US2234976A - Wire cutting machine - Google Patents

Description

March 18, 1941.

F. C. MUNTWYLER wrmz: CUTTING momma Filed Jan. 15, 1940 4 Sheets-Sheet 1 March 18, 1941.

F. C. MUNTWYLER wmn cu'rnm IACHINE Filed Jan. 15, 1940 '4 Shuts-Sheet 4 Patented Mar. 18, 1941 Fredric (l. Himmler,

Wire Sales Company, tion of Illinois Oak Park. m. assignor to Chicago, 111., a corpora- Application 1min 15 1940, Serial No. 313,855

a '1 Claims. (01. 140-148) The machine of the present invention is designed for the purpose of severing imiform sections from a continuously fed wire and is pro-' vided with means for regulating the length of the sections so cut.

The object of the invention is to increase the speed of the'cutting operation by feeding the wire continuously rather than intermittently in the manner commonly employed in the severing of wire sections. 7

The above results are obtained by employing a movable wire guide which at uniform intervalsflexes the advancing wire laterally into the path oi the cutters and to the means provided for timing such flexions in ratio to the feeding speed at the wire" so that each cut will sever a section of uniform length depending upon the cooordinated adjustment of the various portions of the machine. a

Farther objects and details will appear from the description of the invention in conjunction with the accompanying drawings, whereine l is a side elevation of the machine as a "whole:

Fig. 2 is atop plan view of the machine showhis portions of the casing removed;

Fig. 3 is anenlarsed cross sectional elevation taken on line 3-3 of Fig. 2 showing the gear M1121 and cam for actuating the oscillating wire sui e;

Fi 4 is a longitudinal sectional elevation taken on line 4-4 of Fig. 3 showing the wire guide and cutters;

Fig. 5 is a sectional plan view of the same parts rm. '1 and a are details in plan showing the osclllating wire guide in its two positions oi! movettti meat: and v g. 9 is a cross sectional elevation taken on line 8-9 of Fig. 2 showing the wire feeding mecha.

The machine as a whole is mounted upon a rectangular base comprisinga front wall il, a rear wall, II, and end walls It and".

the base at the entering end for the wire pro vides support for a grooved guide roller ll, bemonth which the wire W is fed and thence passes between a group of wire straightening rolls Ii and between upper and lower feed 'roils II and H, which are driven at the desired feeding speed by means presently to be described.

The wire fed forwardly by the bite of the feed rolls passes through a second straightener it of the position II which is slidably mounted within a guide 3i well known type, in the form of a rapidly driven tube provided with sets of inwardly projecting fingers II, which are slightly staggered at their inner wire contacting ends, so that as the straightener is rapidly rotated all slight bends or 5 kinks in the wire will be eliminated. Mechanism of this character is commonly employed in the art for straightening purposes, so that further detailed description is deemed unnecessary. The

leading end of the wire thus straightened passes 10 through an oscillating tubular wire guide 20 which, in conjunction with the rotary cutter rolls ill and 22 having coacting cutter blades 23, constitutes the essential feature of the present invention. The axes of the cutter rolls extend transversely oi the line of travel of the wire, and the surfaces of the rolls adjacent the cutter blades are spaced to permit the free travel of the wire between the roll surfaces which rotate in 1.

unison in the direction of traveloi thewire.

Referring to Fig. 4, the wire guide is in the term of a longitudinally extending tube through which the wire freely passes. The wire guide,

near its rear end, is entered through the head 24 of a vertical rocking stem iii journalled through a bracket 26 located slightly to the rear of the rotary cutters 2| (15 .22; The rocking stem at its lower end mounted thereon a collar 21 which receives the lower end of a coil spring 28, the upper end of which is socketed within the journal bracket 2|, so that normally the oscillatinl be held in the position shown in Fig; I; which permits the wire to travel forwardly and to the rear of the cutter blades 23' carried by the rotary cutter rolls. At recurrent intervals, however. theguide will be swung into shown in Fig. 8, which brings the wire into the path of the cutter blades, so that at the proper instant a section of wire will be severed and delivered" into a trough or receptacle 29 located at the delivery end of the machine. v

The wire guide 20 is oscillated at suitably timed intervals by the mechanism best shown in Fig.3. This i includes athrust bar carried by the front wall of a boxlike housing I2 supported upon the'basc frame of the machine. Within the housing is located a cam shaft 3] which mounts a-cam 34 provided with, a high spot II bar dlwili be momentarily thrust outwardly. thereby windin the oscillating wire Ill dcto bring the wire in position to be severed by the cutters. The cam shaft is mounted within journals ll and I1, and at its outer end so disposedthat with each rotation of carries a spur pinion 38 meshing with an idler justment of the segment with the pinionscarried thereby, so that by employing a pinion 38 of the desired size, and adjusting the position of the stub shaft 40, variations in speed ratio can justed in reverse relation to one 'tion 68, and the screw be made with a resultant variation in the timing of the oscillating wire guide.

