US1239808A - Die casting or forging apparatus. - Google Patents

Description

A. W. MORRIS. DIE CAS'HNG 0R FOBGING APPARATUS.

1,239,808. APPLICATION FILED APR. 30. "I1. 11, l2 SHEETS-QUIET 2- W A K R A. w. MORRIS. 7 NE CASTING 0R FOBGING APPARATUS.

APPLICATIO FILED AHL 30. 9|?- 1,289,808. PatentedSept. 11,1917.

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' WITNESS INVEIYTOR.

v Ak/ZM/YOJZA fir BY 7M A TTORNE YS.

A. W. MORRIS.

DIE CASTING 0R FORGING APPARATUS.

APPLICATION FILED APR. 30. 19:1.

1,239,808, Patented Sept. 11, 1917.

I2 SHEETS$HEET 4.

INVENTOR.

A TTORNE YS.

A. W. MORRIS.

DIE CASTING 0R FORGING APPARATUS.

'Arrucmon FILED APR. 30, 1911.

1,239,808. Patented Sept. 11, 1917.

l2 SHEETS-SHE 5- o l o fig/4 IN VEN TOR.

WITNESSv 1%! 2070x113". 27 I BY y ATTORNEYS.

A. W. MORRIS.

DIE CASTING on Foncme APPARATUS.

APPLICATION FILED APR. 30. 917.

1,239,808. PatentedSept. 11,1917.

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ATTORNEYS.

A W. MORRIS. ms OASUNG on roasme APPARATUS.

1,239,808. APPLICATION man APR. 30. m1. Patntedsept' n 1917.

I2 SHEETS-SHEET I.

INVENTOR.

A TTOR NE YS.

WITNESS MKM A. W. MORRIS. 'DIE CASTING 0R FORGING APPARATUS.

APPLICATION FILE!) APR. 30. I911- A TTORNE YS.

PatentedSept. 11,1917.

$2 SHEETS-SHEET 3 A. w. MORRIS.

ME CASTING 0R FORGING APPARATUS. Armcmou FILED 1.30. M11.

1 ,2 39 ,808 Patented Sept. 11, 1917.

W) 19 a i w?- w l Y J. 5 Q 1i 14/ r it? INVENTQR. WITNESS L 177 Aflzzi .j azm 2/6 BY W/M.

A TTORNE YS.

A. W. MORRIS.

DIE CASTING on FORGING APPARATUS.

APPLICATION min API. 30. m1.

1,239,808. PatentedSept. 11,1917.

FI/ 1: 1 12112 u IN VEN TOR.

A TTORNE YS.

A. W. MORRIS. 01E CASTING 0R FORGING APPARATUS.

APPLICATION FILED APR. 30. 1912.

Patenmd Sept. 11, 1917.

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WITNESS Q4 [Mari 144mm BY M M A TTORNE YS.

UNITED, STATES 1 ATENT OFFICE.

ALBERT W. MORRIS, 0F SPRINGFIELD, MASSACHUSETTS, ASSIGNOR TO MORRIS PROCESS OF NEW YORK, INQ, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

DIE CASTING OR FORGING APPARATUS.

Specification of Letters Iatent.

Patented Sept. 11, 1917.

To all whom it may concern:

Be it known that I, ALBERT WV. Mounts, a. citizen of the United States of America, residing at Springfield, in the county of Hampden and State of Massachusetts, have invented certain new and useful Improvements in Die Casting or Forging Apparatus, of which the following is a specification.

This invention relates to a die forging apparatus and is particularly designed to carry out the method disclosed in m Patent No. 1,222.78? granted Aprill'l, 191 It will be obvious, however, that the apparatus is capable of other and wider uses in the art of die casting, die forging, and the like on materials other than metals, such as, glass,

rubber, and the like.

According to one feature of the invention an automatic arrangement is provided to carry a plurality of mold parts filled with material to be worked and an automatic mechanism, having a part to cooperate with a mold part, is provided to work the material therein, together with a device to successively transfer mold parts to the mechanism and hack again.

According to another feature of the invention, the metal working part is arranged to operate upon the mold part only when the transferring device has moved a mold from the mold carrying arrangement into alinement with the metal working part and the transferring device is arranged to return the mold to the mold carrying arrangement after the metal working part has been moved to an inoperative position.

According to another feature of the invention, a furnace is provided to supply liqold metal to mold parts on a turret, which carries the mold parts step by step to the intermittently operable metal working part,

and the furnace is arranged to be tapped intermittently l'ietween the step by step movements of the turret to fill the mold parts with liquid metal.

According to another feature of the invention. the mold parts are carried on the turret lly remoiahle holding devices. and an aulonmtio arrangement is provided to periodically move improperly positioned mold parts into proper relation with the turret so that the molds may thereafter be accurately fed into the desired position for cooperation with other parts.

