US2312225A - Machine for treating the edges of casings - Google Patents

Description

Feb. 23, 1943.

I J. w. WILKINSON MACHINE FOR TREATING THE EDGE OF A CASING 'Filed May 20, 1940 AWN A TTORNEYS.

I Filed May 20, 1940 4 Sheets-Sheet z IN V EN TOR. .fames W T l l'yflzhaalz A TTORNEYS.

Feb-23, 1943. J. w. WILKINSON MACHINE FOR TREATING THE EDGE OF A CASING 7 Filed May 20, 1940 4 Sheets-Sheet 3 A TTORNEYS.

Feb. 23, 1943. J. w. WILKINSON v MACHINE FOR TREATING THE EDGE OF A CASING 4 Sheets-Sheet 4 Filed May 20, 1940 INVENTUR. fimes Wad/17280 A TTURNEYS.

Paientcd Feb. 23, 1943 A UNITED STATES PATENT OFFICE 7 mm: a

James W. Wilkinson, Providence, It. Lassig'norto Flam Corporation, a corporation of lthode Is- Application on, so, isia'serisi No. 336,154 6 Claims. (cl. 153-2) This invention relates to a machine for operat- Fig. 12 is a sectional view of a fragmentai poring upon the edge portion of a casing to suitably tion of the casing. a form the edge portion into desired shape. In operation upon a casing where it is desired The invention has for one of its objects to to deflect the edge of the stock of the casing and provide for the working upon the edge portion there is a change of diameter of the stock, it is of a casing closer to the edge of the casing for known that unless there is a substantial amount manipulating the stock thereof than any maof stock to aflord a good grip on the free edge chines with which I am familiar. of the casing by the rolls which deflect the stock,

Another object of the invention is to provide a an axial movement because of such insuflicient finished surface on the edge of the casing withgrip on the stock by the rolls occurs; and further, out grinding. 1 when such manipulation is attempted, there is a Another object of the invention isto deflect the r gged edge P ovid d n h edge of the casing portion of the casing spaced back from but close which is gripp d. It has heretofore been thought to the edge and at the same time finish the edge by many that a machine to deflect the stock of ofthecasmg. the casing closely adjacent the edge thereof in Another object of the inventionis to provide for a c s n f u stan a sa ce where a lar e the accommodations of cases of varying lengths o n 1 Pressure was r ired would be imltl u any adjustment m 1 t appractical. I, however, have provided for the holdmtus, ing of the casing up into the position in which Another object of the invention is to hold the it is to be operated upon by e rolls b a fluid casing in the position in which it is to be oper- Pm m 1mm, permmmlf ated by a flexible means and yet one whi h has substantial flexibility and a large range of stroke considerable latitude through which its action is o mf m 23" applied. I Y g Another object of the invention is to bring suf- M Mum but by providing mm means flcient pressure to bear upon the edge of the casg i g gg gr s e edge to permit 5:: the edge the; to a my W hmmsmzh mzrsizessz n Mam finished Another object of the invention is to provide for :5; g to edge thus permitting not the cycle of operations through which the mathe flashing of g ggg m ag i m $fifi iifsiffiii ifiii $mh in view the inm the same machine and at the time and the following is a more detailed description of vention consists of certain novel features of construction as will be more fully described and the mt emlt Eminent of this invention mus- 1 trating the preferred means by which these adparticularly pointed out in the appended claims. mm d m vantageous results may be accomplished.

