US2421450A

US2421450A - Metalworking machine for rolling grooves in cylinders without damaging longitudinal seams

Info

Publication number: US2421450A
Application number: US554259A
Authority: US
Inventors: Arthur J Barrie; Raymond J Dwyer
Original assignee: ACORN DESIGNING CO
Current assignee: ACORN DESIGNING Co
Priority date: 1944-09-15
Filing date: 1944-09-15
Publication date: 1947-06-03
Anticipated expiration: 1964-06-03

Description

June 3, 1947.

Y A. J. BARRIE ET AL- 2,421,450 METALWORKING MACHINE FOR ROLLING GROOVES IN CYLINPERS WITHOUT DAMAGING LONGITUDINAL SEAM Filed Sept. 15, 1944 6 Sheets-Sheet 1 INVENTORS 112mm! J. BARE/.5 y Ramona J: 17mm June 3, 1.947. A. J. BARRIE ET AL 2,421,450

HINE FOR RQLLING GROOVES IN CYLINDERS WITHOUT DAMAGING LONGITUDINAL SEAM METALWORKING MAC Filed Sept. 15, 1944 6 Sheets-Sheet 3 INVENTORS amar:

.Dwvsn- .AE THUR J, .E! 1%; YMDND June 3, 1947.

METALWORKING MACHINE FOR ROLLING GROOVES IN CYLINDERS WITHOUT DAMAGING LONGITUDINAL SEAM 6 Sheets-Sheet 4 Filed Sept. 15, 1944 A. J. BARRIE ET AL YJNVENTORS ARTHUR 1.3mm:

Fin MUN; 1]. DWI ER A TT ORNE Y June 3,1947. A. J. BARRIE ET AL 2,421,450 METALWORKING MACHINE FOR ROLLING GROOVES IN CYLINDERS WITHOUT DAMAGING LONGITUDINAL SEAM Filed Sept. 15 1944 6 Sheets-Sheet 5 June 1947- A. J. BARRIE ET AL 2,421,450

METALWORKING MACHINE FOR ROLLING GROOVES IN CYLINDERS WITHOUT DAMAGING LONGITUDINAL SEAM Filed Sept. 15, 1944 6 Sheets-Sheet 6 HEAD VALVE GROOVER VHLVE 14 157 154 6 147 149 u 7 T M7 7* INVENTORJ' ARTHUR .I BARBIE JEYIEYMUNJJ J .UWYER Patented June 3, 1947 METALWORKING MACHINE FOR ROLLING GROOVES IN CYLINDERS WITHOUT DAM- AGING LONGITUDINAL SEAMS Arthur J. Barrie and Ba hio,'assignors to Aco ymond J. Dwyer, Toledo, rn Designing 00., Toledo,

Ohio, a corporation of Ohio Application September 15, 1944, Serial No. 554,259

14 Claims. 1

This invention relates to metal working machines and more particularly to machines for impressing configurations in sheet metal.

The invention embraces the provision of mechanism for impressing grooves into cylindrical tubing or pipe fabricated of sheet metal.

The invention comprehends the provision of mechanism, substantially automatic in its operation, for simultaneously impressing or rolling a plurality of grooves or depressions in the walls of tubular members.

An object of the invention resides in the provision of automatic means for positioning a tubular member upon which work is to be performed in the machine, and of means brought into 0peration after positioning of the tubular member for rolling a groove in the wall thereof.

Another object is the provision of means automatically brought into operation after work has been performed upon a tubular member for, discharging the latter from the machine, and for automatically resetting various elements in position to receive and perform work upon tubular members successively supplied to the machine.

Another object is the provision of a machine of this character embodying electrically initiated, hydraulically operated mechanisms for causing the successive functioning of various elements of the mechanism whereby work may be quickly and inexpensively performed upon work supplied to the machine.

Still another object is the provision of a machine adaptable for performing Work upon metal articles wherein various mechanisms and components of the machine are rendered adjustable to adapt the machine to receive work of varying dimensions and sizes thus greatly enhancing the utility of theinvention.