According to another feature of the invention, the mold parts filled with liquid metal are automatically and successively fed step by step into alinement with a reciprocahle power driven ram which cooperates with the mold art to work the liquid metal therein, and t e reciprocable ram is provided with a counterbalancing arrangement whereby it may he moved smoothly into cooperative engagement with the mold parts without producing vibrations sufficient to disturb the liquid metal in the mold parts.

Other features of the invention will appear in the illustrative embodiment of it in the. zn'rmmpanying drawings, in whieh Figure 1 is a general side eleval ioual view oi the complete machine;

Fig. 2 is an enlarged sectional plan view thereof taken on the line 22 of Fig. 1;

Fig. 3 is a sectional elevation taken on the line ii-- of Fig. 2;

Figs. 4, 5, and (i are sectional plan views taken on the lines 4-l. 5-4), and 66, respectively, of Fig. 3, showing the driving mechanism for the turret and the mold transferring slide;

Fig. 7 is a cross sectional view taken on the line 77 of Fig. 3;

Fig. 8 is a cross sectional view taken on the line 8-8 of Fig. 1 showing the press;

Fi 9 is a cross sectional view taken on the hue 99 of Fig. 8 showing the ejecting mechanism Fig. 10 is an enlarged sectional view taken on the line 1010 of Fig. 2;

' Fig. 11 is a view similar to Fig. 10 showing the parts in a different position;

Fig. 12 is a detail plan view showing in diagrammatical form a part of the mechanism shown in Fig. 10;

Fig. 13 is across sectional view taken on the line 13-]3 of Fig. 10;

Fig. 14 is an enlarged sectional plan view taken on the line 14-44 of Fig. 3 showing the means for alining the molds beneath the furnace;

Fig. 15 is a cross sectional view taken on the line 15-15 of Fig. 14;

Fig. 16 is an enlarged sectional plan view the press slide;

Fig. 17 is a sectional elevation taken on the line 1717 of Fig. 16;

Fig. 18 is a cross sectional view taken on the line 18--18 of Fig. 16;

Fig. 19 is a detail sectional view taken on the line 1919 of Fig. 17;

Fig. 20 is an enlarged sectional plan View taken on the line 20-20 of Fig. 1 showing the furnace;

Fig. 21 is a sectional elevation taken on the line 21-21 of Fig. 20;

Fi 22 is a cross sectional view taken on the line 22-22 of Fig. 21;

Fig. 23 is an enlarged cross sectional view taken on the line 2323 of Fig. 1;

Fig. 24 is a detail sectional plan view taken on the line 24-24 of Fig. 23;

Fig. 25 is a fragmentary plan view showing the adjustable cam for operating the furnace valves;

Fig. 26 is a sectional view taken on the line 26-26 of Fig. 25; I

Fi 27 is a bottom plan view showing a detail of the turret driving mechanism;

Fig. 28 is an enlarged sectional elevation taken on the line 28-28 of Fig. 2 illustrating the mounting of the pyrometer;

Fig.29 is a sectional plan View taken on the line 2929 of Fig. 28;

Fig. 30 is an enlarged cross sectional view taken on the line 30-30 of Fig. 2 showing the skimming device;

Fi 31 is a diagrammatical viewshowing the e ectrical circuits for operating the machine from the pyrometer; and

Fig. 32 is a diagrammatical view showing the electrical circuits for stopping the machine.

The machine in general comprises a furnace wherein the metal is heated or maintaincd at the proper tem crature; a press wherein molds filled with eated metal may be positioned and 'a forgin blo w administered thereto by a depressib e ram; a turret operable to position molds beneath the furuace for filling and to carry them step by tep from the latter to a position adjacent the press; and a device to transfer the molds From the turret to the press and back again. In addition are provided means to skim the heated metal free from dross and the like before its containing mold is positioned in the press; mechanism to eject the forging from its mold after the withdrawal of the ram; and devices to. properly aline the molds beneath the furnace into proper filling position. The machine is oierable automatically to'fill the molds, to eliver them propcrly positioned to the press, to administer a forging blow to the metal in the mold, and to eject the finished forging. The temperaturn of the metal in the furnace may be so regulated and the speed of the machine so adjusted that the forging blow is struck at the proper temperature, which is defined in my above identified patent. It is preferred, however, to provide, and I have provided, in the machine controlling devices whereby the operation of the machine is governed by the temperature of the metal in the mold so that the delivery of the forging blow at the proper predetermined temperature is insured.

The eneral frame structure of the machine Wlll first be briefly described. Referring to Figs. 1, 3, and 7, a main bed plate A of hollow rectangular form is su ported from foundation beams B below the evel of the floor C, and bolted to the bed A near one end thereof are two spaced upstanding side frames D for the press. Resting upon the other end of bed A and secured thereto by the bolts shown in Fig. 4, is a hollow boxlike housing E which orms the supportin frame or the turret. Resting upon floor and fixed to one end of housing E is a hollow pedestal F which supports the furnace.

