US1868341A - Bending roll - Google Patents

Description

IWI/JM@ M f 2 Sheets-Sheet l A. T. YATES A BENDING ROLL Filed Nov. 29, 1950 July 19, 1932.

A. T. YATES BENDING ROLL July 19,l 1932.

2 Sheets-Sheet 2 Filed Nov. 29, 1950 Patented `Iuly 19, 1932 gJNI'I'ED STATES PATENT OFFICE ARTHUR T. 'YATES, OF WEST SENECA, NEW YORK, ASSIGNOR TO BUFFALO FORGE COM- PANY, OF BUFFALO, NEW YORK lo' of improved construction for readily adjust- BENDING ROLL This invention relates to rolls of the type used in connection with bending machines.

The objects of this invention are to provide rolls for bending machines which comprise a number of parts adjustable relatively to each other lengthwise of the axes of the rolls to adapt the rolls for use in connection with work of different cross sectional shapes; also to provide rolls of this kind with means ing the several parts of the rolls relatively to each other; also to provide a bending machine of this kind in which one of the rolls may be arranged to rotate about its shaft to curvature of the inner and outer faces `of the work which is being rolled; also to provide rolls of this kind with mechanism of improved construction for adjust-ing the parts of the rolls relatively to each other; also to improve the construction of rolls of this kind in other respects hereinafter specified.

In the accompanying drawings:

Fig. 1 is a fragmentary elevation of a bending machine provided with rolls embodying this invention;

Fig. 2 is a fragmentary cross sectional view thereof; approximately on line 2 2, Fig. 1, on an enlarged scale, showing the rolls operating on a different piece of work than that shown in Fig. 1;

Fig. 3 is a fragmentary section thereof, on line 3 3; Fig. 1, on a still larger scale;

Fig. 4 is a sectional View thereof similar to Fig. 2; but showing a dierent adjustment of the parts of the rolls to enable the rolls to be used for bending flat bars latwise;

Fig. 5 is a similar fragmentary section, showing the rolls adjusted for bending an angle bar with its radial flange extending from the other flange in a direction away from the axis of curvature;

Fig. 6 is a similar fragmentary view, showing the rolls adjusted for rolling an angle bar with its radial flange extending from the other flange in a direction toward the axis of curvature;

Fig. 7 is a fragmentary section thereof, on line 7 7, Fig. 2:

Serial No. 498,996.

Fig. 8 is a similar section taken on line 8 8, Fig. et;

Fig. 9 is a section thereof on line 9 9, Fig. 2.

Fig. 1 illustrates this invention as applied to a bending machine, in which the three roll shafts are arranged horizontally, but it will be understood that it is not intended to limit this invention to this type of bending machine, since the rolls embodying this invention are equally applicable to bending machines in which the roll shafts extend in any other direction. In the particular machine illustrated in Fig. 1, A represents the frame of the machine and B, C and D the three bending rolls. The bending machine shown is also provided with the usual guide rolls E for preventing twisting of the work. This particular invention, however, relates only to the construction of the three bending rolls of the machine, and the roll B will hereinafter be referred to as the inner roll, since it is nearer to the adix of curvature, about which the work is bent; and the rolls C and D will be referred to as the outer rolls.

The inner roll B is mounted upon a shaft 10 and the two outer rolls are each mounted on a shaft 11. Since the two outer rolls are identical in construction; only one of them will be hereinafter described. The rolls shown are constructed so as to bend flat strips both flatwise and edgewise and to bend angle bars either with a fiange extending inwardly toward the center of curvature, or with a flange extending outwardly. It will be understood, however; that it is not intended to limit this invention to rolling the particular shapes shown in the drawings7 since obviously the rolls could be used to roll material of other cross sectional shapes without departing from the scope of this invention.

