US1550025A - Forging machine - Google Patents

Description

5 2 0. 5. 1l N. E S s A L G E C.

Aus. 18. 1925,.

FORGING MACHINE 6.' T6/assen a waag) x Aug. 1s, 1925.

1,550,925 v `c. E. GLAssEN A. I

FORGING MACHINE Filed Dc. 2, 1920 Sheets-Shut 2 Aug. 18, 1925. 1,550,025

c. E. GLAssEN FORGING MACHINE med Deo( z, 1920 Patented Aug. 18, 1925.

UNITED lSTA'IYES CHARLES E. GLASSEN, OF WILLISVILLE,

ILLINOIS, ASSIGNOR, BY MESNE`IASSIGN- MENTS, T COLUMBIA QUARRY COMPANY, OF ST. LOUIS, MISSOURI, A CORFORA- TION OF MISSOURI.

FORGING MACHINE.

Applicationled December 2, 1920. Serial'N'o. 427,710.

[o all whom t may* concern.: v

Be it known that I, CHARLES E. GLAssEN,

i a citizen of the United States of America,

forging machines, and more particularly to y a forging machine having a die provided with an opening conforming to the shape of an article to be molded therein. One of the objects of the invention is to produce a simple and highly eflicient machine of this kind whereby portions of the metal to be forged are forcibly bent into the die.

More specifically stated, an object is to produce a forging machine whereby tools, such as bits used in certain types of mining machines, may be readily shaped and sharpened. The new machine may be used to re-shape and sharpen old bits, or to shape and sharpen new bits. By using the machine to re-shape and sharpen old bits, the labor heretofore incurred by sharpening the bits is avoided, and at the same time these old bits are accurately re-shaped. All of this is accomplished by a bending operation, whereby projecting portions of the tool, or

bit, may be gradually forced into the die without materially disturbing or changing the grain of the metal.

The particular machine about to be described comprises a rotary bending roll located adjacent to a movable die. A bar of metal to be forged is inserted into the die and thereafter projected to engage the bending roll, `and the die is shifted relative to the roll, so as to gradually bend the projecting portions of the metal into the die. The surplus metal is automatically severed to produce a sharp cutting edge on the tool.

With the foregoing and other objects in view, the invention comprises the novel construction, combination and arrangement of parts hereinafter more specifically described and illustrated in the accompanying drawings wherein is shown the preferred embodiment of the invention. However, it is to be understood that the invention comprehends changes, variations and modifications which come within the scope of the claims hereunto appended.

Fig. I is a vertical section illustrating a forging machine embodying the features of this invention, showing the die in one of its eXtreme positions, and showing an old worn bit in the die.

Fig. II is a fragmentary section showing a plainbar arranged in the die.

.F ig. II@L is an enlarged detail view showing the cutting element of the die.

Fig. III isa view similar to Fig. .I showing the die in the position it occupies at the beginning of the bending operation.

Fig. IV is a vertical section taken approximately on the line IV IV, Fig. III.

Fig. V is a view similar to Figs. I and III, showing the die in position it occupies at the end of the operation.

Fig. VI is a front elevation of the machine, with the lower left hand portion thereof broken away.

A designates a housing consisting of two sections l secured together at their upper and rear margins by means of bolts 2. The upper front portion of this housing is provided with a socket adapted to receive a bearing 3 in which a bending roll 4 is rotatably mounted, said roll being provided with journals which extend into the bearing, and

also with a peripheral rib 5 adapted to engage the work.

6 designates a die holder in which a die 7 is mounted. The die is seated in the die holder, and keys 8 may be driven between these elements to firmly secure the die. v The die is `provided with an opening 9 conforming to the article tobe molded therein, and this opening extends entirely through the die. The die holder 6 is also provided with an opening which allows the article to extend below the same. In Figs. I, III and' V, the article to be acted upon is a bit B, and in these views I have shown how an old bit may be re-shaped and sharpened, as will be hereafter described. This `bit is provided with an extended cutting element Z2 adapted to engage an inclined wall 10 leading to the sharp upper edge of a cutter 1l at the top of the die. IVhen an old bit B is dropped into the opening 9 (Fig. I) its extended portion b will engage the inclined wall 10 ofthe opening 9, so as to limitthe downward motion of the bit. The opening in the die is preferably formed at an angle, so that the bit B will lie at a corresponding angle, as shown in the drawings, with its top face in a horizontal plane. After the bit has been inserted as shown by Fig. I, the die is moved to the right, and the bit is shifted in an upward direction so as to project from the top of the die, where itl will be engaged by the bending roll 4, as will be hereafter described. rlhe top faces of the die and die holder are preferably provided with a groove 12 adapted to receive the peripheral rib 5 on the bending roll, and the bit B can be projected into this groove as shown by Fig. HI.

