US1889893A - Gauge-recording device for wire-drawing machines - Google Patents

Description

J. GURNE Dec. 6, 1932.

GAUGE RECORDING DEVICE FOR WIRE DRAWING MACHINES Filed March 13, 1931 5 0 1L d O "W. J I W/\r ii 1 t f W3. Q a

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GAUGE-RECORDING DEVICE FOR WIRE-DRAWING nonnrss Application fled luck 18. 1081, Serial 10. 582,408, and in France larch 80, 1830.

The present invention relates to a gaugerecording device for wire-drawing machines and has for its primary object to rovide a device which will accurately record or register minute inequalities in the diameter,

gauge, roundness or hardness of the wire.

A further object of the invention is to rovide a device of this character capable 0 recording or indicating in a hi hly legible way 1 minute inequalities in the iameter, gauge,

roundness or hardness of the wire, the indication furnished by this device being in the form of a line traced on a sheet of paper or similar recording material and giving a vivid illustration of the inequalities in question which makes it possible to readily locate those lengths or portions of the drawn wire presenting said inequalities. The ability to locate these unequal portions of the wire and throw them away at will is valuable for many pur oses such for example as the making of car clothing wires.

A still further ob'ect of the invention is to provide a device 0 the aforesaid character associated with the die of a wire-drawing machine for recording in a magnified way minute inequalities in the diameter, gauge, roundness or hardness of the wire, said inequalities bein of the order of one hundredth of a mil imeter, thus making it possible to discard those ortions of the wire which suffer from sai inequalities to put on the market a perfectly gauged wire.

Still a further object of the invention is to provide a device of the character set forth of simple and rugged construction involving springs adapted to elastically sustain the tractional stresses undergone by the die through which the Wire is drawn, thereby 0 avoiding any jerks due to the varying resistance offered b said wire.

With these an such other objects in view as will incidentally appear hereafter, the invention comprises the novel combination and arrangement of parts that will now be described in detail, reference being had to the accompanying dlagrammatic drawing which shows non-l1m1tatively one, of the various mechanlcal forms in which the principle of the invention may beemployed.

In the drawing:

Figure 1 is a fragmentary top plan view showing the wire-drawing machine comprisingthe elastically held die through which the wire is drawn and the gauge-recording device associated with said die.

Figure 2 shows on an enlarged scale the record line illustrating the evenness of a wire drawn in a machine like the one shown in Fig. 1. 7

Figures 3, 4 and 5 are representations similar to Fig. 2 but assuming the wire that has been drawn to shown certain inequalities that are registered and magnified in a highly legible and striking way by each record line.

Reference being first had to Fig. 1, a designates the wire, I) the drum on which said wire is wound after being drawn, a an arrow showing the direction in which the wire travels under traction from a conventional feedin source (not shown) towards said drum, 5 the die through which the wire is drawn, the gau e of the die opening being reckoned according to practical requirements.

The die dis elastically connected to the stationary bracket 0 through a pair of coil springs f, f of suitable length and resiliency and high responsiveness or sensitiveness to inequalities of traction for allowing proper longitudinal displacements of the die d as will be stated hereafter. The springs, f, f are secured at i, i on the bracket 6 and at j, j on the die holder Z. Intermediate said springs may be located in the usual way a cup (not shown) containing lubricant through which the wire a passes.

Opposite the die holder Z but laterally thereof is positioned a drum m to which is imparted in any convenient way a uniform rotational motion. For example, this drum m may be supported by an arbor a to which is keyed a gear t meshing wlth a gear u keyed to an arbor 'v driven by an actuating mechanism W of any approved nature, such as for example a clockwork mechanism or an electric motor the actuation of which may be synchronlzed with the actuation of the wire drawin machine itself, and will cause stoppage 0 the drum m when said machine is stopped. The drum m is fitted with a sheet of paper or equivalent writing or recording surface. A stylus a secured to the dle holder Z is so associated with the recording drum m as to have its end or nib constantly contacting therewith during the wire drawing operation. v

The operation of the gauge-recording device is as follows: Assuming the wire a that is being drawn to have such a texture or cross sectional outline throughout its len th as to always offer the same resistance to t e die (Z, the tensile elongation of the coil sprlngs f, f holding the die holder Z with respect to the supporting bracket 6 will be constant, whereby the stylus o rigidly connected to said die holder will trace on the paper or other cover ing of the rotary recording drum 1) a rectilinear line p such as the one shown in Flg. 2.

