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Патент USA US2404656

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„My 23s E945,
Filed Feb. 8, 1945
3 Sheets-Sheet 1
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.Emily 23, i946.
> F. w. RIEDEL
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- 2,404,655
Filed Feb'. 8, 1945
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Patented July 23, 1946
Frederick WfRiedel, Belle Vernon, Pa.
’Application February 8, 1945, SerialNo. 576,803»
2 Claims.
(CL, 266----5)
eningl torch is so supported by the- carriageV I0
that it can be moved. relatively to its mate.. and
each can be individually raised and lowered byn a
suitable adjusting screw carrying a handvwheel
l5 which operates a vertically movableltorch- sup
porting slide I6 mounted in. guides I1 mounted on
The present invention relates to improved. fea
tures: of: construction. and arrangement: of guid
ing; means for a flame hardening torch such as
used to harden, temper, or otherwise heat treat
a metal workpiece. Such, flame hardening
torches are broadly old, and the herein claimed
improvement is directed chiefly to a novel torch
guide inclined to the longitudinal axisv of the
the carriage.
work, means fory urging a follower member se
The carriage l0 is adapted to` be moved man.
ually in a horizontal plane along guides` I. l to
cured to the torch'into engagement with the
guide, supporting; means forl adjustably varying
the elevationA of the: guide, and means for adjust
ing the angularity of the guide with relation. to
I2 are mounted on the carriagey in suchv manner
as to be movable
opposite directions trans
versely- of the longitudinalV movement of. the car
ward. and from the workpiece W, and the torches
riage. As illustrated by Way of example in the
said supporting means.
`While not. limited, thereto, the embodiment of` 15 drawings, the blow-pipes i3, forming part of the
torches, are secured to the slides i6, and these
theY invention illustrated is peculiarly well suited
pipes are suñiciently flexible tov permit the nozzles
I4 to move transversely» of the line'rof travelof`
the carriage'.` Such transverse movement of the
nally taperedA tooth of a. bevel gear which is so 20 torch nozzles is effected by a relatively'stiff steel
spring loop I9 engaging the blow-‘pipes- |-3-|3,
mounted in` a normally fixed chuck that each
as. shown in Figure» 6‘.
tooth can be successively brought to position to
As shown in Figures 3 and 5, the work", to be
be acted upon by the` torches.
flame- hardened is a bevel gear- W, having a plu
For a more complete understanding of the in
rality of teeth indicated at t. The opposite walls
vention, reference should. be made to the accom
t" of each tooth taper from the butt end- of the
panying drawings, the following detailed disclo
gear toward> the front end` thereof. The present
sure, and. the appended claims.
invention makes available precision means for
In the drawings:
accurately guiding the nozzles I4 of the torches
Figure 1` is a plan View illustrating an em.
l2 in paths parallel to the converging »faces at’
bodiment of the invention as combined with a.
of each tooth. and in proper spaced relation
pair of flame hardening torches and the meansV
for supporting them with provision for move
Each torch includes` a water pipe> |18 to convey
ment both longitudinally and transversely of
a coolant which is adapted tol be discharged at
the workV to be Ȗ'ame hardened.
a point to the rear of that where the flame
for guiding a pair of oppositely disposed flame
hardeningtorches along converging straight lines
paralleling the opposite faces of each longitudi
FigureZ is: an enlarged rplan view of the torch 1':
guides' and their supporting means'.
Figure 3 is a. side elevation of the apparatus.
omitting the torches and their supporting
Figure 4 is an end elevation of Figure' 3 as
viewed from the left».`
Figure 5 is a cross-sectional elevation taken.
on line V-V of Figure 3.
Figure 6‘ is a fragmentary detail section on line
VI-VI of Figure 3.
emerges from the nozzle, so` as to quench the work
immediately after subjecting it to the flame
hardening action. »Such` simultaneous llame
hardening and quenching means are. old inthe
art1 and are not claimed herein apart` from thev
combination as shown and described.
Secured to the blow-pipe I3 of each torch is a
clamp bolt
2‘0 22.
end` of each
by means
. is' provided with a half-round notch 24 for en
gagement withl a cylindrical guide rod 218. The
guide rods 26, as best shown in Figure 2, are in
illustrating the invention as applied to the flame
converging relation so that they substantially
hardening of a tapered workpiece such as a bevel
parallel the converging faces t, t’ of the gearl
to be heat treated. The angular position
Referring to the embodiment of the invention fa
of each. guide rod 26 may be varied to suit the
illustrated, reference numeral llly represents a
taper of different gear teeth. To this end I`
movable carriage supporting a pair of. duplicate
rigidly secure fittings 2li` and 3Q adjacent the
oppositely disposed flame hardening torches in
extremities of the guide rodsv 26, thesel ñttingsl
dicated generally at l2, each of which includes
being provided with threaded openings to re
a flame directing nozzle I4. Each flame hard
‘ Figure 'Z is a skeleton view in side elevation,
ceive bolts 32 and 34 which pass through slotsV
36 and 38 formed in a guide rod supporting bar
40 which in turn is secured by fastening means
42 to the extremities of the supporting rod 44.
