US1262882A - Forming and rolling machine. - Google Patents

Description

A. L. WARNER. FORMING AND ROLLING MACHINE.

APPLICATION FILED DEC. 19, I916- Patented Apr. 16, 1918.

4 SHEETS-SHEET I.

A. L. WARNER.

FORMING AND ROLLING MACHINE.

APPLICATION FILED 020.19. I916.

1,262,882. Patented Apr. 16, 1918.

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23 &0 31 .36 35 .3715 l A. L.- WARNER.

FORMING AND ROLLING-MACHINE.

APPLICATION FILED DEC. 19. ms.

1,262,882 .Patented'Apr. 16, 1918. 3 4 SHEETS-SHEET 3. 7

A. L. WARNER.

FORMING AND ROLLING MACHINE.

APPLICATION men ozc. I9. 1916.

1,262,882. Patented Apr. 16, 1918.

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ARTHUR L. WARNER, OF IVIOLINE, ILLINOIS, ASSIGNOR TO WILLIAMS, WHITE & COIVI- IPANY, OF MOLINE, ILLINOIS, A CORPORATIONOF ILLINOIS.

FORMING AND ROLLING MACHINE.

Specification of Letters Patent.

Application filed December 19. 1916. Serial No. 137,868.

To all whom it may concern:

Be it known that I, ARTHUR L. WARNER, a citizen of the United States, residing at Moline, in the county of Rock Island and State of Illinois, have invented certain new and useful Improvements in Forming and Rolling Machines, of which the following is a specification.

-My invention relates to machines for forming and rolling bars into substantially round or oval rings, or other similar closed structures.

One of the objects of my invention is to provide a ring forming machine for rolling bars into circular structures, such as rings, ovals, or the like, which will, in a large measure, avoid reduction in area of cross section, due to stretching of the bars, or stock of which the ring is formed; which will produce symmetrically-curved structures, throughout, without leaving the terminal ends of the stock substantially straight, and which will accurately and speedily produce such structures.

Another object of my invention is to provide means for yieldingly compensating for increased thickness of the produced structure, vertically or laterally, due to its overlapped ends, when such ends become necessary.

And still another and more specific object of my invention is to provide improved means for securely holding the leading end of the bar in intimate association with the form, or die about which the bar is to be wrapped.

Other and further objects of my invention will become readily apparent, to persons skilled in the art, from a consideration of the following description when taken in conjunction with the drawings, wherein Figure 1 is a plan view of my improved machine. I V

Fig. 2 is a central vertical section, taken on line 2-2 of Fig. 1.

Fig. 3 is a transverse section taken on line 3-3 of Fig. 2, looking in the direction of the arrows.

Fig. 4. is a section taken on line llof Fig. 2, looking down.

Fig. 5 is a fragmentary side elevation, parts being broken away, of a modified head arrangement permitting quick release of the rollers.

Fig. 6 is a plan view of the roll showing an angle-bar being wound about the ring die. Fig. 7 is a section through the rolls showlng an angle-bar clamped to the die.

Fig. 8 is an isometric perspective View of a ring, rolled from a bar having a rectangular cross section, as it will appear when completed.

Fig. 9 is a similar view of a ring rolled from an angle-bar, with its ends overlapped, to be welded.

Fig. 10 is a rectangular bar cut to length and scarfed at its ends, comprising the dimension stock from which the ring is to be made.

In all the views the same reference characters are employed to indicate similar parts.

In the common practice of rolling straight stock, or bars into circular, elliptical or oval structures or the like, there has usually, heretofore, been some stretching and consequent decrease in cross-sectional area of that part of the stock, or bar, farthest removed from the axis about which the bar is being wrapped and some consequent upsetting, or increment in the cross sectional area, in that part of the stock nearest said axis, and furthermore, that portion or end of the stock, which is last to receive bending treatment has been usually, left straight, or curved on a longer radius than the remaining portion of the stock- These defects are largely due to the fact that the stock has not been supported at every point on its inner, annular surface, during the curving operation, so that it could berolled to a fixed form, while stress is being applied to curve it.