In the particular construction shown; the inner roll includes a substantially cylindrical outer sleeve or part 14, which is located nearest to the outer end of the shaft 10, and an intermediate sleeve part of the same outside diameter as the sleeve 14 and provided on its inner face with an annular recessed portion 16. The roll also includes a ring shaped inner part 17; the outer periphery of which is preferably of the same diameter as for example, bymeans of screws or studs 33 thatof the parts 14 and 15 and the inner portion of which has an extension 18 adapted to enter into the recess 16 of the intermediate roll part 15. By adjusting these three sleeves lor rings relatively to each other, the inner roll B can be adapted to cooperate with work of different cross sectional shapes.v

Y The outer rolls C and D are-also each pro-k vided with three separate sleeveor ring parts, the outer part 2O being the 5 largest of the three and havingon its inner face an under-j-` cut annular recess 21 into and out of which an intermediate part or member22 ofthe roll as the part 20.y Preferably, the roll part 23 has a slight projection 24 near the inner portion thereofwhich is adapted to enter into a corresponding Igroove in the'roll member 22.Y In each of the rolls, the inner parts'17 and 23 arenotadjustable and are preferably frictionally orV otherwise held against move-l ment lengthwise of the roll shafts. The `outer and intermediate parts of the rolls are ad'-v -j'ustable lengthwise of the roll shafts toadapt the rolls for the various shapes on whichthey are to operate. rThe several parts of each bending roll C and I) may be lheld against rotation about their respective roll shafts 11 in any suitable -or desired manner, for eX- am'ple,in the case Lof the outer rolls, by a key 25 iitting in lreyways formed inthe roll shaft and parts in each outer roll. rlhe'parts' 14,

15 and k1-7 of Vthe inner roll may be held' against turning` relatively 'to the shaft 10 by means of ay lrey'27 shown in Figs-j4, 5 and 8'. An 'eyebolt '28fmay 'be screwed into the end offthis key to facilitate removing of the same, if desired. n l Y .j j

Thefmeans for adjusting the outer and inter'mediate parts of the rolls toward and from the inner parts 'and each other, 'and for Y holding the lparts in adjusted positions during A`theuse of the machine maybe kof any suitable or desired construction, the vparticular `adjusting' means shown in the drawings 'being merely'an'example of one form of such means usable in 'connection with my invention, i Since the adjusting means for all Vof the'three rolls shown is'substantiallythe same, one description applies to all of the three adjusting mechanisms. .Y y

The 'out-er parts 14'a'nd 2O Vrof the rolls are preferably'adjusted lengthwise of their roll shafts by adjusting means connecting each of these parts with the roll-shaft on which it 'isinounted `'In the construction shown for 'thispu'r'posa the end of each'roll shaft is pro- 'Avided'witlh a'threaded hole 30 in which a correspondingly threaded stud` j 31 engages. Upon turning this stud, Athe lengthwise nieveinent ofthe. stud is imparted to a plate or member 32 'which is suitably secured to the outer part of Vits rollin any suitable manner,

(Fig. 1) passing through holes in these plates and engaging threaded holes in the outer roll part. In order to impart lengthwise movement to the outer part of a roll when the stud 31 is turned, a suitable connection is formed between the plate 32 and the stud 31, which connection may, for example, include an integral flange 34 on thelstud 31 and a pair of nuts or threaded collars 36 and 37. VAs shown in theV drawings, an integral collar 34 engages the ginner face of the connecting member or plate 32 and the nut 36 engages the outer face, the nut 37 acting asa lock nut to hold the nut 36 in the desired position, so as to permit free rotation of the stud 3l relatively to the connecting member l32. To facilitate turning yof the' stud 31, the endf of the stud may be provided withl a part'38 which may be engaged by a wrench ,orvother tool for turning the (stud. After-the desired adjustment of the outer roll part has been effected,- 'the stud can be ul-oclred against turning by turning the nut 36 in a direction to clampthe stud tothe connecting member or plate 32, and the nut 37 may be used as afloclr nut in lthe usual manner." By' means of this construction, it will beobvious'y that by turning the lstud 31 in either direction, the connecting plate or member 32 will be moved. toward or from the end of the. roll shaft, carryingvwith it the outer part'ofthe roll, but any other means for adjusting the outeriroll part relatively to' the shaftV and for holding this part in its adjusted position' may be provided.