panying In 8 with reference to the drawings, the machine Fig. 1 is a side elevation of the machine; which I provide consists essentially of 11- 8- 2 is a sectional view thro h the e 9- actuating head portion designated generally ll porting and end pressure-appl in structure of (see Fig. 4) and a tail supporting end pressurethe machine; applying P rtion of the machine desi ate Fig. 3 is a section on line 3-4 of Fig. 1; generally Ii which is actuated in time with th: P 8. 4 is a p plane view of the machine; head end of the machine through suitable auto- Flg. 5 is a, sectional view taken on Substantially matic controls. The machine is assembled upon line 3-5 of Fig. 1; a suitable table i1 supported above the floor and Fig. 6 is a sectional view taken on line H of th hich certain power-applying means 18- show g the cam for op ating the to such as an electric motor, gears, sprocket chains Fig. 7 is a section on line '|''l of P18. 5; r or other power-transmitting devices to be em- Fig. 8 is a iragmental view partly in section ployed are t supportediiiustrating the action of the rolls upon th edg The base of the head end of the machine l of the work; is provided with abearer roll l9, see Fig. 8, which Fig. 9 is a side elevation of a fragment of the is removably secured to and rotatably supported mechanism which mounts the abutment rolls for by shaft II in suitable bearings 2| in the base ll.

facing the edge of the casing; A frame 22 surrounds the reduced portion 23 of Fig. 10 is a face view, of the rolls for abutting thisroll and shaft II and has removably mounted th edge of th asi g; thereon studs 21 secured by threads 28 for ro- Fig. 11 is a diagrammatic view largely exagablv supportin the eon o s 24 ounted upon gerated, illustrating the action or the three abutball bearings 25. These rolls :4 are l t t ting rolls in their various positions as they afl'ect a pl rality of suitable locations such, for inthe edge of the casing; Y to stance, as at degrees apart and the same distance from the center of rotation of the work so as to engage the edge of the work 26 which would be moved toward their cylindrical surfaces. This center is lower than the center of the smaller support roll IS. The frame 22 in which these rolls are supported is fixed with reference to the base It toward and from the bearer roll l9.

Drive is applied to shaft (see Fig. 3) by 1 means of gear 36 mounted upon one end thereof which is a sprocket gear and which is driven by sprocket chain 31 from some suitable source of power such, for instance, as from beneath the table or bed plate ll. Gear 82 on shaft 2| drives gear 28 upon shaft 35 which in return drives gear 38 upon shaft 24 which in turn drives gear 40 upon shaft 32 for the rotation of the former roll.

The former roll 20 is provided with a groove 4| and the bearer roll'lS is provided with a rib 42 which cooperate to provide for the deflection of the stock from the inside of the casing 24 outwardly when pressure is applied. The frame 23 is swung to apply pressure on the roll 34 by reason of its arm 43 to which link 44 is connected to be operated by the toggle lever 45, 46 moved through a cam 41 engaged by the cam follower 42 which is urged toward the cam by the action of the spring 49 tending to move the cam follower into engagement with the cam. This cam is mounted upon shaft 50 which shaft is rotated by gear II and sprocket chain it (see Fig. 4) from sprocket gear 8| driven from shaft I rotatably mounted beneath the table. The link 44 is adjustable as to length in any known manner and is connected by a bifurcated stirrup 44' to the toggle lever. The toggle portion 46 comprises spaced levers pivoted as at 54 between the pair of standards 53 and are L-shaped to mount the cam follower roll 4' upon pivot 54 extending between them while at the elbow the link member 45 is pivoted on a pin 55 also extending between these levers and is connected to the adjustable link stirrup 44 between the fork parts thereof by a pin 56 which has rolls I6 slidable in slots 51 of the pair of standards ll.

Shaft II also has upon it another cam for controlling the pressure applied by the free rotating tail center it which I will proceed to describe.

The tail center It has a base having a guideway I upon which the carriage 61 is slidably mounted. A holder consisting of a cup-shapedv device 6| shaped as at 69 to receive the rounded end III of the work 26, is secured upon shaft II which is rotatably mounted in ball bearings 12 for permitting the free rotation of shaft ll. Tie

is supplied to the valve 81 from some suitable source through conduit 9| and reducing valve 92 regulated by handle 93, the pressure of which may be indicated by dial 94. The exhaust of the air may be through conduit 95 leading from the valve II.

