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Патент USA US2109890

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March 1, 1938;
w. w. PATTISON ET AL
2,109,890
METHOD OF MAKING RAILWAY CAR AXLE JOURNAL BEARINGS
Filed March 23, 1956
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March ‘1, 1938.
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2,109,890 ‘I
METHOD OF MAKING RAILWAY CAR AXLE JOURNAL BEARINGS
Filed March 25, 1936
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BY
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INVENTORS
‘WAYNE WQPATTIsON
FREDERICK J- SANGER
_ .4 TTORNEYS
>
March 1, 1938.
I
w. w. PATTISON ET AL.
2,109,890
METHOD OF MAKING RAILWAY CAR AXLE_JOURNAL BEARINGS
'
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Filed March 25, 1936
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A TTORNE VS
2,109,890
' Patented Mar. 1, 1938
UNITED STATES PATENT OFFICE
2,109,890 I
METHOD or MAKING RAILWAY CAR AXLE
‘ JOURNAL BEARINGS
Wayne W. Pattison and Frederick J. Sandner,
Detroit, Mich, assignors to Bohn Aluminum &
Brass Corporation, Detroit, Mich, a corpora
tion 01' Michigan
l
'
Application March 23, 1930, Serial No. 70,427
4 Claims. (Cl. 29-14%).5)
The invention relates to railway car axle jour _ on line 7-1, of Figure 3 and. showing the assem
nal bearings and it is the object of the inven
bled unit as initially introduced into the holder.
tion to obtain an‘ improved construction and to
facilitate the manufacture of the same. In the
5 present state of the art, railway car axle jour
nal bearings have been. standardized, both as to
form and dimensions. It is also usual to form
. The standard construction’ of railway car axle
journal bearing comprises a body member A, gen
erally formed of brass or bronze, having an arou
ate inner face B and a polygonal outer face C.
There are also laterally extending ?anges D at
‘each side of the arcuate portion suitably fash
some constructions there is a lining or wearing ioned for engagement with cooperating members
l0 face formed of babbitt. This improves the anti
in ‘the car axle box. A single bearing is used
friction properties but in case of a hot box the in each. car axle box, this being arranged above
babbittv will be melted and it is, therefore, neces- , the axle to carry the load thereinto. However,
sarythat the body portion of the bearing should with our improved method, we simultaneously
be capable of carrying the load under such condi
babbitt two of these bearings arranged opposite
15 tion. However, this melting of the babbitt fac
each other. As the arcuate faces are less'than a
ing is very undesirable, and it is one of the ob
‘half circle, we place between these bearings com
plementary members or'shims E which will space
jects vof the present ‘invention to obtain a con
these bearings of cast bronze orbrass and with
further object to obtain a construction in which
them apart so that the centers of the arcs will
coincide. The members E have a portion E’ which
zo-{tne babbitt lining has a greater density‘ and
is arranged between the ?anges D and which
purity so as to have greater resistance to load,
and a higher thermal conductivity useful in dis
extend inward to be flush with the arcuate faces
of the bearings. The members E are also 'pro
struction which wiil avoid such result. , It is a
sipating heat.
,
vided with ?anges E2 which bear against the outer.
>
Babbitt lined journal bearings have hereto
re been formed by centrifugally casting the
babbitt in the supporting shell'. ,In this process,
the shell is either a complete annulus or com
prises hali' sections clamped to each- other to
form such‘ annulus. A railway car axle journal
hearing has an arcuate bearing face which’ is
considerably less than a'half circle and, conse
quently, it is incapable of being centrifugally bab
bitted in the manner above described. We have,
35 therefore, devised a .novel method of accom
plishing the desired result, and have further, de
vised an apparatus for receiving and holding the
journal hearings in such- relation that they may
‘
be centrifugally babbitt lined.
40 therefore, consists:
‘
The invention
I
-
First, in the novel construction of a centrifu
gally babbitt lined ‘railway car axle journal bear
ing;
1
45
,
»
Second, in the method of lining said bearing.
Inthe drawings:
‘
'
Figure. 1 is aside elevation of the apparatus‘;
Figure 2 is a front end elevation thereof;
' Figure 3 is a cross-section;
‘
_ '
'
Figure 4 is a longitudinal section on line 4-4
50 of Figure 3;
‘
A
'
' Figure 5 is a perspective view-of one of the,
bearings and one of the shims;
Figure 6 is a cross-section showing the lined
bearings with the shims detached therefrom;
56 Figure 7 is a view similar to Figure 4, but taken
ends of the ?anges D and are correspondingly
fashioned. . Thus, by clamping these flanges E2
of the members E'against the ?angesD there will
be formed a complete annulus with the bearings V
A on diametrically opposite sides thereof.
This assembly is placed in'a centrifugal cast
ing machine of the following construction:
30.