Further objects and advantages are within the scope of our invention such as relate to the arrangement, operation and function of the related elements of the structure, to various details of construction and to combinations of parts, elements per se, and to economics of manufacture and numerous other features as will be apparent from a consideration of the specification and drawing of a form of the invention, which may be preferred, in which:

Figure 1 is an front elevational View of the machine of our invention;

Figure 2 is an end elevational View of the machine shown in Figure 1;

Figure peripheral cylindrical 3 is a front elevational view of a portion of the mechanism, certain parts being shown in section;

Figure 4 is a vertical sectional View taken substantially on the line 44 of Figure 1;

Figure 5 is a detail view showing the work support in operative position;

Figure 6 is a. view similar to Figure 5 showing work supporting means in non-operative position;

Figure 7 is a top plan view of one end of the machine;

Figure 8 is a detail sectional view taken substantially on the line 8-8 of Figure 4;

Figure 9 is an end view of a portion of the machine illustrating cam mechanism for controlling certain elements of the mechanism;

Figure 10 is a semi-diagrammatic view illustrating part of the hydraulic system forming part of the invention; and

Figure 11 is a schematic View of the electrical circuits and control elements of the machine.

While we have illustrated the machine of our invention as particularly adapted for rolling or impressing circumferential depressions or grooves in a thin walled cylindrical member as, for example, muffler shell, it is to be understood that the machine may be used for performing work on other items wherever it may be found to have utility. As illustrated, the machine is shown as adapted to impress a circumferential groove in the wall of a mufiler shell adjacent each end thereof to provide an abutment to position end heads afterwards inserted in the ends of the shell. The l achine of our invention is inclusive of means for preliminarily supporting the shell or other work, means for centering or positioning the shell in the machine, groove impressing means, work or shell discharging means and other adjuncts and mechanisms forming elements of the invention.

Referring to the drawings in detail, the apparatus is inclusive of a frame H), which in the embodiment illustrated is of hollow configuration, having a machined bed surface ll. Disposed within the interior of the hollow frame .housing I l) is a, supporting structure I 4 upon which is mounted a motor l5 adapted to be operated by electrical energy. The motor I5 is arranged to drive a fluid or hydraulic pump 16 of conventional design, which is connected to a reservoir H by means of a tube Hi, the reservoir l'l containing oil or other suitable fluid for actuating various elements of the machine or apparatus, as hereinafter described. The motor, fluid pump and reservoir components may be positioned exterionly of the machine if such arrangement is desired without departing from the spirit of the invention.

The frame It is formed with a horizontal surface 2I arranged rearwardly and above the surface H and is adapted to support a pair of brackets 22 and 23 arranged in spaced relation and secured to the frame I I by means of bolts 24. The bracket 22 and 23 are formed at their upper portions with bosses 21 bored to journally support a shaft or arbor 28. Mounted upon a portion .of shaft 28 projecting outwardly of bracket 22 is an arm 29 which is secured to and adapted to rotate with the shaft 28 by means of a key 36. A clevis 3| is connected to the outer end of 'the arm 29 by means of a pin 32. Secured to an interior lower wall portion of the frame til is a bracket 35 to which is articulately connected a cylinder 36 by means of a pin 31. Slidably disposed within the cylinder 33 is a piston 38 carried upon the lower end of a rod 39 the upper extremity of the rod being threaded into an opening in the clevis 3!, the rod being locked to the .clevis by means of a nut 43. The upper end of cylinder 36 is provided with a head 4i through which extends the rod 33,

a stuffing gland of conventional construction beingmounted in the head-4 l to prevent leakage of fluid along the rod 39. I

The shaft 28 is adapted to support the grooving means for impressing grooves in the work W. The grooving means is inclusive of a pair of similarly shaped, spacedsectors or members 44 which are formed with enlarged hubs or bosses 46, the latter being bored to snugly fit but be slidable along the shaft 28. The interior ofeach hub portion 46 is provided with a recess adapted to accommodate a block oryhey 41, while the shaft 28 is formed with a land :or flat surface 48 arranged to fit and coincide with the .fiat surfaces of the blocks 41. Each of the hubs '46 is provided with a pair of threaded openings adapted to receive screws for :direct engagement with the blocks 46 for :fixedly "securing the sectors in adjusted position on the shaft 213 The arcuate surface of each of the sectors is adapted to receive and position an arcuately shape-d tang '52-formed upon a removable die or member 53. The die 53 is provided with a plurality of radially arranged openings to accommodate screws 3-4 which are threaded into registering threaded openingsrin the sectors in order to retain the dies securely assembled to the sectors 44. Each die member 53 isinteg-rally formed with an arcuate projection 55 configurated to impress or form a suitable depression o groove in the work in a manner to be hereinafter explained.

The surface II of the machine frame provides a support for a pair of spaced work supporting means 58 and :59. As each of :the work supporting means are of identical construction, a detailed description of-one of said means will suffice. Each work supporting means is inclusive of a base plate 60, the iower surface being formed with a longitudinally arranged recess adapted to receive a strip or key 16!. The strip depends from plate 69 and snugly fits into the throat portion -62 of a longitudinally extending recess 63 of 'T-shaped cross section formed in the frame structure I0. The baseplate wissecured to the frame by means of I -shaped bolts 64 mating in the recess-63, the

'bolts receiving nuts -63 to secure the plate 60 in position upon the surface II. By releasing the .nuts 65, the base plate 'may be adjusted longitudinally of the machine frame to adapt the :ma-

chine for work-of varying lengths.

Each base plate 30 supports a member 66, the lower surface of member 66 and the upper surface of plate having transversely arranged registering slots to accommodate keys or strips 68 for maintaining the plate and member I56 in proper relationship. The member 66 is formed with elongated transversely extending slots to receive bolts 61 for securing the member 66 to the plate 60, nuts 68' being threaded on bolts 61 to secure the parts together. By releasing the nuts 68', the member 6.6 may be adjusted transversely of plate :60 to secure proper alignment of both work supporting

head structures

58 and 59. Each member '66 is formed with integral upwardly extending head I3 is resiliently held in its normal position by means of expansive coil springs I4, the latter surrounding studs 15 threaded into openings in the member 66. Ihe required stress may be placed upon the springs by adjusting the nuts 16 engageable with washers 11 arranged above the springs, lock nuts 18 being used to maintain the adjustment. The purpose of the resilient positioning means for the head is to providea relief in the event that the grooving die inadvertently over-rides a scam in the work.

Referring especially to .Figure 3, each head I3 is formed with a generally cylindrical portion within which is disposed a pai of spaced bearings .or bushings and 8!, which support a cylindrical sleeve 82, the latter being slidable in bearings 80 and 81. Secured to one end of sleeve 32 is a circular plate 83 fastened by means of screws 84, the plate 83 having .a threaded opening to receive a rod 85., the same being retained in position by a nutfifi. Disposed at one end of head .13 i a cylindrical extension or member 81 held in place by screws 88. Secured to member 31 is a circular plate 89 held in place by screws 90, the plate supporting a fitting 91, the latter provided with a cylinder 92. Slidably disposed within the cylinder is a piston 33 which is connected to the end of rod 85. The fitting 9I is provided with a stuffing gland 94 of conventional design surround- .ing the piston rod to prevent leakage of fluid from the cylinder 92. The cylinder is provided with connections or

fittings

98 and 39 for the admission to and withdrawal of fluid from the cylinde BZfQractuating the piston 93.

Positioned within the sleeve 82 are anti-friction or ball bearings I 0.8 and IN spaced apart by means of .a spacer or sleeve I92. Journaled in the bearings Iflll and IBI is a shaft IIJ3 having,

at its forward end, an enlarged head I04. The shaft I03 is held in assembled relation with the I00 and Ill! by means of nuts I05 threaded on to a reduced tenon portion at the other end of the shaft. Mounted upon the shaft head I04 is a generally cylindrical member or mandrel I38 which directly engages and supports the work W during work performing operations. The mandrel I08 is secured to the head PM by means of screws I09, and is formed with :an annular depression or groove III), which, in

effect, becomes the female portion of a die for forming a groove or depression III in the work W.

V In forming grooves adjacent the ends of a muflier shell or work W, it is imperative that each groove I Il be equidistant from the end of the shell, and we have provided means for automatically positioning the shell with respect to the grooving dies 55, H for accomplishing this purpose. An abutment I I4 in the form of an annulus is slidably mounted exteriorly of the mandrel I08, the abutment II4 being provided with a peripheral flange or projection II5 which extends into an annular recess formed in an abutment retaining member In. The latter is secured to an annular member H0 by means of screws H ll, the member II8 being secured to the housing 58 by means of screws I20. The recess in the retaining member H1 is of a dimension to permit limited longitudinal movement of the flange H5 and abutment I I4 so that the abutment I I4, in engaging the end wall or edge of the work, may move relative to the retaining ring Ill.

