US576979A

US576979A - Automatic milling-machine

Info

Publication number: US576979A
Authority: US
Publication date: 1897-02-09
Anticipated expiration: 1914-02-09

Description

' 15 Sheets-Sheet 1, I

(No Model.) w J. GREGGRY.

I AUTOMATIC MILLING-MACHINE. No. 576,979. Patented Feb. 9, 1897.

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(.No Model.) 15 SheetsSl1eet 2.

J. GREGORY. AUTOMATIC MILLING MACHINE;

No. 576,979. Patented Feb. 9, 1897.

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(No Model.) 15 Sheets-Sheet 3.

J. GREGORY. AUTOMATIGMILLING MAGHINE.

No. 576,979. Patented Feb. 9, 1897.

' 6 I wveflin .wdmm & JAMES 'GREGOIEY myw A t e h S m e e h S H R N H G .A YM m 0 m BI M 6 H A M 0 T U A a d 0 M 0 w No. 576,979. Patented Feb. 9, 1897.

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15 SheetsSheet 5.

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J GREGORY. AUTOMATIC MILLING MACHINE. No. 576,979. 7 PatentedFeb. 9-, 1897,

v mmm' Q/VdM/QMM, 7 JAMES GREGOR (No Model.) 15 Shqets-Sheet 6.

J. GREGORY. AUTOMATIC MILLING MACHINE.

Patented ]Eeb.9,189'7.

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' J. GREGORY.

AUTOMATIC MILLING MACHINE.

No.5'76,979. Patented Feb.9,1897.

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' WWWQ/W H mwzw GHWW- (No Model.) 1s sheets-sheet s.

J. GREGORY.

AUTOMATIC MILLING MACHINE.

No. 576.979. Patented Feb. 9, 189-7.

Suva/@504: JAMES GREGORY Q? mamw. D. 0

' ModeL) 15 Sheets-Sheet 9.

J. GREGORY.

AUTOMATIC MILLING MACHINE. No. 576,979. Patented Feb 9,1897.

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' 15 Sheets-Sheet 10.. .J. GREGORY. AUTOMATIU- MILLING MACHINE.

Patented Feb. 9, 1897.

Ila-576,979.

A m 605cm?! (No Model.) 15 Sheets-Sheet 11.

J. GREGORY. AUTOMATIG MILLING MAGHINE.

No. 576,979. Patented Feb. 9, 1897.

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flMZflMm/M 1 ww (No Model.) 1 15 Sheets-sheaf 12.

- J. GREGORY.

AUTOMATIC-MILLING MACHINE. N0. 5'76,979. Patented Feb. 9, 1897.

.A'r mu u HM l/ a A Z 7 4 JA ES GREGORY NaN (No Model.) 15 Shee'ts-Sheet 13.'

-J. GREGORY. AUTOMATIG MILLING MACHINE; No. 576,979. Peptented F.eb.'9, 1897.

JAMES GREGORY (No Model.) 15 sheets-sheet 14.

J. GREGORY. AUTQMATIG MILLING MACHINE.

No. 576,979. j Patented Feb. 9, 1897.

- (No ModeL) l5 Sheets-.-Sheet 15.

J. GREGORY. AUTOMATIC MILLING MACHINE. No. 576,979. Patented Peb. 9, 1897 mg F m2 3w \llllllllflllflnn awe 14%: JA MES GREGORY YHE NORRIS PETERS CO. PHOTCLLITHQ. WASQXNGTON, D. C.

"UNITE-D STATES PATENT OFFICE.

' JAMES GREGORY, OF BRIDGEPORT, CONNECTICUT.

AUTOMATlClVilL LlNG-MACHINE.

SPECIFICATION forming part ofv Letters Patent No. 576,979, dated February 9, 1897.

Application filed February 12, 1896. Serial No.'579,095. (N model.)

To all. whom it may concern:

Be it knownthat I, JAMES GREGORY, a citizen of the United States, and a resident of Bridgeport, in the county of Fairfield and State of Connecticut, have invented certain new and useful Improvements in Automatic Milling-Machines, of which the following is a specification.

Thisinvention relates to new and useful improvements in automatic milling-machines, such, for instance, as are used to mill the straight sides of valve-bodies, hubs, wastenuts, and the like.

