Method of Manufacturing Angle, Tee, and other Shaped Pipe Connections or Couplings of Weldable Materials.
Year: 1889

page_text: [Communicated from abroad by MESSES. THYSSEN & CO, of Doylum, new
on-Ruhr, Germany.]
Method of Manufacturing
Angle, Tee, and other Shaped Pipe
Connections or Couplings of Weldable Materials.
I, WILLIAM LLOYD WISE, of No. 46 Lincoln's Inn Fields in the County of
Middlesex, Consulting Engineer, and Patent Agent, 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 a new method of manufacturing angle, tee and cross
shaped pipe connections or couplings (hereinafter called connections) of weldable
materials such as wrought iron, malleable cast iron and steel and which consists in
heating pieces of the material cut to the proper shape to form the welded pipe-
connections simultaneously bending the several parts thereof to the desired form by
means of suitable matrices or dies that are mounted on an anvil or bed plate, and
subsequently and simultaneously welding the necessary edges to form a complete
pipe-connection with the aid of suitable dies and a movable stamp.
The accompanying drawings show, as an example the process of making an angle
or elbow pipe connection according to this invention. A blank of the shape shewn
in side and end elevation in Fig. 7 is first stamped out of a sheet of the metal of
which the elbow piece is to be formed. Such a blank a after being made red hot, is
placed on the die a¹ Figs. 1, 2 & 3 in the manner indicated in dotted lines in Fig. 2.
The blank a is then pressed into the die by means of the correspondingly formed
die or stamp a Figs. 4, 5 & 6, and thus is caused to assume the shape shown in
Figs. 8, 9 & 10. The bent blank or sheet a is then placed at a red heat on the
press shown in Fig. 13, being placed in the position indicated by the dotted lines
and over it there is placed a cylindrical mandrel b whose diameter is slightly less
than that of the bore of the finished elbow piece to be made.
On the mandrel & there is perpendicularly seated a second mandrel c which at its
lower end is cut out in the form of a semicircle, to fit the mandrel b and which is
fixed to a stamp d.
The stamp d is then moved downwards, and the elbow piece a thus pressed into
the die e and caused to assume the shape shown in full lines in Fig. 13 and in

page_text: The die e (Fig. 13) imparts the necessary external shape, to the elbow piece, whilst
the internal shape is caused by the mandrels b & c.-The elbow piece thus formed is
now ready to have its adjacent edges welded together, for which purpose it is raised
to a welding heat, and placed in the apparatus shown in Figs. 14 15 & 16, which
comprises two dies f&g each of which is hollowed out to correspond in shape with
one half of the elbow piece a so that when the two dies are laid one on the other
they enclose and compress such elbow piece. hand i are two mandrels that pass
from the sides into the dies f & y as shown in Fig. 14 so as to touch each other at
right angles and thus form a core for the elbow piece to be welded.
The introduction and withdrawal of the mandrelsh & i may conveniently be
effected by means of the apparatus shown in Fig. 14 which comprises levers ³ ³
and link hand the operation of which will be readily understood from the drawing.
The introduction and withdrawal of the mandrels may however be effected by any
other suitable arrangement of apparatus. For welding, the elbow piece is placed, at
a welding heat, on the lower die g the mandrels & are adjusted in position and
the upper die is forced upon the elbow piece by pressure, or by a blow, and thus
causes the adjacent edges of such elbow piece to be welded square together. For
larger pipe connection pieces after the edges have been bent up, the parts which are
to be welded together should be chamfered so that the resulting joint shall not be
square but shall overlap obliquely. In Fig. 17 & 18 there is shown an apparatus or
press for thus chamfering the edges of a bent plate. This apparatus or press
comprises two dies m and n arranged to be moved relatively to each other and
between which the joint pieces a when bent into the shape shown in Figs. 8, 9 & 10
are placed two at a time as shewn so that their edges are chamfered by means of
the rounded portions m¹ & n' of the dies, as indicated by the dotted lines in Fig. 18
at the edges of the pieces.
For producing tee and cross shaped pipe connections the form of the metal blank
and of the dies herein before described are correspondingly modified the method of
operation remaining the same.
In this method therefore, the bending and the welding of the joint pieces take
place at all points at once, as against the old method of hand manufacture, where
the bending of the edges, and also the welding had to be carried out for each of the
various parts in succession repeated reheating of the pieces being thus rendered
necessary.
The novel & characteristic features therefore of the present invention consist in the
simultaneous bending of all the edges of the blank, and in the subsequent simultaneous
welding of all the joints of the pipe connection.
Having now particularly described and ascertained the nature of the said inven-
tion, as communicated to me by my foreign correspondents, I declare that what
I claim is
The herein described method of manufacturing angle tee and other shaped pipe
connections from weldable materials, by simultaneously bending all the edges of the
blank necessary to form the pipe connection by means of suitable dies, stamps and
wandrels such as are illustrated in the accompanying drawings and the shape and
dimensions of which are made to correspond with the form of pipe connection to be
produced and subsequently and simultaneously welding all the joints or adjacent
edges of.the.bent piece together.
Dated this 1st day of Anil 1980