The main-driving connections for the machine will next be described with reference to Figs. 1, 3, and 7. The main driving shaft 35 is rotatably mounted in bearings depending from bed A as shown in Fig. 7, and fixed to one end thereof is a pulley 36 which is adapted to be driven continuously from any suitable source of ower. Keyed to shaft 35 is a suitable fly w eel 37 which functions in the well known manner to equalize by its inertia the speed of the parts driven from shaft 35. The latter drives by a chain 38 and suitable sprockets a shaft 39 which is the driving shaft for the turret and other mechanism as will later appear. Loosely mounted on shaft 35 is a sleeve 40 which extends from the flywheel 37 to a position closely ad'accnt pulley 3G and on the end adjacent t e fly wheel is formed a pinion 41. lhe latter drives a gear 42 keyed to a shaft 43 which is the driving shaft for the press and the ejecting mechanism.

Slidably keyed to the end of sleeve 40 adjacent pulley 36 is a clutch element 44, the jaws of which are adapted to engage with the jaws of a clutch element 45 secured to pulley 36. A plurality of springs 46 mounted in holes in element 44 bear against a disk 47 which is mounted between the element 44 and one of the bearings for shaft 35, as best shown in Fig. 7. The springs 46 tend to force the movable clutch element 44 into engagement with the fixed clutch element 45 to drive the sleeve 40. The clutch element 44 is, however, normally held away from its mating element 45 by a roll 43 fixed to the lower cnd of a vertical rod 49 slidably mounted in a bracket secured to frame A. Red 49 is forced do\\'nwnrdl h a pluralitv of weights 50, and the roll 43 normally rides in a circumferential groove in element 44 to prevent axial movement of the latter. Element 44 is released at the proper time and is subsequently restored to normal position by means to be later described.

Keyed to sleeve 40 is a brake drum 51 and around the periphery of the latter a brake band 52 is arranged (Figs. 3 and 7). The ends of the band 52 are connected to ears on a lever 53 pivoted to the bed A as shown in Figs. 3 and 7. The lever 53 is provided with a vertically depending .rod 54 on which are suitable weights 55, the construction being such that the ends of the brake band 52 are drawn together to constantly apply a braking pressure. on

drum 51. This pressure is adjustable by varying the number of weights 55 on rod 54 and by the turnbuckle connection (see Fig. 3) between the brake band and the le ver 53. The function of this braking device is to stop the rotation of sleeve 40 immediately after the clutch element 4. has been withdrawn from element 45. The sleeve 40 drives by a chain 56 and suitable sprockets an idler shaft 57 (Fig. 3) and the latter drives by a chain 58 and suitable sprockets a shaft 59 which is the driving shaft for operating the furnace valves as will appear.

The furnace will next be described with particular reference to Figs. 2 and 3 and Figs. 20 to 24, inclusive. The furnace casing, indicated by reference G, rests upon the top of the described pedestal F and preferably the weight of casing G upon pedestal F is carried by ball bearings, as indicated in Fig. 3. Casing G is swiveled upon a tubular column 60 mounted cen trally in and upstanding vertically from the pedestal F. The casing G is held from vertical displacement on the column 60 by driving mechanism arranged therein as will later appear. Casing G has apart extending outwardly from the pedestal which part is of hollow cylindrical form, and is lined, first, with a lagging a, which may be any suitable non-conductor of heat, and, second, with fire brick b. The casing thus lined has a circular opening therethrough and depending in this opening is a melting pot c which is supported from the top of easing (l by the circular flange shown in Fig. 3. A cover d rests upon the top of pot r and is secured to the casing G by the screws shown in Fig. 2 so that the pot is closed at the top save for a small opening d (see Fig. 2), whereby metal may be placed in the pot from time to time. The bottom of pot a is closed except for two small openings, and these are normally olosod by valve stems 61. The latter are i-ulnna'lotl. as shown in Fig. 23. to racks (d which are vertically movable in cover (I. Springs 63 act between plugs (ll and the racks to force the latter downwardly to hold stems ()1 in closed position. In mesh with each racl: is a gear 3 lixrd on a short horizontal shaft 66 supported in cars formed on cover cl (see Fig. 1), and on one end of the shaft is a lever 67 provided at its end with a suitable roll. Lever 67 is adapted to be raised from time to time to turn gears in a counterclockwise direction (as viewed in. Fig. 23) to lift racks 62 and thus the valve stems. The latter may, however. be lifted in unison manually when desired by a pipe handle (58 (Figs. 1. L and 7) which may be removably connected to a pin on the hub of gears 65. l'lither valve stem 61 may be independently lifted by rods 69 threaded into the racks 62, as shown in Fig. 23, and passing upwardly through square openings in plugs 64 (see Fig. 24). The latter may be removed by a socket wrench inserted in these square openings. and thereafter the valve stems o1 may be removed by lifting rods 69. The rods fil may be and preferably are normally rcmoved and are generally used onlv in emergeneies as a means of lifting the hot valve stems from the melting pot.

