US1954961A

US1954961A - Wire drawing die

Info

Publication number: US1954961A
Application number: US655043A
Authority: US
Inventors: Perry G Sutherland
Original assignee: KEYSTONE STEEL AND WIRE CO
Current assignee: KEYSTONE STEEL AND WIRE CO
Priority date: 1933-02-03
Filing date: 1933-02-03
Publication date: 1934-04-17
Anticipated expiration: 1951-04-17

Description

April 17, 1934. P. asuHERLAND y 1,954,961

' WIRE DRAWING DIE Filed Feb. 5, 1953 Patented Apr. 17, 1934 UNITED STATES PATENT OFFICE' WIRE DRAWING DIE Perry G. Sutherland, Peoria, 111., assignor to Keystone Steel & Wire Company, Peoria, Ill., a

corporation of Illinois This invention has reference to wire drawing dies and it has for. its principal object to improve lthe construction of the die holder to permit quick and easyl` placement and removal of a die and further, to provide for water cooling of the die and in a manner to produce a positively leak proof holder.

The invention is particularly useful and effective for the cooling of Tantalum carbide, Tungsten carbide or any other wire drawing die made from any other alloy or hard substance.

I am aware that it is not broadly new to Water cool wire drawing dies and that such cooling is more or less generally known;' however, the practice of water cooling dies has not been universally adopted in drawing mills because in most, if not all instances, the constructions employed have not been leak proof, and this is most essential if water cooling of dies is to become general practice; furthermore, such constructions have not been compact, too much time has been required to place and remove the dies, the free flow of vWater around the die has not been effective and lastly the cost has been too great, and is an important item which must be considered. All of these and other disadvantages are obviated in the use of my invention and a device produced embodying advantages heretofore lacking in water cooled dies, especially in the matter of the invention embodying the distinct advantage of being positively leak proof.

That the invention may be more fully understood, reference is had to the accompanying drawing forming part of this description, illustrating a preferred embodiment of the invention, in which:

Fig. 1 is a face view of the device looking at the die placement and removal sides thereof, parts being broken away to show certain interior construction; Fig. 2 is a longitudinal section, in plan, as the same would appear if taken on the line 2-2 Fig. 1;

Fig. 3 is a transverse section, in elevation, as the same would appear if taken on the line 3-3 Fig. 1, and

Fig. iV is a view somewhat similar to Fig. 2, Vexcept that it shows a modified construction of th-e holder.

Like characters of reference denote corresponding parts throughout the figures.

.The holder proper comprises a metal plate or block -l-of suitable length, depth and thickness which, in a preferred form (Fig. 2) is provloed' on Aits rear face with an off-set backing corresponding to the 'depth of the seat 3 and of a plate 2 of suitable thickness, formed integral with the plate or block 1. In a mo'died form (Fig 4) the backing plate 2a is a separate plate welded or otherwise suitably secured to the plate or block 1. Said plate or block 1 is provided with a preferably circular-seat 3 of a diameter slightly greater than the housing 4 which receives the die member 5 and said seat 3 opens out of the front face of the plate or block 1, see Figs. 2 and 4, and in the former instance has its rear wall flush with an imaginary line between the rear face `of the plate or block 1 and the front face of the back plate 2, and in the latter instance said seat opens out of -both the front and rear faces of the plate or block 1 to have its rear opening covered or closed by the plate 2a. Formed circularly in the plate or block 1 and circumscribing the seat 3, but of a width lss than the depth of said seat in the plate or block 1, is an annular recess 6 adapted to serve as a conduit for the circulation ,or movement of water into and out of the plate or block 1 and around the housing 4 for the die.

7 designates a thin'sleeve or ring made of copper or brass or other metal useful as a conductor of heat or for the rapid radiation of heat resulting from the generation of heat arising from the reduction of a wire as itis drawn through 'the drawing die 4. This ring orsleeve is of a length diameter to t snugly against the wall of the seat 3 and may be firmly and securely held within the seat l3 by preferably b'rating or welding. When this sleeve or ringy is secured inl position, it forms the inner wall or. closure for the recess 6v which would normally open into the seat 3 and seals the recess against water circulating therein and therethrough from leakage into the seat and out of the plate' or block 1. The inner surface of the ring or sleeve forms a snug t and bearing for the housing 4 which in turn receives the die 5. It will become apparent from the foregoing description that the ring or sleeve 7 is concentric with its seat 3 Vand that likewise the housing 4 for the die is concentric with the ring or sleeve. The housing 4 hasa snug slip t connection Within the ring or sleeve and to permit ready placement and removal it protrudes slightly from the front face of the holder, when in place, whereby it may be gripped by a suitable tool and in addition this protrusion provides a bearing face against which bears ya cover plate 8 which is securely but removably held by screws 9 passing l through' the cover plate and threaded into the holder. When the plate 8 is secured firmly against the housing 4, said housing is xedly held between the plate 8 and the

plate

2 or 2%, as the case may be. It should be apparent therefore, that on removal of the plate 8 that the housing 4 and with it the die 5 may be quickly and easily removed and a new die inserted. The entire structure, as it is shown, is conducive to economy in cost of manufacture and being compact and simple in assembly a die may be placed or removed quickly and with little eiort.

