Title of Invention

AN APPARATUS FOR DEBURRING WITH PLANING TOOLS A METAL STRAND CUT TO LENGTH BY GAS CUTTING

Abstract An apparatus is described for deburring with planing tools (7) a metal strand (1) cut to length by gas cutting, which planing tools are adjustably held each for themselves transversally to the metal strand (1) in a support (6), and with a drive for the relative advancing movement of the planing tools (7) relative to the metal strand (1) which is cut to length. In order to provide advantageous deburring conditions it is proposed that the annular support (6) comprises at least two sets of planing tools (7) which are radially adjustable to the metal strand (1) cut to length, which sets are arranged behind one another in the longitudinal direction of the metal strand (1) cut to length and which are staggered against each other set by set.
Full Text 1. Field of the Invention
The invention relates to an apparatus for deburring with planing tools a metal
strand cut to length by gas cutting, which planing tools are adjustably held each
for themselves transversally to the metal strand in a support, and with a drive
for the relative advancing movement of the planing tools relative to the metal
strand which is cut to length.
2. Description of the Prior Art
When metal strands produced by continuous strand casting are cut to length by
gas cutting, a cutting burr is produced on the exit side of the cutting jet which
causes a disturbance in further processing the cut metal strands and is there-
fore removed. It is therefore known for this purpose in the case of plate slabs,
i.e. metal strands with a substantially rectangular cross section, (DE 30 37 320
C2) to arrange several planing tools transversally to the longitudinal direction of
the plate slabs on a carriage displaceable in the longitudinal direction of the
plate slab and to advance each of them to the bottom side of the plate slab
having the cutting burr in order to move the carriage by a forward drive after the
advancement of the planing tools against the plate slab outside of the cutting
burr and to remove said cutting burr according to the advancement of the plan-
ing tools by machining. The use of this known apparatus for deburring plate
slabs is not suitable for the deburring of billets obtained by the cutting to length
of metal strands with a round cross section.
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In another known apparatus for deburring a metal strand cut into length by gas
cutting (EP 0 671 230 A1), the planing tools are provided on piston bodies
which are held in a radially displaceable manner in a common tubular cylinder
body and can be pressurized by means of compressed air in order to ensure
the advancement of the planing tools against the metal strand under a prede-
termined force. The feeding of the planing tools occurs via radial displacement
of the cylinder body extending parallel to the strand axis. When the planing
tools hit the metal strand they are pushed from an initial position limited by a
stop into the cylinder body against the pressurization pressure. By adjusting the
hollow cylinder body to a circumferential surface of a billet which is round in its
cross section, e.g. by a helical progress of the cylinder body relative to the billet
axis, it is managed to also deburr billets which have a round cross section,
which applies to several adjacent diameter sizes when the individual piston
bodies are arranged axially behind each other and offset from one another in
the circumferential direction. The disadvantageous aspect is the constructional
complexity following the necessary advancement of the cylinder body, espe-
cially when it is necessary to provide two cylinder bodies which are opposite of
each other with respect to the billet to be deburred. Despite providing two cylin-
der bodies with piston bodies each carrying a set of planing tools, it is not pos-
sible to achieve a machining of the billets which is even over the circumference.
SUMMARY OF THE INVENTION
The invention is thus based on the object of arranging an apparatus for de-
burring a metal strand cut into length by gas cutting in such a way that advan-
tageous constructional conditions are obtained for the removal of the cutting
burr of metal strands of round cross section which are cut to length.
Based on a deburring apparatus of the kind mentioned above, this object is
achieved by the invention in such a way that the annular support comprises at
least two sets of planing tools which are radially adjustable to the metal strand
cut to length, which sets are arranged behind one another in the longitudinal di-
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rection of the metal strand cut to length and which are staggered against each
other set by set.
The provision of two sets of mutually staggered planing tools which can be ad-
justed radially relative to the metal strand cut to length offers a simple possibil-
ity of fully deburring cut metal strands of different diameter because a cutting
sequence of the individual planing tools which closes over the circumference is
obtained at different strand diameters through the mutual offset of the planing
tool sets which are arranged behind one another in the longitudinal direction of
the metal strand in the case of respective overlapping of the mutually offset
planing tools. The precondition is an annular support for the planing tools,
which support encloses the metal strand to be deburred and which planing
tools are each adjustable themselves radially to the cut metal strand relative to
the non-displaceable support. The radial tool sets further constitute an advan-
tageous precondition for the complete deburring of the cut metal strand without
having any knowledge of the circumferential position of the cutting burr. The
planing tools of the tool sets merely need to be distributed over the entire cir-
cumference for this purpose.
The advancement for deburring the cut metal strand can also be achieved by
displacing the support relative to the stationary held metal strand. Especially
advantageous conditions are obtained however when the feeding drive com-
prises a punch for the cut metal strand which rests on the punch by the annular
support, which punch extends in the direction of the metal strand and acts on
the face side of the end of the cut metal strand to be deburred. When pressur-
ized in a respective manner, the punch moves the metal strand relative to the
planing tools radially pressed against the metal strand under removal of the
cutting burr by the annular support. No additional fixing is required for cutting
the metal strand that is cut to length and no drive is needed for the support.
The table roller which needs to be provided anyway for feeding and removing
the metal strands to be deburred can thus advantageously be used as a guide
means for the metal strand during the advancing movement by the punch.
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When the punch is pressurized by means of an actuating cylinder, said punch
can also be used as a braking stop for the metal strands supplied via the table
roller, which metal strands are conveyed with their ends to be deburred through
the annular support against the punch and are braked by the same, when after