A tangent to all of the rolls 24 at right angles to the axis of the work and at their engaging edges is not in the same plane; rather, the tangent of one of the rollers designated 24' in Fig. 11 is in a plane to force the edge inwardly as exaggeratedly shown therein as at 96. The tangent of the next roll 24" is in a plane which would force the edge inwardly slightly further as at 91 whereas the tangent of the third roll is in a plane which would force the edge inwardly still further as at O8 to the finish position. These rolls progressively move the stock to the desired position rather than attempting to do so all at one time. Further, the rolls l9 and 3| will cause the stock at the edge 09 spaced inwardly from the head I" to'be of a lesser internal and external diameter than the main portion of the casing 28 (see, for instance, Fig. 8 or Fig. 12)

In operation the attendant will position the casing 28 so that its edge will abut the rolls 24 rods 13 extend through the carriage and bind a plate 13, washer I5 and collar 16 in position on the threaded stud TI. This free rotating tail stock is forced forwardly through plunger II and double acting piston 19 in the drum II having heads 22 and ll bound in place by tie rods 04 for forcing the work 2 against the rolls 24.

The piston 19 in the drum ll is controlled by air pressure conduits I! and '4 connected to a valve ll having an arm 84 with a cam follower; IQ thereon to engage the cam 8| secured on and as the machine is running the cam 90 will first cause air pressure to be supplied to the free rotating tail center to force the work firmly against the rolls 24 next in sequence of operations. The cam 41 will through toggle lever formed of links 46 and 45 and through adjustable link 44 move the frame 32 downwardly to cause the roll 30 to engage the edge of the work forcing it, against the bearer roll [9. Through this firm grip on the work the work will 00.nmence to rotate and at the same time the head will be formed on the edge of th work while by reason of the air forcing in the edge of the work against the rolls 24, the edge of the work will be deflected and smoothed out and finished in substantially a single plane and to the breadth desired dependent upon the degree to which it is forced. I will usually not deform the edge to an extent sufllcient to increase its thickness but I may do so if desired. The edge, however, is brought inwardly to a slightly lesser diameter by shape of rolls l9 and 30 which assists in centering this edge in its position against the gasket of the cover as is more fully explained in my 00- pending application, Serial No. 285,476, filed July 20, 1939.

The toggle action is at first rather gentle by reason of the toggles being at an angle but as the rolling of the stock progresses, the toggle is brought to apply greater pressure upon the work being forced inwardly positively to a greater extent by the cam 41 so as to increase the pressure greatly upon the edge of the work operated upon. After a predetermined number of revolutions of the work which is free to rotate by reason of the tail center in this ball bearing through which pressure is also applied, the toggle levers are retracted; the pressure in the tail stock drum reversed so that the operator may remove the casing fom the machine and place another one in position to be operated upon during theinterval that the roll II is raised that the cycle of operaions may be repeated.

I claim:

1. A machine of the class described for operating up n the edge of a hollow, cylindrical casing, comprising rotary means for supporting and urging the casing axially in one direction,

shaft ll for actuation of the same. Air pressure m mm of freely. rotatable 11 means porting said rolls arranged to present them to bear against the end of the casing in the direc tion of its length as it is forced axially against the operating surfaces of said rolls and in a manner so that the rolls will independently and successively operate upon each part of said end to progressively deform the stock of the casing edge inwardly and longitudinally of the casing to cause said edge surface to be deflected, smoothed-out and finished in substantially a single plane, and means including a positively driven roll'to rotate said casing operative simultaneously during deformation of said end edge thereof and adapted to provide a bead onthe outer surface of the casing closely adjacent said end edge.

2. In a machine of the character described for operating upon the .edge of a casing, a pair of positively-driven, bead-forming rolls, one to engage the outer and the other the inner cylindrical surfaces adjacent the marginal edge' of a casin said rolls being provided with a complementary roove in one and a rib on the other to roll a bead on the casing adjacent the end edge thereof, when the rolls are brought into cooperating rela tionship and in operative engagement with the inner and outer surfaces of the casing, a plurality of rolls arranged to bear against the end edge of the casing in a manner so that the rolls will successively. operate upon each part of said end to deflect, smooth-out and finish the end surface in substantially a single plane, means for urgin the casing in an axial direction and forcing it against said end-finishing rolls, toggle levers to move one of said rolls toward and from coacting relationship with the other, and a cam for actuating said toggle levers to effect firm gripping engagement of said bead-forming rolls with the edge portion of the casing to rotate the casing and form a bead thereon close to the end of the casing simultaneously with the deflection and finishing of the end edge of the casing by said endnnishing rolls.

