US3774282A

US3774282A - Apparatus for assemblying idler rolls and the like

Info

Publication number: US3774282A
Application number: US00286036A
Authority: US
Inventors: H Hooper
Original assignee: Continental Conveyor and Equipment Co Inc
Current assignee: Continental Conveyor and Equipment Co Inc
Priority date: 1972-09-05
Filing date: 1972-09-05
Publication date: 1973-11-27
Anticipated expiration: 1990-11-27

Abstract

A machine for assemblying and heading idler rolls and the like, which rolls embody a tubular shell, a head in each end of the shell and preferably, a centrally disposed grease tube connected at each end to centrally disposed openings on the inner sides of the heads. The apparatus embodies means to place a grease tube in the outer shell, means to position the heads adjacent the ends of the shell, mandrels which enter the shell from both ends, passing through the heads and entering the grease tube to center the heads and tube relative to the shell, and means to press the parts together. At another work station the ends of the shell are rolled or formed over, thus to secure the parts together. The machine is adjustable to fabricate rolls of different lengths.

Description

United States Patent [191 Hooper APPARATUS FOR ASSEMBLYING IDLER ROLLS AND THE LIKE Homer Hooper, Winfield, Ala.

[73] Assignee: Continental Conveyor andEouip-j we! Q mran Winfi.ld .la- ,-.a

22 Filed: Sept. 5, 1972 211 App]. No.: 286,036

Inventor:

[56] References Cited UNITED STATES PATENTS 2,655,718 10/1953 Haegele 29/201 Nov. 27, 1973 Primary Examiner-Thomas H. Eager Attorney-Hugh P. Carter et al.

[5 7] ABSTRACT A machine for assemblying and heading idler rolls and the like, which rolls embody a tubular shell, a head in each end of the shell and preferably, a centrally disposed grease tube connected at each end to centrally disposed openings on the inner sides of the heads. The apparatus embodies means to place a grease tube in the outer shell, means to position the heads adjacent the ends of the shell, mandrels which enter the shell from both ends, passing through the heads and entering the grease tube to center the heads and tube relative to the shell, and means to press the parts together. At another work station the ends of the shell are rolled or formed over, thus to secure the parts together. The machine is adjustable to fabricate rolls of differentv lengths.

9 Claims, 20 Drawing Figures Patented Nov. 27, 1973 3,774,282

4 Sheets-Sheet 1 Patented Nov. 27, 1973 4 Sheets-Sheet 2 Patented Nov. 27, 1973 4 Sheets-Sheet 3 Patented Nov. 27, 1973 3,774,282

4 Sheets-Sheet 4 E I? E15 15 V [Ill/[j] I I I I I I I I I I I Y/ YI/l/ l// [A TEMPE/T14) I I! /'//r/ /I/ //////J APPARATUS FOR ASSEMBLYING IDLER ROLLS AND THE LIKE My invention relates to apparatus for assemblying idler rolls and the like of the kind having an outer tubular shell, heads in the ends of the shell, and, in some cases, a longitudinally extending grease tube connected fluid tight to centrally disposed bores in the heads.

One object of my invention is to provide an idler roll assemblying and heading apparatus in which, at one work station, a grease tube is inserted loosely into a horizontally disposed roll shell, and upon transfer to subsequent work stations the grease tube is brought into axial alignment with the shell, the heads are then pressed into the ends of the shell and connected to the ends of the tube, and at another station the ends of the shell are rolled over or formed about the peripheries of the heads, thus to secure the parts together.

Another object is to provide apparatus of the character designated which is capable of fabricating rolls of different lengths, this preferably being accomplished by mounting one side of the machine for movement relative to the other.

Another object is to provide apparatus of the character designated in which the work pieces are transferred from work station to work station by means of a walking beam type mechanism capable of accurately positioning the work pieces in proper relation to the respective devices which are to operate thereon.

