US1929865A - Cut-off and transfer mechanism - Google Patents

Description

Oct. 10, 1933. l.. s. BURBANK 1,929,865

CUT-OFF AND TRANSFER MECHANISM Original Filed June 7, 1928 2 Sheets-Sheet l 1 f fi/ ff ,j f@ "77` Oct. l0, 1933. L, sY BURBANK 1,929,865

UUTFF AND TRANSFER HECHANISI Original Filed June '7, 1928 2 Sheets-Shqet 2.

IN VEN TOR. Lou/5` 5. BURA/wf, DECEASED,

Patented Oct. 10, 1933 UNITED STATES PATENT@ oFFcE CUT-OFF AND TRANSFER MECHANISM Original application June 7, 1928, Serial No.

283,469. Divided and this application November 3, 1932. Serial No. 641,063

137 claims. (o1. 10-25) This invention relates to new and useful improvements in cut-offA and transfer mechanism of the type that is particularly `adapted for upsetting, heading machines, or the like.

It is the object of this invention, among other things, to provide simple and eective means for cutting. oif a portion of a rod length or the like, holding such portion (now a blank)4 so cut oi, and carrying it away from the cut-ofi position for a subsequent operation, and when returned for the next cut-off operation, the rod has already been advanced a predetermined distance and is in position for the cut-off operation.

Heretofore it has been the practice tol feed a rod length only when the cut-ofi knife is in its retracted position, after which the cutter begins its cut-off motion and severs the projecting end of the rod and carries it to another station. From the time the stock is cut off until the cutter returns again to its retracted position there is no feed of the rod length. This practice requires that the cutter be held in its retracted position a sufficient length of time to permit the rod length to advance a predetermined distance in front thereof before the-cut-oif movement begins. The time thus consumed, during the dwell of the cutter, reduces the speed rof the machine as well as its output.

With this new` and improved cut-oi and transfer mechanism there is no dwell of the cutter as the rod is fed into its predetermined position ready to be cut off before the cutter bar returns to its retracted position. The rod may be advanced while the preceding cut-off portion or blank is carried into position for a subsequent operation, or during the return of the mechanism, or during any portion of its reciprocating stroke, as may be desired. If the cut-off portion or blank is of substantial length more time will be required for the feed of the rod than for a short portion. The variation of length yof feed, as well as the necessary time therefor is permitted in this invention, as the relative timing of the feed always assumes that the feed motion is complete as the cut-off mechanism advances from its retracted position without a dwell. The feed of the rod is not interrupted or interfered with by the movement of the cut-off and transfer mechanism.

Referring to the drawings, in which like nu- Vassociated therewith, taken generally merals of reference indicate like parts in the several figures;

Figure 1 is a fragmentary, sectional plan view of a portion of an upsetting machine, header, or the like, having the cut-off and transfer mechanism disclosed, associated therewith. y

Figure 2 is a fragmentary sectional elevation of a portion of an upsetting machine or header looking toward the front of the die block;

Figure 3 is an enlarged sectional elevation of the forward end of the cutter bar and the knives -upon line 3-3 of Figure 1;

Figure 4 is a sectional view of one of the cutter knives and a portion of the cutter bar, taken generally upon line 4 4 of Figure 3; l

Figure 5 is a view similar to Figure 3, with the knives in their open position;

Figure 6 is a perspective View Y of oneofl the knives; and

. o l Figures '7, 8 and 9 are views of another form of the invention wherein the knives are supported in an independent member, rather than in the cutter bar, as shown in the other gures.

Inthe drawings, 10 indicates the body of a header or the like of a conventional type, having a die block l1 suitably mounted therein and supporting a cut-off die l2, through which a rod length 13 is intermittently fed, by any one of many suitable feed devices, against a stop 14.

Within the body member a gate l5 is reciprocated in a manner well known in the art and carries one `ormore punches 16 and 17, which move toward and away fromnpsetting dies 18 and 19. Actuated by suitable mechanism of any .desired form, so as to reciprocate ina pathl at substantially a right angle to the face of the die block 1l, is 'a cutter bar 20 and associated parts. in the operation of such mechanism the cutter severs that portion of the rod 13, between the stop 14 and face of the die 12, and thereafter the cut-off portion is transferred to a position between the punch 16 and die 18, substantially as shown by broken lines in Figure 1.

The invention herein relates particularly to the devices for intermittently cutting off portions of the rod 13 and transferring such cut-off portion to the position above mentioned.

An opening 21 extends rearwardly from the inner end of the cut-off bar 20 a distance suiiicient to clear the rod 13 when in its forward position. This inner end is recessed or socketed upon opposite sides of the opening 21 at substantially a right angle thereto, as indicated at 22. Adjacent thereto are the stop shoulders 23 and through the walls of the cut-off bar are suitable openings 24, each of which contains a spring 26and is closed at the outer end by a plug 25..

