US2586376A - Machine for stripping sheet metal - Google Patents

Description

Feb. 19, 1952 J. B. PICTON MACHINE FOR STRIPPING SHEET METAL 4 Sheets-Sheet 1 Filed July 27, 1950 INVE TQR: w m

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Feb. 19, 1952 J. B. PICTON MACHINE FOR STRIPPING SHEET METAL Filed July 27, 1950 4 Sheets-Sheet 2 INVENTQ? P T.

9 J. B. PICTON 2,586,376

MACHINE FOR STRIPPING SHEET METAL Filed July 27, 1950 4 Shegts-Sheet 5 2x0 He's. 3%

J. B. PICTON MACHINE FOR STRIPPING SHEET METAL Feb. 19, 1952 4 Sheets-Sheet 4 Filed July 27, 1950 S 42 e n 6 Arryir Patented Feb. 19, 1952 UNITED STATES OFFICE? MACHINETFOR. STRIPPINGQSHEETv METAL.- v

J ohn Bu'rlcy Picton," Wolverhampton; England,"

assignor to Jo'shua Bigwoodi z SGmLimited,

Wolverhampton, England, a British company";

Application July 27,1950, SeriaJlNo. 176,096 In Great Britain July 30.'i194.r

15. Claims;

transport and storage. 1. In particular the inven-- tion :relatesto. winding machine's having a rotarydriven winding drum and in operative association therewithxsan unloadersxlevice for removing :the coiled shect-metal-from'the drum in an'axial directionsupon completion of'ithc coiling process.-

Such machineswill hereinafter be referred to-as Winding machines: of the kind specified.

Inxwindingrmachines of the kind specified as hitherto constructed the drum is provided with a longitudinal slot extending across its sheet engaging face inan axial direction forthe -pur--- pose of receiving the: leading end of the sheet so that: at. the commencement of winding-the drum may effect a purchaseaonthe former;

It is sometimes found diflicult to remove the completed coil from the drum because the stressed conditionrof the materialof' the'coil' causes the endWhich-is received :in thehslotrto bind against 1 the walls thereof.

The object of the; present'invention isto pro vide an improved "construction with a view to eliminating :or reducin'gthis tendency.

With this object in "view "a winding-:machine of the-kindspecified constructed inaccordance with the present invention-:has a winding "drum which isprovided with a guideway extending lon gitudinallywith respect to the axis of rotation of---' the drum, saidguideway carrying orbeing adapted .to carry a slide movable endwisealong and out of the .guideway and said slide having an open-v.

wise-out" of the 'guideway concurrently with unloading of the, coiled sheet off the drum Sin'ce'the slide is designed for "free; endwise movement along the-guideway at the appropriate time any binding of theend -of:thesheet in the:

slide will notinhibitunloading and; the; s1ide;can be removed from the sheet. after :theyunloadinge. process,. the provision of: more than. one slide:

enablingtsubstantially, continuous useto be made.

of the winding machine.

Whilst applicablegenerally, as for instance fore windingfla single sheet .of. meta1 .through a pre- 2. treatment apparatus 1 and into coiled form --on the drumtheprimaryand most advantageous applicationof theinventionis to-Windingmachines of the--kindspecified for use in coiling simulta neously and in side-by-side relationship on a common drum'a plurality of strips of sheet metal. I For'instancewthe metalmay initially be in the form ofa single sheet and-the pre-treatment ap-- paratus may comprise a slitting machine, the cutters or slitting tools of which cut-thesingld sheet into a plurality of --side-.b5' -sicle stripsas the winding machine draws the sheet therethrough'. Alternatively, as another -example,- a plurality'of side-bY-side strips may'requi-reto be subjectedto achemical-pre-treatment process in an apparatus through which they require to be drawn; In suchi cases, it has been found 'in practice that with conventionaL-winding-machines of the kind specified I the inner 1 ends of adjacent coiled strips of sheet metal-tendto bemoved into' overlapping relationship during the unloading proc essthus accentuating any possible binding or jamming- 0ftliese ends -in the slot in the winding drum or '=causing =-unwindingofthe. inner turns of the coils;

This tendency is entirely' obviated-nr reduced to a very great extent by 'use==of-- a windingmachine constructed in accordance with the invention;

The invention will now be described with ref erence :to the accompanying drawings; wherein Figure l shows a general arrangement of 'a winding machine constructed in-accordance with, the-invention as seen :in' plan;-

Figure 2 isa fragmentary view of the 'wind- I ing :drum seenin end elevation;

Figure '3' isa further fragmentary view-showingthewindihg drum in sideele'vation; the upper part of the drum-andthe pusher plate being shown in cross section."

means forrusewithza winding .drum as illustrated; I in Figure 3.

Figure -6--is-a vvie,w. of the construction of slide" shown in,Figure Bin cross-esectiononthe =-line 6-6 ofFigure 5.

Figure 7 Tis. .afragmentary viewwshowing; in ende elevation and in crossasectionone-the line -'|-'l 3 (Figure 8) another construction and Figure 8 is a further fragmentary view of the construction shown in Figure 7 in side elevation and in cross section on the line 88 of Figure 7.

As seen in Figure 1, the machine comprises a winding drum I driven through a shaft H and a reduction gear box 12 from an electric driving motor [3 all of which are supported upon a suitable bed structure l4. At the rearward end of the winding drum I0 is provided an unloader device l5 for displacing in an axial direction forwardly of the forward end of the drum, the coil or coils of sheet or strip metal wound thereon on completion of winding operations.

In addition to these parts and at a position spaced radially outwardly from the surface of the drum there is provided a coil gripping and holding device It, the function of which is to support finished coils during and after their removal from the drum to permit these coils to be bound with wire and thus secured against uncoiling, during which process the winding drum can be employed for coiling fresh sheet or strip material. The device is is described and claimed in my co-pending application Numbered 172,101, entitled improvements relating to machines for slitting and coiling sheet metal, and filed on July 5, 1950, now patent No. 2,579,700, dated December 25, 1951, and will not therefore be further described in the present specification.

The machine illustrated in Figure l is intended primarily for winching and coiling a sheet of metal subjected to pre-treatment in a slitting machine so that in fact after the metal has been drawn by the winding machine through the slitting machine it is in the form of a plurality of strips of sheet metal lying side by side.

Whilst this is the primary and intended use of the machine it is contemplated that it may be put to other uses, for example, drawing one or more strips of sheet metal and in the latter case, these strips lying side by side through another form of pre-treatment apparatus, for example, a chemical apparatus in which is carried out one step of a finishing process.

In the illustration shown in Figure l the winding drum I0 is indicated generally and may be of either of a number of alternative forms, one of which is illustrated in Figures 2 and 3 and another of which is illustrated in Figures 7 and 8.

Referring firstly to the construction shown in Figures 2 and 3, the winding drum is a cylindrical structure, the cylindrical wall I! of which has formed therein a guideway l8, of which the side walls [9 diverge from each other in a direction towards the central region of the drum, the base 20 of the guideway 18 being fiat and parallel to a tangent to the circumference of the drum at the mid-point of the guideway.

The guideway extends across the whole length of the circumferential surface of the drum and is open at the forward end of the drum.

Mounted in the guideway is a slide having a body 2| of elongated form and of cross-sectional shape conforming to that of the guideway so that the slide is free to move endwise along the guideway and can, when required, be completely expelled from the guideway through the open end thereof.

For this purpose the slide is provided with a radially projecting head 22 formed on an end plate or member 23 secured in any suitable manner to the body of the slide as, for instance, by means of countersunk screws 24.

of winding drum 4 Extending the length of the body is a sheet receiving opening or slot 25, the term sheet receiving opening being used in the generic sense and including the case where the sheet material is in the relatively narrow form of a single strip or a plurality of strips arranged side-by-side as when the winding machine is used in conjunction with the slitting machine.

