US2630910A - Material shedder for drawbench tongs - Google Patents

Description

March 10, 1953 R, R. TURNER MATERIAL SHEDDER FOR DRAWBENCH ToNGs 2 SHEETS-SHEET 1 Filed June l5. 1948 INVENToR. Y iaa l?. @1f/er Mmh 1o, 1953 R. R. TURN-ER MATERIAL SHEDDER FOR DRAWBENCH TONGS 2 SHEETS- SHEET 2 Filed June 15. 1948 .f. AUMFUNU BYMu/nw ATTORNEYS.

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Patented Mar. 10, 1953 tionof Rhode Island AApplica'tion'll une 15;)1948jfSerial No. 33,121

l Claims.

"'Thisinventionrelates to Ia draw lbenchiarld more 'particularly Ito the fdischargemf the work from'the draw Ybench'.

'When drawingftubirrgfwiref ory rod, :a 'xcertain :amount of elasticity' or 4ension'si's: set .up Ainthe imateria'lbein'g drawn" whichfexpendstitselfwhen fthe .material leaves tl'iedie, causing. the. tube; Wire, for-rod to vsnapt forwardlandstrike' the-.draw .car- Vivriage or itongs. 'The sudden :shock oizabruptly stopping` '.thezmaterial `being' vvdrawn :causes it .to 'ikink ior bend or twistroutfofl shape. :The amount oirspring tensionset upE in thefwork'is in direct Vproportion toa multipieoi the reduction ofthe cross secti-onzarea land the length. The problem `of kinked, bent-or twisted'material becomes more acute with double an'dtriple. drawing as the grip- --per carriage .is heavierand willfnot frun .away when itreceives :the .shock 'of theeXpending-mafterial .being-fdrawn,-which inturn causes-it v'to kink more than with ka single draw.

Shocltv absorbers have 4been utilized .on the-gripper carriage or tongs `withlittlelavaiL-as they cannot absorb all of the shock whichis present .at theltime-of .releaseof the worlrlfrom .tried-ie- V.One of :the objects of this .invention vis yto fprovide a method which willA allowthe material being .drawn toextract itselfirom the tongs or carragevand expend. its .pent-up. energy in .-a race- Way valonglthesideof the draw bench or on a `table, .shouldit be applied .to the overhung type ofv drawbench.

Anothery object .of this invention is toprovide a delector carried by. the carriageor tongs which will directthematerial into .the racewayin such amanner that it willprevent kinking or bending of the material when it springsforward out of the gripper or'. tongs.

Another .object .of this inventionisto disp-ense .with or -toreducethe number of unloading'arnis whichhave heretofore been 'required and which present a substantial fmaintenance'iactor.

1...nother objectief 'the invention. isV toeliminate Lall ,of thescrap Yand ydisadvantages..in.redrawillg, -.stacking the work, and other.hazards`.which vcome Afrom crooked material.

Withtheseand other objectsin view,the yinvention consists of certainnovelffeaturesofcoustruction, as will bemoreffully ,described .and particularly pointed out in the appended claims.

`vIn the-accompanyingdrawings:

Figure 1 is anelevation showing a draw bench with a carriage equipped with'the deector for downwardly! discharging the work;

Figure 2 is a sectional viewfof'affragmental portion showing the discharge deector;

Figure"3 is a perspective view of the discharge deflector;

Figure 7 is an elevation of a modified form of (CL-z 205-3) `the 'drawnmateria-l;

` Figure 9 isa sectionloo'king downen topofthe carriage of'Fi'gure'l and Figure 10 isV a perspective' View: of thexdeector `shown in Figure '7.

In proceeding with this inventiomrlprovide"a long raceway generally paralleLbut at onesidezof Ithe path of work which extends beyond the en'dfof the point of draw of thematerial'beingdrawn'a distance vusually/.about the length v`ofthefma- Vterial being drawnisothat .the'te'nsion fin Kthe material may expend 'itself 'byt forcing the "material the required distance'toiiissipate athetension therein, and I "then provide V'upon vthe 'carriage or tongs a deflector orchute forf'directin'g the material into -this raceway By this farrangement the material 'does not come upagainst any abrupt obstruction and cause -aibendingor 'twisting of the end portion'of thematerial. ''Ihe deector usuallyconsists offwalls whichiaregenerally at an angle 'o'iiorty-"ve 'degrees Ato the length of the machine for directing" the end-'of lthe material tothe racewa'y along which it will expend its force. "Suitable guides are provided for controlling'the material as "itexpends'its energy in moving itselfi along the 'raceway With referenceto' the drawings, 1 i0 -`designates generally the usual draw-bench having'a carriage l l thereon along one side of the dra-w` bench,\and extending a substantial i'distance beyond the "draw bench and substantially vof the same lengthas the draw bench, there 'is'v 'a racewaiyY designated ggenerally l2. This raceway may be atrough'aiong one side of -the carriageor it-may vbe a'tabl'e' o1* any other suitableform.

"Provided upon the =carriage'therr-g will be "a devbut which may ktakefvarious forms depending upon the type offjaws which are used inf the carriage for gripping the =material. Thus, l"`I "may provide the typewh-icl'i is utilizediforthe 'jection of the materialifromfthe bottomo'f thejawspas'l have' shown: in'fFigures 1 'i3-m5, or the vclnitef-mal7 'be of a more complex construction-such'asshown at le in Figure '6,-'where the'jaws areofthel'side ejection type, Vor as' shown at iifinFigure 1`0-where the jaws are of 'thetopejection type.

