US390636A - Method of pointing articles of wire - Google Patents

Description

(No Model.)

H. A. WILLIAMS.

METHOD OF POINTING ARTICLES 0F WIRE. I No. 390,636. Patented Oct. 2, 1888.

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UNITED STATES PATENT OFFICE.

HENRY ALEXIS WILLIAMS, OF TAUNTON, MASSACHUSETTS.

METHOD OF PO INTING ARTICLES OF WIRE.

SPECIFICATION forming part of Letters Patent No. 390,636, dated October 2, 1888.

Application filed June 14,1888. Serial No. 277,094. (No model.)

To aZZ whom, it may concern:

Be it known that I, HENRY ALEXIS WIL- LIAMS, a citizen of the United States, residing at Taunton, in the county of Bristol and State of Massachusetts, have invented certain new and useful Improvements in theMethod of Making Pointed Wire Articles by Cold Rolling; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

My invention consists of an improved method of rolling taper points by gradual reduction through successive operations of a series of rolls, or a series of passes or grooves in the same pair of rolls, which, beginning at the base of the taper successively extend the taper therefrom and reduce the yet untapered portion in advance of the taper in such manner that the compressing or condensing effect of the rolls on the metal is increased toward the point proportionately as the operations are repeated to produce points of superior density, hardness, and strength, and to provide apracticable way of producing fine taper points by coldrolling them, as hereinafter fully described, reference being made to the accompanying drawings, in which- Figure 1 is a transverse section of a pair of rolls contrived according to my invention, and showing the position for the beginning of the first operation. Fig. 2 is a section of a similar pair of rolls, showing the blank in the process of'the second operation. Figs. 3 and 4 are similar views illustrating the progress of the work to the completion of the taper. Fig. 5 is a diagram showing the blank as it appears after each operation in a process of four stages; and Fig. 6 is a plan view of part of a machine, such as is contemplated for carrying out the process by the use of mechanical holders for the blanks that may be shifted along from one pair of rolls or from one pass to another, successively.

Referring to Fig. 5, the blank a is repre sented at 1 as having been subjected to one operation producing a short taper section I), and a reduced cylindrical portion, 0, extend ing from the smaller end of the taper section to the end of the blank.

At 2 the blank is represented as having passed through the second operation,and being extended in the taper portion 1), and still further and correspondingly reduced in the cylindrical portion 0, and at 3 and 4 the blank illustrates the continued progressive opera- 6o tions resulting in the completion of the taper point in a process of four steps or stages. It is obvious that the number of steps or operations in the process may be varied, as desired; for more gradual reduction a greater number 6 may be employed, which is desirable for high quality in product. The first groove or pass of the series (indicated in Fig. 1) has a taper section, (I, next following the gap 6 for admitting the blank, corresponding to and produc- 7Q ing the taper section b, and a succeeding concentric section, f, in which cylindrical part c of the blank is produced. The next pass, Fig.

2, has a taper, d, double the length of the same part in Fig. 1. and producing taper b twice 7 the length of taper b, and it also has a succeeding cylindrical section,f, producing cylindrical part c as much smaller than c as the taper b" is reduced from b, and so on through the series of grooves or passes to the last,which so completes the taper to the point or so nearly thereto as is practicable-say toa sixty-fourth of an inch in diameter or thereabout. If finer points are required, they may be finished by grinding.

The blank is to be inserted between the rolls through the gap 0 to the same extent each time, and the taper sections cl of the passes preferably begin to take effect at the base of the taper on the blank successively for smoothing 0 and still further but slightly condensing the same in advance of the farther taper produced in each pass; but they may of course begin anywhere along the previously-tapered part, so that the continuation of the taper proceeds 93 in regular succession.

It will be seen that the second taper section is condensed more than thefirst by the effect of the cylindrical reduction in the first pass in addition to its taper reduction in the second pass, and so on, each successive taper section being condensed more than those preceding, so that pointed articles made by this process increase in density, hardness, and strength toward the point where most needed. In practice the passes will preferably be graduated for proportionately smaller reductions as the metal becomes harder, and thus the quality of the material will be enhanced.

While all the passes or any number of them may be made in a pair of rolls, it will be preferred to provide a separate pair for each pass, because the size of rolls required for several passes would be larger than is desirable, for certain reasons, one of which is that the surface speed would be too great for rotation in a given time.

The blanks may be presented to the rolls by hand; but it is preferred to employ a mandrel, h, having a chuck consisting of grip-jaws '11, with a collar, j, sliding on the jaws, which are suitably tapered to be tightened and slack ened on the blank according as the collar is shifted along them, the mandrel being mounted in the checks 7.: ofa slide, Z, so that it can slide forward and backward in said cheeks, with a spring, m, to thrust the blank forward into the gaps of the roll grooves or passes, from which it is ejected by the action of the rolls, the operation being several times repeated in each pass. The slide Z shifts toward and from the rolls on the bed-plate n, to advance the mandrel to the position for enabling the blank to be inserted and for withdrawing it when it is to be shifted along to another pass, and the bed-platen is mounted on ways 0, along which the mandrel may be transferred from one to another of the passes or pairs of rolls, all in line.

In practice the mandrel will be rotated as it shifts along from pass to pass or roll to roll by a toothed raek,p, with which it may gear by a pinion under the bearing q of bed a, through which the mandrel also works; or the mandrel may be turned by hand, the purpose being to change the blank in the rolls so that the fins made by one operation will be rolled down on the next. The apparatus for handling the blanks may be varied at will and is not claimed herein.

The improvements in rolls for carrying out this improved method of cold-rolling tapers and the automatic feeding apparatus for handling the blanks are claimed by me in an application for a patent now pending, Serial No. 253,395.

What I elai In, and desire to secure by Letters Patent, is-

The method of gradually producing taper points by rolling a short section of the taper beginning at the base with a cylindrical continuation from, the taper to the end, and successively rolling longer taper portions with correspondingly-redueed cylindrical portions, and thereby completing the taper points, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

HENRY ALEXIS WILLIAMS.

Witnesses:

ELISIIA T. JACKSON, W. J. MORGAN.

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