, F is a frame in which is journaled in bearings
'F', F2 a rotary spindle G. This spindle is driven
by a pulley G’ which can be coupled or uncoupled
from the spindle by the operation of a clutch G2,
not shown in detail. At the outer end of the spin
dle is a head Hand upon this head is mounted a
hollow frame I formed in half sections I' and I2,
and internally of a cross-sectional contour corre- - ‘
sponding to the external contour of the assembled
members A and E. Thus, the assembled unit may 40
be inserted‘ axially within the frame I to be 81"!
ranged concentric with the axis of the rotary
spindle. Su?icient clearance is provided to per
mit of readily inserting and removing the as
sembly from the frame, and set screws J are 45
arranged to be tightened against the shims on
opposite sides of the frame‘ to exactly center
the-‘assembly. At the front end of the frame I
is a removable head K which'after the insertion
of the bearing and shinr‘assembly can be secured
by bolts K’. This head has an axial opening K2
which ?ares inwardly. -
The method of procedure in the centrifugal
babbitting of a pair of car axle journal bearings
is as follows:
‘
. ~
2
2, 109,890
The bearings A are preheated on a gas plate the interior thereof in su?icient quantity to form
or any other suitable means to a temperature of , a continuous annular lining, continuing the spin
approximately 250° F. lI'he inner arcuate sur .ning until solidi?cation takes place, removing
faces are then swabbedv with a suitable ?ux, such from the holder, separating the shims from the
bearing bodies, and severing the lined bearings
as zinc chloride. The bearings are then gripped
from the cast segments intermediate the same.
with tongs at one end and plunged into the bond
2. In a method of forming railway car axle
ing alloy which is maintained at a temperature
of 660° F. being permitted to remain immersed in
the bath for about one and one-half minutes.
10
Upon removal, the surplus bonding alloy'is wiped
journal bearings, the steps of. assembling a pair
of oppositely facing heated bearing bodies having
the arcuate inner faces thereof coated with bond
off and the bearings, are assembled with the shims
ing material together with interposed comple
oE which have been previously heated to about
mentary arcuate shims the‘ whole forming a
‘closed annulus with a substantially cylindrical in
300° F. The members of the assembly are held
together by a clamp L applied at one end, while
15 the opposite end is inserted in the hollow frame
I, the spindle being stationary. After insertion,
ner surface, placing the heated assembly in a
rotary holder for retaining the members in ?xed 15
relation, spinning the holder, introducing molten
the set screws J are tightened and the head K is _ metal in su?icient quantity to extend inward be
placed in position and secured by the bolts K’.
Rotary motion is then imparted to the spindle,
yond the inner faces of the shims, continuing the
spinning until solidi?cation takes place, remov
A babbitt of suit - ing from the holder, separating the shims from 20
able composition such as 3 to 5% tin, 8 to 10% the bearings, and severing the cast segments
which were adjacent to the inner faces of the
antimony and 85 to 88% lead and at a tempera
ture of 840° F. is then pouredinto the opening shims from the portions cast in and bonded to
the bearings.
'
K2 of the head K and will be immediately dis
3. In a method of forming railway car axle
tributed by centrifugal action around the inner
journal bearings, the steps of assembling a bear¢
faces of themembers A and E. The speed of ro
tation is then preferably increased to 800 R. P. ing body having a limited arcuate surface with
M., and a blast voi’ cooling air is directed from a complementary means for forming a closed an
nozzle M against the outer face of the revolving nulus with a substantially cylindrical inner sur
30 frame I for approximately ?ve minutes. The face, placing ‘the assembly in a rotary holder 80
head K is then removed and the bearing shim with the axis of the cylindrical surface substan
.20 preferably at 650 R. P. M.
assembly is removed. .\ The babbitt lining will be tially coincident with the rotational axis, spin
a complete annulus N, but as the shims have not ning the holder, introducing molten metal into
been coated with a bonding alloy, they will not the interior of the annulus to form a lining there
adhere to the casting and ‘are readily separable for, continuing the spinning until solidi?cation 85
therefrom and from the bearings A. The two takes place, removing from the holder and sever
bearings can then be separated by cutting off the - ing the portion cast in the complementary means
portions N’ of the babbitt extending between the
'40
same.
'
A railway car axle journal bearing babbitt
lined in the manner above described is superior
in performance on account of the high density
journal bearings, the steps of assembling a pair 40
of oppositely facing bearing bodies with com
plementary means for forming a closed annulus
journal bearings, the steps of assembling a pair
with a substantially cylindrical inner surface,
placing the assembly in a rotary holder with the
axis of the cylindrical surface substantially co 45,
incident with the rotational axis, spinning the
holder, introducing molten metal into the interior
of oppositely facing bearing bodies having their
of the annulus to form a lining therefor, continu
and purity of the lining and resulting high ther
mal conductivity and greater resistance to load.
45
from the lining of the bearing.
'
4. In a method of forming railway car axle
What we claim as our invention is:
1, In a method of forming railway car axle
arcuate inner faces coated with a bonding mate
50 rial together with a pair of complementary arcu
ate shims therebetween the whole forming a
closed annulus, placing the assembly in arotary
holder with the axis of the cylindrical surface
substantially coincident with the rotational axis,
spinning the holder, pouring molten metal into
ing the spinning until solidi?cation takes place,
removing from the holder and cutting off the cast 50
segments opposite the complementary means
from the linings of the bearings.
.
'WAYNE W. PA'ITISON.
FREDERICK J. SANDNER.
55
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