US1627934A - Universal multiple-operation machine - Google Patents

Description

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L.. H. STEIN UNIVERSAL MULTIPLE OPERATION MACHINE Filed Sept. 8. 1924 1,6 Sheets-Sheet 16 HELE/75E OPEFHT/ON Patented May 10, 1927.

UTE STATESv PATENT OFFICE.

LOUIS II. STEIN, OF CHICAGO, ILLINOIS, ASSIGNOR TO STR-OMBERG MOTOR DEVICES COMPANY, 0F CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

UNIVERSAL MULTIPLE-OPERATION MACHINE.

Application filed September 3, 1924. Serial No. 736,419.

My invention relates to metal working machines for performing a series of operations such as drilling, counterboring, tapping, slotting, milling and the like, upon a piece or blank.

rlhe device of my inventionrela-tes to that class of machines which aretermed sem1- automatic machines. There are many articles or machine elements which require a number of different operations to be per formed upon them. Broadly, this has been performed heretofore by the turret lathe and screw machines where the article or element has an airis oit-rotation common to the various cuts which are made onor in it.

New where the article is of an irregular shape or contour, having no common anis of rotation with respect to the operations to be performed, such procedure .as is taught by the turret lathe is not available. I have, in accordance with the present invention devised a machine for performing the successive operations by a novel arrangement of cooperating mechanisms embodying, I believe, a new principle. I have `conceived the idea of carrying the piece or article through 4a definite path orcircuit, and performing successive operations at successive posit-ions.v t each position a different operation is performed and successive pieces proceed in regular fashion through the successive positions. The chucks or work holders may be permanently attached to the carrier and move through a` closed path or they may be detachable and the carrier or conveyor move through the closed path.` If

desired the carrier or conveyor may be divided in sect-ions fed in regula-r succession through the machine. The. real gist of the invention resides in the progressive-and continuous automatic advance in a series oi steps from station to station where successive opei tions'are performed.

The pieces are all operated on simultaneously and they all advance or are stepped forward simultaneously between operations. In order to do this most advantageously, the work upon the piece or article is so divided up that no one operation will take longer than another within limits, and the lower` limit as to time of operation is the time required for inserting a blank into the machine and taking out a linished'article or where two successive positions may be devoted to these two operations the lowerl limit is then the time required either for inserting the blank or for taking out the inished article during so much of the circuitas is devoted to inserting, changing, and removing the work.

This principle of dividing the work up into relatively short steps progressively carried on automatically at successive stations o-n di''erent centers and all perform simultaneously and within a common period of time, is, so far as I know, broadly new. The number ot operations that may thus be performed simultaneously is not limited to the number' of operations upon a common center or. from a. common direction. 'The operations may be extended to any desired number within limits.

In theembodiment which I have constructed and operated and herein illustrated, all of the operations are performed by cutting tools moved in the same direction to and from the work; that is to say, in this machine the spindles are all vertical and parallel. The principle may be extended to the performance of operations in two or more planes; that is tosay, the cutting tools may be set at different angular positions with respect to each other, all within the y broad teaching of the present invention. But in the machine which I have constructed and operated, I keep all the working heads in the same general position and to secure a cutting or forming operation upon the article in a different plane, I change the 4position of 4the work for operation in such different plane or direction. I also wish to point out that the machine is not limited to one man operation, but may bev extended to operation by more than one operator or attendant. In such case, the operations are again all timed so that all automatic operations are timed with to be coextensive and contemporaneous with the hand operations.

lNow while I have illust-rated a speciiic piece and a specific machine for operating upon the piece, it is to be understood that the principles of my invention are not restricted to the particular machine illustrated. nor to the work vupon the sneciie piece herein illustrated and described;

In the accompanying drawings I have illustrated a specic embodiment of my invention. o

lFig. l is a plan view of a machine embodying the invention;

Fig. 2l is a vertical section taken on the line 2 2 of Fig. 1 showing certain of the parts in elevation;

Fig. 3 is a horizontal section taken on the line 3 3 of Fig. 2;

Fig. l is an enlarged horizontal section taken on the line 4 4 of Fig. 2;

Fig. 5 is a similar section taken through the main driving shaft on the line 5 5 of Fig. 2;

Fig. 6 is a vertical axial section on an enlarged scale taken on the line 6 6 of Fig. 1;