' The intermediate part of each roll, which isthe part 15 of the innerroll or the 'part 22 of an outer roll, may also be adjusted lengthwise of its shaft or of the outermost roll part in any suitable manner. In the construction shown, these adjusting means are mounted on the outermost roll part or on the connecting plate or member 32 secured to the outermost roll part and, therefore, forming a part thereof; yF or this purpose, va plurality of rods 40 are provided, which extend through holes lengthwise offthe outer roll part, the inner ends -o'f the rods being rigidly secured to the intermediate' roll parts. VIn the inner roll three-of these rods 40 are provided, and in each of the outer rolls four of these rods are shown.` Any desired number, however, may be used in either roll.Vv Ihe outer portions Vof these 'rods Vare threaded, and the threads of the rods 40 engage corresponding internal threads in adjusting sleeves 42 which are j ournalled to yturn in holes or lbearings in the connecting plate 32, but are held against movement lengthwisecf these Yholes' or bearings. i For this purpose, each sleeve 42 has an externa-l thread near the inner end thereof,and has a rnut 43 rigidly secured and held against turningI on this threaded part, which may 'for that reason be Ymade tapering, as

clearly shown in F ig. 3. rl`he other end ofthe Y sleeve is enlarged, and in the construction shown, is provided with a sprocket wheel 44. Consequently, the sleeves 42 are free to turn in the connecting plates 32, but are held against lengthwise movement therein by the nut 43 and the enlarged end or sprocket wheel 44. It will be obvious that by turning the nuts or adjusting sleeves 42, the intermediate part of the roll will be moved toward or from the adjusting plate through the medium of the rods 40.

The construction described makes it necessary to adjust all of the adjusting sleeves 42 t0 the same extent, to prevent binding of the intermediateroll part on its shaft, and for this reason, all of the sprocket wheels 44 are connected by means of a sprocket chain 45 so that upon turning one of the adjusting sleeves 42, the same amount of turning motion will be transmitted to each of the other sleeves. This turning may be effected in any suitable manner, and for this purpose, each adjusting nut or sleeve may be provided beyond the sprocket wheel 44 with a head 46 which may be engaged by a wrench for turning the same.

By means of the construction described, it will be evident that when the parts are adjusted from the positions shown in Fig. 2 to thepositions shown in Fig. 4, it will be necessary first to turn the adjusting sleeves 42 of the outer rolls C and D to draw the intermediate members 22 completely into the recesses 21 of the outer roll part 20. When this has been done, the studs 31 of all three roll shafts may be turned to move the clamping plates 32 toward the ends of the roll shafts until the outer and intermediate parts have been moved into the positions shown in Fig. 4. To make the corresponding change in the inner roll, it is only necessary to turn the stud 31 to move the outer and intermediate roll parts 14 and 15 into close-fitting relation to the roll part 17. f

When it is desired to move the parts from the positions shown in Fig. 4, into the positions shown in Fig. 5, the studs of the two outer or lower rolls C and D are turned in the opposite direction to move the connecting plates 32 away from the ends of the roll shafts 11. When it is desired to adjust the parts Vof the inner or upper roll B to the position shown in Fig. 6, the stud 31 is iirst turned to move the connecting plate 32 away from the end of the roll shaft 10, and the adjusting sleeves 42 are then turned to move ythe intermediate roll part 15 away from the outer roll part 14.v Y