The lever 67 is liftable periodically by a cam 70 on a plate 71 which is keyed to a tubular shaft 72 mounted concentrically within column (50. all as shown in Fig. 21. Keyed to the lower end of shaft 7*. is a bevel gear 73 which is driven by a bevel pinion 74 fixed on the described shaft 5! The cam 70 and gear 73 a re further clamped to shaft 72 by the nuts shown in Fig. 21 and thus serve to prevent axial displacement of easing (l on the pedestal F. The com 70 has been indicated in Figs. 1, 2, and 3 in conventional form merely, on account of the small scale to which these fig ures are drawn. The detailed construction of the cam is best shown in Figs. 25 and 213. As there shown. the cam is found in two parts 70 and 70. the former being fixed to the plate 71 (Fig. 26) and the latter being secured thereto for angular adjustment (Fig. 25). The parts 70 and 70' fit together with a tongue and socket and are so arranged that the dwell portion of the cam may be lengthened out without causing any break therein to interfere with the action of the roll on lever 67. The part 70 is formed with a gradual rise leading to the dwell of the cam and the part 70' terminates sharply so that the valve stems are gradually opened and sharplv closed. The opening of thevalve stems in the described embodiment is constant, the variations in the. quantity of metal leaving pot 0 being efl'ected by varyingthe time rather than the amount of the opening. The amount of the opening may obviously be varied if desired.

Referring to Fig. 20, the casing (l and its linings a and 7) are provided with a plurality of o enings arranged in angularly spaced relation about their peripheral walls. In each opening is a nozzle 'e which is directed substantially tangential to the'melting pot c. The nozzles e are connected by. piping f, as clearly shown in Figs 1 and 2, to a head 9. Referring to Fig. 21, the head 9 is interiorly tapered and fitting therein is a hollow cone g which is held to the head 9 by the nuts shown. Cone g is connected by a pi e h which passes downwardl through sha t 72 in concentrical relation t erewith to a mixing fitting i. The latter is loosely supported hi on the described shaft 59 and has an upstanding part loosely fitting into the base of shaft 72. The mixer 11 has separate passages i and i for air and gas, respectively, and these passages are supplied by pipes 3' and k. The pi es j and In extend upwardl inside pedesta F, then outwardly to suitab e valves j and k, as shown in Fi 22, and'from the valves the pipes pass ownwardly below floor O, as shown in Fig. 1. By the construction described, the air and gas is mixed in the fitting e' and the mixture is thereafter 1 conveyed through pipe in to the cone g.

The latter has a lateral opening which permits the mixture to pass to a circumferential a0 passage inthe interior of head 9 and from the latter passage to the pipes I and thus to nozzles e. The parts 9 and g constitute a swivel joint and permit the furnace casing G to be swung on column 60 as a pivot when as desired without disturbing the supply of fuel to the furnace.

The turret for conveying molds. from the furnace to the press will next be described with reference to Fi s. 1, 2, 3, 6, 7, and 14.

co The turret is mounte on the described housing E, the shape of which is best shown in Fig. 6.' As there shown, the housing has beveled corners and pivotally supported on the latter are rolls 75, which are preferably of frusto conical form, the small ends being arran ed adjacent the housing. A turret plate 6 (Figs. 1, 3, and 7) of annular form, has on its under face an annular inclined surface 7 6 which rests u on the rolls, as best shown in Fig. 1. T e frusto conical rolls coact with the inclined surface 76 to resist the radial thrust of plate 76. A frame I l, best shown in longitudinal section in Fig. 3, rests upon the top of the housing E and extends longitudinally across the latter. Frame H is secured to the housing E by the bolts shown in Fig. 6, arts of the frame being broken away in t is figure to reveal other mechanism. Referring to Fig. 1-1, so each end wall of frame H is curved from the center of housing E and the inner pcriphoral edge 77 of plate 76 rides on these curved surfaces and is guided thereby. The

surface 77 is further engaged at points dia- 55 metrically opposite from those engaged by frame II, by rolls 78 mounted in the upper ends of short vertical shafts 79 which are rotatably supported in bearings formed on the walls of housing E, as best. shown in Fig. 7. 7g

Fitted into the upper face of plate 76 are a luralityof keys 80,twelve in the emb0 iment illustrated,- which are arranged radially and in equal angular spacing about the periphery of the plate. Resting on the upper face of plate 76 and on each side of each key 80 is a block Sl. which is in abut ment with the key, as best shown in Fig. 1. The blocks 81, as shown in Fig. 14, are slightly beveled on their inner ends, so that 30 adjacent blocks abut and close off the interior space. The upper face of each block 81- is recessed on the side adjacent key 80 so that each air of blocks forms a slideway to receive a lock 82, as best shown in Fig. 1. 35 Blocks 82 are generally rectangular in form and, as shown 1n Fi 3, have on their inner ends a hook 83. Gi plates'84. (Fig. 2) of sector shapefrest upon the upper faces of blocks 81 andoverlie side edges of blocks S2. Screws 85 (Fig. 2) pass through gibs 84 and, as indicated in Fig. 14, extend throu h blocks 81 and are threaded into the plate 6. A circular cover 86 (Figs. 2 and 3) closes the space inside the blocks 81, and {)3 the cover rests upon the top of the described frame H, being secured thereto by screws, as indicated in Fig. 15.

