close

Вход

Забыли?

вход по аккаунту

?

Патент USA US3078093

код для вставки
Feb- 19, 1963
3,078,083
H. SCHREWE ET AL
MECHANISM FOR GUIDING A BURNER FOR CUTTING
METAL LENGTHS IN CONTINUOUS CASTING
Filed March 30, 1960
2 Sheets-Sheet 1
F/ G. 2
3a
//7 I/6/7/0l’5
Hans Sch/ewe
W/Me/m S/e?mac/rer
By f/ve/r af/omeys
MAM
Feb- 19, 1963
H. SCHREWE ETAL
-
MECHANISM FOR GUIDING A BURNER FOR CUTTING
Filed March 30, 1960
3,078,083
METAL LENGTHS IN CONTINUOUS CASTING
2 Sheets-Sheet 2
//7ve/7f0rs
Hans Sch/ewe
VV/Me/m S/e?macher
By their af/omeys
United States Patent
"ice
1
3,078,083
Fatentetl Feb. 19, 1953
2
3,078,083
MECHANISM FOR GUIDING A BURNER FOR
CUTTING METAL LENGTHS IN CONTIN
UOUS CASTING
Hans Schrewe, Duisburg-Ungelsheim, and Wilhelm Stell
macher, Dusseldorf, Germany, assignors to Marines
in the second and third quarters, ‘and great again in the
last quarter. In the case of hollow cast lengths, this
makes it possible to adjust the advance motion or feed,
in the region of the greatest depth of cut, so that the rear
5 portions of the cast length are also out part with certainty,
where rear cutting has heretofore not taken place.
While retaining the essentials of the pantograph prin
mann Aktieugesellschaft, Dusseldorf, Germany, a com
pany of Germany
Filed Mar. 30, 1960, Ser. No. 13,728
Claims priority, application Germany Apr. 4, 1959
4 Claims. (Cl. 266-23)
ciple and in order to do rear cutting, it is characteristic
of the invention that the burner is able to pivot or turn
10 about a ?xed point at least 90° and can be displaced to
suit the shape of the cast length’s surface, While the nozzle
articulated at the front end is turned about an axis trans
In the continuous-casting of metals, the cutting apart
of the ?nished casting into sections is of special impor
verse to the lengthwise axis of the burner to suit the shape
and limited distance.
of a carrier arm on which the burner is adapted to rotate
about an axis transverse to the lengthwise axis of the
of the cast length and to make rear-cutting possible.
tance, because this operation has to be carried outllrto suit
In the drawings FIG. l'is a plan view of an embodi
the speed of descent of the casting being performed simul 15
ment'according to the invention showing the front end
taneously with the casting, and usually within a certain
;
_
-
Various mechanisms have heretofore been employed
in which one or more burners, or a suitable burner plat
form, are coupled to a descending length of ‘casting. The
burner.
20
burner or burners in this case generally have had a rec
'
FIG; 2 is a diagrammatic view of the embodiment of
FIG. 1 taken with the casting in cross section, and show
ing the burner in different positions during the cutting
tiiinear and-uniform cutting path;v thatis, they are con
trolled or guided manually or automatically, regardless of
operation.
FIG. 3 is a diagrammatic view similar to FIG. 2 but '
whetherthe cast length is rectangular, or polygonal, or 25
of
‘another embodiment in which a servo motor turns
round. It is particularly with cast lengths of round shape
the burner about an axis transverse to the lengthwise axis.
that little or no consideration has heretofore been given
of the burner.
to the varying depth of cut; that is, the places where the
FIG. 1 shows the front end of the carrier arm 20' for
cut is deepest have been cut at the same speed as where
a burner 22 that is installed so ‘that it can turn about an
thetcut depth is least. . Thus the cutting apart of round
axis transverse to the burner axis. The supply of gas
cast lengths has'en'tailed dit?culties when working with 30 for
the burner is through or on the upper or lower side
the known means. .It was, for example, not possible to
of
the
carrier arm 20. The pivoted burner 22 is let into
cut apart hollow cast lengths with the known means
the support arm 20 so that it is able to turn, and has
when the inside diameter exceeded a certain dimension,
at its lower end a gear wheel 24 that meshes with a bevel
because it is particularly difficult to reach the rear parts
gear
wheel 28. This gear wheel in turn is mounted on
of a hollow length for this purpose. Therefore di?iculties
the front end of a shaft 26, which also carries a bevel
were'encountered during the cutting-apart operation and
gear wheel 39, that cooperates with a ring gear 32 that
such places usually had to be burned through separately.
is disposed ?xedly on the under side of the front crank
