IMPROVEMENTS IN THE MANUFACTURE OF CHILLED ROLLS AND OTHER CYLINDRICAL OBJECTS, AND IN GRINDING-MACHINERY FOR THAT PURPOSE
Year: 1880

page_text: LETTERS PATENT to Frank Wirth, of the Firm of Wirth and Company, Patent
Solicitors, at Frankfort-on-the-Main, in the Empire of Germany, for an
Invention of "IMPROVEMENTS IN THE MANUFACTURE OF CHILLED ROLLS AND
OTHER CYLINDRICAL OBJECTS, AND IN GRINDING-MACHINERY FOR THAT
PURPOSE." A communication from Carl Herrmann Haubold, trading under
the Firm of C. G. Haubold, jr., of Chemnitz, in the Empire of Germany.
PROVISIONAL SPECIFICATION left by the said Frank Wirth at the Office
of the Commissioners of Patents on the 1st December 1880.
FRANK WIRTH, of the Firm of Wirth and Company, Patent Solicitors, at Frankfort
on the Main, in the Empire of Germany. "IMPROVEMENTS IN THE MANUFACTURE
OF CHILLED ROLLS AND OTHER CYLINDRICAL OBJECTS, AND IN GRINDING
MACHINERY FOR THAT PURPOSE." [A communication from Carl Herrmann Haubold,
trading under the Firm of C. G. Haubold, jr., of Chemnitz, in the Empire of
Germany.]
•
In making chilled rolls and other cylindrical objects it has hitherto been the
practice to first turn the bearings and necks in a lathe, then to rough-turn the
body of the roll by means of cutters, and after a third turning process to finish by
a grinding process.
According to the present Invention the second and third above named turning
processes are dispensed with, and in lieu thereof the rolls are subjected to a
grinding process. For this purpose grinding machinery of the following construction
is employed.
According to one arrangement the roll or cylindrical object is mounted in a
slightly elastic manner in adjustable bearings on pendant arms formed or fixed on
a sleeve or slide that can be caused to travel by means of a screw spindle along a
horizontal beam fixed on standards, so. that by imparting motion to the slide the
roll is caused to travel in the direction of its length in front of a large and rapidly
revolving grindstone. The neck or axis of the roll is connected by a coupling to a
shaft receiving rotary motion by means of a pulley and strap, so that the roll is
made to revolve as it travels along.

page_text: In order to determine the exact extent to which the surface of the roll is to be
ground away a horizontal bar is fixed in front of the extended lower ends of the
before mentioned pendant arms, so that the grinding operation can only continue
until the said arms come in contact with the said bar. By imparting to the said
bar any desired curved or otherwise shaped configuration a corresponding
configuration will be imparted to the roll. In order to prevent the vibration of
the roll while being ground a pair of rollers are kept in contact with its underside,
such rollers being carried in a frame pivotted to the one end of a lever, the other
end of which is acted on by a screw so as to keep the rollers pressed with more
or less force against the roll. The roll is pressed against the face of the grindstone
by a roller carried by a slide on a fixed bracket, which slide is advanced by a screw
spindle as the roll is reduced by grinding. The grindstone is also mounted on a
slide that can be advanced as the stone wears away. Instead of employing a roller
to press the roll against the grindstone a second adjustable grindstone may be
employed for this purpose, so that the roll is ground simultaneously on two opposite
sides.
According to another modification, the before described pendant arms carrying
the roll are mounted on a shaft carried by standards mounted on a slide that is
made to travel along a fixed bed by means of a screw spindle. The bed carries the
support for the slide that effects the pressing of the roll against the grindstone, as
also the lever carrying the rollers for steadying the roll, and the brackets carrying
the guide bar. In this arrangement, instead of suspending the arms carrying the
roll from a shaft above they may be reversed, that is, their lower ends may be
pivotted to the travelling slide or to adjustable supports upon the same, and the
roll be carried in their upper ends.
According to another modification of the last described arrangement the roll is
carried in forks in two adjustable supports upon the travelling slide, the forks being
made with inclined faces at the back, so that the pressure of the grindstone will
tend to push the roll up such inclined faces. This arrangement may be duplicated,
that is to say, the travelling slide may carry two rolls in forked supports, each
acted on by a grindstone on opposite sides of the slide.
According to another arrangement the roll is mounted in a vertical position in
bearings on a slide carried on a strong vertical standard, and the grindstone is
mounted in a horizontal position with its axis vertical; or there may be two
opposite grindstones so mounted, the standards carrying them being adjustable, as
in the previous arrangements. The roll may also be mounted with its axis
horizontally between grindstones on vertical axes, or the converse.
According to another arrangement the roll is mounted horizontally upon a
horizontal travelling slide, as in the previous arrangements, and the grindstone is
mounted in strong frames vertically above it, the height of the grindstone being
adjusted by means of screws acting on the sliding bearings of the grindstone
ax19.