This invention contemplates the use of companion knives 27, each of which has a knuckle portion 28 that is movable within a socket 22. Each knife has a stop shoulder 33 which abuts against a stop shoulder 23 when in one of its positions, and a stop face 34, which contacts with a similar face on the companion knife when the knives are in their closed'position', substantially as shown in Figure 3. Each knife is provided with a semi-circular opening 35, which co-operate to form an opening of substantially the same size and shape as the rod 13 when the knives are in their closed position. Adjacent to the opening 35 the knife is cut away to form the walls 36, which form an outwardly daring throat. That portion of the knife adjacent to the opening 35 may be of less thickness than the knuckle portion 28, as

shown in Figure 4, with the cutting edge of the knives on the same plane as that of 'the face 37. The knives are held against outward movement by a key 38 that projects within a suitable recess inthe cutter bar and is held against dislodgment by a plurality of screws 39.

In Figures 1 and 2 the cutter bar is shown in its substantially retracted position, and in the same figures, and also in Figure 3, the knives are shown in their closed positions and ready to cut off that portion of vthe rod, which projects through the opening formed by the recesses 35. In this position the stop shoulders 33 of the knives are in contact with the stop shoulder 23 of the cutter bar and the stop faces 34 of the knives are in contact with each other. This makes a rigid, strong structure that will withstand the cut-off strain. During the inward movement of the cutter bar the knives sever that portion of the rod projecting beyond the face of the cut-off die 12 and hold such cut-off portion therebetween during its further -travel,'which continues until the cutoff portion, (now a blank), is in position between the punch 16 and die 18. The position of the cut-off portion v(now ,a blank) and of the knives, is shown by dotted lines in Figure 1. In Figure 8 there is illustrated one of the relative positions of the rod 13-'wher1 the parts are in their forward' position, yand wherein it will be noted the rod projects through the opening 21. When the cutter bar is being withdrawn from its forward position the angular walls 40 of the knives engage the rod 13. These are thereby moved about the axes of the knuckle joints thereof and pass over the rod until the semi-circular openings 35 are in register, at which time the springs 26 cause the knives to move toward each other and surround and grip the rod 13 within said openings.

The open position of the knives is shown in Figure 5 with the rod 13 therebetween. Afterthe knives have severed the projecting portion of the rod and carried it beyond the end thereof, the rod is advanced by the feed devices through the opening 2l in the cutter bar until it engages the stop 14. There is nothing to interfere with this movement ofthe rod during the reciprocation of the cutter bar.

In Figures 7, 8 and 9, the knives 2'7 are supported in a block 41, which is` independently mounted in the cutter. bar 20, and provided with bar. 'The cutter bar 20 is shortened upon one side an opening 50 which is in register with the opening 21 in the cutter bar. Otherwise the construction and operation of the knives is the same as that shown in the previous figures. To accommodate this block 41 the forward end of the cut- S0 ter bar 20 is provided with a recess 42.

The block isv rigidly held by a key 43 and wedge 44, in a'well known manner, vassisted by the tongue 45, which projects into a recess 45 in the cutter so that the wall 49 thereof will clear other parts.

As an additional means of anchoring and securing the .block 41, the latter is provided with a lip 47, which rests upon a shoulder 48 cn the cutter bar.

The foregoing description is directed solely to the constructionsA illustrated, and therefore, the privilege of resorting to all mechanical changes to which the invention is suitable, is reserved, the invention being defined and limited only by the appended claims.

I claim:

1. In mechanism of the character described, wherein a rod is advanced through a cutting die; means for cutting off that portion of the rod projecting beyond the face of the die and transfervring it to an adjacent station, said means permitting movement of the rod beyond the face of the cutting die during the transfer travel of said cutoff portion, the cutting element being composed l of companion knives each of which has a recess, which in their closed position form an opening of substantially the same size and shape as the rod, and walls on the knives which engage the rod, if projecting beyond the face of the cutting die, durlli) ing the withdrawal of the cutting means from the-station to the cut-off position and during such engagement cause the knives to` move relatively toeach vother until said recesses are in substantial register withthe-rod.

2. Inl mechanism of they character described, wherein a rod is advanced through a cutting die; a slotted member movable transversely of the cutting die and across the face thereof; and cutting means connected with said member adjacent l?) to one end of the slot, composed of parts independentlyconnected with the member and movable-toward and away from eachother, the parts ofv said-cutting Ameans moving away from `each other and passing over the rod during the return 125 movement `of the'member if the rod is then projecting. beyond. the .face of the cutting die, said parts when in positionfor the cutting operation having` contact with-each other and an abutment face upon the saidv member, whereby to form a rigid unyielding cutting means that will withstand the cutting strain.

3. Inl mechanism of the character described, wherein a rod-is advanced through a cutting die; a member movable ltransversely of the cutting die and hav-ing a recess in one end thereof and an opening adjacent thereto at an angle to the recess; a vblock projecting into said recess and having an opening therethrough which registers with the opening in said member; means, as a key or the like, for. securing said block in said member; a knife having a movable connection with the block upon each side of the opening therein which in their closed' position provide means for severing that portion of the rod projecting beyond the face of the cutting die.