The abutment or work positioning stop H4 is resiliently urged toward its outermost position by spring means. An annular member I23 slidably supported upon the shaft head I04, and another member I 24 threadedly mounted on head I04, are formed with a plurality of aligned openings in which are disposed expansive coil springs I26. The position of member I24 may be adjusted by manipulation of the same and locking member or nut I21 also mounted upon a threaded exterior portion of the shaft head I04. We have found that it is desirable, in order to satisfactorily equalize the work between the supporting heads, that the springs I26 be of varying expansive force. In practice we have found that the use of nine springs, in sets of three, each set of slightly different expansive pressure enhances the equalization in positioning the work, although any number of springs of equal or non-equal force may be utilized without departing from the spirit of the invention.

Our invention is inclusive of means to receive and temporarily support the work W prior to engagement of the mandrels I08 therewith. To this end there is secured to each of the bosses II of member 66, a bracket I30 retained in position by screws I3I, each bracket supporting an electrically actuated solenoid I32. The bosses II also support brackets I34 each secured by means of a screw I35 and a guide pin I36. The screw I35 and pin I36 project into elongated slots in bracket I34 so that the latter may be adjusted in a vertical direction. Pivoted or fulcrumed to the upper portion of each bracket I34 by means of a bolt I31 is a lever I 38 having converging upper surfaces I39, I40. The levers I38 are formed to receive removable inserts or fittings I29 which may be of different sizes in order to accommodate diiferent sizes of muflier shells, the inserts being secured by means of screws I33. These inserts engage and support the work W as shown in Figures 4 and 5. An arm of the lever I 38 is pivotally connected to a clevis I 4| to which is connected the armature I42 of the solenoid I32. The lever I33, in its work supporting position as shown in Figure 4, is maintained therein by the electrical energization of the solenoid by a circuit controlled by cam means hereinafter described. When the solenoid I32 is deenergized, the lever falls to the position indicated in dotted lines in Figure 4 and in full lines in Figure 6. As shown in Figure 4 with the lever I38 in its lowermost position a release of the work W from the mandrels I08 permits the work to drop, engaging lever I38, and as the surface I39 thereof is inclined downwardly, the

work will roll to the left as viewed in Figure 4' thence on to the inclined ramp I44 formed at the rear portion of the frame I 0 to a conveyor or receptacle (not shown).

.A portion of the shaft 28 projects outwardly of journal bracket 23 and supports a sleeve I41 held to the shaft by means of a set screw I48, a pair of cams or switch actuating members I49 and. I49 being secured to the sleeve by means of screws as shown in Figure 9. The members I49 actuate switching means for circuit control hereinafter explained.

Fluid means under pressure are used for actuating the work supporting mandrels and the grooving dies or tools. This means includes the oil or hydraulic pump I6 connected by means of a tube I50 to a pressure relief or unloader valve I 5I. The unloader valve I5I. is connected by means of a pipe I53 to a solenoid actuated valve means I 54 for controlling the flow of fluid to and from the groover actuating cylinder 36. A pipe I 55 also connects the hydraulic fluid supply from valve I5I through a check valve I56 to a solenoid actuated valve means I51 for controlling the operation of the work supporting mandrels I08. The valve means I51 is connected to the fittings 98 at the outer ends of the cylinders 92 by means of pipe I58, counterbalance valve I60, pipes I59, HM and. I62 to direct fluid into the outer ends of the cylinders. The fittings 09 at the inner ends of cylinders 92 are connected to valve means I51 by means of pipes I65, I66, and I61. The pipes or connections I62 and I61 are made of flexible material to permit adjustment of the mandrel supporting mechanism for accommodation of different lengths of work.

The valve means I54 for controlling the grooving means carried by the sectors 44 is connected to the lower end of the cylinder 33 by means of a pipe I69 and a flexible connection I18. The upper end of cylinder 36 is connected to valve means I54 by pipe I12 and a flexible connection I33. A common return pipe I15 connects the valve means I54 and IE1 with the fluid reservoir I1.

The electrical circuits for the arrangement of our invention are illustrated in Figure 11. The motor I5 for driving the fluid pump I6 is connected to a source of electrical energy by means of a main line switch I30, a starting arrangement being illustrated diagrammatically at IBI. The service starting and stopping switches for manual control of the motor I5 are indicated at I82 and I33. A switch I84 is provided for initiating the cycle of operations as hereinafter explained. The solenoids I32 and solenoid mechanisms of fluid control valves I54 and I51 are supplied with electrical energy from a current supply line through a master switch I86. A switch I31 is arranged to be actuated by the stops or cams I49 and I43 carried by the sleeve 41 secured on shaft 28. Fluid pressure actuated switches I38 and I39 of the merco-id type are intercalated in the solenoid circuits of the valve means 554 for controlling the reciprocation of pisten 33 in cylinder 35.