It is the object of my invention to provide an automatic machine of the class specified which shall be particularly adapted for the milling of six-sided hubs, such, for instance, as are now used'in the top of two-way valves and as is shown in Fig.18 of the accompanying drawings. In the construction of this machine I provide adjustments to accommodate the different sizes of these hubs, means for securely retaining them in position with respect to the cutters for milling the same, means for carrying said hubs from one milling-station to another, and means for antomatically removing the hubs from the machine after the same have been finally completed.

Upon the accompanying drawings, forming part of this specification, the same referencecharacters denote like or corresponding parts upon the several figures, and of which- Figure 1 shows a front elevation of my novel machine, the mechanism thereof for removing the hubs being broken away. Fig. 2 is a side elevation of the machine as seen from the left of Fig. 1, the hub-removing mechanism being detached. Fig. 3 is a top plan view of the machine, the hub-removing mechanism 0 being shown in sectional plan.

Fig. 4 is a vertical cross-section on line a (t of Fig. 3. Fig. 5 is a plan View of the machine with the milling-heads and their slides removed therefrom, the cover of the table B being removed, showing the gearing mechanism. Fig. 6 is an inverted plan view of the top cover 34 of the table B. Fig. 7 shows a detached side elevation and a plan view, respectively, of one of the slides 83, which support the carriage '76 of the milling-head. Fig. Sis an inverted sectional plan view on line b b of Fig. 1,1ookingin the direction of arrow. Fig. 8 isau inverted detail sectional plan view through shaft A, taken on line b b of Fig. 2. Fig. 9 is an enlarged sectional plan View on line 0 c of Fig. 2. (See arrow.) Fig. 10 isa sectional plan view on line d d of Fig. 1. (See arrow.) Fig. 11 is a sectional plan view, partly broken away, on line 6 e of Fig. 1. (See arrow.) Fig. 12 is an enlarged vertical sectional view on line ff of Figs. 9 and 10. Fig. 13 is an enlarged vertical central sectional view through one of the'milling-heads C as taken on line g g of Fig. 3. Fig. 14 is an enlarged central vertical sectional view of one of the movable holders D, taken on line h of Fig. 3, said holder showing a hub secured therein ready to be milled. Fig. 15 is a similar sectional View, the central post 49 thereof and its hub being in a raised position to permit the free detachment of said hub. Figs. 16 and 17 show a side elevation of a detachable seat i and a fittingj, which are shown in section in Figs. 14 and 15, said seat and fitting being made in various sizes which are substituted to accommodate different sizes of hubs to be milled. Fig. 18 shows a side elevation of one of the finished hubs, also the valve of which it forms a part. Figs. 19 and 20 show vertical sectional views taken on lines 7. and Z, respectively, of Fig. 0. Figs. 21 and 22 show enlarged sectional elevations of clutch mechanism, taken on line m of Fig. 11, looking in opposite directions. Fig. 23 is a vertical longitudinal sectional plan view of said clutch mechanism shown in Figs. 10, 21, and

Fig. 24 is a detached side elevation of the automatic mechanism for removing the hubs from the machine after they have been milled. Fig. 25 is an enlarged sectional plan view on line n of Fig. 24, showing in dotted lines the moved position of the arm E, which throws the completed hubs from the machine. Fig. 26 is an enlarged detached side elevation of said arm E. Fig. 27 is a cross-sectionon line 0 0 of Fig. 25, the spring-actuated slide 153 being drawn out. i Fig. 28 is a central vertical sectional view of the hub removing mechanism, the position of the parts agreeing with Fig. 24 of the drawings. Fig. 29 is a top plan view of Fig. 24. ,Fig. 30' is a sectional plan view on linepp of Fig. 28. Figs. 31 and 32 show side elevations of the closed and open positions of the gripping-head F for removing the hubs. Fig. 33 is a central vertical sectional view of said gripping-head, the position of the parts agreeing with Fig. 32.

Before enteringinto a detailed description of the construction of my machine I will briefly state themethod of operating the same to afford a general idea of its operation and construction.

The machine consists of suitable frameworkand driving connections whereby the table B is given a number of rotary move ments, eight of which constitute a complete rotation. Said table is provided with holders D, which serve to retain the hubs to be milled in their proper position during the several cutting operations thereon by the movable millers G, H, I, K, L, and M. These millers are stationed at equal distances apart upon the frame of the machine and each serve to mill off the respective surfaces g, h, 1', 7t, Z, and m of said hub. By the time the several surfaces of the hub have been milled the same is around at the left of the table (see Figs. 1 and 3) in line with the mechanism for removing the same,which mechanism is sh own in Figs. 24 to 27, inclusive, and operates as follows:

The, hub is removed bya downward movement of the gripping-head F, after which the jaws thereof are forced together. Then the head is given a rotary movement, which disconnects the hub from its holder D, after which said hub is elevated su fficiently to allow the plate 148 to pass thereunder to receive said hub, whereupon said jaws are opened and the hub allowed to drop, after which the plate is carried to the dotted position shown in Fig. 25, where it is tilted outward, thereby dropping the hub therefrom. The holder then moves downward to receive another hub and the operations are so repeated.

It will be obvious from an inspection of the drawings that the construction and operation of the mechanism of each of the eight holders D, the six cutters, and the mechanism immediat ely connected therewith are substantially each duplicates of the other in each instance. Therefore I will refer to the like parts of these several sets of mechanism with similar reference -,characters throughout the various figures in the drawings.

Frame and Driving fllechcm'ism.

Referring to the reference-characters upon the several figures of the drawings, 1 indicates the bed-plate of the machine, 2 legs supporting the same, and 3 hangers secured to the under side of said bed-plate and which support shafts of the driving mechanism.

4 indicates vertical posts which are screwed to the bed-plate and have bolted to their upper end a circular frame 5, all of which constitute the main frame of the machine.

Referring to Figs. 1, 3, and 10, 6 indicates the main driving-wheel, 7 its shaft, and 8 a bearing for the same. Said shaft 7 is alsojournaled in one of the hangers 3 of the framework and bears upon its inner end a small beveled pinion 9 to engage with and drive an idler 10 upon the depending stud 11, secured to the under side of the bed-plate. The idler 10, above mentioned, serves to transmit motion to each of the five beveled pinions 12 of the radialshafts 13, journaled in thelegs 2 and hangers 3, before mentioned. These shafts are provided with pulleys 14 upon their outer ends, which in turn are provided with belt connections 80 with the cutters (J on the top of the machine, which will be later described.

The beveled pinion 12 of the shaft 13 (see Fig. 11) serves to drive the worm 15 through clutch mechanism N on said shaft as follows: Referring to Figs. 21, 22, and 23, the shaft 13 is provided with a disk 16, which is hollowed out to receive clamping mechanism, (shown in Figs. 22 and 23,) the construction of which is as follows:' The outer end of the shaft 13 is bored to receive the shank 17 of the hub 18, which is engaged by the operating-lever 19. The inner end of this shank 17 is provided with a pin 20, which passes through a central slot ofthe shaft 13 and engages a ring 21, loose upon said shaft, but which turns with it by reason of the connection just mentioned. This ring is provided with a peripheral groove to receive shoes 22, having link connections 23 with the wedges 24, which serve to simultaneously engage the inclined ends of the semicircular spring-actuated engaging blocks 25.

From the above construction it will be obvious that with each outward movement of the operating-lever 19 and the hub 18 said wedges will be forced outward, spreading the semicircular blocks, which in turn instantly engage the inner surface of the disk 16 of the shaft 13, thus completing the connection between said shaft and the worm 15, before mentioned.

Gearing for Driving Shaft A.

The worm 15 upon the shaft 13 (see Figs. 11 and 12) connects with and drives the gear 26, the hub of which is provided with a gearface 27 to engage that of an idle-gear 28,which is made integral with an elliptical gear 29, meshing with and driving another elliptical gear 30 on the vertical shaft A. This train of gearing is employed to communicate power to all the machine except the several cutters, and owing to the employment of the

elliptical gears

29 and 30 it will be obvious that the shaft A is afforded an irregular rotation that is to say, one-half of said rotation is accomplished in about one-quarter of the time that it takes to complete the remainder of said rotation. The above movement of said shaft is particularly desirable, inasmuch as it moves the ring 62 slowly in its forward movement while the milling is effected and quickly in its return idle movement. Said shaft- A (see Figs. 1, 2, and 12) is suitably. journaled in the bearing 31, secured to the bed of the machine and to the bracket 31- upon the under side of the frame 5, previously mentioned, and serves to move the millers during their cutting operation, also to rotate the table B and, further, to operate the mechanism for removing the hubs.

Setting-Tool R. V

frame and having a vertically-adjustable T-shaped piece R secured therein, which piece is bored to receive the spring-actuated setting-tool R, designed to be forced in by the operator until the tip thereof engages the side of the hub and thus retains the same against any rotary movement while being drawn down upon its seat. Rotary Table B for Supporting the Holders.

The table B, (see Figs. 3, 4, and 5,) which supports the holders D for the hubs, consists of a base 33 and a cover 34, (see Figs. 5 and 6,) which are suitably secured together by means of screws engaging the holes 35 of said base. Said table is secured to and supported upon a short hollow column 36, which in turn is mounted upon a large cam-faced disk 37, journaled upon the stationary post 38, the base of which is suitably bolted to the bedplate 1 of the machine.

In connection with the above I employ means for adjusting the height of said table with relation to the bed-plate and whereby the proper depth of the cuts in the hubs are secured, which consists as follows I thread the lower enlarged portion 35) of the post 38 and provide thereon an adjustable nut 40, which, as shown, (see Fig. 4,) serves to support the cam-faced disk 37, which in turn supports the column and table secured thereon. It will be obvious that by turning said adjustable nut 40 to the right, as shown in said Fig. 4, the table will be raised in accordance therewith, while a reverse movement will have an opposite eifect. By this means I am not only enabled to secure a very accurate adjustment for raising and loweringthe table,'but am at the same time able to adjust all of the holders simultaneously.

Operating Connections for Table B. The table B and the parts secured thereto are operated from the before-mentioned verment required to carry the hubs from one cutter to another. In order to hold the disk 37 and the parts carried thereon perfectly rigid during the milling operation, I secure a' sectional disk 43 to the vertical shaft'A, which disk is set in opposite relation to the arm 41.

of said shaft and in such a manner that when the pin of said arm 4l-becomes disengaged from the slot 42 of its disk 37 said disk 43 will have sufficiently entered one of the concave recesses 44 in the periphery of said disk 37 to retain the same perfectly rigid until the pin of the arm has moved around and entered the next slot 42 in the under side of the disk, thereby moving the same.

' The Holders D for Supporting the Hubs.

The mechanism which I have termed as a holder, and which serves to firmly retain the hubs in position upon the rotarytable B during the milling operations, will be best understood with reference to Figs. 4, 14, and 15. In the above connection I provide removable fittings for different sizes of hubs, as shown in Figs. 16 and 17 I also provide means for firmly retaining said hubs in position on said holders, for independently adj usting said holders with relation to the table, for automatically releasing the mechanism for clamping the hubs in position,'and, finally, for removing the finished hubs from said holders.

Within the base of the table B, I form a series of bores arranged at an equal distance apart and provide the same with suitable bushings 45,-which are adjustably secured therein by means of a set-screw 46 upon the under side. \Vithin said bushings I provide a spindle 47 the upper and enlarged face of which is cut to form a gear 48, said gear having connections for rotating said spindle, which I will later describe. Within this spindle 47 is a vertical post 40. To its upper end is attached the fitting j, to which the hubs arescrewed. Around this fitting and to the threaded hub 50 of the spindle 47 is attached a seat 2', upon which the hub is clamped. The means whereby said hub is clamped upon said from such engagement is placed upon the under side of the table, and consists as follows: I thread the lower periphery of the spindle 47 and provide the same with a star-wheel 51, the hub of which is internally threaded to engage those of the spindle, whereby the two become in a measure fixed together. The central post 49, which is adj ustably secured within the spindle 47, is provided with a leadscrew 52, journaled in the lower hub 53 of the star-wh eel 51 and is provided upon either side of said hub with the collars 54 and to the lower end is attached an operating-Wheel 55.

It will be obvious from the construction justoutlined that a movement of the handwheel 55 will raise or lower the post 49, and thus change the position of the hub. It will further be obvious that a movement of the star-wheel upon 'the threaded spindle 47 will in like manner raise or lower the lead-screw 52 and the post attached thereto. Therefore, in the practical operation of my machine, the hubs to be milled are screwed to the upper extremity of the fitting j, as shown in Fig. 15, after which the operator manipulates the hand-wheel 55 in a manner to lower the post 49, thus drawing the hub contained thereon down firmly against its seat, as shown in Fig.

. 14. In this position said hub remains, with relation to its spindle, throughout the several operations and until the star-wheel 51 is engaged by suitable automatic mechanism, which will be later described, and whereby said wheel is given substantially a sixth of a turn upon its spindle 47, which movement is sufficient to slightly raise the post 49, thereby disengaging the hub from its seat and leaving it in a position free to be detached by means of the mechanism provided for that purpose.

JVIechanism for Releasing the Hubs.

The mechanism for operating the star-wheel above mentioned, whereby the hubs are automatically released from the spindles of their holders D, is mounted on the vertical shaft A, and consists in an arm 56, secured thereto, bearing a pin to engage one of the recesses of the star-wheel, which is then dotained at the station nearest to said vertical shaft A, as clearly appears in Fig. 8 of the drawings. It will be obvious that this engagement and operation will move the star- .wheel upon its spindle one-sixth of a turn, thereby raising the vertical post 49 and freeing the hub thereof. At the instant the hub just referred to has been freed from its seat i the mechanism for removing the same from the holder is next operated in a manner to unscrew said hub from its fitting], as will be later more fully described.

llfechcmism for Setting Siar-VVheeZ.

In order to prevent the complete unscrewing of the star-wheel from the spindle, I provide means for turning said star-wheel in a reverse manner to th at described above,which movement insures said star-wheel being set at the beginning of each operation at substantially the same place. This mechanism consists (see Figs. 2, 8, and 9) of a bell-crank lever 60, pivoted at 61 to the ring 62, which is given a remittent oscillatory movement by means of connection with the vertical shaft A, as will be later more fully described. Upon the frame 5 is secured a plate 63, having a cam-groove therein to receive the pin of an arm 64 of the bell-crank lever. It will be understood from this construction that with the forward movement of the ring and its bell-crank lever from the position shown in full lines to that shown in dotted lines (see Fig. 8) the pin of the arm 65 will be brought into line with one of the teeth of the starwheel and will be engaged thereby during the forward movement thereof and given a turnllIechan-ism for Rotating the Ifiibs.

Referring to Figs. 3, 4, and 5, I will next describe the mechanism whereby the hubs and their spindles are partially rotated for each succeeding operation during their movements. from one milling-station to another, which rotary movement is necessary in order to properly shift and line up the successive sides of the hub with respect to the cutters. Upon the post 38 I permanently fix a gearwheel 57, designed to mesh with a pair of idlers 58, which are fixed to suitable studs secured t0 the base 33 of the table. These two idlers in turn mesh with and drive four secondary idlers 59, secured to the base 33 in a similar manner to the idlers 53. Said idlers 59 mesh with and serve to rotate gears 48 of the spindles 47- of the holders. It will thus be obvious that by reason of the rotary movement imparted to the table the idlers just recited will be carried therewith and thus rotate said spindle by means of their connection with the fixed gear 57, above mentioned. The difference in the size of these gears is such as to rotate the spindles one-sixth of a rotation upon their axes, irrespective of the movement of the table, said movement of the spindles being just sufficient to bring into place the next surfaces of the hubs upon the spindles to be milled.

The Remiiient lllo'vable Ring.

The ring 62, above referred to, (see Figs. 4, 5, 8, and 8 is movably fitted into a suitable recess 66 in the under side of the frame 5, previously mentioned, and is supported therein (see Fig. 4) by resting upon the top finished surface of the posts 4. Said ring is given a remittent oscillatory movement from the shaft A by means of a connection consisting of a slot 67, cut radially upon the under side of said ring, (see Fig. 8%) which slot is engaged by a pin in the top side of the disk 68, secured to the upper end of the shaft A. Shaft A is provided with an uneven rotation through its driving connection and accordingly imparts to the ring, through mechanism just recited, a slow forward feeding movement and a fast return movement, thus moving the cutters quickly when idle and slowly when operating upon the hubs, as will be later more fully described.

Milling-Heads C.

The cutters of the milling-heads, of which there are six, are provided with a rotary movement, a remittent oscillatory movement, and suitable adjusting mechanism, whereby the same may be set to accommodate the varying diameters of the different sizes of hubs, the adjustment for the varying heights of said hubs being secured, as before stated, by raising and lowering the table by means of the adjustable ring 40. The construction of said milling-heads consists as fo1lows,(see Figs. 2, 3, 4, 8, and 13:) I provide a spindle 69, bored to receive an inclined split collet 70, which in turn is provided with a recess to receive the cutter '71 and which is firmly secured in said recess by means of the inclined surfaces of said collet being engaged and pinched together by corresponding inclined surfaces of the inner end of said spindle 69, said engagement of the inclined surfaces being effected by reason of a lead-screw 72, entering abore of the outer end of the spindle and engaging a suitable thread of a corresponding recess 73 of the collet before mentioned.

It will be obvious from the construction thus far described that to effect the firm clamping of the cutter within the spindle the attendant simply inserts said cutter into the recess of the split end of the collet, after which the screw 72 is turned with a suitable wrench, whereupon said collet is drawn inward, thus firmly clamping said cutter therein. .The spindle 69 is journaled in boxes 7% and 7-1, which are housed in uprights T5 of the movable carriage 76. The box 74 is provided with. a suitable chip-guard 7 7, which extends inward over the top of the cutter 71. Said spindle 69 is provided with a belt-pulley 78, which is firmly secured thereto by means of a set-screw 79, said pulley being connected and driven by the belt of the before-mentioned pulleys 14.

ltlechmrism for 111 om'ng and Adjusting the .MiZZing-Heads.

The carriages 76 of the cutting-heads above described are provided on their under side with dovetail ways 81, cut at a right angle to the spindle and into which fit corresponding dovetails S2 of the slides 83. This construction permits to said carriages a cross movement 011 said adjustable slides. The adjustable slides83 are fitted on the top of the frame 5 and made radially movable thereon by means of a grooveSi in each side of said slide, which groove snugly fitsinto suitable tongues of the intermediate plates 85, screwed to the top of frame 5.

\Vithin the carriage 7 6 (see Fig'. 13) is firmly secured a dependingpin 86, which extends through an orifice S7 in the adj ustable slide .83 and through a second orifice SS in the top ing tap in the face of the frame '5, the outer end of said screw being provided with a shouldered square head 93,whereby the same is engaged and turned with a suitable wrench. Adjacent to said head I firmly clamp a suitable collar 94, a portion of the peripheral face being finished flush with a plate 95, secured to the slide 83. These adjoining faces or peripheral surfaces 96 may be provided with suitable graduation marks, whereby the amount of turning of the screw 90 and its collar or pointer 91-will be easily determined, and whereby the several screws and the cutters may be accurately adjusted with relation to each other.

In connection with the adjusting operation I preferably employ a tool provided for the purpose by placing the same against thepost 97 of the table and between the cutters to be adjusted, then turning said screw until the cutter isbrought up against. the tool, which accurately indicates the space between the two points of engagement.

From the above it will be obvious that the cutters may be easily adjusted for the differare engaged there by, move freely therein with said adjustment.

llfecham'sm for Removing the Hubs.

The mechanism whereby the hubs are automatically removed from the holders after they have been properly milled will be best understood with reference to Figs. 1, 3, 8, and 2t to 33, inclusive. In order to properly support the gripping-head F and mechanism for operating the same, I provide a suitable framework 0, consisting of three

parts

100, 101, and 102.

The part 100 serves as the main support and is provided with a flange 103, which fits upon the top of the frame 5 and is secured thereto by means of screw-bolts, as shown. Beneath the section 100 is bolted the cylindrical section 101, which is suitably cut away, (see Fig. 8,) as at 104, to admit of the introduction of the driving-gear onthe vertical shaft A, before mentioned. Said gear 105 meshes with and drives a gear 106, secured to the shaft 107, journaled within the several sections of the frame 0, above mentioned.

Secured to the lower'end of the shaft 107 is a groove-cam 10S, around which I fit an intermediate cup-shaped piece 109, and through the side thereof I insert a pin 110 to engage the groove of said cam 108 and a vertical slot 111 in the before-mentioned cylindrical section 101. tent vertical movement to said piece 109 with the rotation of saidcam and its shaft, which movement is for the purpose of vertically reciprocating the rod 112, fitted in a bore of the shaft 107. To the upper end of this rod IIO This construct-ion insures a remit- L