Improvements relating to Tube Rolling or the like Mills or Machinery.
Year: 1897

page_text: Improvements relating to Tube Rolling or the like Mills or
Machinery.
I, WILLIAM PILKINGTON, of Sandfields, Erdington, near Birmingham, Steel
Tube Manufacturer, do hereby declare the nature of this invention to be as
follows:-
This invention consists of improvements relating to tube rolling or the like
mills or machinery, my object being to provide simple and effective mechanical
means for automatically returning the tube use or the like through the rolls and
to slightly revolve the same during such return movement.
In the application of my invention in one convenient manner to a tube rolling
mill having a pair of rolls mounted over and under each other in the ordinary
manner, but each with one half or a portion of the circumference of a less radius
than the other portion, I employ a pair of returning rolls also mounted over and
under each other, but upon shafts which are inclined or set at an angle, other than
à right angle, with the centre line of the mandrel on which the tube is rolled.
The distance between the centres of the operating rolls and the inclined returning
rolls is such as to allow sufficient space between them to receive the full length
of the tube or use operated upon.
An eccentric and rod or other suitable driving connection is provided between
one of the operating rolls and the corresponding returning rolls, or both operating
rolls may be so connected with the returning rolls.
Such driving connection between the rolis is so arranged that the continual
revolution of the operating rolls will produce but an oscillatory movement of
the returning rolls, or a forward and return movement within a limited are of a
circle corresponding with their complete circumference. Thus on each complete
revolution of the operating rolls I obtain a forward and return movement of the
inclined rolls.
At their adjacent surfaces the returning rolls are caused to grip the mandrel
and the connecting mechanism is so arranged that when the portions of the
operating rolls, having the smaller radii, move adjacent to each other during their
revolution, thus releasing the tube, the returning rolls are caused to force back the
tube and mandrel until the whole of the former is again on the admission side of
the operating rolls and ready for a further reducing action. During such return
movement, owing to the inclined arrangement of the rolls, the tube is also slightly
turned or revolved, preferably through one half a revolution and thus ensuring
that the whole tube surface shall be efficiently operated upon by the rolls.
I do not limit the application of my invention to tube rolling mills but adapt

page_text: the same to mills or rolling machinery for other services making such modifica-
tions as may be necessary to meet the requirements of such services.
Dated this 10th day of inmil 1807
-MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham, Agents for the 'Applicant.
Improvements relating to Tube Rolling or the like Mills or
Machinery.
I, WILLIAM PILKINGTON, of Sandfields, Erdington, near Birmingham, Steel
Tube Manufacturer, 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 consists of improvements relating to tube rolling or the like
mills or machinery, my object being to provide simple and effective mechanical
means for automatically returning the tube use, billet, or the like through the
rolls and to slightly revolve the same during such return movement.
In the two accompanying sheets of explanatory drawings to be hereinafter
referred to.-
Figure 1 is a sectional elevation and Figure 2 a plan of tube rolling appliances
as arranged in accordance with my invention.
In the application of my invention to a tube rolling mill having a pair of rolls such
as A and B mounted over and under each other in the ordinary manner, but each with
one half or a portion of the circumference of a less radius than the other portion, I
employ a pair of returning rolls as C and D also mounted over and under each
other, but upon shafts E and F which are inclined or set at an angle, other than a
right angle, with the centre line of the mandrel G on which the tube is rolled.
The distance between the centres of the operating rolls A and B and the inclined
returning rolls C and D is such as to allow sufficient space between them to receive
the full initial length of the tube or billet H operated upon.
An eccentric and rod or other suitable driving connection is provided between
one of the operating rolls and the corresponding returning rolls, or both operating
rolls may be so connected with the returning rolls as illustrated in the drawings,
where J J are the eccentrics, and K K the rods which are connected to the
cranks L L¹.
Such driving connection between the rolls is so arranged that the continual
revolution of the operating rolls A and B will produce but an oscillatory move-
ment of the returning rolls C and D, or a forward and return movement within
a limited arc of a circle. Thus on each complete revolution of the operating rolls
I obtain a forward and return movement of the inclined rolls.
At their adjacent surfaces the returning rolls C and D are caused to grip the
mandrel G and the connecting mechanism is so arranged that when the portions
of the operating rolls having the smaller radii, move adjacent to each other during
their revolution, thus releasing the tube, the returning rolls are caused to force
back the tube and mandrel ready for a further reducing action. During such
return movement, owing to the inclined arrangement of the rolls, the tube is also
slightly turned or revolved, preferably through one quarter of a revolution, thus
ensuring that the whole tube surface shall be efficiently operated upon by the rolls.
The extent of the return movement of the tube on each revolution is preferably

page_text: limited by the stop M; the rolls C and D can then slip over the mandrel G
without imparting any motion to the same.
I do not limit the application of my invention to tube rolling mills but adapt
the same to mills or rolling machinery for other services making such modifica-
tions as may be necessary to meet the requirements of such services.
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:-
1. In combination with tube rolling or like mills or machinery, means for auto-
matically returning the tube billet or the like through the rolls, substantially as
described.
2. In combination with tube rolling or like mills or machinery, means for
automatically returning the tube billet or the like and for partially revolving
the same during such return movement, substantially as and for the purpose
described.
3. In tube rolling or like mills or machinery, the combination and arrangement
of parts substantially as and for the purposes described and as illustrated.
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham, Agents for the Applicant.