US1524576A - Feed mechanism - Google Patents

Description

J. "A. ROGERS FEED MECHANISM Oglginal Fil'd Nov. 25, 1921 5 Sheet-Sheet 1 Jxq oyerms Patented Jan. 27, 1925.

JOHN A. ROGERS, 0F ATLANTA, GEORGIA,

ASSIGNOR TO RAILWAY LOCK-SPIKE COM.-

PANY, OF ATLANTA, GEORGIA, A CORPORATION OF GEORGIA.

FEED MECHANISM.

Original application filed November25, 1921, Serial No. 517,552.

January 8, 1924.

To all whom it may concern:

Be it known that I, JOHN A. Rooms, a citizen of the United States, residing at Atlanta, in the county of Fulton and State of Georgia, have invented certain new and useful Improvements in Feed Mechanism, of which the following is a. specification.

The invention relates to feed mechanism and has as an object the provision of an apparatus'adapted to feed a forging machine. A further object of the invention is the provision of a feeding mechanism particularly adapted for use with the device disclosed in my copending application, 517,552 filed No vember 25, 1921 of which application the present is a division. An illustrative embodiment of the invention is shown in the accompanying drawings in which,

Figure Us a front elevation.

Figure 2 is a side view seen from the left in Figure 1.

Figure 3 is a vertical section on line 33 of Figure 1, and

Figure 4 is a side elevation of a stop and brake lever as-seen from theuright of its position in Figure 3.

The feed mechanism as shown is adapted to be bolted to the frame of a machine bymeans of three brackets 230, 231 and 232.

The rod 224 is adapted by reciprocation, to operate the mechanism and is shown as connecting with a lever 233 by means of a block 234. Preferably the connection of the rod 224 with the lever 233 is elastic, springs 235 and 236 being interposed between the screws 237' and 238 and the block 234. By adjustment of the screws 237 and 238 the strain upon the springs may be varied so as to make the connection more or less firm.

The lever 233 is rigidly secured to the shaft 239 journaled in the brackets 230 and 231 at its opposite ends; Also rigidly secured to the shaft 239 is a lever 240 carrying adjustably mounted therein a journal block 241. Pivotally secured to the journal block 241 is a second journal block 242 carried by the end of an arm 243 which arm is pivotally attached to a ratchet mechanism 244.

The ratchet mechanism as disclosed comprises asector shaped plate having a plurality ofpawls 245 pivoted thereon. The

pawls' are so spaced that the distance be- Divided and this application filed Serial No. 685,048.

tween them is a multiple of the distancebetween two teeth of the gear 246 with which the pawls coact plus one-quarter of the circular pitch of the gear teeth. As a result of this arrangement the lost motion of the sector 244 before one of the pawls comes into action will never be more than onequarter of the circular pitch of the gear teeth.

To support the bar engaging portion of the feed mechanism a pair of standards 247 and 248 are journaled upon a shaft 249 which shaft is mounted in boxes 250 and 251 in brackets 231 and 232. To feed the bar shown in dotted lines at 252 a lower chan neled feed roller 253 is secured to a shaft 254 upon which a gear 246 is mounted. Meshing with gear 246 is a gear 253 secured upon a shaft 256 which shaft carries the upper feed roller 257; The feed rollers are each preferably channeled upon their edges as more clearly shown in Fig. land. to pro- Vide a more positive actuation of the bar the bottom of the channel is preferably roughened or corrugated.

To guide the bar 252 to the feed'mechanism two pairs of rollers 258 are shown mounted between plates 259 secured upon the front edges of standards 247 and: 248 as feed mechanism shall first present a small portion of the bar to be bitten off and then subsequent lengths ofthe correct dimensions for the article to be made, a stop member 263 is mounted upon a shaft 264 carried by a bracket 265 which bracket is secured to standard 247 as by bolts 266.

The stop lever 263 is shown in detail in Fig. 4 as viewed from the right of Fig. 3. The nature of the feed mechanism and necessary size of feed rollers 253 and 257 makes it impossible to locate them" near enough to the dies to feed the last'remnant of the bar which may be of suflicient length to form a completed article. To provide for feeding such remnant a grooved rollcr 267 is journaled upon an arm 208 piv-- oted upon a shaft 256, which arm has a projection 269 beyond the shaft to which projection a spring 270 is secured, the other end of the spring being entered upon a screw 271 mounted in the plate 272 connecting the top of the standards 247 and 248. Coasting with the roller 267 is a roller 273 mounted upon a shaft 274 which shaft is adapted to be actuated by a pinion 275 through an idling pinion 276 which in turn is in mesh with the teeth of gear 246, the idler 276 being interposed to provide a correct direction of revolution of shaft 274. The pressure of roller 267 under influence of spring 270 will press the bar 252 against the feed roller 273 and provide for feed of the bar when it has left rollers 253 and 257.

To press the upper roller 257 upon the bar, the shaft 256 upon which it is mounted is carried in slidable blocks 277 and 278 which blocks are mounted in standards 247 and 248 and are spring pressed downwardly by springs 279 and 280 acting against plates 281 and 282. Adjustably pressed by screws 283 and 284 (Fig. 1) which screws are mounted in the plate 272.

To lift the feed roller 257 in order to stop the feed of the -bar at any moment an arm 285 is pivoted upon a projection 286 carried by a hub 287 which hub is adapted to be actuated by a lever 288. To actuate the stop member 263 at the same time that the roller 257 is raised the hub 287 has an arm 289 projecting therefrom upon which arm a spring 290 is seated which spring in turn presses against the portion 291 of the stop arm 263. The lever 288 will be actuated when a bar has been run out of the rollers 253 and 257 and while the remnant is still within control of feed rollers 267 and 273, the stop member being projected in the path of the new bar to be introduced and between this bar and the remnant which is being forwarded by the supplemental feed rollers. For the purpose of stopping the feed ofalong bar at any time during its use means are provided for lifting the roller 267 in the form of an arm 292 pivoted upon a projection 293 carried by a hub actuated by a lever 294. The hubs of levers 288 and 294 are as shown journaled upon shaft 239 upon which shaft the standards 247 and 248 are mounted. As will be seen by an inspection of Figs. 1 and 2 the two levers 294 and 288 are in fore and aft alignment and lever 294 carries a projection 295 so that while lever 288 may be operated alone lever 294 cannot be operated without simultaneous operation of lever 288. When the two levers are operated together the spring rseaeve 290 will be compressed and the stop meinher 263 will be resiliently pressed against the side of the bar which is in the feed mechanism and act as a brake to stop any movement of the bar which might be caused by its contact with the lower rollers and 273.

To positively locate the stop 263 when a bar is introduced and abuts against it a stop screw 296 is provided on the bar which stop screw abuts against the frame of the machine upon which the feed mechanism is mounted and may be adjusted by loosening the lock nut 297.

l Vhen dies sever a piece of the bar which is introduced between them there maybe a slight fin which is not entirely out through which would interfere with the discharge of the formed article from the dies. To break such fin a projection 298 extends under the bar in close proximity to the cutting edges of the dies and which projection is carried by a lever 299 pivoted upon a shaft 300 and actuated by a roller 301 mounted upon a clip 302 rigidly secured upon shaft 239. By circumferential adjustment of clip 302 upon the shaft the amount of movement of the projection 298 may be varied. The lever 299 is held in its normal position out of contact with the bar by means of a spring 303.

When a piece of material is severed from the bar by action of dies the main portion of the bar will be forced away from the dies with considerable power. This would interfere with. the correct feed of the machine if it resulted in slippage in the feed rollers. To provide a yielding action of the feed mechanism under this pressure the standards 247 and 248 are adapted to swing about shaft 249 being held in their forward position by a spring 304 secured at 305 to the frame of the machine and to an eye 306 in the end of shaft 254 and also by a spring 307 shown in dotted lines in Fig. 1 abutting against a projection 310 from standard 247 and against a screw 308 secured in a tapped opening in the frame of the machine whereby the pressure of the spring may be adjusted.

The location of the standards of the feed mechanism in the forward position may be determined by means of a screw 309 tapped into one of the standards and abutting against the frame of the machine and by adjusting this screw 309 the exact distance of the feed rollers from the dies may be determined.

The stroke of the feed mechanism may be adjusted at two points. First the distance of block 234 from shaft 239 may be adjusted, and second, the distance of block 241 from shaft 239 may be adjusted, each of which will vary the length of stroke of the feed mechanism and therefore the amount of stock fed to the machine at each stroke.

While the feed. rollers 267 and 273 are supplying. the remnant of a bar to. the die a new bar may be introduced to the rollers 253 and 257, thereby avoiding loss of time in the operation. of the machine.

Minor changes may be made in the physical embodiment of the invention without departing from its spirit.

I claim:

1. In a forging machine, in combination,

feeding mechanism comprising an oscillatory shaft, a. lever rigidly secured to said shaft, a connecting rod pivot-ally secured to said lever, resilient means between said rod and said pivot whereby the action of the rod upon the lever is cushioned in both directions, means whereby said shaft operates said feeding mechanism.

