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Патент USA US3068004

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Dec. 11, 1962
Filed Sept. 2, 1959
2 Sheets-Sheet 1
Arne I Té'n beck
Dec. 11, 1962 v
Filed Sept. 2, 1959
2 Sheets-Sheet 2
./ :0
OJ 5
2i. X.HMX
3% P-i t
Patented Dec. 11, 1962
way to the insertion of the tubes and thus delay the as
sembling work. In grave cases of bending of the ?ns, it
may happen that the ?ns leave their grooves and slip into
Arne I. Ronbeck, Ingeujorsgatan, Olofstrom, Sweden, as
signor to Aktiebolaget Separator, Stockholm, Sweden, a
corporation of Sweden
Filed Sept. 2, 1959, Ser. No. 837,612
Claims priority, application Sweden Mar. 2, 1959
10 Claims. (Cl. 269-43)
and-?n radiator is discarded. The tubes must therefore
be inserted with great care and, at most, one at a time.
An object of the invention is to overcome this difficulty
and provide a ?xture which supports the ?ns at such
points that they allow a fast and rough insertion of one
The present invention relates to a ?xture for assem
bling radiator elements and more particularly for ‘assem
bling radiators of the ?n and tube type, such as those
the adjacent grooves, the result being that the whole tube
10 or more tubes at a time without any risk of the ?ns bend
ing in any appreciable degree or being deformed or
leaving their predetermined positions in the ?xture.
Another di?iculty, which is a consequence of the
liability of the ?ns to bend and of the lack of adequate
commonly used in the automotive and refrigeration ?elds.
Radiators of the ?n and tube type normally comprise 15 supporting points for the ?ns in the ordinary ?xture, is
that the holes for the tubes in the ?ns must be made with
a su?iciently loose ?t around the tubes to allow insertion
of the tubes, which means unsatisfactory contact between
the ?ns and tubes. This results in a great consumption
conductivity. Passage of cool air through such a core 20 of solder during the subsequent soldering of the tube
and-?n radiator, to provide a good joint and good heat
structure is an effective means of cooling a liquid or
transmission between the ?ns nad tubes.
gas circulating in the tubes. In automotive uses, cores
Another object of the invention is to overcome the
of this type are normally operated with the tubes in par
last-mentioned dif?culty and to make it possible to use
allel; that is, the fluid to be cooled travels through all of
the tubes in the same direction. In the refrigeration 25 a tighter ?t between the ?ns and tubes and thus permit
a lower consumption of solder.
?eld, the tubes are usually serially connected so that
In using the prior ?xtures for assembling the tubes
?uid passes sequentially through one tube after the
and the ?ns, it has been necessary to introduce the tubes
other. In radiators of this type, the tubes may be ar
at various points in the ?xture until all the tubes have
ranged in a common plane or in parallel planes and are
normally soldered to the ?ns to maintain a high de 30 been inserted, which is an inconvenience.
A further object of the invention is to remove this in
gree of thermal coupling between them.
convenience and to provide such a ?xture for the ?ns that
The starting material for the tubes is usually brass
it will be possible to introduce the tubes at one and the
sheet bands 0.15 mm. thick, which are formed into ?at,
same point of the ?xture, either by hand or by ma
folded tubes in a tube rolling mill, and are cut to suit
35 chine. This object is accomplished by an arrangement
able lengths for being mounted in the stack of ?ns.
enabling the ?ns to be displaced stepwise in the ?xture a
The starting material for the ?ns is usually copper
distance corresponding to the distance between the holes
sheet bands 0.10 mm. thick and particularly hard-rolled.
in the ?ns each time an introduction of one or more
The manufacture of the ?ns is usually completely auto
tubes has taken place.