The jack shaft 42 at "its inner end mounts a bevel pinion 48, which meshes with a bevel pinion 49 carried by the cutter shaft 50 which at its forward end carries the lower cutter roll 22,thu s establishing the desired speed ratio'between the rotation of the cutter rolls and the oscillating periodsoi the wire guide. The cutter shaft 50 carries a spur pinion Bl meshing with a spur pinion 52 on a jack shaft 53 which carries the upper cutter 2|. The jack shaft 53 is mounted within a journal bracket 54 slidably mounted within the front wall of the housing and adapted to be vertically adjusted by means of a screw 55 entered through the top wall of the housing, which arrangement permits limited adjustment oi the spacing between the cutter rolls and the cutter blades carried thereby.

The cutter shaft to is carried by obliquely disposed roller bearings 56 and 57, and the iacl: shaft 53 by obliquely disposedroller bearings 5d and so. The cam shaft as is so mounted that it" extends longitudinally of the machine and between the shafts 50 and 53, as shown in Fig. 6. The cutter shaft so at its rear end is connected by a coupling 60 with areducing train of any suitable form for establishing the desired peedratio between the rotation of the feed rolls it and i1 and the cutter shafts and parts in train therewith. As shown for purposes of illustration only, the coupling 60 unites the cutter shaft W with a shaft section 6! carrying a pair of opposed beveled pulleys 62 adapted to be moved toward and from one another by the adjusting arms 68 carried by a right and left threaded adjusting screw 64.

The beveled pulleys G2, which constitute the driving elements, cooperate with beveled driven pulleys 65 adjustable by arms 66 mounted upon a right and left adjusting screw 61 having its threads in opposed relation to the threads of the adjusting screw member. The screw members are moved in unison by a sprocket connecmember 64 is manually adjusted from the front of the machine by means of a hand wheel $9 on the forward end of a shaft 10 connected through .a sprocket chain H with. the adjusting screw member 67, so that, by adjusting the latter, the pairs of beveled pulley members 85 and 62 will be simultaneously adanother to vary the speed ratio between the shaft BI and ashaft 12, the beveled pulley members being connected by a belt '13. The shaft 7! drives a sprocket-connection it which imparts rotation .to the lower wire iced roller I 'i which is mounted upon the forward end of a shaft 15 journalled by roller bearings 78 within a housing TI. is mounted upon the shaft 18 journalled by ried by a slide bracket an mounted within the forward end of a lack 40 which also carries the' The upper feed roller I 5 roller bearings 19 car-- arated slightly to afford easy introduction of the wire or vary the spacing as occasion may 7 require.

The detailed construction of the cutter rolls 2| and 22 is best illustrated in Figs. 4 and 6. Each of the cutters is in the form of a disk having 'a hub a: and cooperating with a ring 84 having in its inner face one or more grooves 85 (Fig. 5), which socket the chisel shaped cutter blades 23, the parts being held together by dowels 86 and cap screws 81, and the inner end of each cutter blade bearing against the hub 83 of the cutter. This gives to the assembly the form of a cylindrical roll having projecting from its middle surface one or more chisel shaped cutter blades adapted to coact with a similarly mounted blade or blades on the companion roll.

Operation proper gear ratio is employed in the driving train for the cutters so that the coacting blades will arrive at the cutting at at the instant the desired length of wire has been fed forwardly.

The cutters rotate toward direction of advance of the wire, so that,even though the wire be traveling ata rapid rate of speed, a clean cut will be eil'ected without pause in the advancement of the wire, and the severed sections will be thrown forwardly and accumulated in the bin or receptacle provided therefor. If, therefore, it is desired to uniformly cut sections of two feet in length for example, the machine will be adjusted to feed this amount of wire forwardly in accurately timed relation to the arrival of the cutter blades at the point of severance, and the oscillating Wire guide will also be timed to this ratio, so that by establishing proper timing between these three instrumentalities, accuracy in the cutting 0d of the wire sections will be insured.

The machine as a whole is of simple and rugged construction, and by operating the ruechine continuously rather than intermittently the speed of operation can be materially increased and wear and tear on the operating parts one another in the reduced to a minimum. I

Although the invention has been described with particularity as to details, it is obvious that numerous changes in the construction may be introduced without departing from the spirit of the although the machine 6 in the straight line of advance of the wire delivered from the feeding rolls and through which the wire is fed, said wire guide adapted to have its forward end moved laterally, means for recurjacent to the normal path of movement of the wire and adapted in conjunction to sever lengths of wire when the wire guide is moved laterally to bring the wire into the path of the cutter blades,

and driving connections between the wire feeding rolls, the means for moving the wire guide, and the cutters, for actuating the parts in timed relation to one another, and continuously rotating the cutter blades in unison in the direction of travel of the wire. 7

FREDRIC c. MUNTWYLER.

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