Improvements in Dies for Shaping Metal.
Year: 1890

page_text: Date of Application, 5th Mar., 1890
Complete Specification Left, 22nd Nov., 1890-Accepted, 27th Dec., 1890
PROVISIONAL SPECIFICATION.
Improvements in Dies for Shaping Metal.
I SAMSON Fox, of Leeds Forge, Leeds, in the County of York, Civil Engineer,
do hereby declare the nature of this invention to be as follows:-
In the Specifications of former Letters Patent, granted to me under date the
29th day of October, 1885, No. 13020, and the 1st day of December, 1886,
No. 15688, is described certain machinery or apparatus for the manufacture or
construction of frame plates for rolling stock.
My present invention has reference to a further development of the inventions
described in the Specifications above referred to by means of which I am
enabled to press, stamp, or bend metal plates to various forms, with or without
return flanges at one operation.
For this purpose I employ male and female dies of special construction arranged
in a suitable hydraulic or other press.
The female die is composed of moveable parts, the sides or walls being loosely
pivoted at or about the centre to a fixing, secured to the bottom plate of the
press, and may be lifted out if necessary on completion of the pressing or bending
operations and previous to the pressed or bent plate being withdrawn. Suitable
weights or springs are attached at or near the top of each side or wall to bring
them into a horizontal position.
The bottom or floor of the female die is raised by means of springs, and held
in position slightly overlapping and bearing for a short distance upon the sides
when in their horizontal position.
To the underside of the top plate or head of the hydraulic or other press, [
fix the male die (the outer configuration of which corresponds with the internal
configuration of the female die before described) which is provided with beveled
parts bolted together, and which on completion of the pressing or bending
operations may be released and withdrawn separately to permit of the coutrac-
tion of the metal due to cooling.
The plate to be operated upon after being heated is placed upon the raised
floor of the female die which by means of the hydraulic or other press is then
caused to approach the male die, and on coming into contact with it, is gripped
and held in position.
As the press continues to approach the male die forces the plate and floor of
the female die down, compressing the springs underneath. The lap of the floor
over the pivoted sides conveys motion to them causing their top part to bear
upon the underside of the outside edges of the plate bending it up to the required
angle or curve.
In cases where a return flange is required provision is made on the top part
of the sides or walls of the female die for turning the same either the whole
length or in such places as required.
On completion of the pressing stamping or bending operations, the bolts
holding the beveled parts of the male die together are released, and such parts
withdrawn, the pressure being gradually taken off, the contracted springs com-
mence to expand raising the floor and thereby forcing the finished article out of
the die which assumes the horizontal position again ready for the next operation.
Dated this 4th day of March 1890.

page_text: COMPLETE SPECIFICATION.
Improvements in Dies for Shaping Metal.
I SAMSON Fox of Leeds Forge Leeds, in the County of York, Civil Engineer
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 :-
In the Specifications of former Letters Patent granted to me under date the
29th day of October 1885 No. 13020, and the 1st day of December 1886,
No. 15688, is described certain machinery or apparatus for the manufacture or
construction of frame plates for rolling stock.
My present invention has reference to a further developement of the inventions
described in the Specifications above referred to by means of which I am enabled
to press, stamp or bend metal plates to various forms with or without return
Hanges, at one operation. For this purpose I employ male and female dies of
special construction arranged in a suitable hydraulic or other press.
The female die is composed of movable parts the sides or walls being loosely
pivoted at or about the centre to a fixing secured to the bottom plate of the
press, and may be lifted out if necessary on completion of the pressing or bending
operations and previous to the pressed or bent plate being withdrawn. Suitable
weights or springs are attached at or near the top of each side or wall to bring
them into a horizontal position.
The bottom or floor of the female die is raised by means of springs and held
in position slightly 'overlapping and bearing for a short distance, upon the sides
when in their horizontal position.
To the underside of the top plate or head of the hydraulic or other press, I
fix the male die (the outer configuration of which corresponds with the internal
configuration of the female die before described) which is provided with bevelled
parts bolted together and which on completion of the pressing or bending operations
may be released and withdrawn separately to permit of the contraction of the
metal due to cooling.
DESCRIPTION OF THE DRAWINGS.
Fig. 1 is a longitudinal central section through my improved dies before the
operation of shaping is commenced.
Fig. 2 is a cross section therefore.
Fig. 3 is a side elevation of the dies after the operation of shaping is complete.
Fig. 4 is a cross section thereof.
a are the loosely pivotted sides of the female die the upper parts a¹, a¹, of
which are shaped so as to make a return flange on the article under treatment.
The said sides are weighted at a to bring them into the horizontal position.
The sides a of female die are keyed on shafts 6 which work loosely in recesses
in fixings c. The recesses are so formed as to allow the sides a to be lifted away
after the operation is complete, d is the movable floor of the female die, e are
springs for raising the same. fis the male die composed of loose parts fastened
together by bolts and cotters 9, so that the parts may be easily disconnected
and withdrawn after the operation of shaping is complete, to allow the metal to
contract during cooling, is the metal plate under treatment. The plate to
be operated upon after being heated is placed upon the raised floor d of the
female die which by means of the hydraulic or other press is caused to approach
the male die and on coming into contact with it is gripped and held in position.
As the press continues to approach, the male die forces the plate and
floor d of the female die down, compressing the springs e underneath. The lap
of the floor over the pivoted sides a conveys motion to them causing their top
parts to bear upon the underside of the outside edges of the plate bending it
up to the required angle or curve. In cases where a return flange is required

page_text: provision is made on the top part of the sides or walls of the female die as at a²
for turning the same either the whole length or in such places as required. On
completion of the pressing, stamping or bending operations, the bolt g holding
the bevelled parts of the male die f together are released and such parts with-
drawn, the pressure being gradually taken off, the contracted springs e commence
to expand raising the floor and thereby force the finished article out of the
female die the sides a of which assume the horizontal position again ready for
the next operation.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is
First. In shaping metal, dies composed of movable parts combined and
operating substantially in the manner and for the purpose set forth.
Second. In shaping metal, a female die having a movable bottom and pivoted
sides substantially as set forth.
Third. In shaping metal, a male die composed of bevelled parts connected
together substantially as set forth.
Dated the 21st day of November 1890.