Rotatably mounted in lugs formed on the upper surface of cover 86 are a .pair of rolls 86 (Figs. 3 and 7) which support the overhanging end of the described furnace casing,

G, as best shown in Fig. 2. Pivoted to and between suitable lugs 111%id on the upper face of cover 86 is a bi crank lever 86 5 which is normally positioned, as shown in Fig. 3, with the end of its short arm in engagement with a suitable slot in the bot tom of easing G to lock the latter against pivotal movement on column (50. Casing G 113 may be released by swinging the long arm lever 86 upwardly in a countercloclnvise direction.

Eachblock S2 is formed with a pair of openings in which flanged molds Z are fitted, 115 as clearly shown in Figs. 3 and 7. The molds Z are shown in cross section in Fig.

30, and the interior contour may be varied as desired. 'Thc bottom of each mold is closed by a pin 87 which will hereinafter be called-a kicker pin. Each pair of pins 87 are fixed in vertically upstanding relation in a bar 88, as shown in Figs. 3 and 7. Bar

88 rests upon the described keys 80 and, as shown in Fig. 14. lies in the channel formed between a pair of the blocks 81. The molds Z are adapted to be brought in pairs successively beneath the melting pot a and are there filled with metal.

The means for turning the turret will 1 now be described. Referring first to Figs. 4 and 7, the described drivingshaft 39 is in line with and terminates adjacent the end of a shaft 89. Shafts 39 and 89 are nor mally disconnected but may be connected together by a clutch. Any suitable clutch may be provided and that shown in the drawings is given merely as an illustration of one operable means for accomplishing the desired function. This clutch comprises a sleeve 90 keyed to shaft 39, a split disk 91 (Fig. 7) loosein the inner cup ed end of the sleeve, and a sleeve 92 slidab y keyed to shaft 89. Sleeve 9'2 has a wedge (Fig. 7) which is adapted to enter the split in disk 91 to expand the latter against the interior walls of sleeve 90. Sleeve 92 is fixed to a grooved sleeve 93 and loosely engaging in the groove is a U-shaped part9-l fixed to, the inner ends of a pair of horizontal rods 95 which are slidable in housing E against the force of springs 96. Two levers 97, one on each side of shaft 39, are pivoted to bedA, as shown in Fig. 7, and are slotted to receive extensions of the U-shaped part 94. Arms- 97 are bent in right angular form, as shown in Fig. 7, and have parts extending without housing E which parts are connected together by a foot treadle m. Thus by depressing the latter, moved to expand disk 91 and operably .connect shafts 39 and 89. i i a Fixed to the housing E, as shown n Fig. 4, is a housing I in which the shafts 5'4 and S9, heretofore described, are mounted in spaced parallel relation. Fixed on shaft 89 is a worm 98 which drives a worm wheel 99 fixed on a short vertical shaft 100. The latter is arranged in the center of housings I and E and centrally with respect to the turret plate 70. Fixed to shaft 100 and above the housing I is a master cam plate 101 which has on its lower face a roll 102 and an arcuate depending rim 103 (Fig. 5). Mounted on the lower end of a short verti cal shaft 103- supported in bearings formed on housing E, as best shown in Fig. 3, is a Geneva cam 105 which is ads ted to be driven intermittently by roll 10-2 in the well known manner. The master cam 101 and Geneva cam 105 are shown diagrammatically in a bottom plan view in Fig. 27. From this figure, it will be seen that cm 105 is locked by the rim 103 against rotation and will remain locked while the roll 102 moves substantially one hundred and eighty degrees in the direction of the arrow. As roll 102 engages a slot in the Geneva cam 105, the rim 103 will be removed from looking engagement and cum 105 will be turned through an angle of ninety degrees. After being thus moved, the Geneva cam 105 will again be locked by rim 103 during a movement of the roll 102 through substantially two hundred and seventy degrees.

the sleeve 92 may be Fixed to the upper end of shaft 10 1 is a gear 106 (Fi s. 3 and 6) which drives a pinion 107. hove the inion.107 is a circular pinion 108, and t e two in the embodiment illustrated are made in one piece, as shown in Fig. 3, and are rotatablymounb ed in a split bearing formed on the exterior of housing E, as clearly shown in Fig. 6.

customarilyforms on the uppersurface of the .metal. "The means for skimming the metal virillhow bedescribed with reference- .toFigs. '2', 7,. and 30. As shown in Fig. 30, the {molds are completely filledwith metal and, as is well known, the metal due to capillary attraction curves upwardly. 7 By strikin off the art of the metal curving upwar ly above t e mold, the impurities or dross is=removed. To accomplish this function, a blade 110, arranged at an angle of approximately forty-five degrees and having a curved lower end, is used. Blade 110 is supported by two rods 111 which pass loosely through an overhangin part of a bracket J secured to cover 80 ig. 2), and are provided with nuts to engage the latter. Springs 112 force the blade 110 against both molds as they pass thercinnndcr on movement of the turret. The nuts on rods 111 limit the downward travel of the blade 110, and these are so adjusted that there is onl arclatively slight lift of the blade, the lift being accomplished by the molds l which cam the curved end of the blade upwardly. 110 The skimming device has been shown as adjacent the second step position of the molds from the furnace but may be located at any other position in the two upper quadrants of the turret, as viewed in Fig. 2. 115

In order to revent the possibility of the dross, removed from the metal in molds I, from falling on blocks 82 and working its way between the latter and gibs S t and interfering with the free sliding of these parts, means are provided to receive the dross and 7 suitable means.

overlap the gibs 84 so that the block 82 is shielded from the dross removed from the molds. The pans 110' 0 en radially outward from the turret, and the dross received in the pan may be removed therefrom by any For example, nozzles 111 supplied from a suitable source of compressed air (not shown) are mounted on the cover plate 86 adjacent the rear of pans 110'. These nozzles are directed substantially radially outward and so that they wil lie on opposite sides of molds Z when the turret comes to rest. Nozzles 111 blow the dross radially outward from pans 110' and a suitable container may be placed on lioorC, if desired, to receive the dross. The nozzles have been shown adjacent the fourth step position of the turret but obviously they may be located at any other suitable position as desired. It is to be understood that the pans 110 are applied to each pair of molds 1, although on y two are shown in Fig. 2, and, although they have been omitted except in Figs. 2, 7, and 30, for the purpose of more clearly showing other and more important details.

The means for transferrin the molds from the turret to the press wi 1 now be described. The turret, as shown in Fig. 2, is movable closely ad acent the press, but, in order to bring a pair of molds Z in proper position in the press, it is necessary to move them outwardly from the turret a distance slightly greater than that of the mold sup porting block 82. To accomplish this function, a reciprocable slide 113 is mounted in ways 111 formed in the upper face of frame ll already described (Figs. 3 and 7). Slide 113 is shown in extended position in the drawings with the exception of Fig. 28. lVhen retracted, as shown in Fig. 28, a hook 115, in the end thereof, lies in the circumferential path of the hooks 83 on blocks 82 so that each hook 83 automatically interlocks with the hook 115 as its block 8215 swung into the position adjacent the press the position diametrically opposite the furnace G). The hook 115 is curved, as shown in Fig. 2, to emit convenient interlocking with the 1100 s 83. Fixed to the inner end of slide 113 and depending therefrom is a member 116 to the bottom of which is fixed a rack 117, all as clea-rl shown in Fig. 3. Rack 117 as shown in Fig. 7 is also guided in frame Referring to Fig. 6, rack 1.17 has teeth on each side edge thereof and on each side of the rack and in mesh therewith is a so mental gear 118. The latter are fixed on the shafts 7 9 journaled in brackets on housing E.

Referring to Fig. 5, fixed on shafts 79 below gears 118 are segmental Geneva cams 119 which are adapted to be driven intermittently by a roll 120 on the upper face of ninety degrees during which time the press o crates. During the operation of the press, mm 121 looks the lower cam 119 and thus the slide against movement, and the rim releases lower cam 119 just as roll 120 enters the upper cam 119. Roll 120 will turn the latter through an angle of ninety degrees thus actuatin its gear 118 and retracting the slide 113. he two cams 119 move in unison by reason of their connection with rack 117 and thus the lower cam 119 by the retraction of the rack is moved to a position wherein the entrance for its roll overlies the exit for the roll 102 of the lower Geneva cam 105. Thus, the slide 113 having been retracted, the cam 105 is operated to turn the turret and,as soon as the turret comes to rest, the slide 113 is again operated.

Other means for intennittently operating the turret and slide 113 may be provided, but the described arrangement is particularly advantageous in a machine of this character. It is to be noted that, by using the Geneva cam motion for operating the turret and slide, the members are gradually started and gradually brought to rest. The motion of the Geneva cam is nonuniform, increasing gradually from zero to a; maximum and gradually back again. Thus, there is" no sudden starting or stopping to disturb the metal in the molds.

The press will next be described with reference to Figs. 1, 2, 3, and 8 and Figs. 16 to 19, inclusive. Fitted between the described side frames D and'resting u on the upper face of the bed A is a block which forms the bed of the press. Bed K is keyed to the side frames D, as shown in Fig. 8, and is further clamped therebctwecn by lateral throuh bolts 122, as shown in-Fig. 3. Bolted to t e upper face of bed K and positionedcentrally thereon by a circular key a is a bolster 0, which, as shown in Fi 8, is channeled longitudinally to receive t e die block 82 and the kicker bar 88. Gibs p secured to the u per face of bolster 0 on each side thereo overlap the block 82, as shown in Fig. 8, to prevent vertical displacement of the latter.