Fig. 7 is a fragmentary section taken on the line 7 7 of Fig. 2;

Fig. 8 is a fragmentary elevational view 0f the clutch and cam control therefor, as viewed on the line 3 8 of Fig. 7;

Fig. 9 is a plan view of a cam collar for timing the operation of the working head;

Fig. 10 is a fragmentary horizontal section taken on the. line 10-10 of Fig. 6 illustrating the change speed gearing for controlling the timing of the cutting operation on the piece;

Fig. 11 is a similar view taken on the line 11 11 of Fig. 6 showing a different change speed gea-.ring for the same;

Fig. 12 is a plan view of the tim-ing cam for timing the advance of the work;

Fig. 13 is a fragmentary horizontal section taken on the line 13 13 of Fig. 6 showing a. third. arrangement of the change speed gears for controlling the operations on the piece;

Fig. 14 is another timing cam for controlling the tahle advance;

Fig. 15 is a view similar to Figures 10, 11 and 13 showing a diderent ratio of change speed mechanism for controlling the timing of the cutter head;

Fig. 16 is a plan view of a vise or worlr holder for holding the work in two different positions;

Fig. 17 is a. vertical sectional view taken on the line 1'7 1 of Fig. 16 showing the same;

Fig. 1S is fragmentary sectional view taken on the line 13 18 of Fig. 17;

19 is a vertical. sectional view taken on the line 19-19 of 16;

Fig, 2O is a vertical sectional View taken on the line 20- 20 of Fig. 16;

F 21 and 22 are fragmentary sectional views talen'on lines of like number appearing Fig. 1G;

Fig. 23 is a fragmentary sectional view through the drive pulley taken on the line 23-3 of Fig. 24:

Fig. 24- is a horizontal. sect-ion on the line of e;

Fig, 25 is a. vertical sectional view taken on the line 25-5 of Fig. 2;

Fig. 26 is a fragmentary sectional view taken on the line 26 26 of 24-V illustrating the Ways or guides for thel critter heads;

Fig. 27 is a fragmentary section taken on the line 27 27 of Fig. 2 illustrating the adjuster for the driving pulley for driving the spindles of Ythe operating head;

Fig. 28 is a fragmentary side elevational view of the cam and arm for controlling the timing of the Working or cutter heads;

Fig. 29 is a horizontal section through the cam and timing mechanism shown in Fig. 2S and also shown on the line indicated at 2(3 29 in Fig. 2;

Fig. 30 is a horizontal section on the line 30 30 of Fig. 2.

Fig. 31 is a vertical sectional View on the line 31 31 of 2 showing' the holding mechanism for the vertical adjustment of the Working spindles;

Fig. 32 is a horizontal section taken on the line 32-32 of Fig. 2 showing the same mechanism;

Fig. 33 is a fragmentary section taken on the line 33 33 of 2 showing the mounting for the lower ends of the rodswhich hold the spindle mechanisms in vertical adjustment;

Fig. 311 is a fragmentary sectional view on the line 34e-34 of Fig. 2 showing the clutch for clutching the cam to its operating shaft;

Fig. 35 is a fragmentary view taken on the line 35-35 of Fig. of the same;

Fig. 36 is a sideelevational view and Fig. 37 a horizontal sect-ion through the upper bearing for the lay shaft for the change gear mechanism shown in 2;

Fig. 38 is vertical sectional view through one of the operating heads showing a slotting saw;

Fig. 39 is a side elevational vie-w of the same;

40 is a horizontal section taken on the line .tO-4.10 of Fig, 33

Fig. l1 is a similar horizontal section taken on the line 1 41 of Fig. 3S showing' the reducing gearing;

-12 is a diagram illustrating one cycle of operation;

Fig. 113 illustrates another cycle of operation;

Fig. 44 illustrates with a` sample article the diagram of operation shown in Fi 4t2;

Fig. 45 is a diagram illustrating six operations to be performed as illustrated in the diagram of-Fig. 42;

Fig. 4G as an isometric view of the part worked upon hy the machine;

