US2190429A - Rolling machine - Google Patents

Description

H. G. KELLOGG ROLLING MACHINE Filed May 11, 1937 3 Sheets-Sheet 1 R Y O E T O! N N .R E O V m 7 W m A Tigl.

Feb. 13, 1940. KELLQGG 2,190,429

ROLLING MACHINE Filed May 11, 1937 3 SheetSShet 2 I INVENTOR. v HOmer G.} e,lloqq fig. Q f M (Z i M ATTORNEYS Feb. 1940- H. s. KELLOGG 2 9 ROLLING MACHINE Filed May 11, 1937- 3 Sheets-Sheet 3 IN VENTOR.

BY Homer 6- Kel/oqq j-ATTORNEKSV p the rolling unit to receive Patented Feb. 13, 1940 UNITED STATES I i I non z igzmaai" i A Q I Homer G. Kellogg,

Detroit, Mich.. ammo to r. Motor Products Corporation, Detroit,"Mich., a corporation of, New York. r

Application May 11, 1937", sen-mine. 14am This invention relates generally to rolling'machines and refers more particularly to apparatus arcuate secing means for receiving the stock as His delivered from between the cooperating forming rolls and for bending the stock in a plane substantially parallel to the stock by the forming rolls.

Another advantageous feature of thepresent invention resides in the provision of means pre-. determinedly positioned with respect to the bending mechanism-to receive the bent strip and to control the degree of curvature of the strip.

The foregoing, as well as other objects, will be made more apparent as this description proceeds, especially when considered in connection with the accompanying drawings, wherein: I

Figure 1 is a semi-dialrammatic side elevajtional view of a rolling machine embodying my improved bending fixture; V

Figure 2 is a perspective view of the bending fixture;

Figure 3 is a plan view, partly in section, of the bending fixture shown in Figure 2; I

Figures 4, 5, and 6 are sectional views taken respectively on the planes indicated by the lines 4-4, 5-5, and 8-6 of Figure 3;

Figure 7 is a fragmentary perspective view of one of the guide members; 7

Figure 8 is a similar view of a guide member; and

Figure 9 is a fragmentary perspective view of the completed strip. g 4

The coiled strip produced by the machine forming the cooperating or curved longitudinally thereof, although the machine is by no means limited to the manufacture of this product. "In general, the machine comprises a rolling uniti l0 and a bending unit I i situated at the delivery end of the strip as it is disfrom the latter. The rolling unit comprises a plurality of sets of forming rolls I2 00- operating with each other to progressively fash-' ion the strip i3 to the desired cross sectional contour shown in Figure 9 of the drawings. The lower rolls of each set are driven in a counterclockwise direction from a driving gear i4 located between the units and the upper rolls are yieldably urged toward the lower rolls to fricthe plane of advancement of.

Journalled -in bearing blocksmins. (01.153-64) I 'tionallyclamp the'strip' between therolls. As

a result, the cooperatingirolls of each set serve to advance thestrip through the machine as well as to. form the sectional contour. it will be noted that. t estrip fashioned rolling unit comprises a portion ll andl'a depending return bent flange I at one longitudinal edge of the. body portion. The body portion is of substantial width as compared 10 to the. flange i6 and is inclined upwardly from the flanges- As the strip l3 leaves thelast set of forming rolls II, it is introduced tothe bending unit ii and'is coiled by thlsunitwithout disturbing the 15 cross sectional contour thereof. The bending unit ii is shown in Figure 4 as having a top roll secured to ashaft llhavingthe opposite ends 20 and having a gear 2i at oneend meshing with the drive gear 20 it for rotation by the latte'rin'a clockwise direction, or inthe direction of advancement ofthe strip through the machine. I from Figure '4. that the bearing blocks 20 are vertically slidably supported between upright 25 guides 12 to permit movement ofthe top roll i3 toward and away from the bottom roll 33.- The roll 23 is secured-to a vertical shaftll having the'opposite ends thereof suitablyjournalled in bearings 25 and having its axis of rotation ly- 30 ing in a common plane with the axis of rotation of the roll l3: Uponreference to Figure 4, it will be noted that the roll "has a peripheral surface '26 cooperating with the peripheral surface 31 of the roll l3 to receive the body portion l5 of the strip I 3 therebetween and "the clearance between the two peripheral surfaces is varied to a limited extent by adjusting screws 23 acting on the top surfaces of the bearing blocks to urge the same in a downward direction against 40 the action of springs 28 fixedly supported beneath Y the blocks in engagement with the bottom surfaces thereof.

