Improvements in Machines for Flanging Boller and other Plates.
Year: 1891

page_text: Date of Application, 8th July, 1891-Accepted, 8th Aug., 1891
COMPLETE SPECIFICATION.
Improvements in Machines for Flanging Boller and other Plates.
HUGH SMITH Senior, HUGH SMITH Junr., and OSBOURNE SMITH, Engineers,
Possil Engine Works, Glasgow, in the County of Lanarkshire, 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 :-
Our invention relates to a method of applying hydraulic power for flanging
boiler and other plates, and consists in the method and style of machine and blocks
for flanging the outside edge of boiler end plates as shown on Sheet 1, Fig. 1, in,
which A. represents the boiler end plate to be flanged. B. and C. represent
respectively a vertical ram and a diagonal ram. D, E, and Frepresent respectively
the blocks to be used for flanging, the blocks D & E being fixed respectively to the
rams B&C. H represents a small block with roller, and G represents a small
hydraulic ram. The method of flanging is as follows:-When the plate A is
placed in position as shown and having an eccentric pin K on which to revolve to
the required radius, the pressure water is admitted to the rain B, thus causing the
block D to be brought down on the top of the plate, holding it fast. Pressure
water is then admitted to the diagonal ram C, which forces down the block E on
to the corner of the plate A, flanging it over as shown Sheet 1, Fig. 1. The rams
are then taken back, and the plate moved round on the pin K, till the whole plate
is flanged in a similar manner. To facilitate the moving round of plate a small
roller in moveable block H is fitted in the centre of block F, to which the ram G
is held up by hydraulic pressure, so that the top of the said small roller is
sufficiently clear to allow the plate to turn easily; and when the ram B is brought
down, it forces back the small ram G until the plate comes hard down on the
block F. Thus as the large ram B and block D move up and down the plate is
respectively relieved and held, and the weight of the plate, being carried by the
roller H, is easily moved round. When the machine is required to flange the end
plate to recoive the furnaces or flues as shown on Sheet 2, Fig. 2, the diagonal
ram has the blocks removed and can be taken up clear, thus leaving the table of
the machine clear of the blocks for this work.
Our invention also consists in the application of a double or triple power ram as
shown on Fig. 3, Sheet 2, in the position and in place of the single power ram B.
Fig. 3, Sheet 2, represents a section through the cylinders, showing the method
of obtaining the double or triple power, in which A represents a large rum, Ba
smaller ram,
C the drawing-back arrangements for these rams, and E & F cylinders
in which these rams work. The rams A & B may be made either in one piece or
fixed together. To obtain the first or greatest power the pressure water is
admitted to the ends of both the cylinders E & F, thus acting on both the
rams A & B. To obtain the second or intermediate power the pressure water is
admitted to the end of either of the cylinders E or F, according as any one of
the rams in these cylinders may be more powerful than the other. To obtain the
third or smallest power the pressure water is admitted to the end of either of the
cylinders E or F, according as any one of the rams in these cylinders may be less
powerful than the other. When only a double power ram is required the power of
the rams A & B may be made equal, thus giving the power of the two rams or
the power of any one of them.
Having now particularly described and ascertained the nature of our said inven-
tion, we hereby declare that what we claim is :-
1st
-
The method and style of flanging boiler end plates by means of vertical
and diagonal rams as herein before described, in connection with Fig. 1, Sheet 1, on
the drawings hereunto ennended.

page_text: 2nd: The application of the small block H with roller, fitted in the block F, and
the working of the said roller by the small ram G for the better manipulation of
the plate being flanged; all as hercin before described in connection with Fig. 1,
Sheet 1.
3rd The application and arrangement of the double or triple power ram, all
as herein before described in connection with Fig. 3, Sheet 2.
Doted 7th day of Til 1901
HUGH SMITH, SENIOR.
HUGH SMITH, JUNIOR.
OSBOURNE SMITH.