To overcome these defects in the finished product, I provide a die or form, of substantially the inner dimensions of the ring to be formed; secure the leading end of the bar directly to the form or die and rotate the die to bend the bar around it, and while this operation is being performed I press the bar, while hot, into intimate contact with the revolving die, with an auxiliary roll, and

Patented Apr. is, 1918.

thereby roll the metal around the revolving cause the bar to reassume and maintain its original straight shape. when the bending stress is withdrawn. I, therefore, relieve the bar of this stress and cause it to remain in the shape, when cool, into which it has been rolled.

In the exemplilication of my invention, of which the accompanying drawings illustrate an actual embodiment, a base 12, provided with a forwardly extending part 13, is mounted upon a sub-base 14-, and a pedestal 15, respectively. The base 12 is provided with outwardly extendingly parallel flanges 1616 secured to the rectangular box-like base, as by bolts 1717. The base 12 may be provided with a vertically QX tending abutment 18, as shown in Fig. 2, or it may be extended rearwardly and provided with a toggle-joint system 19, as shown as a modification in Fig. the use and purpose of which will be hereinafter more fully disclosed.

A head 20 is slidably movable in a longitudinally extending groove or depression 21, havin parallel vertically extending side walls, the depth of which is shown clearly in Fig. 2. In the front end of the head 20, is a vertically-extending hollow boss 22, preferably, reinforced by a rib 23 extending from the upper surface of the head and containing a vertically extending shaft 2%, squared at its upper end, as at 25, for a handle 26. The shaft is provided with an eccentric portion 27 which surrounded with a freely turning roll 28, and spacing washers 29 and 30 are within the cavity 31,provided inthe foremost portion of the head for accommodation of these devices. The rear portion of the head 20, is longitudinally counter-bored, as at 32, concentric with which is a perforation 33 to receive a tension, guide bolt The bolt 3 lis screwed into the vertically extending abutment 18 and is loose or does not fit tightly in the perforation 33 permitting some vertical movement of the head. Within the cavity 31, and engaging the end of the bolt 34 that projects thereinto, i a nut 35, the object of which is to prevent withdrawal of the bolt by the spring 36 pushing the head 20 forwardly to too great an extent. The spring 36 is an open compression coil spring, located within the counterbore 32, and adjustable in strength or tension by another nut 37 on the threads of the bolt 3%. 2i washer 38, which is loose on the bolt 34, is one abutment for the spring. The office of the spring 36 is to yieldingly hold the head 20, forwardly, to permit the roll 28 to be maintained in contact with the work or stock being treated at the time and to yield only when the lapped ends of the stock are introduced between. the die and roll.

The front end 13, of the base 12, is bored, as at 39, to receive a rotatable table 4:0. The bore 39 is lined with a bearing metal, or similar material e1, to reduce the wear by friction, as much as may be. between the retating table and the relatively stationary portions of the base, with which it comes in contact. This bearing lining may be Babbitt, bronze or the like.

The uppcrsurface of the table lO is trued up to receive a removable dic42. The table provides a vertically-extending, integral, hollow pedestal 43, as a support for the die 42. The pedestal d3, of the table, is concentrically bored, as at a l, to provide a power cylinder for a vertically movable piston, or plunger 4:5. Fitted into the open end of the cylinder in the table 40, and operating as a closure for the openin therein, is a closure plate t provided with a downwardly-projccting, hollow hub 47, which guide for the in 48.

Secured to the lower part of the pedestal of the rotatable table, and below the shoulder formed at the lower portion d9 of the base 12, a worm-wheel 50, fixed to the reduced end portion 51 of the cylinder, by a key 52.

An annular casting 53, having an oil receiving depression 5%, is secured to the subbase l-lby bolts 55. t is provided with shaft- bearings 56 and 57, which are preferably integral therewith, for a transverselyextending drive shaft 58. A power pulley 59 is ecured to an outboard end of the shaft 58 to receive a driving belt. The shaft 58 carries between the bearings 56 and 5'7, a drive worm 60, of suitable pitch to mesh with the worm wheel 50, and that is contained in the depression 5% provided in the casting upon which it is mounted. The depression 5a is to be partly filled with oil, or hard grease to lubricate the bearing surfaces of the worm 60 and the worm wheel 50. The front portion of the casting 53 rests upon the lower portion of the pedestal 15, to maintain it in proper relation with the worm wheel.

