US1389308A - Slotting-machine - Google Patents

Description

H. S. JONES. 'sLoTTlNG MACHINE. APPLICATION FILED `MY,19I8.

Patented Aug. 30, 1921.

H. S. JONES.

SLOTTING MACHINE.

APPLICATION FILED MAY 6. 1918.

1 ,$189,308. Patented Aug. 3o, 1921.

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hhllmllnl H. S. JONES.

SLOTTING MACHINE.

APPLICATION FILED MAY 6, |918.

1,389, 308 Patented Aug. 30, 1921.

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H. S. IONES.

SLOTTING MACHINE.

APPLICATloN FILED MAYe. 1913.

`H. S. JONES.

SLOTTING MACHINE.

Patented Aug. 30, 1921.

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UNITED STATES HERBERT S. JONES, OF DETROIT, MICHIGAN, ASSIGNOR PATENT OFFICE.

TO PACKARD MOTOR CAR SLOTTING-MACHINE.

f Application :tiled May 6,

To all whom t may concern.:

Be it known that I, lHERBERT S. JONES, a citizen of the Dominion of Canada, and resident of Detroit, Wayne county, State of Michigan, have invented certain new and useful Improvements in S-lotting-Machines, of which the following is a specification.

This invention relates to slotting machines and particularly to machines for castellating nuts.

The well known and usual form of castellated nut is one in which three pairs of slots are cut in the upper part of the nut to permit the use of cotter pins extending through the bolt upon which the nut is placed for the purpose of securely locking the nut against turning on the bolt. The pairs of slots referred to are in reality three sl-ots extending radially ofthe .airis of the nut and equally spaced yfrom ealch other, as shown particularly in the finished nut W'- in Figure 6 of the drawingsof this specification.

One of the objects of the invention is to provide a machine, largely automatic, to form the castellations or slots in nuts such as referred to a-bove.

Another object of the invention is to provide a machine of rigid and durable construction for the purpose of slotting nuts or other articles of various sizes.

Another object of the invention is to provide more simple and eilicient operating mechanism for slotting machines.

Anotherobject of the invention is to provide a slotting machine which is automatic throughout its operation.

Another object of the invention is to provide a slotting machine with direct and positive interconnecting gearing between its cutter mechanism and its `work supporting and operating mechanism. l

Other objects and attainments of the invention will appear vfrom the following descriptionftaken in connection with the drawings which form a part of this specification,

and in which Fig. 1 is a plan view of a slotting machine embodying the invention;

Fig. 2 is a plan view ofthe machine shown in Fig. 1 Awithl the Cutter operating mecha- Specification of Letters Patent.

Patented Aug. 30, 1921.

1918. Serial N0. 232,834.

nism and its supporting bracket, as well as the )vork feeding magazine removed;

F 1g. 3 is partly inI vertical section and partly in elevation, illustrating the machine shown'in Fig. 1;

Fig. 4 is a somewhat enlarged side elevation v1ew of the work magazine supporting means;

Fig. 5 is an elevation of the machine taken from the right of Fig. 3;

Fig. 6 is an enlarged plan view of the work table or work support, some parts being broken away;

l Fig. 7 is a vertical [transverse section hrough the work table on the line 7-7 of Fig. 8 is a more inclusive vertical section through the work table and is on the line 8 8 of Fig. 6;

Fig. 9 is a fragmentary perspective view of one of the clamp operating cams and associated parts; and

Fig. 10 is a perspectiveviewof some of the clampingvparts.

Referring to the drawings, 20 represents the base or supporting casting of the machine, this base preferably havingl legs` 21 and providing an oil'catch basin 22 with a sump 23 in the bottom thereof. Mounted upon this base and secured thereto as b bolts .24 is another casting 25 which constltutes the main frame of the machine. A third casting 26 is suitably -boltedupon the frame 25 and forms the supporting means or bracket for the cutter mechanism of the machine.'

