US2336771A - Die holder - Google Patents

Description

ec. M, 1943. P. A. BEAMAN DIE HOLDER Filed June 12, 1942 Jwucnioz PHI/vans A. BEAMAN Patented Dec. id, 1943 DEE HOLDER Application June 12, 1942, Serial No. 446,796

8 Claims.

This invention relates to die holders, and more particularly to an improved device for holding wire-drawing dies and arranged for the circulation of cooling fluid therethrough.

Considerable heat is generated when wire is drawn through a die at high speed, and the desirability of cooling the die under certain conditions has been recognized. In certain die holders heretofore utilized, water is circulated in direct contact with tr e outer surface of the die. n such constructions great difiiculty is encounred in preventing leakage of the water, and 11's is a very important matter since the wire is uicased by means of compounds which lose ifectiveness when wet. In certain other ders the die rests in a recess in a water o led metal body, with no provision to ensure ra id transfer of heat from the die to the surrounding metal, so that the die is not cooled to the extent desired. Other prior die holders are very difiicult and expensive to manufacture.

It is accordingly one object of the invention to provide a fluid cooled die holder which will be free from leakage and capable of withdrawing heat in efiloient manner from an associated die.

It is a fur h r object of the invention to provide a s' ple and inexpensive fluid cooled die holder will gip the die firmly and ensure rapid absorption of heat from the die.

With these and other objects in View, as will be apparent to those skilled in the art, the invention resides in the combination of parts set forth in the specification and covered by the claims appended thereto.

Referring to the drawing illustrating one embodiment of the invention and in which like reference numerals indicate like parts,

Fig. l is an elevation of a fluid cooled die holder with a die mounted therein;

Fig. 2 is an end view of the device;

Big. 3 is a section on the line 3-3 of Fig. 5;

Fig. 4 is a section on the line l-tl of Fig. 3;

T 5 is a section on the line Ei5 of Fig. 1;

and

Fig. 6 is a section on the line iil of Fig. 5.

The embodiment illustrated comprises an upper member l and a lower member ii therebeneath arranged to clamp a cylindrical wire-drawing die l 2 between them. These members are rectangular hollow metal castings, preferably of bronze, and their adjacent faces are recessed to form a horizontal cylindrical bore it of the proper size to receive the die. An inwardly extending flange i is provided at one end of the bore to form ester, Mass, assignor to Company,

Worcester,

a shoulder which will support the die against the pull of the wire traveling therethrough.

The members it and ii are connected at one end by a suitable hinge so that they may swing apart sufiiciently to loosen their grip upon the die and allow it to be removed. For this purpose the upper member it is provided at one end with a pair of depending spaced lugs ill, and the lower member i l is provided with 2. lug it which exends upwardly between the lugs ll. A horizontal hinge pin lil extends through the lugs, this pin preferably having a drive fit in the center lug l3 and being free to turn in the lugs ii. The bore id is located somewhat closer to the hinged ends of the castings id and ii, and their other ends are connected by a vertical bolt 2! which extends through bosses 22 on the castings. The upper end of this bolt is provided with a wing nut 23. t will be apparent that by tightening the nut 23 the castings can be drawn together and the die will be firmly gripped in the bore it, thus ensuring rapid transfer of heat from the die to the castings.

The heat which reaches the castings l8 and H is absorbed by a stream of cooling fluid, such as water, which flows continuously therethrough. For this purpose the upper casting H3 is shaped to provide a chamber 25 having an inlet opening 26 adjacent the hinged end and an outlet opening 2? adjacent the other end. Similarly the lower casting ll is shaped to provide a chamber 29 having an outlet opening 38 adjacent the hinged end and an inlet opening ill adjacent the other end. These four openings are tapped for the reception of pipe connections. A supply pipe 33 is connected to the opening 3i, and a discharge pipe 3:; is connected to the opening El. The openings 2t and 83 are connected by a U-shaped conduit 35 preferably formed of soft copper tubing, which is relatively flexible in order to allow a slight movement of the castings about the hinge pin 59. In order to increase the rate of heat transfer to the water, ribs N are provided on the outer side of the wall of the bore 5 3 in each castm In operation the die holder will be mounted in any suitable die box, a die G? will be placed in the bore i i, and the Wing nut 23 Will be tightened to clamp the castings tightly about the die. Water will be delivered to the chamber 29 from the pipe 33, and then flow through the tube 35 to the chamber 25 and the outlet pipe 3 Heat generated by the Wire-drawing process will be absorbed and carried away by the water, thereby preventing the die from reaching too high a temperature.