The lower end of the piston a5 is provided with a packing ring 62, which is held in place by a plate 63 and a series of cap screws 64. On the lower reduced end 51 of the cylinder is secured an anular cap 65, provided with an externally threaded, inwardly bored hub 66. A. gland 67 is threaded on the end of the hub 66, and is provided with a hollow bos that enters the bore of the hub to retain the packing 69 in place in the stufling box around the tube 70. The tube 70 is connected to a pipe or conduit 71, through which a fluid, under pressure, such as air, oil or the like, is passed into the cylinder 72, of the table 40. The annular flange of the cap 67 n'iay be provided, around its periphery, with a series of notches 7 3, in which a top Ta is inserted when the cap 67 has been screwed to the proper point to suiiiciently compress the packing 69 in the stufiing box, to prevent leak around the outer surface of the tube 70. The stop 7%, is an angular bracket provided with a slot 7 5 in it base, for a bolt 76. To

turn the cap 67 to tighten or compressthe packing 69, the stop 74 is first moved radially untilthe vertical portion is withdrawn from the notches 7 3 in the flange of thecap, whereupon the cap is rotated and the stop 74 may then be slid back into the position shown in Fig. 2, within one of the slots or notches 7 3 and the bolt 76 tightened, thereby to prevent the cap 67 from becoming loose.

Screwed into the upper surface of the table 40 is a clamping bolt 77, which passes loosely through the die 42, serving as a driver therefor, and is provided, on .its upper end, with a lateral enlargement 78. A clamp 79 extends across the diametric plane of the cylinder 72, and is provided on its shorter end with a bifurcated projection comprising prongs 80 and 81, which are sufficiently separated to permit insertion of the bolt 77 and which extend downwardly for contact with the bar or stock 82, which is to be rolled around the die into a circumferential form, substantially as shown in Fig. 8. The outer end of the clamping bar 79 underliesthe lateral projection 78 of the vertically disposed pin or stud 77 so that the clamping bar 79 in its position will be relatively loose when the plunger 45 is in the lower end of the cylinder 72. When the fluid under pressure, is admitted into the pipe 71, it passes onto the cylinder 72, under the piston 45 and raises the latter with the pin 48 under the extended longer end of the clamping bar 79. This raises the inner end, 79, of the clamping bar, which is resisted by the laterally extending head 78 of the pin 77 causing the outer ends 80 and 81 of the clamping bar 79, to press firmly with considerable force upon the bar 82 thereby holding the leading end of the bar in intimate contact with the die 42. After the bar 82 has been thus placed in position upon the die the power is applied tothe table 40 through shaft 58 and power wheel 59 which rotates the table and die in the direction of the arrow, shown in Fig. 1. The bar 82 is first heated, then quickly placed in the position described on the die, whereupon the pulley 59 is rotated which, by virtue of the worm carried upon the shaft upon which the pulley is fixed, rotates the worm wheel 50, together with the table 40. At the same time the handle 26 is grasped, by the operator, and pulled in the direction shown by the arrow (in Flg. 1)

which causes the roll 28 to be forcibly pressed against the bar 82, as the result of the eccentric 27 upon the vertical shaft 24, thereby intimately rolling and compressing the metal of the bar 82 into contact with the die 42 and producing a bending and rolling operation which tends to take out, or elimiits original shape; The rolling effect has a tendency to, and materially does, prevent decrease in the cross-sectional area of the outer surface of the bar, with which the roll 28 comes in contact, and, therefore, when the final end of the bar passes between the die 42 andthe roll 28 it is pressed into intimatecontact with the die and has no tendency to spring out of the shape in which it has thus been placed. Consequently, the ring formed by this means of bending and rolling is true to the die. 7

In rolling the ring, in the manner described, the spring 36 is su'liiciently strong to normally maintain the head 20 in the desired.

position without materially yielding but should a substantially irresistible obstruction, such as the ultimate lapped endsof the bar 82, be encountered, between the die 42 and the roll 28, the spring acts as a safety member and permits the head 20 to approach nearer the abutment 18 to accommodate the increased cross-sectional area that has thus been introduced between the die and roll.

