US2073111A - Automatic machine - Google Patents

Description

March 9, 1937. F. LINDGREN AUTOMATIC MACHINE Filed Aug. 6, 1935 7 Sheets-Sheet l & vg

INVENTOR. FERDINAND L/NDGREN BY W R La -kw ATTORN March 1937. F. LINDGREN AUTOMATIC MACHINE Filed Aug. 6, 1935 7 Sheets-Sheet 2 INVEN TOR. FERDINAND L/NDGREN BY W-Q- A TTORNE March 9, 1937. F. LINDGREN 2,073,111

AUTOMATIC MACHINE Filed Aug. 6, 1935 7 Sheets-Sheet 3 INVEN TOR. Fseo/mA/o L/NDGEE/V March 9, 1937. F. LINDGREN AUTOMATIC MACHINE Filed Aug 6, 1935 7 Sheets-Sheet 4 March 9, 1937. F-. LJNDGREN AUTOMATIC MACHINE 7 Sheets-Sheet 5 Filed Aug; 6, 1935 INVENTOR. FERDINAND L/NDGEEN BY Niko ATTORNEYX Patented Mar. 9, 1937 UNITED STATES PATENT OFFICE AUTOMATIC MACHINE I Ferdinand Lindgren, Cincinnati, Ohio Application August 6, 1935, Serial No. 34,969 26 Claims. (01. 2 8) plurality of horizontal and/or vertical tool spin- This invention relates to automatic machinery, and particularly to multiple spindle machinery generally termed automatic drilling and tapping machines, but which are adapted to drill, counter-bore, tap, screw, counter-sink, ream, form,

spot, spin, and perform divers other machining operations.

A number of multiple spindle machines have been proposed in the past, and a number of these 10 have had a considerable commercial success,

however, practically all of these were limited to operating upon only one or two sides of the work unless very costly work carriers were provided with complicated mechanisms adapted to turn 16 the'work on the work carrier between successive machining stations.

It is an object of the present invention to provide a compact yet highly efiicient machine adapted to perform various machining operations on two or more than two sides of the work and even on directly opposite sides of the work without turning the work on the work carrier.

It is another object oi! the present'invention to provide an automatic multiple spindle-machine adapted to be quickly tooled for a small number of machining operations, and for a very large number of operations.

It is a further object of the present invention to provide an automatic multiple spindle machine which may be easily and quickly changedin setup for machining diil'erent pieces of work. In the past many machines of this type were single purpose machines which necessitated a complete factory rebuilding in order to change over from ing one or all the machining tools.

It is another object to provide a machine adapted to support and drive one or more auxiliary machining tools.

In the accomplishment of these objects various I novel features of construction were developed,

and among these is the provision of a novel' work carrier; a distinctive mechanism for indexing and locking the work carrier; vertical and horizontal tool heads which are interchangeable 30 and equally operative on two sides of a work 55 one, two, three, and four-way movement to it dies; and, a number of coadiutant and auxiliary tool spindles radially about the work carrier, and

r a simple cooperating driving mechanism.

Other features and advantages will appear hereinafter.

In the drawings:

Figure 1 is a small-scale general view of the entire machine provided by the present invention.

Fig. 2 is a longitudinal vertical section of the upper part of the machine.

Fig. 3 is a top view of the machine.

Fig. 4 is a detail of the tool spindle driving means.

Fig. 5 is a horizontal section within the base, toshow the slow speed and reciprocatory main drive shaft, taken on line 5-5 in Fig. 2.

Fig. 6 is a horizontal section within the base, showing the high speed and rotatory main drive shaft, taken. on line 6-6 in Fig. 2.

Fig. 7 is a detail of the indexing mechanism in the fully advanced position.

Fig. 8 is a fragmentary view of the parts shown in Fig. 7 as viewed from the top.

Fig. 9 shows the parts and condition disclosed in Figs. 7 and 8 viewed from another side.

Fig. 10 is a view similar to Fig. 7 but shows the parts in the returning condition.

Fig. 11 is a fragmentary top view of the parts and condition shown in Figl 10.

Fig. 12 is a view similar to Figs. 7 and 10, but shows the feed arm in the fully returned position.

Fig. 13 is a fragmentary view of the parts and condition shown in Fig. 12.

Fig. 14 is a detail view 01 the slow speed and two-way spindle drive mechanism.

Fig. 15 is a modified form of the spindle drive shown in Fig. 14.

Fig. 16 is a detail view of the high speed unidirectional drive for the tool spindles.

I Fig. 17 is a top view of the vertical tool head.

Fig. 18 is a sectional view taken through the .center of the vertical tool head.

Fig. 19 is a rear view of the vertical tool head shown in Figs. 17 midi-8:"-

Fig. 20 is an exploded view of the drive spindle mechanism for the tool heads.

Fig. 21 is a top view of the triple tool head auxiliary unit.

Fig. 22 is a rear view of the triple tool head unit shown in Fig. 21. I

Fig. 23 is a rear view or the single tool head auxiliary unit shown in Figs. 20 and 24.

Fig. 24 is a top view of the single tool head unit shown in Fig. 23.

The machine of this invention, in its present preferred embodiment, comprises a base 38 having a substantially hollow, vertical chamber 3|, integral transmission box 32, and a preferably integral table 33 rotatably supporting a work carrier 34 to move pieces of work 35 to various operative stations on the machine.

