Apparatus for Forging by Revolving Discs Articles of Circular Transverse Section.
Year: 1887

page_text: Date of Application, 4th Feb., 1887
Complete Left, 3rd Nov., 1887
• Complete Accepted, 9th Dec., 1887
Apparatus for Forging by Revolving Discs Articles of Circular
Transverse Section.
We, CHARLES FAIRBAIRN of May Bank, Clarendon Road, Sale in the County of
Chester, Engineer, and MATTHEW WELLS of 61 Hardman Street, Deansgate, Man-
chester in the County of Lancaster, Oil Refiner do hereby declare the nature of this
invention to be as follows:-
This invention relates to apparatus for forging articles of circular transverse
section, such as balls or elongated projectiles, by subjecting them to rolling pressure
between the faces of two oppositely revolving discs suitably shaped to the contour of
the articles to be forged. I mount the one disc on an axis which is a little inclined to
the axis of the other disc and lies in a plane which is a little to the one side of a
parallel plane passing through the axis of the other. Thus the faces of the two dises
are somewhat inclined and somewhat eccentric to each other. In each face is turned
a groove or set of grooves shaped to suit the contour of the article to be forged, and
in front of those parts of the peripheries of the discs which approach nearest to one
another is fixed a guide on which or in a slot of which can be rested the piece of metal
that is to be forged. This piece or blank is thrust in between the revolving discs at a
point where their surfaces are sufficiently wide apart to admit it, and is caused to
revolve by their frictional contact with it. As it is advanced towards the part of the
periphery where the space between the discs is the least, it becomes gradually pressed
as it revolves to the desired shape, until, finally, it passes the narrowest part in a
finished condition: By making the one disc a little larger than the other, while both
are driven at the same angular velocity, the surface velocity of the larger one being
somewhat greater than that of the other, is made to act in such a manner as to
gradually advance the blank towards the narrowest part of the gap between the discs.
The faces of the discs used, especially for such articles as elongated projectiles, are
grooved with hollows and intervening lands set obliquely to radii, in such a direction
is to press the metal of the blank towards the point of the projectile. Such grooves
and lands are also useful generally as they have the effect of smoothing and finishing
the surface of the forging.
D
1 11. ALL
1007
ABEL & IMRAY,
Agents for the Applicants.

page_text: Apparatus for Forging by Revolving Discs Articles of Circular
Transverse Section.
We, CHARLES FAIRBAIRN of May Bank, Clarendon Road, Sale in the County of
Chester, Engineer, and MATTHEW WELLS of 61 Hardman Street, Deansgate, Man-
chester in the County, of Lancaster, Oil Refiner 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 apparatus for forging articles of circular transverse
section, such as balls or elongated projectiles, by subjecting them to rolling pressure
between the faces of two oppositely revolving discs suitably shaped to the contour
of the articles to be forged. I mount the one disc on an axis which is a little
inclined to the axis of the other disc and lies in a plane which is a little to the one
side of a parallel plane passing through the axis of the other.
Thus the faces of the two dises are somewhat inclined and somewhat eccentric to
each other. In each face is turned a groove or set of grooves shaped to suit the
contour of the article to be forged, and in front of those parts of the peripheries of the
discs which approach nearest to one another is fixed a guide on which or in a slot of
which can he rested the piece of metal that is to be forged. This piece or blank is
thrust in between the revolving discs at a point where there surfaces are sufficiently
wide apart to admit it and is caused to revolve by their frictional contact with it. As
it is advanced towards the part of the periphery where the space between the discs is
the least it becomes gradually pressed as it revolves to the desired shape, until,
finally it passes the narrowest part in a finished condition. By making the one disc a
little larger than the other, while both are driven at the same angular velocity the
surface velocity of the larger one being somewhat greater than that of the other, is
made to act in such a manner as to gradually advance the blank towards the narrowest
part of the gap between the discs. The faces of the discs used especially for such
articles as elongated projectiles are grooved with hollows and intervening lands set
obliquely to radii in such a direction as to press the metal of the blank towards the
point of the projectile. Such grooves and lands are also useful generally as they have
the effect of smoothing and finishing the surface of the forging.
The accompanying drawings represent a machine for forging in the manner above
described Fig. 1 is a front view Fig. 2 is a side view of the machine. Fig. 3 is a
plan of the lower disc and Fig. 4 is a front view of the guide plate. A shaft A driven
by any suitable motor, by means of bevil gear B and spur gear C and D gives motion
in opposite directions to two shafts, the one E vertical, and the other somewhat
inclined and also eccentric to E. On these two shafts are fixed the discs G and H,
the fates of which are so shaped that a section taken through them where they are
nearest together has the profile of the article to be forged, such for instance as a
conoidal projectile. For many purposes the shaping portion of each disc has inclined

page_text: grooves cut in it as shewn in Fig. 3, the edges of these grooves tending as the discs
revolve to force the metal of the forging towards the point of the forging, and smoothing
the surface and charing it of scale. A guide plate K may be fixed in front of the
discs with a horizontal slot, through which the bar of metal can be introduced between
the discs, and along which it can travel as it becomes reduced in diameter by the
action of the discs.
We are aware that it has been proposed to forge articles of circular transverse
section between the faces of oppositely revolving discs of suitable shape, we therefore
make no general claim to forging in this manner, but
Having now particularly described and ascertained the nature of our invention and
in what manner the same is to be performed we declare that what we claim is :-
1. Apparatus for forging articles of transverse circular section between a pair of
oppositely revolving discs, one of which has its axis inclined and eccentric to the axis
of the other, substantially as described.
2. In apparatus such as is referred to in the preceding claim, forming in the faces
of the discs grooves inclined to radii substantially as and for the purpose herein
set forth.