In Fig. 10 the bar or stock of which the ring 82 is to be made, is shown to be providedwith scarfed ends 83 to facilitate welding together of the terminal ends of the ring. It is not entirely essential that the ends should be thus scarfed and there fore where the scarfing of the ends is omitted, the safety spring 86 performs a very important service in the operation just described.

Referring to the modification illustrated in Fig. 5 I have shown an additional roll 84 which is 'mounted on a horizontal axis secured to the outer end 20 of the head 20, as at 85, and which overlies the top surface of the bar 92 to hold it flat upon the die to prevent it from twisting or warping during the process of bending and rolling.

In Figs. 6 and 7 I have shown my machine adapted to roll rings, or the like, from angle-bar or channel-bar stock, such as the bar 88, which is provided with a verticallyextending web 89 and a longitudinallyextending web 90. When it is desired to roll a ring of this character, with a vertical web 89 on the inside of the ring, as shown in Figs. 6, 7 and 9, the roll 28 is somewhat modified, as at 28, in Fig. 7. When the stock of this character is used it is necessary to move the head 20 a considerable distance rearwardly so that the roll 28' may be made to clear the stock 88 and, therefore, I provide a longitudinally movable sub-head 20 having an abutment 18 and movable upon the basel2 in the same manner, but to a greater extent, than the head 20 is movable upon the said base. In this structure I preserve the relation between. the abutment 18 and the head '20, using a safety spring,-as in the former described illustration.

I shown in Fig. 2, thereby relieving the clamp In order to retract the head 20 quickly, after the ring has been formed of the angle bar 88, I provide a togglejoint 19, consisting of the hand lever 91, pivoted to the base 12, as at 92, and provided with an inner end 98, which is pivoted to a linearly-adjustable turn-buckle link 94, as at 95, and which in turn is pivoted to the head 20 as at 96. To retract the head 28, it is only necessary to depressthe handle 91, which will break the toggle 19, and permit the head 20 to be the horizontal webs of the angle bar upon the other of the similar kind, I provide yielding means to permit the vertical displacement of the roll 28, consisting of the vertically disposed rods 100, 101 which are secured in the base 12, as shown in Fig. 3, and which pass through slots 102, 103, respectively, in the head 20, and each provided on its upper end with open compression springs 101, 105, respectively, the lower ends of which bear against the head 20 and the upper ends against washers 106 held on the bolts or rods 100, 101 by nuts 107, which are adjustable thereon, for changing the tension of the springs 10% and 105. By this means the roll 28, together with the head 20, will be lifted slightly in vertical planes to compensate for any undue thickness, such as that which. may be interposed by the overlapped ends of the ring. The springs 10 1 and 105 are of sutlicient strength to hold the roll 28 in its normal position under ordinary conditions of operation.

In rolling rings of angle bars, 88, I prefer tohave the greatest amount of pressure exerted by the roll 28 upon the lower horizontal flange 90, as shown in Fig. 6, as there is considerably more stretch on this portion, due to the curving of the bar, than there is on the vertical flange 89. Fig. 6 shows that the flange 90 is somewhat compressed, to

compensate for any transverse attenuation of that portion of the bar due to the stretching efi'ect.

After a ring has been rolled by my machine, in a manner heretofore described, the fluid under pressure in the cylinder 72, is released, whereupon the piston 4E5 will descend into the position, substantially as that sition of the parts within the scope of the.

appended claims.

Having described my invention, what I claiinis 1. In a machine of the character described, the combination with a power driven, rotatable die,- to which to secure one end of the bar to be rolled thereabout into a ring, or the like; of a roll, rotatable by contact with the bar and movable vertically and radially with respect to the die; a con trollable yielding means to force the roll into.

contact with the bar to upset and bend the bar and to force it into intimate contact with the die, and yielding means upon which the roll is mounted, to permit vertical and radial movement thereof, when abnormal re sistance is encountered thereby.

