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Патент USA US2409771

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APPARATUS FOR CONTINUOUSLY PROCESSING METAL STRIPS‘
Filed April 15, 1941
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APPARATUS FOR GONTINUOUSLY PROCESSING METAL STRIPS
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_APPAR_A'I'US FOR CONTINUOUSLY PROCESSING METAL‘ STRIPS
Filed April 15, 1941'
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Patented Oct. 22, ‘1946
UNITED STATES PATENT. OFFICE
APPARATUS FOR CONTINUOUSLY PROCESS
ING METAL STRIPS
Frank W. Lorig, Lakewood, Louis L. Miller, Gar
?eld Heights, and Frank E. Robinson, Shaker
Heights, Ohio, assignors to The American Steel
and Wire Company of New Jersey, a corpora
tion of New Jersey
Application April 15, 1941, Serial No. 388,708
4 Claims.
(Cl. 271——2.3)
1
This invention relates to the continuous proc
essing of metal strips and, more particularly, is
directed to an improved means for performing a
.heat treatment on one or several strips of steel
wherein the exposure of the strip to the processing
treatment can be very carefully regulated and
2
showing of this view continuing from the line
a--a of Figures 2 and 2a; Figure 2b is a still fur
ther extension of ‘the apparatus, the view continu
ing from the line b~—b of Figures 2B‘ and 2'“; Fig
ure 2° is a still ‘further extension of the appara
tus, this view continuing from the line c--c of
Figures 2 and 2°;
Figures 3, 4, and 5 are side elevational, rear
elevational,
and plan views, respectively, of a
duced in strip form, such as silicon steels intended
for use in electrical apparatus, which strips, in 10 typical form of aligner;
Figures 6 and '7 are side elevational and rear
order to develop the optimum in physical or elec
elevational views, respectively, of one of the strip
trical properties, have to be subjected to carefully
forwarding mechanisms;
controlled heat treatment. In the 108.58 of electri
‘Figures 8, 9, and 10 are side elevational, plan,
cal sheets, such processing is carried out by batch
annealing or normalizing processes which are 15 and end views, respectively, of one arrangement
of pinch rolls adapted to control the advancement
facilitated by the physical shape of the material
critically controlled.
There are some types of steel which are pro
of the strip;
being treated, rendering special equipment in giv
ing effect thereto unnecessary.
In the case of
strip steel, however, the commercial requirements
'
Figures 11 and 12 are side elevational and trans
verse elevational views, respectively, of one ar
are such as to render the production of all widths 20 rangement of master pinch rolls;
of strip steel, ranging from 6” wide, or less, up to
42" and wider, necessary. The elaborate heating
Figures 13 and 14 are a fragmentary detailed
View (shown partly in section) and a rear eleva
tional view, respectively,,of one of the apparatus
units designated ‘by the letter V in the line illu
be applied in performing the continuous anneal
in Figures 1° and 2°;
ing of such strips, renders prohibitive the provi 25 strated
Figures 15 and 158“ are schematic planar pro
sion of separate processing lines‘for each strip,
jections showing how one form of apparatus em
or each width of strip to be operated upon. It is,
bodying the present invention can accommodate
therefore, one of the main considerations, of the
‘different widths and ‘numbers of strips, and the
‘present invention to provide a unitary line for the
relative placement thereof as to the catenary
continuous heat treatment of one or more strips
pinch rolls (designated by reference numerals
irrespective of the widths thereof up to a prede
pre?xed with the letter “M”) and wind-up reels
termined maximum.
7
(designated by reference numerals prefixed with
In accordance with the present invention, it is
‘the
letter “X”) ;
contemplated that, either one strip of maximum
Figures 16 to 21, inclusive, each shows, in sche
width, or a plurality of strips of less widths, the
matic planar projection, the placement of rolls
total of which does not materially exceed the strip
in the catenary pinch roll unit and how di?erent
of maximum width, ‘can be processed simulta
widths of strip, as illustrated in Figures 15 and
neously, with each strip being independently con
15a may be accommodated therein in varying
trolled and regulated in its course through the
processing zones .of the line without interference 40 numbers.
Fig. 22 is a fragmentary side elevation of the
with or from the adjacentstrips being processed.
catenary furnace employed in conjunction with
In the drawings:
the present invention;
Figure l is a partial plan view of the improved
furnaces and appurtenant equipment that must
Fig. .23 is a sectional elevation of the furnace,
.
taken on line XXII-—XXII of Fig. 22;
‘
Figure la is a continuation of the apparatus,
Figs. 24 and 24A taken together illustrate a
this view continuing from the line a—cl, Figures 1
wiring diagram of the complete electrical con
and 1*‘; Figure 1b is a further continuation of the
trol system of the apparatus, Fig. 24A being a
apparatus, this view continuing from the line
continuation of the diagram of Fig. 24,
b—b, Figures la and 11); Figure 1° is a further
Referring now more particularly to the draw
continuation of the apparatus, the view continu 50
ings, there is shown in Figure 1 a side elevational
ing from the line c—c, Figures 1b and ,1“;
view of one form of equipment that gives effect
Figure 2 .is a partial sectional elevation of the
apparatus of this invention;
apparatus, the view being taken .along the center
line of Figure 1;
V
to a preferred arrangement of the invention.
‘In general, a strip supply depot is indicatedat
Figure 2a is a continuation of'Figure 2, the 55 A, from which one or more strips are paid suc
3
2,409,770
cessively through an aligner B, a connecting unit
0, intermittently actuated pinch rolls D, from
which the strip is guided past an accumulator
pit F by aligner units E and G. From thence,
the strip is passed through cleaning, rinsing, and
drying units H, J, and K, through aligners L to
a series of pinch rolls M1 through M7, which are
adapted to accommodate one or more strips of
4
strip, is a pair of transversely extending plates 5
and 5’, which are secured to the uprights 2, closely
adjacent the ball bearing rolls already described.