Generally described, my invention contemplates apparatus which embodies essentially three work stations. At the first station a blank roll shell has inserted thereinto, to lie eccentrically therein, a grease tube long enough for its ends to be press fitted into the inner concentric bores of a pair of heads or hubs. The thus assembled roll shell and tube are then moved to the second work station. Means here is provided to position the roll heads in generally axial alignment with the shell. Mandrels having sections of suitable diameter now move into the centrally disposed bores of the heads, pushing them into-the ends of the shell. At :the same time, the inner, reduced ends of the mandrels having entered the ends of the grease tube,.bring the grease tube concentric with the shell and bores of the heads, so that concomitantly with the inward pressing of the heads into the ends of the shell the ends of the tube are inserted into the appropriate bores therefor on the inner, centrally located portions of the heads. The thus assembled parts are now moved to the third work station at which the ends of the shell are rolled over thus to secure the heads in place. The completed roll may then be moved to a discharge station. Also, as each work station is vacated an on-coming workpiece from the preceding station is placed thereon, whereby a continuing flow of workpieces is presented to the stations where the several operations take place, increasing the production rate of the apparatus.

Apparatus illustrating features of my invention is shown in the accompanying drawings, in which:

FIG. 1 is a side elevational view, partly in section and with parts broken away;

FIG. 2 is an end elevational view with parts partly broken away and in section and looking at the machine along lines 2-2 of FIG. 1;

FIG. 3 is a diagrammatic end elevational view, partly broken away, and illustrating the function of the mandrels in assemblying the heads into a shell at the second station;

FIG. 4 is a detail fragmental sectional view taken generally along line 4-4 of FIG. 3.

FIG. 5 is a view taken generally along line 5-5 of FIG. 4, certain of the parts being broken away and in section, and showing the mandrels entering the grease tube, preparatory to being centered relative to the shell of the rolls;

FIG. 5a is a fragmental view partly in section illustrating the configuration of the ends of the grease tube and spring detent members adjacent the ends of mandrels;

FIG. 6 is a detailed view, partly broken away. and in section, and showing the position of the parts after the grease tube and heads have been brought into concentric relationship relative to the shell;

FIG. 7 is a detail fragmental view taken generally along line 77 of FIG. 6;

FIG. 8 is a fragmental detail view, partly in section, showing the position of the parts after the mandrels have pressed the heads into the ends of the shell and have pressed the .grease tube into the openings therefor in the heads;

FIG. 9 is a detail view taken generally along line 9-9 of FIG. 8;

FIG. 10 is a plan view, partly broken away, and showing some of the details of the pusher mechanism for inserting the grease tube into a roll shell, at the first station;

FIG. 11 is a detail sectional view taken generally along line 11-11 of FIG. 10;

FIG. 12 is a detail view taken generally along line 12-12 of FIG. 11;

FIG. 13 is a fragmental detail side elevational view illustrating mechanism for feeding the heads, one at a time, in position to start the assembly process;

FIG. 14 is a detail sectional view taken generally along line 14-14 of FIG. 13;

FIG. 15 is a vertical detail sectional view through the apparatus showing the station where the ends of the shell are rolled or formed over the inserted heads, the view illustrating a headed shell in position ready to be rolled over;

FIG. 16 is a view corresponding generally to FIG. 15 and showing the heading mechanisms in contact with the ends of the shell, preparatory to rolling or forming over the ends of the shell;

FIG. 17 is a detail sectional view taken generally along line 17 of FIG. 16;

FIG. 18 is a detail sectional view through one of the heads in assembled position relative to the shell and grease tube, the assembly mandrel still being in place; and,

FIG. 19 is a detail fragmental sectional view illustrating the relation of the outer side of the head with the rolled over end of the shell, in a completed assembly.

