Improvements in and connected with Machinery for Rolling Welded or Solid-drawn Tubes.
Year: 1898

page_text: Date of Application, 1st Apr., 1898
faction Loft 31st Dec 1893-Accepted. 18th Feb., 1899
PROVISIONAL SPECIFICATION.
Improvements in and connected with Machinery for Rolling Welded
or Solid-drawn Tubes.
We, JOHN TANNAHILL and ANDREW EADIE, both of the Clydesdale Tube Works,
Rutherglen, in the County of Lanark, North Britain, Engineers, do hereby
declare the nature of this invention to be as follows, that is to say:
-
The said invention has for its object to improve the construction of machinery
for rolling tubes, so as to render such machinery more efficient, expeditious and
reliable in action. The improvements relate to the parts of the machinery for
rotating the mandril used, also to means for permitting the mandril to be speedily
withdrawn or moved back out of action and to means for readily adjusting the
position of the mandril.
In carrying out the invention there is provided the usual bench extending
or solid "billet is fed, and
out from the rolls to which the heated skelp"
the mandril which extends along this bench has its end next the rolls squared
or otherwise shaped to enter a corresponding socket in a bulb-like piece which
is fitted loosely on the end of the mandril and which acts on the inside of the
A part
tube being rolled when the mandril is rotated as hereinafter described.
of the mandril near the opposite or outer end is made square, or hexagonal or of
other suitable shape so that when the mandril is in position ready to be rotated
this squared part is in a correspondingly internally shaped sleeve which can be
made to rotate as hereinafter described, in bearings in a frame hinged at one side
to a bracket attached to the bench. The frame has attached to it at the hinged
side a counterweight and a handle or lever at the opposite side. The external
surface of the sleeve is made with friction teeth or other suitable frictional surface
and projects down through an opening in the bench, beneath which opening there
rotates a drum on a shaft driven by any suitable means and which drum has an
external frictional surface corresponding to that on the sleeve. The counter-
weight holds up the frame sufficiently to keep the two frictional surfaces from
contact with each other but when a tube is about to be rolled the attendant
depresses the handle or lever thereby overcoming the counterweight and bringing
the frictional surface on the sleeve in contact with that on the rotating drum.
The sleeve then rotates and owing to the action of its squared internal surface
on the correspondingly shaped part of the mandril therein the mandril is also
made to rotate and acts along with the rolls in the well known manner in rolling
the tube. During the rolling action the mandril is prevented from moving end-
stump" which is hinged to
ways by causing its outer end to bear on a stop or
an adjustable slide rest on the bench. The stop is held in position by the end
of a lever, centered on the slide rest, bearing on it, or by other suitable means
permitting of the stop being easily released which in the event of any hitch
occurring in rolling a tube will allow the mandril to move back and thus prevent
damage being done. The stop has also to be released and moved out of the way
of the mandril after each tube has been rolled to permit of the mandril being
"

page_text: withdrawn from the tube. In the event of the mandril becoming elongated by
heat transmitted from the heated tubes, so that its inner end' would not be in
the proper position in relation to the rolls the slide rest is adjusted so that the
stop is the necessary distance further out to allow for the additional length of the
mandril.
Dated this Thirty-first day of March 1898
EDMUND HUNT,
Applicants' Agent.
Improvements in and connected with Machinery for Rolling Welded
or Solid-drawn Tutes.
We, JOHN TANNAHILL, and ANDREW EADIE, of the Clydesdale Tube Works,
Rutherglen, in the County of Lanark, North Britain, Engineers, 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, that is to say:--
The said invention has for its object to improve the construction of machinery
for rolling tubes, so as to render such machinery more efficient expeditious and
reliable in action. The improvements relate to the parts of the machinery for
producing rotation of the mandril used, also to means for permitting the mandril
to be speedily withdrawn or moved back out of action and to means for readily
adjusting the position of the mandril.
And in order that the said invention and the manner of performing the same
may be properly understood we hereunto append a sheet of explanatory drawings
to be hereinafter referred to and showing the application of the invention in
rolling a tube from a heated skelp."
"
Figure, 1, is a plan, Figure, 2, a longitudinal vertical section; and Figure, 3,
a transverse vertical section showing a simple modification of our improved
machinery. In these drawings the same reference letters are used to mark the
same or like parts wherever they are repeated.
In carrying out the invention there is provided the usual bench, A, extending
out from the rolls, B, which feed the heated "skelp," C; and the mandril, D,
which extends along this bench has its end next the rolls squared (or otherwise
shaped) to enter a correspondingly shaped socket in a bulb-like piece, E, which
is fitted loosely on the end of the mandril, 1), and which acts on the inside of the
tube, C, being rolled when the mandril rotates. A part, F, of the mandril, D,
near the opposite of outer end is made square, or it may be hexagonal or of other
suitable shape so that when the mandril is in position ready to rotate this squared
part, F, is in a correspondingly internally shaped sleeve, G, which can be made
to rotate, as hereinafter described, in bearings in a frame, H, hinged at one
side to brackets, J, formed or fixed to the bench, A. The frame, H, has attached
to it at the hinged side a counterweighted lever, K, and a handle or lever, L,
at the opposite side. The external surface of the sleeve, G, is made with friction
teeth (or other suitable frictional surface) and projects down through an opening
in the bench, A. Beneath this opening there rotates a drum, M, on a shaft, N,
driven through a sprocket wheel, P, and pitch chain (not shown) or other suitable
gearing, from any suitable source. This drum, M, has an external frictional
surface corresponding to that on the sleeve, G. The counterweight, K, holds up
the frame, H, sufficiently to keep the two frictional surfaces from contact with
each other but when a tube, C, is about to be rolled the attendant depresses 5

page_text: the handle or lever, L, thereby bringing the frictional surface on the sleeve, G,
in contact with that on the rotating drum, M. The sleeve, G, then rotates and
owing to the action of its squared internal surface on the correspondingly shaped
part, F, of the mandril, D, therein the mandril is also made to rotate and acts
along with the rolls, B, in the well known manner in rolling the tube, C. During
the rolling action the mandril, D, is prevented from moving endways by causing
its outer end to bear on a stop or stump," Q, which is hinged to an adjustable
slide rest, R, on the bench, A. The stop, Q, is held in position by the end of a
lever, S, centered on the slide rest, R, bearing on the stop, Q, or by other suitable
means permitting of the stop being easily released which in the event of any
hitch occurring in rolling a tube, C, will allow the mandril, D, to move back
and thus prevent damage being done. The stop, Q, has also to be released and
moved out of the way of the mandril, D, after each tube, C, has been rolled
to permit of the mandril being withdrawn from the tube. In the event of the
mandril, D, becoming elongated by heat transmitted from the heated tubes so
that the bulb, E, on its inner end would not be in the proper position in relation
to the rolls, B, the slide rest, R, can be adjusted by turning a screwed spindle, T,
attached to the rest, R, and which spindle works in an internally screwed part, U,
formed in a bracket, W. When the rest has been adjusted the stop will be the
necessary distance further out to allow for the additional length of the mandril.
In rolling solid-drawn tubes the shape of the rolls (B) will be modified to suit
but the rotation of the mandril and the means
the shape of the solid billet
provided for permitting of the withdrawal and adjustment of the position of the
same will be the same as hereinbefore described.
"
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed, we declare that what
we claim is:-
1. In and connected with machinery for rolling welded or solid-drawn tubes
the combination and arrangement of parts for making the mandrel rotate for
permitting the mandril to be moved back out of action or withdrawn, and for
adjusting the position of the mandril, substantially as hereinbefore described and
as shown in the accompanying drawings.
2. In and connected with machinery for rolling welded or solid-drawn tubes,
forming a part of the mandril of a square or other suitable shape to work in a
correspondingly internally shaped sleeve turning in bearings in a hinged frame
provided with a counterweight and a handle, the sleeve having an external
frictional surface and there being beneath it a friction drum on a driven shape
substantially as and for the purpose herein before described.
3. In and connected with machinery for rolling welded or solid-drawn tubes,
providing a stop against which the outer end of the mandril bears, the stop being
hinged and held in position by a lever or equivalent, substantially as and for the
purposes hereinbefore described.
4. In and connected with machinery for rolling welded or solid-drawn tubes,
making the rest carrying the stop, adjustable substantially as and for the purpose
herein before described.
"
11
maith dox of December 1898.
EDMUND HUNT,
Applicants' Agent.