US1909373A - Wire drawing drum - Google Patents

Description

y 1933- E. J. MOILVRIED WIRE DRAWING DRUM Filed March 2, 1931 I apparatus,

, grooves belng formed Patented May 16, 1933 UNITED STATES.

PATENT OFFICE EDWIN J. MCILVRIED, 0F AKRON, OHIO, ASSIGNOR TO THE VAUGHN MACHINER Y COM- PANY, OF CUYAHOGA FALLS, OHIO, A. CORPORATION OF OHIO WIRE DRAWING DRUM Application filed March 2, 1981. Serial No. 519,383.

This invention relates to wire drawing and more particularly to that part of the apparatus which is known as the wire drawing drum or capstan.

In wire drawing machines of the type in which the wire is wrapped around a rotatable drum to draw the same through a die, it has been customary to design these machines so that, in operation, there will be some slippage between the wire and the surface of the drum. Accordingly, during ordinary use of a machine of this kind the surface of the drum is subjected to considerable wear, frequently resulting in which tend to cause breakage of the wire. To restore the surface of the wire drawing drum to a smooth condition forefiicient operation, it has heretofore been necessary to remove the drum from the machine to either apply a new wear strip to the drum surface, or to subject the drum surface to machining operations. The removal of the drum from the machine for the purpose of reconditioning its wire contacting surface requires considerable time and effort and, in addition, renders the machine inoperative and unproductive for a considerable period of time.

It is therefore an object of this invention to provide a novel wire drawing drum having a wire contacting surface which can be renewed or reconditioned without the need of disconnecting orremovingthe drum from the wire drawing machine.

Another object of this invention is to provide a wire drawing drum embodying novel means for retaining or anchoring a renewable wear strip in place on the drum.

A further object of this invention is to provide a wire drawing drum of the type having a renewable wear strip in which novel means is employed for anchoring the ends of said strip. I

Other objects and advantages of the invention will be apparent from the following description, taken in conjunction with the accompanying sheet of drawing, in which Figure 1 is a top plan view of a wire drawing machine embodylng my inventlon;

2 is a sectional view of the wire Fig.

drum taken on line 22 of Fig.

drawing 1; and

Fig. 3 is a partial sectional view taken in the direction indicated by the line 3-3 of Fig. 2.

In the drawing to which detailed reference will presently be made, I have shown the preferred form of my wire drawing drum for purposes of illustration, but it will be understood, of course, that my invention is not to be regarded as being limited in scope to the particular arrangement of structure illustrated and described.

In Fig. l of the drawing, I have re resented one formlof wire drawing mac ine in which my invention may be used, but obviously the principle of my invention may be used to advantage in any wire drawing machine of the type employing a rotatable drum for drawing the wire through a die.

The wire drawing machine shown inFig. 1 is rovided with the usual casing 10f or housing the gearing, or similar mechanism, which actuates the rotatable wire drawing drum or capstan 11. The drum illustrated .in this instance is of the type having a pludrum. A take-up device in the form of a.

spool or reel 14 driven by suitable mechanism, is provided for winding. the strand of wire being delivered from the drawing drum.

My invention has to do with the drawing drum itself, and as will be hereinafter explained in detail, is so constructed that when the wire-contacting surface thereof becomes worn it can be renewed and restoredto an efficient operating condition without the need of removing the drum from the Wire drawing machine or rendering the latter inoperative for any great length of time. Ac-

cording to my invention, this drum com prises a body portion 15 of suitable material, such as cast iron, having a. central opening 16 into which a drive shaft or arbor may extend. In this instance, the drum being of the step or cone type, it is formed with a plurality of cylindrical surfaces or sections 1'? of different diameters, each of which is disposed between two radially extending flanges 18. These flanges are provided for the purpose of preventing the wire from jumping off the respective drum surfaces, and also to retain in. place the renewable bands or wear strips 19 which are clearly shown in the drawing as extending circumferentially of these drum surfaces. These wear strips are preferably made of a material which is harder "than the material of the drum, such as hardened steel, and provide each of the cylindrical sections of the drawing drum with a renewable wear resisting surface.