It will thus be seenthat by means of the adjusting means described, any desired adjustment ofthe intermediate and outer roll parts relatively to the inner roll part may be obtained. Consequently, when the parts are adjusted to the position shown in Fig. 2, a flat bar W may be passed through the rolls to bend the same edgewise into the desired curvature, the inner edge of the bar entering into a groove or recess formed between the intermediate and inner roll parts 15 and 17 of the inner roll B and the outer edge of the bar Vil entering between the roll parts 2O and 23 and bearing on the intermediate roll part 22, which in that case is arranged at the base of the slot or groove between the roll parts 2O and 23. l/Vhen it is desired to bend a substantially flat bar X flatwise, the various parts of the rolls are placed closely together, as shown in Fig. 4, so that the several roll parts cooperate to form rolls with substantially uninterrupted, smooth, cylindrical surfaces. When it is desired to roll an angle bar Y, Fig. 5, with one leg extending radially outwardly from the center of curvature and from the other or cylindrical leg, the parts of the roll B may be left in the position shown in Fig. 4 to form flat bearing surface for the cylindrical flange of the bar Y, and the parts 20.and 22 of the rolls C and D are moved outwardly to form a space between these parts and the inner roll parts 23 into which the outwardly extending leg of the angle bar may extend during the process of bending.

Vhen the machine is used for bending an angle bar Z with one of its legs extending inwardly toward the radius of curvature from the other leg, the arrangement illustrated in Fig. 6 is employed, in which the parts of the outer rolls C and D are secured closely together, as shown in Fig. 4, and the parts of the inner roll B are so spaced that the two parts 15 and 17 are close together and a gap is formed between the parts 14 d E5 into which the inwardly extending of the angle bar may extend` When the rolls are employed for bending` a bar in such a manner that there is a considerable difference between the radii of curvature of the inner face of the work engaging the roll B and the outer face of the work engaging the other two rolls, since all of the rolls are positively driven at the same peripheral speed, it will be obvious that a considerable amount of slipping will result. This slipping is very objectionable in that it sets up severe vibrations in the machine. In order to avoid this difficulty, means are provided for having the inner roll B act as an idler roll. For this purpose, in the construction shown, means are provided for readily disconnecting the three parts of the inner roll B from its shaft 10 and in this construction, there is also provided a bearing sleeve 50 between the shaft 10 and the several parts of the inner roll B. This sleeve is split to permit the key 27 to exten d through the same and into keyways in the shaft 10 and in the parts of the inner roll B. lVhen it is desired to rotate the inner roll B about its driving shaft, the key 27 may be removed llO and a half key 5l inserted, as shownin Figs.v l, 2 and 7 This key is arranged in the keyway in the roll shaft l0 and extendsinto the split part of the bearing sleeve 50 and holds the same against rotation relatively to the shaft l0. The key, however, does not extend into the keywaysin the parts of the inner roll B, and consequently, these parts of the roll can turn relatively to the shaft 10. Consequently, referring to Fig. 2, it will be seen that since the radius of curvature of the inner face of the bar l/V is considerably less than. the radius of the outer face of this bar engaging the rolls Cv and C, the roll B will turn at a slower rate of speed than the other two rolls, so that the parts ofthe roll B will turn relatively to the bearing sleeve 50. If desired, the half key may also be employed when rolling the flat bar X flatwise, providing the thickness of the bar is greatenough to warrant the use of an idle roll. When rolling angles, the bending pressure is exerted only on the flat faces of a leg arranged between the rolls so that the disconnection of the roll B from its driving shaft is not necessary, and also not desirable, since the additional driving force of the innervroll B is necessary to e'ect the bending of angle bars or similar shapes' In order to prevent the rotation of the roll aboutthe shaft from turning the stud 31, antifriction fiber washers or similar means 52 and 53 may be employed between the plate 32 and the flange 34 ofthe stud and the nut 36 respectively. The washers will not interfere with the locking of the stud in fixed position by the use of the lock nuts. Obviously, when the roll VB isdisconnected from its shaft, the nuts 36 and 37 are backed away from th-e plate 32 sufficient to permit this plate to turn relatively to the stud 31.