mated. The edges of the band are ?rst doubled over in
A ?xture made according to the invention comprises
an edge rolling mill in order to make them stiff and to 40
a series of parallel guide plates securely connected to
prevent them from causing injuries by cutting. The
each other in spaced relation and provided with sup
bands are then punched to provide them with holes for
porting means for ?ns to be ?tted between the guide
the water tubes, and the edges of the holes are provided
plates, these plates being provided at one end with re
with collars to increase the surface of contact with the
tubes. Finally, the ?ns are cut to suitable lengths. If 45 cesses which are open toward this end for receiving the
tubes. Other features and advantages of the invention
the ?ns are provided with two or more rows of holes for
will appear from a preferred embodiment as described
tubes in different planes, a longitudinal corrugation
more in detail below and illustrated in the drawings, in
is made in the ?n sheet between the rows of holes in
order to make the ?ns more ?rm.
FIG. 1 is a perspective view of my novel ?xture show
In assembling the tubes with the ?ns to form the radi_ 50
ing the location of the ?ns with three tubes inserted‘
ator, a ?xture is used. This consists of two plates which
a series of parallel thin-wall tubes made of a metal hav
ing a high degree of thermal conductivity, such as brass
or copper, and supported in a stack of closely spaced par~
allel cooling ?ns also of a metal having a high thermal
are kept spaced from each other by suitable means so
FIG. 2 illustrates in perspective the shape and position
that those surfaces of the plates which face each other
of the top and bottom frame members shown in FIG. 1;
are parallel. These surfaces are provided with parallel
FIGS. 3 and 4 are face views of one of the side frame
grooves for receiving the ?ns so that the latter, when 55
members and one of the ?n spacer plate members, re
?tted in the grooves, will get support and guidance at
their edges from the grooves and will take the relative
FIGS. 5 and 6 are face views of upper and lower sepa
positions they are intended to have in the ?nished radi
rator members, respectively, for the ?n spacer plates;
FIG. 7 is a magni?ed cross-sectional view of the ?xture
The ?ns are inserted by hand, individually or many at a 60
taken along line V—V between points A and A’ of FIG. 4,
time, into these grooves so that the holes in one ?n will
be aligned with the holes in another ?n and permit in
sertion of the tubes into the holes throughout the pack of
showing the location of one ?n in position between sepa
rators and showing how deformation is prevented as a
tube is inserted in the core;
?ns. The tubes are inserted by hand, one by one. When
FIG. 8 is a plan view of a section of ?n material;
all the tubes have been inserted, the tube-and-?n radi 65
FIGS. 9 and 10 are cross-sectional views of the ?n of
ator is withdrawn from the ?xture for further treatment.
One di?iculty in thus assembling such radiators, es
pecially when the tubes are to lie in two or more planes,
FIG. 8 taken along lines IX-IX and X-X, respectively,
in FIG. 8; and
FIG. 11 is a cross-sectional view of a typical tube to
is that the ?ns, when the tubes are passed through the
holes, are supported by the ?xture only at the outer 70 illustrate the shape thereof.
edges of the ?ns, whereby the thin ?ns will be liable to
The radiator ?ns, as shown in FIGS. 8, 9 and 10, are
bending and deformation or offer resistance in some other
fabricated from strip stock whose edges 26 and 2.7 have
is illustrated in FIG. 1, where may be seen a series of ?ns
12 being inserted into the ?xture. The ?ns must next be
aligned at the trailing edge of the ?xture so that the slots
cutting hazard encountered during handling. Longitudi
are all in alignment, with cut-outs 14, 15 and 16.