Above the lower bolster, the side frames D are slotted, thus forming four upright posts, one at each corner. shown in Fig. 16, are beveled to form ways These posts, as

, is depressed. The. members 8 are 123 and slidable on the latter is the press slide L R otatably mounted in the latter is a trunnion 124' which extends entirely through the slide and projectsthrough .and

beyond the slots in the side frames D...

Each end of the trunnion is formed with eccentrically disposed portions 125, and these portions are connected by connecting rods 126 with crank pins 127- formed on the shaft 43 already described, all as clearly shown in Fig. 8. Bolted to the lower face of slide L and positioned centrally thereon by a circular key q is an up or bolster r (Figs. 3 and 8). Seated in olster r are two die or ram members a which are adapted to engage in molds l and delivers. for ing blow to themetel therein whenthe 'sli e rovided with circularly flanged bases w ich, 'as shown in Fig. 3, are engaged by a clamping latewt sccurcdto the ho ster, as shown in -ig. 8, whereby held 'in' osition.

. It wil reciprocable by the crank and connecting heretofore described, is operated. The rains 8 may thus "be brought into engagement with metal in molds Z- to deliver a forging blow on the metal. The crank and connectin rod mechanism for operatingthe slide L is important and advantageous since it will be noticed that the slide gradually decreases in eed as it approaches the molds Z and, with the decrease in speed, the force of the blow imparted by rams s on the metal is increased. This results from a toggle action for, as the crank 127 a preaches its lower dead center 'POSltlOII, tie centers of in 127 and the shaft 43 and trunnion 125 ecome positioned in a common straight line. ticular importance since it permits the delivery of an ufnrelaxed forging blow of the desired character upon the metal in molds Z.

T he slide L is vertically adjustable to permit the rams s to be moved closer to-or farther away from molds Z for adjustment purposes. The means for adj usti-n the slide will now be described with re erence to Figs. 3, 8, and 16. Fixed centrally on the described trunnion 124 is a worm wheel 128, and below the latter is a worm 129 horizontally mounted in slide L, as best shown in Fig. 3. Form '129'has'extensions 130 on each side thereof which extend outside slide L and the ends of extensions 130 are squared, as shown in Fig. 3, to permit the worm to be conveniently turned by a socket wrench or other suitable means. By turning worm 129, trunnion 124 is turned, and the centers of parts 125, which, as already described, are eccentrically located with respcct to trunnion 12 1-. the parts 125 may be raised or lowered in their hearings in (onthe members 8 are; firmly This toggle action is of parmeeting rods126, thus raising or lowering slide L. v

The slide'L is also preferably made adjiistuble laterally to com ensate for wear on its guiding surfaces w ich slide on the surfaces 123 and for wear on the latter surfaces themselves. This adjustment is obtained by a pair of vertically slidablc gibs 131 (Figs. 16, 17, and 19) which are mounted in spaced parallel relation in one end of slide L and are adapted to engage two of the surfaces 123, as shown in rear edges of gibs 131 are inclined to the vertical and seat on an inclined surface 132 inislide L, as clearly shown in Fig. 17. The

gibs 131 are slotted, as shown in Fig. 17, and screws133 extend through these slots (Figs. 16 and 17) to hold the gibs to slide L. A bridge 134, connects the tops of gibs 131 (Fig. 19) and threaded centrally therein is a screw 135 having a squared head to permit convenient turning. The lower end of screw 135 passes loosely through a. bar 136 secured to the slide L, as shown in Fig.

1!), and is flanged, as shown in Figs. 8 and 'rod devices described when the pinion 1,

19, to prevent its removal from 'bar 136. It

1+ ig. is. The

will be obvious that, as screw 135 is turned,

gibs 131 may be raised or lowered in unison relatively to slide L to loosen or tighten the latter with respect to the ways 123.

The slide L is further counterweighted by means which will now be described with particular reference to Figs. 8, 16, 17, and 18. Secured to each end face of slide L (Figs. 16 and 17) just above the trunnion 124 1s a plate 138 which is vertically slotted adjacent each end, as shown in Fig. 16, to receive the rec-r side plates. of a sprocket chain 139., The frontside plates of the latter extend outside the plate 138 and the front and rear side plates may be held together by pins passing through plate 138, as indicated in Fig. 18. Chains 139 pass upwardly over sprockets 140 pivotally mounted in and near the top of the uprights D (Figs. 17 and '18). The chains 139 then extend downwardly withinthe hollow uprights D and are connected to rods 141, which extend downwardly through the side frames D, as shown in Figs. '2 and 5, through bed A (Fig. 8) to a position below gear 42, as shown in Fig. 1. The lower ends of the four rods 141 are connected to a suitable counterweight at indicated conventionally in Fig. 1.

