Improvements in the Manufacture of Doubly Bent Angle, Channel, and like Bars, and in Tools or Apparatus therefor.
Year: 1896

page_text: This Print is in accordance with the Original Specification as it stands after
Amendment (under Section 11 of the Patents, &c. Act, 1883) as required by
the decision of the Comptroller General of the 30th day of December 1897.
Date of Application, 16th Oct., 1896
Complete Specification Left, 10th Apr., 1897-Accepted, 3rd July, 1897
PROVISIONAL SPECIFICATION.
Improvements in the Manufacture of Doubly Bent Angle, Channel, and
like Bars, and in Tools or Apparatus therefor.
We, JOHN YOUNG SHORT and JOSEPH SHORT, of Pallion, and 13, John Street,
Sunderland, in the County of Durham, Ship-builders, do hereby declare the nature
of this invention to be as follows:-
This invention has for object to bend doubly, angle, channel and like bars in
such a manner that their flanges, except where they are doubly bent or stepped
shall remain flat and shall not become buckled as has heretofore been the case.
For this purpose according to this invention such bars are doubly bent or stepped
by means of suitably formed dies mounted in a press or stamping-machine, which
may be of any appropriate construction and operated by any suitable power.
In a single pair of such dies adapted for doubly-bending angle-bars, the operat-
ing surface of the male die is of the same shape as the inner surface of the
angle-bar to be bent except that on one of its faces it carries a projection which is
equal in breadth to, but is of less length than, the face on which it is carried, and
the female die is made with a vee-groove of the same shape as the outer surface of
the angle-bar except that opposite to the said projection it has in one of its faces a
depression, the depth of the depression and the thickness of the projection being
such that when the dies are forced towards each other the desired flange of the
angle-bar will be doubly bent, stepped or joggled as required, the depression ex-
tending beyond the projection to an extent equal to, or slightly greater than, the
thickness of the said flange.
Dies for doubly bending angle-bars according to this invention are sometimes
made double so that by means of one set of dies double bends, can he made in either
the right or the left hand flange of an angle-bar as desired. A double male die
of this kind consists of a block comprising two portions each similar to the single
male die hereinbefore described and having their plane operating surfaces adjacent
but separated by an acutely wedge-shaped recess; the corresponding double-female
die similarly consists of a block comprising two portions, each similar to the single
female die herein before described and having their plane operating surfaces,
adjacent but separated by a prominence corresponding in shape to the aforesaid
recess but sufficiently smaller to allow for the thickness of flange of the angle-bar
to be bent. Either of these double dies (preferably the stationary one) may be
provided at its sides with suitable extensions to guide the dies in their relative
movements.
Dies for doubly-bending channel-bars according to this invention are formed
in a similar manner, the male die being adapted to fit snugly in a channel-bar to
be operated on except that a portion of its front face projects beyond the adjacent

page_text: portion and is adapted as in the case of the angle-bar dies, to form the required
double bend or step in co-operation with a corresponding depression in the bottom
of the female die, which, except as regards this depression, is formed to receive
the channel-bar snugly and may be provided at its sides with extensions to guide
the male die.
It will be obvious that the projections and depressions hereinbefore mentioned
may be made either by suitably forming the corresponding portions of the dies
or by attaching separate pieces to dies of simpler form.
Dated thin 15th down of Datahan
1906
R. E. P. CRAVEN,
Registered Patent Agent,
22, Victoria Chambers, South Parade, Leeds,
Agent for the Applicants.
Improvements in the Manufacture of Doubly Bent Angle, Channel, and
like Bars, and in Tools or Apparatus therefor.
We, JOHN YOUNG SHORT and JOSEPH SHORT, of Pallion, and 13, John Street,
Sunderland, in the County of Durham, Shipbuilders, 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 has for object to bend doubly, angle, channel and like bars in
such a manner that their flanges, except where they are doubly bent or stepped
shall remain flat and shall not become buckled. For this purpose according to this
invention such bars are doubly bent stepped or joggled by means of suitably formed
dies as hereinafter described, mounted in a press or stamping machine which may be
of any appropriate construction and operated by any suitable power.
In a single pair of such dies adapted for doubly bending angle-bars, the operat-
ing surface of the male die is of the same shape as the inner surface of the angle
bar to be bent except that on one of its faces it carries a projection which is equal
in breadth to, but is of less length than the face on which it is carried, and the
female die is made with a vee-groove of the same shape as the outer surface of
the angle-bar except that opposite to the said projection it has in one of its faces a
depression, the depth of the depression and the thickness of the projection being
such that when the dies are forced towards each other the desired flange of the
angle-bar will be doubly bent, stepped, or joggled as required, the depression ex-
tending beyond the projection to an extent equal to, or slightly greater than, the
thickness of the said flange.
Dies for doubly bending or joggling angle bars according to this invention are
sometimes made double so that by means of one set of dies, double bends can be
made in either the right or the left hand flange of an angle-bar as desired. A
double male die of this kind consists of a block comprising two portions each
similar to the single male die herein before described and having their plane operat-
ing surfaces adjacent but separated by an acutely wedge-shaped recess. The
corresponding double female die similarly consists of a block comprising two
portions, each similar to the single female die hereinbefore described and having
their plane operating surfaces adjacent but separated by a prominence correspond-
ing in shape to the aforesaid recess but sufficiently smaller to allow for the
thickness of flange of the angle bar to be bent. Either of these double dies
(preferably the stationary one) may be provided at its sides with suitable
extensions to guide the dies in their relative movements.

page_text: Dies for doubly bending channel-bars according to this invention are formed in a
similar manner, the male die being adapted to fit snugly in a channel-bar to be
operated on except that a portion of its front face projects beyond the adjacent
portion and is adapted, as in the case of the angle-bar dies, to form the required
double bend, step, or joggle in co-operation with a corresponding depression in
the bottom of the female die, which, except as regards this depression, is formed
to receive the channel-bar snugly and may be provided at its sides with extensions
to guide the male die.
It will be obvious that the projections and depressions hereinbefore mentioned
may be made either by suitably forming the corresponding portions of the dies or
by attaching separate pieces to dies of simpler form.
In order that the invention may be properly understood, we shall now describe
with reference to the accompanying drawings, examples of dies constructed
according thereto.
Figs. 1 and 2 are respectively end and side elevations of a pair of single dies.
for doubly bending or joggling angle-bars, and Fig. 3 is a plan of the female die.
The male die is formed with an operating surface 1 of the same shape as the
inside of the angle-bar to be operated on except that on one side thereof there is a
projecting piece 2 which is secured in position by screws 3 and is of a thickness
equal to the joggle to be given to the angle-bar. The female die 4 is formed
centrally and longitudinally with a vee-groove, the sides 5, 6 of which are adapted
to fit the outside of the angle-bar except that on the side there is a projecting
piece 7 secured by screws 8 and of a thickness equal to the required joggle. The
dies are secured in position to the movable ram and bolster of the press or stamping-
machine by means of bolts passing through holes 9 and in such a position that
when the dies are brought towards each other to the necessary extent, there will
be sufficient space between the projection 2 on the male die and the projection 7
on the female die for the formation of the required double bend or joggle.
Figs. 4 and 5 are respectively an end elevation and a side elevation of a pair of
double dies for bending angle-bars.
The female die 10 is formed with a central wedge-shaped block 11 having plane
operating surfaces 12 and 13 with which other surfaces 14 and 15 of the block
make angles equal to the external angles of the angle-bars to be treated. At the
same end of the block 11 there are on the surfaces 14 and 15 projecting pieces 16
and 17 of a thickness equal to the depth of the required joggle.
The male die 18 has a central and longitudinal groove 19 of a width sufficiently
greater than the block 11 on the female die to allow of the insertion, between its
faces 20 and 21 and the faces 12 and 13 of the block 11, of the flanges of two of
the angle-bars to be treated; with the faces 20 and 21, faces 22 and 23 form such
angles as to adapt the said faces to fit the insides of the angle-bars. At one end
of the die there are on the faces 22 and 23 projecting pieces 24 and 25 of a thick-
ness equal to the required joggle. On the outside edges of the surfaces 22 and 23
are formed projections 26 and 27 adapted to guide the sides 28 and 29 of the female
die during the finishing part of the bending operations.
Figs. 6 and 7 are respectively an end elevation and a side elevation of a pair
of dies for doubly bending or joggling channel-bars. The male die has a projecting
block 30 with a plane under surfaee 31 which, with the sides 32 and 33 of the
block 30, forms the same configuration as the bottom and inner sides of a channel-
bar to be treated. The under surface 31 has at one end a projecting piece 34 of a
thickness equal to the required joggle; the two sides 35 and 36 of the block 30
are made parallel for the purpose of guiding it. The female die 37 has a longitu-
dinal groove, whose bottom 38 and sides 39 and 40 are adapted to fit the outside
of a channel-bar, the sides 39 and 40 being also adapted to co-operate with the
sides 35 and 36 in guiding the male die. At one end of the die thère is on
the bottom surface 38 a projecting piece 41 of a thickness equal to the required
joggle and arranged to act in conjunction with the piece 34 in the formation
thereof.

page_text: It will be seen that during the first part of the action of doubly bending or
joggling one flange of an angle-bar with dies such as shown in Figs. 1 to 5 in-
clusive, the other flange is not pressed by and between the dies and can therefore
yield in conformity with the bending, and that on the completion of the operation
any improper distortion caused in the last mentioned flange will be removed by
its being pressed by and between the said dies. In doubly bending a channel-bar,
the flanges fit between the male die and the female die and are thus prevented from
being buckled. Thus it will be seen that the construction and arrangement of
the dies are such that no separate means are necessary for fixing the angle or
channel bars in position for bending or joggling and that during the completion
of the bending or joggling operation, both flanges in the case of an angle iron, and
the two flanges and connecting web in the case of a channelled bar are confined
between the adjacent surfaces of the dies so that all parts of the bent or joggled
bar will be pressed to the required finished shape at one pressing operation.
Furthermore by the use of double dies such as shown in Figs. 3 and 4, either
flange of a bar can be bent or joggled at will by simply moving the bar from one
set of die faces to the adjacent set without having to take the bar from between
the dies and replace it in the reversed position, thereby saving time and labour.
Having now particularly described and ascertained the nature of the said in-
vention and in what manner the same is to be performed we declare that we do
not claim broadly the bending or joggling of angle bars and the like between dies
one of which is formed with a projection and the other with a corresponding
depression but what we do claim is:-
1. The hereinbefore described method of doubly bending or joggling angle and
channel bars whereby their flanges, except where they are doubly bent, or joggled
are rendered flat and free from distortion as set forth.
2. For doubly bending or joggling angle bars, dies constructed- arranged and
operating substantially as herein before described with reference respectively to
and shown in Figs. 1, 2, and 3 and in Figs. 4 and 5 of the drawings annexed so
that one or other of the flanges of angle iron can be doubly bent or joggled and
both flanges be finally pressed to the required finished shape at one operation, as
set forth.
3. For doubly bending or joggling channelled bars, dies constructed, arranged
and operating substantially as described with reference to and shown in Figs. 6
and 7 of the drawings annexed.
D.
101
J
A
1 1005
R. E. P. CRAVEN,
Registered Patent Agent,
22, Victoria Chambers, South. Parade, Leeds,
Agent for the Applicants.