2. In a forging machine, in combination, a feeding mechanism comprising an oscillatory shaft, a lever rigidly secured to said shaft, a connecting rod pivotally connected to said lever, a cam for actuation of said rod, an actuating lever rigidly secured to said shaft, ratchet mechanism operated by said actuating lever and feed rolls intermittently operated by said ratchet mechanism.

8. A feeding mechanism comprising in combination, a pair of feed rolls, a pair of intermeshing gears for operation of said rolls, a supplemental feed roll actuated by one of said gears, and a supplemental pressure roller enacting with said supplemental roll.

4. A feeding mechanism comprising, in combination, a pair of feed rolls, a pair of intermeshing gears for operation of said rolls, a supplemental feed roll actuated by one of said gears and a supplemental pressure roller eoacting with said supplemental roll, means to resiliently press said supplemental pressure roller upon stock to be fed, and means to release said pressure.

5. A feeding mechanism comprising, in combination. a feed roller, a shaft journaled in fixed bearings carrying said roller, a pressure roller resiliently pressed toward said feed roller, means to raise said pressure roller to interrupt the feed, a lever for raising said pressure roller, a stop member moved by said lever into the path of move ment of material being introduced to said mechanism and moved from said path upon return of said lever to normal.

6. A feeding mechanism comprising, in combination, a feed roller journaled in fixed bearings, a pressure roller resiliently pressed toward said feed roller, a supplemental feed roller. a supplemental pressure roller resiliently pressed beyond said supplemental feed roller, a lever for raising said pressure roller, a second lever for raising said supplemental feed roller.

7. A feeding mechanism comprising. in combination, a feed roller journaled in fixed bearings, a pressure roller resiliently pressed toward said feed roller, a supplemental feed roller, a supplemental pressure roller resiliently pressed toward said supplemental feed roller, a lever for raising said pressure roller, a second lever for raising said supplemental feed roller, said second named lever being inoperative except when said first named lever is operated.

S. A feeding mechanism comprising, in combination, a feed roller jonrnaled in fixed bearings, a pressure roller resiliently pressed toward said feed roller, a supplemental feed roller, a supplemental pressure roller resiliently pressed toward said supplemental feed roller, a lever for raising said pressure roller, a second lever for raising said supplemental feed roller, a stop member, means actuated by said first named lever for resiliently pressing said stop member into the path of move- -ment of material being introduced into said feed mechanism or against material. pressing in the path of movement of said stop member whereby when a bar is present in the machine and said levers are moved simultaneously both pressure rollers will be lifted and the bar will be frictionally held by said stop member to prevent movement thereof.

9. A feed mechanism comprising, incombination, an oscillatory shaft, means actuated by said shaft to feed material to a set of dies, a. lever mounted for oscillation upon said feed mechanism and having a projection adapted to underlie the material fed to said dies, means upon said shaft for lifting said projection to complete the severance of material by said dies. 7

10. A feeding mechanism comprising, in combination. a feed roller, a gear for actuation thereof, a shaft upon which said gear and roller are mounted, a plate journaled and freely movable upon said shaft, a plurality of ratchets carried by said plate adapted to coact with the teeth of said gear, said ratchets being spaced from each other, a multiple plus a fraction of the circular pitch of said teeth whereby one of. said ratchets will come into action with lost motion less than the space between said teeth.

11. A feeding mechanism comprising, in combination a pair of standards, feed rolls carried by said standards, means for actuation of said rolls. a shaft upon which said standards are mounted for oscillation, resilient means pressing said standards towards a machine to be fed whereby said standards may yield to the push of severing material.

12. A feeding mechanism comprising, in combination, a machine to be fed having a frame, an oscillatory shaft fixedly mounted with relation thereto, feed mechanism adapted to be acttiated by said shaft, means for mounting said feed mechanism in yielding relation tovsaid frame and means for pressing said feed mechanism towards said frame whereby said feed mechanism may yield to the push of said severing material.

13. A feeding mechanism comprising, in combination, a machine to be fed having a frame, an oscillatory shaft fixedly mounted With relation thereof, feed mechanism adapted to be actuated by said shaft, means for mounting said feed mechanism in yielding relation to said frame means for pressing said feed mechanism towards said frame whereby said feed mechanism may yield to the push of said severing material, and an adjustably fixed stop for locating said feed mechanism in relation to said frame.

14. A feeding mechanism comprising, in combination, a frame of a machine to be fed, an oscillatory shaft fixedly mounted with relation to said frame, a second shaft fixedly mounted with relation to said frame, a feed mechanism mounted upon said second named shaft for oscillatory movement with relation to said frame, main and supplemental feed rolls, main and supplemental pressure rolls for said feed mechanism, levers mounted upon said second named shaft for act-nation of said main and supplemental feed rolls.

JOHN A. ROGERS.

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