Referring now to the drawings for a better understanding of my invention and particularly to FIGS. 1 and 2 it will be seen that the machine comprises a base or frame supporting section indicated generally at 10. As stated before, the object is to feed to the machine, automatically or by hand, a plurality of roll shells indicated at 11, to insert therein a grease tube indicated at 12.and to place in each end of the shell, concentrically centered relative thereto and to the grease tube, a pair of the heads or hubs indicated at 13. Thus, and broadly stated, upon the frame 10 the mechanisms for receiving the parts just stated and for assembly-ing and finally forming over the head to hold them assembled are mounted and secured.

More in detail and viewing FIG. 2, it will be seen that the righthand side of the machine as viewed in that figure may be fixedly secured to the frame or rails 10. The lefthand side of the machine as viewed in FIG. 2 may be movably supported on the rails for movement away from the righthand section of the machine, thus to accommodate shells 11 of different lengths, permitting the assembly or idler rolls and the like of varying lengths. The lefthand side of the machine may be secured in adjusted position to the rails 10 by means of fasteners, bolts, set screws or the like indicated at 14.

Mounted on the righthand section 16 of the machine, and facing the lefthand section 17 thereof, as viewed in FIG. 2, is a fixed workpiece supporting rail 18. The rail 18 has notches or seats therein to receive the roll shell as it is placed thereon, at the first station, namely, the station numbered A in FIG. 1 of the drawings. In similar manner the shiftable section 17 of the machine has a fixed rail 19 having aligned, corresponding seats to receive the roll shell at the station indicated at A.

The

rails

18 and 19 are provided at the stations indicated at B, C and D in FIG. 1 with similar, aligned arcu ate seats to accommodate the shells 11 at the various stations when placed thereon as will be explained. It may also be added that for shells of different or varying diameters the radii of these seats or cutouts may be varied by the use of inserts. The

machine sections

16 and 17 are provided with vertically and horizontally reciprocating

transfer rails

21 and 22 together with means to operate these in unison in the sense that they both move down at the same time and reciprocate at the same time. Thus, there is provided a hydraulic cylinder 23 having a piston rod 24. The piston rod 24 is fastened through a member 26 to a rack bar 27. The rack bar is supported for reciprocation in

gear boxes

28 and 29. In each of the gear boxes are

gears

31 and 32 in mesh with the teeth on the top of the bar 27. Also in mesh with the

gears

31 and 32 are vertically disposed rack bars 33 and 34. The rail 21 is thus supported at the upper ends of the rack bars 33 and 34 and it will be apparent that when the piston rod 24 of hydraulic cylinder 23 reciprocates therein bars 33 and 34 and hence the rail 21 is raised and lowered.

The cylinder 23, the

gear boxes

28 and 29 all are supported on a reciprocable bar-like member 37. The member 37 is supported for movement relative to the base of the machine section 16 on grooved

rollers

38 and 39.

Mounted on the side of the lower portion of the base of section 16 of the machine is another hydraulic cylinder 41. The piston rod 42 of the cylinder 41 is connected by means of a member 43 to the reciprocable bar-like member 37. Therefore, when fluid is admitted under pressure to either end of the cylinder 41 the piston rod 42 moves correspondingly, thus shifting the member 37 together with the rack bars 33 and 34 and hence the rail 21 to the right or left as viewed in FIG. 1.

The lefthand side 17 of the machine is provided with the identical cylinders 23 and 41, the reciprocable member 37, the

gear boxes

28 and 29, rack bars 33 and 34. The cylinders 23 and 41 in both instances are double acting and control means, not shown, are provided for operating the two cylinders 23 and 41 in unison.

Therefore, the

movable rails

21 and 22 move up and down together and reciprocate together, in order to transfer the workpieces, namely the shells, from stations A to station B to station C to station D. The assembly just described in effect becomes a walking beam type of transfer mechanism for the workpieces.

