US1147993A - Bifurcating-machine. - Google Patents

Description

R. L. WILCOX & G. F. BYAM.

BIFURCATING MACHINE.

APPLICATION 111m 1511.19. 1914.

1 1,147,993. Patented July 27,1915. v

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R. L. wlLcox a. G. F. BYAM.

BIFURCATING MACHINE.

APPLlcAloN man FEB.19.1914.

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R. L. WTLCOX & G. F. BYAM.

BIFURCATING MACHINE.

APPLICATION FILED FEB. I9. 1914.

Patented July 27, 1915.

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RICHARD LESTER WILCOX AND GEORGE F. BYAM, 0F VATERIBURY, CONNECTICUT, .ASSIGNORS T0 THE WTERBURY FARREL FCUNDRY AND MACHINE COMPANY, OF WATERBURY, CONNECTICUT, A CORPORATICN 0F CCNNECTICU'I.

BIFURCATING-MACI'IINE.

Application led February 19, 1914.

To all whom it may concern Be it known that we, RICHARD LEsTEu lVrLCoX and GEORGE F. BYAM, citizens of the United States, residing at lVateibury, in the county of New Haven and State of Connecticut, have 'invented certain new and useful Improvements in Bifurcating-llachines, of which ther following is a specilication, reference being had therein to the accompanying drawings.

rThis invention relates to a new and improved bifurcating machine of that type wherein blanks are successively and automatically delivered to holding devices and there held while a slot is cut in the end thereof.

In designing this machine it has been our object; among other things, to cut the slot with a reciprocating as distinguished from a rotary cutter; to provide blank holding means that will have successive, independent movements to facilitate the holding and gripping of the blank; to so arrange the gripping dies that they may have a relative adjustment with the line of movement of the cutter to insure the cutting of the slot in the proper position in the blank; to so mount the gripping dies and their operative mechanism that they will be rigid and unyielding during the cutting operation; to

'operate the cutter at differential speeds, at

different points of its movement, from a source of power located upon the vopposite side of the blank from the cutter at the beginning of the cutting operation; to provide means for adjustments, whereby slots of varying depths, as well as blanks of varying lengths, may be operated upon; and in these, and other ways, to so improve the mechanism of machines of this character, that they may be simple in design` economically constructed, readily assembled, and operate with such efficiency as'to produce work superior to any heretofore made, and at a maximum speed without impairment of the operative parts of the machine itself.

To these,.and other ends, our invention consists in the bifurcating machine, having such details of construction and combinations of parts as will be hereinafter described and more particularly pointed out in the claims. l Referring to the drawings, in which like numerals of reference designate like parts in Specification of Letters Patent.

Patented July 27, 1915.

serial No. 819,736. y

the several figures; Figure 1 is a side view of our improved machine; Fig. 2 is a view of the slide and slide bracket with some of the mechanism adjacent thereto; Fig. 3 is a view of the cutter or broach; Fig. 4 is a fragmentary plan view of the machine; Fig. 5 is av sectional view of the gripping die and slidek taken upon line fir-eB of Fig. 4; Fig. G is an end view of the machine partly in section; Fig. 7 is an enlarged detail view of the guide lingers, one of the gripping dies and some of the mechanism adjacent thereto; Fig. S is a detail'view of the gripping dies, shown in their relative positions when wide open; Fig. 9 is a view of the same parts in an intermediate rest position; Fig. 10 is a sectional view of the cutter or broach taken upon line C-D of Fig. 8, with a bifurcated blank shown by broken lines in connection therewith; and Fig. 11 is a perspective view of the stripper plate.

In the embodiment of our invention in the form illustrated in the drawings, the numeral. 1 designates the bed ofthe machine; having a receiving pan 2 at one end, and within which a gate 4 is slidable beneath the caps 5 and rotatably mounted therein are the shafts 2 and 3. Fixed upon the shaft 3 is a cone driving pulley @and pinions 7, the teeth of which mesh into the teeth of the gears S and 9 upon the shafts 9.. Reciprocatory motion is transmitted to the gate 4 through the gears 8 and 9 and the pitman 10 which is pivotally connected to the pin 11 in said gate and to the pin 12 fixed in and joining the gears 8 and 9.