' The roll Ills rotated in the direction of advancement 'of the strip by means of a beveled 5 gear 30 secured to the shaft 24 and meshing with a beveled gear 3i secured to a third shaft 32 which in turn is driven by a gear 33' the other two shafts and a: third roll 34 is securedto this shaft in cooperation with the rolls i3 and 23. The periphery of the roll 34 is provided with a radially extending annular portion 33 cooperating with an axially extending annul3 in its proper relation ing rolls l8 and 23, engaging the metal of the strip lar portion '36 on the periphery of the roll 28 to maintain the return bent flange It on the strip to thebody portion I! of the strip during the bending operation.

The strip I3 is coiled or bent about the axis of the roll 23 by reason of the fact that the peripheral speed of the portions of the cooperatthe lower edge portion of strip l3, is greater than the peripheral speed of the portions of these rolls which engage opposite sides of the strip at the upper longitudinal edge thereof. In other words, the portions of the rolls engageable with opposite sides of the strip I3 at the lower edge thereof are spaced a greater respective rolls than the portions of the latter engaging the upper edge of the strip. As a result, is progressively drawn to a greater extent from the upper edge of the strip to the bottom edge of the latter in a direction longitudinally of the strip, and this working of the metal causes the strip degree of curvature about the axis of the horizontal roll 23. In order to insure or assist in bending the strip as it passes between the rolls l8 and 23, the screw 28 adjacent the roll l8 may be adjusted to move the associated bearing block 20 in a direction toward the roll 23 relative to the bearing block 20 at the opposite end of the roll shaft l9. In other words, the axis of the shaft [9 is tilted slightly in a direction to cause the portions of the rolls having the greatest peripheral speed to exert more pressure on the strip than the other portions of the rollsrand, as a consequence, bending of the strip, to the proper degree of curvature is facilitated. It will, of course, be understood that suificient' clearance exists between the registering peripheral portions of the rolls l8 and 34, and between the inter-. meshing gears 2| and 33 to permit the limited adjustment referred to above. This differential pressure may also be employed to control the degree of curvature since by reversing the above procedure, or in other words applying more pressure on the strip at the edge opposite the flange N, the degree of curvature about the axis of the roll 23 may be reduced.

In many classes of work, it is highly important that the degree of curvature be very accurately controlled and this is accomplished herein by providing a guide 40 adjacent the bending unit II to receive the coiled strip as it is discharged from between the rolls l8 and 23. The guide 40 comprises cooperating relatively adjustable members 4| and 42 shown in Figure 6 as cooperating with each other in forming a passage 44 corresponding incross section to the cross sectional contour of the strip l3 and curved longitudinally of the strip to correspond to the predetermined degree of curvature desired. In detail, the member 42 is pivoted, as at 45, to the frame of the machine for swinging movement in a plane parallel'to the plane of rotation of the roll 23 and is provided with a top surface 46 over which the strip I3 is adapted to pass. The surface 46 conforms in cross section to the cross sectional contour of the portion 15 of the strip and is curved. in the path of travel of the strip to the proper radius. The guide member 4| is also supported on the machine frame for pivotal adjustment in a plane parallel to the plane of pivotal movement of the member 42 and the swinging end of the member 4|. is formed with a recess 41 therein receiving the lower edge portion of the member 42 in the manner shown in distance from the axes of the,