The operation of the arrangement of our invention is as follows:

The motor I5 is first energized by closing switches I66 and i32, the motor continuing in op eration until de-energized by means of switch I33, or 530. The work supporting levers I36 are held in position illustrated in Figure 4 by enerization of solenoids I32 upon closing the switch I86, with switch I81 in closed position to complete a circuit through the solenoids. The operator places a cylindrical muffler shell or work W upon the levers I38 as shown in Figure 4: and manually closes the switch I184. This energizes .a solenoid in valve means I51 to establish fluid communication under pressure to the outer ends a engage the abutment rings I I4 and through the springs I26 the work is equalized between the head structures so that the grooves to be impressed in the work will be equidistant from the ends. When the pressure in cylinders 92 attains a predetermined value, viz., a pressure sufficient to actuate mercoid switch I38, the latter is actuated to complete the circuit to one of the solenoids of valve means M4 to establish a pressure fluid connection to the upper end of cylinder 36 above the piston 38 through the medium of pipes I 53, 1:12 and flexible connection I13. As the piston 3-8 is moved downwardly, it causes clockwise rotation-f shaft 28, sectors M and grooving dies or tools 53 .as viewed in Figure 2, bringing the arcuate projections 55 into rolling engagement with the cylindrical exterior surface of the work and adjacent the annular grooves no in mandrels M33. The dies 55 thus roll or impress a pair of grooves into the muliier shell or work W. The mufiler shell W is formed with a longitudinal seam I90 where the extremities of the sheet of material forming the cylinder are overlapped or joined, and as illustrated in Figure 4, the seam becomes an abutment, in eifect, for the beginning of each groove. The dies 55 do not form grooves or depressions through the seam, but the latter determines the start and completion of the groove, and correspondingly the movement of the sectors M. The pressure of the dies '55 against the work provides friction for rotating the work and mandrels as the latter are revolubly mounted on anti-friction bearings It'll and NH.

The initial rotation of shaft 2-8 in bringing the sectors 44 and dies 55 toward the work, rotates the sleeve I41 and, through the medium of the block I49 engaging the switch I81, the latter is moved to a neutral position as shown in Figure 11 to temporarily disconnect the circuit to the solenoids I32, permitting the Work supporting levers IS-B to move downwardly to the position indicated in dotted lines in Figure 4. Thus the levers I38 do not engage the work during the grooving operation.

When the sectors M have rotated an amount completing grooving of the shell W, the block I49 on sleeve I41 engages the switch I81, moving the switch arm in a direction to complet the circuit to a solenoid in the valve means I51 to withdraw the mandrels I03 from the work W. In attaining this result, the fluid under pressure is directed to the inner ends of the cylinders 92 through the medium of pipes I65, pipes I56 and I61, upon the inner sides of pistons 93, and as valve means I51 has disconnected fluid flow to the outer sides of the pistons $1 3, the latter move outwardly, withdrawing the mandrels IEIB from the work W. When the pistons 93 have moved to their extreme outermost positions, fluid pressure builds up in the line and acts upon the mercoid switch I89 to complete the circuit to the solenoid in valve means I54 to disconnect fluid pressure on the upper side of piston 38 in cylinder -36 and.

to divert the fluid flow to the opposite side of piston 38 and return the sectors M to their initial position.

When the mandrels IE3 are withdrawn from the work W, the latter is free to drop downwardly upon the levers I38 (now in position as shown in dotted lines in Figure 4) thence on to the inclined ramp I44 to discharge the grooved Work from .the machine: As shaft 28 is rotated to its initial position, the block or cam I49 on sleeve I41 engages the arm of switch I31 and closes the circuit to the solenoids I32 whereby the latter are energized to move the levers I38 into position to receive and support a piece of work to be grooved. The cycle of operations as above described is repeated as-each piece of work is placed in the machine.

The head I3 is pivotally supported by means of the pins 12 as a safety means in event the dies 55 over-ride a seam I93 of the work. Should this occur, the increased pressure set up on the head 13 causes the springs 14 to be'slightly compressed allowing the heads 13 to swing about the axis of pivot pins 12, and in this manner damage to the machine is avoided.