Starting again at station A of the apparatus which, as will be understood, is intended to cover the place where the shells 11 first enter the machine it will be seen that the operation there carried out is to physically place the grease tube 12 inside the shell 11. Therefore, the shells 11 are supported on spaced apart rails 44 so that, when viewed in FIG. 1, the

movable rails

21 and 22, when in lowered position, move to the left under the influence of cylinder 41, raising upwardly under the shell 11 resting at the lowermost end of the rails 44. In other words, the

movable rails

21 and 22 move from the position of FIG. 1 to the left, positioning the notches therein at station A under the lowermost one of the row of shells 11, move it upwardly and then back to the position shown in FIG. 1. In this position a shell 11 is now in position at stationA and the

rails

21 and 22 are raised above the level of the

rails

18 and 19 so that the workpiece is supported in elevated position relative to the latter rails.

Mounted at one end of the shell while occupying station A is a V-shaped trough member 46. See FIGS. 10, 11 and 12. This member is located at the lower end of a supporting member 47 on which is maintained a row of the grease tubes 12. The bottom of the trough 46 is in direct alignment, axially, with a shell 11 while is occupies station A. The lowermost one of the row of tubes 12 comes to rest against one edge of the trough 46. A solenoid 48 having its armature connected to a finger 49 pivoted at 51 is adapted, when energized, to throw the tubes individually from the position shown in FIG. 12 into the trough 46. Stated differently, as soon as the

movable rails

21 and 22 position a shell 11 at station A the solenoid 48 is energized, thus placing a grease tube in the trough or supporting member 46.

Mounted at the end of the trough opposite station A is a cylinder 52 having a piston rod 53. A pusher member 54 is mounted on the end of the rod and slides in to V-shaped trough 46. Through automatic controls not illustrated, as soon as the shell 11 is in position on station A and as soon as the tube 12 is thrown over into the supporting member 46, cylinder 52 is energized thus to insert the grease tube into the shell 11 by simply pushing it thereinto. It will be noted that initially the tube 12 rests in the bottom of the inside of the shell 11 as shown in various of the figures, for instance, FIGS. 3 and 4.

As so far described the apparatus is now in position with a shell 11 at station A, a tube 12 having been inserted thereinto while the shell was resting in the notches of the fixed

rails

18 and 19. However, in FIG.

1 I have shown

movable rails

21 and 22, in raised position, ready to be shifted to the right, thus to move the thus assembled shell-grease tube from station A to station B.

Starting with the parts in the position of FIG. 1, the next operation in the cycle is to move the assembled shell and tube occupying station A to station B and to get a new shell from the supply rack 44 and to place it on station A. To accomplish this the first operation is to lower the rack bars 34 by actuating cylinders 23. As soon as the rails 21- are lowered the assembled shell and tube will be resting on the notches in the

stationary rails

18 and 19 at station A. The next motion is to energize I the cylinders 41 in unison so that their piston rods move to the left as viewed in FIG. 1, bringing the notches or seats in the

rails

21 and 22 into position immediately below the lowermost one of the shells on the rack or supply mechanism. When thus positioned cylinders 23 are energized to again raise the

rails

19 and 21. This causes a new shell 11 to occupy the notches in the

rails

19 and 21, at the lefthandmost side of FIG. 1 and at the same time for the notches in the rails at station B to engage the assembled shell and grease tube occupying station A. Reverse energization of the cylinders 41 causes the parts to move back to the position of FIG. 1 transferring the assembled shell-grease tube to station B.

In axial alignment with the shell 1 1 occupying station B are

hydraulic cylinders

61 and 62. These cylinders actuate

mandrels

63 and 64 which are secured to the respective piston rods carried by the

cylinders

61 and 62. As illustrated in various figures of the drawings the mandrels themselves are provided with reduced ends 66 and 67 which are adapted, as willbe explained, to enter into the ends of the grease tubes 11. The mandrels further are provided with sections 68 and 69 which are adapted to enter into the openings of the heads 13, for the purpose of centering the heads relative to the shells ll.

Pusher sections

63a and 64a are adapted to force the heads into the shell.

