US1843240A - Spring coiling machine - Google Patents

Description

Feb; 2; 1932. D.T.OWEN

SPRING COILING MACHINE:

Filed Sept. 1.3, 1928 TIE-.1... :3 5

4 Sheets-Sheet l SEMI:

ATTORNEY Feb. 2, 1932, D. T. OWEN SPRING COILING MACHINE 4 Sheets-Sheet 2 INVENTOR Filed Sept. 13, 1928 an var. r- 0 5 ATTORNEY Fe, 2, m2. D. T. OWEN 1,843,24G

SPRING COILING MACHINE Filed Sept. is, 1928 4 Sheets-Sheet 5 Ira. 6.

ATTORNEY Patented Feb. 2, 159 32 Y DAVID 'r. ownlmon CLEVELAND HEIGHTS. 01110, Assrcnon TO THE OWEN AUTOMATIC srnme MACHINERY COMPANY, or CLEVELAND, ()HIO, aconrona'rron or OHIO SPRING COILING MACHINE A plication filed. September 13, 1928. Serial No. 305,620.

The present invention relates to spring coiling machines, and the object of the invention is to provide a machine which will feed spring wire in a positive manner uniform distances and produce coil springs of uniform .size and length. The machine is further designed to produce-coil springs of uniform size regardless of the gauge of Wire employed and 1 machine on a reduced scale, and Fig. 2 a

side elevation. thereof. Fig 3 is a frontview of the machine, and Fig. 4 a rear view thereof partly in section on line 44, of Fig. 1. F 5 is a vertical section on line 55 of Fig. 1, and Fig. 6 a section on line 6-6 of Fig. 1. Fig. 7 is a horizontal section on line 77 of Fig. 4. Fig. 8 is a vertical section on line 8--8 of Fig. 1. ig. 9 is a rear view corresponding t1) ,Fig. 4, showing thespeed change gearing in a different working position.

The machine comprises a base or main frame 2 having spaced uprights or standards 33' containing or carrying suitable bearings for several rotatable shafts lying in different planes and extending on parallel lines lengthwise of'the machine. Thus, a main power shaft 4 is provided which may be driven by a sprocket wheel 5 or any other suitable power transmitting member. A pinion 6 fixed to this main shaft meshes with a large gear 7 supported to rotate freely upon a countershaft 8,'and two additional gears 9 and 10 of different diameter are bolted or fastened to a large gear 7 so that all three gears rotate together,thereby communicating power with decreasing speed to other gearbe driven intermittently at three different termittently by a train of gears which include a set of mutilated interlocking gears. Thus gear 10 on countershaft 8 is av mutilated gear (see Figs; 6 and 8) meshin'gwith a smaller mutilated gear 11 sleeved on'a second shaft 12 located above and parallel with countershaft 8 and the gearing is of the self-locking type, i.;e., the driven gear 11 is locked against movement by the driving gear 10 during a part of the revolution of the latter. Joined to small gear 11 is a spur gear 14 which opcrates an' idler gear 15 mounted within and carried by a swinging or oscillatory housing 16 at the rear of the machine. This housing has a hub 17 sleeved rotatably upon the rear wardlyrextending end portion 18 of upper shaftl2, and in swinging the housing the idler gear 15 has a planetary travel in respect to spur gear 14. Gear 15 is held-in constant" mesh with a pinion 19 mounted at the inner end of a short shaft 20 carried by suitable bearings 21 within the swinging housing,

' change gears 26, 27, and 28, respectively, on

countershaft 8, see Fig. The changeable gearing. described permits countershaft 8 to o speeds, thereby effecting .a corresponding change in the rotatable movements of a pair .of grooved wire feeding wheels 29 and 30,

respectively, on shafts Sand 12. The wire W from which the coiled springs are made 9 is fed through a guiding tube 31 into and between the bite of thextwo feed wheels 29 and 30. These wheels are removably secured. to the outer ends of shafts 8 and 12, and may. be readily exchanged for other wheels. grooved to accommodate wires of different gauge. Upper shaft 12 carrying wheel 30 is also shiftable within limits in a vertical plane to permit a clamping pressure to be applied to the wire, usinga set screw 31' at 1 the top standard 3 to press downwardly against a movable box 32 within which shaft 12 has rotatable bearing. Shaft 12 is rotated at the same speed as countershaft 8 by and through a set' ofconnecting gears 33 and 34, respectively, and wire W is fed forwardly with considerable force against a pair of grooved bending rollers 35, including a rolle-r 36 carried upon an oscillatory arm 37 on a rock shaft 38. The diameter of each circular coil of the spring is determined by the position of roller 36.