l The arrangement of the parts in such aV manner that the adjusting means for the in-V termediate roll part are mounted on the connesting .plate 32, forms a connection between the outer and intermediate roll parts,so that the'removal of the outer and intermediate Y roll parts from their shafts can be very readily eflected by merely turning the' studBl Vto entirely disen gage the same from the threaded hole 30, whereupon these roll' parts are removed as a unit. l

While the invention has been described as applied to rolls for bending flat barsA and angle bars, it will be obvious thatwith slight changes 1in the shape of the roll parts, the rolls can be adapted for bending work of other shapes. I claim as my invention: v Y Y l. A composite roll for a bending machine,

i said roll being'divided lengthwise ofthe aXis v thereof into agplurality o f roll parts, at least -i twoof said parts being adjustable lengthwise ofthe roll relatively to another part andto ing widths', at leastone of said roll part-s hav ing'width, at least one' of lsaid roll parts havj ing a portion of smaller diameterthan the rolldiameter and extending into an annular recess of-an adjacent roll and movable out of said recessto kform a bottomV for one of said y roll shaft and the other parts being adjustable lengthwise of said roll shaft relatively to said liXed-part and toeach other, said roll parts, when arranged closely togethenforming a roll with a single substantially unbroken cylindrical surface.

3. A roll for a bending machine, includ-- ing at least three annular parts mounted on a roll shaft, one of said parts beingffiXed to said roll shaft and the other parts being adj ustable lengthwise of said roll shaft relatively to said fixed part land to each other, and means forming a Y connection between said shaft andsaid adjustable parts forelfecting adjustmentthereof. v

l. A roll for a bendingfmachine, including at least three annular parts mounted on a roll shaft, one -of said parts beingfixed'to said roll shaft 'andthe other parts being adjustable lengthwise of said roll shaft relatively to said fixed-'part and to each other, and means mounted on said roll shaft and extending beyondA lthe end thereof .and connected with said ladjustable parts for adjusting-the same. f

5; Aroll ing a plurality of annular parts mounted on a. roll shaft, one of said parts being fixed to said rroll shaft and the otherparts being adj ustable lengthwise of said rolll shaftrelatively to said fiXedpart and to each other, a mem- 3l;

for a bending machine, includ- 'iii-:s

ber adjustablymounted on the end of said i shaft and connected with one of. said adjustablerollparts, and means mounted on said member and connected with the other adjustable rollpart to effect adjustment thereof relatively to the other parts of said roll;k Y

6. Aroll for a bending machine, including a plurality of annular parts arranged successively lengthwise of a roll shaft, some of said roll parts being adjustable lengthwise of the roll shaft to enablefthe roll parts to be moved together toform a substantially continuous cylindrical surface and to be separated to form Yannular grooves of varying widths to receive portions ofthe work which 11i-i is being (bent, at least oneof said roll parts havinga portionyof smaller diameter than the roll diameter to form a bottom for at least one of-said'gr'ooves.- 1 Y 7. A roll for a bendingjmachine, including a' plurality of annular parts arranged successively lengthwise of-a roll shaft, an adj ustable connection between the outermost of said roll'parts and Y.the vrr'ill'shaft for adjusting said outermost part relatively to the other roll parts, and means mounted on said outermost roll part and connected with another roll part for adjusting said other roll part.

8. A roll for a bending machine, including a plurality of annular parts arranged successively lengthwise of a roll shaft, the innermost of said roll parts being mounted in fixed relation to the roll shaft, means connecting the end of the roll shaft and the outermost roll part for adjusting the outermost roll part lengthwise of the shaft, and means movable with said outermost part and connected to an intermediate part for adjusting` said intermediate part relatively to said outermcst part and said inner part.

9. A roll for a bending machine, including a plurality of annular parts arranged successively lengthwise of roll shaft, a threaded stud engaging the end of the roll shaft and connected with the outermost of said roll parts for adjusting the same lengthwise of said shaft, and means mounted on said outermost roll part for effectinfr adjust-ment of an intermediate roll part.