As detailed in FIG. 50, adjacent the end of each mandrel section 66 and 67 I provide a spring biased ball type detent 70. The balls 70a engage the ends of the grease tube upon inward movement of the mandrels, assuring that thetube is longitudinally centered in the shell. Further, the ends of the tubes are slightly informed as at 12a so that when the reduced ends of the mandrels enter the tube ends, the tube is correctly centered relative to the shell.

The heads 13 are fed to station B by confining them in downwardly sloping trough-like holders 65, one located at each end of the shell 1 1 which occupies station B. Asbest shown in FIG. 13 the troughs 65 are provided at their lower ends with escapement mechanisms to permit the heads to roll, one at a time, from the ends of the troughs or holders to a position into axial alignment with the mandrels. Thus, the escapement mechanism may comprise a plate 71 pivoted at 72. The plate carries a pair of outstanding pins 73 and 74. A spring 76 pivots the plate to a position for pin 73 to engage a portion of the lowermost one of the row of heads 13. However, upon actuating the plate 71 by pivoting it about its pivot point 72 the pin 73 withdraws from holding position, permitting the heads to roll to the position shown in FIG. 13, in axial alignment with the mandrels. When plate 71 is rocked clockwise as shown in FIG. 13, pin 74 acts as a temporary holder for the entire row of gravity fed heads, permitting only one at a time to move from the lowermost end of the row to the position in alignment with the mandrels. When the plate returns again to the position of FIG. 13 one of the heads has escaped and has rolled downwardly to be stopped in position against pins or the like 75. The plates 71 are actuated in unison by any suitable form of mechanism'as for instance by. cams actuated by the

cylinders

61 and 62.

Supported on'upper frame sections 81 and 82 of the machine are vertically arranged

hydraulic cylinders

83 and 84. The piston rods of these cylinders carry hold down clamps 86 and 87 which, prior to the insertion of the heads as just explained are lowered, thus to hold the shell firmly in place while the heading operation is being carried out. Obviously, prior to transferring the workpieces from station to station, theclarnps are released.

Recalling now that there is one of the troughs 65 at each end of the shell 11 at station B and that the

movable rails

21 and 22 are in raised position, actuation of the

cylinders

61 and 62 moves their

respective mandrels

63 and 64 toward each other. As shown in FIG. 3, the first action is for the mandrels to pass through the central openings in the heads 13 which occupy aligned positions relative thereto. Continued motion inwardly toward each other places the reduced ends 66 and 67 of the mandrels in the ends of the grease tube 12, as shown in FIGS. 5 and 5a. The inwardly movement of the mandrels is momentarily stopped whereupon the

movable rails

18 and 19 are lowered through the medium of the cylinders 23, whereby the parts assume the position shown in FIG. 6 of the drawings. This places the grease tube and both'of the heads in axial, concentric alignment relative to the shell 11. The

cylinders

61 and 62 are now again energized whereupon the parts move from the position of FIG. 6 to the position of FIG. 8, that is with the heads completely inserted in the shell and with the grease tube ends engaging the tapered central, inner openings 13a of the heads 13. The

cylinders

61 and 62 are now reversely actuated withdrawing the mandrels. The machine is now ready for another feeding and transfer operation, namely, ready for the movable rails to be moved downwardly, thence to the left as viewed in FIG. 1, upwardly, and thence to the right as viewed in FIG. 1. i

The next operation is to form the ends of the shell over the peripheries of the heads from the position shown in FIG. 18 to the position shown in FIG. 19. To this end the assembled parts are brought to station C. The

movable rails

21 and 22 are lowered thus to cause the shell to rest on the stationary rails 18 and 19m station C.

Hydraulic cylinders

91 and 92 carry hold down

clamp sections

93 and 94 in order to clamp the shell stationary at station C.