nal grooves 28 are embossed in the strip material either
Where the tube 19 is insufficiently strong to withstand
in the same rolling mill or by subsequent operation. The
the pressure required to force it through a wide stack of
next phase in‘the formation of the ?ns is that of punching
?ns, a mandrel (not shown) may be inserted irito the tube
the openings 13 for the tubes. This is accomplished by a
to prevent its distortion and then removed after the tube
piercing operation so that the unwanted material will be
is inserted. After the ?rst series of tubes have been in
pushed through the opening and leave ?aps or collars as
shown at 29, 30 and 31 in FIG. 9. These projecting col 10 serted, the ?ns 12 are advanced until the next row of slots
comes into alignment with the cutouts 14, 15 and 16,
lars function as stiifeners and as surfaces of contact be
whereupon the next set of tubes are inserted. This is re
tween the tube and ?n during the subsequent soldering
peated until a unit of the desired Width is attained. It will
operation, to increase the thermal e?iciency at the joint
be understood from FIG. 1 that each cut-out 15 is deeper
The tube 19, as shown in FIG. 11, has a locked seam 15 than the cut-outs 14 and 16 by an amount equal to half
the distance between the longitudinal centerllines of two
33 which is subsequently sealed by soldering.
been folded double in an edge rolling mill to stiffen the
material and to dull the razor-sharp edges to reduce the
My novel ?xture will now be described, with particular
reference to FIGS. 1 to 6.
adjacent holes 13 in the ?ns 12.
I claim:
1. A device for assembling a plurality of radiator ?ns
In FIG. 1, the ?nished ?xture is generally indicated by
the numeral 1. It comprises an upper frame support 2, 20 and tubes, each ?n being in the form of a sheet having
a substantially greater length than width and having two
a lower frame support 3, and side plates 4 and 5, all held
longitudinal edges and a row of perforations spaced
in proper relationship by bolts 6 passing through holes 7
lengthwise along the ?n between said edges for receiving
in the side plates ‘and through holes 8 ‘in the upper and
the'tubes, said device comprising the combination'of a
lower frame supports.‘ Within the ?xture are a series of
spacer plate members 9, as shown in FIG. 4. The spacers‘ 25 plurality of separator plates ‘interconnected in parallel,
closely spaced relation to form interspaces in each ‘of
are cut out as at 22 and 23 to provide a dovetail connec
which one of sad ?ns is adapted to be disposed substan4
tion with the upper and lower support members which
tially parallel to the plates, each interspace'being of a
have a conforming shape, as shown at 20 and 21 in FIG.
thickness at ‘least as great as the maximum ‘thickness of
2. Other arrangements for mounting the spacers 9 would
the ‘corresponding ?n, said plates being interconnected
be equally suitable, as the mounting arrangement has ‘no
at opposed portions located, respectively, opposite the
important role in the utility of the ?xture. The spacers 9
two longitudinal edges of the'respective ?ns when .the
are in turn spaced on the supporting members by the
?ns are so disposed in said interspaces, the plates having
spacing elements 10 and 11 illustrated in FIGS. 5 and 6,
respectively. Thus, between each pair of adjacent spacers
leading and trailing opposed edges extending generally
9 are a spacer element 10 and a spacer element 11. The 35 transversely of said opposed portions and forming there
between, respectively, entrance and exit openings to and
leading edge of the short spacer 10 is beveled as at 37 to
from said interspaces, whereby the ?ns are adapted to
perform a funnel function on the upper edges of the ?ns
move lengthwise through said interspaces from said \‘en
as they are inserted into the ?xture.
trance to said-exit openings while guided by the‘ inter;
The side plate members'4 and 5 ‘and ‘all vof the spacer
members 9 have corresponding cutouts 14, 15 and 16 40 connected plates, the distance between said leading and
trailing edges being substantially less than said ?n length
through which access may be had to the openings 13 in
so that the ?ns are adapted to protrude lengthwise from
the ?ns for insertion of the tubes. In FIG. 1, a tube 19
is illustrated in the partly inserted position and passing
through the opening 16. The ?ns are inserted from the
lefthand side for the reasons to be hereinafter described.