According to another modification the grindstones are made to act with their
flat faces upon the roll instead of with their edges.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Frank Wirth in the Great Seal Patent Office on the 27th May
1881.
FRANK WIRTH, of the Firm of Wirth and Company, Patent Solicitors, at Frankfort
on the Main, in the Empire of Germany. "IMPROVEMENTS IN THE MANUFACTURE
OF CHILLED ROLLS AND OTHER CYLINDRICAL OBJECTS, AND IN GRINDING
MACHINERY FOR THAT PURPOSE." A communication from Carl Herrmann Haubold,
trading under the Firm of C. G. Haubold, jnr., of Chemnitz, in the Empire of
Germany.
In making chilled rolls and other cylindrical objects it has hitherto been the
practice to first turn the bearings and necks in a lathe, then to rough-turn the
body of the roll by means of cutters, and after a third turning process to finish by
a grinding process.
According to the present Invention the second, and third above named turning
processes are dispensed with, and in lieu thereof the rolls are subjected to a
grinding process. For this purpose grinding machinery of the following construction
is employed.
Fig. 1, on Sheet I. of the Drawings, shews a cross section, and Fig. 2 a front
view of one arrangement of such machinery. Two standards 1, 1, carry a strong
iron beam 2 having trunnions at 3, 3. This beam is of angular form at top and
planed, and upon it slides a sleeve 5 actuated by a screw spindle 4 which is rotated
alternately in contrary directions by fast and loose pullies 6, 6, 6, and open and
crossed bands, or it may be rotated by hand. The sleeve 5 has two pendant arms 7
having slots 8 near their lower ends, in which are sliding bearings 9 for the
trunnions 11 of the rolls or cylinders 15 to be operated upon. The bearings 9 can
be adjustable vertically, and are bedded on caoutchouc or springs 12 to give a
certain amount of elasticity. The two arms are extended beneath the bearings 9,
and these extensions 13 are guided by the bar 14, that is to say, the object of the
bar is to limit the extent to which the roll 15 can be pressed against the grindstone.
The configuration of the roll will correspond to that of the rail 14, according as this
be made straight or curved. The one trunnion of the roll 15 has a coupling 16 by
which it is connected to a shaft 17 receiving rotary motion by a pulley in the
same or the contrary direction to the grindstone. The grindstone 18 which
replaces the turning tools for preparatory turning process before mentioned
revolves either in fixed bearings or these may be adjusted by a screw 19 according
as the wear of the stone may require. The stone 18, which is very large, revolves
rapidly, and the roll 15 is pressed against it so as to be ground thereby. For
pressing the roll against the stone a roller 20 is provided mounted in a support 21
which can be moved to and fro by means of the screw 22 and hand wheel 23.
The bearings of the roller 20 are mounted in an elastic manner. The pressing of.
the roll against the stone 18 may, however, with great advantage be effected by
a second grindstone 18, Fig. 3. This is pressed against the roll 15 by a hand
lever 25 so as both to grind it and press it against the stone 18, so that the roll is
simultaneously ground on two opposite sides.
If the rolls to be ground are of small diameter as compared with their length
they will be subject to vibrations and bend, and will thereby become untrue. In
order to prevent this a small frame 26 is provided under the roll 15 having two
rollers 27 and pivotted at 28 to a lever 29, so that they can adjust themselves
against the surface of the roll in every position of the lever. This is pivotted.
at 30, and has at its end a screw 31. by which it can be raised or lowered so as to
bring the rollers 27 firmly against the roll so as to intercept the vibrations and
hold the roll quiet.

page_text: Figs. 4 and 5 shew another arrangement in which a table 33 is moved to and
fro by a screw on a bed 32 in a similar manner to a planing machine. On the
framing are two strong standards 1 carrying in bearings 3 a shaft 34. On this
shaft are fixed two pendant arms 7 which have adjustable bearings 9 in slots
carrying the trunnions of the roll 15, the bearings being bedded on caoutchouc or
other elastic material. An arm 36 fixed to the bed 32 carries a slide 21 capable of
being moved to and fro by means of the screw 22, and having the pressing roller 20
elastically connected to it, by means of which the roll 15 is pressed against the
grindstone 18. For preventing vibrations rollers 27 are pressed against the under
side of the rolls by means of a lever 29, whose one end is pivotted to the table, the
other end being adjusted by a screw 31. The bearings of the grindstone 18 can be
adjusted to compensate for wear. To prevent the roller from being ground off
beyond a certain thickness a bar 14 is fixed to the bed 32, and the lower ends of
the arms 7 in being made to bear against it limit the forward motion of the
roll.
The arrangements shewn at Figs. 6 and 7, Sheet II., is the same as that just
described, with the exception that the roll 15 is carried in arms 7 that are pivotted
at their lower ends on a shaft 34 carried by brackets 38 fixed to the table 33. The
pressing roller 20, slide 21, screw 22, as also the supporting rollers 27, and lever 29,
and adjustable grindstone 18, are the same as before.