Work carrier The work carrier 34 provided by the present invention is of novel construction and should be particularly noted, for the same work supporting table 36 may be arranged to rotate with the work 35 or to be stationary while the work is slid thereover, and with the latter arrangement is adapted to eject or clear the pieces therefrom.

The work carrier 34 comprises an annular index ring 31 provided with any desired number of index apertures 38 (18 in the present instance) rotatably supported in a channel 31' in the table 33 and having a standard 39 extending upwardly therefrom, either integral therewith or, as shown, made separate and secured thereto by screws 39', with a base section thereof overlying the apertures 38 and the inner edge of the channel 31' to prevent chip trouble. Exteriorly of the index ring 31 there is provided a stationary ring 40 secured to the table 33 by screws 40 and preferably having its base extending over the annular index ring 31 to hold the latter in the channel 31' and to prevent chips from entering the channel. An annular work table 36 overlying the top of the stationary ring 46 and overlying a flange 4| on the standard 39 is provided with inner and outer sets of holes 42 and 43 respectively to accommodate one set of screws 44. An annular work locator plate 45 overlies the work supporting table 36 and is secured to the standard 39 with a set of screws 45' to be rotatable with the index ring 31 and standard 39, and is provided with a series of pockets 46 (36 in the present instance, double the number of index apertures 38) to locate pieces of work 35 properly relative to the tool spindles while'the standard 39 and work table 36 locate the work in proper. position vertically.

When the set of screws 44 is passed through the inner set of holes 42 and secured to the flange 4| on the rotatable standard 39 the work table 36 is rotatable with the locator plate 45 and the work is manually loaded and unloaded.

If the same set of screws 44 is passed through the outer set of holes 43 and secured to the stationary ring 40, the work locator 45 alone rotates and slides the pieces of work 35 arcuately thereover. This latter construction is advantageous when it is desired to unload the work carrier 34 automatically. To this end the invention provides removable section 41 in the work table 36 just short of the loading station to permit the pieces of work 35 to drop downwardly out of the locator 45 .into a chute 48, thence into a box or into a work conveyor. Thus, the operator need only load the work carrier and need not unload it.

If preferred, and as will be understood by persons in the art, the index ring 31, standard 39, work table 36, and locator plate 45 can be made integral and notched to receive only one type of work; or may be made integral, except for the locator plate 45 and work table 36 which may be made either separately or integral, and the latter Indexing and locking Indexing and locking of the work carrier 34 in predetermined arcuate or machining stations is, in the present preferred form of the invention, accomplished by a feed arm 49 which is at its lower end pivotally mounted on a stud 50 to the base 30, and at its upper end provided with a finger 5| adapted to cooperate with successive index apertures 38 in the index ring 31 as shown in Figs. 7 and 12 when the feed arm is moved from the advanced to the retracted position, and to engage the aperture and index the ring one station to the position shown in Figs. 7 and 8 as the feed arm is moved into advanced position.

Movement of the feed arm 49 from retracted to advanced position is effected by a cam 52 on a slow speed shaft 53 engaging with a roller 54 on the arm 48 adapted to permit the arm to be pulled into the retracted position shown in Figs. 12 and 13 by a spring 54' connected to the arm 49 and to the 'base 30, as permitted by the low point of the cam and is urged from this retracted position into the advanced position shown in Figs. 7, 8, and9 by the high point of the cam as the latter rotates. The finger 5| is secured to a stud 55 and the latter is capable of both pivotal and reciprocatory movement in bearings 55' on the arm 49. As viewed in Figs. '7, 10, and 12 it is normally moved ina clockwise direction by a flat spring 56 and is urged against the side wall 49' by another flat spring 51. These springs permit the finger 5| to be rotated in a counter-clockwise direction as the arm swings from the advanced to the retracted position as shown in Fig. 10 until the top end of the finger engages the next succeeding aperture, whereupon it snaps into the position shown in Figs. 12 and 13 while the spring 51 allows the stud 55 and finger to be reciprocated toward the other side wall 49' as the engaged aperture moves toward the center of the base in its relation with the pivot stud 50.

of the arm 49 as will be apparent by viewing Fig. 13 first, then Fig. 8.

Holding and locking the work carrier 34 in advanced position is accomplished by two mechanisms. A stud 58 backed by a spring 59 and riding on the index ring 31, see Fig. 2, is adapted to frictionally hold the index ring in advanced position so that the finger 5| as it slides toward the retracted position, as shown in Fig. 10 will not retract the ring. Although it is possible to effect the arcuate step by step rotation of the work carrier by the arm 49 and finger 5| and hold it in advanced position by the frictional holding stud 58, as just described in detail, in its preferred form the present invention provides additional mechanism adapted to positively align and lock the carrier in its successive working stations. This latter mechanism comprises moves against the roller 64 and pulls the inter connected plunger 6I downwardly out of engagement with the associated aperture and out of the path of travel of the ring 31 when the feed arm 48 and associated finger 51 are moved toward or into the retracted position, and during initial movement of these toward the advanced position.

As the work carrier 34 approaches the next successive station, the low point of the cam 85 moves toward the bottom. of the shaft, and permits the spring iii to push the plunger into the aperture 38. Thus, the ring is positively located. Should the feed arm advance the ring slightly too much or too little, the plunger automatically takes care of this discrepancy.