Spacers 9 have corrugations 34 to correspond with the
corrugations 28 in the ?ns. However, the corrugations
34 are not uniform. They are narrow and shallow at the
leading edge, and they become linearly wider and deeper
the interspaces to provide exposed ?n parts for effecting
said lengthwise movement through the interspaces, said
trailing edges of the plates having a plurality of aligned
recesses adapted to receive one of said tubes at said exit
openings and with which one perforation of each ?n is
adapted to be aligned by said lengthwise movement of
the ?ns, said recesses opening in the direction of said
as they approach the trailing edge in the vicinity of the 50 lengthwise movement of the ?ns to allow continuance of
said movement after insertion of a tube through the
tube insertion openings 14, 15 and 16. This feature of
aligned recesses and ?n perforations.
my invention has the dual function of providing a funnel
2. The combination de?ned in claim 1, wherein each
ing action as the ?ns are inserted into the ?xture to
of said separator plates has at least one corrugated em
facilitate their entrance and to limit the critical spacing
bossment running from the leading edge to the trailing
function of the spacers to the tube insertion region at
openings 14, 15 and 16. The upper edge of slot 14 and
edge thereof.
the lower edge of slot 16 of the spacers 9 are cut, as at 35,
3. The combination de?ned in claim 1, wherein each’
and a portion of the edge is bent outwardly, as seen at 35
of said separator plates has at least one corrugated ‘em
in FIG. 7, in the form of a saw-tooth. These points con
bossment running from the leading edge to the trailing
tact the ?n in the region of the upper tab 32 adjacent the 60 edge thereof, said corrugated embossments gradually in
upper portion of the ?n slots 13, while the corrugation 34
creasing in’ depth and width from the leading edge to the
in the spacer contacts corrugation 28 of the ?n immedi
trailing edge of the corresponding separator plate.
ately below the slot.
4‘. The combination de?ned in claim 1, including also
As illustrated in FIG. 7, the function of these projec
means for supporting said separator plates comprising
tions 34—35 in supporting the ?n 12 is to provide a thrust 65
blocks having'shaped projections thereon adapted to en
bearing surface against which the ?n is urged by insertion
gage correspondingly shaped slots in said separator plates,‘
of the tube 19. These projections above and below the
and spacer members holding said blocks in spaced re
tube slot 13 minimize the amount of deformation to which
the ?ns would otherwise be subjected, and assure uniform
5. The combination de?ned in claim 1, wherein the
?n spacing in the ?nished product.
70 plane of the leading edges of said separator plates is out
In operation, the width of the ?xture is determined by
of parallel with the plane of the trailing edges of said
the number of ?ns to be accommodated. For instance, in
the automotive radiator ?eld, where the tubes normally
6. The combination: de?ned in claim 1, comprising
are vertically arranged, the‘?xture may be as much as two
feet in-widthto accommodate many ?ns. The operation 75 also thrust projections on the separator plates located
adjacent said recesses to support the ?ns during insertion
of a tube through said recesses and aligned perforations.
7. The combination de?ned in claim 1, comprising
also thrust projections on the separator plates located ad
jacent said recesses to support the ?ns during insertion
of a tube through said recesses and aligned perforations,
said projections being formed by bent portions of the
8. The combination de?ned in claim 1, comprising also
means interconnecting said plates and including beveled
edges for tunneling the ?ns into said interspaces.
9. The combination de?ned in claim 1, in which each
said trailing edges of the plates have an additional plu
rality of aligned recesses for receiving an additional tube
to be inserted through perforations in additional rows
of perforations in the respective ?ns, said additional
aligned recesses being deeper than the other aligned re
10. The combination de?ned in claim 1, in which each
of said recesses is adapted to receive the entire cross
section of one of said tubes.
References Cited in the ?le of this patent
Seelert ______________ __ Apr. 28, 1931
Ritter ______________ __ Dec. 15, 1931
Bennett _____________ __ Nov. 6, 1934
Young _____________ _'__ Oct. 29, 1946
Lornor ________________ __ Jan. 5, 1954
Kritzer _____________ __ Oct. 29, 1957
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