US1204970A - Metal-shaping tool. - Google Patents

Description

OM92 w H.R.eus0N.- METAL SHAPING TOOL. v

APQ'LICATION FILED MAY 22. 1914. 1,204,970. I Patented Nov. 14,1916

2 SH EETSSHEET r.

WITNESSES 1 INVENTO'R v H. R. GILSON.

v may; SHAPING TOOL.

APPLIQATIUN EILEDYMAY 2'2. 1914.

Patented Nov. 14, 1916.

2 SHEETS-SHEET 2.

INVENTOR 0 WITH ESSES To all whom "it may concern:

.1-: pistes PA ENT OFFICE.

m :a. crimson, or nsnnn, rnimsrnvanm, .essienon T narrower. METAL xonnmo company, on rrrrrs'snnen, PENNSYLVANIA, A conronamon on PENNSYLVfiI-IIA.

Be it known that I, HENRY R. GILSON, res ding at Baden, in the county of Beaver and State of Pennsylvania, a citizen of the United States, have invented or discoveredcertain new and useful Improvements in "Metal-Shaping. Tools, of which improve merits the following is a specification.

-My ,invention relates to improvements in machinery for shaping material in the form v of a reversely curved stripv into a helically wound tube of flexible armor fonelectrimial conductors, etc; it consists essentially of a forniingrtoolof novel shape and function 15' and of the organization of this formingtool with, other machine parts. V

Figure 1 of the accompanying drawings shows the assembled machine in vertical longitudinal section; Fig. 2 shows the machine in end elevation, from the right, Fig. 1; Fig. 3 showsthe forming-tool in which my invention centers, inside elevation; Fig.-

4 is a front elevation of thesaine tool; Fig. 5 is a view in side elevation of the mandrel of the machine with the forming-tool sectionally shown in operative relative position to the mandrel-the relative positions,

in other words, which. the two parts suetain whenorganized in the machine. Fig. 6 is a view on much larger scale and. in longn tudinal section through the walljof a'tube' ilormed of a specially shaped str p, coiled. in a' machine of my invention. Fig. 7 1s a viewin transverse section of the mandrel shown in Fig. 5.

Referring first to Figsfi and l, 1 is the forming-tool; it consistsessentially of a .body in which an internalpassageway is formed. This passageway is essentially helical; it is formed by and between the cylindrical surface), and the helical surface 3,- and is open at .oneside. In other words, it is a groove whose bottom is cylindrical, whose side-wall on one side is helical and which is open on the other side. The tool is, for assembling with the other parts, provided with an opening 4, concentric with the passageway to side; and it is also, for like reasons. provided with an extended flange Thus,

'viewed as a whole, the tool is of ageneral annular shape: or, considering that when as- Specification of Lttersiatent.

already described, "and extending throughthe tool" from side 50,

' nnransnarme TOOL.

Patented Nov. 14-, 1916.

Application filed-May 22, 1914.' Serial No. 840,368.

although; as will hereinafter appear, and as may be observed by referring, to Fig. 5,

it is unattached to such mandrel. The helii cal passageway alreadydefined then is ineffect a groove formed on the inner face of this annulus or collar; the bottom of this groove is a cylindrical surface, it is closed on one side by thehelical wall 3, and is open'on the other side. It remains to he said that access is had to this groove at its =1nner end by an opening 6 formed through the wall of the annulus, and this opening,

' as is best shown in Fig. 4, is preferably formed tangent to the circular contour of the passageway (when vicwedin plan). As the drawings show, the passageway extends through something less than one complete turn or loop of the helix to which it is shapedless by the width of theopening 6;

and opening 6 is extended into a slot open at the end. Thus it appears that the forming-tool engages the strip of material on one side and along one edge and exerts its shaping stress upon those parts. The opposite side of the material is untouched by the formingtool (though it. engages other parts, as will presently appear) and the opposite edge of the strip is, so far as the forming-tool is concerned, free and unconfined-except as engagement with the strip at other points controls the position of the whole. c

Referring now to Fig. 1, the forming-tool may be seen in its operative position, with material being drawn to it. A comparison of the showing of this figure with the enlarged view'of the tool itself will make plain 1 f the fact that a strip of material A suppliedfrom a suitable source through opening 6 (the tangential opening being preferably alined with. the source from which the strip v is fed) to the helical passageway already described, and extending beyond the passage-. way and being anchored at its forward end against rotation in unison with the forming i die, rotation of the die (andvof the still nn' r formed portion of the strip, in unisonv with the die) will effect a shaping. of the strip lasing drawn through it and produ th ing to the left fromthe open end oihthe.tool.-

coiled article shown in Fig. 1 at B51. advanc In starting the machine, the advance end-golf the strip may be held by ,a pair of pliers; It'should he remarked of the operation that the helical passageway is so shaped as to BEST AVAILABLE COP\ give a set to a straight strip fed to the machine. The helical wall of the passage way' 'forces the tubin forward along the mandrel as it is being i ormed and the cylindrical wallof the same passageway holds the edge of the strip in cdntact or in substantial contact with the .mandrel and confines one edge of the strip while the otherj edge (onaccount of the helical shaping) is being slightly stretched. That 15 to say,