It is within the purview of this invention to use notches and other like mediums cut into the index ring; however, in order to improve the wearing qualities, and to make possible the replacement of the wear point, it is preferred to provide circular holes with bushings 38" set therein.

Because the feeding mechanism, and the'locking mechanism for the work carrier are operated by the one drive shaft on which the cams 52 and 65 are rigidly'secured in fixed relation, and since both these mechanisms feed and look through engagement with the same index apertures 38 on the work carrier 34, a novel, positive, and a very effective indexing and locking is provided by the present invention. I

Tool heads It should be particularly noted that the present invention provides, supports, and drives a large variety of tool spindles at various arcuate positions both interiorly, exteriorly and above the annular work carrier 34.

Horizontal tool heads 86 (see Figs. 2, 3, 4, 15, and 16) are provided by the present invention which are equally adaptable for location and operation inside of the work carrier, for example tool heads A and B, or exteriorly thereof, for example the tool heads C, D, E, and F, and are capable of imparting one, two, three, and fourway motion to the tools carried thereby, whether they be interiorly or exteriorly of the work carrier. Screws 61 engaging threaded holes 61 secure the tool heads to the table 33 and 33'.

In general the horizontal tool heads 68, best seen in Figs. 2 and 3, each comprises a housing 88 with suitable channels 88 and plates 88' adapted to receive a tongue 18 on tool slides II and to guide the latter in limited reciprocatory movement. As shown, each slide is provided with a pair of hollow tool spindles 12 adapted to receive the tapered shank of desired tools, for example, a tapered shank 13 of the drill chuck I3 as shown in Fig. 2. A flange I4 at one end of the spindle, and a long gear 15 at the other end, holds the spindle in the slide. If preferred, these spindles may be yieldingly mounted in any of the usual methods. A knock-out hole I2 facilitates removal of the tools carried by the spindle. The slide itself provides a satisfactory bearing for rotatably supporting the tool spindles;

A large gear 18 meshing with the small gears 15 rotates the tool spindles. A tongue and slot connection l1 permits use of the same large gear 18 with pulleys l8 and I8 of the heads A and E, and with gears 88 and 8i of the heads B and F respectively as shown in Fig. 20.

Reciprocation of the tool slides II toward and from the work 35 transported by the carrier 34 is, as at present preferred, accomplished through the provision of a bell-crank 82, pivoted ona stud 83 extending between the side walls of the housing 68 and having a gear sector 84 meshing with 4' operable interiorly and exteriorly of the work carrier; for example, a'tool head G adapted to drill the pieces of work 35 and head H adapted to tap vertically. Screws 88 engaging threaded holes 88 securethe vertical heads to the table 33 and 33' interiorly or exteriorly of the work carrier 34. I n These vertical tool heads 88 in their present preferred form each includes a main frame 8| having a set of pillars adapted to receive and support a slide 83 for vertical movement. slide carries a long gear. 84 and through arms 85 adjustably supports a plurality of vertical tool spindles 86 having gears 86' at their upper ends and supporting an intermediate gear 81 on fingers 81. The tool spindles 88, gears 88' and 81 are brought into operative relation with the work and with the long driver gear 84 and are held there by lock screws 88.

One-way and two-way rotation of the tool spindles is accomplished by the drive shaft 88 and bevel gear 88 meshing with a cooperating bevel gear I88 at the lower end of a vertical shaft I88 and through a large gear I8 I on this same shaft meshing with the long gear 84 just described. Reciprocation of the spindle carrying slide 93 is, as may be seen best in Fig. 18, accomplished through a cam I51 moving a connector rod I82 vertically ina bearing I83 by a finger I84 secured to the top-end thereof while the latter raises a stud. I85 and the associated slide or allows it to move downwardly. A thread and nut connection I86 provides a vertical adjustment for the slide 83.

Driving mechanism The novel driving mechanism provided by the present invention, in its presentpreferred form, comprises only one high speed main drive shaft I88, hereinafter referred to as the rotatory drive shaft, and only one slow speed main drive shaft 53 hereinafter referred to as the reciprocatory drive shaft, adapted to impart one, two, three, and four-way movement to the individual tools, to index and lock the work carrier and to perform divers other operations in a manner about to be described in detail.

The rotatory drive shaft I88 is supported in the bearings I89, H8, and III in the'web H2, and side walls 48' and I II respectively of the base 38, and in the present form has a large gear I I3 and small gear II4 secured at one end, and a small bevel gear II secured at the other end to limit endwise movement, and has a pair of pulleys H8 Theand Ill and a bevel gear Il6.secured near the center thereof. An electric motor II6 suitably secured to the base, has a gear I meshing with the large gear II3 to impart high speed rotation to the rotatory shaft I06.

One-way movement, (e. g. rotation for drilling) may be imparted to tool spindles internally, externally, and vertically relative to the work carrier by the one rotatory drive shaft. The internal tool spindles 12 on the tool head A are given uni-directional movement through a belt connection I2I between the pulleys 16and II1, the former being associated with and imparting rotation to the gears 16 and 16. By merely replacing the pulley 16 with the pulley 16' upon a slightly longer stud (see Fig. 20) the head A may replace the head G externally of the work carrier as is clearly shown in Fig. 16 wherein a pulley H1 is on the outer end of the shaft I06 and the belt I2I used exteriorly of the base.

