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Publication numberUS2087721 A
Publication typeGrant
Publication date20 Jul 1937
Filing date13 May 1935
Priority date13 May 1935
Publication numberUS 2087721 A, US 2087721A, US-A-2087721, US2087721 A, US2087721A
InventorsKellogg Homer G
Original AssigneeMotor Products Corp
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Metalworking machine
US 2087721 A
Abstract  available in
Images(3)
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Claims  available in
Description  (OCR text may contain errors)

\ July 20, 1937. H. G. KELLOGG METALWORKING MACHINE Filed May 13, 1935 5 Sheets-Sheet lv INVENTOR HOMER G.KELLOGG ATTORNEYS BY f JulyZO, 1937. H. G. KELLOGG 2,087,721

- METALWORKING MACI' IINE Filed May 13, 1935 s Sheets-Sheet 5 F-IG.7.

INVENTOR HOMER G. K BY ELLOGG ATTORNEYS Patented July 20, 1937 T FFIQE METALWORKING MACHINE Application May 13, 1935, Serial No. 21,289

12 Claims.

This invention relates generally to rolling machines and refers more particularly to apparatus for forming strip stock into an arcuate section of predetermined cross sectional contour.

One of the principal objects of this invention resides in the provision of apparatus having means for bending a strip of stock to a predetermined arcuate configuration, and having means to prevent buckling of the strip during the bending operation.

Another advantageous feature of this invention resides in the provision of a rolling machine having means for bending a strip of stock to a predetermined arcuate configuration subsequent to rolling the strip to the desired cross sectional contour, and having means for exerting a lateral pressure upon a portion of the strip during the bending operation to prevent buckling of this portion.

An additional object of the present invention consists in the provision of a rolling machine having a fixture at the delivery end thereof periodically operable to bend the strip to a predetermined arcuate configuration, and having means cooperating with certain of the forming rolls, during the bending operation of the fixture, to exert a lateral pressure upon the portion of the strip therebetween.

A further advantageous feature of the present invention resides in the novel means provided for actuating the bending fixture and pressure applying means in timed relation to each other. The aforesaid means, as well as the above objects and other advantageous features of the present invention, will be made more apparent as this description proceeds, especially when considered in connection with the accompanying drawings, wherein:

Figure 1 is a semi-diagrammatic side elevational view of a portion of a rolling machine equipped with the present invention;

Figure 2 is a fragmentary perspective view of a portion of the machine shown in Figure 1;

Figure 3 is a sectional view taken substantially on the plane indicated by the line 33 of Figure 1;

Figures 4, 5, and 6 are respectively cross sectional views taken substantially on the lines 44, 55 and 6 -5 of Figure 3;

Figure '7 is a detailed perspective View of a part of the lateral pressure applying means;

Figure 8 is a similar view of a cooperating part of the aforesaid means; and

Figure 9 is a cross-sectional view through a molding strip, illustrating one type of construetion capable of being formed by the present machine.

Referring now more in detail to the drawings;

ing rolls H cooperating with each other to form' a strip of flat stock to a predeterminedlcrosssectional contour. For the purpose of illustration, the rolls 5 I may be considered to posses the configuration required to form the strip to the cross-sectional contour illustrated in Figure 9, although it is to be understood that this contour may vary materially without departing from the spirit and scope of this invention.

.In detail, the strip is designated generally in Figure 9, by the reference character l2 and comprises a transversely curved wall is provided at one edge with a return-bent portion I 4 terminating in an inwardly extending 'flange' I5; The opposite longitudinal edge of the strip is provided with a flange 56 extending in the same direction from the wall l3 as the return-bent portion It and terminating in a flange I! projecting toward the flange 55 previously set forth.

The strip i2 is formed in the rolling machine it with the return-bent portion M extending downwardly from the Wall l3 and provision is made, beyond the delivery end of the machine, in the form of a fixture It for bending the strip upwardly about the periphery of a forming roll it constituting the top roll of the end set of forming rolls II. As shown particularly in Figure 2, the forming roll l9 has a portion 20 corresponding in transverse contour to the cross sectional contour of the top wall 13 of the strip, and is provided with another portion 2| engageable with the periphery of a flange 22 extending radially outwardly from the cooperating forming roll 23. Upon reference to Figure 3, it will be noted that the front face 24 of the radial flange 22 forms a continuation of the portion 2!) of the forming roll it and conforms in shape to the contour of the downwardly extending return-bent portion it of the strip.