It will now be apparent that the invention provides a very simple and inexpensive fluid-cooled die holder. The two principal members H) and H are simple castings which can be manufactured very easily. Each of the chambers 25 and 29 will be formed by a core which can be supported in the foundry mold by core prints at its opposite ends, corresponding with the inlet and outlet openings at opposite ends of the chamber. Very little machine work is required. In fact the only machining operations necessary on these castings are the drilling of the holes for the hinge pin l9 and the bolt 2 l the drilling and tapping of the four holes for the pipe connections, and the finishing of the bore l l. This bore will be finished after the hinge pin H] has been inserted, with the two castings held a slight distance apart.

These are all ver simple operations, and the cost of manufacture will be comparatively low.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1. A die holder comprising two separate hollow members shaped jointly to provide a recess for the reception of a wire-drawing die, means to urge the members toward one another and thereby clamp the die between them, a fluid conduru connecting the two members, means to supply cooling fluid to one member, and means whereby fluid may escape from the other member,

2. A die holder comprising two separate hollow members shaped jointly to provide a cylindrical bore for the reception of a wire-drawing L die, means to urge the members toward one another and thereby clamp the die between them, a fluid conduit connected at its ends to the respective members, means to supply cooling fluid to one member, and means whereby fiuid may es-- cape from the other member.

3. A die holder comprising two separat hollow members of cast metal shaped jointly to provide a recess for the reception of a wire-drawing die, means to urge the members toward one another and thereby clamp the die between them. a fluid conduit of relatively flexible material connected at its ends to the respective members,

means to supply cooling fluid to one member, and v means whereby fluid may escape from the other member.

4. A die holder comprising two separate elongated hollow members hinged together at one end and shaped jointly to provide a recess for the reception of a wire-drawing die, means to urge the members toward one another and thereby clamp the die between them, a fluid conduit of relatively flexible material connecting the members adjacent their hinged ends, means to supply cooling fluid to one member, and means whereby fluid may escape from the other member.

5. A die holder comprising two separate elongated hollow members of cast 'metal hinged together at one end and shaped jointly to provide a recess for the reception of a wire-drawing die, means to urge the members toward one another and thereby clamp the die between them, each member having two openings in its opposite ends, a U-shaped conduit of relatively flexible material connecting the openings in the hinged ends of the members, and means to supply cooling fluid to the other opening in one of the memhere.

6. A die holder comprising two separate elongated hollow members of cast metal hinged together at one end and shaped jointly to provide a recess for the reception of a wire-drawing die, a bolt connecting the other ends of the members to pull them together and thereby clamp the die between them, each member having two openings in its opposite ends, a U-shaped conduit of relatively flexible material connecting the openings in the hinged ends of the members, and means to supply cooling fluid to the other opening in one of the members.

'7. A die holder comprising two separate hollow members shaped jointly to provide a recess for the reception of a wiredrawing die, means to urge the members toward one another and thereby clamp the die between them, and means to supply cooling fluid to the interior of the members.

8. A die holder comprising two separate juxtaposed hollow members with their adjacent faces provided with substantially semi-cylindrical recesses which jointly provide a pocket for the reception of a wire-drawing die, means to urge the members toward one another and thereby clamp the die between them, and means to supply cooling fluid to the interior of the members.

PHINEAS A. BEAMAN.

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