US1236470A - Method of making copper and similar bands. - Google Patents

Description

G. E. NEUBERTH.

METHOD OF MAKING COPPER AND SIMILAR BANDS;

APPLICATION FILED JUNE 22,1916.

Patented Aug. 14, 1917.

/0 WA/AIHBHHII llll ing of time possible.

GEORGE E. NEUBEBiTH, OF NEWARK, NEW JERSEY.

METHOD OF G COPPER AND SIMILAR BANDS.

Specification of Letters Patent.

Patented Aug. 14, 1917.

Application filed June 22, 1916. Serial No. 105,209.

To all whom it may concern:

Be it known that I, GEORGE E. NEUBERTH, a citizen of the United States, and a resident of Newark, county of Essex, and State of New Jersey, have invented certain new and useful Improvements in Methods of Making Copper and Similar Bands, of which the following is a specification.

This invention relates to an improved method of making metal bands, being particularly adapted to the manufacture of bands of ductile metal, such as copper, such bands being used on projectiles, whereby a tight fit in the rifling of the barrel of the ordnance is insured.

The invention consists in the manipulation of a ring or flat washer of copper or other suitable metal, such manipulation eliminating operations at present expensive and thus reducing the cost of production to a very great extent.

Furthermore, the manufacture of the bands, the character of the different operations making this sav- The number of bands made within a given time under this method is much larger than under old methods with the same number of operatives.

This method also simplifies the work of making a band, the operations being quick of accomplishment and furthermore turping out bands in which the metal is well compacted, and firm and solid throughout. The process of making the bands is illustrated in the accompanying drawings, the steps being illustrated in connection with such parts of machines as are necessary to clearly show the manipulation of the metal.

In said drawing, Figure l is a face'view of a blank which is provided and from which the band is adapted to be made. Fig. 2 is a section on line 2, 2, in Fig. 1. Fig. 3 is a view similar to Fig. 1 and illustrating the blank after it has been treated in a manner to alter its shape to permit its being forced into its band shape. Fig. 4 is a section on line 4, l, in F ig, 3. Fig. 5 is a View illustrating, in a diagrammatic way, the step to which the blank shown in Figs. 3 and 4 is subjected. Fig. 6 is a view of the band after it is handled as shown in Fig. 5. Fig. 7 is an enlarged view showing a crosssectional part of the band of Fig. 6 and illustrating several inequalities that are apt to occur in bands of material thickness, and Figs. 8, 9 and 10 are views showing succesthere is a saving of time in sive steps to which the band in Fig. 7 can be I throughout so that a cross section, as at 11 in Fig. 2, has substantially straight sides and, as above mentioned, is of the same thickness throughout. The blank is next subjected to suitable rolling or any similar step that will transform it into the tapered washer shown in Figs. 3 and 4. In this rolling or other similar process the blank is formed so that it is thicker at its inner diameter 12 than it is at its outer diameter 13, this operation usually resulting in an enlargement of the inside and outside diameters of the washer or ring. To clearly set this out Fig. 3 shows in dotted line the dimensions of the washer 10 shown in Fig, l, and in full lines the washer at the approximate diameters present after the blank has been rolled. Between the aforementioned steps and also between the succeeding steps, which are to be hereinafter described, it is preferable to subject the article being treated to an annealing process between such steps so as to make the working of it easier. The washer as shown in Fig. 3 is. then upset so as to form it into a band, one method of doing this upsetting being illustrated in Fig. 5, the washer l0 resting on a die 14: and being engaged by a plunger 15, the plunger 15 and the opening in the die 14 being proportioned so that they squeeze the washer down through the opening in the die, and the result is the band 16. The thickened inner edge 12 of the Washer 10 when swung outward in the upsetting process, and the, thinner outer edges when swung inward in the upsetting process, are sub j ected to strains that cause a readjustment of the particles of the copper in the washer so that the band 16 is of substantially the same diameter throughout and its width is approximately equal to the distance between the inner and outer diameters of the washer 10 shown in Fig. 3. For small bands, such upsetting process is sufficient and it is also sufiicient in larger bands where a particular I size is not essential, but where a certain fit is desired or for other reasons if the band is to be made to a particular size, it is subjected to further steps to be hereinafter described. When a band is of considerable thickness relative to its diameter, the upset ting process shown in Fig. 5 and the resultant band shown in Fig. 6 are not sufficient to make a band accurate enough for some uses. A part of such band is shown in Fig. 7, the inequalities being slightly exaggerated, the band having its central portion slightly bulgedas at 17, and its top and bottom edges are usually slightly uneven as at 18 and 19. I then subject the band shown in Fig. 7 to an operation, preferably of stamping or pressing, so that its edges are straightened and brought substantially in line parallel to one another;