It will also be observed from Figure 3, that the forming roll 23 is secured to a drive shaft 25, while the cooperating forming roll I9 is secured to a shaft 26 driven from the shaft 25,

through the medium of suitable gearing 2T. The axis of rotation of the forming roll I9 is substantially parallel to the axis of rotation of the cooperating forming roll 23, and both of these axes are arranged in a common vertical plane.

Upon referring again to Figure 3, it will be noted that the forming roll 23 forms the second roll of the end set H and that this roll not only cooperates with the roll IS in the manner previously stated, but also cooperates with a third forming roll designated generally by the reference character 28. The forming roll 28 is secured to a shaft 29 journaled for rotation about an axis extending perpendicular to the axis of the rolls l9 and 23, but located in a common plane with the latter axes. In detail, the upper end of the shaft 29 is journaled in a block 29 slidably supported in a wear plate 30 for shifting movement in the direction of the axes of rotation of the aforesaid forming rolls, and-the lower end of the shaft 29 is journaled in a collar 3| mounted for axial sliding movement upon the drive shaft 25 at the front side of the forming roll 23. Thus it will be seen that the forming roll 28 is mounted for rotation at the front side of the forming roll 23 and, in the present instance, is provided with a peripheral portion 32 cooperating with the surface 24 of the roll 23 to receive the return-bent portion [4 of the strip therebetween.

Referring again to Figure 3, it will be noted that the forming roll 28 is driven from the forming roll 23, notwithstanding the fact that the fomer is shiftable relative to the latter. In detail, the front side of the forming roll 23 is fashioned to form, in effect, a-beveled gear 33 adapted to mesh with a correspondingly beveled gear 34 formed on the forming roll 28. The cooperating teeth of the two beveled gear portions are fashioned to provide a limited displacement of the roll 28 relative to the roll 23 without destroying the driving connection therebetween.

It has previously been stated that as the strip is delivered from between the end set of forming rolls H, the same is periodically bent upwardly about the portion Zn-of the roll l9, by means of the fixture Is. In the present instance, the fixture I8 comprises an arm 35 having the end 36 journaled on the drive shaft 25 at the rear side of the forming roll 23 and having a follower 31 at the free end thereof engaging a cam 38. The cam 38 is secured to a shaft 39 driven through the medium of reduction gearing 40 from the drive shaft 25, and is provided with a cam surface 4| of a contour varying in dependence upon the degree of curvature desired and the number of bends to be formed in the strip. The actual bending of the strip'is effected by means of a plate 42 secured to the arm 35 intermediate the ends and grooved as at 43 to provide clearance for the return-bent portion I 4 of the strip, with the result that the actual bending pressure is exerted upon the flanges I6 and ll of the strip.

With the foregoing arrangement, it will be apparent that the strip is bent upwardly about the portion 20 of the roll l9 upon actuation of the fixture l8 bythe cam 38, and it will also be observed that during the bending operation the return-bent portion'l4 stretches to some extent. This stretching of the return-bent portion l4 of the strip has a tendency to deform the same, and in order to prevent deformation, pressure is applied to the return bent portion during the bending operation. In general, the above is accomplished by moving the roll 28 in a direction toward the cooperating roll 23, during the bending operation, to effectively grip the return-bent portion l4 of the strip between the surfaces 24 and 32 of the rolls. In detail, the roll 28 is positively shifted toward the roll 23, by means of an arm 44, having. an integral collar 45 at one end journaled upon the drive shaft 25 at the front side of the collar 3i and having a cam face 46 cooperating with a cam face 47 on the collar 3| to move the latter toward the roll 23 when the free end of the arm 44 is moved upwardly. Inasmuch as the forming roll 28 is mounted on the collar 3!, it necessarily follows that the portion 28 of this roll will be moved toward the surface 24 of the roll 23 when the, collar 31 is urged axially of the shaft 25 toward the roll 23 by the arm 44.