The automatic operation of the machine contemplates the use of a movable support for the work, and in the machine illustrated herein this support'comprises a work table 27 arranged to rotate about a vertical axis or in other words in a horizontal plane. v It is mounted in a vertical bearing 28 in an arm 29 of the main frame or casting 25 andit -principally comprises a,body or bed portion table 27 it will be seen that the latter may be vertically reciprocated by the movement of its spindle 31 in the bushing 33, and it may also be rotated by movement of the bushing 33 in the bearing 28, about the axis of the table spindle.

The means for operating the table, both vertically and about its axis, comprises a vertical shaft 35 (driven as hereinafter described through a gear 36 at its upper end), the driving part 37 of the well known eneva movement (the driven part 38 of which is connected to the bushing 33 of the table), a horizontal shaft 39 driven by bevel gears 40 from the shaft 35, and a cam 41 on the end of the shaft 39 and operatively connected to the lower end of the spindle 31.

The Geneva movement referred to is illus@ trated in plan in Fig. 2 and shows up in elevation in Figs. 3, 5 and8. It comprises the usual operating arm 42 having a pin 43 adapted to operate in slots 44 formed in a plate 45 which is keyed to the bushing 33 and secured thereto as by a nut 46. Between the radial slots 44 above described the plate 45 is formed with arc shaped peripheral depressions 47 in which the circular disk 48 on the shaft 35 is adapted to operate and form a locking connection between the parts 37 and 38 except when the cut-away portion 49 of said disk 48 is on the side of the plate 45 when the latter is released for the purpose of permitting the pin 43 to rotate the plate 45 through a part of a revolution, depending upon the number of slots 44. In the form shown there are six of these slots which correspond. with the number of pieces of work to be operated upon on the work table.

The table reciprocating mechanism above referred to is provided with an adjustment by which the upper limit of movement of the table may be varied to suit various sizes of Work or depth of'cut. Thus the spindle 31 has a stud 50 therein upon which it turns and which extends beyond Aits lower end, which stud is provided with a roller holder 51 which straddles the cam 41 and is provided with a roller 52 which rests upon the cam. Extensions 53 of the roller holder 51, on either side of the cam 41, prevent the roller holder and the stud 50 from turning` with the table, and nuts 54 on a threaded part 55 of the stud 50 permit adjustment of the stud relative to the spindle 31, thereby raising or lowering the table 27 relative to the cam 41. A. washer 56 arranged between the-upper nut 54 and the lower end of the spindle 31 takes care of the end thrust of the table on the stud.

The work table or work support 27 above referred to is provided adjacent its periphery with a series of work receiving recesses 57 and in the form of the invention 'shown herein these recesses are substantially circular and they extend vertically entirely through the table 27. These recesses 57 are large enough to permit the largest sized nut its peri hery and a short distance below its upper ace. This slot may be formed in any suitable Way, but as shown the bed 30 of the table is cut away on its upper surface to form the slot 58 and a plate 59 is secured to the'top of-the bed as by screws 60 thus leaving the slot 58 between the outer parts of the plate 59 and the bed 30.

Means are provided for retaining the nuts WV or other Work in the upper part of the recesses 57 throughout a part of the complete revolution of the table 27 so that the said nut will project above the top of the table where it may be operated upon by the tools hereinafter described. vIn the form of the invention herein shown this means comprises in part a horse-shoe shaped plate 61 the annularpart of which extends into the slot of the table and is or may be supported therein by the table. It will be understood that Iin assembling the parts this plate 61 is placed in the slot 58 before the plate 59 is secured in place, and after this is done the lplate 61 will form a support for the nuts WV in the upper parts of the recesses 57 and will prevent the nuts from dropping through thexrecesses except where the recesses pass\between the ends 62 of the plate 61 as the table rotates relative to said plate. For the purpose of retaining the plate 61 against rotation with the table lugs 63 or other means are provided to abut against a part 64 of the frame 25 as shown particularly in Figs. 1, 3 and 6. These lugs 63 and the parts 64 of the frame against which they abut are so made as to have a' sliding lit vertically thus permitting the table t0 carry the plate 61 with it in its verticallyreciprocating movement.

