Improvements in Machines for Forging, Swaging, or Hammering Metal Articles.
Year: 1896

page_text: Date of Application, 22nd Oct., 1896
Complete Specification Left, 23rd Nov., 1896-Accepted, 24.h Dec., 1896
PROVISIONAL SPECIFICATION.
Improvements in Machines for Forging, Swaging, or Hammering
Metal Articles.
I, FREDERICK GEORGE MYERS, of Box No. 2503 Johannesburg, South
African Republic, Mechanical Engineer, do hereby declare the nature of this
invention to be as follows:-
My invention relates to a machine for forging, swaging, or hammering metal
articles for example for forging rock or other drills or the like. The sail in chine
contains certain slides working in grooves or guides with detachable dies or
swages at their inner ends and arranged to deliver powerful blows or pressure
whereby the metal placed between them is speedily formed to the desirel shape
without employment of skilled labour. It is evident that I may also make the
slides and dies in one piece.
According to one convenient construction the frame of the machine is similar
in form to an angle bracket having a vertical face on which are secur.d a number
of projecting blocks which form a circle on their outer periphery. Between the
blocks are radial grooves in which the slides or dies work. For shaping or
forging star drills there are four slides and four grooves the latter crossing each
other at right angles. It is obvious however that for other kinds of work I
may employ any desired number of slides. The slides, have, at their inner or
converging ends dies or swages necessary to give the required shape to the work
being operated upon. The other or outer ends of the slides project heyond the
periphery of the aforesaid blocks between which they move and the ends of the
said slides are made with a slight curvature to act as cams. For actuating
the slides I provide a series of rollers which work in an annular space between
the inner surface of a ring or driving pulley, and the outer circular periphery
of the projecting guide blocks. The said rollers are placed at suitable distances
apart and are held in position by means of a suitable frame. The said rollers are
so placed in the frame as to act upon the slides and cause them to converge
simultaneously.
The driving pulley and the frame containing the rollers are preferably retained
in their positions by suitable means such as a plate fixed to the body of the
machine by studs or bolts passing through the projecting blocks.
The machine is actuated by a belt passing over and rotating the driving pulley
which in turn imparts motion to the rollers and causes them to roll over the
projecting ends of the slides thus forcing the dies inwardly into or upon the work.
I preferably make the rollers longer than the depth of the dies or swages and
provide stationary circular paths at the back and front of the slides for the rollers
to roll upon, so that when desired one or more of the dies may be removed
without interference with the working of the machine.
The aperture formed by the corresponding faces of the dies is tapered towards
the front of the machine and by pushing the bar into the aperture the dies are
again opened ready for the successive operations. Stops are provided to prevent
the slides moving radially outward too far.
I also prefer to provide a suitable water jacket in the frame of the machine for
keeping the parts cool.

page_text: Although I have described the above means for imparting motion to the slides
and dies I may also employ any other suitable mechanism.
Dated this 22nd day of October 1896.
HASELTINE, LAKE & Co..
45 Southampton Buildings, London, W.C., Agents for the Applicant.
Improvements in Machines for Forging, Swaging, or Hammering
Metal Articles.
I, FREDERICK GEORGE MYERS, of Box No. 2508 Johannesburg South
African Republic, Mechanical Engineer, 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 :-
My invention relates to machines for forging, swaging or hammering metal
articles for example for forging rock drills and the like.
The said machine contains certain slides working in grooves or guides with
detachable dies or swages at their inner ends so arranged as to compress the metal
placed between them to the desired shape. It is evident that I may also make
the slides and dies in 'one piece.
Referring to the accompanying drawings which illustrate a machine constructed
according to my invention,
Figure 1 is a front elevation of the machine with certain parts broken away to
show the internal construction, and
Figure 2 is a section on the line x, x of Figure 1.
Like letters of reference denote corresponding parts in both figures.
A is the frame or standard of the machine, the same preferably being made
hollow and proviled with an inlet a and an outlet a' for water, air or other fluid
which is circulated through the frame to keep the parts of the machine cool.
B, B are slides arranged radially to slide in grooves formed by blocks C, U
projecting from the vertical face of the frame A. The outer peripheries of the
said blocks are curved and together form a circular path upon which the
roliers D, D that operate the slides as hereinafter described move. I have shown
four slides B arranged in the form of a cross for the purpose of forging or shaping
what are known as "star" drills. For other kinds of work a different number
and arrangement of the slides may be necessary. The inner ends of the slides
are suitably formed to give the required shape to the work being operated upon,
or they are fitted with dies or swages suitably shaped for the purpose.
The outer ends of the slides project slightly beyond the circular periphery of
the blocks C and they are made with a slight curvature as shown to act as cams.
The rollers D that actuate the slides work in an annular space E between the
inner surface of a very strong ring or driving pulley F and the outer circular
periphery of the blocks C. The said rollers are kept at the proper relative
distances apart by being mounted in a frame formed by a pair of rings G, G
connected by distance pins or studs G at suitable intervals. The axles of the
rollers turu freely in bearings formed in the rings or ring framing. It is obvious
that this frame may be otherwise constructed for the purpose specified. The
driving pulley F is kept in position by the ring frame which in turn is retained in
position by any suitable means for example by a plate I bolted to the blocks C.
The said plate is formed with an annular groove H' on its inner face which groove
embraces a circular rib C¹ forined on the face of the blocks C, and thereby keeps
the plate in its proper position.

page_text: The machine is actuated by a belt F1 passing around and rotating the driving
pulley F which in turn imparts motion to the rollers D and causes them to roll
over the projecting ends of the slides thus forcing the slides inwardly into or
upon the metal placed in the space between their converging ends. The spacing
of the rollers is such that all of the slides are moved inward simultaneously. By
forming the outer ends of the slides with a cam like curvature as shown, the
movement of the slides is made more gradual and great power is ensured. I
preferably make the rollers longer than the depth of the dies as seen from
Figure 2 and provide stationary circular paths J, J' in the frame A and cover plate H
respectively for the said rollers to roll upon so as to allow of the removal of one
or more of the slides when desired without removing the rollers or interfering
with the working of the machine, the rollers being prevented by such paths J, Ji
from entering the space between the blocks C. The aperture or space L between.
the working faces of the slides or dies is tapered towards the front of the machine-
so that by pushing the bar or metal to be operated upon into the said taper
aperture the dies are pushed out, after each inward movement thereof, into the
position where they can be again actuated by the rollers. Fixed stops K, K are
provided to limit the outward movement of the slides.
It is obvious that the manner of operating the slides may be varied without
departing from the spirit of my invention.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is :-
1. A machine furnished with two or more radially moving slides working in
grooves or guides and adapted to be simultaneously moved to and from a common
centre the said slides being fitted with or forming dies at their inner ends,.
substantially as, and for the purposes, specified.
2. A machine having rollers working in an annular space between a revolving
outer ring and a stationary part of the machine, the said rollers being adapted to
roll over the cam like projecting outer ends of the slides substantially as, and for
the purposes, specified."
3. In a machine for forging rock drills the use of a chamber attached to or
forming part of the frame through which chamber water, air or other fluid can be
circulated for the purpose of keeping the working parts cool, substantially as
described.
4. A machine constructed substantially as described with reference to the
accompanying drawings and operating as, and for the purposes, described.
Dated this 292rd day of November 1896.
HASELTINE, LAKE & Co.,
45 Southampton Buildings, London, W.C., Agents for the Applicant..