The required upward displacement of the arm 44 to effect the foregoing results is accomplished by means of a cam 49 secured to the shaft 39 adjacent the cam 38 and having a cam surface 5i] predetermined in dependence upon the configuration of the cam surface 4!, so as to apply the desired pressure to the return-bent portion M of the strip through the forming roll 28, during the operation of the fixture 58 by the cam 38 to bend the strip. This arrangement insures maintaining the desired contour of the returnbent portion i4 during the bending operation and, in this connection, it may be pointed out that the shape of the remaining portion of the strip is maintained during the bending operation, by means of an articulated shoe 5! engageable within the strip in the manner shown in Figure 4.

Referring now, generally, to the operation of the bending fixture l8 and pressure applying means, it will be noted that as the follower on the free end of the arm 35 rides upon the cam surface 4| of. the cam. 38, the plate 42 engages the inwardly directed flanges on the strip and bends the latter about the peripheral portion 20 of the forming roll I9 to a curvature depending upon the configuration of the cam surface 4!.

At substantially the same time, the free end of the arm 44 is moved upwardly by the cam surface 53 on the cam 49 and this upward movement of the free end of the arm 44 causes the collar 45 to rock about the shaft 25 in a direction to urge the collar 3i toward the forming roll 23 through the medium of the cooperating engaging cam faces 43 and 41. Inasmuch as the forming roll 28 is carried by the collar 3|, it necessarily follows that the portion 32 of the forming roll 28 is urged toward the surface 24 of the forming roll 23 to clamp the return-bent portion of the strip therebetween. It being understood that sufficient play is provided between the cooperating engaging beveled teeth 33 and 34 to provide for the required relative movement of the two aforesaid rolls. It will also be understood that the cam surface is designed to maintain the pressure on the return-bent portion M of the strip throughout the entire bending operation.

Thus from the foregoing, it will be observed that I have provided relatively simple means for bending strips of irregular cross sectional contour Without deforming or otherwise interfering with the desired shape of the strip. It will also be apparent that the means for accomplishing the above results operates automatically and is not restricted to any one particular shape of strip.

What I claim as myinvention is: V

1. In a machine for bending a strip of. stock having abody portion and having a portion extending at an angle to the body portion, means for advancing the stock in the direction of its length along a predetermined path of travel, a fixture mounted for oscillation about an axis extending transversely. tothe. pathof travel and engageable with the stock to bend the latter, and cooperating means on opposite sides of the angularly extending portion of the stock for gripping the angularly extending portion of the stock therebetween during the operation of the fixture to bend the stock.

2. In a machine for bending a strip of stock having a body portion and having a portion extending at an angle to the body portion, means for advancing the stock in the direction of its length along a predetermined path of travel, a fixture mounted for oscillation about an axis extending transversely tolthe path of travel and engageable with the stock to bend the latter, means for periodically moving the fixture into engagement with the stock, and means efiective during the intervals the fixture is moved into engagement with the stock to exert a clamping pressure on opposite sides of the angularly extending portion of the strip in the region the latter is bent.

3. In a machine for bending a strip of stock having a body portion and having a portion extending at an angle to the body portion, means for advancing the stock in the direction of its length along a predetermined path of travel, a fixture mounted for oscillation about an axis extending transversely to the path of travel and engageable with the stock to bend the latter, cam means for periodically moving the fixture into engagement with the strip, and cam means operating during the interval of operation of the aforesaid cam means to move the fixture into engagement with the strip to exert a lateral pressure upon the angularly extending portion of the strip.

4:. In a machine for bending a strip of stock having a body portion and having a portion extending at an angle to the body portion, a revoluble roll having a portion engaging one side of the angularly extending portion of the strip, a cooperating revoluble roll having a portion engaging the opposite side of. the angularly extending portion, means engageable with the strip as it passes from between the rolls to bend the strip to the desired arcuate contour, and means for relatively moving the rolls toward each other during the bending operation to grip the angularly extending portion therebetween.

