Metal into Tubular or other Forms. PRESS
Year: 1885

page_text: Metal into Tubular or other Forms.
.
I WILLIAM DANIEL ALLEN of the Bessemer Steel Works, Sheffield, in the
County of York, Steel Manufacturer do hereby declare the nature of my invention
FOR STAMPING OR PRESSING
for "IMPROVEMENTS IN HYDRAULIC MACHINERY
METAL INTO TUBULAR OR OTHER FORMS " 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 reference to hydraulic machines used for stamping or pressing
metal into tubular or other forms such as hoops, linings for cylinders and guns,
cylinders for boilers, vessels for containing gases, etc, by the well known and
practised system of stamping or pressing into the required shapes metal discs ọr
plates, forcing such discs or plates through holes or into dies, and giving successive
pressings and annealings until the required form has been produced. For this
purpose I employ a hydraulic machine or press having a main cylinder and a
smaller cylinder or cylinders the main or larger cylinder working mouth down-
wards and being capable of giving the great pressure required in the shaping or
pressing operation. I will assume that two smaller cylinders are used. These two
smaller cylinders are placed mouth upwards so as to work in an opposite direction
to the main cylinder and are of a size and power capable of giving sufficient force
to relieve or free the mandril from the tube, or other work in hand after each
stamping or pressing operation, and also to raise the rams, crosshead, mandril and
other parts into the return position for the next stamping or pressing operation,
thereby maintaining a reciprocating motion. Each cylinder has a separate ram
and each of the rams is fitted into a strong crosshead, all the rams with the cross-
head thus working as one piece. This arrangement of cylinders, rams, and
crosshead forms an excellent guide for the descending mandril and ensures its
working in a true vertical position and concentric with the die.
The machine is constructed with threo columns or pillars only, instead of four as
usual, by which arrangement additional space is obtained for the metal to be
operated upon, and greater facilities are afforded for getting at the mandrils and
Odies and the work in hand: besides which equal division of the strain upon the
pillars is ensured,

page_text: Referring to the accompanying sheet of illustrative drawings, Fig. 1 is a
sectional elevation of a machine embodying my improvements.
Fig. 2 is a side elevation shewing the main cylinder in section.
Fig. 3 is a plan.
A is the main cylinder, B the large ram, CC are the two smaller cylinders,
DD the two smaller rams, E is the crosshead, F F are the pillars or columns, G is
the mandril, and H the die.
It is to be noted that, as well understood, the mandril and die may be varied to
suit the kind of work to be produced.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I desire to have it
clearly understood that I do not lay any general claim to the use of a hydraulic
press for shaping metal, but I declare that what I claim is
1. The use for stamping or pressing metal to tubular or other forms as set
forth of apparatus comprising a hydraulic ram for giving the forward movement
to the mandril in conjunction with another hydraulic ram or rams for disengaging
or freeing the mandril from the work and returning it (the mandril) and other
parts into position for the next operative stroke substantially as described.
2. The improved hydraulic machine for stamping or pressing metal to tubular
or other forms as set forth constructed arranged and operating as. described with
reference to and shewn in the drawings.