As will be observed in the plan view of Figure 5,
these plates are provided with a plurality of holes
6 which provide bearings for vertical pin members
I, which pins can be selectively arranged in the
holes in any number required to effect lateral
varying widths, and which are regulative indi
spacing and restraint of the strips.
vidually to determine the rate of movement of 10
The tail end of one strip is fastened to the lead
each of the strips through the system, as will be
end of a new coil in any suitable manner, as has
described in detail hereinafter. From the pinch
been indicated by the articulator C, which may be
roll unit M the strip is conducted through align
a device for welding the strip together in any
ers N and 0, through a heating zone P, which
approved manner.
is here illustrated in a form of catenary furnace. 15
Immediately following the welder there are ar
From the catenary furnace the strip is passed
ranged the welder pinch rolls D, which are shown
through a cooling zone Q, thence through other
in greater detail in Figures 6 and '7. It will be
aligners and guide means R and S, to a master
seen that this unit comprises a pair of housings
pinch roll unit T, from whence it is directed over
Ill having an upper roll I I revolubly journaled
an accumulator pit U, and thence to the take—ups 20 therein on stationary bearings l2. The lower roll
Xl through X7 through guide and control means
!3 is revolubly journaled in the housings it] upon
V and W, all of which will be described more
slidable bearings 14 which are adapted to be
fully hereinafter.
raised and lowered toward and away from the
As an example of the capacity and ?exibility
upper roll H. The slide bearings M of the lower
of one apparatus built in accordance with the 25 roll are actuated by a plurality of arms i5 which
present invention, similar to that shown in the
are fulcrumed to the housings ID by pivotal bear
accompanying drawings, such a line has been de
ings It so as to be moved to raise and lower the
signed to handle from one strip 30" wide to seven
slide bearings I 4 .by a ?uid cylinder and piston
strips 6" wide, or narrower. It will, of course,
arrangement ll. A motor I8 provides power to
be understood that there is nothing critical about
each of the rolls H and I3 through a suitable
these dimensions, these being but illustratory of
reduction gear unit I9 and drive couplings 20.
one arrangement, and capable of being varied
\The normal position of the lower roll is one of
within wide limits for the accommodation of a
spaced relation to the upper roll so that, nor
greater or lesser number of strips of diiferent
mally, strips being moved through the line will
widths than those here speci?ed. In any case,
pass between these rolls without contact there
the number of strips usuallyr depends on the in
with, at which time the rolls are idle. When any
dividual widths of each, as dictated by the re
one of the strips being run nears the end of its
quirements of the orders being ?lled, and as ap
length, the lower roll is raised by the fluid cylin
plied to and limited by the capacity of the par
der ll so as to squeeze the strips. Simultaneously,
ticular design of line employed. In furtherance 40 the motor [8 is energized to drive the rolls H
of the example given, however, the total strip
and I3 at surface speeds greater than the normal
width will not exceed 42". Stated another Way,
rectilinear speed of travel of the strip, whereby
the width of the area occupied by all of the strips,
an amount of slack strip is induced to fall in the
which includes the spacing between adjacent
accumulator pit F. The pinch rolls continue to
strips, will not exceed 60". Within those limits,
drive in this fashion until the end of that strip,
or within greater or lesser limits for equipment
which is about to become exhausted, reaches the
especially designed therefor, any combinations of
connecting unit C, whereupon the pinch rolls D
widths of strips may be run.
are automatically stopped but remain closed to
Referring once again to the drawings, the sup
secure the several strips, and particularly the
ply depot A may comprise a plurality of hori 50 length being operated on by the articulator, from
zontal floor stand type reels I for serving strips
being pulled forward into the slack pit F by their
to the line, seven in number having been shown
own weight. After the connecting step has been
so as to be consistent with the example already
completed, the pinch rolls D are allowed to as
given. These may be of any approved construc
sume their normal inactive open position in order
tion and may be varied to suit the taste of the 55 to permit the resumption of the feeding of the
operator.
strips from the supply depot A.
From the reels I, the strip is passed through
It will be observed that this arrangement ren
aligning device B which, in construction, corre
ders unnecessary the stopping of the strip beyond
sponds to aligners L, N, O, and B, so that one de
the accumulator pit during the connecting oper
scription should suffice for all. By reference to 60 ation since, while this is going on, the remainder
Figures 3-5, each aligner is comprised of side
of the line beyond the looping pit F continues to
frame members 2 which are set upon suitable
operate at the ordinary speed, using the slack
mountings or bases 3 adjacent the ?oor, each
strip accumulated in the pit F until the connect
side member in relation to the other being spaced
ing operation has been completed. With respect
therefrom so as to straddle the line of passage 65 to the accumulator pit F, it is desirable that this
of the strip. A pair of rolls 4 are journaled for
be provided with a wooden lining 30 to prevent
rotation in the side frames 2, and are preferably
marring the surface of the strip. Also, it is de
provided with ball bearings so as to offer the least
sirable that the strip be led into and withdrawn
possible resistance to the passage of the strip
from the pit by guide devices E and G which
therethrough when they are pressed in engage 70 comprise a plurality of rolls 3i , so spaced to pre
ment therewith in performance of their ?attening
vent any sharp bends or breaks in the strip and
function. These rolls are preferably idle.
which may be provided with vertically arranged
Mounted upon the strip approach side of these
spacers 32 similar to those previously described
aligning rolls. and arranged so that one falls
in the case of the aligner B for preventing the
above and one falls below the passage of the 75 lateral displacement of thestrips.
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