Fig, l? is a plan view of the part illus- 2 showing another detail nea/,eea

machine herein illustrated is designed to perform a number of operations successively upon successive pieces, and to this end ,l employ a carrier 1 which consists of a rotating disc or platen for convenience in construction and operation, although it is to be understood that the invention is not to be limited to movement in a single plane nor to movement in a `horizontal direction only. Assume that the disc 1 is mounted on a central spindle and is arranged to be vadvanced one-eighth of a revolution in steps timed according to a certain time interval t and permitted to' rest in position between movements for the purpose of permitting the work to be operated upon at each station. in the example that l have chosen to illustrate there are eight successive stations corresponding to the eight positions, but it willy be understood that this is merely illustrative and not limiting. Assume'that the operator standsl between stations 1 and 8 and that the carrier 1 has means such as chuclrs which will be described later, for holding pieces of worlr to be operated upon at points or positions equidistant angularily on the carrier 1. Assume also that at each of positions 2 to 7 inclusive an automatic operating tool is stationed, now it maybe seen that if these tools are arranged in the order in which they are to operate upon the work at successive stations and that these tools are first lowered into engagement with the work simultaneously and then withdrawn, the carrier 1 may be set forward by one step and successive pieces will be fastened in the chucks at position 1 and linished articles taken olf at position 8, six successive steps may be performed.

Now it is to be understood that the sin operations which l have shown need not be performed all at the same point upon the article; for example, assume that three operations are to be performed at one point and three at another, and that these operations comprise respectivelydrilling, counterboring, and tapping two holes as is illustraied in the diagram of 42. That is to say, assume that at position 2 the piece 11 is to be drilled on one center as indicated, at position 3 the hole is to he counter-bored, at position 4 the lower end of the hole is to be tapped, at position 5 another hole is to be drilled, at position (i the second hole is to be counter-bored, and at position 7 the lower end lof the second hole is to bev tapped. These operations are merely illustrative and not limiting. lnstead of drilling, counterboring, and tapping and linstead of operating at two points, different operations and operations at either the same point or at different points may be carried on. Vhere the operations are to be performed upon the piece, such as 11, from different directions l prefer to perform all of the operations in one line, plane o r direction and then rechuclr the piece in a different position and then have the other operations performed. For example, in Fig. 43, l have shown the operators station as between stations 1 and 8 and employ spindles at lpositions 2, 3, 4, 5, 6 and 7 only. In this case operations are carried on in one plane or one position at sta-- tions 2, 4, and 6 whereupon the pieces are rechuclred and then the next step of operation is performed at positions 3, 5, and 7. lt will be understood that all stations need not operate upon the piece, and as will be apparent later the positioning of the operating heads at their stations may be varied in order to secure the desired effect upon the piece of work.

'lhe particular work to which I have applied the machine in the present instance is the drilling, counter-boring, tapping and siotting of a mixture regulating tube holder shown in Figs. 46 and 47. lt will be noted that this comprises a split clamp member 12., comprising a central hole and clamping ears 13 separated by a slot. These ears are drilled, counter-bored and tapped to receive a machine screw for drawing them together in order to shrink the size of the hole in the split clamp `to v'fasten the device upon a suitable mounting stem. The opposite end of the holder comprises also a split clamp for holding a small bored tube such as is used in a Bowden cable construction for operating a valve for a carburetor. rlhe piece is made of a stamping of cold rolled sheet metal and a split clamp at 14 is formed by the two sides ofl the stamping which are `slightly separated as indicated at 15 and a tubular opening is formed at the outer end of the split clamp in order to receive the cylindrical tube which is to be clamped. Th, two sides of the clamp 14 are drilled` counter-bored and slotted as is indicated at the hole 16.

Assume that in manufacturing,the holder shown in Figs. 46, and 47 and 48, itwere first desired to ream the hole 12 in a split clamp, nent to mill the slot 17, then drill, counter-bore and tap the hole 16 all in the same plane or from the saine position. rlhe operations would then be laid out on the machine as shown in Fig. 44. As so laid out, five out of the seven possible positions are employed; the seventh position as numbered on Fig. 44 is idle; the eighth position is employed for releasing the nished holder, andthe first position is employed for chuclring the blank.

I have indicate-:il in Fig. 45 how six operations may be performed such as drilling, counter-boring and tapping two holes which may be laid out as shown in Fig. 42 or laid out as shown inFig. 43.

Now, the actual production of the piece shown in Figs. 46 to 48 requires two operations in two planes, since the hole l2 for the split clamp 13 is to be drilled, counterbored ta )eed and slotted the hole l2 is not I a ll a The carrier cmd its mounting.