3. In a machine of the class described, a pair of positively-driven rolls one to engage the outer and the other the inner marginal-edge of the side wall of a casing, one of said rolls being provided with a circumferential groove and the other with a circumferential rib to roll a bead n the casing adjacent the end edge thereof at a distance not greater than the thickness of the stock of the casing when the rolls are brought into coacting relation and in engagement with the casing side wall at opposite portions thereof, pivoted means rotatably mounting one of said rolls for swinging movement toward and from the other roll, fluidactuated means for flexibly urging the casing axially in one direction, a stationary support, and a plurality of rolls loosely rotatable upon said support and equally spaced from each other and the axis of rotation of the casing, said last-named rolls having their respective cylindrical operating surfaces disposed in different planes parallel to each other and at right angles to the axis of rotation of the casing, and being arranged to bear against the end of the casing in the direction of its length in a manner so that-the rolls will independently and successively operate upon each part of said end edge of the casing to progressively deform any metal projections at the casing edge incident to endwise fiow of the metal of the casing during formation of the bead to cause said edge surface to be deflected, smoothed-out and finished in substantially a single plane.

4. In a machine for operatin upon an end portion of a hollow cylindrical casing, the combination of a pair of positively-driven bead-forming rolls to be moved into and outof coacting relationship to form a circumferential bead at the marginal edge portion of a casing close to one end thereof when the casing is positioned between said rolls, one of said rolls being provided with a circumferential rib and the other roll having a groove for cooperating with the rib of said first roll, a pivoted carrier mounting one of said beadforming rolls for swinging movement toward and from the other roll, a plurality of rolls arranged to bear against the end edge of the casing to operate in succession on each portion of said edge to deflect, smooth-out and finish the end surface in substantially a single plane as the casing is rotated and forced in an axial direction against said end-finishing rolls, fluid-actuated means for rotatably supporting and urging the casing in a longitudinal direction toward said end-finishing rolls, toggle linkage for moving said pivoted carrier and its associated bead-forming roll into and out of operating position relative to the other bead-forming roll, a cam for actuating said toggle linkage to effect firm gripping engagement of said bead-forming rolls with the wall of the casing close to an end thereof to rotate the casing and form a bead thereon, and a second cam operable in timed relation with said first cam for actuating said fluid pressure support means for the easing to force the casing in a longitudinal direction firmly against the end-finishing rolls as the bead is being formed in the casing and simultaneously finish said end edge.

5. A machine of the class described for operating upon the edge of a hollow cylindrical casing comprising means for supporting and urgin the casing axially in one direction, a plurality of freely rotatable rolls, support means for said rolls arranged to present them to bear against the end of the casing in the direction of its length as it is forced axially against the operating surfaces of said rolls and in a manner so that the 7 rolls will independently and successively operate upon each part of said end to progressively deform the stock of the casing edge to cause said edge surface to be deflected, smoothed-out and finished in substantially a single plane, and a pair of positively driven bead-forming rolls to rotate said casing during deformation of said end edge and adapted to press the metal of the wall of the casing radially outwardly to provide a bead on the outer surface of the casing closely adjacent said end edge.

6. In a machine of the character described for operating upon an edge surface of a hollow, cylindrical casing, means for supporting said casing, means for rotating the casing, means for urging the casing axially in one direction, a plurality of spaced rolls, means to mount each roll to rotate about an axis extending generally perpendicular to the axis of rotation of said casing, so as to present their circumferential surfaces to said edge surface, and said means presenting the tangent of each roll, at the point of contact of each of said rolls with said edge in a plane advanced a selected distance from that of the previous roll to successively step by step engage said edge. so as to operate thereon to progressively deform the casing edge to cause said edge surface to be deflected, smoothed-out and finished in substantially a single plane.

JAMES W. WILKINSON.

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