Adjustable vertically upon the bed 1 by the screw 15 that abuts against a hardened block 1G, is a bracket 13, which is secured in its intermediate positions .by the bolts 14. Movably mounted upon the bracket 13 is a slide 17, that is connected with the gate 4 b v a screw 18 threaded at one end in said slide and passing through an opening 19 in the gate, with a nut 2O upon its opposite end. The relative vertical position of the slide 17 and the gate 4 is varied by manipulation of the nut 20, and the raising and lowering of the slide bracket 13, during which time the screw 18 moves freely through` the opening 19. By reason of this connection the slide 17 may reciprocate in various*horizontal planes while the gate 4 always moves in the same horizontal plane.;

The cutter or broach 21 is constructed with a straight base portion 22, having a flat lower edge, and projecting upwardly from the top thereof is a fin 23 (Fig. l0) that is narrower than the said base, and having an inclined upper edge provided with a plurality of teeth. The width and shape of the lin in cross section is the same as the slot to be cut in the blank. This cutter is secured inthe slide 17 with the bottom edge of the base resting upon the top of the slide, and the back end thereof against a shoulder 24, being held against lateral movement by a cap 25.

The mechanism for holding and gripping the blanks comprises the slides 26, dies 27, die holders 2S, within which the dies are secured by the screws 29, bolts 30, which pass through elongated holes 31 in the die holders 28, and are threaded into the slides 26, adjusting screws 32 threaded into the slides 26 and bearing at their outer ends against the die holders 28, the cam slides 33 having cam grooves 3ltherein and movably mounted in the slots 35 in the slides 26, cam rolls 36 Within the cam slots 34 and rotatably secured to the slides 26 by the pins 37, cams 38 fixed on the shafts 2, connecting rods 39, cam rolls 40 fixed to said connecting rods and projecting into the cam grooves in the cams 3S, a block L.t1 pivotally secured to each of the slides 33, a rod 42 connecting each of said blocks with said connecting rods, check nuts 43 threaded on said rods, and springs 44 between said check nuts and blocks l-l.

During the rotation of the shafts 2 a reciprocatory movement is given the cam slides 33 through the rods 39 and 42, which is transmitted into a reciprocatory movement in the slides 26 through the engagement of the cam rolls 36 with the cam grooves 3st in the said slides 33, this movement causing the gripping dies 27 to move toward and away from each other. VThe timing of the cams and the shape of the cam groove 34E is such that the dies 27 move toward each other in a straight line until the dies occupy substantially the relative position shown in Fig. 9, when there is a limited dwell, after which the dies are again moved in the same direction until their faces abut against each other, as shown in Figs` 4 and 6 of the drawings, at which time the rolls 36 are in a portion of the cam groove 34 that is parallel with the direction of movement of the cam slides. By this latter feature the dies are held rigid by unyielding parts during the cutting operation, and this provides against any possibility of the dies releasing their grip upon the blank, which might occur if said rolls were in contact with a beveled face in said cam groove. ln relation to a predetermined line the position of the dies may be varied by manipulation of the adjusting screws 32 and bolts 30,

this adjustment always insuring the blank being held in its proper relative position with the cutter 21.

Secured to an upright fk5 upon the bed 1,

by one or more bolts 4:6, is a backing block eration oif the slide mechanism and prevents a chattering cut upon the blank. Tf any portion of the blank holding mechanism should become clogged or displaced the springs 4A- will yield and prevent any unnecessary damage or breakage of the parts.

Any type of mechanism may be used to convey blanks to the gripping dies, and we have illustrated a form herein, which, except in a limited number of features, constitutes no part of this invention, being now more or less in general use and well known. lt will therefore only be briefly described. This mechanism consists essentially of a hopper lL8 secured to a standard l-9 that is i'ixed to the upright 45 and into which blanks are indiscriminately thrown. Rotatably mounted adjacent to the hopper is a selector 50, which delivers the blanks into the chute 5l, all arranged in proper order, with the heads in the same direction. This chute conveys the blank to the carrying mechanism, which comprises the head members 52, having an opening 53 therebetween and an inwardly converging, tapered lower end 54., a slide 55 that is movable in a part attached to the standard #19, and to which the head members 52 are connected by means of the spring fingers 56. This slide is moved upwardly by a spring 57, in which position the top of the head members 52 are opposite the lower end of the blank, as illustrated by the position of the blank shown by broken lines in Fig. 7, a position that is determined by the Contact of the stud 5S in said slide with the edge of the opening 59 through the cap 60. The downward position of the slide 55 is variable, being limited by the screw 6l that is in the path of movement of the stud 58.