It should be noted that the positions of the heads 13 are rendered longitudinally and transversely adjustable with respect to the frame of the machine, the sectors 34 are adjustable, and the brackets I34 are vertically adjustable so as to render the machine readily adaptable for work of varying lengths and diameters. The dies 55 are removable, and dies of different configuration and lengths may be used, or dies in two or more juxtaposed sections may .be employed without departing from the spirit of the invention.

It is apparent that, within the scope of the invention, modifications and different arrangements may be made other than is herein disclosed, and the present disclosure is illustrative merely, the invention comprehending all variations thereof.

What we claim is:

1. In combination, means for impressing a .plur-ality of grooves in a cylindrical member including a frame; a pair of spaced mandrels mounted on said frame and adapted to support the cylindrical member; a plurality of die carrying sector-shaped elements journaled for oscillation adjacent the cylindrical member; dies mounted upon said elements and adapted for engagement with the exterior surface of the cylindrical member; means to oscillate said elements and dies whereby the latter engage and impress grooves throughout a portion circumferentially of the cylindrical member; and means for automatically withdrawing said mandrels from engagement with the cylindrical member after completion of grooving operations.

2. In combination, a machine of the character disclosed including a frame; a pair of spaced mandrels mounted on said frame; a pair of levers associated with the frame and adapted to initially receive and support the work; fluid means for moving said mandrels into engagement with the work for supporting the same during the performance of operations upon the work; and automatic means for controlling said levers .to render same ineffective to support the work when the mandrels ,are in Work supporting position.

.3. A machine of the character described, in combination, a frame, a pair of housings supported upon said frame; a mandrel rotatably and slidably mounted on each of said housings; fluid means for moving said mandrels into engagement with the work; yieldably supported abutments carried by said mandrels for centering the work in the machine; a pair of sectors mounted for oscillatory movement on said frame; a grooving die supported on each of said sectors; fluid actuated means for oscillating said sectors to bring said grooving die into engagement with the work, the friction of engagement with the work serving to rotate the work and supporting mandrels during grooving operations.

4. A machine of the character disclosed, in combination, a frame; a pair of heads adjustabiy supported on said frame; a mandrel slidably and rotatably supported by each of said heads; a yieldably mounted abutment associated with each of said mandrels adapted to center cylindricaliy shaped work supported on the mandrels; fiuid actuated means for moving said mandrels to work supporting position; electrically energized means for controlling flow of fluid to the fluid actuated means; a shaft; a plurality of sectors adjustable along said shaft; grooving dies mounted on said sectors; and fluid actuated means for moving said sectors to cause the dies to impress peripheral grooves in the cylindrically shaped work.

5. A machine of the character disclosed, in combination, a frame; a pair of levers associated with said frame for receiving and initially supporting cylindrically shaped work; means for operating said levers; a pair of heads supported on said frame; a mandrel slidably and rotatably supported by each of said heads; a yieldably mounted abutment associated with each of said mandrels adapted to center the cylindrically shaped work; means to move said mandrels into engagement with the work carried by said levers; control means for said mandrel actuating means; a shaft; bearings supporting said shaft; a plurality of sectors adjustably supported on said shaft; grooving tools carried by said sectors; means for rotating said shaft to move the tools into engagement with the work to impress peripheral grooves therein, said levers being moved out of work supporting position when said tools are in engagement with the work.

6. A machine of the character disclosed, in combination, a frame; a pair of solenoid controlled levers associated with said frame and adapted for receiving andinitially supporting a mufiler shell; a pair of heads adjustably supported on said frame, a mandrel slidably and rotatably carried by each of said heads; yieldably mounted abutment associated with each of said mandrels adapted to center the mufiler shell in the machine; fluid means for moving said mandrels into engagement with the shell carried by the levers; control means for said mandrel actuating means; a shaft supported on said frame; a pair of sectors adjustable along said shaft and rotatable therewith; grooving tools carried by said sectors; fluid means for rotating said shaft to move the tools into engagement with the muflier shell to impress a pair of peripheral grooves therein; means to move said levers out of work supporting position when the tools engage the shell while the latter is supported by the mandrels; said mandrel moving means being arranged to withdraw the mandrels from engagement with the muffier shell after completion of the grooving operation to discharge the grooved shell from the machine.