The die holder 6 is .supported by a parallel motion device comprising rocker arms 13 pivotally supported on rods 14 and pivotally connected to the die holder by means of rods 15. The centers of pivot rods 15 at the upper ends of rocker` arms 13, lie in the same horizontal plane. The centers of the lower pivot rods 14 at the lower ends of the rocker arms are likewise in a horizontal plan-e. By supporting the die holder and die in this manner, they may be reciproeated below the bending roll 4, without tilting the die 7, the latter being retained in a horizontal position so as to properly cooperate with the bending roll 4.

rlhe means for reciprocating` the die and die holder comprises a rotary power shaft 16 mounted in the housing A and provided with a crank 17. 18 designates a connecting rod through which motion is transmitted from the crank 17 to the die and die holder, said connecting rod being pivoted at 19 to an extended portion of the die holder.

A lever E, fulcrumed on one of the pivot rods 15 is provided with a short thrust arm 2O located below the die holder 6 to engage the bit B and a long operating arm 21 to which a weight 22 is secured. A roller 23, extending from the long arm 21, is adapted to rest upon a stationary abutment, or cam 24, as shown by Fig. I, for the purpose oli' temporarily retaining the thru-st arm 20 in a predetermined position relative to the bit B.

The means for lifting the weighted lever arm 21 comprises a bell crank lever F, pivotally supported at 25, as shown most clearly in Figs. l and Hl, and provided with a roller 26 at its lower end. The bell crank lever F includes an operating arm 27 adapted to be engaged by a retaining pin 28 and also by a restoring roll 29, both of which are secured to a wheel 30 on the rotary power shaft 16. For reasons to be hereafter given, the centers ol pin 28 and roll 29 may be equidistant from the center oli' wheel 30, but the roll 29 is larger in'diameter than pin 28.

When the parts occupy the positions shown by Fig. l, an old worn bit B may be inserted into the die 7 so as to extend below the same, and the lower end of this bit will then lie above and adjacent to the thrust arm 20. At this time the weighted lever E is held in the position shown by Fig. I for the reason that the roll 23 is engaged with the stationary abutment 24. In response to a rotary motion of the power shaft 16, the crank 17 will move upwardly from the position shown by Fig. l to the position shown by Fig. HI, thereby shitting the die 7 and lever E to the right Jfrom the position shown in Fig. I. During this period of the operation, the bit B will approach the periphery of bending roll 4, and the roll 23 will pass from the stationary abutment 4, thereby allowing the weighted lever arm 21 to drop to the position shown by Fig. Hl. At this time, the upper right hand corner of the bit B is located under bending roll 4 and to the left of an imaginary vertical line drawn through the center of said bending roll 4. Therefore, when the weighted lever arm 21 drops to the position shown by Fig. Ill, the short thrust arm 20 will strike the bit B and forcibly project the same into engagement with bending roll 4. The upper portion or' the bit B is thus projected from the die to properly engage the bending roll.

As the crank 17 continues in motion from the position shown in Fig. lll, the die 7 and bit B move to the right and eventually occupy the positions shown by Fig. V. During this stage of the operation, the projecting portions of the bit are gradually forced into the die, and the surplus metal is severed at the sharp edge of the bit when the cutter 11 lies directly below the axis or' roll 4, as shown in Fig. V. The upper portion of the bit is thus subjected to a very hiojh degree of pressure, whereby the cutting` edge of the bit is sharpened and rcshaped, so as to conform precisely to the opening in the upper portion of the die. rlfhe bending operation performed by this device does not materially disturb or change the grain ot the metal. rlhe necessary high pressure can be readily obtained by using a crank to transmit motion to the die holder 6 supported by rocker arms 13.

Alter the work has been completed (Fig. V) a continued movement ot crank 17 will restore the. die and die holder to the posi tions shown by Fig. l, and the bit is then ren'lovcd from the die.

Owing to repeated re-shaping and sharpening operations, the old bits B will be of various lengths, and all of these bits will be properly acted upon, `tor the bit in the die is forcibly projected onto the roll at a predetermined period, by the weighted lever E. lVhen this lever is released, its weighted arm 21 Vmoves dowinvardly7 lll) until it is stopped by the engagement of the bit B with the periphery of the bending roll, so the compa `atively short old bits, as well as the longer ones, will all be properly projected to engage the bending roll at a predetermined period in,l the operation. The weighted lever and the elements associated directly therewith, may be termed a compensating device, for the reason that the variable' downward movement of weighted lever arm 21 compensates for variations in the lengths of the bits.

l will now point out the manner in which the weighted lever is released from and restored to the stationary abutment 2li. When the parts are moving from the positions shown by Fig. l to the positions shown by Fig. Ill, th-e retaining pin 28 on wheel 3() cooperates with bell crank F to elevate its roll 26 from the positionv shown by full lines, in Fig. lll to the position shown by dot and dash lines. At the same time, the weighted lever E is moving to the right so as to displace its roll 23 from the abutment 2a. YWhen the roll 23 passes from abutment 24.-, the roll 26 occupies an elevated position to prevent immediate release of the weighted lever, and at a predetermined period, the retaining pin 2S passes from bell crank F so as to release the weighted lever, permitting its weighted arm 21 to drop while its roller 23 occupies a position at the rear of stationary abutment 2li. Some time thereafter, when the restoring roll 29 engages bell crank F (Fig. V) the crank 17 is beginning its downward motion, and the weighted lever E is beginning to ino-ve to the left with the die holder 6 to which it is pivotally connected, while the restoring roll 29 is moving upwardly to elevate the weighted arm 21. ln response to this peculiar combination of mot-ions, the long weighted arm 21 is rapidly elevated while it is slowly moving to the left from the position shown in V. As a result, the roll 28 moves upwardly at the right of sta.- tionary abutment 24., and it is held in an elevated `position by the restoring roll 29 and bell crank F until the said roll 22 is moved forwardly so as to overlie abutment 2d.

y iVhen the bell crank lever F is released from the retaining pin 28, as suggested by IH, the roll 23 must drop past the stationary abutment 2li, but when said bell crank F is afterwards released from the restoring roll 29, the roller 23 on the weighted lever must drop onto the stationary abutment 24. W7 hen cranlr 17 occupies the upright position shown by Fig. lll, the retaining pin 28 is positioned to release the lever F, and one-half of a revolution of the crank will be required to move the restoring roll 29 to this position. For these reasons, if the centers of retaining pin 28 .and restoring` roll 29 are equidistant from the center of shaft 16, the roll 29 should be relatively large in diameter, soit will cooperate with bell crank 27 to release the veightcd lever when the roll 23 lies directly above abutment 24.

in Fig. 1l l have a plain bar B (instead of an old bit) located in the die 7. When a plain bar of this kind is inserted, its downward motion will be limited by the thrust arm 20, and the projecting upper end of this bar will engage the bending roll e before the weighted lever E is released, so the thrust arm 20y will serve as a stop for the plain bar but it will not project said bar from the die.

l claim:

1. ln a forging machine, a die having an opening conforming to the article to be molded therein, a bending member in the form of a rotary'roll facing said opening `and located adjacent thereto so as to engage proj ecting portions of the article, and means whereby said die is reciprocat-ed in a line approximately at a right angle to the anis of said roll so as' to gradually bend said projee-ting portions into said opening, said means including a die-holder, a parallel motion device supporting said die-holder and comprising a pair of pivotally mounted rocker arms pivotally connected to said dieholder.

2. ln a forging machine, a die having an opening conforming to the article to be molded therein, a bending member in the form of a rotary roll facing said opening and located adjacent thereto so as to engage projecting portions of the article, means whereby said die is shifted relative to the axis of said roll so as to gradually bend said projecting portions into said opening, said means comprising a pivotally mounted rocher arm pivotally supporting said die, and a cutter located at one edge of said opening so as to cooperate with said rotary roll in severing the excess material from said article.