applying the planing tools against the respective metal strand outside of its cut-
ting burr the metal strand is subjected to a deburring feed with the help of the
stamp against the direction of supply and to eject the same from the apparatus
again.
Especially simple constructional conditions are obtained with respect to the ar-
rangement of the planing tools when the support comprises at least two support
rings for a set of planing tools each, because in this case the support rings with
the planing tools can be arranged with a configuration so as to coincide. It is
merely necessary to ensure a respective angular offset of the support rings in
order to obtain a ring of planing tools which is closed in the circumferential di-
rection. In the case of two support rings, the angle of offset between the two
support rings corresponds to half the angular distance between two adjacent
planing tools of a planing tool set in the case of an even distribution of the two
support rings. The angle of offset decreases accordingly with the number of
support rings.
For the purpose of mutual fixing of the support rings, an axial clamping device
can be provided which clamps the support rings on an abutment. When such
abutment belongs to a carriage which can be displaced in a frame, the appara-
tus can be adjusted easily by displacement of the carriage to different diame-
ters of the metal strands conveyed on a stationary table roller. The alignment of
the support rings relative to the strand axis which changes in its height with the
strand diameter as a result of the stationary strand support does not have to be
especially precise due to the individual application of the planing tools.
BRIEF DESCRIPTION OF THE DRAWINGS
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The subject matter of the invention is shown in the drawing by way of example,
wherein:
Fig. 1 shows a simplified side view of an apparatus in accordance with the in-
vention for deburring a metal strand cut to length;
Fig. 2 shows this apparatus in a partly sectional top view;
Fig. 3 shows a sectional view along the line Ill-Ill of Fig. 1, and
Fig. 4 shows a support ring in a sectional view in the area of a planing tool in
an axial sectional view on an enlarged scale.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
The illustrated apparatus for deburring a metal strand 1 which is cut to length
by gas cutting comprises a frame 2 in which a carriage 3 can be displaced with
respect to height by means of lifting cylinders 4. Carriage 3 forms a support
tube 5 on which a support 6 for planing tools 7 is suspended. Said support 6 is
composed in the illustrated embodiment from three support rings 8 which are
arranged in the longitudinal direction of the cut metal strand 1 behind one an-
other and can be fixedly clamped in the axial direction on an abutment 11 of
carriage 3 by means of a clamping device 9 in the form of screw drives 10 for
example. The support rings 8 which can each be suspended themselves on the
support tube 5 are provided with radial guide means 12 for the planing tools 7,
which guide means are distributed evenly over the circumference and whose
carriers 13 which are displaceably held in the guide means 12 can be displaced
by means of actuating drives 14 for advancing the planing tools 7 to the metal
strand 1 to be machined, e.g. with the help of actuating cylinders. The ar-
rangement is made in such a way that the support rings 8 which are arranged
so as to coincide are arranged in a mutually angularly offset manner, so that a
staggered configuration is obtained for the sets of planing tools which are as-
sociated with each support ring 8, thus producing a ring of planing tools 7 which
is closed over the circumference. Since three support rings 8 are provided in
the embodiment, this means that the individual support rings 8 need to be off-
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set from each other by an angle which corresponds to one-third of the angular
distance of two adjacent planing tools 7 of a support ring 8.
In addition to the support 6 for the radially adjustable planing tools 7, the car-
riage 3 also carries a punch 15 which impinges upon the face side of the metal
strand 1 and which can be pressurized by the actuating cylinder 16. The asso-
ciation is chosen in such a way that the punch 15 which extends coaxially to
the support rings 8 is displaced with the help of the actuating cylinder 16
through the support rings 8 in order to subject the metal strand 1 resting on the
face side of the punch 15 on a table roller to a respective advancing movement
for deburring.
In order to debur a cut metal strand 1 in the form of a billet with round cross
section, the metal strand 1 is brought forward via the table roller 17, with an ad-
justment of the apparatus to the respective diameter of the metal strand 1 being
made by means of a height displacement of the carriage 3.
The punch 15 which is coaxial to the support 6 is aligned at least approximately
to the strand axis. The punch 15 which is advanced via the actuating cylinder
16 against the arriving metal strand 1 can also be used advantageously as a
brake stop in order to thus brake the metal strand 1 in such a way that the end
18 to be deburred which impinges upon the punch 15 protrudes from the annu-
lar support 6, as is shown in the drawing. In this position of the metal strand 1,
the planing tools 7 are situated axially outside of the cutting burr area to be re-
moved. The respective contour of the metal strand 1 is detected and copied
with the radial advancement of the planing tools 7 via the actuating cylinders 14,
so that deburring can occur in accordance with this contour- For this purpose,
the actuating cylinder 16 for the punch 15 is pressurized as an advancing drive
with the consequence the metal strand 1 is pushed out of the apparatus by
punch 15 opposite of the incoming direction, with the cutting burr being re-
moved to an extent which corresponds to the excess portion determined by the
application of the planing tools 7.
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We claim :-
1. An apparatus for deburring with planing tools a metal strand cut to length
by gas cutting, which planing tools are adjustably held each for themselves
transversally to the metal strand in a support, and with a drive for the relative
advancing movement of the planing tools relative to the metal strand which is
cut to length, characterized in that the annular support (6) comprises at least
two sets of planing tools (7) which are radially adjustable to the metal strand (1)
cut to length, which sets are arranged behind one another in the longitudinal di-
rection of the metal strand (1) cut to length and which are staggered against
each other set by set.
2. An apparatus according to claim 1, characterized in that the advancing
drive comprises a punch (15) for the cut metal strand (1) which impinges on the
punch (15) by the annular support (6), which punch extends in the direction of
the metal strand (1) and acts on the face side of the end (18) of the cut metal
strand (6) to be deburred.
3. An apparatus according to claim 1 and 2, characterized in that the punch
(15) which can be pressurized by means of the actuating cylinder (16) forms a
brake stop for the cut metal strand (1).

