US2132581A - Die-holder - Google Patents

Description

Oct. 11, 1938'. I I w J; SCHUSTER v 2,132,581

DIE HOLDER Filed Nov. 27, 1936 2 Sheets-Sheet l [wow aim".-

W/L MM .1 \5CHU TEE,

Oct. 11, 1938. w. J. SCHUSTE-R DIE HOLDER Filed Nov. 27, 1936 2 Sheets-Sheet 2 [mentor lV/L MM 60/05 TEE,

Patented, Oct. 11, 1938 William J. Sol luster, Cleveland, flhimfassignor to The American Steeland Wine Company of New .Jersey', afcorporation oflfNew Jersey Application November .27, 1936, Serial No. 113,051

whim (error-e This invention relates to die-holders and particularly to air or fluid-cooled die-holders As a general rule, any tool working on metal, for an appreciable period, becomes very hot'. Dies I 5 used in drawing wire are no exceptionto this rule and it is quite a problem to dissipate-the heat generated in the' wire drawing operation so that the die does not reach a temperature which prohibits further continous use, that is, a temperature at'which the die or wire, or both, become damaged. This problem is magnified by the desire to use the die for relatively long periods and at high drawing speeds. i

Thepresent invention has for its objectthe provision of an improved type of die-holder which is adapted to cool the die held therein by taking heat from the die byconduction andrapidly transmitting it to air by means of a comparatively large radiating surface in contact with a 29 stream of air.

The above and other objects will become apparent as the description proceeds and by reference to the accompanying drawings, in which:

Figure 1 is a plan of a die-holder constructed in accordance with my invention;

Figure 2 is a sectional elevation taken on line II-II of Figure 1;

Figure 3 is a sectional elevation taken on line IIIIII of Figure 2; and

Figure 4 is an elevation of the means which mount the die-holder on the base.

Referringto the accompanying drawings, the letter H refers generally to a die-holder which is supported, for example, by a base-plate 4. To

assistthe base-plate 4 in properly supporting the die-holder H,.it is provided with a circular recess 6 in its upper surface and a boss I on its bottom surface directly underneath the recess 6. The base 4 is usually mounted on a table support 8 with the boss 1 extending into a hole'in said support. Preferably, bolts l0 and I2, received in a hole I4 and a slot l6,'respectively, in opposite ends of the plate 4, are employed to secure the plate 4 to the support 8. By mounting the base 4 in this manner, it can be'moved through a small are using the bolt ID as a center to properly align the die-holder H with a wire block (not shown).

An aperture l8 is provided in the base 4 0 through the bottom of the recess 6 and is threaded at its lower end to receive a pipe 20. The pipe 20 is adapted to be connected with any suitable means for supplyingit with air or other fluid under pressure so that a stream of fluid can be forced into the aperture I8.

I "I'he-die -'-holder' Hhas an H-shaped bottomplate 24"'h'aving a boss 26 on its bottom which snugly fits in the recess 6 of the base 4. The insideedges of two diametrically opposite arms of the'plate 24 are provided'with semi-circular recesses 25 -and'25 which are adapted to overlie apertures Hand 23 inzthe base 4. The apertures 22 and 23 have shoulders intermediate their ends T' In-order to firmlyi hold "the die-holder H to the 10 base4 by quickly rele'asable means which facili tate changing die-holdersybolts 21 are provided which extend through the apertures 22 and 23 of the base 4 andthe recesses 25 and 25 of the plate 24 when they'are aligned with said aper- 1'5 tures. The bolts 21 have flattened ends to which are pivotally secured levers 28 having U-shaped' heads which have cammed bottom surfaces adapted to releasably engagethe plate 24. The bolts 21 are preferably retained in their vertical :0 positions,-even--though the plate '24 is removed,

by means of integral flanges which bear upon the shoulders in the apertures 22 and 23. The vertical position and clamping action of the bolts 21 and the levers 28 can be adjusted by varying the 35 positions of nuts 33 on the ends of the bolts 21. As the bolts 21 and thereby the levers 28 are held up, it is quite easy to put the boss 26 of the plate 24 in the recess 6 of the base 4 so that by rotating the die-holder H the recesses 25 and 30 25 engage the bolts 21. Then the die-holder H is readily secured in place by moving the levers 28 down so that their cammed surfaces bear down on the plate 24.