This slot or opening 25 extends inwardly towards the central region of the drum but instead of extending in the true radial direction is tangential to a small diameter pitch circle concentric with the axis of rotation of the drum.

The sense of the inclination of the slot or opening with respect to the true radial direction is such that the slot or opening forms an acute angle with the circumferential face of the drum seen generally at 26, on the leading side of the slot, (having regard to the direction of rotation of the drum indicated by the arrow (Figure 2)) and an obtuse angle on the trailing side of the slot or opening. By inclining the slot or opening in this manner the insertion of the leading end of the sheet material is facilitated and after the drum has rotated through a comparatively small angle an adequate purchase is obtained against the sheet material by reason of the bending of the sheet material as seen in Figures 2 and 4.

In the form of slide illustrated in Figure 4, the body of the slide is of one piece construction and of a rigid character, the thickness of the slot or opening 25 being only just greater than the thickness of the sheet material required to be received in the slot or opening in order that the purchase already referred to may be readily effected.

After a single revolution of the drum upon commencement of winding, the second turn of the coil so formed will bear inwardly against that portion of the sheet material received in the slot or opening and will anchor same firmly in position.

Preferably and as shown in Figure 4, the guideway is accommodated wholly beneath the circumferential surface of the drum and the outer face of the body of the slide as seen at 21, is of curved form having a radius of curvature equal to that of the drum so as to form a continuation of the surface thereof and lie flush with same.

In an alternative form of slide intended for use with a guideway of rigid character as illustrated in Figures 2 and 3, is shown in Figures 5 and 6, the body of the slide here being of two part construction as seen at 28 and 29, these two parts forming side members secured together by bolts, 9 and having opposed parallel walls 30 and 3| defining the sheet receiving slot or opening 32.

The side member 29 is further provided with locking means for retaining the sheet material frictionally in the slot or opening 32, comprising a spindle 33 having keyed or otherwise fixed thereto a plurality of gripping cams 34, portions of which project, as seen in Figure 6, into the slot or opening 32 so as to bear against one face of the sheet material received therein. The end of the spindle 33 is squared as at 35 to enable a suitable removable key or handle having a squared socket to be engaged therewith for the purpose of rotating the spindle and earns.

On completion of a coiling operation when it is required to move the coil or coils formed on the drum unloader device 15, comprising an annular at the rearward end thereof moves endwise over thedrumjay means of-hydraulic piston-and. cylin-..

der units 31; (Figure 1 .z

This plate pushes: against: the sides of-the-.coi1s-.. propenand the: plate .is provided at, its inner edge withaa backwardly setfiange-member 38 having, a block orfacing .39 positionedto engage througha slotiinithe plate with a rearward- :face of :;the

36 are: operative.simultaneouslyrand the :mainportionpf thecoilsor. coils is thus moved. simultaneously: togetherwith the slide. inranaaxial; direc-W tionalong and off the-drum;-

lnlthegconstruction. of drum-shown .in. Figured? and .8. themdrumis again of hollow cylindrical'formation butinsteadeof. the guideway being rigid,

thcwallof the; drum includes two :portions M. and

42 pivotally, connected together by a pintle 43 ex-1 tending parallelv tothe .axis ofrotationzof the drum and spaced inwardly: of said wall.

The.;guide,way is formed. partly in the portion 42 ;and,.:par,tly in the .prtion4l,' ivotal. movement;; of those portions relativelyto each other resultingzgin movement of the inwardly diverging walls; 44, and;45 of the guidewaytowards or away from ;each V-other. depending upon the direction of sueh pivotaltmoyement; The width ofthe guideway-is. thus; contracted .or expanded.

For;= employment-with:this -,.construction .of

drum; the; slide 1comprises,-two; side .members 46:

andjl; engaged withgthe opposite walls44. and 45, of the guideway respectively and with base portions of the guideway formed respectively in the portions--44 and 42.. of the drum wall, the inner facesof these side: members, being spaced apart' anddefining a sheet receivingslotor opening 48. The side membersAGand 4! of the slide are movable towards and ,away from eachother in response to-thepressure exerted by the side walls 44 and 45 of, theguideway and whena sheet or strip isreceived in theslot,;48 such inward pres-,

sure serves both to grip; the sheetvfrictionally in .1

the, slot andto clamp the slide in the guideway.

