Improvements in Forming Solid Flanges upon Shafts and in the Tools therefor.
Year: 1898

page_text: Improvements in Forming Solid Flanges upon Shafts and in the
Tools therefor.
I, WILLIAM ROGER DAWE, 82, Andover Street, City of Sheffield, Manager of
Steel Works, do hereby declare the nature of my invention to be as follows:-
My invention relates to the formation of flanges or collars upon metal shafts,
and to the tools used for that purpose.
According to my method, I form a solid flange upon the end of a shaft in the
following manner, using a portable or horizontally suspended hydraulic press
for flanging, in combination with an ordinary vertical hydraulic forging press
for holding the shaft while under operation.
I prepare a pair of top and bottom dies or holding tools for the forging press,
the top one arranged to be raised and lowered by the ram, and the lower one
both
being fixed or held upon the bed of the press in any suitable manner;
holders are so formed that when put together there is a centre opening of a
hexagonal (or other equivalent form,) and an opening on each side of it to
receive the arms of the horizontally suspended or portable flanging press.
A pair of flanging dies consisting of two facsimile halves, are made to fit into the
hexagonal opening in the holding tools, having when put together a head of
larger diameter, which bears against the holding tools.
The head is formed with a circular recess of the diameter and depth of the
intended flange, and rounded off into the centre hole for the shaft to pass through.
Each half of the flanging die is secured by bolts or the like to the holding
tool which carries it. The arms of the suspended or portable press are placed in
the grooves prepared for them in the bottom holder with their heads against the
back face of same.
The shaft end having been brought to a proper heat is placed in position in
the bottom die, with sufficient metal projecting beyond the head of the dies, to
form the flange and fill the circular recess.
The top holder and half die is now lowered upon the lower one and the shaft
firmly gripped by hydraulic pressure between them, its end being opposite the
face of the ram.
The action of the ram upon the projecting end of the shaft forces it back into
the recess or matrix formed in the head of the flanging dies, at the same time
enlarging its diameter, and finally filling the recess and producing a flange of
the desired diameter and thickness.
To produce a collar at some distance from the extreme end of a shaft, the
metal in that part only is heated, and the shaft held in the flanging dies as
before.
The pressing tool in the horizontal press is made with a hole to receive the

page_text: end of the shaft up to the heated part or thereabouts so that when pressure is
brought to bear the heated portion is enlarged and pressed into shape.
Dated the 4th day of November 1898.
ROBT. F. DRURY, C.P.A.,
Agent for Applicant, Bank Buildings, George Street, Sheffield.
Improvements in Forming Solid Flanges upon Shafts and in the
Tools therefor.
I, WILLIAM ROGER DAWE, 82, Andover Street, City of Sheffield, Manager of
Steel Works, 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 the formation of solid flanges or collars upon metal
shafts, and to the tools used in carrying out the process.
The accompanying drawings illustrate my invention, like letters refer to like
parts in any of the figures.
Fig. 1, is an elevation and section of a top and bottom die holder, technically
called a pellet and anvil, with a pair of dies for flanging.
Fig. 2, back and edge views of the said dies.
Fig. 3, end of shaft before and after the operation of flanging.
Fig. 4, plan of apparatus with a shaft in position ready for flanging.
In carrying out my invention in producing a flange upon the extreme end of
a shaft as illustrated in Fig. 3, I prepare a pair of dies and holders of suitable
form and size for the required work; the holders A and B, are held in a hydraulic
press, such as a usual forging press, and the dies C and D, are secured to the
holders by screws F, or equivalent means, and are prepared with projecting
parts C & D², which fit into corresponding recesses made in the holders. The
dies have a central opening G, to receive the shaft S, and a concentric recess J*
to receive and form the metal into a flange J.
Openings H, are made through the junction of the holders to receive the
arms E of the portable hydraulic press P P, the ram of which I prefer to be
provided with a removable head R, so that others may be substituted as desired.
The holders with the dies being secured to the fixed press, and the upper one A
being raised, the arms of the suspended portable press are placed in the grooves H,
and the part A lowered.
The shaft end being brought to a suitable heat is passed through the centre
hole G, and the top die C, forced down upon it by the hydraulic press so as to
grip and securely hold it from being moved longitudinally as shown in Fig. 4,
the end of the shaft being opposite the ram of the portable press.
The action of the ram R of the press P P, which is now set in motion, upon
the shaft end forces it back into the recess or matrix Ja, in the flanging dies,
expanding it until the recess is filled, thus producing a flange J, of the desired
diameter and thickness.
To produce a collar at some distance from the extreme end of a shaft, the
metal is heated in that part only as will be understood, and the shaft is held in
the flanging dies in a similar manner to that before described, the head of the
ram of the portable press being constructed with a passage to receive the pro-
jecting end of the shaft up to the heated part or thereabouts.

page_text: I am aware that flanges upon shafting have been made by the aid of hydraulic
pressure and I therefore do not claim this broadly, but
Having now particularly described and ascertained the nature of my invention,
and in what manner the same is to be performed, I declare that what I claim,
is:
:-
The improvements in the process of forming or producing solid flanges upon
metallic shafts herein before described, with reference to the annexed drawings.
In the process of forming flanges upon shafts by hydraulic pressure, the use
of combined holders A & B, with dies C & D, for holding the shaft by hydraulic
pressure while being operated upon by the ram of a portable hydraulic press,
as hereinbefore described and shown.
Dated the 4th day of August 1899.
ROBT. F. DRURY, C.P.A.,.
Applicant's Agent.