10. A roll for a bending machine, including a plurality of annular parts arranged successively lengthwise of a roll shaft, a mem- -her secured to the outermost of said roll parts and extending crosswise of the end of the sha-ft, adjusting means connecting the end of the shaft and said member for eecting adjustment of said outermost roll part lengthwise of the shaft, means for adjusting an intermediate roll part lengthwise of said shaft, including rods connected with said intermediate roll part and extending through said outermost roll part, and means located at the outer end of said outermost roll part for effecting adjust-mentof said intermediate roll part through the medium of said rods.

11. A roll for a bending machine, including a plurality of annular parts arranged successively lengthwise of a roll shaft, means connecting the outermost roll part and said shaft -for adjusting said outermost roll part lengthwise of said shaft, rods secured to an intermediate roll part and extending lengthwise through said outermost roll part, means located at the outer end of said outermost roll part for effecting adjustment of said intermediate roll part Ythrough said rods, and

means connecting said adjusting means to effect a simultaneous adjustment of all of said adjusting means acting on said rods.

12. A roll for a bending machine, including a plurality of annular parts arranged successively lengthwise of a roll shaft, a member secured to the outermost of said roll part-s and extending crosswise of the end of the shaft, adjusting means connecting the end of the shaft and' said member for effecting adjustment of said outermost roll part lengthwise of the shaft, rods secured to an intermediate roll part and extending through said outer rollpart and threaded near their outer ends, internally threaded sleeves engaging said threaded part and held against endwise movement relatively to said outermost roll part, sprocket wheels on said sleeves, and a sprocket chain connecting said sprocket wheels, whereby adjustment of one of said sleeves to adjust said intermediate part results in simultaneous adjusting of all of said sleeves.

13. A bending machine having three rolls, two of which are arranged to bear against the portion of the work of greater radius of curvature and the third of which hears against the portion of the work of lesser radius of curvature, driven shafts on which said rolls are mounted, means for locking said rolls to their shafts to turn therewith, and a bearing bushing arranged between said third roll and its shaft and about which said roll may turn when unlocked from its shaft.

14:. A bending machine having three rolls, two of which are arranged to bear against the portion of the work of greater radius of curvature and the third of which bears against the portion of the Work of lesser radius of curvature, driven shafts on which said rolls are mounted, keys for securing said rolls to said shafts and fitting into keyways in said shafts and rolls, and a bearing bushing arranged between said third roll and its shaft and slit to permit passage of a key therethrough, said third roll rotating about said bushing when the key connect-ing the same with its shaft is withdrawn.

15. A bending machine having three rolls, two of which are arranged to bear against the portion of the work of greater radius of curvature and the third of which bears against the portion of the work of lesser radius of curvature, driven shafts on which said rolls are mounted, keys for securing said rolls to said shafts and fitting into keyways in said shafts and rolls, a bearing bushing arranged between said third roll and its shaft and slitto permit passage of a key therethrough, said third roll rotating about said bushing when the key connecting the same with its shaft is withdrawn, and means for securing said bushing against turning about its shaft when said kev is withdrawn.

16. A bending machine having three rolls, two of which are arranged to bear against the portion of the work of greater radius of curvature and the third of which bears against the portion of the work of lesser radius of curvature, driven shafts on which said rolls are mounted., kevs for securing said rolls to said shafts and fitting into keyways in said shafts and rolls` a bearing bushing arrangedl between said third roll and its shaft and slit to permit passage of a key therethrough, said third roll rotating about said bushing when the key connecting the same :v'nhg'tsV shaft sV Withdrawn, and ahalf key, -extendng only ntowthe keyway of the shaft of. said ,third Y1011 andlnto said sltn said bushing, to hold said bushing against turn- 35 ng'about its shaft While saidthird roll re- .volves about said'bushillg. f y a ARTHUR T. AYATES.

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