The work retaining means above referred to further `comprises a. clamping device for each of the recesses 57 of the work table. As all of-these clamping devices are alike only one of them will be described. The

upper part of the recess 57 is formed by two clamping jaws 65 and 66, the jaw'65 being shown as stationary and the jaw 66 as movable, and these jaws may be made separately and mounted upon the table.l

They are shown'in detail in Fig. `10, the stationary jaw 65 having lugs 67 'by which it is secured as by screws 68-.to the plate 59 at the periphery of said plate. It is preferably mortised into Vthe plate 'so that it does nt project into the slot 58 andit is rovided with dowels `67 which rest in drilled sockets 67 in-the plate 59 for thus taking the radial strain olf of the screws 68. This construction is particularly well shdwn in Figs. 6 and 7.. The movable jaw 66 1s formed with side flanges 69 and is mounted Vto slide radially ofthe Work table in Ways.

the rock shaft 72 is provided with an armI 73 having two operating faces 74 and 75, which faces are adapted to respectively cooperate with cams 76 and 77 mounted on the frame of the machine beneath the table. Thesevcams'are shown in dotted lines in the plan view of the table in Fig. 6. In Fig.-

2 thex detail construction of the cam 76 is. shown. AIt comprises a head 78 on a hollow shank 79 in a cylindrical recess 81 of a bracket 82 secured to the arm 29 of the frame 25 as by the bolts 83 (Fig. 3). A kfollower bolt 84 threads into the bracket 82 and abuts against the end of a spring 80 which extends into the shank 79, and the tension of lthe spring -is thereby adjusted. This arrangement provides for slight give in the cam action to thereby climi-nate some of the shock incidental to the movement of the table when the clamping devices pass the cam 76.

The cam 77 is also shown in Fig. 2 but it is probably best shown in the perspective view, Fig. 9, and it comprises a head 85 upon which the cam surface 77 is formed,` and a cylindrical shank'86 which sets in a Isuitable opening in a block 87 secured to the arm 29 of the frame of the machine as by screws 88. A set screw 89 retains the cam in position. If desired a backing block l90'may be secured `to thearm 29 back of the head 85 to bettersupport the latter. From this construction it will be seen that the cam may be readily removed and another cam inserted to vary the operation of the clamping devices.

The operation of the clamping devices can probabl be best observed by reference to Fig. 6. y means hereinafter described a nutW, or other piece of work, is fed into the recess at approximately the point a of the table. The clamping j aw 66 -is in its ref tracted position as shown in said Fig. 6 and as the table rotates in the direction of the arrow 91 the cam surface y74'of the arm 73 cornes in contact with the cam 76 and rotates the shaft 72. .This movementof the shaft I'through its eccentric or offset head 7,1

causesthe movable jaw 66 to slide radially outward -toward the stationary jaw 65.

The parts are so adjusted that the eccentric head 71 just 'reaches or passes over the dead center and stops against one end of the slot as the clamping jaws grip the nut l/V tightly between them so that as the cam surface 74 leaves the cam 76 the jaws will remain in clamping position against the nut. The clamping devices remain in clamped position as the table passes points b, c, ci and e. Just after the latter point is passed the cam surface comes in contact with the cam 77 rocking the shaft 72 in the reverse diction and thereby retracting the movable clamping jaw 66 by releasing the nut W. At this point also it will be seen that the nut W has passed beyond the endI of the plate 61 andas it is unclamped it therefore drops through the recess 57 and out of the machine into any suitable receptacle that may be placed beneath the work table for it.

For the purpose of keeping chips and dirt out of the working parts of the clamping devices cover plates 92 are secured over the devices as by screws 93. For lthe purpose of automatically feeding the nuts or other work to the machine, a Work magazine 94 is provided as shown particularly inFigs. l, 4` and 5. This magazine is preferably shaped in accordance with the cross section of the nuts so that the latter will be fed in proper -relation to the clamping jaws 65 and 66, and the latter are preferably shaped to fit the nut, as particularly shown in Fig. 6. It lwill be understood that the nuts are placed either byhand or otherwise in the magazine and the latter is supported vertically above the work table preferably at the point a of said table. In order that the mag# azine 94 may rise and fall with the table, it is supported by an arm 95 which is pivoted on the frame of the machine as at 96 and braced laterally by guides 97. An adjustable stop 98 is provided beneath the arm as shown particularly in Fig. 4 to prevent the magazine from' dropping .down against the table when the latter is in its lowest position.

