US594960A

US594960A - mcausland

Info

Publication number: US594960A
Authority: US
Publication date: 1897-12-07
Anticipated expiration: 1914-12-07

Description

MTNESSEE (No Model.) 2 Sheets-Sheet 1..

W. MCAUSLAND. DEVICE ECE CTAMEINC CE SEAPINC METALLIC ARTICLES.

l190,594,960l Patented DeC.7, 1897.

(No Model.) 2 sheets-sheen 2.

W MoAU ND. DEVICE EOE STAMPING 0E SE G METALLIC ARTICLES... No. 594,960. Patented Deo. 7', 1897.-

I 51111." "I Q 1 5,

UNITED STATES PATENT OEETCE.

VILLIAM MCAUSLAND, OF TAUNTON, MASSACHUSETTS, ASSIGNOR TO THE REED & BARTON CORPORATION, OF SAME PLACE.

DEVICE FOR STAM PING OR 'SHAPING METALLIC ARTICLES.

SPECIFICATION forming part of Letters Patent No. 594,960, dated December 7, 1897.

Application filed April 30, 1897.

To a/ZZ whom it may concern:

' Be it known that I, WILLIAM MO AUSLAND, a citizen of the United States, residing at Taunton, in the county of Bristol and Oommonwealth of Massachusetts, have invented a new and useful Improvement in Devices for Stamping or Shaping Metallic Articles, of which the following is a full specification.

My invention relates to the manufacture of hollow metallic articles which are stamped or formed up from sheet metal; and it consists in a new and improved device hereinafter described in detail whereby the result is accomplished in a cheap and expeditious manner.

Heretofore in the manufacture of hollow articles from sheet metal the result has been accomplished only after subjecting the blank to a number of operations, each operation or course bringing the article a little nearer to the form desired. Each of these courses requires a piece A and piece B, and each course requires one or more blows, one to form the blank and the others to smooth the ange of the blank, which is crimped 'or puckered by the first blow. It has been also necessary to anneal the blank after each course. It will be seenv that when the article formed has any depth the processis a laborious and expensive one. With my device it is possible to form up an article with but one piece A, as hereinafter described.

Referring to the accompanying drawings, Figure l shows in vertical section my device with the blank held in the piece A before being struck the first blow. Fig. 2 shows the same parts after the first blow has been struck and the piece B withdrawn. Fig. 3 shows the blank in the piece A before being struck the second time, and also the piece B2, all in vertical section. Fig. 4 shows the same parts as Fig. 3 after the second blowhas been struck. Fig. 5 is a perspective view of piece E. Fig. 6 is a perspective View of piece C, which I preferably makewith its center to conform in shape to the pieceto be produced. Fig. 7 is a vertical section of piece E. Fig. 8 is the same as Fig. 1 except that another method of securing together the pieces A and C is shown.

In the drawings the piece A is suitably held on the bed of a drop or other press. The pieces B and B2, which are respectively for block- Ythe sides.

serai No. 634,620. (No more.)

ing and finishing, are suitably attached to the piece B of the press. v

The pieces B and B2 are preferably mad of soft metal suitably shaped to the piece A. The piece B fits the die only at and nearthe bottom, leaving considerable space around The finishing-piece B2 is made to t the face and cavity of the piece A accurately, as shown in Fig. 4, so that anything placed in the piece A will be forced into every part of it.

The blank S is held in position on the piece A by the piece C. (Shown in Figs. l and 6.) This is held firmly by the piecesD D, which have in their upper ends the pieces d cl and whose lower ends engage with the hole or annular slot a of the piece A, so that they can be readily adjusted or removed. The piece C may also be screwed to the piece A, as shown in Fig. 8, by providing it with the downwardly-projecting internally-threaded flange c, which engages with an external thread a2 on the outside of the'piece A. This piece C serves to hold the metal and keep its outer edge from puckering as it is drawn over the edge of the die. By this application of the piece O to an irregular-shaped piece A, I avoid the necessity of fiattening the flange of the blank after the first blow has been struck, which would harden the iange and necessitate annealing.

Resting on the face of the piece A, I place before the first or blocking blow the piece E, upon which the blank S rests, the whole being clamped together by a clamp or other suitable device. The piece E lies around the opening of the piece A and has its inner lip e turned down so that it projects slightly into the opening, as shown in the drawings, the inwardly-turned lip c of thepiece E fitting accurately into the piece A all around the edge. This piece E is an important feature of my device, as it presents a smooth rounding edge over which the metal of the blank can be drawn without straining it, as would be the case if it were drawn over' the edge 0.3 of the piece A, which is necessarily made sharp in order that the finished article may have a sharp corner s between its body and fiange after it has been driven home in the piece A by the piece B2. The piece E also allows the IOO blank S to be forced into the piece A by the first blow, as shown in Fig. 2, which shows the blocking force Withdrawn after the first blow. It Will be seen that the blank touches the piece A only at and near its bottom, but on account of the thickness of metal in the piece E it does not fill the upper part of the piece A. This is better illustrated in 3, which shows the blank in the piece A after the piece E and piece G have been removed, Which is the position it is in before being struck by the piece B2.

As described, the finishing force lits the face and cavity of the piece A accurately, so that it forces the blank into the piece A, pressing it into its remotest corners or irregularities and also smoothing out any irregularities or flutings which the blank may have in consequence of the iirst bloW. This result is made possible by the fact that the blank does not completely fill the piece A after the first blow, as hereinbefore described. The iinishing force also leaves the corner s sharp, so

that the iiange can be trimmed oi, as is usually done.

What I claim isl. A device for shaping hollow'rnetallic articles from sheet metal, consisting of the pieces A, E, and C rigidly connected together in combination with the piece B, all arranged and operated substantially as described.

2. In a device for shaping hollow metallic articles from sheet metal, a piece A and a piece C in combination with a piece E rigidly held between the pieces Aan'd C, all arranged substantially as described.

3. In a device for shaping ,holloWmetallic articles from sheet metal, a die provided with a piece E having its inner edge rounded over substantially as shown and described.

In Witness whereof I have hereunto set my hand.

VILLIAM MCAUSLAND.

Vitnesses:

LEWIS A. HoDGEs, F. L. FISH.