5. In a machine for bending a strip of stock having a body portion and having a portion extending at an angle to the body portion, a driven roll having a portion engageable with one side of the angularly extending portion of the strip, a second roll mounted for rotation about an axis extending at substantially right angles to the axis of the driven roll and having a portion engageable with the opposite side of the angularly extending portion, means positioned beyond the rolls for engaging the strip to bend the same to the desired arcuate contour, and means for relatively moving the rolls toward each other during the bending operation to clamp the angularly extending portion therebetween.

6. In a machine for bending a strip of stock having a body portion and having a portion exopposite side of the angularly extending portion,

the strip to bend the same to the desired arcuate contour, and means for relatively moving the rolls toward each other during the bending operation to clamp the angularly extending portion therebetween.

'7. In a machine for bending a strip of stock having a body portion and having a portion extending at an angle to the body portion, a revoluble roll having a portion engaging one side of the angularly extending portion of the strip, a cooperating revoluble roll having a portion engaging the opposite side of the angularly extending portion, a third roll engageable-with the body of the strip, means located beyond the rolls and movable into engagement with the strip to bend the latter about the third roll, and means for relatively moving the first and second rolls toward each other during the bending operation to grip the angularly extending portion of the strip therebetween.

8. In a machine for bending a strip of stock having a body portion and having a portion extending at an angle to the body portion, a revoluble roll having a portion engaging one side of the angularly extending portion of the strip, a cooperating revoluble roll having a portion engaging the opposite side of the angularly extending portion. a third revoluble roll engageable with the body of the strip and with the periphery of the first roll, a fixture mounted for oscillation about an axis parallel to the axis of the first roll and engageable with the strip beyond the rolls to bend the stock about the thirdroll, means for periodically moving the fixture into engagement with the" strip, and means for relatively moving the first and second rolls toward each other during the bending operation to grip the angularly extending portion of the strip therebetween.

9. In a machine for bending a strip of stock having a body portion and having a portion extending at an angle to the body portion, means for advancing the stock in the direction of its length along a predetermined path of travel including a revoluble roll having a portion engageable with oneside of the angularly extending portion of the strip, a second rolldriven by the first roll for rotation in a plane perpendicular to the plane of rotation of the first roll and having a portion engageable with the opposite side of the angularly, extending portion, a third roll rotatable about an axis parallel to the aXis of the first roll and disposed in the plane of the latter axis, said third roll having a portion engageable with the body of the strip, a fixture mounted for oscillation about the axis of the first roll and engageable with the strip to bend the stock about the third roll, cam means for periodically oscillating the fixture, and means for relatively moving the first and second rolls toward each other during the bending operation to grip the angularly extending portion of the strip therebetween.

10. In a machine forbending a strip of stock having a body portion and having a portion extending at an angle to the body portion, means for advancing thestock along a predetermined path of travel, means for periodically exerting a lateral pressure upon the angularly extending portion of the strip of stock as it is advanced along said path of travel, and means operating during the interval of operation of the aforesaid means to bend the strip of stock toa predetermined arcuate contour.

11. In a machine for bending a strip of stock having a body portion and having a portion extending at an angle to the body portion, means for advancing the stock along a predetermined path of travel, means engageable with the strip of stock as it is advanced along said path of travel to bend the strip to a predetermined contour, members positioned upon opposite sides of the angularly extending portion of the strip of stock in the region at which bending of the strip occurs, and means for relatively moving the members toward each other in timed relation to the operation of the bending means to grip the angularly extending portion therebetween.

12. In a machine for bending a strip of stock having a body portion and having a portion extending at an angle to the body portion, means for advancing the stock along a predetermined path of travel, means positioned upon opposite sides of the angularly extending portion of the stock and cooperating to exert a clamping pressure against the angularly extending portion as the stock is advanced along said path of travel, and means operating during the interval of operation of the aforesaid means to bend the strip of stock out of said path of travel.

' HOMER G. KELLOGG.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3023800 *7 Jan 19596 Mar 1962Greenway IndMetal bending machine
US5243844 *2 Sep 199214 Sep 1993Peter LisecProcess for producing curved sections in hollow profile strips
Classifications
U.S. Classification72/168, 72/172, 72/171
International ClassificationB21D5/06, B21D5/08
Cooperative ClassificationB21D5/08
European ClassificationB21D5/08