Improvements in Dies for Making Rolled Forgings.
Year: 1889

page_text: Date of Application, 31st Dec., 1889-Accepted, 8th Feb., 1890
COMPLETE SPECIFICATION.
[Communicated from abroad by THE GOULD ROLLING MACHINE COMPANY, of Leominster,
County of Worcester, State of Massachusetts, United States of America.]
Improvements in Dies for Making Rolled Forgings.
1, HENRY HARRIS LAKE, of the firm of Haseltine, Lake & Co. Patent Agents,
Southampton Buildings in the County of Middlesex do hereby declare the nature of
this invention and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement :-
This invention relates to dies for making rolled forgings which are especially
applicable for use with rolled forging machines having a vertical rotary or reciprocating
movement; and it consists in certain novel features hereinafter set forth, the object
being to produce a simpler, cheaper and more effective device of this character than is
now in ordinary, use.
The nature and operation of the improvement will be readily understood by all
conversant with such matters from the following explanation.
In the accompanying drawing :-
Figure 1 is a side elevation of the improved dies represented as in use.
Figure 2 an enlarged vertical section taken on the line x, x, Figure 1.
Figure 3 a vertical section taken on the line y, y, Figure 1.
Figure 4 a plan view of the convex die ; and
Figures 5 and 6 sectional views illustrating details of construction.
Like letters and figures of reference indicate corresponding parts in the different
figures of the drawing.
A, B, represent the dies considered as wholes.
The bed pieces d, f of these dies are curved on arcs of the same circle and are
provided with screw holes g at each end to attach them to the machine.
The working face h, of the die A, is disposed longitudinally on the outer face of the
bed-piece d, forming a die convex in longitudinal section. In the die illustrated which
is particularly adapted for rolling balls or similar globular forms, the working face h,
is provided centrally with a longitudinal groove i, which is curved in cross section and
widens and deepens gradually from its forward end j, to its rear end k, at which point
it is nearly semi-circular, as best shown in Figures 2 and 5.
The face h, at each side of the groove i, is beveled forming cutting-bosses l, which
gradually increase in height or width from the toe j, to the rear end k of said face, as
shown in Figure 4.
The faces of the bosses are punctured or indented at m in such manner that the
edges of said indentations do not project above or beyond the surface of the bosses.
The die B, has its working face p disposed longitudinally on the inner face of its
curved bed-piece f, forming a die concave in longitudinal section. Said working face
is provided with a groove and diverging inclined cutting bosses r, having indented
faces all constructed in substantially the same manner as the face of the die A.
In the use of my improvement the dies are placed in the position shown in Figure 1
their working faces being adjacent and standing in a plane passing longitudinally
through the centres of both.
The rod or ingot H, from which the forging is to be formed is placed diagonally
across the dies which move in opposite directions, the toes or points j, v, of their
working faces approaching each other and engaging the rod on opposite sides.
As these dies pass each other their cutting bosses 1, r are forced into the rod forming
the ball z, in a manner readily understood by all conversant with such matters.
The heated metal of the rod is forced into the indentations m in the beveled faces
of the cutting bosses, the dies being thus prevented from slipping thereon and the rod

page_text: This renders the formation,
caused to rotate rapidly between them as they move.
especially of spherical or cylindrical articles much more perfect.
The beveled faces of the bosses 1, r inclining outward as shown in Figure 2 forces
the superflous metal away from, the ball into the body of the bar.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, as communicated to
me by my foreign correspondents, I declare that what I claim is :-
First. A die for making rolled forgings having a concave working face comprising
a longitudinally arranged groove semi-circular in cross section and formed between
diverging cutting and spreading bosses having outwardly inclined indented faces
substantially as described.
Second. Companion dies for making rolled forgings having their working faces
respectively concave and convex in longitudinal section and provided with cutting
bosses having indentations in their spreading faces substantially as described.
Third. A die for making rolled forgings having a working face convex in longitudinal
section, said face comprising a cross-sectional semi-circular groove formed between
diverging cutting bosses having outwardly inclined spreading faces provided with
indentations substantially as described.
Fourth. Dies for making rolled forgings having indentations in their spreading
faces substantially as and for the purpose set forth.
Dated this 31st day of December 1889.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.