The machine shown comprises the revolving table o-r carrier l0, which is mounted for rotation in a horizontal plane upon a stubshatt 20 which stub-shaft 2O (see Fig. 6) is mounted axially in alignment with and telescoped with the main shaft 2l. The stubshatt 2O has a reduced upper end, as shown at 22, Fig. 5 keyed and locked into the hub ot the table lO. The shaft has a bearing in the bronze bushing in 24, mounted in a box 25, forming a part ot' the upper frame plate 26. i

This cylindrical bearing 24 serves to hold the table l0 radially in position and the stubshatt 20 serves to transmit intermittent motion to the table l0 for advancing the same by a step by step motionl through the intermediary of the Geneva mechanism,l which is shown in cross-section Fig. at 27. (The Geneva mechanism is shown in plan view inV Fig. The low r end et stub-shaft 2 0 is recessed shown at 28 to receive the antifriction bushing 29, which forms a bearing for the reduced upper end 30 of the main shaft 2l. Upon the lower end of said stubshatt 20, there is keyed the hub` and web member 3l, to which is bolted the Geneva gear 32, the cooperating Geneva pinion 33 will be described later.

The vertical thrust of the carrier or table 10 is supported upon a large anti-friction bearing 34, this bearing comprising a hardened ring 35 bolted as by means of the machine screws 3G to the bottom ot the table l0, and comprising further a similar hardened plate or ring 87 bolted to the top frame plate 28, these rings beine separated by suitable anti-'friction bearings in this case shown as the ball-bearings 88. The ball-bearings 38 are guided between` two hardened rings 39 and A40, these rings together wit-h the lower ring` 37 forming a suitable race way for holding the bearing roller 38. lt is to be noted that this bearing 34 is disposed in such a manner as to receive most .of the thrust ot the operating heads directly. The table l0 supports at equidistant points the eight chucks or work supports 4l. The work supports shown in these drawings really constitute two chucks. They are all alike and are interchangeablel and are adapted to facilitate the ehueking and unehucking or 'releasing` of the pieces which are ted through the machine and which constitute the work.

The lower end ot vthe main shaft 21 has a radial bearing in the anti-friction bushing 43 formed in the upper end of the boss or box 44, and has a thrust bearing 45 'formed in the lower part of said boss or box 44. This thrust bearingl comprises an upper ring` or race-way 46, a lower ring or race-way 47 and anti-friction Vrollers 48 between said races. The. lower endv of the shaft 2l is reduced as indicated, at 49 to iit snugly within 'he upper race ring 4 6 and to iit loosely int-o the lower. race ring 47. The boss or box 44 has a base flange 50, which is clamped as by means of machine screws 5l upon the top plate 52 of the base member 53. A central boss 54 is formed below the box 44 to sustain the weight ot the main shaft. The base has a suitable clamping or bolting flange for mounting the machine upon the Hoor. A iframe in the shape of a barrel or housing 55, extends up from the base plate 5,2 to the top plate 26. The table or carrier l() has a downwardly extending flange or skirt 55, which overhangs the edge of the top plate 26 and prevents the entry of dirt and toreign matter, and particularly protects the bearing 34. It will be noted from Figure 6 that the stub-shaft 2.0 is drilled as indicated at to permit Oiling of the radial bearing 24 and the telescope bearing 29'y between the stub-shaft and the main shaft.

The working heads.

The working heads 57, 58, 59, 60, 6l and 62 are disposed upon the barrel or the frame housing 54 will be more particularly described in detail later. These working heads are disposed at equiangular stations in the present instance at sin of eight equidistant stations 45l degrees apart.

These working heads are all alike tothe extent of having the same frame, driving and feeding mechanism and being all adapted tol receive. suitable working tools which may be varied. as desired to perform vthe particular operations.

Referring now to the operating head at 59 which is shown in side elevation in Fig. 2, it will be seen that the same has a goose neck trame 63 biturcated at its upper en d 64 to receive the central driving pulley 65. At its lower end the goose neck frame 6,3 has a base 6G (see Figs. 2 and 23) which is clamped upon a, suitable slide or carriage 67, this carriage 67 is mounted upon a clovetailed slide member 68 which holds the carriage 67 firmly in place but permits adjustment radially with respect to the barrel and to the carrier 1Q. The dove-tail guide 69 ts into a corresponding recess thecarriage llt)

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