Should now a single inequality in the hardness, roundness, gauge or other characteristic of the wire a that is being drawn meet the die, d, the tensile elongation of the coil springs f, f will at once vary, the length of said springs decreasing or increasing depending on the inequality in question involving less or more resistance to the drawing operation. The stylus 0 will therefore write. i. e. register said inequality of resistance in an 11- lustrative way on the covering of the recording drum m as shown for example at gun Fig. 3. The shape ofthe tooth, notch or n1ck 9 thus produced on the straight record line p will give a true illustration of the extent of the inequality of the wire by which it will be possible to readily locate and discard the faulty or defective portion of the wire a, for example by immediately stopping the machine and eliminating said portion.

Similarly, a series or sequence of inequalities in the wire a that is being drawn will produce an irregular line showing a succession of peaks such as the ones shown at r in Figures 4 and 5.

It will thus be seen that the invention provides a highly sensitive gauge-recording device for wire-drawing machines which by a proper selection of the tensional characteristics of the springs f, f will give a true and very legible illustration of any minute inequality in hardness, roundness or cross sectional area liable to occur in a wire in the course of drawing even in the case of extremely thin wires or filaments such as calibrated wires, wires used for the making of card clothing or wires necessitating a subsequent annealmg. i

As above stated, the responsiveness and accuracy of the device permits the disclosure of inequalities in the diameter of the wire down to one hundredth of a millimeter. This result has never been attained by previously proposed devices which were much more complicated. The attainment of this novel result in the present device must be ascribed to the gauge, diameter, roundness or hardness of the wire submitted to the drawing operation and comprising stretchable spring means connecting the die holder to a stationary part of the machine, said spring means being so arranged as to undergo elongation by the drawing of the wire and being highly responsive and sensitive to the varyin resistance offered by the die to the passing of the wire therethrough, a recording element directly associated with the die holder, and a member having a recording surface associated with the recordin element, said member being movable uni ormly throughout the drawing operation, and means for effecting such movement.

2. In combination with a wire-drawing machine having a die holder movable in a direction in which the wire is fed and in the reverse direction and a die carried by said die holder, a device for automatically record ing any minute inequality in the gauge, diameter, roundness or hardness of the wire submitted to the drawing operation and comprising stretchable coil springs connecting the die holder to a stationary part of the machine, said springs being so arranged as to be submitted to elongation by the drawing of the wire and being of a character highly responsive and sensitive to the varying resistan'ce offered by the die to the passing of the wire therethrough, a recording stylus rigidly fastened to the die holder, and a rotatable member having a recording surface associated with the stylus, said member being rotatable uniformly throughout the drawing operation, and means for rotating said member.

3. In combination with a wire-drawing machine having a die holder movable in a direction in which the wire is fed and in the reverse direction and a die carried by said die holder, adevice for automatically recording any minute inequality in the gauge, diameter, roundness or hardness of the Wire submitted to the drawing operation and comprising stretchable coil springs connecting the die holder to a stationary part of the machine,

said s rin be so arranged as to be submittetf to fiiongt lon by the drawing of the wire and being of a character highly responsive and sensitive to the va ing resistance offered by the die to the passing of the wire therethrough, a recording stylus rigidl fastened to the die holder and rojectmg eterally thereof, and a rotatab e drum covered with a recording surface associated with the stylus, said drum being rotatable uniformly throughout the drawing operation, and means for rotating said drum.

In testimony whereof I aflix my signature.

JEAN GURNE.

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