It will be understood that as the work table is intermittently rotated the nut which has been dropped into the 4recess aft a will be clamped and carried along with the table while. the. magazine remains stationary and the next nut in the magazinel will drop down on the -upper face of the table and slide along on the latter until the next recess is brought under it. That nut will then drop into the recess and the feeding process is repeated. 1

As stated hereinabove the machine illu's- I Thetable 27 therefore is forrned with six of the recesses 57 spaced sixtyy degrees apart and cutters are arranged for operatmg upon the nuts in three of these recesses. With the cutters arranged to cut in parallel planes the slots will therefore be spaced on the nut sixty degrees apart. As shown, three cutters are provided to operate simultaneously on three nuts on the work table, two of the cutters being mounte-d on one| shaft and the other cutter on a second parallel shaft. The cutters are shown at C in several o-f the figures and are of the desired form to cut the required slot. A shaft 99 supports two of the cutters spaced from each other and operates in bearings 100 and 101 in the casting or bracket 26 of the machine. This shaft 99 is driven by a suitable power device through a pulley 102 and it is geared as by gears 103 and 104 to'a shaft 105 upon l which the third cutter C is mounted. Thus two of the cutters are directly driven and the third one is gear driven at the same speed and a very efficient action is obtained. In the position of the work table shown in Figs. 1 and 6, its six positions are indicated by a., b, c, d, e and f, and it will be seen that one of the cutters C is arranged over the nut or the recess in which it rests at the point c and the other two cutters are arranged over the recesses at the points d and e respectively. At all three of these points the nut or other Work is clamped in the recesses by the clamping devices above -described and after the nut passes th'elpoint e it is dropped out through the recess 57 by reason of the unclamping action vof the clamping device and of' the fact that the plate 61 is no longer under the nut to sup] port it.

The shaft 105 above referred to is mounted in bearings 106 and 107 in the bracket 26, and at its end opposite from the cutter C it is provided with a gear 108 which meshes with a gear 109 on a shaft 110, which latter shaft is mounted in a bearing 111 in a downwardly extended lug of the'bracket 26. The shaft 110has a bevel gear 112 which meshes 4with the gear 36 hereinabove referred to in connection with the driving mechanism for the table 27. Thus the table rotating and reciprocating mechanism is driven through gears from the cutter shafts 99 and 105 and therefore in synchrony therewith. It will be understood that the various parts of the machine are so timed that the table 27 will remain in non-rotatin position while it is fed toward the cutter or raised so that the cutters will form the slots in the nuts in the recesses of the table. After the table has been retracted by the operation of the cam mechanism, the Geneva movement reaches the oint where the arm 42 rotates the table 2 through one-sixth of a revolution and it is then locked by the plate 48 while thenext reciprocation of the table i takes place. All of this time ofcourse the cutters are constantly rotating and operatcularl ing on the nuts as the table is fed toward them and the nut feeding magazine rises and falls slightly with the table in the latters feeding moti.l 71. The intermittent rotation of the tablet also causes the clamping and unclamping of the nuts in the hereinabove described manner so that they are automatically fed to the recesses as the latter pass under the magazine and 'automatically ejected therefrom as they are unclamped and pass beyond one of the ends 62 of the plate 6l.

It will be further understood that a singleform only of the mechanism has been herein v shown and described, but certain parts of the'machine are susceptible of modification within the scope of the invention and some parts of the machine are susceptible of use in other combinations than those illustrated, and these other forms and uses are intended to and should be covered -by the application las defined by the claims. A

Having thus described my invention, what I claim and desire to secure by Letters Patent is:

1. A machine for slotting metal articles having in combination, two parallel cutter shafts, two cutters 0n one of said shafts a third cutter on the othershaft, means or driving said shafts, and a work carrier operable to carry the work successively against said cutters. A

2. A machine for slotting metal articles having in combination, two parallel cutter shafts, two cutters onone of said shafts, a. third cutter on the other shaft, said three cutters,being spaced to operate in different planes, means for driving the cutter shafts, and work carrier operable to carry the work successively against said cutters.