7. In combination, a frame; a pair of mandrels mounted on said frame; means for moving said mandrels longitudinally of said frame to engage a seamed hollow member; a die; a means for oscillating said die for impressing a partial peripheral groove in the unseamed portion of the hollow member; fluid means for actuatin said mandrels into and out of engagement with the hollow member; and electrically actuated mean for controlling the operation of said fluid means.

8. In combination a frame; a pair of spaced mandrels adapted to support a hollow member upon which the work is to be performed; a die; a sector-shaped element supporting said die; said sector-shaped element being supported whereby said die may be oscillated into rolling engagement with the hollow member to impress a groove therein; a pair of brackets pivoted upon said frame; each of said brackets supporting one of said mandrels; spring means for normally retaining said brackets in position whereby the mandrels support a hollow member during operative engagement of the die with the hollow member, said spring means being adapted to yield upon abnormal contact of said die with the hollow member causing relative movement of said brackets with respect to said frame.

9. In combination, a machine for imparting peripheral configurations in a hollow body including a frame; means for initially supporting the hollow body; a pair of spaced mandrels arranged to be moved into the ends of the hollow body and adapted to support the body during a work performing operation; a sector-shaped element; a die configuration associated with sectorshaped element; means to oscillate said sectorshaped element to move said die into rolling engagement with the hollow body whereby said engagement causes corresponding rotation of said body and impresses the configuration of the die into the body; said means adapted to be withdrawn from engagement with the hollow body after completion of the work performing operation; said initial body supporting means being arranged for movement to an angular position for automatically discharging the body from the machine.

10. A machine of the character disclosed, in combination, a, frame; a, pair of relatively movable mandrels carried by said frame and adapted to support a tubular member; electrically controlled fluid actuated means for moving said mandrels into and out of engagement with the tubular member; a plurality of sector-shaped arms journaled for oscillatory movement relative to said mandrels; a grooving die associated with each of said arms and adapted for engagement with the tubular member to impress a groove therein throughout a, portion circumferentially of the tubular member; and fluid actuated means for oscillating said die into and out of engagement with the tubular member.

11. A machine of the character disclosed, in combination, a frame; a pair of longitudinally movable mandrels carried by said frame and adapted to enter and support the ends of a tubular member; electrically controlled fluid actuated means for moving said mandrels; a pair of sectorshaped arms journaled upon said frame; a grooving die associated with each of said arms; hydraulically actuated means for moving said arms whereby said dies are brought into engagement with the tubular member; electrically actuated means dependent for operation upon the fluid pressure acting on said mandrels when the same are in engagement with the tubular member for directing fluid under pressure to said hydraulic means to move said oliesinto engagement with the tubular memberito impress circumferential rooves th rein.

n. m, inat on .-a achi e forfor i g c on.v fieurati ns in. the. Wal s fv hollow members inlu in a frame; a pair of, supp ts mova l mounted upon the frame; each of said supports being arranged to telescope into an end oi a t bular member; an abutment disposed adjacent each support; yieldable means interposed between each abutment and itsrespeetive s pport; Said abutm ntsbe ns arran ed to. yiel in ly en the ends of. the tubular member when said supports are in te scopic. en a ment. with. said tubularmember; a die; means for actuating the die into, en a ement with the. tubularrmember, and mpre simrw a configuration therein saidyieldable. means oo era ing with said abutments forproperly. positioning, the tubular. memberwith, respect t it eidie.

L3,.A machine of the character. disclosed, in combination, a frame," a pairnof spaced. mandrels mounted; upon saidirame; said. mandr'els. being journaled, for. rotary. movement; said mandrels being arranged for longitudinal/movement with espect. to. the frame tOHbIiIlgA said mandrels into telescopic relation with the. Work; yieldably mountedabutments disposed. adjacentisaid. man.- drels iore centeringithe, work in, the machine; a plurality of, sector-shaped elements supported upon, the frame; grooving. tools. carried by said eet reshaped elements; and means to. oscillate said .sectorrshapedelements to move said tools into. engagementwith theworlefor simultaneouslyirnpressingja, plurality ,of grooves. in the Work.

, for oscillating said elements tomoye said diesinto.

engagement with the work when said mandrels are in work, engaging and supporting positions, and means renderedjeffective. when saidmane drels are in work-supporting position for moving said levers out of, engagement with. the. work whereby the latter is supported. solely by the man-. 'drels during grooving operations.

ARTHURJ; BARBIE.

RAYMOND J DWYER.

REEERENCES CITED The following references are of record in the file or this patent:

UNIFIED STATEfi PATENTS