to assume a constant Figure 6. figure that the the top wall of the strip top wall of the recess engages l3 and that both mem- It will be observed from this latter bers are adjusted to frictionally clamp the por- 2 the member 4| byan adjusting screw 49. With this additional adjustment, frictional engagement of the members with the strip isinsured,

irrespective of the pivotal adjustment of the Referring again to Figure 6 of the drawings, it will be noted that the depending return bentilange IE on the strip .l3 is also frictionally engaged by cooperating arcuate surfaces- 50 and 5| on the members 4| and 42, respectively, in order to prevent deforming of this flange by the bending operation. It will,

members.

produced by the machine is cut to the desired lengths, but the means for accomplishing this result forms no part of this invention andis accordingly not shown herein. 3

From the foregoing, it will be observed that I have provided relatively simple mechanism for a predetermined degree of course, be understood that the coiled. strip v bending this strip in a plane substantially parallel to the plane of advancement of the strip through the machine without interfering withv the contour of the strip. In addition, attention is called to the fact that the bending. operation is effected by cooperating driven rolls in such a manner that these rolls cooperate to actually advance the continuous strip at the same time it is being bent to the proper degree of curvature. 7

What I claim as my 1. In a metal working machine, a bending unit having cooperating revoluble rolls provided with bearing surfaces 'both inclined with respect' to the axes of the rolls and arranged so that the corresponding oppositely disposed port ons of the bearing surfaces have means for introducing a stripbetwe'en the inclined surfaces of the rolls, means for rotating the rolls to effect a invention is:

about axes extending at an angle to each other and having cooperating surfaces both inclined with respect to the axes whereby the corresponding outer portions of the surfaces have'a periph-l- I r eral speed greater than the corresponding inner, for introducing portions of said surfaces, means 7 a strip of metal between said surfaces, and means for relatively adjusting the rollsto exert a differential pressure on portions of, the strip spaced 1 transversely thereof. v 3. In a metal working machine. a bending unit having cooperating rolls supported for rotation" at anangle to eachother;

having cooperating surfaces both inclined with respect. to the axes about axes extending in a common plane and bending of the strip in ac L V cordance with the difference in peripheral speed 1 means for introducing a strip of metal between said surfaces, and means for relatively adjusting the rolls to apply a greater pressure on the strip adjacent the outer longitudinal edge portion of the strip.

4. In a metal working machine, means for bending a strip of stock having'a transversely inclined body portion and having a flange extending at an angle from one logitudinal edge of the body portion, said means including cooperating rolls supported for rotation about axes extending at an angle to each other and having cooperating surfaces both inclined with respect to the axes at an angle corresponding to the angle of inclination of the body portion of the strip, means for introducing the body portion of the 'strip between the inclined surfaces of the rolls,

means for rotating the rolls to effect a bending of the strip in accordance with the difference in .engageable with opposite sides of the flange on the strip to maintain the, latter in its predetermined angular relationship to the body portion of the strip during the bending operation;

5. In a metal working machine, a bending unit having cooperating revoluble' rolls provided, with.

bearing surfaces both inclined with respect to the axes of the rolls and supported with the bearing surfaces adjacent each other to receive a strip of stock therebetween, and means for relatively adjusting the rolls to exert a differential pressure on different portions of the strip of stock as the latter passes between the bearing surfaces on the rolls.

6.In -a metal working machine, a bending.

unit having cooperating bending rolls provided with bearing surfaces both inclined with respect to the axes of the rolls and arranged so that the corresponding disposed portions of the bearing surfaces of the rolls have the same peripheral speed, means for introducingya strip of stock between the inclined surfaces of the rolls, means for relatively adjusting the rolls to exert a differential pressure on different portions of the strip of stock as it passes between the bearing surfaces to longitudinally bend said strip, and guide means predeterminedly positioned with respect to the cooperating rolls to engage the strip as it passes from between the bearing surfaces of said rolls and adjustable to control the degree of

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