For securing or anchoring the ends of the wear strips in such a. manner that the strips can be readily removed or applied to the drum without dismounting the latter from the wire drawing machine, I provide recesses 20 into which the inturned hook-like ends 21 of the wear strips extend. These re cesses are formed in the respective cylindrical surfaces 17 between the pairs of radially extending flanges 18. The inturned ends of the wear strips are retained or anchored in the respective recess by filling each of the latter with a body of lead or suitable nonferrous alloy which is indicated by the reference character 22. To assist in retaining the congealed metal bodies in the recesses 20, the side walls 23 of the latter are preferably undercut or oppositely inclined as clearly shown in Fig. 2 of the drawing.

In applying a wear strip 19 to one of the surfaces of the drum, the strip is wrapped around the drum with its ends 21 extending into the recess 20. While they wear strip-is held in this position a. quantity of lead or non-ferrous alloy, in a fused state, is poured into the recess and allowed to congeal to anchor the ends of the wear strip in place, as shown=-in Fig.- 2. When the strip wears and it becomes necessary to replace the same, the body of lead or alloy 22- may be chipped out, but preferably heated, as by means of a blow torch, to fuse the metal and release the inturned ends of the strip. After the worn strip has been removed, it is simply necessary to wrap the new strip around the drum surface and insert the ends 21 into the recess 20 which is then filled with the lead or alloy.

It will be seen from the arrangement of structure which I have illustrated and de-- scribed that I have provided a novel form of wire drawing drum having a surface which can be restored to efficient operating and means for anchoring said wear reoaars condition without need of removing the drum from the machine. It will also be seen that with the novel securing means which I have provided for the ends of the wear strip, it is not necessary to accurately measure or determine the length of wear strip to be fitted to the drum surface be cause the exact location of the ends 21 in the recess is unessential so long as these ends do not engage each other and cause the strip to bulge away from the drum surface. The anchorage of the wear strip which I have provided retains a strip tightly in place on the drum surface in such a way that the driving force of the drum will be efficiently transmitted to the wire to be drawn, and since the metal, in which the ends of the wear strip are embedded, is soft and adapted to be readily fused or chipped, the strip can be quickly and easily removed and replaced. without dismounting the drum.

While I have illustrated and described the device of my invention in a detailed manner, it should be understood, however, that I do not intend to limit myself to the precise details of construction illustrated and described, but regard my invention as including such changes and modifications as do not involve a departure from the spirit of the invention and the scope of the appended claims.

Having thus described my invention, I claim:

1. A wire drawing drum having an annular surface with a recess therein, a wear strip engaging said annular surface and having securing means disposed in said recess, and a body of readily fusible congealed metal in said recess, for' anchoring said securing means.

2. A wire drawing drum having an annular surface provided with a recess, a body of fusible metal in said recess, tending circumferentially of said annular surface and having intiirned ends embedded in said body of fusible metal.

3. The combination with a wire drawing drum having an annular surface with a recess therein, of a renewable wear strip extending circumferentiallybf said surface, and means for anchoring said wear strip to said drum whereby stri placement can beeifecte without requiring demounting of the drum or access to the interior thereof, said anchoring means comprising a body of solidified material disa. wear strip exremoval and reposed in said recess, and securing means eX- drum having an annular surface with a rev cess therein, of a renewable wear strip extending circumferentially of said surface, strip to said' drum comprising a body of fusible metal disposed in said recess and having portions of said strip embedded therein.

5. A wire drawing drum having an annular surface with an undercut recess therehaving securing means embedded in said material.

6. A wire drawing drum having spaced annular shoulders and an annular surface between said shoulders, said annular surface having a recess therein, a body of solidified material in said recess, and a wear strip extending circumferentially of said surface between said shoulders and having securing means embedded in said material.

7. A wire drawing drum having a plurality of annular surfaces of different diameters, each of said surfaces having a recess therein, a body of solidified material in each recess, and a wear strip extending circumferentially of each of said surfaces and having securing means embedded in the solidified material.

8. A wire drawing drum comprising a metal body having an annular surface with a recess therein, a wear strip engaging said annular surface and having securing means extending into said recess, and a body of congealed metal in said recess with said securing means embedded therein, said congealed metal being fusible at a lower temperature than the metal of the first mentioned body.

In testimony whereof, I

my signature.

EDWIN J. MCILVRIED hereunto aflix

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