4. In mechanism of the character described, whereina rodis advanced through a cutting die;

a member movable transversely of the cutting die; a. block separably secured in said member Cil and during the travel thereof movable across the face of the cutting die, said blockl and member having openings therethrough in register with each other; plural part cutting meansl movably associated with the block at the forward end of the opening, which means in one of its positions severs that portion of the rod projecting beyond the face of the cutting die, at which Vtime each of said plural parts is held rigid against movement by an engagement with an abutment face on the block.

5. In mechanism of the character described, wherein a rod is advanced through a cutting die; a member movable transversely of the cutting die; a block secured in said member; and plural part cutting means movably associated with the block for severing that portion of the rod projecting beyond the face of the cutting die, said block and member each being provided with a slot registering with each other and in rear of the cutting means and through which the rod is advanced when projected beyond the Vface of the cutting die. l

6. In mechanism of the character described, wherein a rod is advanced through a cutting die; a member having an opening therein movable transversely of the cutting die and across the face thereof; a knife having a movable connection with the member upon each side of the opening, said knives when closed being adapted to sever that portion of the rod projecting beyond the face of the cutting die and tightly engage the same when so cut off and carry the cut-off portion to an adjacent station, at the same time permitting the rod to be projected beyond the face of the cutting die and through said opening.

7. In mechanism of the character described, wherein a rod is advanced through a cutting die; a member having an opening therein movable transversely of the cutting die and across the face thereof; a knife having a movable connection with the member upon each side of the opening; and yielding means exerting pressure against each knife, whereby to move the same toward and in contact with each other, each of said knives having a recess therein, which when the knives are together form an opening of substantially the same size and shape as the rod and of sufficient length to support the cut-off portion of the rod during the movement of the member.

8. In mechanism of the character described, wherein a rod is advanced through a cutting die; a member having an opening therein movable transversely of the cutting die and across the face thereof; a knife having a movable connection with the member upon each side of the opening; yielding means exerting pressure against each knife, whereby tomove the same toward and in Contact with each other; and each of said knives having a recess therein, which when the knives are together form an opening of substantially the same size and shape as the rod a wall adjacent to said recess which ilares outwardly and when combined with the wall of the other knife forms an open throat to receive the rod.

9. In mechanism of the character described, wherein a rod is advanced through a cutting die; a member having an opening therein movable transversely of the cutting die and across the face thereof; a knife having a movable connection with the member upon each side of the opening; and yielding means exerting pressure against each knife, whereby to move the same toward and in contact with each other, each of said knives having a recess therein, which when the knives are together form an opening of substantially the same size and shape as the rod. f l

10. In mechanism of the character-described, wherein a rod is advanced through a cutting" die; a member having an opening therein movable transversely of the cutting die and across the face thereof; a knife having a movable connection with vthe member upon each side of the opening; and yielding means exerting pressure against each knife, whereby to move the same toward and in contact with each other.

11. In mechanism of the character described, wherein a rod is advanced through a cutting die; a slotted member movable transversely of the cutting die and across the face thereof; cutting means connected with said member adjacent to one end of the slot, composed of parts independently connected with the member and movable toward and away from each other, the parts of said cutting means moving away from each other and passing over the rod during the return movement of the member if the rod is then projecting beyond the face of the cutting die; and yielding means for returning the parts of the cutting means to their cut-off position.

12. In mechanism of the character described, wherein a rod is advanced through a cutting die a slotted member movable transversely of the cutting die and across the face thereof; and cutting means connected with said member adjacent to one end of the slot, composed of parts independently connected with the member and movable toward and away from each other, the parts of said cutting means moving away from each other and passing over the rod during the return movement of the member if the rod is then projecting beyond the face of the cutting die.

13. In mechanism of the character described; wherein a rod is advanced through a cutting die; a slotted member movable transversely of the cutting die and across the face thereof; and cutting means connected with said member adjacent to one end of the slot, composed of parts independently connected with the member and movable toward and away from each other.

14. In mechanism of the character described, wherein a rod is advanced through a cutting die; a member having a slot, movable transversely of the cutting die and across the face thereof; and relatively moving cutting means connected with said member, the relation of said member and cutting die being such that the rod may be advanced beyond the face of the cutting die and through the said slot between successive cutting off operations and while the cutting means is in an advanced position.

15. In mechanism of the character described, wherein a rod is advanced through a cutting die; a member having an opening therethrough movable transversely of the cutting die and across the face thereof; and a plural part cutting means for severing that portion of the rod projecting beyond the face of the cutting die, the rod during successive cutting off operations passing through the said opening presenting another portion of the rod to be out off before the cutting means has returned to its retracted position.`

16. In mechanism of the character described wherein a rod is advanced through a cutting die; a member movable transversely of the cutting die and across the face thereof; cutting means movably mounted in the member for severing that portion of the rod projecting beyond the face of the cutting die, said member being so formed as to permit the feed of the rod beyond the face of the movement of the -rod beyond the face of the cutting die during the transfer travel of said cut-off portion, `amd the cutting element being vcomposed of plural parts, which during a .portion of l the return travel thereof pass overthe rod if projecting beyond the face of the cutting die. Y

Y DAVIS E. BURBANK, Administrator of Louis 8. Burbank, Deceased.

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