For effecting relative pivotal movement of; the portions 4| and 42: any suitable mechanism mayv be provided foryexample, the drum wall mayinelude a ,further pivotal portion 50 having at one longitudinaledge a facingmember 5| engaging a co-oper,ating .facingmember 52 on the portion 42, the engaging faces of these members being in clinfid-tothecircumferential face of the drum so that pivotal movement of the portion 50 transmits ivctalmovementto the portion 42.

Movementof the, portion 50 about its mounting pintle 53 is controlled by a screw andnut gear of whichtheiscrewis seen at 54 and is pivotally connected to theportion 50 and of which the nut 55 is 'journalled in a bearing block 56 secured to the portion 41 and rotatable by means of bevel gearing 51-.

Two screws 54 are provided spaced axially apart and likewise two sets of bevel gearin 51, the driving Jewels of which are mounted on a common operating shaft 58'projecting from the forward endof, the drum, and squared for engagement with a squared socket on a removable key or handle,

The ,portion 42 ismaintained with its facing member. 52 in contact with the facing member 5! by means Of acoiled tension spring 60 anchored:

at one end as indicated at 6| to the portion 41.

and at the otherend to, ailweb, 62 "on-the. portion 42.

Although not shown in thedrawings. the wind-s ing drum shown in-Figures-l to..5 may and prefer ably does incorporatea conventionalcollapsing 1-, flapsuch as the member'til seen in Figure -7 in::. order to free the inner turn of a coil to facilitate unloading. If desired,,two.flaps, suchas 50 and; 42, may be incorporated, the latter however .not:-;

including any portion of the guideway.

What I claim then is 1. In a winding. *machine; a rotary winding drum; means for rotatingsame, said drum having a guideway extending longitudinally with respectf to the axis of rotation of the drum; a slide in said... guideway mounted for; endwise expulsion there from, said slide. having an open 'mouthed sheet. receiving openingextending lengthwise in rela tion to said guideway and inwardly towardsthe --central region of the drum to form an anchoragefor the leading end of the sheet; and, an unloader device including a member movable axially-in relation to the drum and engageable with said slide to expel same endwise from the guideway.

2.'In a winding machine; a rotary-winding drum; means'for rotating same; said drumhaving an open ended guideway positioned beneath the surface of the drum and extending -longitudi-- nally with respect to the axis of rotation of the wardly towards the central region of the drum to form an anchorage for the leading end of the sheet; and, an'unloader device including a member movable axially in relation'to the drum and engageable with said slide to expel same endwise from the guideway.

drum; means for rotating same; said drum having an open ended guideway having side walls diverging from each'other in the inward direction towards the central region of the drum, said guideway being positioned beneath the surface of sheet receiving opening extending lengthwise in relation to said guideway'and inwardly towards the central region of -the drum to form an an' chorage for theleading end of the sheet; and an unloader device including ;a member movable axially in'relation to the drum and engageable with said'slide to expel same endwise from the guideway.

4. In a winding-machine; a rotary winding drum; Vmeans forrotating same; said drum hav- .ing an open ended guideway extending longitudinally with respect to the axis of rotation of the 3. In a winding machine;- a rotary winding--- drums; saidguideway having side walls movable relatively towards and away from each other; a slide in said, guideway mounted for endwise ex-. pulsiontherefrom, said slide having an open receiving opening extending gageable' with said slide" to expel same endwise from theguideway 5. In a winding machine; a hollow rotary winding drum of generally cylindrical formation; means for rotating same; the cylindrical wall of the drum including at least two portions pivotally connected together about an axis parallel to the axis of the drum and spaced inwardly of said wall, a guideway formed partly in one of said portions and partly in the other, said guideway extending longitudinally with respect to the axis of rotation of the drum; and having opposed side walls movable towards and away from each other during pivotal movement of one of said portions relatively to the other; a slide in said guideway mounted for endwise expulsion therefrom, said slide having an open mouthed sheet receiving opening extending lengthwise in relation to said guideway and inwardly towards the central region of the drum to form an anchorage for the leading end of the sheet; means on said drum for controllably moving one of said drum wall portions relatively to the other about their common pivotal axis to clamp or release said slide; and an unloader device including a member movable axially in relation to the drum and engageable with said slide to expel same endwise from the guideway.

6. In a winding machine; a hollow rotary winding drum of generally cylindrical formation; means for rotating same; the cylindrical wall of the drum including two portions pivotally con-. nected together about an axis parallel to the axis of the drum and spaced inwardly of said wall; a guideway formed partly in one of said portions and partly in the other, said guideway extending longitudinally with respect to the axis of rotation of the drum and having opposed side walls movable towards and away from each other during pivotal movement of one of said portions relatively to the other; a slide in said guideway mounted for endwise expulsion therefrom, said slide having an open mouthed sheet receiving opening extending lengthwise in relation to said guideway and inwardly towards the central region of the drum to form an anchorage for the leading end of the sheet; said drum wall having a third portion pivotally connected adjacent one longitudinal edge to one of the first said portions about an axis parallel to the axis of the drum and spaced inwardly of said wall, and having at its other longitudinal edge a bearing face inclined with respect to the cylindrical face of the drum and engaging a co-operating face on the other of the first said portions, controlling mechanism housed in said drum for moving said third portion angularly about its pivotal axis to effect relative sliding of said co-operating faces and movement of said opposed guide walls towards and away from each other, said controlling mechanism including an operating member positioned and accessible externally of the drum; and an unloa'der device including a member movable axially in relation to the drum and engageable with said slide to expel same endwise from th guideway.

7. In a winding machine; a hollow rotary winding drum of generally cylindrical formation; means for rotating same; the cylindrical wall of the drum including at least two portions pivotally connected together about an axis parallel to the axis of the drum and spaced inwardly of said wall, a guideway formed partly in one of said portions and partly in the other, said guideway extending longitudinally with respect to the axis of rotation of the drum, and having opposed side walls movable towards and away from each other during pivotal movement of one of said portions relatively to the other; a slide in said guideway mounted for endwise expulsion therefrom, said slide having an open mouthed sheet receivin opening extending lengthwise in relation to said guideway and inwardly towards the central region of the drum to form an anchorage for the leading end of the sheet; controlling mechanism housed in said drum including a member movable towards and away from the centre of the drum and engaging one of said portions to efiect pivotal movement thereof relatively to the other portion, a rotary spindle journalled in bearings fixed to said other portion, and a screw and nut reduction gear operatively interposed between said spindle and said member; and, an unloader device including a member movable axially in relation to the drum and engageable with said slide to expel same endwise from the guideway.

8. In a winding machine; a rotary winding drum; means for rotating same; said drum having a guideway extending longitudinally with respect to the axis of rotation of the drum; a slide mounted in said guideway having an elongated body housed in the guideway and slidable endwise therein, said body having an open mouthed sheet receiving opening extending lengthwise in relation to said guideway and inwardlytowards the central region of the drum to form an anchorage for the leading end of the sheet; and said slide having a head projecting outwardly from the mouth of said guideway, and an unloader device including a member movable axially in relation to the drum and engageable with said head to expel the slide endwise from the guideway.

9. In a Winding machine; a rotary winding drum; means for rotating same; said drum having a guideway extending longitudinally with respect to the axis of rotation of the drum; a slide mounted in said guideway having an elongated body housed in the guideway and slidable endwise therein, said body having a narrow sheet receiving slot of width only just greater than the thickness of the sheets which it is required to handle, said slot extending lengthwise in relation to said guideway and inwardly towards the central region of the drum in a direction tangential to a pitch circle concentric with the axis of rotation of the drum but of smaller diameter, so that, having regard to the direction of rotation of the drum, the slot walls and the outer face of the drum form an acute angle on the leading side of the slot and an obtuse angle on the trailing side; and, an unloader device including a member movable axially in relation to the drum and engageable with said slide to expel same endwise from the guideway.