Assuming a'coiled spring ofhour glass shape is to be made the roller is oscillated slowly while Wire W is-being fed thereto.

Thus an arm 39 on rock shaft '38 carries an adjustable bar 40 which extends over the free end of a pivoted lever 41' resting normally opposite a rotatable cam 42, see Fig. 5. 'A set screw 43 011 lever 41 supports the lever in a predetermined working position opposite the cam, and a set screw 44 extending downwardly from bar 40 engages the lift end of lever 41. Rotation of cam 42 is of fected by a gear 45 meshing with the constantly rotating gear 9 on countershaft 8, see

Figs. 1 and 5, so that a series of circular.

coils of different diameters are produced while the wire feeding wheels are revolving.

The number of revolutions to be given to the wire feeding wheels to feed the wire afgiven distance is determined inthe beginning by setting the speed change gearing. Thereafter, the wire is fed exactly the same distance for each spring and no slippage or misfeeding occurs because the feeding wheels are constantly in pressure engagement with the Wire'and never released therefrom. As the spring is being formed a presser device 46 engages a circular part of the coil being made and gives it the required pitch or slant usually present in such springs. When feeding of the wire stops, the wire is severed by a cutter. The means for operating the cutting plunger 47' includes a cam 48 on one face of gear 7 and themechanism for-producing a given pitch to each coil includes a rotatable cam 49 centrally of gear 7 opposite a link 50 which is pivotally secured at one end to an adjustable screw 51 and attached at its opposite end to a spring-pressed rod 52 carrying presser device 46. The spring forming rollers, and the cutting and pitch-producing mechanism referred to is oldand well known and therefore needs no further ex-' planation, and furthermore the same are disclaimed by me. However in using machines of this type in combination with a machine for clippingcoiled springs together in rows,

I experienced such great difficulty in producing coiled springs of uniform length successively that I devised the present machine to feed the wire intermittently without release or slippage exactly the same distances for each springmade and also to cut the wire .and intermittently positively locking said to the same length so that the out extremities of the end coils of each spring would be definitely related according to a given need for clipping them together'in a row in the second machine. The present machine was further designed to meet the additional problem of making coiled sprin s uniformly in different sizes, all as hereinbefore more fully set forth.

What I claim, is: I 1. A spring coiling machine, comprising a set of wire bending rollers, and a pair of 7 wire feeding wheels, including means for maintaining a constant feeding pressure on the Wire, and means for rotating said wheels wheels against rotation.

2. A spring coilingmachine, comprising a pair of wheels for feeding wire, means for holding said wheels in constant pressure.con-.

tact with the wire, means for rotating said 35 severing the wire at uniformly successive intervals during inactive periods of rotation of said wire feeding wheels. 4

3. A-spring coilingv machine, including means for feeding spring wire intermittent ly uniform distances at uniform speed, rollers for coiling the wire as it is fed thereto by said feeding means, intermittently-operating means for severing the wire adjacent the coiling rollers, and an adjustable pressure device holding said feeding means in' constant gripping contact with the wire. 4. A spring coiling machine, including a pair of rotatable shafts carrying wire feeding wheels, a pressure device for one shaft holding said wheels in constant feeding engagement with the wire and intermittent self-locking gearing for rotating said' shafts and wheels.

5 A springcoiling machine, includinga pair of shafts geared to rotate at unifdrm speed, wire feeding wheels on said shafts, means for applying pressure through the wheels to the wire, a continuously revolving mutilated gear sleeved on one shaft, a second mutilated gear sleeve on the second shaft in mesh with the first mutilated gear, and a set of changeable speed gears connected with said second gear and the first shaft. In testimony whereof I aflix my signature.

DAVID T. OWEN.

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