US1938939A - Means for splitting objects - Google Patents

Description

Dec. 12, 1933. F H. SMITH 1,938,939

MEANS FOR SPLITTING OBJECTS Filed July 11, 1952 2 sh t s 1 a"! 1: d 64 77 7a F .5. nvmsuvroze By 4% //M s ATTORNEY therein a rotary magazine plate 8.

Patented Dec. 12, 1933 UNITED STATES PATENT ori ice 1,938,939 MEANS FOR SPLITTING OBJECTS Frederick H. Smith, Dayton, Ohio Application July 11, 1932. Serial No. 622,008

" 1 Claim. (c1. 29-70) My invention relates to new and useful improvements in milling machines that are particularly adapted for splitting bushings, sleeves and like cylindrical articles.

.It is the principal object of my invention to provide a rapid and accurate means to split bushings, sleeves and the like. 7

It is another object of my invention to provide automatic means to feed the articles to be split to the cutters and rigidly clamp them, dur'- ing the splitting operation.

It is still another object of my invention to provide a simple and positive indexing means for a magazine plate by which the work is placed under the cutters. V e e .It is thepresent practice in the manufacture of split bushings, particularly as employed with poppet valve spring retainers, to ,mill or split these bushings on a hand mill, that is, one where the work is placed, andfed into the mill, by'hand.

This process is slow and costly. With my device the bushings or sleeves tobe split are fed from a magazine by gravity to a magazine plate whence they areintroduced to the dual cutters and afterwards discharged from the magazine plate to a proper receptacle, accurately split, meeting the exacting demands of production practice.

Other important and incidental objects of my invention will be set forth in the following specification and the claims annexedthereto.

In the accompanying drawings illustrating one embodiment of my invention, Figure 1 is a top view of my machine. Figure 2 is a sectional view through the machine, taken on the, line 2-2 of Figure 1. Figure3 is a sectional plan view taken on the line 3 3 of Figure 2. Figure4 is a front view of my machine.

Figure 5 is an enlarged detailed view of the' thereof, is a flat steel bed plate 5, secured to the former -by screws 6. This plate 5 is provided with a large circular opening 7 to receive snugly (See Figure 1).

This plate 8 is secured to the upper end of a vertical shaft 9 journalled in a bearing 10 secured to the underside of the top 2. Below the bearing 10 there is keyed to the shaft 9 a serrated lock disc 11 and an index disc 12, joined by a common hub 13.

The plate 8 has positioned about its periphery,- and in pairs, holes 14 that receive therein the bushings or collarsto be split. The axis of these holes are parallel to the axis of the shaft 9. EX- tending inwardly from the periphery of the plate, and intersecting'the holes 14, areslots l5 arranged in parallelism for each respective pair of holes.

, Below the plate 8, the lock disc 11 has in its periphery notches or serrations 16 in radial alinement with acenter line of the pair of holes in the former. are radial index pins 17, likewise in radial alinement'with each of the notches 16.

Co-acting with the lock disc 11 is a lock bar 18, extending transversely under the top 2 and pivotally secured to the frame 1. 7

When the bar 18 contacts the disc 11, the former is provided with a key 19 that enters a'registering serration 16. Beyond the disc 11 the lock bar is pivotally attached to a plunger 20, extending forwardly through the frame 1. Surrounding'the plunger 20, and between the frame 1 and a collar 21 pinned to the former, is a compression spring 22, to hold the lock bar yieldably in contact with the lock disc.

At its outer end, the bar 18 is engaged by adepending release lever 23, pivotallysecured to the machine frame 1 and extending transversely below the shaft 9. (See Figures 2, 3 and 4) Keyed to the shaft26, below the plunger 20, is an index finger 28 comprising a hub 29 having an adjustable radial finger 30 that co-acts with a the index pins 17 to rotate the latter when the shaft 26 is rotated. (See Figures 3 and 4).

Secured to. the shaft 26 below the shaft 9 is a cam 31 co-operating with a cam roller 32, rotatable about a pin 33 secured to a cross-bar 34 extending lengthwise of the machine below the shaft 26. Secured in the ends of the latter are vertical actuator rods 35, 35 that project upwardly. throughdependingguide bushings 36, 36, on the under side of the top 2, to a clamp plate 37. i 1

This plate 37 is rectangular in shape, extending lengthwise of the machine above the plates 5 and 8. At each corner of theformer, and depending therefrom into apertures in the bed plate 5; are pins 38, each surrounded by a helical compression spring 39 received by the apertures in the plate 5 toraise the plate 37 above the magazine 8 when released by the cam 31. and 2) The shaft 26 has keyed thereto, adjacent one Also in the index plate 12 there .(See Figures 1.

of its bearings 2'7, 9. gear 40, meshing with an idler gear 41 pivoted on an idler stud 42 mounted on the frame 1. This idler 41 meshes with an? other gear 43, of the'same diameter as the gear 40 and keyed to a transverse drive shaft 44 in the rear of the machine, parallel to the shaft 26, and journalled in bearings 45, 45 attached to the machine frame 1. (See Figures 2 and 3) To the end of the shaft 44 opposite the gear 43, and outside of the frame 1, there is attached a worm gear 46. The latter is rotated by a worm 47 positioned above it and keyed to a shaft 48, at right angles to the shaft 44, and journalled in bearings 49, 49 integral with the frame 1.

To the rearwardly. extending end of this shaft 48 is a cross drive pulley 50 and a main drive pulley 51. On .the opposite side of the machine 1 is another .pulley 52in alinement with the pulley 50from which it is driven by a belt 53. This pulley 52 is keyed to a shaft 54,.journalled in bearings 55, 55 integral with the frame 1 and has secured to itsfront end a bevel gear 56.

Mating with the gear 56 is another bevel gear, 5'7 keyed to the end of a shaft 58 at right angles to the shaft 54. (See Figures 1 and 4).

The shaft 58 projects across the machine'above the top 2 where it is journalled in a long center bear 59 and a shorter outer bearing 60 adjacent the gear 5'7, both secured to the top 2 behind the plate 5.

Surrounding the through the bearing 59, is a sleeve 61 upon whose projecting ends there isfreely mounted at its center a U shaped arbor shaft mounting frame 62 that straddles the bearing 59.

Adjacent'each side of the frame 62 is agear 63 keyed to the shaft 54 by which they are rotated. These gears mesh with smaller gears64 keyed to the outer ends of an arbor shaft65 journalled in the outer open ends of the frame. 62'

through which it extends. Mounted upon the arbor shaft 65, between the ends of the frame and spaced by collars 66, are two circular saws orslitters 6'7 secured by a spanner nut 68.

Below the saws 67, the plate 3'7 is provided with clearance slots 69 for the former, and in order 1 to securelyhold the work in the magazine plate 8, I have providedon the under side of the plate 3'7, and in alinement with the pair of holes 1.4

below the saws 6'7, fingers '70 as shown at Figure 5.

These fingers are formed of shouldered blISh'. ings '71 received by holes '72 in the plate 37 in which they are brazed with the reduced diameter of the bushings extending below theface of the plate into the holes 14 to bear' on the top of the work within the latter.

After being brazed in the plate 3'7, these bushings are cut in two parts by a' slot, like the slots 69'to form the fingers'lo.

Now, as the work is brought into position be-.

low the saws the latter are lowered to cut through theformer, by the rotation of the frame 62 about the sleeve 61 and actuated by a cam rod '73 pinned to the rear end of'the frame. This rod extends downwardly'through. a guide bushing '74 in the top 2, and has attached to its lower end a cam roller '75 engaging the periphery of a cam '76 keyed to the shaft 44 by which it is rotated in synchronism with the cam shaft 26'.

Surrounding the rod '73 between the top 2.and the roller yoke, is a compression spring '74 to hold the roller '75 in contact with'the cam and to I raise the saws as the cam rotates.

shaft 58 and v extending Positioned on one side of the plate 37 are dual magazines '77, arranged vertically above one of the pair of holes 14, 14 and supported by a bracket 78 attached to the plate 5.

Opposite the magazines '77, '77 the top 2 is provided with an opening '79 below the holes 14 in the plate 8, through which the completed work is discharged to a chute 80. (See Figures 1 and U Now, as the pulley is rotated by a source of power not shown, the shaft 58 will be rotated at a relatively higher speed than the shaft 44 which is driven through the worm 4'7 and worm gear 46, and through the gears 63 and 64 the saws will likewise be rotated at higher speed. As the collars or sleeves to be split are fed into the magazines 7'7, '77, they will drop into the holes 14, 14, in the plate 8.

When the cam shaft 26is rotated, the index disc will be rotated intermittently to bring the work into position in pairs below the saws. Also, as the cam shaft is rotated, the dog 24 will first force the key 19 on the bar 18out of its registering notch 16 in the disc 11, thus releasing the lock disc to permit'rotation of the plate 8. Also the cam 31 will have advanced beyond the position shown at Figure 2, to permit the plate 37 to raise the fingers '70 out of the holes 14. I At this time the frame l2 will be in the full line position as shown at Figure 2 with the saws 6'7, 6'7 raised above the plate 8, through the synchronization of the action of the cam '76 and the cam 31, dog 24 and index disc 12.0f the shaft 26.

When the plate 8 has been indexed to bring new work into position under the saws, the cam the'cam '76, accuratey and quickly bisecting the work beneath them. The saws will then be lifted clear of the plate 8, and next, the plate 3'7 will be raised, when released by its cam 31, by the springs 39. The plate 8 is now free to be rotated as previously described.

The gears 64, 65 may be interchanged to vary the speed of the saws for various types of work and metals.

It is thus seen that I have provided an automatic, accurate and'rapid machine for the splitting of bushings,'collars,' sleeves and the like.

Having described my-invention, I claim:

In a device of the type'described, an oscillatory arbor support, a rotary arbor'mounted in said support, spaced cutters on said arbor, a rotatable magazine plate below said cutters and formed with radially'disposed slots to receiveobjects to be split, a vertical shaft for said magazine plate a shaft below said magazine plate, means connected between said shafts to turn the magazine plate to bring the objects carried thereby successively below the cutters, spring lock means between said shafts to hold the magazine plate in an indexed position, a clamp plate above said magazine plate, cam actuated clamp fingers on said clamp plate to hold the objects carried by the indexed slots in the plate, a second transverse shaft, a cam on said second shaft, and means connected between said oscillatory support and the latter to force the cutters through the objects clamped in the indexed slots in the plate, to split them.

FREDERICK H. SMITH.

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