As shown particularly in FIGS. 15 and 16, at station C are shell end forming devices indicated generally by the

numerals

96 and 97. Each of these comprises a rotating disc 98 carrying spaced forming rolls 99. In addition, the plates 98 are supported on the pistons of hydraulic cylinders, not shown, forming'a part of the

mechanisms

96 and 97 so that the rolle 99 may be moved from the position of FIG. 15 to the position of FIG. 16. That is to say, with the assembled parts clamped at station C as shown in FIGS. 15 and 16, the forming mechanisms including the plates or discs 98 move inwardly from the position shown in FIG. 15 to the position shown in FIG. 16 to engage the ends of the shell. The plates and hence the rollers are now rotated,

rolling the end sections 11a overhanging the outer surfaces of the heads 13 from the position shown in FIG. 18 to the positions shown in FIG. 19, thus completing the assembly of the heads, grease tubes and shell. As before indicated with respect to the seats or notches in the rails, the relative positions of the rollers 99 On the plates'98 may be adjusted thus to accommodate shells of varying diameters.

The movable rails are now actuated again, thus picking up a new shell 11 from the rack 44 and moving the thus completed, rolled over and finished assembly to station D where it may be removed manually or by automatic machinery as desired.

My invention is characterized by its simplicity of construction and accuracy and speed of operation. I have not shown the various controls for operating and coordinating the parts of the apparatus because the construction and nature of these will be evident to those skilled in the art. Further, while I have laid particular stress on assemblying rolls having the centrally disposed grease tube, it will be apparent that my apparatus is useful in assemblying only the heads.

While I have shown my invention in but one form, it will be obvious to those skilled in the art that it is not so limited, but is susceptible of various other changes and modifications without departing from the spirit thereof.

What I claim is:

1. In apparatus for assemblying heads and grease tubes into a roll shell,

a. a first work station embodying means to place a grease tube in a substantially horizontally disposed roll shell with the grease tube lying eccentrically in the roll shell,

b. means to move the thus related grease tube and roll shell from said first station to a second station,

c. mandrels located at said second station and having grease tube and roll head sections, disposed, when the mandrels move inwardly toward each other, to pass through centrally disposed openings in the roll heads and to project into the ends of the grease tube,

d. means to move the mandrels inwardly first passing the grease tube sections through a pair of said heads and then inserting the grease tube sections into the ends of the grease tube,

e. means to bring the grease tube and roll shell into concentric relation with each other, and

f. means to move the mandrel further toward each other, whereby the heads are pressed into the ends of the roll shell and the ends of the grease tube are pressed into openings located adjacent the centers of the heads.

2. Apparatus as defined in claim 1 which includes a third work station, means to move the assembled roll shell, heads, and grease tube onto the third station, and means at said third station to roll the ends of the roll shell over the peripheries of the heads, thereby to secure the heads in the roll shell.

3. Apparatus as defined in claim 1 in which there is means mounting one of said mandrels and its operating instrumentalities for movement away from the other thereof, thereby permitting the apparatus to operate upon roll shells of different lengths.

4. Apparatus for assemblying bored heads and a grease tube into a roll shell,

a. a first work station on which the roll shell is placed in a substantially horizontal position,

b. means to place a grease tube inside the shell while at said first station to lie eccentrically therein,

c. a second work station to which the roll shell carrying the grease tube is transferred,

(1. mandrels at said second station having inner reduced ends disposed to enter the ends of the grease tube and other sections adapted snugly to fit into the bores of the heads,

e. means at the second station to position a head adjacent each end of the tube for passage therethrough of said reduced ends of the mandrels and for engagement by said other sections of the mandrels within the bores of the heads,

f. means to move the mandrels into and out of the shell, whereby upon inward movement the heads are pushed into the ends of the shell and the grease tube is connected concentrically with the heads,

g. a third work station at which there are means to form over the ends of the shell, whereby to secure the heads in the shell, and

h. transfer means for the shells common to all of said stations, whereby as a shell is transferred from said first station to said second station a shell is concomitantly transferred from said second to said third station, etc.

