US352367A - Making metal-rolling dies - Google Patents

Description

(No Model.) 3 SheetsSheet 1.

G. P. SIMONDS. MAKING METAL ROLLING DIES.

No; 352,367. Patented Nov. 9, 1886.

(No Model.) 3 Sheets-Sheet 2.

G; P.. SIMONDS.

MAKING METAL ROLLING DIES.

No. 352,367. Patented Nov. 9, 1886.

(No Model.) I I 3 Sheets-Sheet 3.

G P. SIMONDS.

MAKING METAL ROLLING DIES.

N9. 352,367. Patented Nov. 9,1886.

N. PETERS. Pnmuum mr. Washin ggggg c UNITE TATES' ATENT Erica.

MAKING METAL-ROLLING DIES.

SPECIFICATION forming part of Letters Patent No. 352,367, dated November 9, 1886.

Application filed April P, 1886. Serial No. 198,257.

.To all whom it may concern.-

Be it known that I, GEORGE F. SIMoNDs, of Fitchburg, \Vorcester county, Massachusetts, have invented a new and Improved Method of Making Dies for Making Rolled Forgings; and I hereby declare the following to be a full, clear, and exact description ofthe same, reference being had to the accompanying drawings, making part of thisspecification, in which- Figure 1 is a perspective view of the die after the first step of manufacture. Fig. 2 is a perspective view during the second step. Fig. 3 illustratesthe die during the third step, and .the character of the cutting-tool applied. Fig. 4 illustrates the die completed. Fig. 5 illustrates a modification of a completed die wherein the working-faces are sectional and the idle portion of the face entirely removed.

My invention relates to dies to be used in the forging-machine upon which a patent was issued to me on June 9,1885, No. 319,752, and has for its object to provide a cheap yet perfect way of constructing said dies.

To this end myinvention consists in anovel method of forming the diefaces, by first cuttingthe face of the die in the configuration of more or less of the cross-sectional area of the article to be formed to make a shaping and finishing surface, then cutting the side walls of the die on diagonal lines to the horizontal and vertical planes of the die to form spreading and reducing surfaces, and finally removing the surplus metal or idle-face portions of the die, to prevent unnecessary friction.

In order that those skilled in the art may "make and use my invention, I will proceed to describe the manner in which I have carried it out.

For purposes of illustration in this specification I have selected a die designed to roll aconical steel shot; but whatever the variation of the face of the die may be the method of making is the same. The entire shape is given to the die by means of a planer.

I first take the steel plate A from which the die is to be made and after dressing otf the bottoin and sides plane throughout its length a shape conforming to one-half of the article to be forged, thereby making a form, a b c d, constituting the shaping and finishing surface (N0 model.)

at such an angle to the bed of the planer as to give the required angle to the reducing and spreading surfaces of the die. I then locate the die at such an angle to the planer-bedthat in its passage the tool shall remove the metal from the point ac to the central point, 0, of the forming-surface at one end and the outer point, I), of the forming-surface at the other end of the die, the depth of the out being such as to make the distance between the blank-supporting surface 1'. and the corresponding surface on the opposite die-face a trifle more than the size of the bar to be forged. After the foregoing step there remains in the walls of the die outside of its interior working-lines a quantity of surplus metal, id1eface, not necessary to successful forging, and calculated to produce frictional distortion of the work. Toremove this I place the cutting-edge of a tool, 9, at an angle nearer a perpendicular than the angle of the reducing and spreading surfaces, as seen in Fig. 3, and locate the die on the planerbed, so that the surplus metal may be cutaway, leaving the reducing and spreading surface at such a width as to best facilitate its practical Working. The reducing and spreading surface on the other side of the die is brought to shape, and the surplus metal removed in the same manner.

It is evident in the working of these dies that when the forming-surface has completed its work at any given point said forming-surface from that point to the finishing end of the die is unnecessary and at times objectionable, in that it causes unnecessary friction, and I avoid this by removing within the interior lines of the die those portions of the formingsurfaces between the terminal end of the die and the point where the forming-surface has completed its work. This is done by cutting such idle face in proper lines diagonal to a horizontal plane, andis particularly well illustrated in the modification shown in Fig. 5, where I have illustrated adie made in sections A A to A A A. In this instance the work near the base of the shot (its greatest diameter) is completed substantially by the time the die has passed the work as far as sections A ICO and A and from this point to the finishing face corresponding to and the converse of the end of the die the surplus metal is cut away cross-sectional form of the article to be pro-- or gradually diverging, as seen at n n, and the duced, forming the spreading and reducing completed portions of the work do not add to surfaces by a cut diagonal to both planes of I 5' \5 the friction of the passing dies. the blank and finally removing the surplus Having thus described my invention, what metal, or idle-face portions, substantially as I claim as new, and desire to secure by'Letters set forth.

Patent, is c GEO. F. SIMONDS.

The method herein described for making dies WVitnesses: I 10 for making rolled forgings, consisting, essen G. E. DOWNE,

tially,-i11 first forming in the die-blank a sur- H.-S. DOWNE.

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