4. An apparatus according to one of the claims 1 to 3, characterized in that
the support (6) comprises at least two support rings (8) for a set each of planing
tools (7).
5. An apparatus according to claim 4, characterized in that the support
rings (8) can be tightly clamped with the help of an axial clamping device (9) to
an abutment (11) of a carriage (3) which is height-adjustable in a frame (2).
Dated this 11th. day of January 2008.

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An apparatus is described for deburring with planing tools (7) a metal strand (1)
cut to length by gas cutting, which planing tools are adjustably held each for
themselves transversally to the metal strand (1) in a support (6), and with a
drive for the relative advancing movement of the planing tools (7) relative to the
metal strand (1) which is cut to length. In order to provide advantageous deburring conditions it is proposed that the annular support (6) comprises at least
two sets of planing tools (7) which are radially adjustable to the metal strand (1)
cut to length, which sets are arranged behind one another in the longitudinal direction of the metal strand (1) cut to length and which are staggered against
each other set by set.

Documents:

http://ipindiaonline.gov.in/patentsearch/GrantedSearch/viewdoc.aspx?id=MApm5mcyFGSl/iZXdu3s0w==&loc=wDBSZCsAt7zoiVrqcFJsRw==


Patent Number 269167
Indian Patent Application Number 87/KOL/2008
PG Journal Number 41/2015
Publication Date 09-Oct-2015
Grant Date 06-Oct-2015
Date of Filing 11-Jan-2008
Name of Patentee FRAMAG INDUSTRIEANLAGENBAU GMBH
Applicant Address NEUKIRCHNERSTRASSE 9, A 4873 FRANKENBURG
Inventors:
# Inventor's Name Inventor's Address
1 DIPL.-ING. HANS-JUERGEN ENGEL DONKWEG 11A, D 47239 DUISBURG
2 DIPL.-ING. WOLFGANG MALY BAHNHOFSTRASSE 20, A 4840 VOECKLABRUCK
PCT International Classification Number B22D11/126
PCT International Application Number N/A
PCT International Filing date
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 A 83/2007 2007-01-17 Austria