Secured to the outside face of each of the. described plates 138 is a plate 142 which extends downwardly and engages in a circumferential groove in the described trunnion 12-1=-to prevent axial movement thereof (Figs. 8, 16, and 18).

The tops of the side frames D are connected together by'a cap M which is bolted to the top of jhe frame. as indicated in Figs. 1, 3, and 8-, and the frames D are housing E'near the rear wall thereof is a short horizontal shaft 144 and fixed to the end of the latter within housing E is an arm 145 (Fig.v 5) which extends horizontally through an opening in the rear wall of housing E, as shown in Fig. 7, and is forked to receive the rod 49 (heretofore described) and fitzin under a nut on the upper end of the latter.' Referring to Figs. 6 and 13, fixed on the other end of shaft-144 is an upstanding arm146 which has a forked upper end iii-which one end of a link 147 is pivotally mounted. In the otherend of link147, a. rod 148 is threaded which rod extends to the front of the machine (Figs. 6 and 13) for convenient actuation. Rod 148 is for manual operation and, when pulled forwardly, will raise rod 49 and lift roll 48 from engagement with. the clutch member 44, thus permitting the latter to be moved into mating engagement with element 45 by springs 46. i

Automatic means are, however, provided for operating the link 147. An arm 149, fixed to the upper end of a short vertical shaft 150 mounted in bearings formed on the interior of housing E (Figs. 3 and 5) has its free end slotted, as shown in Fig. 12, to receive a pin 151 which is fixed in link 14? (Fig. 13) and extends vertically downward therefrom. Link 147 is supported upon the free end of the arm 149, as shown in Figs. 3 and 10, and a spring 152 (Fig. 6) connects the rod 148 to a. side wall of housin'g E so that the pin 151 is normally held in the slotted end of arm 149 in the position indicated by the cross hatched circle in Fig. 12. To the lower end of shaft 150 isfixedan arm 153 (Figs. 3 and 5) whihh bears onits upper face a roll to engage a cam plate 154 secured to the under side of the described master cam plate 101. As shown in 5, the arm 153 is just about to be move by cam 154. and arm 149 will be actuated to pull link 147 forwardly and lift roll 48 to ratio between the gears 41 and 42, several revolutions of gear 41 will be'necessa to cause a complete revolution'of the latter. To hold roll 48 lifted for the necessary 111- terval, the following mechanism is used. An arm 155 (Figs. 6 and 13) is secured to the described shaft 144 adjacent the arm 146. Arm 155 extends vertically upward and has its upper end bent horizontally and formed with a forked end. A rod 156 passing loosely through a. bracket '11 secured to slide L is supported fromthe bracket by nuts, as shown in Fig. 3. Rod 156 extends vertically downward and is encompassed by the forked end of arm 155. Ata short distance above the latter, nuts 157 are threaded on rod 156 (Fig. 13) and on the lower end of the rod are a series of weights 158. The cam 154, as will be seen from Fig. 5, has a relatively long dwell portion which holds roll 48 lifted until the press slide L has descended a short distance. As the press slide L descends, the nuts 157 engage the top of arm 155 and the weights 158 are brought to bear on the arm to counteract the weights 50 on rod 49 and hold'roll 48 lifted. On further descent of the press, bracket '21 moves idly along rod 156. Thus, the roll 48 is held lifted until the press slide L nears the end of its return stroke when the bracket 11 will engage the nuts on the u per end of rod 156 and lift the latter to ree arm 155 from the action of weights 158.

The roll 48 is thus allowed to drop slightly before the end of the ascent of slide L, and automatic means are provided for retracting clutch element 44 which means will now be described with reference to Figs. 5 and 7. Roll 48 as it drops does not fall in the more of clutch element 44 since the latter ias been moved axially from the position shown in the drawings by the springs 46. The roll drops so as to partially overlie the groove on clutch 44, but it rests upon a surface 159 adjacent the groove. A cam 160 is secured on this surface and extends only over a relatively small arc of the periphery thereof. As clutch 44 continues to revolve, roll 48 is engaged by cam 160, and the clutch 44 is forced out of engagement with its mating element 45. Clutch 44 finally is moved to such a position that roll 48 drops by the force of weights 50 into the groove in the clutch. The ratio between gears 41 and 42 is in the embodiment illustrated one to six, and thus clutch element 44 must make six complete revolutions to cause one complete cycle of operation of slide L. Thus, the necessity for preventing roll 48 from dropping is apparent. Roll 48 is timed to drop by the ascent of slide L at a time when clutch element 44 has started a short distance on its sixth revolution. Thus, the clutch 44 does not immediately open as arm 155 is released but continues a sufiicient distance to raise slide L to its normal position. The braking device, comprising the members 51,52, 53, 54, and 55, formerly described, stops the rotation of the pinion 41 immedi-

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