The tool spindles 96 on the vertical spindle head G, as shown, are rotated by a belt connection I22 extending between the driving pulley I23 on the rotatory shaft to the driven pulley I24 on the tool head, the latter through the shafts and gears previously described imparting unidirectional rotation to the associated tool spindles.

Thus, it will be seen that the one rotatory drive shaft I06 is adapted to impart a high speed one-way movement to both the horizontal and the vertical tool spindles internally, externally, and vertically above, (viz, on three sides) of the work.

The main drive shaft I06 may also be used to drive a conventional hopper mechanism supported in any suitable manner above the center section of the table, for example through a suitable belt connection extending from the pulley II6 on the rotatory shaft upward through the central open ng I25 to a pulley on any conventional hopper mechanism.

The reciprocatory drive shaft 63, so called because it is used mostly to translate rotation into reciprocatory movement, is also supported similarly to the rotatory shaft in bearings I26, I21, and I26, in the web H2, and side walls 49' and 51. This-rec procatory shaft supports a number of gears and cams which may be best described individually. At the left side, as viewed in Fig. 2, it is provided with a large gear I29 meshing with a small gear I I4 on the rotatory shaft I 06 in order to be driven by the latter at a considerably reduced ratio.

Two-way rotation of the spindles 12 and 66 in the horizontal and vertical tool heads 66 and 63 respectively, both internally and externally of the work carrier 34 is accomplished directly from the one reciprocatory drive shaft 63 with several novel forms of mechanism provided by the present invention. One form applied to a horizontal tool head 66, but equally applicable with the vertical head 60,'is shown in Fig. 15. It comprises a rocker member I30 pivoted on a stud I 3| with a pitman connection I32 on a rod I33 at its lower end including a bearing block I34 carried by a driver block I36 on the outer end of the reciprocatory shaft 63. A chain I36 meshing with a sprocket I31 on the tool head is secured to the rocker member I30 with a clamp plate I33 and spring connection I36. As the shaft 63 rotates the driver block moves from the solid line to the dot-and-dash line position shown in Fig. 15 to oscillate the rocker member and to rotate the sprocket I31, and the associated gear 16.v gears 16 and spindles 12 in right hand and left hand direction of rotation. The chain provides a very silent drive.

A similar but more economical two-way drive mechanism is shown in Fig. 14, (applied in Figs. 2, 3, i7, 18, and 19) which includes the same pitman connection I 32 but provides a modified rocker member I30 with an integral or attached gear segment I40 adapted to mesh with gears, for example gears 60, 6|, and I, to drive associated spindles 12 and 66.

The tool spindles 12 carried by the internally located tool head B are given two-way rotation through the provision of a driving connection I42 including a rack I43 meshing with a small gear 60 on the stud 60' while a block I44 also pivoted on the stud forms a reciprocatory bearing for the rack and maintains it in peripheral spaced relation to the gear thus permitting the entire rack to be oscillated slightly about the stud. At its lower end the rack is connected to a fork I46 having an elongated slot I46 riding vertically on the shaft 63 and having a roller I41 riding on a cam I46 carried by the reciprocatory shaft. As the high point of the cam is rotated toward the top of the machine it works against the roller and raises the rack vertically relative to the gear 60 and thereby imparts one-way rotation to the spindles 12 through the gear 16 and associated gears 16 and 60. And as the cam moves toward the bottom of the machine, a roller I46 aflixed to the lower end of the fork is pushed downwardly and thereby causes the rack through the gears to move the associated tool spindles in the other direction. This entire type of two-way spindle driver may be used with equal facility on the exterior of the machine (for example, to drive the externally located horizontal tool head D or the vertical tool head H) and may be used on the vertical tool head when the latter is placed within the work carrier ring without change either to the two-way driver or to the tool head.

Two-way reciprocation of the horizontally disposed tool slides H and associated spindles 12 in the tool heads 66, for example the internally located tool head B, is accomplished by a connector I60 secured to the arm 66 on the bell crank 62 including a forked plate I 6| embracing the reciprocatory shaft 63 and with a roller I62 resting upon a cam I53. A roller I64, or some equivalent means, may be used to pull the connector I60 down and associated slides 1I back. The cam I63 moves the forked plate I6I vertically up and down through-a limited range of movement, and imparts arcuate movement to the bell crank and reciprocatory movement to the tool spindle slide. The same cam, forked plate, and connection I63, I6I, and I60 may be located between the bearings I26 and I23 and may be used to drive a horizontal tool spindle head 66 exteriorly of the work carrier, for example if the tool head B was placed on the table in the location of the present vertical tool head G, the same connector I60 except for an offset forked arm I6I' may be used for the head A.

Plain two-way reciprocatory movement for the horizontally disposed tool spindles 12 is sometimes desirable; for example. when it is desired to have fingers on the tool spindles 12 move in onto a piece of work transported by the work carrier 34 to perform some light forming operation or, for example, to overlie the piece of work 36 in the carrier 34 to prevent it from being pulled out by the tools carried M the Vertical tool head as the latter are pulled from the work, and for various other like reasons. In such uses it is merely necessary to place and tighten a set screw I55 to prevent the spindles from turning and in such cases, of course, no rotatory driving connection is made.

Three-way movement of the horizontal spindles is accomplished by merely keeping the simple rotatory driving connection I2I or I22 or by keeping a similar slow speed one-way rotatory driving connection with the shaft 53 in combination with the reciprocatory driving connections just de scribed. Four-way movement to the horizontal tool spindles is accomplished through the provision of the reciprocatory driving connections just described in combination with the two-way rotatory drive of the rack I43 type, of the gear segment I40 type, or of the chain I36 type hereinbefore described.

