US1464929A - Method of rolling plate and like metal and blank therefor - Google Patents

Description

Au 14, 1923. v 1 RA-64.92% B. GOLDSMITH METHOD OF ROLLING PLATE AND LIKE METAL AND BLANK THEREFOR Filed May 51. 1921 K OLD FORM 1 Fin. 2.

OLD FORM WITNESSESS INVENTOR WQJZM. W;

ATTORNEYS Patented Aug. 14, 1923.

UNITED STATES l nen rrica.

BERTHOLD GOLDSMITH, 0F LISBON, OHIO, ASSIGNOR TO THE NATIONAL BRASS &' COPPER COMPANY, OF LISBON, OHIO, A CORPORATION OF OHIO.

METHOD OF ROLLING PLATE AND LIKE METAL AND BLANK THEREFOR.

Application filed May 31,

To all whom it may concern Be it known that I, BERTHOLD GOLDSMITH, a citizen of the pnited States, and a resident of Lisbon in the county of Golumbiana and State of Ohio, have invented a new and useful Improvement in Methods of Rolling Plate and like Metal and Blank Therefor, of which the following is a'specification.

This invention relates to a method of producing plate, sheet, strip, and coil metal, and particularly from the non-ferrous metals, and to a blank therefor.

The object is to provide a method for producing products of the kind abovedefined, withaminimum amount of scrap loss due to the irregular non-rectilinear edges of the plate, sheet, or strip.

According to existing methods of producing plate, sheet, strip, and coil metal, a bloom, slab, ingot, bar, or billet, or other blank of rectilinear form, that is to say with square ends and parallel side edges, is suitably heated and then rolled repeatedly, until reduced to the desired gage. In the rolling of such blanks, particularly of non-ferrous metals, the plate, sheet, or strip produced thereby is materially distorted at its sides and ends, which makes it necessary to trim oil and reject a considerable amount of metal in order to produce a commercial product having square ends and parallel sides.

According to the present invention the method of producing such metal is modified so as to reduce to a minimum the amount of metal which must be trimmed off and rejected.

In the accompanying drawing, Fig. 1 is a plan view of a typical blank made according to existing methods of producing metals of the kind specified; Fig. 2 is a plan view of the same when rolled out; Fig. 3 is a plan view of the form of blank according to the new method; and Fig. 4 is a plan view of the same when rolled out.

According to the present methods of producing plate, sheet, strip, and coil metal, particularly with non-ferrous metal, a blank is produced such as shown in Fig. 1, that is to say a blank of rectilinear design, having square ends 1 and parallel sides 2, as shown. One end may be tapered slightly to facilitate entering the rolls in the roughing pass. This blank is suitably heated and then is rolled, a number of times, until reduced to the de- 1921. Serial N0. 473,749.

sired gage. The rolling distorts the blank causlng the ends to bulge out more or less irregularly, and causing the finished plate, sheet, strip, or coil metal to be widest at its ends 1 and narrowest intermediate its ends. As a consequence material amounts of metal must be trimmed of]? and rejected, in order to produce a commercial product with square ends and parallel sides.

According to the present invention the blank is formed suitably varying in shape from a rectilinear design so that when heated and rolled in the ordinary manner the distortion produced by the repeated rolling causes the non-rectilinear blank to assume a final shape having approximately square ends and parallel sides. A suitable form of blank for this purpose is shown in Fig. 3, the same having indented or concave ends 3, and bulged out or convexside edges 4. When such a blank is heated and rolled repeatedly, the ends 3 assume a substantially square outline, and the edges 4* assume substantially straight and parallel sides, as shown in Fig. 4. Consequently the plate, sheet, strip, or coil metal can be converted to a commercial product having parallel sides and square ends, with a minimum amount of metal to be trimmed ofi, thus resulting in a very considerable saving.

The amount of distortion of the blank from the rectilinear form will vary with the kind of metal, and the amount-0f reduction to be given to it. The larger the number of passes the greater generally is the distortion in rolling, and consequently for producing very thin products, requiring a large number of passes or a large amount of reduction, the blank will be given an initial dis. tortion from rectilinear to a greater extent than where a smaller number of passes or a lesser amount of reduction is required to roll down to gage.

The blank can obviously be of any size and thickness. depending upon the product to be produced, and can be formed in any suitable way. and in the case of non-ferrous metals may be conveniently formed by casting. thereby producing a blank having the required amount of distortion. without loss of metal.

The method described adds nothin to the cost of producing the metal and e cots a Very material saving in scrap. as will be obvious.

I claim:

1. The method of producing plate, sheet, strip or coil metal with a minimum scrap loss, consisting in forming a blank having convex or bulged side edges, heating said blank, and reducing it by rolling, whereby the distortion produced in rolling causes the non-rectilinear blank to approach a substantially rectilinear shape. t

2. The method of producing plate, sheet, strip or coil metal with a minimumscrap loss, consisting in forming a blank with concave ends and convex or bulged side edges, heating said blank, and rolling the said blank repeatedly to form it into a plate, sheet, strip or coil metal with substantially square ends and substantially parallel sides.

3. A blank for rolling into plate, sheet. strip or coil metal, said blank having convex or bulged side edges, whereby when rolled it assumes a form which approximates square ends and parallel sides.

4. A blank for rolling into plate, sheet, strip or coil metal, provided with concave ends and convex or bulging side edges, whereby when the same is rolled the ends become substantially square and the side edges become substantially parallel.

5. The method of producing plate, sheet, strip or coil metal with a minimum scrap loss, consisting in forming a blank with concave ends, heating said blank and rolling it repeatedly to form it into a plate, sheet, strip or coil metal with substantially square ends and parallel sides.

'6. A blank for rolling into plate, sheet, strip or coil metal, provided with concave ends, whereby when the same is rolled the ends become substantially square.

In testimony whereof, sign my name.

BERTHOLD GOLDSMITH.

Witnesses:

J. L. GOLDSMITH, W. GOLDSMITH.

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