The subject of the invention is a linkage system for
drive
34, which engages with the carrier arm at the pivot
guiding the burner, particularly in continuous-casting
equipment, for the cuttingaapart of polygonal lengths,
round lengths, particularly polygonal hollow lengths or
round hollow lengths, the linkage system
burner or burner nozzleto suitthe external
cast length, and permitting “rear cutting”
length. This linkage system. furthermore
40
point 36. By suitably dimensioning the transmission ratio
of the drive elements that have been mentioned, and a
common drive, with practically equal lengths of the crank
guiding the
arms 34 and 38 (FIG. 2), a turning of the burner 22 is
shape of the
of the cast 45 obtained such that it runs at practically uniform spacing
from the surface of the cast length 11 (-FIG. 2). In
controls the
burner movement in such a way that in the region where
the depth of cut is greatest .the burner receives a slower
advancing motion, which motion increases in speed where
the cut depth is less.
‘In accordance with the invention the burner, at whose
front end the nozzle proper is mounted, is suspended on
a linkage system resembling a linked quadrangle or panto
graph arrangement and provided with two crank drives,
this case the crank arms move in the same direction dur
ing the cutting operation. However, it is so arranged
that in .its initial and ?nal positions a “rear cutting” is
effected. FIG. 2 also shows the different positions of
the carrier arm 20 and the burner 22 with respect to the
cast length.
FIG. 3 shows a different kind of construction of the
invention. The carrier arm 2% in this case is guided
the burner being fastened on a carrier arm or similar ele 55 slidably and pivotally about a rear point 202-. The
ment.
The two crank drives, which are driven inde
motion of the carrier arm is obtained by means of a
motor (not illustrated), and the guidance relatively to
pendently of one another, and whose freely movable ends
the surface of the cast length 11 is obtained by means
describe different radii, at the beginning of the cutting
of a crank drive 206, which is arranged so that it is able
operation have positions that differ from one another in
the frame formed by the linked parallelogram. Their 60 to turn on what is to be regarded as a stationary center
line 204. This drive engages by means of a longitudinal
directions of movement, in approximately the ?rst quarter,
slot 208 and associated rollers 210 with a guide pin (not
are in opposite directions. In the second and third quar~
illustrated) on the under side of the carrier arm 200.
ters they are approximately in the same direction and
At the front end of the carrier arm 260 is provided a
?nally in the fourth quarter are in opposite directions
again. These movements effect a guidance of the
burner nozzle so that it moves at a practically uniform
the burner nozzle so that it moves at a practically uniform
spacing from the surface of the cast length. In this way
the burner nozzle does not describe regular circular lines.
burner 212 that is able to turn about an axis transverse
to the burner axis, and that in the present case is turned
by means of a specially provided servo-motor 214 dis
posed on the carrier arm 200. The motion of the burner
212 could naturally also be produced by a connected rack
However, this arrangement permits the advance motion 70 drive (as described for FIG. 1), by the aid of the crank
i.e., speed of feed or traverse, to be suited to the depth
of cut. The speed will be great in the ?rst quarter, small
drive 206 and a suitable transmission ratio.
FIG. 3 shows the other different positions assumed ‘by
8,078,083
3
is evident that it is also possible to reach and cut off with
reliability the rear parts of a polygonal length, a round
length, or a round hollow length, or polygonal hollow
the lengthwise axis of the burner to a point at least
45° on either side of an extension of the lengthwise
axis of the carrier arm when viewed in plan, and
length.
drive means connected to at least one link having the
What is claimed is:
1. In an apparatus for the guidance of a cutting burner
form of a crank arm, said drive‘ means being for
moving the linkage system and thereby the carrier
during the cutting of sections transversely off a cast length
in a continuous casting process, the combination of;
arm and burner across the cast length, and