Similar one, two, three, and four-way movement of the vertical tool spindles 96 internally and externally of the work carrier 34 is accomplished by the provision of a very similar connector I02 extending from the finger I04 to a forked plate I56 and to a cam I51 carried by the reciprocatory shaft and having a roller I58 engaging the cam I51. The vertical tool spindles may be locked against rotation by tightening set screws I59 thereagainst when it is desired to have plain two-way reciprocatory movement, of the tool spindles. Three-way movement is accomplished by combining the one-way rotatory drive,

between pulleys I24 and I25 with the reciprocatory drive. Four-way movement is accomplished by combining any of the two-way rotatory drives hereinbefore described in detail with the'recipro catory drive just described.

The motor I I9 connected to any suitable source of power with a switch in the usualmanner is adapted to drive the rotatory shaft at a high speed through the gear I20 on the armature shaft engaging the gear I I3 n the rotatory shaft and the latter through a small gear H4 and large gear I29 drives the reciprocatory shaft 53 at a slow speed; thus there is a coordinate driving relation between the rotatory drive shaft I08 and the reciprocatory drive shaft 53 in which high speed rotation of the tool spindles and reciprocation of the spindles, and indexing and locking of the work carrier 34, is accomplished in timed relation. Also, by connecting the pulley I24 to the reciprocatory shaft rather than the rotatory shaft, and shortening the belt connection I22, the spindles may be driven in one direction at a slow speed rotation.

The reciprocatory driving shaft 53 of the present invention thus provides a simpleyet highly efficient single means adapted to impart slow speed rotation to the tool spindles; two-way rotation to the tool spindles; impart two-way plain reciprocatory movement to the tools; impart both reciprocatory and slow speed rotatory movement; and to impart reciprocatory and two-way rotatory movement, to horizontal tool spindles interiorly and exteriorly and vertical tool spindles vertically relative to the work carrier.

This same shaft, and a pulley I60 thereon, may be used to drive an oil pump I6I through a belt I 6|, as shown. Further, the same pulley, or a similar one,may be placed on the shaft between the bevel gear I62 and collar I63 in order to drive a belt through the opening I25 extending to a hopper feed or like mechanism supported on the center section of the table 33,

Coadiutaat tools The present invention provides a novel arrangement in which additional tools are provided in closerelationshlp to the main drive shafts 53 and I08 and the tool head G. In the present preferred embodiment this novel arrangement comprises shaping the transmission box 32 so that the table extension 33 thereon extends arcuately on either or both sides of the main shafts to provide a support for either or both the horizontal and/or vertical tool heads 66 and 89. As shown in Fig. 3 particularly, the extension supports the two horizontal heads C and D for drilling and tapping respectively, but the vertical head 89 arranged to drill or tap may be used with equal facility at either station.

To this end the transmission box is provided with a set of bosses I65 (see Fig. 6) supporting intermediate gears I66 on studs I61 and other bosses I68 and I69 supporting coadjutant rotatory driveshafts I and gears I93 thereon, with extensions I10 adapted to receive driving pulleys similar to the pulley I23.

Higher in the same transmission box between bosses HI and I12 in the side wall III and cross web N2, the present invention provides a pair of coadjutant reciprocatory drive shafts I13 having beveled gears I14 on the inner ends thereof meshing with a main bevel gear I on the main reciprocatory drive shaft, to be rotated coordinately therewith, and having projections I13 extending on the outer ends thereof to receive driving pulleys or to receive the driver block I35 for the two-way rotatory drive. With this type of drive the shafts I13 rotate a diflerent hand than the main drive shaft 53. ,If preferred the shaft may be built up like the coadjutant rotatory drive shafts I10 with intermediate gears to provide like direction of rotation between the main and coadiutant reciprocatory shafts 53 and The projections I10 on the coadiutant rotatory shafts I10 may be provided with a pulley I23 and thereby impart high speed rotation to the spindles 12 of the heads C and D or an equivalent head, and the projections I13 on the coadjutant reciprocatory shafts may be provided with pulleys or crank-arms to impart slow speed rotationor two-way rotation to the tool heads overlying these stations. The table 33' (see Fig. 3) underlying the heads C and D, for example, is provided with apertures similar to the openings I64 to clear the bearing I03 of the vertical tool head 89 and the connector I50 of the vertical tool heads 66 so that the reciprocatory drives already described in connection wlththe horizontal and-vertical tool heads may be Connected to the coadjutant shafts I13 be'tw, th'e bosses m and m. Preferably th 'shjaits laresprovided' with the usual 1m cam during the initial assembly of the machine so that it is merely necessary to drop the forked finger down onto the shaft, as will be readily appreciated by anyone familiar with machine construction.

Thus, the present invention provides a plurality of coadiutant supports and driving mechanisms to make possible aplurality of coadjutant tool heads in group association with the main driving mechanism.

Auxiliary tools quent and complementary machining operations on the pieces of work transported by the work carrier 88. One of these auxiliary tools is best shown in Figs. 2, 3, 1'1, through 20, 23, and 24, and comprises what may best be termed single auxiliary transmission box I18 having a main frame I11 supporting an auxiliary rotatory shaft I18, auxiliaryreciprocatory shaft I18 adapted through tongue and slot connections I80 and I8I to mesh with intermediate rotatory and reciprocatory shafts I82 and, I88. Bolts I88 entering holes I84 in flanges I85 serve to connect the box I 18 or the like to the main base 88 of the machine. The intermediate shafts I82 and I88 through bevel gears I88 and I81 thereon, and cooperating bevel gears H8 and I82 on the main shafts I88 and 53 are adapted to impart rotation to the intermediate auxiliary shafts I82 and I88.

when this auxiliary transmission box is secured to the frame, either the horizontal or the vertical tool heads 88 or 88 may be secured to the top thereof, shafts I18 and I18 associated with shafts I82 and I88 are capable of imparting one, two, three, and four-way movement to the spindles carried thereby in exactly the same manner as has already been described in connection with the main and coadjutant machining stations.-

Interiorly of the box I18 the shaft I18 is provided with the previously described lift cam and is provided with a cutout previously described, or I88, (Fig. 24) to make possible the reciprocatory drive to the tool head. A cover plate I11 on the bottom facilitates assembly within the box and keeps the oil and grease therein.

0n the side of the machine opposite the main transmission box 82 there is shown a triple station auxiliary transmission box I88 including a frame I88 adapted to be secured to the flanges I88 with screws I88. In general it embraces the principles of the main transmission box 82 and the auxiliary transmission box I18 last described, differing only in the provision of a removable three station table I88 thereon adapted to receive three tool heads 88 and/or 88 and in the provision of a self-contained driving mechanism for the three tool heads. This triple auxiliary transmission box may best be seen in Figs. 1 through 6, 21 and 22. This box is provided with central bearings I8I and I82 adapted to receive the auxiliary rotatory and reciprocatory shafts I18 and I18, like those in the single auxiliary unit I18 with the same tongue and slot connections I80 and III adapted to engage with and be driven by the main rotatory and reciprocatory drive shafts I88 and 58. Further, the box is provided with holes I8I' to receive the crank stud I8I of any of the three forms of two-way driving mechanisms hereinbefore described, and provided with a top center opening I88 adapted to clear the bearing I88 or the connector I50 of the reciprocatory drive mechanisms for the tool slides. The pulley I28 on the end of the intermediate rotatory shaft I18 may be used to impart unidirectional high speed rotation to the tool spindles if preferred.

The auxiliary transmission box I 88 (Figs. 21

and 22 particularly) also provides secondary bearings HI and I12 adapted to support auxbearings I88 and I88 and also bosses I adapted to receive and support an exact duplicate of the coadjutan't rotatory gears I83 and shafts I10 and intermediate gears I88 respectively, best seen in Fig. 6. It includes secondary holes I84 in the top table section thereof to provide clearance for the bearing I08 and connector I50 of the tool slide reciprocating mechanisms. The shafts I18 and I18 may be provided with the lift cams and associated mechanism as already described. The various parts are preferably assembled within the box through an open- ,ing I85 in the bottom thereof. Afterwards the box is sealed with a plate I88 which, in effect, transforms the box into a grease or oil tight compartment in which the various parts may run.

This same triple auxiliary unit may be secured to the flanges I85 opposite the loading station as shown by the dot and dash lines I81 in place of the single unit. It will be apparent to anyone skilled in the art that a double u'nit, rather than the single or triple auxiliary unit may be made. It is also within the purview of this invention to have the transmission boxes I18 and I88 or two of the boxes made integral with the base 88 so that the machine is also provided with a large number of radiating tool stations exteriorly of the work carrier.

However, the auxiliary units and the method of interchangeability provided by the structure of the present invention represents a much more advantageous structure since it is possible to considerably clear the spaces around the machine and to cut down the working load on the motor. In addition to the foregoing it is also possible to add special machining tools radically different from the tool heads hereinbefore described onto the machine and still have good support and a driving mechanism therefor.

Adjustment of the reciprocatory drive of the various vertical and horizontal tool heads 88 and 88 is accomplished by thread and lock nut connections I88 on each. A door I88 on the side of the base 88 facilitates adjustment, repair, and assembly of parts within the base.

Operation The motor H8 is started whereupon the shafts I88 and 58 are driven and the latter through the cams 82 and 85 oscillates the index arm 48 and reciprocates the plunger 8| to effect a step by step arcuate movement of the work carrier 88 to the various machining stations. The operator loads pieces of work into the carrier to the right of the chute 48. As the pieces of work are indexed to the station adjacent the head C, the drills 200 carried thereby, rotated and reciprocated by the mechanism hereinbefore described, are moved in to drill holes 20I in the pieces of work; in the next station the drills 288 carried by the head A are rotated and reciprocated to drill holes 208 in the pieces of work.

In the next station the taps 285 are reciprocated and given two-way rotation to rough tap the external holes 20I. In this and in the preceding station the vertical spindles 86 are rotated and reciprocated to move drills 288 down into the pieces of work and form vertical holes 201 in the work. When the pieces of work are adjacent the tool head H, the taps 208 are reciprocated and rotated to tap the vertical holes 201, and when adjacent the head E the drills 288 are moved in to counter-sink the holes 28I. When the work is adjacent thehead F the taps 2I8 are given movement to finish tap the holes 2!. In this same station the taps 2H are given movement to thread the holes 204 internally relative to the work carrier. As the work carrier moves the work above the chute 48 the pieces drop by gravity downward into chute 48 if the work table 38 is secured to the stationary ring 40 and the section 41 is removed therefrom. When the section 41 is not removed, and when the table 38 rotates with the locator plate 45, the pieces of work are removed manually.

