Improvements in Plate Bending Machinery.
Year: 1897

page_text: Date of Application. 8th June, 1897
1000
ALL
2000
Improvements in Plate Bending Machinery.
I, JOSEPH BARROW, of the Firm of Thomas Shanks and Company, of the Union
Iron Works, Johnstone, in the County of Renfrew, North Britain, Engineer, do
hereby declare the nature of this invention to be as follows, that is to say:-
My said invention relates to plate bending machinery of the kind in which two
lower horizontal rolls are combined with an upper roll which is adjustable verti-
cally; and my object is, by improved construction and arrangement to make such
machinery capable of bending plates of large size, and of being easily adjustable
for plates of different thicknesses or resistances.
When the rolls have to be of considerable length, say twenty feet and upwards,
to be suitable for bending large plates, the upper roll is liable to yield to the bend-
ing strain, if not made of a considerable diameter involving great cost and other
inconveniences. By my invention however I am enabled to use an upper roll of
moderate diameter; and in carrying it out I employ one or more pairs of small
rollers which are arranged to bear on the upper roller and to prevent it from
yielding upwards at and near the middle of its length. These upper bearing rollers
are carried in a frame or frames secured to a stationary upper beam which is fixed
or connected to blocks which move with the upper roll in the guides of the housings
of the machine. The beam may be of any suitable section, its strength and sub-
stance being, however, made greatest at and near the middle of its length and
diminishing towards its ends. The rollers are held in blocks fitted in guides in
the frame or frames holding them, screws or tapered wedges, or eccentrics moved
by worm gearing, or equivalents being arranged for adjusting the blocks and
rollers to suit the thicknesses or resistances of the plates to be bended.
Or instead of the rollers being adjustable in their frame or frames the beam may
be adjustable on the blocks at its ends by means of screws or equivalents applied
at those parts.
мирготошения I lave Dепан тастнегу.
I, JOSEPH BARROW, of the Firm of Thomas Shanks and Company, of the Union
Iron Works, Johnstone, in the County of Renfrew, North Britain, Engineer, do
hereby declare the nature of this invention and in what manner the same is to be
[Price 8d.]

page_text: performed, to be particularly described and ascertained in and by the following
statement, that is to say:-
My said invention relates to plate bending machinery of the kind in which two
lower horizontal rolls are combined with an upper roll which is adjustable verti-
cally, and my object is, by improved construction and arrangement, to make such
machinery capable of bending plates of large size, and of being easily adjustable
for bending plates of different thicknesses or resistances, without the use of packing.
When the rolls have to be of considerable length, say twenty feet and upwards,
to be suitable for bending large plates, the upper roll is liable to yield to the bend-
ing strain, if not made of a considerable diameter involving great cost and other
inconveniences. By my invention however I am enabled to use an upper roll of
moderate diameter; and in carrying it out I employ one or more pairs of small
rollers which are arranged to bear on the upper roll and to prevent it from yielding
upwards and laterally at the middle portion of its length.
And in order that my said invention and the manner of performing the same
may be properly understood I hereunto append two sheets of explanatory drawings
showing parts of a machine made with my improvements and designed for bend-
ing a plate of a length of thirty-five feet or less.
Figure 1 on Sheet 1 of the drawings is an elevation and Figure 2 is a sectional
plan of a part. Figure 3 on Sheet 2 is a sectional elevation of one of the housings,
with some details. Figure 4 is an enlarged elevation and Figure 5 is a vertical
section as at right angles to Figure 4 showing a pair of the small upper bearing
rollers, and other parts. In these drawings the same reference letters are used to
mark the same or like parts wherever they are repeated.
Figure 1 shows somewhat more than one half of the length of the machine.
The bending rolls which act directly on a plate consist of two lower rolls, A, and an
upper roll, B; but the latter is made of moderate diameter and considerably less
than would be necessary to enable it by itself to act without yielding at and near
the middle of its length when a plate is being passed through between it and the
lower rolls. Above the upper roll, B, there is a massive beam or girder, C, prefer-
ably of forged or cast steel, to which, in the example delineated are fixed two
frames, D, carrying, each, a pair of small rollers, E, arranged to bear on the upper
roll, B. For some purposes a single frame with its pair of rollers placed at the
middle of the girder, C, might be sufficient.
The girder, C, is by preference made of a circular section as shown with the view
of its resisting lateral as well as vertical strains. The middle portion of the
girder, C, is the largest in diameter, the end portions being made of tapering form
and terminating in flat ends, F, by means of which it is supported and adjusted.
Each end is jointed by a pin, G, to a pair of blocks, H, bolted together and fitted
to slide in vertical guides in the housing, J, being adjustable in the guides by means
of screws, K.
Each frame, D, carrying a pair of the small rollers, E, consists of two cheek
pieces bolted to the girder, C. at a distance apart to take the rollers between them,
and each is made with guides and fitted with bearing blocks, L, for the end journals
of the rollers, the bearing blocks being adjustable by means of screws, M. In
connection with each bearing block, L, (or it may be in connection with one of
each pair of blocks) an angularly moving pointer, N, is arranged to work over an
enlarged scale to show the extent to which the rollers are depressed for each bend-
ing operation. What is found suitable in any particular case and shown by the
pointer, N, can be recorded to serve as a guide for adjusting the rollers for any
future similar case. Each roller, E, is held up in place by a counterweighted
lever, P. (only shown as applied to one of the pair in Figure, 5) which is centered on
a bracket, Q, fixed to the girder, C, and has jointed to it a strap, R, which encircles
the roller in a groove formed at its middle. This arrangement allows of the adjust
ment of the rollers by the screws, M, and avoids projecting parts below the journals
of the rollers.

page_text: 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:-
In a plate bending machine having two lower rolls and an upper roll, the com-
bination of an upper roll of comparatively small diameter with one or more pairs
of adjustable bearing rollers in frames secured to a beam or girder, the parts being
constructed, arranged, and operating substantially as hereinbefore described and
as shown in the accompanying drawings.
1 ...
1 1000
EDMUND HUNT,
Applicant's Agent.