. there is a stress of distortion exerted on the advancing strip, so that if it were uncoiled it would no longer be straight but curved edgewise. When dealing with the soft metal ordinarily employed in making this flexible pipe, such ashaping of the material is not difiicult, and' it will readily be understood that such shaping has itsadvantages in af fording a better and more coherent product. Not only is the advance portion of the tube in course of shaping anchored against rotation; means are preferably provided also for exerting upon it a longitudinal pull or tension; for, while the effect of the rotating die is to cause the turns of metal to crowd outward from the open end of the die, best results are obtained by spreading the successhown in detail in Fig. 5. It consists essentially of a, long substantially .cylindri'al though preferably slightly ta bring body 7; and since the rotation of this ody is part "of the operation of the machine, the end of the mandrel is .formed as a screw-threaded block 8, by which it may be secured to proper supporting and rotating means. (A slight taperingof the mandrel in the direc tion of advance of the coiled strip facilitates such advance.) This block 8 appears in Fig. 1 and itwillbe understood that the long mandrel body.;,extends to the left within the tube B to or approximately to the sizing mechanism presently to be described. The degree of the extent of the mandrel however is not a detail, essential to ,the invention. when the parts are. assembled, the forminghead 1 surroundsthe mandrel; the space between the" two parts-is sufiicie'iit to allow the easy advance ofthe tube in right-line path over the mandrel rotating within it. As the operation of v the machine progresses, the tube as it is'yformed'passes out z t-the open end ofthejforming die and. advances along.

the body imlnclrel, The mandrel,- .as

- the mandrel.

ha: been said, rotates, and it rotates a direction opposite to that of the formingdie. Its surface is roughened, as for example by the longitudinal fluting shown in Figs. 5 and 7 While the relative sizes are such that the tube B slipseasily oier the mandrel, the clearance-is so slight that this rotating mandrel touching the inner sur-' face of the tuba-resists its rotation, and being provided with a series of longitudinal corrugations whose edges gripping the inner surface of the tube retards the tendency of the tube to rotate. The sizing mechanism, which as I have alreadysaid tends also to hold the finished portion of the tube from rotation, has the further function of crushing-spots where the tube may perhaps be oversized and of bringing it to uniformity. It takes the form preferably of a pair of shaped rolls, 9 and 10, so arranged that the passbetween them is alined with andpreferably immediately adjacent the outer end of These rolls then receive be tween them immediately from the mandrel the newly coiled tube and while squeezing it, so far as need be, tostandard diameter, serve also to hold the tube from turning in response to strain from the rotating head 1.

The roll 10 serves at the same time as a bending roll, over the face of which, on the farther side of the roll-pass, the tube is caused to progress while under longitudinal tension. circular path upon roll 10 is t'urther'consolidated and set, against the tendency to un;

wind. a

It remains to describe the organization of the machine, to eli'cct the correlated motions already described. Two oppositely placed standards, 11 and 1'2, are provided with bearing-blocks which are fli'nd canton center. The b ring-block 6a ,stz'indaid 11 supports a sha 13, which is sfltionary. In the bearing-block'on Standard 12 is rotatably mounted the guide-b34314, which carries theshaping-died. This guide-head 14 also surrounds, (for nn-Pose; of rigidity) the stationary shaft 13. On the surface of shaft 13. adjacent theguide-head is mounted the spool 15. which is the source from which 1 the strip is drawn which itis the purpose of the machine to fabricate. This spool 15 is mounted is In idleratina shaft 13 and s0 is free to be driven by the'turning of the guidehead andunwind at the same time as fast as the strip is formed into a tube. Feedrolls 1'6 an'dlT, and a runway 18 for the strip are also mirriedby the guide-head.

Rotatably mounted within the stationary shaft 13 is a rotatable shaft '19, to the end of which is screwed the mandrel by means of the hlock 8 apm the and of it. Shaft 19 pro cc ts rearufardly beyohd tht hollow shaftin which it turns, and it is held from longitudinal displacement by a retainer20, car- The tube thus, stretched in a.

lied on the standard and entering a grooved collar made integral with the shaft. By loosening retainer 20 the shaft 13 and all that it contains ma be drawn endwise through the bearing lock in standard 11,

and thus the drum 15 may be removed and replaced.

The guide-head 14 and the-shaft 19 (the one carrying the shaping die, the other the mandrel) may conveniently be rotatedin opposite directions and at. desired relative speeds from a common power-shaft 21, the one by the sprocketdrive the other by the sprocket-drive 23 and the gear-wheel drive 24.

The sizing rolls 9 and 10 may be geared together, as shown, and driven from the shaft 21 also by the worm 25 and such inter connected gearing as that shown. The roll :26, cooperates with roll 10 to shape the tube as it passes from between rolls 9 and 10 and subject it to the bending, pulling and setting.

action already referred to. I

4 The shape of the strip in cross-section for the coiling of which this machine is well designed is indicated in Fig. 6, where two interlocking turnsof material are shown in section. 'In the shaping operation it is the.

portion of the strip which forms the wall of smaller diameter that the shaping-die immediately engages. It will be observed in this figure that a packing C, which may be a strand of rolled paper, is interposed in the overlap of adjacent turns. Referring to Fig. 2, a reel '27 is shown carried by the rotating guide-head; this reel carries a supply of paper filler which is fed into place as the strip enters the shaping-die, as indicated 5.. Fig. 1.

I claim as my invention:

I In a machine for forming flexible interlocking metallic armor from a single re- I versely curved strip of metal, the combinaformed, whereby saidcollar engages and elongates the rear edge of said strip to bring it to armor-forming shape.

In testimony whereof I have hereunto set my hand.

HENRY R. GILSON.

. Witnesses:

BAYARD H. CnRisrY, Fimxcis J. TOMASSON.

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