2. In a. machine of the character described, the combination with a power driven rotatable die, to which to secure one end of a bar to be rolled thereabout into a ring, or the like; of a roll, rotatable by contact with the bar;- a' manually operable means to move said roll radially with re-' spect to the die, to exert a variable pressure on said bar being rolled, to force it into com tact with said die, and automatic means, operable independently of said manual means, to permit vertical and radial displacement of said roll to compensate for ab-.

normal resistance interposed between said roll and die.

, 3. In a machine of the character described, the combination with a power driven rotatable die, to which to secure one end of a bar to be rolled into a ring; of a roll, rotatable by contact with the bar and movable radially with respect to the axis of the die; means to force the roll into contact with the bar to upset and bend the bar and to force it into intimate contact with the die, means for permitting bodily movement of the roll on lines intersecting its path of radial movement, and yieldable means opposing said bodily movement of the roll.

4. A machine of the character described, comprising a base; a pedestal-table, rotatable thereon, having a cylinder in said pedestal, a removable die, rotatable by the table; a clamping bar to hold the work on the die; a piston in said cylinder, movable to holdthe clamping-bar in engagement with the work, and a conduit whereby a motive fluid may be introduced Within said cylinder to move the piston to operate said clamp thereby to hold the Work to the die.

5. A machine of the character described comprising a base; a pedestal-table rotatable thereon, having a cylinder in the pedestal thereof; a removable die, rotatable by the table; a clamping-bar extending to the axis of the table, to hold the Work on the die; apivotal support for the clamping-bar near the periphery of the die; a piston in said cylinder, movable to raise the inner end of the clamping-bar to press the outer end thereof into engagement With the Work; a conduit for introducing a motive fluid within said cylinder, to move the piston to operate the clamping bar, and means secured to said cylinder to rotate said die.

6. A machine of the character described comprising a base; a pedestal-table rotatable thereon, having a cylinder in said pedestal; a removable die, rotatable by the table; a clamping-bar, extending to the axis of the table, to hold the Work on the die; a pivotal support for the clamping bar, near the periphery of the die; a piston in said cylinder, movable to raise the inner end of the clamping bar to press the outer end thereof into engagement With the stock; a conduit, for introducing a motive fluid within said cylinder, to move the piston to raise the inner end of said clamping bar; a head radially movable with respect to the axis of the die, a roll, carried by the head, for engagement With the stock to be rolled about the die, and means for moving said roll into contact with said stock.

7. A machine of the character described comprising a base; a pedestal-table rotatable thereon, having an axially disposed cylinder in said pedestal; a removable die, rotatable by the table; a clamping-bar, extending to the axis of the table, to hold the Work on the die; a pivotal support for the clamping-bar near the periphery of the die; a piston in said cylinder, movable to raise the inner end of the clamping-bar to press the outer end thereof into engagement with the stock being operated upon; a conduit, for introducing a motive fluid within said cylinder, to move the piston to operate said clamping bar; a head, radially movable With respect to the axis of said die; a roll, carried by said head for engagement With the stock to be rolled about said die; means for moving said roll into contact With said stock and yielding means to permit radial and vertical displacement of the roll when abnormal resistance between said die and roll is encountered.

8. A machine of the character described comprising a rotatable table, a die carried thereby, a pin extending through the die and into the table to make driving connection therebetiveen, a Work clamping lever fulcrumed on the upper end of'the pin and a fluid actuated piston carried by the table for applying pressure to the free end of the lever to clamp a piece of Work to the die.

9. A machine of the character described comprising a rotatable table, a die carried thereby, a pin extending through the die I and screw threaded into the table to make driving connection therebetvveen, a head formed on the upper end of the pin, a Work clamping lever having a forked end to straddle the pin and underlie the head, and a fluid actuated piston carried by the table for applying pressure to the free end of the lever to clamp a piece of Work to the die.

In testimony whereof I hereunto set my hand in the presence of tWo subscribing Witnesses.

ARTHUR L. WARNER.

In the presence of H. AmswoRTH, G. R. ROSBOROUGH.

@opiea of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G.

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