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Publication numberUS3675837 A
Publication typeGrant
Publication dateJul 11, 1972
Filing dateSep 3, 1970
Priority dateSep 3, 1970
Publication numberUS 3675837 A, US 3675837A, US-A-3675837, US3675837 A, US3675837A
InventorsGerould David S
Original AssigneeWeld Motion Inc
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Wire feeder
US 3675837 A
Abstract
In a wire feed system as used, for example, to feed weld wire, there is a positively driven roll in a fixed location and a complementary pressure roll which, together with the means providing the wire feed track, floats to and from the feed roll rectilinearly on the common diameter of the two rolls to accommodate variations in wire dimension, the pressure roll and wire guides being subject to spring bias pre-set at the proper value for a given wire diameter.
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Description  (OCR text may contain errors)

United States Patent Gerould [4 1 July 1 l, 1972 54] WIRE FEEDER 3,026,012 3/1962 Clay ..226/l87 [72] Inventor: David S. Gerould, Appleton, Wis. Primary Examiner Auen N Knowles [73] Assignee: Weld-Motion, Inc., Appleton, Wis. A i mm Examiner-Gene A. Church [22] Filed: Sept. 3, 1970 Attorney-Wheeler, House & Wheeler [2]] Appl. No.: 69,407 57 ABSTRACT In a wire feed system as used, for example, to feed weld wire, U-S- Clthere is a positively driven on in a fixed location and a com. [51] Int. Cl ..B65h 17/22 plememary pressure which together with the means [58] Field Of Search ..226/l82, 188, 181, .194, 198, providing the wire feed track, floats to and f the feed r0" 226/177 242/157 rectilinearly on the common diameter of the two rolls to accommodate variations in wire dimension, the pressure roll and [56] References C'ted wire guides being subject to spring bias pre'set at the proper UNITED STATES PATENTS value for a given wire diameter.

3,430,832 3/1969 Meyer ..226/l94 X 7 Claims, 6 Drawing Figures I w I *4 E2 I Z H l a 1| 60 t- L T J5 I 6' W I '0 Y .r ,M'm'

WIRE FEEDER BACKGROUND OF INVENTION Wire feed systems which have yieldable pressure rolls are normally so designed that the rolls move in an are about a point located outside of the center line of the drive roll. The instant device with rectilinear diametrical movement is believed to be superior in its accuracy of feed. It is independent of orientation. Normally, the direction of yield is vertically upward but the device will function inverted or in any other relative position of the parts. It functions independently of the wire supply system. That is to say, it is immaterial whether the wire comes from a spool, a coil, a reel, or a pay-ofi' pack.

SUMMARY OF INVENTION A power-driven feed roll and its bearings are mounted in a fixed position with respect to a base upon which the drive BRIEF DESCRIPTION OF DRAWINGS FIG. I is a general view of the device in front elevation, portions being broken away.

FIG. 2 is a plan view thereof.

FIG. 3 is a view taken in section on the line 33 of FIG. 1.

FIG. 4 is a view showing in perspective the separated parts of the housing and base and the intervening floating unit, portions of the latter being broken away.

FIG. 5 is a fragmentary detail view in section showing one of the spring biasing means and its seat.

FIG. 6 is a fragmentary view in section taken on the line 6- 6 of FIG. 1.

DETAILED DESCRIPTION The base 8 comprises the lower part of a housing completed by a removable upper part 10 with its top overlying the base. The base has standards 12 and 14 for which the upper part of the housing is provided with notches such as that shown at 16 in FIG. 4. The standard 12 of the base member 8 has a ball bearing 17 and the standard 14 has a sleeve bearing 18 for a drive shaft 20 upon which the knurled or toothed feed roll 22 is mounted. The motor 24 may be in direct connection with shaft 20 and may be attached externally of the housing to the standard 14.

Wire track means includes a tubular input wire guide 26 and an aligned output wire guide 28 disposed at opposite sides of feed roll 22 with their bores substantially tangential with respect to the feed roll.

The guide tubes are sized in general accordance with the wire size. At their opposite sides, the guide tubes extend close to the bite of the rolls on the wire and have their terminal portions transversely beveled or relieved at 30, 31 and at 32, 33 (FIG. 1) to receive the feed roll and a floating pressure roll 34. The latter is mounted on a shaft 36 for which bearings are provided at 38 in the ends of a floating block 40. A plurality of bolts 42, one of which is shown in FIG. 5, are threaded into the top 45 of the upper housing unit 10 and have stop means such as the split collar 44, in supporting relation to block 40. The block can move rectilinearly along the bolts 42, being biased toward the drive roll 22 by compression springs 46 for which seats are provided against the upper housing unit 10 and the floating block 40. A relatively slight movement of the floating block against the bias of springs 46 accommodates movement of the pressure roll 34 to and away from the drive roll responsive even to the most minute variations in wire size. It IS contemplated that guide tube dimensions and the bias of springs 46 and range of movement permitted the floating unit can be predetermined according to the size of the wire handled by the device at any given time.

