US427125A

US427125A - Machine for making rolled forcings

Info

Publication number: US427125A
Authority: US
Publication date: 1890-05-06
Anticipated expiration: 1907-05-06

Description

(No Model.) 4 Sheets--She et' 1.

G. F. SIMONDS & J. J. GRANT. MACHINE FOR MAKING ROLLED roaemes.

No. 427,125. Patented May 6, 1890.

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v INVENTORS, 9 vzarui-s 1 [$72 13 an (No Model.) 4 Sheets-Sheet 2. G. 'F. SIMONDS & J. J. GRANT. MACHINE FOR MAKING ROLLED FORGINGS.

No, 427,125. Patented May 6, 1890.

WITNESSES: l/VVE/VTORS,

6 73 fiflimonds 4nd 70 1 I 414726 BY ATTORNEY (No Model.) I 4 Sheets-Sheet 3. G. F. SIMONDS & J. J. GRANT.

MACHINE FOR MAKING ROLLED PORGINGS.

- Patented May- 6, 1890.

WITNESSES:

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G. RSIMONDS & J. J. GRANT. MACHINE FOR MAKING ROLLED FORGINGS.

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UNITED STATES ATENT FFICE.

GEORGE F. SIMONDS AND JOHN J. GRANT, OF FITOHBURG, MASSACHUSETTS.

MACHINE FOR MAKING ROLLED FORGINGS.

SPECIFICATION formingpart of Letters Patent No. 427,125, dated May 6, 1890.

Application filed July 1.6, 1889. Serial No. 317,680. (No model.)

To all whom, it may concern:

Be it known that we, GEORGE F. SIMONDS and JOHN J. GRANT, 0f Fitchburg, county of Worcester, State of Massachusetts, have invented an Improvement in Machines for Making Rolled Forgings, of which the following description, in connection with the accompanying drawings, is a specification, like letters on the drawings representing like parts. This invention relates to a machine of the class represented in Letters Patent No. 319,752, dated June 9, 18S5,for making rolled forgings by means of dies such as illustrated in Letters Patent No. 319,754, of the same date, the present invention consisting mainly of improvements upon the machine shown in Letters Patent No. 319,752.

The purpose of the machine is to properly support, guide, and actuate the oppositelymoving platens that support the dies between which the forging is rolled to shape.

It has been found in the practical use of machines of this kind that it is necessary to guide the dies with extreme accuracy and precision, as the two dies act simultaneously upon the opposite sides of the blank, and in the rolling motion of the blank the part that has been shaped by one die is brought under the action of the other die, so that unless the two dies exactly register one may to a greater or less extent mar the work that has been done by the other. This calls for minute adjustment of the dies relative to one another in the machine, which adjustment is attained with far greater facility and accuracy by making the entire dies of the platen adjustable with relation to one another than by attempting to adjust the dies themselves upon the platen for bringing the dies into final accurate registration one with the other.

The invention consists in a machine having means for effecting the several adjustments of the die-platen guides relatively to one another, and also in the mechanism employed for actuating said platens, as will now be described.

Figure 1 is a front elevation of the machine with a portion broken out to show the devices for adjusting one platen-guide toward and from the other; Fig. 2, a rear elevation of the main part of the machine with a portion of the framework broken out to show the main shaft, the bearing-boxes of which are shown in longitudinal section; Fig. 3, an end elevation with a portion of the framework broken out and shown in section to disclose the platen-operating shaft and wormgear thereon, which latter and the bearings for said shaft are shown in section; Figs. 4 and 5, details of the devices for adjusting the bearings of the platen actuating and supporting shaft; Figs. 6 and 7, details illustrating the devices for effecting the transverse adjustment of one of the platen-guides relative to the other, and Fig. 8 a detail showing a front elevation of a portion of the clutchshipper mechanism used for reversing the direction of movement of the main actuatingshaft of the machine.

The machine differs in general arrangement from that shown in Patent No. 319,7 52 in that the die-platens Work in a vertical instead of a horizontal plane, such arrangement having been found in practice to be better.

The working parts are supported on the bed or base a, upon which are mounted two heads Z) and 0, provided with suitable guides for the platens d 01 upon which the dies, (not shown,) properly shaped in accordance with the forgings to be made, are rigidlyfastened. The said die-platens are provided on their rear side with racks e and bearing-surfaces f,

which co-operate with gears g and rollers h, respectively, on the platen-shafts c, the said rolls h and bearing-surfaces f sustaining the thrust or pressure that is brought upon the dies in the work of forging and relieving the guide-surfaces of the heads I) c from such pressure, so that the said guide-surfaces merely operate to control accurately the line of -movement of the platens and are relieved from the wear that would result if they also afforded the main support of the platens against the work. The platens may thus have an easy fit in their guides in the heads I) c, and in order to remove the said guides from any pressure or wear further than is necessary to merely control the line of movement of the platens it is necessary that the rollers it should be capable of minute adjustment with relation to the platen-guides. This is effected by means of the devices best shown in Figsh i, 5, and 6. I

The bearing-boxes 7c are longitudinally movable in guides in the heads I) and c and bear at their sides away from the platens, as shown at h Fig. 5, against cams or eccentrics k (shown in dotted lines, Fig. 5,) formed at the end of a shaft or spindle 70, provided near its middle with worm-gear teeth 76, (see Fig. 4,) meshing with a worm or screw-thread (see Fig. 5) on a bolt it, that turns in a thimble or bushing k fastened in the head 0. Thus by turning the bolt 70, which is shown as provided wit-h a square head for facilitating this operation, the shaft or spindle 7c is turned with a slow uniform motion and by the action of the cams'or eccentrics k affords an exceedingly minute and accurate adjustment of the box 71; of the platen-operating shaft 2 which may thus be set so that the rollers 71. receive the entire thrust orpressure of the work upon the dies and platens, while the latter run freely in their guides.

It is necessary that the heads I) and 0 should be adjustable toward and from one another to gage accurately the space between the dies, which determines the diameter of the forged article. This is effected by adjusting the head I) longitudinally upon its supporting bearings or ways on the bed a by means of a screw operated by a hand-wheel N, such adj ustment being substantially like that of the upper platen-guide in the machine shown in Patent No. 319,7 52, before referred to. It is also necessary that the guides should be adjusted with extreme accuracy transversely to their line of movement or in the direction parallel to the axis of the piece being forged, and in order to effect such accurate adjustment conveniently and quickly the head 0 is made movable transversely to the bed a upon the supporting or guiding surface a thereof,

(see Figs. 6 and 7,) the said head being re strained from longitudinal movement on the said bed by means of keys or guides a The transverse movement of the head 0 need be only veryslight, as the dies are fastened to the platen so as to be very nearly in accurate registration; but if it should be found upon trial in the machine that they did not exactly register they can be brought into exact registration by the transverse movement of the head 0, which is effected by means of an adjusting-bolt 0 (see Figs. 6 and 7,) having a thread engaging a thread in the head 0, and said bolt being restrained from longitudinal movement in the base aby means of abushing c fixed in said base and forming the bearing for'the bolt 0 In the operation of the machine the platens d d move simultaneously in opposite directions, and as the gears g have opposite sides engaging with the racks cof said platens the said gears and their shafts h must rotate in the same direction and must both reverse their direction of rotation at the end of each reciprocating movement of the die-platens. In the machine shown in the former patent the said shafts were driven by spur gears, and in order to cause them to rotate in the same direction they were connected by an intermediate gear, power being applied directly to one only of said shafts and being transmitted through the intermediate gear to the other shaft. This method is objectionable, owing to the unavoidable lost motion involved by the use of gearing of this kind, as well as for several other reasons. These objections are obviated by the present machine, in which the platen-operating shafts 71 are provided with worm-gears i meshing with a worm i on the main actuating-shaft 1' of the machine. (See Fig. 2.) Both the said platenoperating shafts i are thus actuated independently of the main shaft, although in exact unison with one another. The said shaft is inelosed in a trough formed in or supported upon the base a of the machine, and the gears i are inelosed in a removable cover or case a this construction enabling the shaft and worms 7? to be practically immersed in oil or other lubricant, so that the worm-gearing runs smoothly and quietly and with but little wear.

In order to provide for the quick stopping and reversal of movement of the actuatingshaft 1' and to keep the movement always under perfect control of the operator, the said shaft is provided with an improved clutch mechanism, which will form the subject of another application, but may be briefly described as follows: The said shaft has mounted on bearings, so as to turn independently of the shafting, two' driving-pulleys 12. 71 which are rotated in opposite directions by belts or otherwise. Between the said pulleys and connected with the shaft, so as to rotate positively therewith, is a friction-drum n shown as connected with the shaft by a pin a, (see Fig. 2,) passing through a transverse opening in the shaft, which is slightly elongated, so as to permit a slight longitudinal movement of the drum n on the shaft. The said shaft is made tubular for a portion of its length and contains a slide-rod a, connected at one end with the pin at and drum 71 and at the other end with a grooved collar or shipping-hub n that is itself engaged by a fork 12 (see Fig. 3) 011 a lever n pivoted at n on the frame-work. Thus by throwing the lever n in one or the other direction the drum n is moved toward one or the other of the pulleys n n and engaged therewith by the friction-surface 02 around the interior of the pulley. (See Fig. 2.)

The shipper-lever n is operated by means of a slide-rod psuch as shown in Figs. 1 and 8--connected with an arm 19 on a rock-shaft 23 provided with a lever 19 having a handle 12 to be manipulated by the operator of the machine. The said shipper-actuating rod 19 also contains a brake for the main shaft, as follows: The said brake consists of a frictionsurface 0, (best shown in Figs. 2 and 3,) that engages the surface of the drum 42 connected with the main shaft, and is operated by a lever 0*, pivoted at 1- as best shown in Fig. 3,

The said lever is acted upon by a spring 0*, (see Figs. 1 and 8,) which tends to move it in the direction to apply the brake to the drum 01 The said spring is permitted to act when the shipper is in intermediate position and the drum n consequently disconnected from both driving-pulleys; but the brake is removed when the shipper is moved from said intermediate position in either direction, as follows: The slide-bar 19, that operates the shipper-lever "a has a recess 19 which, when the said rod and shipper-lever are in intermediate position, comes beneath a projection r on the brake-lever 0', as shown in Figs. 1 and 8, and thus permits the spring r to act and apply the brake. At either side of the recess p the slide-bar p is inclined or forms a cam, which, when the said slide-bar is moved in either direction from the intermediate position, engages the projection 7' and lifts the end of the lever o against the stress of the spring 7 and thus relieves the pressure of the brake against the drum n The main shaft a is thus stopped or caused to move in either direction, as required, by bringing the hand-lever p to an intermediate position (represented in Fig. 8) or by moving it up or down therefrom.

In order to prevent. danger of driving the platens too far in case the operator should neglect to move the hand-lever 13 the said lever is provided with a tappet-arm 19, that is engaged by tappets 15 29, carried by a toothed disk i actuated by a pinion of one of the shafts 1, as shown in Fig. 8. The disk 25 thus reverses its movement whenever the movement of the main shaft is reversed, and the tappets t t are so set that when the main shaft is moved a suflicient distance in one direction to complete the corresponding traverse of the die-platens the corresponding tappet will engage the tappet-arm p, and thus automatically move the shipper to the intermediate position and stop the machine, when said tappets will prevent the machine from again being started in the same direction, although the operator can,by continuing the movement of the hand-lever so as to carry the tappet-arm away from the tappet that has engaged it, reverse the movement of the main shaft,which will then continue until the other tappet engages and stops it, unless the operator should desire to stop the machine earlier. We claim 1. The combination of the supporting bed or base with the two platen-guides, one adjustable toward and from the other on said base and the other laterally adjustable on said base with the relation to the line of adjustment of the first-mentioned platen-guide, and the die-carrying platens operating in saidguides, substantially as described.

2. The combination of the reciprocating platen provided with a rack and bearing-surfaces at the sides of the said rack with an operating-shaft provided with a pinion meshing with said rack and rollers co-operating with the bearing-surfacesof the platen, adjustable bearings for the said shaft, and an adjusting shaft or spindle provided with cams engaging said bearings and with worm-gear teeth and a worm cooperating with said teeth, substantially as and for the purpose described.

'3. The combination of two oppositely-reciprocating platens provided with rack-bars, platen-operating shafts, each provided with pinions meshing with said rack-bars, and also provided with worm-gears, and a main actuating-shaft provided with a worm mesh in g with said worm-gears, substantially as and for the purpose described.

4. The combination of the main bed or base and platen-guides supported thereon and oppositely-reciprocating platens, each provided with a rack-bar, with platen-operating shafts having bearings in said platen-guides and each provided with a pinion meshing with the rack of the corresponding'platen, and also provided with worm-gears, and the main shaft provided with a worm meshing with said wormgears of the platen-operating shafts,

the main bed having a trough or channel inwhich said main shaft works, and a removable cover inclosing said worm-gears, substantially as described.

In testimony whereof we have signed our names to this specification in the presence of two subscribing witnesses.

GEO. 'F. SIMONDS. JOHN J. GRANT.

Witnesses:

Jos. P. LIVERMORE, M. E. HILL.