The plate 24 has a cylindrical casing 36 as part 85 of its integral casting. The casing 36 extends along the cross-arm of the H-shaped plate 24 and has end flanges 38 and 39 extending out perpendicularly to its axis. An aperture 4 is provided in the casing 36 and the plate 24 so as. to 40 pass through the boss 26 and align with the aperture I 8 in the base. This is a convenient method for introducing a stream of air or other fluid into the casing 36 as the pipe 20 supplies compressed fluid to the hole [8. A baflie 4| is 45 adjacent the aperture 40 and extends the length of the casing 36 on its inner surface. A rectangular port 42* is provided in the wall of the casing 36 immediately above the bafile 4|.

The flanges 38 and 39 have apertures in them which align with apertures in circular plates 42 I and 44 so that bolts 46 can secure the plates 42 and 44 to the casing 36. The plates 42 and 44 have large apertures 48 in their centers and flanges 50, of a slightly larger radius than the 55 apertures 48, extend around said apertures on the inside surface of said plates. The portions of the plates 42 and 44 adjacent the apertures 48 are beveled so that a smooth finish is obtained.

The actual die-holding member of the dieholder H is a cylinder 52, preferably a separate piece, positively secured by the plates 42 and 44 bearing upon its ends and by the flanges 50 fitting into recesses in the'ends of the cylinder 52. The cylinder 52 has fins 54 of varying lengths, but preferably on the same circumference, extending out from and entirely around the body of the cylinder 52 except where the baffle 4| protrudes from the casing 36. Preferably, the diameter of the fins 54 is slightly'smallerthan the inner diameter of the cylinder 36 so that, when a stream of air or other fluid is forced through the pipe 29 and aperture 45 in the casing 36, it readily flows around the cylinder 52. The baiiie 4! makes the air flow around the cylinder 52 in' one direction and exhaust through the port 42 As the fluid flows around the cylinder 52, the large surface area of said cylinder, due to the fins 54, allows a large quantity of heat to be taken from the cylinder 52 by radiation and absorption.

A round-die isheld in the'cylinder 52 by any suitablemeans such as a shoulder52 in an axial opening 64. gradually diminishes inwardly in diameter, terminating at the shoulder 62, and the opposite end likewise diminishes; inwardly in diameter, terminating ina cylindrical die-receiving bore 65. The bore snugly receives the die 60 so that when wire is drawn through the die 60 in the direction indicated by the arrow in' Figure 2, said die bears on the shoulder 62 and is firmly fixed in place. The above described heat loss of the cylinder 52 acts to cool the die 60 held in it as the die 60 will lose heat to the cylinder 52 as long 40 as it is at a lower temperature than said die.

It will be appreciated that the specific form of One end of the opening 64.

'to said base for circulating air through said casing.

2. In combination, a die, a holder for said die, a casing surrounding and secured to said holder,

a base for said casing, means releasably securing said casing to said base, a support, means mounting said base on said support for limited aligning movement and means fastened to said base for circulating air through said casing. ,3 In combination, a die, a holder for said die, a casing surrounding 7 said holder, said holder having like means ateach end thereof for attachment to said'casing, a base for said casing, means securing said casing .to said base,- a support, means mounting said base on said'support and means permanently fastened to said base for circulating air through said c asing.

4. In combination, a wire-drawing die, a hollow cylinder .adaptedto receive said die, a pair of plates each having an opening therein, a casing attached to and disposed between said plates, flange-like means carried by each end of said cylinder adapted to cooperate with a similar flange-like means on the inner walls of said 3 plates to position said cylinder therebetween within said casing, and means for circulating a cooling fluid between said cylindeii and said casing. a

WILLIAM J. SCHUSTER.

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