Since the tubular guides 26 and28 are rigidly fixed in depending arms 48 and 50 belted to block 40 (FIG. 4), it will be apparent that the block 40 and the wire guides and the pressure roll 34 constitute an assembly which has floating movement as a unit subject to the bias of the springs 46. The direction of that movement is not arcuate but is rectilinear upon the common diameter of the pressure roll 34 and feed roll 22, this being an important feature of the instant invention.

The invention has particular value in welding equipment, wherein the guide tubes provide a floating wire track that maintains the weld wire substantially on center. The welding torch can be mounted on the floating unit as diagrammatically shown at 55 in FIG. 4, to maintain a fixed relation to the weld wire, thereby assuring accurate uniformity.

I claim:

1. A wire feed system which includes in combination a power-driven feed roll, and a track unit comprising a coacting pressure roll, a floating wire track unit comprising a bearing support for the pressure roll and including wire guide tubes with substantially aligned axes mounted on the floating bearing support substantially tangent to the feed roll and the pressure roll at opposite sides thereof, and means for guiding the floating wire track unit for rectilinear movement along a path substantially diametrical with respect to both rolls.

2. A wire feed system according to claim 1 in which biasing means urges one of said rolls toward the other to engage between them a wire in the guide tubes.

3. A wire feed system according to claim 1 in which the guide tubes extend into close proximity to the bite of the rolls on wire engaged thereby, the respective tubes having relieved terminal portions between the rolls.

4. A wire feed system according to claim 1 in which a base has bearing support means for the feed roll, and a complementary housing means mounted on the base carries the means for guiding the floating wire track unit.

5. A wire feed system according to claim 4 in which the means for guiding the floating unit comprises bolts on the housing means and for which the floating unit has bearing apertures, and compression spring means confined between the floating unit and the housing means.

6. In a wire feed system, in combination, a base having spaced upstanding supports, a drive shaft having bearings mounted on said supports, a motor on one of said supports and in operative connection with said shaft, a wire-feed roll on the shaft between the supports, a housing element connected with the base and including a top overlying the base, a pressure roll for holding to the feed roll the wire to be fed, a floating unit on which the pressure roll is mounted, and means guiding said unit for rectilinear movement of the pressure roll regarding the feed roll, the floating unit including wire guide tubes beveled to extend between said rolls, said tubes being substantially tangential to the feed roll and movable with said unit.

7. A wire feed system according to claim 6 in which the means guiding the floating unit comprises rods fixed in the housing top and for which the floating unit has guide bearings, and springs yieldably biasing the floating unit in a direction to urge the pressure roll toward the feed roll rectilinearly along said rods.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US3026012 *May 13, 1960Mar 20, 1962Murray G ClayWire guide for spring-coiling machines
US3430832 *Jul 21, 1967Mar 4, 1969Machinery & Welder Mfg CorpWelding wire feeding mechanism for continuous welding apparatus
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3789186 *Mar 13, 1972Jan 29, 1974Rygiol HCurrent transfer in connection with electric welding
US4039107 *Nov 12, 1975Aug 2, 1977Boley Robert ERoller entry guide having improved guide insert and roller adjustment means
US4488688 *Jul 31, 1980Dec 18, 1984Vsesojuzny Nauchno-Issledovatelsky Institut Metiznoi Promyshlennosti VniimetizCoiling apparatus for long-size products
US4629105 *Mar 15, 1984Dec 16, 1986Grenon Rene EApparatus for driving a taut rigid wire between two grooved wheels
US5584426 *Jul 24, 1995Dec 17, 1996Ziesenis; Glenn R.Welding wire holding device
US5586709 *Jul 18, 1995Dec 24, 1996M.E.P. Macchine Elettroniche Piegatrici SpaDevice to compensate the elongation of at least two wire rods or round bars, which is associated with a drawing assembly
US7208698Feb 4, 2005Apr 24, 2007Illinois Tool Works Inc.Welding gun attachment mechanism
US7238918 *Mar 1, 2005Jul 3, 2007Illinois Tool Works Inc.Welding guns with mechanical interface
US7285746Mar 1, 2005Oct 23, 2007Illinois Tool Works Inc.Welding gun inlets
US7374074 *Apr 8, 2004May 20, 2008Illinois Tool Works Inc.Wire feeder
US7389900Mar 1, 2005Jun 24, 2008Illinois Tool Works Inc.Floating wire guides
US7390989Apr 8, 2004Jun 24, 2008Illinois Tool Works Inc.Wire feeder
US7531768 *Feb 4, 2005May 12, 2009Illinois Tool Works Inc.Wire feeder pinch force mechanism
US7615723Mar 1, 2005Nov 10, 2009Illinois Tool Works Inc.Drive roll release mechanism
WO1990000951A1 *Jul 27, 1989Feb 8, 1990Perkin Elmer CorpWire gun
WO2012082786A1 *Dec 13, 2011Jun 21, 2012Illinois Tool Works Inc.Welding wire feeder with pushbutton wire guide holder and alignment tongue method using a welding wire feeder having such alignment tongue
Classifications
U.S. Classification226/187, 226/194, 226/181
International ClassificationB23K9/133
Cooperative ClassificationB23K9/1336
European ClassificationB23K9/133D