe structure and positioned along and outwards of opposite sides of said bottom arm, and a i'langing hold-down attachment comprising a horizontally elongated bracket extending across said bottom arm and having the ends thereof mounted on the rods, a horizontally elongated element overlying and extending parallel to the bracket and connected to said bracket for vertical adjustment, and a pair of horizontal laterally spaced arms con nected to the element so that they are adjustable horizontally to and from one another, projecting in the direction of said one shaft, and adapted to overlie the top surface of a work piece during a flanging operation. l

'7. In a metal Working machine of the character described, the combination with a C-shaped supporting structure, -a pair of shafts mounted one at the outer end of the bottom arm of the structure and the other for vertical adjustment at the outer end of the top arm of said structure, and having certain ends thereof disposed adjacent one another and provided with complemental coacting flanging rolls, and power driven mechanism for conjointly driving the shafts in opposite directions, yof a pair of horizontal guide rods mounted on the structure and positioned along and outwards of opposite sides yof said botto-rny arm, and a flanging hold-down attachment comprising a horizontally elongated bracket extending across said bottom arm and having the ends thereof slidably mountedon the rods so that it is shiftable to and from the one shaft, `a horizontally elongated element overlying and extending parallel to the bracket and connected to said bracket for vertical adjustment, f

and a pair ofV horizontal laterally spaced arms having rollers mounted rotatably thereon, pivotally connected toy said element so as toswingl horizontally to and from one another, projecting in the direction of said one shaft, and adapted to-have the rollers overlie and engage the top surface of a work piece during a angingoperation. V l i 8. In a metal working machine of the character described, the combination with a C-shaped supporting structure, a pair of shafts mounted one at the outer end of the bottom. armv of` the structure and the other for vertical vadjustment at the outer end of the top arm of said structure, and having certain ends thereof disposed adjacent one another and provided with complemental coacting anging rolls, andpower driven mechanism for conjointly driving the shafts in vopposite directions, of, a pair of horizontal guide rods mounted on. the structure land positioned along and outwardsof opposite sides of vsaid bottomv arm, and a flanging hold-down attachment comprising ahorizontally elongated bracket extending across said bottom arm and having the ends thereof mountedon the rods, a horizontal rock shaft carried by, overlying and extending parallel to, the bracket,V a pair of laterally spaced arms connected to the rock shaft and adapted when said rock shaft is rocked in one direction to assume an operative position wherein they overlie the top surface of a `work piece during a flanging operation, and releasable means for preventing reverse rocking of the rocky shaft whenthe arms are in their operative position.

9. In a metalworking machine of thefcharacter described, the combination with a C-shaped supporting structure, a .pair of shafts mounted one at the outer end ofthe bottom arm of the structure and the other for vertical adjustmentat the outer end of the top arm of said structure, and having certain ends thereof disposed adjacent' one another and provided with complemental co acting anging rolls, and power driven mechanism for conjointly driving the shafts in oppositedirections, of a `pair of horizontal guide rodsy mounted on the structure and positioned along and outwards of opposite sides of said bottomy arm, and

, a. fianging hold-down attachment comprising a horizontally elongated bracket extending across said bottom arm and having the ends thereofv mounted on the rods, a horizontal rock shaft overlying and extending parallel to the bracket and connected to said bracket for vertical adjust- Y ment, and a pair of laterally spaced arms connected'to the rock shaft and, adapted when said rock shaft is rocked in one direction to assume an operative position wherein they overlie the top surface of a work piece during a anging operation, and releasable means for preventing reverse l rocking ofY thelrock'shaftvwhen the ,arm-s arein their operative` position. Y

10. In a metal working rmachineof the character described, the combination witha C-shaped `supporting structure, a pairof, shaftsgmounted one at the outer end of the, bot-tom'arm Aofthe Istructure and the. other for vertical adjustment at the outer end of thetop arm koff said struc- ;ture, and. having .certain ends thereof vdisposed y s adjacent one another Yand provided with complelmental coacting hanging rollsan d'power driven mechanism` for` conjointly driving the shafts n in `opposite directions,vof .,a., pair of horizontal guide frods mountedon the structure and` positioned alongand outwards of opposite sides of said "bot-V tom arm, and a langing .hold-down, attachment comprising a horizontally elongated bracket extending across said bottom AarmpandY having the ends thereof mounted on the rods,'.a horizontal `rock shaft overlying and extending parallel to the bracket and lconnected to said bracketfor vertical adjustment, a pair of laterally spaced arms having rollers rotatably mounted thereon, connected pivotally to the rock shaft to swing to and structure andthe other for vertical adjustment,

at the outer end of thev top armjof said structure,

and having certain ends thereof disposed adjacent one anotherand provided withV complemental coacting Hanging rolls, and powerdriven mechanism for conjointly driving the vshafts in opposite directions, of a pair of horizontal Yguide rods mounted Von* the structure and positioned along and outwards of opposite sides of said' bottom arm, and a anging hold-down attachment comprising a horizontally elongated bracket extending over and across the bottom arm and having the ends-thereof slidably mounted on theV rods so that it is shiftable to and from the one shaft,`

a horizontal rock shaft overlying and 'extending parallel`to the bracket and connectedv to 4said bracket for vertical adjustment, anda pair'of laterally spaced arms adjustablyr connected to the rock shaft vso that they are shiftable to and from one another and adapted when the 'rock shaft is rocked in one direction to assume an'operative position wherein vthey overliethe top Vsurface of a work piece during a fianging operation, and releasable means for preventing reverse rocking of 'the' rock shaft when the arms are 'in their operative position. A v

12. In a metal working machine of thecharacter described, the combination with a C-shaped supporting structure, a pair'of -shaftsmounted one at the outer end' ofthe bottom arm of the structure and the other forrvertical adjustment at the outer end of the top arm ofsaid-structure, and having certain fends thereof disposed adjacent one another and provided with complemental coacting flanging rolls, and power driven mechanism for conjointly driving the -shaftsin opposite directions, of a pair of Ahorizontal guide rods mounted on the structure and positioned along and outwards of opposite sides of said bot-v tom arm, and a fianging hold-down attachment comprising a horizontally elongated bracket extended over and across said bottom arm, having the ends thereof mounted on the Irods, and provided with a pair of upstanding eye bolts with the eyes thereof ,aty the top, a horizontal rock shaft overlying and extending parallel to the bracket and having the ends thereof journalled in the eyes of the bolts, a pair of laterally spaced arms connected vto the rock shaft and adapted when the rock shaft is rocked in one direction to assume an operative position wherein they overlie the top surface of a work piece during a HangingY operation, and releasable` means for preventing reverse rocking of the rock shaft whenthe arms' are in their operative position.

13. In a metal Working machine of the character described, the combination with a C-shaped supporting structure, a pair of shafts mounted one at the outer end of the bottom arm of the structure and the other for vertical adjustment at the outer end of the top arm ofv said structure, and having certain ends thereofdisposed adjacent one another and provided with complemental coacting anging rolls, and power driven mechanism for conjointlydriving the shafts in opposite directions,` ofy a pair of horizontal guide rods mounted on the structure and positioned along and outwards of opposite sides of said bottom arm, and a langing hold-down attachment comprising a horizontally elongated i bracket extending over and across said bottom arm, having the ends thereof mounted on the rods, and -provided with a pair of vertically adjustable yeye bolts with the eyes thereof at the top, a horizontal rock shaft overlying and extendingparallel to the bracket and having the ends thereof journalled in the `eyes of the bolts,

l alpair of laterally spaced arms connected to the rock shaft and adapted when the rock shaft is rocked inone direction to assume an operative position wherein theyv overlie the top surface of a work piece during a flanging operation, and releasable means for preventing reverse rocking ofthe rock shaft when the arms are in their operative position. f

14. In a metal working machine of the character described, the combination with a C-shaped supporting structure, a pair of shafts mounted one at the outer end of the bottom arm of the structure and the other for vertical adjustment at the outer end of the top arm of said structure, and having certain ends thereof disposed adjacent' one another and .provided with complemental coacting langing rolls, and power driven mechanism for conjointly driving the shafts in opposite directions, of a pair of horizontal guide rods mounted on the structure and positioned along and outwards of opposite sides of said bottom arm, and a anging hold-down attachment comprising abracket extending over and across said bottom arm, having the ends thereof slidably mounted on the rods so that it is shiftable to and from said one shaft, and provided at its ends with a pair of vertically adjustable eye bolts with the eyes thereof at the top, a horizontal rock shaft overlying and extending parallel to the bracket and having the ends thereof journalled ,in the eyes of vthe bolts, a pair of laterally spaced arms having'rollers -rotatably mounted thereon, connected to the rock shaft so that they are adjustable to and from oney another, and adapted when the rock shaftv s rocked in one direction to assume an operative position wherein the rollers thereon overlie and engage the top surface of a work piece during-a Hanging operation, and releasable means for preventing reverse rocking of the rock shaft when the arms are in their operative position.

15. In a metal working machine of the character described, the combination with a C- shaped supporting structure, a pair of shafts mounted one at the outer end of the bottom arm of the structure and the other for vertical adjustment at the outer end of the top arm of said structure, and having certain ends thereof disposed adjacent one another and provided with complemental coacting flanging rolls, and a power driven mechanism for conjointly driving the shafts in opposite directions, of a pair of horizontal guide rods mounted on the structure and positioned along and outwards of opposite sides of said bottom arm, and a flanging holddown attachment comprising abracket extending over and across said bottom arm, having the ends thereof slidably mounted on the rods so that it is shiftable to and from said one shaft, and provided at its ends with a pair of adjustable eye bolts with the eyes thereof at the top, a horizontal rock shaft overlying and extending parallel to the bracket and having the ends thereof journalled in the eyes of the bolts, a pair of laterally spaced arms pivotally connected to the rock shaft so that they are capable of swinging to and from one another and adapted when the rock shaft is rocked in one direction to assume an operative position wherein they overlie the top surface of a Work piece during a flanging operation, 'and releasable means for preventing reverse rocking of the rock shaft when the arms are in their operative position.

16. In a metal working machine of the character described, the combination with a C-shaped supporting structure, a pair of shafts mounted one at the outer end of the bottom arm of the structure and the other for vertical adjustment at the outer end of the top arm of said structure, and having certain ends thereof disposed adjacent one another and provided with complemental coacting flanging rolls, and power driven mechanism for conjointly driving the shafts in opposite directions, of a pair of horizontal guide rods mounted on the structure and positioned along and outwards of opposite sides of said bottom arm, and a flanging hold-down attachment comprising a horizontally elongated bracket positioned above and across said bottom arm, having the ends thereof mounted on the rods, and provided at its ends with vertically adjustable upstanding eye bolts with the eyes thereof at the top, a horizontal rock shaft overlying and extending parallel to the bracket and having the ends thereof journalled in the eyes of the bolts, a pair of arms connected to the shaft and adapted when the rock shaft is rocked in one direction to assume an operative position wherein they overlie the top surface of a work piece during a flanging operation, and releasable latch means between the bracket and the rock shaft for preventing reverse rocking of said rock shaft w'hile the arms are in their operative position.

1'?. In a metal working machine of the character described, the combination with a C-shaped supporting structure, a pair of shafts mounted one at the outer end of the bottom arm of the structure and the other for vertical adjustment `at the outer end of the top arm of said structure,

and having certain ends thereof disposed adjacent one another and provided with complemental coacting flanging rolls, and power driven mechanism for conjointly driving the shafts in opposite directions, of a pair of horizontal guide rods mounted on the' structure and positioned along and outwards of opposite sides of said bottom arm, and a flanging hold-down attachment comprising a bracket positioned above and across said bottom arm, having the ends thereof slidably mounted on the rods so that it is shiftable to and from the one shaft, and provided at its ends with vertically adjustable upstanding eye bolts with the eyes thereof at the top, a horizontal rock shaft overlying and extending parallel to the bracket and having the ends thereof journalled in the eyes of the bolts, a pair of arms having rollers rotatably mounted thereon, adjustably connected to the shaft so that they are shiftable to and from one another, and adapted when the rock shaft is rocked in one direction to assume an operative position wherein the rollers thereon overlie and engage the top surface o-f a work piece during a flanging operation, and releasable latch means between the bracket and the rock shaft for preventing reverse rocking of said rock shaft while the arms are in their operative position.

18. In a metal working machine of the character described, the combination with a C-shaped supporting structure, a pair of shafts mounted one at the outer end of the bottom arm of the structure and the other for vertical adjustment at the outer end of the top arm of said structure, and having certain ends thereof disposed adjacent one another and provided with complemental coacting flanging rolls, and power driven mechanism for conjointly driving the shafts in opposite directions, of a pair of horizontal guide rods mounted on the structure and positioned along and outwards of opposite sides of said bottom arm, and a anging hold-down attachment comprising a bracket positioned above and across said bottom arm, having the ends thereof slidably mounted on rthe rods so that it is shiftable to and from the one shaft, and providedat its ends with vertically adjustable upstanding eye bolts with the eyes thereof at the top, a horizontal rock shaft overlying and extending parallel to the bracket and having the ends thereof journalled in the eyes of the bolts, a pair of arms having rollers rotatably mounted thereon, pivotally connected to the shaft to swing to and from one another, and adapted when the rock shaft is rocked in one direction to assume an operative position wherein the rollers thereon overlie and engage the top surface of a work piece during a flanging operation, and releasable latch means between the bracket and the rock shaft for preventing reverse rocking of said rock shaft While the arms are in their operative position.

JOHN J. MCGLONE. ROBERT I. ANDERSON.