In the arrangement shewn at Figs. 8 and 9, Sheet II., the roll is carried in
brackets 38 having forks, the back surfaces of which are inclined so that the roll
will be pressed backward by the grindstone 18 in the direction of the arrow 39.
In the arrangement at Figs. 10, 11, and 12, Sheet III., the roll 15 is carried in a
vertical position in a slide 33 working vertically up and down on the strong
vertical standard 32. The grindstone or grindstones 18 are arranged horizontally,
running with their vertical axes in strong brackets, which are adjustable with the
grindstone to compensate for wear.
Figs. 13 and 14, Sheet III., shew an arrangement in which the roll 15 is
arranged horizontally on a horizontal sliding table 33, while the grindstone 18 is
carried overhead by strong standards, in which the sliding bearings of the stone
are vertically adjustable by screws.
Fig. 15, Sheet II., shew an arrangement similar to that at Fig. 8, but in
duplicate, that is to say, the sliding table 33 contains two rolls 15 in forked
supports, one on each side thereof, each of which is acted upon by a grindstone 18,
so that the two rolls are ground simultaneously by the machine. In the
modification at Fig. 16, Sheet I., the grindstones 18 are arranged horizontally with
their axes vertical acting on opposite sides of the roll 15, also arranged horizontally,
and in the arrangement at Fig. 17 the grindstones are vertical and act with their
flat faces upon the roll. In all the Figures the same letters of reference indicate
parts having the same functions.
The above described machines all have the peculiar feature that the article to be
ground is moved to and fro while the grindstone revolves in stationary bearings;
in consequence of this, very large grindstones, having a diameter of as much as
8 feet, can be used.
Having thus described the nature of this Invention, and in what manner the
same is to be performed, as communicated to me by my correspondent, I claim,-
First. The herein described method of effecting the removal of the rough hard
skin of chilled and other rolls, or other cylindrical objects, entirely by grinding
instead of by preparatory turning by cutters.
Second. The construction of machinery for grinding chilled and other rolls,
wherein the grindstone revolves in stationary bearings, while the article to be
ground is caused to move to and fro in the direction of its axis, substantially as
herein described.
Third. The construction of grinding machinery herein described with reference
to Figs. 1 and 2, in which the article to be ground is carried in pendant swinging
arms, which are made to slide to and fro with the said article, and are guided

page_text: by a fixed bar, the grindstone being made to revolve on a stationary horizontal
axis.
Fourth. The construction of grinding machine herein described with reference to
Figs. 3, 4, and 5, in which the roll to be ground is carried by standards fixed on a
sliding table.
Fifth. The construction of grinding machinery herein described with reference to
Figs. 6 and 7 of the Drawings, in which the roll to be ground is carried in vertical
arms pivotted at their lower ends to a sliding table.
Sixth. The construction of grinding machinery, wherein the roll or other article
to be ground is carried on a sliding table in supports so arranged that on the
article being pressed too hard against the grindstone it can yield by sliding
backwards in its bearings, substantially as herein described with reference to Figs.
8 and 15 of the Drawings.
1
Seventh. The construction of grinding machinery herein described with reference
to Figs. 10, 11, and 12, wherein the roll to be ground is arranged in a vertical
position.
Eighth. The construction of grinding machinery, wherein the roll to be ground
is carried on a horizontal sliding table, while the grindstone is carried in overhead
bearings, substantially as herein described with reference to Figs. 13 and 14 of the
Drawings.
Ninth. The construction of grinding machinery, wherein two rolls are mounted
upon opposite sides of a sliding table so as to be ground simultaneously by two
opposite grindstones, substantially as herein described with reference to Fig. 15 of
the Drawings.
Tenth. In the various constructions of grinding machinery referred to in the
preceding claims, arranging the grindstones to act with their cylindrical surface
upon the roll or other object to be ground, the axis of the grindstone being either
parallel with or at right angles to the axis of the roll.
Eleventh. The construction of grinding machinery, wherein the grindstones are
made to act with their flat faces upon the rolls to be ground, substantially as
herein described with reference to Fig. 17 of the Drawings.
Twelfth. In the various constructions of grinding machinery referred to in the
preceding claims, the use of a fixed guide bar 14 for limiting the extent to which
the roll is acted upon by the grindstone, substantially as herein described.
Thirteenth. The use of supporting rollers 27 carried by adjustable levers 29 for
preventing the vibration of the roll to be ground, substantially as herein described.
Fourteenth. The herein described arrangement for pressing the roller or other
object to be ground against the grindstone, consisting of the pressing roller 20
carried in elastic bearings on a slide 21 actuated by a screw 23.
Fifteenth. Effecting the pressing of the roll or other object to be ground against
the fixed grindstone by a second grindstone mounted on a slide and actuated by a
screw or lever, substantially as herein described with reference to Fig. 3.
In witness, I, the said Frank Wirth, have hereunto set my hand and
seal, this Twenty fifth day of May, in the year of our Lord One thousand
eight hundred and eighty one.
FRANK WIRTH. (L.S.)