Патент USA US2124967код для вставки
July 26, 1938. G, WOODWARD " _ 2,124,967 WIRE DRAWING DRUM Original Filed Nov. 22, 1935 J/ INVENTOR _ 2,124,967 Patented July 26, 1938 UNITED ‘STATES PATENT QFFlCE 2,124,967 WIRE DRAWING DRUM George Woodward, West Orange, N. J., assignor to Igoe Brothers, Newark, N. J. Application November 22, 1935, Serial No. 50,998 Renewed January 4, 1938 1 Claim. (01. 205-20) This invention relates to a wire drawing ma chine that accomplishes two or more succes sive drawings of the same Wire in a continuous process and accomplishes this by substantially equalizing the tension on the wire throughout its drawn length. The machines formerly employed for this pur pose were expensive and unsatisfactory. The ex pense was caused by complicated mechanism such 10 as differential gearing and other means of com pensating for the speed of the wire as it is drawn by one drum on its ?rst drawing and then drawn and coiled on the second drum. In order to se cure uniformity of ?nish and size the tension 15 of the wire is maintained by the present ma chine. The invention is designed to provide an eco nomical machine which requires no differential gearing since both drums can be rotated at the 20 same speed at which the wire is moving which allows them to be driven on the same shaft. This economizes in space and power. The manufacture of wire from bars leaves the wire with a scale which must be removed. The 25 scale is removed after the pickling process by water under pressure and the wire is then al lowed to stand and a green coating forms on the wire. The coating is washed off lightly and the wire is then put into a hot lime bath. The wire 30 is then racked and dried. This leaves the wire with a thin coating that acts as a lubricant when the wire passes through the die. The present device by rotating the drums at a speed constant with the speed of the wire prevents any scraping 35 of this coating and this in turn assists in the drawing due to the presence of the coating and, in consequence, the dies last longer and the drawing is easier and more satisfactory. The invention also relates to certain details 40 of construction which will be hereinafter more fully described. ‘ The invention is illustrated in the accompany ing drawing. Figure l is a diagrammatic view of my improved machine. Figure 2 is a side view 45 of the two drawing drums with the lower part shown in section. Figure 3 is a bottom view of ?gure 2 with the bottom plate removed. A diagrammatic view is presented in Figure 1, showing a die H] which is the ?rst die through 50 which the wire passes and a second die ll through which the wire is drawn. a second time. The wire is drawn through the ?rst die [0 by a drum l2 and is returned to the second die, usually over a pulley I3 and then drawn through the die H 55 by the drum I4. The wire passes around the drum [2 three or four turns and on the drum I4 it is coiled into the coil I5 for the proper length to provide the required size of coil and then removed as the product of the machine. The drums l2 and I4 rotate at the same speed and are usually secured together or to the same shaft I6. The drum I4 is a convenient drum usually with a tapered periphery and of considerable height with a projecting apron I l at the bottom. The 10 top is open to permit the lifting and removal of the coil l5 of wire when the coil has reached the desired or predetermined weight. The drum I2 is designed to include a slipping or lost-motion feature to slip in order to prevent 15 the drum l2 passing along more wire to the sec ond die than the drum M can take. This must be done without injury to the wire on the drum l2. The construction must be such‘ that the wire engaging part of the drum I2 rotates at a speed 20 that is the same as the speed of the wire in order that no scraping takes place to remove the coating from the wire. The form of drum i2 is preferably made of 0 a top plate l8 and a bottom plate l9 secured 25 together, as by the screws 20. One of the plates has an annular ?ange or wall 2! extending to the other plate. Outside this Wall is the slip ring 22 usually made up of sections 23 that are are shaped and normally slightly separated as at 24. This clearance allows the sections to- move in wardly to a limited extent. The two plates 18 and i9 have opposed ?anges 25 and 26 which con?ne the ring sections 23 against outward movement. If desired, I may place an annular 35 backing 2'! in the form of a ring or split ring, this backing being of material such as of asbestos, ' ?bre, or the like or any resilient means that is compressible such as springs. This drum, with or without the ring 21, allows the sections 23 to 40 move inwardly to slightly reduce the diameter of that part of the drum that receives the coil, that part being the periphery of the slip ring formed by the sections 23. The ?anges 25 and 26, particularly the latter, act to prevent coating 45 from the wire from working in behind the rings or segments 23. The presence of the coating on the inside face of the parts 23 causes them to bind and they will not slip on the wall 2|. In order to prevent this andvinsure slipping of 50 the parts under pressure the ?anges, especially the ?ange 26 acts to ward off and collect the coating which does not enter behind the ?ange nor behind the split ring parts. It will be evident that in the event of excess 55 2 2,124,967 drawing by the drum I2 the increased tension on the few laps of wire on the slip ring will cause the tension on the wire coming from the die [0 to be relaxed and no excess of wire will be fed to the die H or the drum M to cause any looping of the wire between these elements of the machine and the wire passing around with the drum I2 will not be subjected to any scrap ing to remove the coating. 10 I claim:-— A drum for wire-drawing machines compris ing a top plate and a bottom plate, one of said plates having an annular wall extending to the other plate, means for securing said plates to gether, a sectional slip-ring surrounding said Wall, said ring having a recess on the bottom 5 edge of its outer wall, a ?ange on the bottom plate and ?tting said recess, a ?ange on the top plate overlapping the top edge of the ring, and. a resilient medium between the wall and the ring. 10. GEORGE WOODWARD.