'The recess 6, which becomes the water-conducting conduit or channel, when sealed by the fitting in of the ring or sleeve 3, as shown, is separated so as to provide an inlet into said conduit and an outlet therefrom and this separation is made possible by a metal dam 10 of copper or other suitable material which is brazed or welded in the wall of the plate or block 1. In communication with such conduit at its inlet side is an opening 11, which, as'shown in Fig. 1, opens into the conduit at one end and out of the plate or block 1 at its opposite end, to which may be coupled a feeder 12 leading to a source of water supply, and in connection with such conduit at its outlet side is an opening 13, which, as shown in Fig. l, opens into the conduit at one end and out of the plate or block 1 at its opposite end, to which may be coupled a take off 14 for the waterv as it flows from the holder after passing around the ring or sleeve 3 and the housing 4 foi` the die.

ing operation, radiates through the ring or sleeve 3 and the constant circulation of .cooling -Water passing around such ring or sleeve 3 takes oi such heat and prevents excessive heating of tle die and the wire as it is drawn.

The cover plate 8 and each of the backing plates 2 and 2a are provided with

openings

15 and 16, respectively, which when the housing 4 with a die 5 are in assembled position, are in axial alignment for the passage of the wire as it is drawn through the die.

The assembly, as shown, provides a simple and eective device and one which in practice has demonstrated that it is positivelyleak proof.

An advantage in the making of the backing plate 2a separate from the holder is, that it facilitates the convenient and easy brazing or welding of the ring or sleeve 3 at its opposite ends to the body of theholder.

/ Iam aware that in attempts to produce a leak/ proof water cooled die, elements of the holder have had a threaded assembly but such a structure has not proven effective to prevent leakage.

Furthermore, I am aware that in such assemblies tapered tting of the elements have been used, but such fittings have not been successful, mainly due to the fact that too much precision is required and there has been an excessive labor cost, making the device too costly and then with little or no assurance that they would be leak proof.

In Amy construction there is a distinct advantage in making the ring or sleeve concentric With the seat in the holder and with the housing for the die,l as it provides for an easy and quick assembly and an easy and quick placementand removal of the housing and die. Furthermore, by brazing or welding of the ring or sleeve to the holder, I absolutely and positively prevent leakage. It is not uncommon in the use of water cooled dies for the flow of water to stop and then instantly heating up of the die and the wire becomes a problem. In my own case soldering of the ring or sleeve to the holder would be ineifectual for the reason that the solder would soon melt and on the recirculation of the water leakage would occur. The improvement, therefore, in myinvention is based on the concentric arrangement of the ring or sleeve to the recess in the holder and the die housing fitting the same and the brazing or welding of the ring or sleeve to the holder.

What I claim is:-

1. A water cooled die including a holder composed of a support having a circular seat of uniform diameter throughout and a circular recess circumscribing and merging into thev seat and providing a water circulating conduit therearound, said circular recess terminating in spaced relation to the side faces of the support, a ring of heat conducting nmaterial concentric with and engaged in said seat and brazed to the wall of the support to provide a seal to prevent leakage of Water from the conduit, said ring being of uniform 'diameter throughout both interiorly and -exteriorly thereof, and the inner end of the ring being impinged against the adjacent end wall of the support that defines the seat, a dam across the recess to provide for the ingress and egress 115 of water into and from said conduit, means to conduct Water from a source of supply through the holder to the inlet of the conduit on one side of the dam, means to conduct water through the holder from the outlet of the conduit on the 120 opposite side of the dam, and a cover plate secured exteriorly of and over a sidel face of the support and extending over the outer end of the ring whereby the ring is completely housed by the support and cover plate.

2. A water cooled die in accordance with claim 1, wherein the support has a separate plate sef cured thereto on the side face of the support opposite to the side face to which' the cover plate is secured which plate denes the inner end of the seat for the ring and against which the inner end of the ring impinges.

PERRY G. SUTHERLAND.