In 'the showing in'fFi'gures 1 to 5v the i gripper head IS is mounteduponthe carriage-'fl I -which is drivenbyw'aimotor 1l/.8 engaging'ithef-:raoks i1 'on either side of tne"carriage. rThe headfiis of thev bottom dischargetype and :comprises f in this instance van*.Farrahgement'ifor gripping three workpieces `at"'one.'ltinie. The .gripping-.arrange- 4ment isidentical ineeachiof-the threeandac'om- :prises-a iixed jaw-:20 and a movableijaw 2r 'nich isrskeyed tot a'zshaft 22, rxivhicl'i;y yshaft has fa gear at its upper end which is operated by a rack 24 having a plunger rod 25 to engage the support 26 for the die 21 through which one end of the work 28 projects to be gripped by the jaws 2B and 2I. The movement of the rack will rotate the movable jaw 2| into engagement with the work 28 so as to swing this jaw into gripping engagement therewith, after which, the movement of the carriage to the right, as shown in Figure 1, will tend to force the movable jaw 2i further into engagement with the work and hold the same firmly between the jaws. After the work is drawn through the die 21, the spring of the work forwardly will swing the jaw 2I clockwise, as shown in Figure 4, to release it from engagement with the work, whereupon the work will jump longitudinally forwardly as it is released from the gripper head.

In order to guide this work out of the carriage and allow it to expend its energy, I provide the deflector or chute which is designated generally I3 and shown in perspective in Figure 3 which comprises essentially a bale plate 30 of a width to be comparable to the gripper head and the work accommodated. By means of extensions 3 I, this plate is positioned into the path of movement of the work 28 as it jumps forwardly upon release of the gripper jaws. This plate is mounted upon the gripper head by means of ears 32 which are deflected from the plate and provided with openings 33 to receive screws 34 for holding it in position on the Support 35 of; the gripper head. Suitable flanges 36 are formed on the edges of the plate so as to prevent any lateral movement. This plate serves to deflect the stock downwardly, as shown in dot and dash lines at 28' in Figure 1 and Figure 2, so that the work will engage the inclined directing portion 31 (Figure 5) of the raceway to be further directed into the portion 38 thereof which has a retaining rail 39 flanged inwardly as at 40. and 40 forms the raceway I2 which extends a substantial length beyond the end of the point of release of the work from the carriage so that the work will shoot down this raceway to expend its energy without coming against any restraining abutment which would tend to bend or twist the ends of the work.

In some cases instead of the gripper head being of the bottom discharge type, the gripper head may be one of the side discharge types in which instead of using the chute or deector I3 of Figure 3, a deector chute I4, as shown in Figure 6, would be used in which there is a bale plate 4I with its extending portion 42 and mounting ears 43 having openings 44 for securing it in position. In this case the work will be guided along the plate 4l to direct the same sideways of the machine and along the horizontal surface 45 and beneath the surface 46 until it reaches a location clear of the draw bench where the plate 45 is flanged downwardly by reason of the vertical wall 41 which with the vertical wall 48 extending from wall 45 serves to direct the work downwardly, the combining effect of these walls .being to direct the work from the side discharge jaws outwardly and then downwardly onto the raceway I2 to allow the same to expend its energy.

In the showings in Figures 7 through 10 a draw bench I of the type having a chain 59 is illustrated in which the carriage II has a hook I to engage this chain for movement along the draw bench. In this case the gripper head is similar to the gripper head described in connection with Figures 1 to 5 and is designated 52 which has a single acting jaw constructed sub- 'Ihis formation 31, 36, 39,

stantially as the gripper described in connection with Figures 1 to 5. This gripper, however, is of the upward discharge type and, accordingly, a diierently constructed chute or deector is provided. The gripper, in this case, has a fixed jaw 53 with a movable jaw 54 mounted upon a rotating shaft 55 which carries a gear 56 to engage the rack 51 and be operated by the plunger 58 which engages the support 26 for the die 21, the work 28 being moved between the jaws 53 and 54 to be gripped and forced further into engagement by reason of the pull on the chain 59 with which the hook 5I engages. As the work is finally pulled through the die 21, it will jump forwardly and releases itself from the jaws, whereupon the chute I5 (Figure l0) which is fastened to the gripper head by reason of ears 6I having openings 62, will engage the portion 60 of the chute or deector to direct the work upwardly, thence along the horizontal portion 66 and against the inclined guide 64 beneath the horizontal portion 55 to cause the work to be moved laterally of the draw bench until it comes opposite the opening 6B formed by a downwardly extending portion 61 from the plate 63 and the downwardly extending portion 68 from the portion 65, thus causing the work to be discharged onto the bottom wall 69 of the raceway and directed along the raceway designated I2, as shown in Figure 8.

From the above, it will appear that I have provided a raceway into which the work is discharged by means of a chute so that the work may expendA such energy as it has without coming abruptly against any portion which might tend to bend it or distort its end.

I claim:

1. In a draw bench, a die, a draw carriage including tongs for drawing the work through the die, said tongs having jaws opening to permit partial endwise passage of the work tube and lateral movement thereof out of the jaws, a way extending generally lengthwise of the bench located laterally of and in close proximity to the path of the work being drawn and extending beyond the end position of the tongs at the completion of the draw, and a deflector carried by the tongs having a surface located beyond the forward end of the work and in axial alignment therewith and at such an angle thereto as to engage the end of the work as it is moved through the jaws under kinetic energy at the completion of the draw to direct the work out of the tongs and guide it into the way for movement therealong to expend its kinetic energy.

2. In a draw bench as in claim 1 wherein the deiiector comprises one wall at an angle to the longitudinal extent of the bench to direct the work laterally thereof out of the tongs and a second wall at a diiierent angle to the longitudinal extent of the bench and so positioned as to direct the Work into the raceway.

RALPH R. TURNER.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Moller ..-i Oct. 9, 1934

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