5. Apparatus as defined in claim 4 in which said common transfer means comprises a pair of rails which extend under said work stations, means to raise said rails in unison, to lower the same in unison, and to shift the same longitudinally in unison, whereby, the work pieces on said various stations are transferred from one station to the other by the walking beam motion of said rails.

6. Apparatus as defined in claim 4 in which at each of said stations there are stationary means for supporting the roll shells, and in which at said second and third stations there are hold down means for engaging the rolls while being operated upon.

7. Apparatus as defined in claim 4 in which there are means located at the ends of the grease tube on said second station to position said bored heads, one at a time, for the passage of said mandrels therethrough.

8. For use in apparatus of the character described, a mandrel having an inner, reduced end of a size adapted to enter a grease tube to be assembled with heads and a roll shell, and a spring biased detent on said mandrel adapted, when the end of the mandrel is inserted into a grease tube, to engage the end of the tube and to push the tube toward a like mandrel simultaneously engaging the opposite end of the tube, whereby, when engaged between two such mandrels so equipped with said detents, the tube is centered prior to fully entry of either mandrel into its respective end of the grease tube.

9. In apparatus for assemblying centrally bored heads into a roll shell, 7

a. a work station on which the shell is placed in substantially horizontal position,

b. means to position one of said heads at each end of the shell with the bores thereof generally aligned with the longitudinal axis of the shell,

0. a mandrel at each end of the shell with the ends thereof disposed to pass into the bores of the heads and to press them into the ends of the shell,

d. another work station for receiving the assembled shell and heads, and

e. means at said last named work station efi'ective simultaneously to form over the ends of the shell about the peripheries of said heads, thereby to secure the heads in place.

Claims

1. In apparatus for assemblying heads and grease tubes into a roll shell, a. a first work station embodying means to place a grease tube in a substantially horizontally disposed roll shell with the grease tube lying eccentrically in the roll shell, b. means to move the thus related grease tube and roll shell from said first station to a second station, c. mandrels located at said second station and having grease tube and roll head sections, disposed, when the mandrels move inwardly toward each other, to pass through centrally disposed openings in the roll heads and to project into the ends of the grease tube, d. means to move the mandrels inwardly first passing the grease tube sections through a pair of said heads and then inserting the grease tube sections into the ends of the grease tube, e. means to bring the grease tube and roll shell into concentric relation with each other, and f. means to move the mandrel further toward each other, whereby the heads are pressed into the ends of the roll shell and the ends of the grease tube are pressed into openings located adjacent thE centers of the heads.

4. Apparatus for assemblying bored heads and a grease tube into a roll shell, a. a first work station on which the roll shell is placed in a substantially horizontal position, b. means to place a grease tube inside the shell while at said first station to lie eccentrically therein, c. a second work station to which the roll shell carrying the grease tube is transferred, d. mandrels at said second station having inner reduced ends disposed to enter the ends of the grease tube and other sections adapted snugly to fit into the bores of the heads, e. means at the second station to position a head adjacent each end of the tube for passage therethrough of said reduced ends of the mandrels and for engagement by said other sections of the mandrels within the bores of the heads, f. means to move the mandrels into and out of the shell, whereby upon inward movement the heads are pushed into the ends of the shell and the grease tube is connected concentrically with the heads, g. a third work station at which there are means to form over the ends of the shell, whereby to secure the heads in the shell, and h. transfer means for the shells common to all of said stations, whereby as a shell is transferred from said first station to said second station a shell is concomitantly transferred from said second to said third station, etc.

9. In apparatus for assemblying centrally bored heads into a roll shell, a. a work station on which the shell is placed in substantially horizontal position, b. means to position one of said heads at each end of the shell with the bores thereof generally aligned with the longitudinal axis of the shell, c. a mandrel at each end of the shell with the ends thereof disposed to pass into the bores of the heads and to press them into the ends of the shell, d. another work station for receiving the assembled shell and heads, and e. means at said last named work station effective simultaneOusly to form over the ends of the shell about the peripheries of said heads, thereby to secure the heads in place.