During these machining operations the main rotatory and reciprocatory drive shafts index and lock the work carrier in a step by step manner and also impart the rotatory and reciprocatory movements to the horizontal and vertical tool spindles I2 and 96 carried by the tool heads A, B, and G in exact timed relation relative to each other. At the same time the main drive shafts 83 and I08 through the coadiutant drive shafts I13 and H8 impart three-way and four-way movement to the tool spindles I2 in the tool heads C and D in exact timed relation with the movement of the work carrier and the tool heads A, B, and G.

Because the tool heads H, E, and F supported by the auxiliary transmission boxes, I16 and I88 have a mechanical connection with the main drive shafts Hi8 and 53 through the tongue and slot connections I88 and IN, these heads are also driven in exact timed relation with the work carrier 34 and the tool heads A,- B, C, D, and G. It will be appreciated readily that with the structures of this invention various other combinations of tools or machining operations may be mad".

It is within the purview of this invention to make the various types and the variously conditioned and located tool heads, and also the coadjutant and auxiliary supports and driving mechanisms, hereinbefore described in detail, integral with or substantially integral with the main base 30 although this represents a much less advantageous machine because it would in effect make but a singlepurpose machine and one of the greatest and most important advantages of the preferred and shown embodiment is that it is widely interchangeable and that the machine itself can be greatly reduced in size in certain set-ups to facilitate working around it.

Also it will be understood readily that the tool heads 66 and 89 may be reciprocated by expedients other than the cams shown, and may each be provided with but a single tool spindle I2 and 96 respectively or only one of each of .the two spindles in the individual tool heads provided with tools in which event the number of work carrying pockets 46 will equal the index amrtures 38. Thus, the machine in general as hereinbefore described may be used to fabricate large or very wide pieces of work.

Other variations and modifications may be made within the scope ofthe present invention. and portions of the improvements may be used without others.

I claim:

1. In a device of the character described, the combination with a base, of an annular work carrier; tool spindles interiorly, and exteriorly of said annular work carrier; at least one high speed drive shaft extending radially from the vertical center of the base and work carrier; at least one slow speed drive shaft extending radially from the vertical center of the base and work carrier; and means associated with said high and 7 low speed drive shafts adapted to impart one and reciprocatory movement and also one and twoway rotation to said tool spindles interiorly, exteriorly and above said annular work carrier.

3. In a device of the character described, the combination with a base, of an annular work carrier; tool spindles interiorly, and exteriorly of said annular work carrier; spindle driving connections and only two main drive shafts adapted to impart one and two way rotation and to impart reciprocatory movement to said tool spindles.

4. In a device of the character described, the combination with a base, of an annular work carrier; tool spindles interiorly, exteriorly, and

above said annular work carriehsplridl driving connections and only two main'drive shafts associated with said driving connection adapted to impart reciprocatory movement andalso one and two way rotation to said tool spindles interiorly, exteriorly and above said annular work carrier.

5. In a device of the character described, the

combination with a base, of an annular work carrier; three motion tool spindles supported by said base interiorly and exteriorly of said workv carrier; at least one high speed drive shaft extending radially from the vertical centerof the base and work carrier; at least one slow "speed drive shaft extending radially from the vertical center of the base and work carrier; and means associated with said high and low speed drive shafts adapted to impart three motion operation to said interior and exterior tool spindles.

6. In a device of the character described, the combination with a base, of an annular work carrier; four motion tool spindles supported by said base interiorly and exteriorly of said work carrier; at least one high speed drive shaft extending radially from the vertical center of the base and work carrier; at least one slow speed drive shaft extending radially from the vertical center of the' asev and work carrier; andrneans associat said; l,high; ;and low "speed drive seda te -i j to said interior. and exterior i001]- 7. In aQdevice/o th character described, the ase; ofa1 g'rotatable. work combination wit carrier; radially arranged too spindles; a high speed main drive shaft; auxiliary drive shafts associated with said main drive shaft-and-radiating therefrom; and driving connections between said radial tool spindles. and said radiating auxiliary shafts.

8. In a device of the character described, the

combination with a base; of a rotatable work carrier; radially arranged tool spindles; a speed main drive shaft; .9, slow speed main drive shaft; auxiliary drive shafts associated with said high and slow speed main drive shafts and radiating therefrom; and driving connections between said tool spindles and said radiating auxiliary shafts adapted to impart rotatory and reciprocatory movement to said tool spindles.

9. In a machine of the character described, the combination .with a base; of a rotatable work carrier; a tool spindle; indexing mechanism; a pair of main drive shafts; and means on said pair of drive shafts adapted to coordinately operate the indexing mechanism and to impart three-way movement to the tool spindle.

10. In a machine of the character described, the combination with a base; of a rotatable work carrier; a tool spindle; indexing mechanism; a pair of drive shafts; and means on said pair of drive shafts adapted to coordinately operate the indexing mechanism and to impart four-way movement to the tool spindle.

11. A machine of the character described; having in combination with a base; an annular work carrier; indexing mechanism; internal and external radial tool spindles; a pair of main drive shafts; and means on said pair of drive shafts adapted to operate the indexing mechanism and to impart three-and/or four-way motion to the tool spindles.

