US2712381A - Water cooled wire drawing block - Google Patents

Description

July 5, 1955 c. o. BRUESTLE WATER COOLED WIRE DRAWING BLOCK 2 Sheets-Sheet 1 Filed Jan. 9, 1951 July 5, 1955 c, o. BRUESTLE 2,712,381

WATER COOLED WIRE DRAWING BLOCK Filed Jan. 9, 1951 2 Sheets-Sheet 2 United States PatentO 2,712,381 Y WATER COOLED WIRE DRAWING BLOCK. Carl 0. Bruestle, Metuchen, N. J., assignorto Syncro Machine Company, Perth Ambo N.*J., a corporation of New Jersey r Application January 9, 1951, Seri'al'No. 205,179

4 Claims. (Cl. 205-20) This invention relates to a water cooled wire blockfor use in wire drawing machines and particularly to a water cooled coiler block which provides for directing a film of cooling fluid onto the inner surface of the core of the block on which the wire is wound.

In the art of wire drawing and coiling products many devices of this character have been employed which involve one cooling means or another, and principally revolve about playing a water jet against the inner surface of the block. Though such devices are of greater or lesser degrees of effectiveness, they are based on the theory of moving a large mass of water past the surface to be cooled in order to accomplish the desired; objective. In contrast thereto, and recognizing that where heat transfer is taking place from a solid surface to a liquid, the principal barrier to effective flow of heat is in a thin film of liquid adjacent to the surface, applicant hasas the first object of his invention theprovision of an apparatus in which the cooling of the wire block from the-interior thereof is done by directing a moving film of water against the surface to be cooled. 3

Another object of the invention is to provide a water cooled coiler block wherein the thinnest portion of the cooling water film is applied to the inside against that surface subjected to the highest degree of heating.

It is another object of the invention to provide a water cooled coiler block structure in which the passage of water in a thin film is most rapid past the surface subjected to the highest degree of heat.

Other objects and advantages of the invention will in part be obvious and in part appear hereinafter.

The invention accordingly is embodied in a coil block structure for a wire drawing machine, which, in characteristic fashion, has a tapered conical core, the broadest portion of the taper being adjacent the end flange to which the wire is fed to be sprung upward as the core is ro tated about a vertical axis, the coiler block being characterized by an internal structure providing for mounting the block on a shaft held in a vertical position, the core being hollow and containing baflles for directing and maintaining a cooling fluid film between a vertical baffle and the inner surface of the core, the fluid being fed to a pool maintained under the block from which the cooling fluid finds its way to an exit or drain pipe. The invention thus is embodied in a water cooled block having the features of construction, combinations of elements and arrangement of parts hereinafter to be described in greater detail.

In the drawings:

Figure 1 represents a plan view of the block showing the general conical structure thereof and the relative location of the cooling fluid inlet and outlet;

Figure 2 is a side elevation of the inner stationary baifle which in the device is aligned with the lower portion of the core of the coiler block, the baffle having grooves thereon for forcing the cooling fluid film olf the inner surface of the core and down into the reservoir;

2,712,381 Patented July 5, 1955 Figure 3 is a section taken along the line 3-3 of Figure 2; and

Figure 4 is a detailed sectional view of the coiler block taken along the line 4-4 of Figure 1. Referring specifically to Figure 4, there is shown drive shaft 10, carrying bevel gear 11, the shaft being mounted in bearings 12 and 13 afiixed to the machine base 14. Conventionally, the driving mechanism is housed in the base unit 16, which has the closure 17 at one end thereof to provide access to the several parts. The driving portion is substantially conventional.

Meshing with the bevel gear 11 gear 20, connected to shaft 21 which is carried in bearings 22, the shaft continuing on to practically the full height of a coil block and terminating in flange 23 and closure bolts 24-for holding a particular block in place. The shaft is also held in accurate vertical alignment'with the internal supporting structure 25, which'is mounted on the base of the machine, by means of bearings 26 andtcap 27, which constitutes a collar fastened to support 25 in which space 28 is aligned. The support 25 is stationary and forms a fixed part of the machine instant structure, is formed with the lower circumference thereof turned outwardly and upwardly, as at 29, to define an inner chamber 30, which is a circumferential chamber serving as a reservoir in the base of the block.