3. A machine for slotting metal articles having in combination, two parallel cutter shafts, twocutters on one ofl said shafts, a. third cutter on the other shaft, gears directly connecting said shafts, means for driving one of said shafts, a. work carrier, and means operable to relatively move the work carrier and cutters to carry the 'work successively against the cutters.

4.' In a machine of the class described, the combination with a rotatable work carrier, of a shaft extending in a plane radial. to the axis of said carrier, a second shaft parallel to and offset from the first shaft, a cutter on the first shaft, two cutters on the second shaft arranged to operate in parallel with the first cutter, and means for driving such shafts, said cutters having their points of contact with the Work spaced apart cir,-

5. n a machine of the class described, the combination with a rotatable work carrier, of a shaftextending in a plane radial to the axis of said carrier, a second shaft parallel to and offset from the first shaft; acutter on thesrst shaft, two cutters on the second 'sliaft arranged to operate in parallel with the first cutter, gears connecting said shafts, driving means for one of said'shafts, said cutters having their points of contact vWith the work spaced apart circularly and positive gear connections between said shaft driving-means and the work carrier.

6. In a machine of the class described, the combination with a work support, of three slot cutters arranged to operate in three different planes on three separate pieces of work on said'carrier, means for operating said cutters, and means for carrying each piece of Work successively against each of said cutters.

7. In a nut castellating machine, the combination with yan intermittently rotating work table or support, of three' slot cutters arranged in three separate planes and spaced 1 apart' circularly with respect to said table and adapted to operate on individual pieces of Work on the support, means for driving said cutters, and means for successively carrying each piece of work against each of the cutters.

8. In' a nut castellating machine, the combination with an intermittently rotating worlrtable lor support, of three slot cutters arranged in three separate planes andadapted to successively operate on individual pieces of'work on the support, said cutters being spaced apart circularly in the circular path of movement of the pieces of worlron the table,y two of said cutters being mounted on one shaft, and means for driving said cutters.

9. In a machine for slotting metal articles,

the combinatibn with a movable work table lhaving a series of circularly spaced recsses, 'of a plate arranged to form a bottom for said recesses during part o the movement of said tabl means to clamp said work in said recesses, means to release said clamps and means for moving said 'table relatively to said plate.

10. In a machine for slotting nuts, the

lcombination with a rotatable Awork table having a series of nut receiving recesses, re-

leasable radially movable clamps adapted to hold said nuts in said recesses and means to release said clamps at a certain point in the travel of the table, of a plate arranged to support the work in said recesses throughout part of the rotation of said table, said plate terminating short of the full movement of the table whereby after the nuts have beenv released by the clamping means they will fallfrom the table as the recesses of the latter pass beyond the end of the plate, .and means for 'intermittently rotating said table relatively to said plate.

11. Ina machine of the class described, the

combination with. a rotatable work table having a series of recesses, of a plate arranged to support the work in said recesses throughout part of the rotation of said table, means on the table for clamping the work in place in said recesses, and means for intermittently rotating the table relatively to the plate.

12. In a machine of the class described, the combination with a work table having recesses for the work,^of a plate adapted to retain the work in some of said recesses, means for effecting relative rotation between the table and plate, and means for reciprocating the table and plate together longitudinally of the axis of rotation.

13. In a machine of the class described, the combination with a rotatable Work table having a plurality of recesses for holding simultaneously articles to be worked upon, of a plate supported by said table, common to said recesses and operable to assist in retaining the Workin said recesses, means for rotating the table relatively to said plate, and va plurality of cutters having their cutting edges successively disposed inthe line of travel of the work as the table rotates.

14.. In a machine of the class described, a rotatingwork table having a peripheral slot and having work receiving recesses in its face extending into said slot, and a nonrotating plate extending into said slot and adapted to support 4the Work in said recesses.

15. In a machine of the class described,

. the combination with the 4frame of the maarranged in contact with the frame of the.l

machine to retain it against rotation with the table.