10. In a winding machine; a rotary winding drum; means for rotating same; said drum having a guideway extending longitudinally with respect to the axis of rotation of the drum; a slide mounted in said guideway having an elongated body housed in the guideway and slidable endwise therein, said body having an open mouthed sheet receiving opening extending lengthwise in relation to said guideway and inwardly towards the central region of the drum; locking means on said body including a movable member positioned to engage with one face of the portion of a sheet in the opening and retain same therein; and, an unloader device including a member movable axially in relation to the drum and engageable with said slide to expel same endwise from the guideway 11. In a winding machine; a rotary winding drum; means for rotating same; said drum having a guideway extending longitudinally with respect to the axis of rotation of the drum; a slide mounted in said guideway having an elongated body housed in the guideway and slidable endwise therein, said body having an open mouthed sheet receiving opening and a spindle journalled' in and extending lengthwise along the body and the central region of the drum, said guideway being positioned beneath the surface of the drum and extending longitudinally with respect to the axis of rotation of the drum; a slide mounted in said guideway having an elongated body of crossfsectional shape conforming to that defined by said inwardly diverging walls of the guideway and slidable endwise therein, said body having an" open mouthed sheet receiving opening extending lengthwise in relation to said guideway and in-' wardly towards the central region of the drum to form an anchorage for the leading end of the sheet; and, an unloader device including a member movable axially in relation to the drum and engageable with said slide to expel same end wise from the guideway. 13. In a winding machine; a rotary winding drum; means for rotating same; said drum having an open ended guideway extending longitudinally with respect to the axis of rotation of the; drum; said guideway having side walls movable relatively towards and away from each other; a

slide mounted in said guideway having an clon gated body housed in the guideway and slidable endwise therein, said body including relatively movable side members spaced apart to definean open mouthed sheet receiving opening extending lengthwise in relation to said guideway and inwardly towards the central region of the drum to form an anchorage for the leading end of the sheet; said side members engaging the movable Walls of the guideway means onsaid drumfor' adjusting the relative position of said walls'to clamp or release the slide in or from the guideway and simultaneously to clamp or free a sheet portion received in said opening; and, an unloader device including a member movable axially in relation to the drum and engageable with said slide to expel same endwise from the guideway.

14. In a winding machine; a rotary winding drum; means for rotating same; said drum having a guideway extending longitudinally with respect to the axis of rotation of the drum; a slide in said guideway mounted for endwise expulsion therefrom, said slide having an open mouthed sheet receiving opening extending lengthwise in relation to said guideway and inwardly towards the central region of the drum to form an an-r chorage for the leading end of the sheet; and an unloader device including members adapted to engage substantially simultaneously with one side of a strip metal coil on the drum and with said slide whereby the former together with the slide is unloaded off the drum with the inner end of the coil retained in the slide.

15. In a winding machine; a rotary winding drum; means for rotating same; said drum having a guideway extending longitudinally with respect to the axis of rotation of the drum; a slide mounted in said guideway having an elongated body housed in the guideway and slidable endwise therein, said body having an open mouthed sheet receiving opening extending lengthwise in relation to said guideway and inwardly towards the central region of the drum to form an anchorage for the leading end of the sheet; and said slide having a head projecting outwardly from the mouth of said guideway; and an unloader device including a pusher plate having an opening in register with one end of the drum, means for moving said plate axially in relation to the drum to engage the plate with a strip metal coil thereon, said plate having a backwardly set flange portion at its inner edge positioned to engage simultaneously with the head of the slide.

JOHN BURLE Y PICTON.

REFERENCES CITED UNITED STATES PATENTS Name Date Leroy et al Mar. 4, 1947 Number

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