In Fig. 8 there is illustrated the edge truing die 20 and plunger 21 which are prefer ably used to straighten and aline the edges of the band 16, which receives an extension 22 on the plunger 21 and has its upper edge abutting against the shoulder 23 while the lower edge is'rested upon a corresponding annular shoulder 2a, and the die 20 having an opening of proper size to receive the extension 22 of the plunger 21. As the shoulders 23 and 24 are parallel and evenly spaced, the apparatus such as shown in Fig. 8 flattens out the edges of the ring and alines them up in substantial parallelism. 7 After alining the material adjacent to the edges, the edges themselves are preferably rolled as by means of suitable rollers 26 or by similar mechanism so that the edges 27 are straight, this rolling usually being desirable to finish the edges, and eliminating lathe work and similar expensive and time consuming processes that are now necessary in the manufacture of such bands.

Bands which do not come through the die of Fig. 5 with sufficiently true and uniform diameter and straightness of wall may be forced through a finishing die, such as 28, Fig. 10, by a plunger as 29 having a shoulder 30 against which the upper edge of the ring abuts. This straightens out any bulged parts as 17 and assures a ring of uniform diameter, thickness and straightness of walls.

The manipulation of the washer and of the band is calculated, in its different steps, to so force and adjust the material in the band that the resultant product is firm throughout, has no holes or similar hollow I a A a a, openings or lnequallt es 1n 1t, and is thoroughly solid and homogeneous throughout.

The process herein described requires but a short time to make a finished band, so that a greatly increased number of bands may be manufactured within a given space of time; it also cheapens the cost of producing these bands, at the same time gives a better prodnot than is possible by the old methods of making bands, and which will stand up under very severe tests, it being exceptional and unusual for bands made in accordance with my invention to be rejected or discarded even when subjected to the severest inspections and tests.

My improved process may be carried out by any suitable apparatus and I am not to be limited by the precise form of apparatus shown, but my invention is as broad as my claims. a V

Having thus described my invention, I claim: V V

1. The method of making metallic bands consisting in providing a washer-shaped ring of material thickness, said ring being thinner at its outer diameter than at its inner diameter, upsetting said ring to form a substantially cylindrical band of substantially the same thickness throughout, straightening and rolling the edges of said band and then truing and straightening the walls of the band by compressing the band.

2. The method of making metallic bands consisting in providing awasher-shaped ring of material thickness thicker at its inner edge than at its outer edge, upsetting said ring to form a band of substantially the same thickness throughout, pressing said band on the edges to straighten said edges and make them parallel, pressing the faces of the band adjacent to one edge, and then pressing on the inner and outer faces of the band to true and straighten the walls.

3. The process of making bands of ductile metal to accurate gage consisting in providing a washer of substantial. thickness, up setting the washer to form a band, and then compressing the band parallel with its axis and also radially and then rolling the edges of theband whereby it is unnecessary to remove any of the metal. y

In testimony that I claim the foregoing, I hereto set my hand, this 21st day of June,

GEORGE E. NEUBERTH.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G.

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