16. In a machine of the class described, the combination With the frame of the machine havin la bearing therein, of a bushing in said caring, a plate secured to Vsaid bushing, al spindle keyed for reciprocation in said bushing, a work table supported by y the spindle, and means for rotating and reciprocating said table comprising devices connected to said plate and said spindle.

17. In a machine of the class described, the combination with the frame of the machine having a vertical bearing therein, of 'a bushing in said bearing, a spindle keyed for reciprocation in said bushing, a table mounted on the spindle, means for reciproeating the spindle, and means for rotating the bushing. I

18. In a machine ofthe class described, vthe combination with the frameof the machine having a vertical bearing therein, of

a bushing in said bearing, aI spindle keyed for reciprocation in said bushing, a table mounted on the spindle, 'means for reciprocating the spindle, and interconnected gearing for rotating the bushing.

19. In a machineof the class described-f.

the combination with the frame of the machine having a vertical bearing therein, of a bushing in said bearing, a spindle keyed flor reciprocation` in said bushing, a table mounted on the spindle, means including an` adjustable device for reciprocating the spin` dle, and means for rotating the bushing. i

20. In a machine of the class described, the combination with the frame of the machine having a vertical bearing therein, of a bushing in said bearing, a spindle keyed for reciprocation in said bushing, a table mounted on the spindle, a stud adjustably connected to the spindle and `having means for engagement with a cam, a cam engaging said stud to reciprocate the spindle, and means for rotating the bushing.

21. In a nut castellating machine, the combination of an intermittently rotating work table having a series of recesses for the nuts, of radially movable clamping devices, means adjacent to the table adapted to operate said devices as the table rotates, a fixed supporting plate for said nuts terminating at the desired point of delivery of the latter, and means for releasing each of said clamping devices as it arrives substantially opposite the point of termination of said supporting plate.

22. In a nut castellating machine, a combination with an intermittently rotating work table having a series of recesses for the nuts, of radially movable clamping devices on said table, means adjacent to the table adapted to operate said devices as the table rotates, a plate located under and parallel to said table and constituting a support for the nuts for a portion of their travel and terminating at the point of desired delivery thereof to permit the deposit of the nuts, said clamp operating means comprising two separate cams, one of which operatesto force the devices against the nuts at the beginning of their series of operations, and the other of which operates to release the devices successively opposite the said termination of the supporting plate.

23. In. a nut castellating machine, the combination with an intermittently rotating work table having a series of recesses for the nuts, said recesses extending vertically through the table, clamping devlces for the nuts on the upper face of the table, means beneath the table for actuating said clamping devices and a supporting plate extending with the frame of the machine, of a rotating and reciprocating work table thereon, aV work magazine,l and a pivotal support for said magazine mounted on the frame.

25. In a slotting machine, the combination with the frame of the machine, of a rotating and reciprocating work table thereon, a work magazine, a pivotal support for said magazine mounted on the frame, and an adjustable stop to limit the movement of said support.

26. In a machine for operating on nuts, the combination with a rotating Work table arranged in a horizontal plane and having a series of work receiving recesses extending vertically through the table,means for effecting a step-by-step movement of said work table, of means for automatically feeding nuts to said recesses and retaining them therein during several of the successive steps of said table, a plurality of cutters, means for effecting successive operation of said cutters upon each of Asaid nuts while so retained in said recesses and while the work table is stationary between said movements, and means for: automatically discharging said nuts through said recesses after the work has been performed on them.

27. In a machine of the class described, the coiiibination with a rotating work table arranged in a horizontal plane and having a series of work receiving recesses, and means for effecting a step-bystep movement of said Work table, of meansfor automatically feeding pieces of Work to said recesses and retaining them therein during several of the successive step movements of said table, a plurality of cutters, means arranged for effecting successive cutting operations f upon each 'ofsaid pieces of work while so retained in said recesses and while the table is held stationary between said movements, and means for automatically discharging the pieces of work after the cutting operations have been performed upon them.

In testimony whereof I aiix my signature.

HERBERT S. JONES.

'nsl

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