IMPROVEMENTS IN MACHINERY FOR CHANNELLING OR FINISHING RAILS
Year: 1884

page_text: I HEINRICH KOEHLER, manager, of Bochum, Prussia German Empire do hereby
declare the nature of the said invention for "IMPROVEMENTS IN MACHINERY FOR
CHANNELLING OR FINISHING RAILS" to be as follows:-
In some of the rolling mills of known construction the groove or channel is rolled
in the head by a roller extending into the finishing die groove this roller being set
in motion by friction alone; it is soon worn out because it must necessarily be of
comparatively small dimensions. In other constructions a vertical driving and
channelling roller is used to produce the groove in the head together with two
horizontal driving rolls which are of the same shape as the finishing rolls and are
In this latter case
mounted at the end of the series of rolls of an ordinary set.
the foot of the rail is supported on a projecting rim of one of the rollers so that
considerable friction and wear of the diegrooves or ribs takes place, moreover the
pressure for producing the groove in the rail head has to be borne by the bearings
in an axial line and this is disadvantageous.
To obviate these difficulties I use according to this invention a driving cylindrical
supporting roller and a driving top roller which serves for shaping or as a die-ruller
whilst deviating from the known arrangements. two lateral guide rollers are
shaped similarly to the finishing rollers for the purpose of avoiding the crushing
of the railweb when the top channel is rolled in-all the rollers are mounted in a
special frame and this constitute a separate set of finishing rollers which is used
for producing the channel after the rail has been brought to proper shape and
dimension by the usual rolling machinery.
Both driving rollers are directly driven the upper one has a rim or rib for
producing the groove or channel whilst the lower one upon which the foot of the
rail bears is quite cylindrical To enable these rollers to be directly driven their
journals are provided with suitable coupling pieces. The vertical rollers which
serve as guides laterally embrace the working rollera
The bearings for the latter are provided in bolsters in the usual manner whilst
bearings for the vertical rollers are provided in frames each connected with the
standard by four set screws. Keys serve together with set screws suitably to adjust
both the guide rollers and also the upper roller with relation to the bottom roller.

page_text: In producing the groove in the rail head the guide rollers receive their motion
by frictional contact with the rail.
Lastly it may be observed that if desired the shaping roller or die roller may be
at bottom and the cylindrical one at the top moreover the driving rollers may
both be placed horizontally, the arrangement shown in the drawing is however
preferable.
I HEINRICH KOEHLER, Manager, Bochum Prussia, Germany, do hereby declare
the nature of this invention for "IMPROVEMENTS IN MACHINERY FOR CHANNELING
OR FINISHING RAILS" and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement:-
In some of the rolling mills of known construction the groove or channel is
rolled in the head by a roller extending into the finishing die groove this roller
being set in motion by friction alone it is soon worn out because it must necessarily
be of comparatively small dimensione. In other constructions a vertical driving
and channelling roller is used to produce the groove in the head together with two
horizontal driving rolls which are of the same shape as the finishing rolls and are
mounted at the end of the series of rolls of an ordinary set. In this latter case
the foot of the rail is supported on a projecting rim of one of the rollers so that
considerable friction and wear of the diegrooves or ribs takes place, moreover the
pressure for producing the groove in the rail head has to be borne by the bearings
in an axial line and this is disadvantageous.
To obviate these difficulties I use according to this invention a driving cylindrical
supporting roller and a driving top roller which serves for shaping or as a die-roller
whilst deviating from the known arrangements two lateral guide rollers are shaped
similarly to the finishing rollers for the purpose of avoiding the crushing of the
railweb when the top channel is rolled in, all the rollers are mounted in a special
frame and thus constitute a separate set of finishing rollers which is used for
producing the channel after the tail has been brought to proper shape and dimension
by the usual rolling machinery.
In figure 1 of the annexed drawing this arrangement is shown in vertical section
through the double standard affording bearings for the rollers.
Figure 2 is a side view thereof. Both driving rollers A and B are directly
driven, the upper one B has the rim or rib a for producing the groove or channel
whilst the lower one A upon which the foot of the rail bears is quite cylindrical
To enable these rollers to be directly driven the journal F of the top roller and the
journal E of the bottom roller are provided with suitable coupling pieces. The
vertical rollers C which serve as guides laterally embrace the working rollers A
and B. The bearings for the latter are provided in bolsters e in the usual manner

page_text: whilst bearings for the vertical rollers C are provided in frames D each connected
with the standard G by four set screws. Keys b between e and D serve together
with the set screws a suitably to adjust both the guide rollers c and also the apper
roller B with relation to the bottom roller A.
In producing the groove in the rail head the guide rollers C receive their motion
by frictional contact with the rail.
Lastly it may be observed that if desired the shaping roller or die roller may be
at bottom and the cylindrical one at the top moreover the driving rollers may
both be placed horizontally, the arrangement shown in the drawing is however
preferable.
Having now particularly described and ascertained the nature of my said
Iuvention and in what manner the same is to be performed I declare that what
I claim is,
In a rolling-mill the arrangement of a driving bottom roll A and a driving
shaping top roll or die top roll B for producing the groove in the railhead in
combination with two Interal guide rollers C which laterally embrace the rail and
prevent its being crushed when the groove is rolled into it.