The rod 44 is of cylindrical stock and is formed
with a ñattened seat 4| at one end for engage
ment with the supporting bar 40 which is of rec
tangular cross section. The rod 44 is adjustably
secured inthe split hub extension 46 of a brack
The invention overcomes the problem by the pro
vision of unique mounting means for the con
verging guides 26-26. These guides are adapted
by means described in detail to beset easily and
quickly in such converging relation that the in
cluded angle between them is substantially the
same as the taper of each tooth of the bevel gear
at the pitch line thereof. Thus when changing
the size of the workpiece or when changing the
et 5U by a clamp bolt 48, the hub being welded
set-up to suit different gears, it is merely neces
or otherwise secured to the bracket. The bracket , _
sary to properly vary the included angle between
50 includes a vertically disposed hub 52 which is ' the guides 26--26. Because the depth of teeth
split at 54 and provided with a clamp bolt 56 _for l von the bevel gears-will vary with different size
adjustably securing the bracket at any desired . gears, the described mechanism is provided with
elevation along the length of a standard 58 which
the means shown and described for adjusting the '
is welded or otherwise secured at its lower end '
toa horizontally movable slide 60 positioned in
a guide groove 62 of a base member 64 which is ` I
-elevation of the guide-supporting rod 44, and for
a similarreason the standard which supports
theguide-carrying rod can also be shifted in a.
Y secured by suitable fastening devices 66 to any
direction toward and from the work.
.fixed structure such as indicated at 68.
20 Thus practically universal adjustment of the
jï l‘Paralleling the standard 58 is a feed screw ‘I8
guides can be easily and quickly made, making
having a rounded lower end -12 seated in a bear
possible the setting of -the'torch guide with great
ing. block 14 carried bythe slide. The feed screw
precision to suit the angularity of a wide variety
10 engages a threaded feed nut portion 16 formed
of teeth of bevel gears of different pitch diame
integrally-on the adjustable bracketl 50. Atits 25 ters and tapers. This is in marked contrast with
upper‘end the feed screw is provided with a col
the prior art practice'which, in so far as I am
lar 'I8 'and with a cylindrical bearing `portion 88,
aware, required the operator to manually guide
the 'latter'passing freely through a bearing lug
the flame hardening ` torch during its travel
82 secured to a cap‘ñtting 84 welded `or 'otherwise
1 secured to the upper extremity of the standard 30
58. LA' hand-Wheel 86 secured to the upper end
of the feed screw >'lll provides meansfor manu
ally adjusting the elevation of the bracket guide
~ rod 44- and the bar 40 secured thereto.
An ladjusting screw 88 engages a suitable
threaded aperture 90 formed in the slide 66, said
screw being rotatably mounted 'in an upstand
` in'g lug 92 formed on the base 64 and carrying a
lengthwise of eachl individual tooth. ,
Y In the machine illustrated, the torch-support
ing carriage moves in a horizontal plane, andthe
rotatable work-holding support has been re
ferred to as inclined to the horizontal. It will be
understood, however, that the entire apparatus
may be turned 90° so'that the carriage can mo've
vertically» without in anyway affecting the mode
of operation of the invention.`
While I have described quite specifically theknurled adjusting knob‘94 which when manip
construction and arrangement ofparts .in the
ulated will serve to shift the slide toward or from 40
embodiment of the invention illustrated, it is tov
the work W which may be regarded as' flxedly
be understood that various modifications and
mounted in a chuck 96 which is arranged to be
substitutions of equivalents may be made by
periodically turned on the axis m--y of the work
those skilled in the art without departure from'
such as_the bevèl'gear illustrated in Figure 7,
so as to successivelybring each tooth into posi- '
tion for flame hardening. The chuck is capable
of `rotary adjustment about axis :v_-y, and is
adapted to be angularly adjusted about a pivotI
pin 98 secured to a suitable chuck base |00 car
the spirit and scope of the invention as defined
in the appended claims.
I claim:
1. Torch guiding means of the character de
scribed, comprising a standard having a bracket
vertically adjustable thereon, a member adjust
rying means such as a 'pivotally mounted bolt 50 able horizontally with respect to said bracket, a`
supporting bar secured to‘ said member, guide,
angular positions to suit the taperof the-partic-rods carrying fittings at> their ends, means ad
ular bevel gear to be heat‘treated.
justably securing said fittings to said supporting
` |02 for ’adjustably holding the chuck in various
" In operation, assuming' that it is desired to
kseparately flame hardeneach individual tapered
tooth of a bevel gear, the gear is rotatably
mounted in a chuck such as shown in Figure ‘7,
bar, followers notched for guiding engagement
with said guide rods, and means yieldingly urg
ing said followers into guiding engagement -with
said guide rods.
with Ythe axis of rotation x-y ofthe gear dis
posedat such angle that the base of the upper
2. Torch guiding means ofthe character de
scribed, comprising a vertical standard, a brack
most tooth lies in a horizontal plane. This is
et slidable therealong having securing means for
desirable since the torch-supporting carriage
clamping it at various elevations, a member slid
moves in a horizontal plane along the horizon
able horizontally in said bracket, means ‘~ for
tally disposed guides I I.
clamping said member in desired positions of ad
’ -The provision of an adjustably mounted work
justment, a supporting bar secured to said mem
holding chuck makes it possible to readily adapt
ber, guide rods carrying fittings at their extrem
the'apparatus for the flame-hardening of difier
ities, means adjustably securing the fittings to
ent tapers of bevel gears without disturbing the
the supporting bar constructed and arranged to
straight-line horizontal travel of the carriage.
provide for variation in the angularity ‘of the
For'the precision flame hardening'of the tapered
guide rods with respect to the supporting bar,`
teeth of a bevel gear, a problem’is involved due
followers notched for guiding erigagement'with
to the taper of the tooth, and this problem be
» said guide rods, and resilient means for-urging
comes more complex by reason of the fact that
said followers into engagement with said guideI
a great number of differently tapered bevel gears
are required to suit various demands of the trade.
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