Reciproeably mounted within a part connected with the standard 49, and parallel with the slide 55, is the plunger 62, the axis of which is coincident with that of the head members 52,4 and having a` pressure punch 63 fixed in the lower end thereof. Motion is imparted to this plunger 62 from a cam groove 6l in the gear 9 through the rock arm 65 pivotally secured to the bed, and having a roll 66 thereon that lies within said cam groove, a rod 67 having connection at one end with a block 68 pivotally secured to the rock arm 65 upon the stud 69, jam nuts 7() threaded upon the end of said rod 67, a collar 7l adjustably secured upon said rod., a coil spring 72 between said collar and the block 68, a rock lever 73 pivotallysecured to a lug 74, upon the bed 1 bythe pintle 75,

' a lever' 7 6 having connection with the rock lever 73 at one end through the link 77, and having a yoke end 78, to which is secured the guide blocks 79 that lie within a grooved collar 80 threadably secured upon the plunger 62 and locked against movement in any of its adjusted positions by the collar S1. The endwise movement of the rod 67 causes the lever 73 to rock upon its pivot mounting and through the link 77 imparts a similar rocking movement to the rock lever 76, and a vertical, reciprocatory movement to the plunger 62. The extreme positions of the rock lever 73 and link 77 are shown by full and broken lines in Fig. 1, the former being the position when the plunger is in its down position and limited by the stop screw yS2. threaded through the lug 7i and in the path of movement of therock lever 73. in this position the pivotal connection between the rock lever 73 and the link 77 is just beyond the dead center, which will prevent any premature upward movement of the plunger G2.

T he blanks as they pass out of the chute lie with their aXes substantially parallel with that of the head members 52 and pressure punch 63, and are moved from said chute into said head members by a slide 83 that is reciprocated through a rock lever 84. This mechanism constitutes no part of our present invention. The slide 83 delivers the blanks in the position above the head members 52 substantially as shown by broken lines in F ig. 7, which then drop into the opening 53, that is slightly larger than the outside diameter of the head, and the shanks 'project through and below the head members 52 with the head resting upon the inclined face upon the inside of the end 54. J ust as the blank drops into this position the dies 27 are moved so that they occupy the position substantially shown in Fig. 9, in which position the blanks can be moved vertically between the dies but not laterally, the dies having no gripping action thereon. The pressure punch 63 now moves downwardly and engages the `head of the blank and forces it through the head members 52, which spring outwardly to permit such action and completes its movement when the underside of the head rests against the top surface of the gripping dies, and is there held against upward movement. rIhe gripping dies now move toward each other to their closed position, at which time they grip the blank ti ghtly therebetween and hold. the same against movement in any direction. 4lf a blank should enter the head members 52 in any other position than the proper one, the spring 72 upon the rod 67 will yield and prevent breakage of the parts. The timing of. the parts is such, that as soon as the blank is grippedbetween the des'the slide 17 bed gins to move toward the blank and the broach 21 cuts the slot in the lowerr end thereof, the full depth of the slot being determined by the angle of inclination of the upper cutting face of the fin 28 upon the broach, as well as the relative position of the slide 17 with the blank, w lich, it will be remembered is adjustable vertically. After the broach has passed entirely through the blank, the plunger' 62 moves upwardly releasing the pressure upon the head of the blank, the gripping dies move outwardly to release the blank and the same drops by gravity into a pocket 85 in the end of the slide and lies therein until. the reverse movement of the slide causes it to be j olted therefrom into the pan arranged to receive it.l or onto an inclined plate 90, which intercepts the fall of the blank and guides it into said pan, if perchance it is not ejected therefrom until the completion of its( outward stroke. rhe teeth of the breach are kept free from chips through wire brushes 86, which are secured to the bed by the caps S7, the inner ends of which brushes. are in the path of movement of the said broach, as will be apparent from F ig. 2 of the drawings.r

lt will be observed that theaxis of the shafts 2, from which shaft the slide 17 is `reciprocatcd, is yin a higher horizontal plane than the pivotal connection between the gate al. and the pitman 10, and that the cutting stroke begins when the pin 12 is in its eX- treme forward position, hence the cutting portion of the stroke of the slide 17 is very much slower than the return movement thereof, which takes place while the `pin is traveling from its extreme rear position to near its extreme :forward position, said forward position being shown in vFigs. 1 and 4.

To insure the clearance of the dies, we have provided a stripper plate 88' that is secured to the block i7, and having lingers 89 thereon that overlie the gripping dies and strip the blanks therefrom during the outward movement thereof, if perchance it does not drop by gravity.

Many minor changes and alterations may be made within our invention, aside from those herein suggested, and we would therefore have it understood that we do not limit ourselves to the exact construction herein shown and described, but claim all that falls fairly within the spirit and scope of our invention as set forth in the appended claims.

4Having described our invention, what we claim as new, and desire to secure by Letters Patent, is

1. In a machine of the character described, the combination with reciprocating gripping dies; of a reciprocating broach for cutting a slot in the blankwhile in said gripping dies; means for actuating said dies, whereby they move into a holding` position and then a gripping position; means'l for delivering blanks to said dies; a plunger movable toward and away from said gripping dies in a path at substantially a right angle there' to; means for actuating said plunger by toggle mechanism so arranged that when said pressure plunger is in contact with the head of said blank while in said gripping dies and said broach is in contact with said blank, the pivotal connections in said toggle mechanism will be on substantially a dead center.

2. In a machine of the character described, the combination with blank holding means; of a broach; a bracket; means for adjusting the relative position of said bracket upon a iixed part of the machine toward and away from said blank holding means; a member for vcarrying said broach mounted in said bracket; means for imparting a reciprocatory movement to said member within said bracket; and means for securing said bracket in any of its adjusted positions.

3. In a machine of the character described, the combination with blank holding means; of a broach; means for imparting a reciprocatory motion to said broach, said means comprising a rotary member; a reciprocatory member constantly movable in the same plane; a second reciprocatory member; an operative connection therebetween; a bracket mounted upon a fixed part; means for moving said second reciprocatory member within said bracket so that it may operate in various planes; and means for securing said broach to the second reciprocatory member.

4. In a machine of the character described, the combination with blank holding means comprising members that hold the blank therebetween; of a broach; a member for carrying said broach; a bracket within which said member is operatively mounted; means .for moving saidbracket toward and away from said blank holding means and securing the same to a fixed part; a rotary member; a gate; an operative connection between said broach carrying member and said gate, said connection permitting said broach carrying` member to move in various planes within said bracket while the said gate operates in the same plane.

5. In a. machine of the character described, the combination with blank holding means; of a broach; a member for carrying said broach; and means Jior imparting areciprocatory movement to said member from a rotary member and causing said broach to engage and pass through said blank when the same is in said holding means, said rotary member having its axis in a different plane than said broach carrying member whereby said broach is caused to move at lessspeed while in engagement with said blank than when moving in the opposite direction.

6. In a machine of the character described, the combination with a blank supporting mechanism; of gripping dies; means for deliveringrblanks theretofrom said blank supporting mechanism; an independently actuated slide for each of said dies; and means for operatively connecting said dies and slide whereby the movement of each of said slides will synchronously move the dies toward each other and dwell without gripping the blank and subsequently again move them toward each other and grip the blank.

7. In a machine of the character described, the combination with a plurality ot' gripping dies; of a slide Jfor each of said dies; a die holder for each of said dies, means for securing said die holders to said slides; means for adjusting the position of the die holders upon the slide; means for securing said die holders in any of their adjusted positions; a cam slide for each of said slides having an operative connection therewith; and means for separately operating each oi said cam slides whereby said dies will have successive independent movements toward each other and in the last of such movements said slides will occupy such relation to the cam slide as will prevent the accidental or premature movement of the gripping dies.

8. In a machine of the character described, the combination with gripping dies; means for actuating the same, whereby said dies move into a holding position and then into a gripping position; means for delivering blanks to said dies; a broach for cutting a slot in the blank while in said gripping dies; a plunger movable in a path at substantially a right angle to the movement of the gripping dies toward and away from said gripping dies; means for actuating said plunger by toggle mechanism, so arranged that when said plunger is in the position nearest to said gripping dies the pivotal connections of said toggle mechanism will be on substantially a dead center.

9. In a machine of the character described, the combination with blank holding means; of a broach; a bracket; means for adjusting the relative position o t' said bracket upon a fixed part toward and away from said blank holding means; a member for carrying said broach mounted in said bracket; and means for imparting a reciprocatory movement to said member within said bracket.

l0. In a machine of the character described, the combination with blank holding means; of a broach; a member for carrying said broach movable in a path at substantially right angle to said blank holding means; means for securing said broach therein; means for adjusting the relative position of said member toward and away from said blank holding means; a rotary i ab member; a gate; a Connection between said rotary member and gate whereby a reciprocatory movement is imparted to the latter; and an adjustable connection between said gate and said broach carrying member through which the motion of said gate is transmitted to said carrying member.

In testimony whereof we aiiix our signatures in presence of two witnesses.

RICHARD LESTER WILCOX. GEORGE F. BYAM. Vitnesses:

CLIFFORD PETITJEAN, HOWARD CoLEY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, I). C.

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