Mounted on the vertical support 25 and held in fixed relationship'therewith, is thebaflle unit 31, which has the inner opening thereof reentrant and matched to the diameter of the vertical support 25 andheld in fixed position thereon by a set screw. The form of the battle is such that it defines a downwardly depending skirt 32, which terminates at about the upper level of the circumferential chamber 30. Coiler block 40 fits over shaft 21Jand at .its base isflanged outwardly as at 41 to define a cover for the chamber 30. It will be observed that a small clearance is left between the flange 41 and the upwardly turned edges 29. Formed on the underside of the cover 41, is the downwardly depending flange or skirt 42, having an outer circumference substantially matching the inner circumference of the upwardly turned edges 29 so that it travels in that opening and reaches down toward the level of fluid in the reservoir.

An inlet conduit 50 for cooling liquid is threaded into an appropriately tapped inlet 51 in the base member 25, the conduit leading to a vertical standpipe 52, which extends to a height well up into the core of the coil block. The terminus of thestandpipe 52- is placed at a level above the lower end of the skirt 53, mounted on the coil block itself. The standpipe 52 also passes up through the skirt 31.

Details of construction of the skirt 31 Figure 2, where it appears that the lower portion 32 carries grooves 60, 61, 62, etc., which are inclined, for example, as elements of helixes to aid in causing the cooling liquid to flow through the block.

As indicated, the basic theory of the operation of the coil block is to provide the most effective possible cooling at that portion of the block receiving the heaviest heat load from the wire drawn and coiled thereon. In normal operation, wire 70 is fed onto the coil block as indicated in Figure 4 and is hottest at the point where it first meets said block. As the wire cools the taper of the core and the additional wire being fed thereon at the point 71 causes the coil to travel upward, and ultimately it is removed from the block.

It is apparent then that the greatest heat load is carried by the block at about the point 71 and in that general area. Accordingly, provision is made to have a relatively rapidly moving thin film of water playing past the inner surface of the core at that area, which is accomplished by reducing the clearance between the inside diameter are shown in is the matingbevelbed 16 and, in the.

of'the block and the skirt 31 to the minimum practicable extent and by providing the grooves'on the skirt31,'so as to encourage the sweeping of the water past that area.

Thus, in operation,.the block will be operated at its conventional rate of speed and take up wire. Cooling liquid, for example, water, will be fedinto the conduit 50 to be discharged from the standpipeSZat a level slightly above the bottom of the skirt 53. The rate'of' feed of water is suificient to cause wetting of the skirt and maintenance. of a level of water at about'54 in that portion of the chamber. This water is then fed downward through the small annulus formed by the core and the skirt 31 until it reaches the smaller annulus defined by the end'32 of the skirt, and the core and is finally discharged into the chamber 30. It builds up only slightly in chamberf30 for thesize of discharge pipe'55 is made such that an overflow .does not occur.

"The internal structure of the shaft is essentially conventional and the lubricating systemprovided therefor includes conduit 80 which feeds oil into the channel 81 which in turn passes oil to the b3fll1g2, which oil finds its way out through conduit 82.

Having described the invention with only a single embodirnent thereof, it will be apparentthat the fundamental principle is the maintenance of the film of liquid adjacent the greatest heat load of the apparatus, and .the invention can be practiced with variations of the single structure shown herein without departing from the spirit or scope thereof.

What is claimed is: V

1. In a wire drawing apparatusa coiler block rotatable about a vertical axis, said block having a core about which wire is coiled, said core having a smooth interior walLasupport for said block having a circumferential recess therein below said block for receiving a pool of cooling liquid from the block, a conduit feeding cooling liquid through said support up into the core of the block, a stationary bathe unit within the core of said block, a narrow annular passage formed by saidba'file and said smooth interior wall of said core guiding said cooling liquid over the'inner'surface' of the blockas a thirr'filrn and discharging the cooling liquid directly into said circumferential recess.

2. In a wire drawing apparatus, a coiler block rotatable about a vertical axis, said block having a section about which wire is coiled, said block :having a smooth interior 'wallin said-sectioma support beneath theblock enclosing therein to prevent the cooling water from adhering to the interior walls of the block.

4. In the structure in accordance with claim 2, the bafile means defining said annulus having grooves formed in the outer wall thereof, saidgrooves being substantially parallel to 'theaxis of the coiler block, said grooves presenting sharp-edgeswhich prevent the cooling water from adhering to the interior walls of the block.

References Cited in the file of this patent UNITED STATES PATENTS .1-;828;922

Carroll Oct. 27, 1931 2,167,397 Tideman July- 25, 1939 ..2',2l1',392 Taylor Aug..13, 1940 2,241,956 "Nye May 13, 1941 2,267,564 "Mcllvried Dec. 23, 1941 FOREIGN PATENTS 1,483 Great Britain 1909

Images