12. In a machine of the character described, the combination with a base having a plurality of arcuately arranged work stations; of a rotatable work carrier; tool spindles; means for indexing the work carrier; a single driving means adapted to concurrently operate the tool spindles and the indexing means; and heads adapted to support the tool spindles for rotatory and reciprocatory movement, said heads being adapted to be mounted at various arcuate work stations adiacent the rotatable work carrier, and in operative relation to the driving means.

13. In a machine of the character described, the combination with a base having a plurality of arcuately arranged work stations, of an annular work carrier, rotatably supported upon the base; tool spindles; driving means; heads adapted to support the tool spindles for rotatory and reciprocatory movement, said heads being adapted to be mounted at various arcuate work stations exteriorly and/or interiorly about the annular work carrier and in operative relation to the driving means.

14. In a machine of the character described,

. the combination of a base having a table-like top; an annular work carrier rotatably supported upon the base; and tool spindle heads adapted to support the tool spindles for rotatory and 'reciprocatory movement, said heads being adapted to be mounted upon a table-like top exteriorly and/or interiorly of the annular work carrier and at various arcuate work stations about the rotatable work carrier.

15. In a device of the character described, the combination with a base, of a plurality of tool spindles; a rotatable indexing ring; a standard on said indexing ring, a stationary ring; a work table secured to said stationary ring; and a work locator on said standard, overlying said table, and rotatable with the support on the indexing ring, and capable of sliding work located thereby over said table.

16. In a device of the character described, the combination with a base, of a rotatable indexing ring; a standard on said indexing ring; a stationary ring; a table on said stationary ring, having a gap therein; a work locator on the standard, and rotatable therewith; and a chute underlying said gap, allowing work to drop from the locator and table as the locator moves the work across the table into a position over the 88p.

17. In a device of the character described, the con tfiination with a base, of a rotatable indexing ring; a. standard on said indexing ring and rotat-- able therewith; a stationary ring; a work locator on said standard and rotatable therewith; and a work table underlying said locator capable of securement to the stationary ring so that work is moved over the top thereof during rotation of the locator and capable of securement to said standard for rotation with the latter, and with the locator.

18. In a machine of the character described, the combination with a base, of a rotatable work carrier, having a plurality of apertures therein; an arcuately movable arm pivotally connected to a support; means adapted to arcuately move the arm; and an arcuately movable finger on said arm, adapted to engage in successive apertures of the work carrier and rotate the latter when the arm is arcuately moved in one direction and adapted to move clear of the engaged aperture and across the under side of the work carrier into a next succeeding aperture when the arm is moved in the other direction.

19. In a machine of the character described,

the combination with a base, of a rotatable work carrier, having a plurality of apertures therein; a movable member; mechanism for automatically moving said member; and a finger on said member adapted to engage successive apertures in the work carrier and to arcuately move the carrier when the member is moved in one direction and adapted to moveclear of the engaged aperture and into a succeeding aperture when the member is moved in the other direction.

20. In a machine of the character described, the combination with a base, of a rotatable work carrier, having a plurality of apertures therein; a movable member; mechanism for automatically moving said member; a finger on said member adapted to engage successive apertures in the work carrier and to arcuately move the carrier when the member is moved in one direction and adapted to move clear of the engaged aperture and into a succeeding aperture when the member is moved in the other direction; and means adapted to support said finger for arcuatory and reciprocatory movement in the movable arm.

21. In a machine of the character described, having in combination with a base, of a rotatable work carrier; tool spindles; a feed dog adapted to arcuately advance the work carrier; a latch adapted to lock the work carrier in successive arcuate stations; means adapted to reciprocate the tool spindles; and a main drive shaft adapted to operate the feed dog, latch, and the tool spindle reciprocating means in timed relation.

22. In a machine of the character described, the combination with a disposed base; of a rotatable work carrier; internal radial tool spindles; external radial tool spindles; vertical tool spindles; a feed dog adapted to arcuately advance the work carrier; a latch adapted to lock the work carrier in successive radial stations; means adapted to reciprocate the internal, external, and vertical tool spindles; and a main drive shaft adapted to operate the feed dog, latch and the tool spindle reciprocating means in timed relation.

23. In a machine of the character described, the combination of a base; a rotatable work carrier having apertures therein; a feed dog engaging said apertures adapted to arcuately advance the work carrier; a plunger underlying the work carrier and engaging said apertures; and'a main drive shaft adapted to operate the feed dog and plunger in timed relation.

24. In a machine of the character described, the combination of a base; a horizontally dispa sed drive shaft; a cam on said drive shaft; a tool head on said base; a tool spindle; a tool spindie slide on said head; bell crank associated with the tool spindle slide; and a connector extending from the bell crank to the cam on the horizontally disposed drive shaft adapted to reciprocate the tool spindle slide.

25. In a machine of the character described, the combination of a base; tool spindles; a main support; a main drive mechanism providing a direct drive to tool heads on the main support; a coadjutant main support; and a coadjutant driving mechanism, associated with the main drive mechanism, adapted to drive the tool spindles on the coadjutant main support.

26. In a machine of the character described, the combination of a base; tool spindles; a. main support; a main drive mechanism; an auxiliary support; and an auxiliary driving mechanism in the auxiliary support, associated with said main driving mechanism, adapted to drive tool spindles on said auxiliary support.

FERDINAND LINDGREN.

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