In a. forging machine, a die member raving an opening conforming to the article o be molded therein, a bending member acing said opening, a compensating device, Iaid con'ipensating device being adapted to an end of the article to be molded, nd said compensating device being so located relative to said bending member as to permit the article being molded to be gripped between a portion of said compensating device and said bending member during the entire bending operation, and means for moving one of said members relative to the other, so as to bend said projecting portions into said opening.

al.. in a forging machine, a die member having an opening conforming to the article to be molded therein, a bending1 member in the form of rotary roll facing said opens ing, a compensating device, said compensating device being` adapted to engage an end oft the article to be molded and said compensating device being so located relative to said bending member as to permit the article being molded to be gripped between a portion ot said compensating device and said bending member during the entire bending operation, and means for moving one olf said members relative to the other, so as to bend said projecting portions into said opening.

5. ln a forging machine, a oie member havingan opening conforming to the article te be molded therein, a bending member in the torrel a rotary roll l'acing said opening, a compensating `device comprising a thrust device adapted to engage the article in toe die member and automatically oj erated means for shitting said thrust device to project the article troni said die niember, the periphery o'll said bending member being` located adjacent to said opening so as to eiigage projecting portions of the article whereby the article being` molded is gripper between said con pensating device and the periphery et said bending member during the entire bending operation, and means tor moving` one of said members relative to the other, so to bend said projecting portions into said opening'.

in a forging machine, a die member having an o iening conliorming to the article to be molded therein, a bending member in the form et a roar roll 'lacing said opening, a compensati e comprising a levelI adapted to engage t article in the die and automa-ti lall f operated means wnereby said lever is actuated to project the artiere Yfrom the die member, the periphery ot said bending member being located adjacent to said opening so as to engage projecting portions olf the article whereby the arti le being molded is gripped between said compenfizfing device and tie periphery oit said bending member durii"A the entire bendxtion, ani ineens noving one ers reir 7e to the Geier, so as to bend opening.

tin into w the die, a ie and liaopeninr" a coinpensa'ing device a thru`v adapted to eno e1o the article and means Yfor shitting said thrust menibe to ir ject the article onto the periphery se' id bending roll whereby the article be 'i-ippet between said compeii l i 7i N l l the peripl y o. :end the be, n op* nro'ectins' portions ot the article into said L x) member arranged below said opening to engage the .lower end of the article, said lever beit provided with a weight whereby said th ,s i. member is elevated to project the upper end ot' said article onto said bending r, neans :tor retaining said weight in an e position, and means ior shifting lever anc. at the same time displace the die under said bending roll.

9. In a forging machine, a die support, a die secured therein, said die having an opening through which the article to be forged is inserted to einend below the die, a bending roll located above the die and facing said opening, a compensating device comprising a lever pivotally connected to said die support and provided with a thrust member arranged below said opening to engage the lower end oit the article, said lever being provided with a weight whereby said thrust member is elevated to project the upper end oit said article onto said bendingl roll, means lor retaining said weight in an elevated position, said means comprising an abutment adapted to be engaged by a portion et said lever, a lifting device whereby said weight is lifted to locate said portion otl the lever above said abutment, and means for shitting said die and lever to release said portion of the lever from said abutment.

l0. ln a forging machine, a die support, a die secured therein, said die having :in opening through which the article to be Yforged is inserted to extend below the die, a bending roll located above the die and facing said opening, a compensating device comprising` a lever pivotally connected to said die support and jrovided with a thrust member arranged below said opening to ene, the low fr end ot the article, said lever provided with a weight whereby said thrust member is elevated to project the upper end ot said article onto said bending roll, means 'for retaining said weight in an elevated p sition, said means con'iprising an abutment adapted to be engaged by a portion et said lever, a lifting' device whereby said weight is liilced to locate said portion et the lever above said abutment, and means for shitting said die and lever to release said portion of the lever from said abutment, the last inen'ioned means including a cranl: tor imparting a reciprocatory motion L A to die holder and a parallel motion device whereby said die holder is guided in a line approxin'iately at a right angle to the axis or said bending roll.

ll. in a forgingl machine a die having an opening conforming` to the article to be molded therein, a bending roll facing said opening, a compensating device comprising a thrust member adapted to engage the article in the die and means for shifting said thrust member to project the article from said opening, the periphery of said bending` roll being located adjacent to said opening so as to engage projecting portions oi the article Where-by the article beingl molded is gripped between said compensat- Y ing device and the periphery of said bending` member during the entire bending ope 2.- tion, and means whereby said die is shifted in a line at an angle to the axis ot' said bending roll so as to gradually bend said projecting portions into said opening.

In testimony that l claim the foregoing I hereunto affix my signature.

C. E. GLASSEN.

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