'rotating means, connected to the burner, mounted on
a system of linkage having at least two links, one of
them being a carrier arm, said links being movably
the carrier arm and'connected to said drive means,
connected together, at least two of said links being
movable each around separated ?xed points, said
points being on a line coincident with a lengthwise
axis of the carrier arm midway in its movement dur
4
a burner, having a nozzle on one end, and being carried
by .the carrier arm at the other end of the burner,
which is rotatable there about an axis transverse to
the burner nozzle of this embodiment during the cutting
operation. From the course of the cutting operation it
15
ing cutting, and
said rotating means being for rotating the burner
according to the position, of the carrier arm in .its
movement across the cast length during cutting,
the combination being so constructed and arranged that
during cutting the attitude of the burner nozzle to
the surface of the cast length is varied to permit
cutting of ?rst one rear portion of said length then
a burner having a nozzle on one end, and being carried
by the carrier arm at the other end of the burner,
‘a front portion and then another‘ rear portion, the
which is rotatable thereabout an axis transverse to 20
burner nozzle being kept, all the while, at substan
the lengthwise axis of the burner to a point'at least
tially a uniform distance from the surface of said
45° on both sides of an extension of the lengthwise
length,
'
axis of the carrier arm when viewed in plan, and:
whereby the rear as well as the front portions of the
drive means connected to at least one link for moving
cast length are cut with certainty.
the said system and thereby the carrier arm and 26
3. A combination according to claim 2 characterized
burner across the cast length, and
by the burner being arranged on‘ one end of the carrier
rotating means, connected ‘to the burner and to said
arm, a second crank arm being in the linkage system,
drive means, said rotating means being for rotating
with both crank arms being connected‘ to the carrier arm
the burner according to the position of the carrier arm
in its movement across the cast length during cutting, 30 at separated movable points each crank arm also pivot
ing around one of the separated ?xed points, and the ro
the combination being so constructed and arranged that
tating means comprising a servo-motor mounted on the
during cutting the attitude of the burner nozzle to
carrier arm.
the surface of the cast length is varied to permit
4. A combination according to claim 2 characterized
cutting of ?rst one rear portion of said length then
a front portion and then another rear portion, the 35 by the burner being arranged on one end of the carrier
arm, the carrier arm being slidably pivoted about one
burner nozzle being kept all the while at substantially
end of the crank arm which is pivoted about one of the
a uniform distance ‘from the surface of said length
?xed points, the rotating means comprising a servo-motor
whereby, the rear as well as the front portions of the
mounted on the carrier arm, and the connection of the
cast length are cut with certainty.
40 crank arm ‘to the carrier arm comprising a longitudinal
2. Apparatus for the guidance of a cutting burner dur
slot in the crank arm and associated rollers on the carrier
ing the cutting of sections transversely off a cast length
arm so that rotation of the crank arm causes the carrier
in a continuous casting process, said apparatus comprising
arm to slide over and pivot around the other ?xed point.
the combination of;
a system of linkage having at least two links movably 45
connected together, one of them being a carrier arm
and at least one having the form of a crank arm,
References Cited in the file of this patent
UNITED STATES PATENTS
at least two of the links being movable, each around
1,687,001
separated ?xed points in the linkage system said
2,054,847
Anderson _-__ ________ -_ Sept. 22, 1936
points being on a line coincident with a lengthwise 50
axis of the carrier arm midway in its movement dur
2,347,804
2,419,983
2,477,108
Anderson ____________ .. May 2, 1944
Anderson ____________ __ May 6, 1947
Young ______________ .._ July 26, 1949
ing cutting, and
Bishop _______________ .... Oct. 9, 1928
Документ
Категория
Без категории
Просмотров
0
Размер файла
370 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа