Improvements in Machines for Straightening and Polishing Round Metal Bars or Tubes.
Year: 1898

page_text: Date of Application, 1st Nov., 1898-Accepted, 23rd Dec., 1898
COMPLETE SPECIFICATION.
Improvements in Machines for Straightening and Polishing Round
Metal Bars or Tubes.
I, LATHAM H. BRIGHTMAN, of Millersburg, in the County of Holmes and
State of Ohio, United States of America, 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:-
The annexed drawings and the following description set forth in detail, one
mechanical form embodying the invention; such detail construction being but
one of various mechanical forms in which the principle of the invention may be
used.
In said annexed drawings, Figure I represents a side elevation of my improved
shaft straightening machine, illustrating the shaft and guide rails as broken
to bring one shaft clamp close to the machine; Fig. II, a transverse vertical
section of the machine on the line II-II in Fig. I; Fig. III, an enlarged
section of one of the roller supports, illustrating the roller and its bearings
turned with its axis parallel with the shank of the support; Fig. IV, an enlarged
edge view of a roller and its support, Fig. V is a plan of the rollers and their
bearings and Fig. VI, a diagrammatic plan view of two rollers and a shaft
between them.
The machine frame 1, is formed with two horizontal and longitudinally
aligned hearings, 2, in which two hollow trunnions, 3 and 4, which project
from the ends of a substantially rectangular flyer frame, 5, are journaled. One
trunnion has belt pulleys, 6, or other gearing for communicating rotary motion
to the flyer frame. The horizontal sides, 7, of the flyer frame are cut away
upon opposite faces, and said faces have inwardly widening grooves, 8, prefer-
ably-shaped in cross section. The flat shanks 9, of the roller supports 10,
have longitudinal slots, 11, through which the ends of bolts, 12, project, said
bolts having their heads and inner portions of their shanks fitting in the
grooves, and having nuts, 13, by means of which the bolts may be adjusted in
the grooves, and the slotted shanks may be adjusted upon the bolts. Screw:
bolts, 14, are threaded into the ends of the roller support shanks, and bear
with their outer ends against flanges, 15, formed by cutting away the hori-
zontal sides of the flyer frame. The shanks and supports are adjusted towards
and from the axial line of the flyer frame by these bolts. The shanks of the
roller supports project from plates, 16, and the flat faces of bearing blocks, 17,
in which the rollers are journaled, bear against said plates and are swiveled
upon the same by means of pivot studs, 18. The plates 16 are formed with
segmental slots, 19, concentric with the pivot studs, and screw bolts, 20, project
through said slots and into the flat faces of the bearing blocks, for the purpose
of clamping the bearing blocks in their adjusted swiveled positions. The
bearing blocks have removable boxes, 21, in their ends, secured in place by
caps 22. The trunnions 23, of rollers, 24, having concave peripheries, are
journaled in said boxes. The concave peripheries of the rollers are formed

page_text: on the arc of a circle in cross section. Guide blocks, 25, are secured upon the
corners of the bearing blocks which present towards the feed end of the flyer
frame and have their inner faces outwardly beveled and concave, so as to guide
the end of the shaft or round bar to the roller. The roller supports are secured
to the sides of the flyer frame so as to project alternately from opposite sides,
excepting at the discharge end of the frame, where two rollers are directly
opposed. The roller supports are so adjusted in the flyer frame that the rollers
will project so far within the path of the shaft that they may deflect the latter
just as much as it will bear and again return to a perfectly straight line, the
degree of such deflection being governed by the thickness of the shaft and the
elasticity or springiness of the metal in the same. A frame, 26, is secured to
the end of the discharge trunnion of the flyer frame, and has two opposed
pads, 27, of wood or similar material, which bear against the bar or shaft as
it leaves the straightener,. and serve to polish the same. Clamps, 28 and 29,
travel upon tracks, 30, and have means for centering their jaws with the axial
line of the flyer frame, according to the thickness of the bar or shaft. A steady-
rest, 31, is preferably provided at the feed end of the inlet trunnion of the
flyer frame.
In practice, after the rollers have been adjusted in their proper positions
as to distance from the axis of the flyer frame and angle to the longitudinal
axis and plane of the frame, according to the thickness of the shaft or round
bar and the rate of feed for the latter through the machine, the flyer frame is
started to rotate and the end of the shaft is inserted at the feed end of the
flyer frame, having previously been centered and clamped in the supporting
clamp. As soon as the revolving rollers begin to act upon the shaft, they will
feed the latter through the machine, when it may be secured in the other clamp
by the end leaving the frame. The straightening of the shaft or bar will be
accomplished by the continuous deflection from all sides of the shaft by the
alternating rollers. The contact of the concave peripheries of the revolving
rollers in the rotating frame will produce varying peripheral speeds at the
various portions of their peripheries, thus causing slipping of certain portions
of the peripheries upon the surface of the shaft. This action will smooth and
polish the shaft, particularly at the directly opposed set of rollers, which polish
will be still further finished by the polishing device upon the discharge trunnion.
As the groove or concave of the peripheries of the rollers is formed on the seg-
ment of a circle, and the rollers are placed at an angle to the shaft according
to the diameter of the same, which roller will have a segmental line of contact
with the shaft. This will prevent all gouging out or breaking of edges of
flaws or cracks which might be found in the surface of the shaft, and will admit
of such flaws and cracks being smoothed over. When I use the term shaft
or bar, all round bars are included, whether solid or hollow, and whether formed
with a small inner bore or in the shape of an actual pipe or tube.
Other modes of applying the principle of my invention may be employed for
the mode herein explained. Change may therefore be made as regards the
mechanism thus disclosed, provided the principles of construction set forth
respectively in the following claims are employed.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is:-
1. In a machine for straightening round bars of metal, the combination with a
revolving flyer frame having hollow trunnions, of freely revolving rollers
arranged to alternately project from opposite sides of said frame and having
concave peripheries bearing against the bar at an angle to the same, substantially
as set forth.
2. In a machine for straightening round bars of metal, the combination with a

page_text: revolving flyer frame having hollow trunnions, of freely revolving rollers
arranged to alternately project from opposite sides of said frame and having
concave peripheries bearing against the bar at an angle to the same and pro-
vided with means for adjusting them towards and from the axis of the flyer
frame, substantially as set forth.
3. In a machine for straightening round bars of metal, the combination with
a revolving flyer frame having hollow trunnions, of freely revolving rollers
arranged to alternately project from opposite sides of said frame and having
concave peripheries and provided with means for adjusting them in planes
transverse to the plane of and substantially parallel to the axis of the revolving
flyer frame, substantially as set forth.
4. In a machine for straightening round bars of metal, the combination with
a revolving flyer frame having hollow trunnions, of rollers arranged to alter-
nately project from opposite sides of said frame and having concave peripheries
bearing against the bar at an angle to the same, and a pair of similarly con-
structed and set rollers arranged directly opposite each other at the delivery
end of the frame, substantially as set forth.
5. In a machine for straightening round bars of metal, the combination with
a revolving flyer frame having hollow trunnions, of rollers arranged to
alternately project from opposite sides of said frame and having concave
peripheries bearing against the bar at an angle to the same, and guide blocks
having concave beveled faces and arranged at the points of feed to each roller,
substantially as set forth.
6. In a machine for straightening round bars of metal, the combination of
straightening rollers, substantially as set forth.
7. A machine for straightening round bars of metal, substantially as set
forth.
1
تيمم
1
A
1000
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicant.