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Патент USA US2130478

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Sept.__20, 1938..
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A. R. ALLARD.
v
2,130,478
MACHINE FOR BLADING TURB_INE ELEMENTS
Filed Jan. 21, 1937
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INVENTOR
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HRTHURR. Hunnn
BY a" 05 I W
ATTORNEY
Sept. 20, 1938.
A_ R‘; ‘ALLARD
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2,130,478
MACHINE FOR BLADING TURBINE ELEMENTS
Filed Jan. 21, 1937 '
WITNESSES:
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INVENTQR
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ATTORNEY
Patented Sept. 20, 1938
2,130,4l8
UNITED STATES EPATENT QFFECE
2,130,478
MACHINE FOR BLADING TURBINE
ELEMENTS
Arthur R. Allard, Drexel Hill, Pa, assignor to
Westinghouse Electric 8; Manufacturing Com
pany, East Pittsburgh, Pa", a corporation of
Pennsylvania
Application January 21, 1937, Serial No. 121,381
15 Claims. ' (01. 29-235)
My invention relates to a machine for blading
turbine elements and it has for an object to pro
vide apparatus of this character wherein blading
elements are packed or placed due to impact of a
blading element with a previously assembled blad
ing element and brought about by relative’ for
ward motion, from a starting position, of the
turbine element with respect to an anvil element,
the turbine and anvil elements having relative
10 motion in the other direction to return them to
starting position.
A further object of my invention is to- provide
a machine for blading a turbine element and
which has a continuously operating driving motor
whose energy is utilized to secure relative mo
tion of turbine and anvil elements in forward and
‘return directions, whereby the full torque of the
motor is effective to secure rapid acceleration of
the forward motion and adequate impact for
to o
packing blading elements in place.
A further object of my invention is to provide
a machine for blading a turbine element having
an undercut groove within which extends an anvil
element, these parts normally occupying relative
ly a starting position at which the blading ele
ments may be inserted into a suitable entrance
of the groove, together with a motor and mech
anism for deriving energy from the motor for
bringing about relative motion of the turbine ele
ment and the anvil in forward and return direc~
tions, the motion in the forward direction moving
a blading element along the groove from the en
trance to engage a previously assembled blading
element, whereupon energy. of the moving ele
ment is absorbed in packing the blading ele
ment in place and then, due to energy absorbed
by the mechanism during forward motion, the
moving element is returned to starting position.
A further object of my invention is to provide
a turbine blading machine having a driving motor
together with mechanism for securing relative
forward and return motion of parts to effect
traversal and packing of blading elements to
gether with means for retarding the return mo
tion as starting position is approached.
These and other objects are effected by my in
vention as will be apparent from the following .
description and claims taken in connection with
the accompanying drawings forming a part of
i this application, in which:
Fig. 1 is a plan view of my improved apparatus;
Fig. 2 is a side elevational view of the apparatus
shown inFig. 1;
Fig. 3 is a plan view of an alternative arrange
ment wherein the anvil member is given forward
and return motion;
Fig. 4 is a sectional view taken along the line
IV—IV of Fig. 3;
Fig. 5 is a detail sectional view of the groove
60
operating mechanism;
Figs. 6 and 7 are diagrammatic views pertinent
to the ?rst embodiment and showing the rotor
in different positions;
Figs. 8, 9; 10, and 11 are detail views showing an _
undercut groove and blading elements;
Fig. 12 is a transverse sectional view of the en
ergy storage device; and
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Fig. 13 is a transverse sectional View showing
the braking mechanism.
Referring now to the drawings more in detail, V10
in Fig. 1 there is shown a machine provided with
a stationary supporting structure or frame in
cluding a bedplate l0 having supporting bearings
ll for the arbor l2 arranged to have a turbine .
element I 3 mounted thereon.
15
The turbine ele
ment has an undercut groove or grooves l4
therein, within which is arranged to extend the
anvil l5 carried by the pedestal l6 mounted on
the bedplate ill, the anvil being arranged to be .
fed into and retracted from the undercut groove :20
14 by suitable feed means I5a.
Each groove has a recess H (see Figs. 8 and 9),
or open end, for the insertion of blading ele
ments, the term “blading element” being used ,
herein to designate both the blades 13a and the
packing pieces l3b which are inserted between ad~
jacent blades to provide proper spacing thereof.
Normally, as shown in Fig. 6, the rotor element
occupies such a position relatively to the anvil T
that the entrance recess is accessible for insertion '30
of blading elements. After a blading element is
inserted, the turbine rotor is moved in a direction
to cause the anvil member to push the blading
element along the groove until the latter is
brought into engagement with a previously as- '
sembled blading element (Fig. 7) , whereupon the
energy stored in the arbor and the rotor is ef
fective to secure ?rm packing of the blading ele
ment in place. After forward motion of the
rotor and. the arbor and packing of the blading
element, the arbor is given return motion to bring
the rotor back to starting position, the latter being
determined by cooperating abutments I3 and I9
carried by the arbor at I21; and the support Iii,
respectively. The arbor l2 also has a hand wheel
I21) which can be used for manually packing the
"40
initial group of turbine elements.
The machine frame Ill also has mounted there
on a motor 20, which normally operates continu
ously in one direction to effect blading operations.
The motor 20 turns the driving element 2!
continuously in one direction, the driving ele
ment being alined with the arbor l2. A fric~
tional clutch 22 is provided for connecting and
disconnecting the arbor and the driving member.
The clutch‘22 is arranged to be connected to
effect movement of the blading element along a
blade groove and packing thereof in place, where
upon the clutch is disconnected and the energy 60
2
2,130,478
storage device 23 then becomes effective to return
the arbor to starting position.
with a brake 43 which is operated magnetically.
As shown in Fig. 13, the brake 43 is operated
to check the speed of the rotor I3 as the end
of the return motion is approached. Brake 43
means, for example, the operating cylinder 24 ‘ is‘ connected by suitable linkage 44 to a solenoid
The clutch 22 is preferably of the ordinary fric
tional type and its operation is controlled by
having a piston 25 (see Fig. 5) therein connected
to a rod 26, which is used to actuate the clutch.
A spring 21 is held against the upper side of the
piston 25, compressed air being admitted to'the
10 cylinder below the piston by means of the supply
line 28 connected to the valve housing 29, the
latter having connected thereto the high pres
sure air line 30 and the exhaust line 3|.
A valve
32 is arranged in the housing and it is operative
15 to establish communication between the supply
line 28 and the high pressure line,30 to admitair
under high pressure below the piston 25 to raise
the latter against the force of the spring 21,and
to establish communication of the line 28 with
20 the exhaust 3|, whereupon air in the cylinder be
low the piston25 is exhausted and the piston
moves downwardly due to‘the‘ force of the spring
21.
Upward movement of the valve '32 to.connect
25 the line 28 with the exhaust 3| is effected by
means of the core 33 of ‘the solenoid,.at 34, the
latter being energized by closure of ‘the switch, at
35 (see Fig. 2). Therefore, to connect the clutch
and to drive the turbine element in aforward
30 direction, the operator closes the switch, at 35,
thereby energizing the solenoid, at‘ 34, connecting
the cylinder 24 to the exhaust, and permitting
the. spring 21 to connect the clutch 22.
Assuming that the arbor and the rotor carried
35 ‘thereby are in starting position and that the
clutch is connected, then the motor 20, operating
at normal speed, is effective to secure-rapid ac
celeration ,of the arbor and of the rotor; - and not
only is the acceleration rapid but the full torque
The energy of the mov
ing turbineelement is utilizedfor packing a blad
ing element in place. When the blading element
being .inserted strikes the precedingblading ele
40 of the motor isapplied.
ment, the clutch slips andis then;immediately
If desired, only the packing’ pieces may
be packed with full force, the blades beingmerely
45 released.
50
45, the latter being controlled by a switch 46.
Switch 46 is operated by a lever 41. Assuming
therotor is being returned to its starting position
bymeans of the spring 39 in energy storage de
vice 23, the abutment I8 on the arbor l2a hits 10
the switch operating lever 41, thereby turning it
in clockwise direction and the closing switch 46.
As the solenoid 45.is pulled down, the linkage 44
forces the brake 43 against the brake shoe 43a
which is attached to the arbor, thus checking the
speed. After the abutment has passed over the
switch operating lever 41, the latter swings back
to its original position, thus deenergizing the cir
cuit and releasing the brake. The brake does
not completely stop the arbor but merely slows it
down su?iciently so that there will be no rebound
when the abutment 18 hits stationary abutment
l9 in returning to starting position. It can be
seen that, as the arbor starts on its packing
stroke, the abument l8 tilts the switch operating 25
lever in the opposite direction and is not effec
tive to close the switch 46 to operate the solenoid
45. The abutment i8 is made adjustable so that
the starting position may be varied. The circuit
preferably includes an additional switch 49 which
may be manually actuated to render the brake
ineffective.
Referring to Figs. 6 and '7, the rotor I2 nor
mally occupies the starting position shown in Fig.
6 where the entrance opening I1 is disposedim
mediately above the anvil opening for the inser
tion of blading elements, the rotor having the
requisite number of blading elements 48 mounted
therein manually at the end of the slot. to provide
an abutment against which blade elements are
packed. As soon as a blading element is inserted
in the entrance notch, the clutch is connected;
and, as the motor is operating at full speed and
under full torque, the arbor and the rotor are
rapidly accelerated in the forward direction re
sulting in su?icient kineticenergy being stored
moved/into position againstthe: preceding pack
therein for packing purposes as theend of the
ing pieces without great impact, which may be
accomplished by releasing theclutch'as the ‘blade
forward travel .decreasing, of course, as more
approaches the previously mounted packing piece.
After the step of packing or positioning, the
turbine element is moved in the return direction
to startingposition, the return movement being
effected by means of the energy storage device 23,
which derives energy from themotor 20 during
forward motion of the arbor and of the rotor
element.
As shown, the arbor l2 carries a drum 36
around which is wrapped the cable 31, and, as
60 shown in Fig. 12, the lower end of the cable being
wrapped about the drum 38 of the energy storage
device, the drum 38v containing a spiral spring 39
whose outer end is connected to the interior of
the drum and whose inner end is connected to a
forward motion is reached, the length of the
and more blading elements arepacked into place. 50
The operation of packing dueto impact may be
seen from Fig. 7.
While, in.Figs. 1, 2, 6, and 7,,there is shown a
turbine disk which is given forward and return
motion, it will be obvious that the turbine ele~
ment may be stationary and the anvil moved.
Accordingly, in Figs. 3 and 4, there is shown a
stationary turbine element 50 having undercut
grooves 55 for the reception of blading elements,
at 52, comprised by blades 53 .and packingpieces
54, as heretofore described. An arbor 55 is car
ried by the bearings 56 of the turbine element 50
and it has an anvil 51. adjustable to extend into
the undercut grooves 5| to a desired extent, the
support 40. During forward motion of the arbor
and of the rotor, the spring 39 is loaded more
and‘more; and,‘just'as soon as the clutch 22 is
released, energy of the spring is available to
effect return motion of the arbor and of- the rotor.
As 'thearbor and the rotor return to starting
70
anvil being adjustable both radially and axially
of the arbor 55. Radial adjustment is effected
by means of the connection, at 58, and axial and
circumferential adjustments are secured by
means of the strap connection 59.
As with the ?rst. embodiment, a continuously 70
minimize shock and any tendency to rebound
ofthemovingpart. Accordingly, the rotor l3'is
held'in starting position by means of the energy
75 storage device'and the arbor'has associated there
the motor being connected to the arbor by means
of a clutch l6a to effect forward motion of the
anvil 51 and the clutch beingdisconnected‘to
effect return motion of the anvil, connection and
65
position, the-rotor-motion should be retarded to
operating, uni-directional motor l4a is employed, .
2,130,478
disconnection being effected by means of the
operating cylinder l8a and return motion being
brought about by the energy storage device at Ila.
In the embodiment shown in Figs. 3 and 4,
when a groove is to be cleared, the end of the
groove opposite to the entrance end ?rst has
blading elements manually packed therein suffi
ciently to aiTord adequate backing for the en
suing mechanical operations of blading element
packing. The anvil 5? is properly adjusted to ?t
the groove and it is adjusted circumferentially of
the arbor 55 so as to clear the entrance end of
the groove 5i to provide for insertion of blading
elements. After a blading element is inserted in
the groove, the clutch l?a is connected, where
upon the full motor speed and torque are eiTec
tive to rapidly accelerate the arbor and the an
vil to move the blading element along the groove
and then to pack the latter by impact adjacent to
a previously assembled blading element. When
the anvil has reached the packing position, the
operator releases the clutch whereupon the en
ergy storage device Ila becomes effective to move
the arbor and the anvil in return direction to
starting position.
While I have shown my invention in several
forms, it will be obvious to those skilled in the art
that it is not so limited, but is susceptible of var
ious other changes and modi?cations without de
parting from the spirit thereof, and I desire,
therefore, that only vsuch limitations shall be
placed thereupon as are imposed by the prior art
or as are speci?cally set forth in the appended
claims.
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preceding assembled blading element, and means
for releasing said driving means when said tur
bine and anvil elements approximately reach the
relative position where a blading element is
packed against the preceding one and for render
ing said energy storage device effective to produce
relative movement of the turbine and anvil ele
ments in a return direction to starting position.
3. In a machine for blading a turbine element
having an undercut groove provided with an en 10
trance for the reception of blading elements and
the groove having a su?icient number of blades
assembled therein remote from the‘entrance end
to form a backing for other blading elements, an
anvil element arranged to extend into the groove, 15
means for feeding the anvil element into and re
tracting it from the groove, means constraining
said turbine and anvil elements to occupy nor
mally a predetermined relative starting position
with the groove entrance adjacent to the anvil 20
element and between the latter and the previously
assembled blading elements, means for effecting
relative movement of the turbine and anvil ele
ments in a forward direction for storing energy
in said energy storage device and for pushing a 25
blading element along the groove and packing it
in place in abutment with the immediately pre
ceding assembled blading element, and means for
releasing said driving means when said turbine
and anvil elements approximately reach the rela 30
tive position Where a blading element is packed
against the preceding one and for rendering said
energy storage device e?ective to produce relative
movement of the turbine and anvil elements in a
What I claim is:
> return direction to starting position.
1. In a machine for blading 'a turbine element
4. In a machine for blading a turbine element
having an undercut groove provided with an en
having an undercut groove provided with an
trance for the reception of blading elements, an
anvil element arranged to extend into the groove,
40 means constraining said turbine and anvil ele
ments to occupy normally a predetermined rela
tive starting position at which blading elements
are inserted into the groove entrance, an energy
storage device, means for effecting relative move
ment of the turbine and anvil elements in a ior—
ward direction for storing energy in said energy
storage device and for pushing a blading element
along the groove and packing it in place in abut
ment with the immediately preceding assembled
blading element, and means for releasing said
driving vmeans when said turbine and anvil ele
ments approximately reach the relative position
where a blading element is packed against the
preceding one and for rendering said energy stor
age device effective to produce relative move
ment of the turbine and anvil elements in a re
turn direction to starting position.
2. In a machine for blading a turbine element
having an undercut groove provided with an
60 entrance for the reception of blading elements
and having a sui?cient number of blades as
sembled in the groove remote from the entrance
to form a backing for other blading elements,
an anvil element arranged to extend into the
groove, means constraining said turbine and an
vil elements to occupy normally a predetermined
relative starting position with the groove en
trance adjacent to the anvil element and between
the latter and the previously assembled blading
elements, an energy storage device, means for
effecting relative movement of the turbine and
anvil elements in a forward direction for storing
energy in said energy storage device and for push
ing a blading element along the groove and pack
ing it in place in abutment with the immediately
entrance for the reception of blading elements
and having a su?icient number of blades assem
bled in the groove remote from the entrance to
form a backing for other blading elements, an
anvil element arranged to extend into the groove,
means constraining said turbine and anvil ele
ments to occupy normally a predetermined rela
tive starting position at which blading elements 45
are inserted into the groove entrance, an energy
storage device, means for ‘effecting relative move
ment of the turbine and anvil elements in a for
ward direction for storing energy in said energy
storage device and for positioning a blading ele 50
ment along the groove and packing it in place
in abutment with the immediately preceding as—
sembled blading element, means for releasing
said driving means when said turbine and anvil
elements approximatelyreach the relative posi 55
tion where a blading element is packed against
the preceding one and for rendering said energy
storage device eifective to produce relative move
ment of the turbine and anvil elements in a re~
turn direction to starting position, and means for
effecting a braking action to retard relative re
turn movement of the elements as starting posi
tion is approached.
5. In a machine for blading a turbine element
having an undercut groove provided with an en
trance for the reception of blading elements and
65
having a su?icient number of blades assembled
in the groove remote from the entrance to form
a backing for other blading elements, an anvil
element arranged to extend into the groove, said 70
turbine and anvil elements normally occupying
relatively a starting position at which blading
elements are inserted into the groove entrance,
an energy storage device, means for effecting rel
ative movement of the turbine and anvil elements 75
4
2,130,478
in aforward direction for storing energy in said
energy storagev device andfor positioning ablad
ing element along ;the groove and packing it in
anvil occupying a starting position with the
groove entranceat a predetermined location for
the insertion of blading elements, a driving mo
place in abutment with the immediately preced
ing, assembled bladingelement, meansfor releas
tor, means including a clutch which when en
ing said driving means when said turbine and
anvil elements approximately reach the relative
position where a blading element is packed
a forward direction so that the anvil may'hold
against the preceding one andfor rendering said
energy storage device e?ective to produce relative
movement of the turbine and anvil elements in
areturn direction to starting position, and means
responsive to relative return movement of the
turbine and anvil elements for retarding such
15 movement as starting position is approached.
G. In a machine for blading a turbine rotor
element having an undercut groove for the recep
tion of blading elements, a supporting frame
structure having bearings, an arbor carriedby
the bearings for supporting a rotor element, an
anvil arranged to extend into the groove of the
rotor element, relatively adjustable stops. on the
arborand frame structure constraining said tur
bine and anvil elements to occupy normally a
starting position with the rotor element disposed
so that the entrance to'the groove occupies a
predetermined position for the insertion of blad
ing elements, mechanism for imparting forward
and return rotary motion to the arbor, said
mechanism including a clutch for rotating the
arbor in a forward direction with the anvil hold
ing a blading element for relative movement
along-the groove, the energy of the arbor and
of the rotor-being utilizedyupon impact of apre
viously assembledblading element-with the blad
ing elementheld' by the anvil to cause deforma
tion of the latter blading element in order to pack
it in place adjacent to the previously packed
blade element, and said mechanism including
means for releasing said clutch for effecting ro
tation of the arbor in a return direction to start—
ing position.
'7. In a machine for blading a turbine rotor
element'having an undercutgroove for the re
ception of blading elements, an arbor for carry
ing arotor element, an anvil arranged to extend
into the groove of the rotorrelement, means con
straining said arbor and the anvil to occupy nor
mally a starting position with the rotor element
disposed so that the entrance to the groove occu
pies a predetermined'position for the insertion
ofpblading elements, .a motor, a clutch between
the‘ motor and the arbor and effective for causing
the motor to turn the arbor in a forward direc
55 tion so that the anvil may hold a blading element
for movement along the groove and so that en
ergy of the arbor and of the rotor may be utilized
when impact of a previously assembled blade ele
ment occurs with theblading element held by
the anvil to cause deformation of the latter blad
ing element in order to pack it in place adjacent
to the previously packed blading element, control
mechanism for the clutch effective normally to
hold the clutch disconnected and including
65 means operative‘to effect connection thereof so
that the motor may drive the arbor, and means
effective to turn the arbor in a return direction
when the clutch is released.
8. In a machine for blading a turbine'rotor
70 element having an undercut groove for the re
ception of blading elements, an arbor for carry
ing a rotor element, an anvil arranged to extend
into the groove, means for feeding the anvil into
andretracting it from- the groove, adjustable
75 means providing for the rotor element and the
gaged results in the'motor turning the arbor'in
a blading element for movement along the groove
until it contacts with a previously assembled
blading element whereupon energy of the rotor
and arbor is e?ective to cause packing ‘of the 10
blading element in the groove, and control mech
anism for the clutch effective normally to hold
the latter released and including means opera
tive to e?ect its connection to cause the motor
to drive the arbor and the rotor element in a 15
forward .direction and means effective when the
clutch iszreleased after forward turning of the
arbor and the rotor element for returning the
latter to starting position.
9. In a ’machine for blading a turbine rotor
element having an undercut groove for the recep
tion of blading‘elements, an arbor for carrying
a rotor element, an anvil arranged to extend into
the groove, means for feeding-the anvil into and
retracting it from the groove, means providing 25
for the rotor element and the anvil occupying a
starting position with the groove entrance at a
predetermined location for the‘insertion of blad
ing elements, a driving motor, means including
a clutch for causing the motor to turn the arbor 30
in a forward direction so that the anvil may‘hold
a blading element .for movement along the groove
until it ‘contacts witha previously assembled blad
ing element whereupon energy of the. rotor
and arbor is effective to cause packing of the 35
blading elementin- the groove, control mecha
nism for the clutch and e?ective normally to
hold the latter-released and including means op
erative to effect itsconnection to cause the motor
todrive the arbor-and the rotor element in a for 40
ward direction, means ‘e?ective when the clutch
is released after forwardturning of the arbor
and the rotor'for returning the latter to starting
position, and‘ means for retarding the return mo
tion of the arbor and the rotor as starting position 45
is approached.
10. In a machine for blading a turbine rotor
element having an undercut groove for the re
ception of blading elements, an arbor for carry
ing a rotor element, an anvil arranged to ex 50
tend into the groove, means for feeding the anvil
into and retracting it from the groove, adjustable
means providing for the rotor element and the
anvil occupying a starting position with the
groove entrance at avpredetermined location for 55
the insertion of blading elements, a unidirec
tional rotary'driving element, a clutch between
said element and the arbor for causing the driv
ing element to‘ turn the arbor in a forward direc
tion so that the anvil may hold a blading ele 60
ment for movement along the groove until it con
tacts with a previously assembled blading element
whereupon energy of the rotor and arbor is
e?ective to cause packing of the‘ blading element
in the groove, means for engaging and disengag~
ing the clutch and e?ective normally to hold
the latter released, said clutch when engaged
causing the driving element to drive the arbor
and the rotor element in a forward direction, and
means providing for the storage of energy de 70
rived from the driving element during forward
motion of the arbor and effective, when the clutch
is released, to return the arbor and the rotor
element to starting'position.
1,1. In a machine .for blading a turbine rotor 75
2,130,478
element having an undercut groove for the re
ception of blading elements, an arbor for carry
ing a rotor element, an anvil arranged to extend
into the groove, means for feeding the anvil into
UK and retracting it from the groove, adjustable
means providing for the rotor element and the
anvil occupying a starting position with the
groove entrance at a predetermined location
for the insertion of blading elements, a driving
10 motor, means including a frictional clutch for
causing the motor to turn the arbor in a for
ward direction so that the anvil may hold a
'5
diately preceding assembled blading element, and
means for releasing said driving means when
said turbine and anvil elements reach approxi
mately the relative position where a blading ele
ment is packed against the preceding one and
for rendering said energy storage device e?ective
to produce relative movement of the turbine and
anvil elements in a return direction to starting
position.
14. In a machine for blading a turbine element 1O
having an undercut groove provided with an en
trance for the reception of blading elements, sta
tionary structure, an arbor carried by said struc
blading element for movement along the groove
until it contacts with a previously assembled
15 blading element whereupon energy of the rotor
ture for supporting a turbine element, an anvil
and arbor is effective to cause packing of the
blading element in the groove, control mechanism
the groove, an energy storage device, means for
for the clutch and effective normally to hold the
latter released and including means operative to
effect its connection to cause the motor to drive
the arbor and the rotor element in a forward
direction, and means including a spring whose
load is increased by the forward motion of the
arbor and the rotor element and effective, when
the clutch is released, to return the arbor and
the rotor element to starting position.
12. In a machine for blading a turbine rotor
element having an undercut groove for the re
ception of blading elements, an arbor for carry
30 ing a rotor element, an anvil arranged to extend
into the groove, means for feeding the anvil into
and retracting it from the groove, means pro
viding for the rotor element and the anvil occupy
ing a starting position with the groove entrance
35 at a predetermined location for the insertion of
blading elements, a driving motor, means includ
ing a clutch for causing the motor to turn the
arbor in a forward direction so that the anvil
may hold a blading element for movement along
40 the groove until it contacts with a previously
assembled blading element whereupon energy of
the rotor and arbor is effective to cause packing
of the blading element in the groove, control
mechanism for the clutch and effective normally
45 to’hold the latter released and including means
operative to effect its connection to cause the
motor to drive the arbor and the rotor element
in a forward direction, means effective when the
clutch is released after forward turning of the
50 arbor and of the rotor element for returning the
latter to starting position, and means for retard
ing return motion of the arbor and- the rotor as
starting position is approached.
13. In a machine for blading a turbine element
55 having an undercut groove provided with an en
trance for the reception of blading elements, a
supporting frame structure having bearings, an
arbor carried by the bearings for supporting a
turbine element, an anvil arranged to extend into
60 the groove, means providing for the turbine and
anvil elements occupying a starting position with
the groove entrance at a predetermined location
carried by said structure arranged to extend into 15
eifecting relative movement of the turbine and
anvil elements in a forward direction for storing
energy in said energy storage device and for push
ing a blade element along the groove and packing 20
it in place in abutment with the immediately pre
ceding assembled blading element, means for re
leasing said driving means when said turbine and
anvil elements reach approximately the relative
position where a blading element is packed 25
against the preceding one and for rendering said
energy storage device effective to produce rela
tive‘ movement of the turbine and anvil elements
in a return direction to starting position, braking
means for retarding relative return movement of
the elements as starting position is approached,
means including parts carried by the arbor and
by the stationary structure to provide for the
turbine and anvil elements occupying a starting
position with the groove entrance at a predeter
35
mined location for the insertion of the blading
elements, and means including said arbor-carried
part of the last-named means for rendering the
braking means e?ective before starting position
is reached.
40
15. In a machine for blading a turbine element
having an undercut groove provided with an en
trance for the reception of blading elements, an
arbor for supporting a turbine element, an anvil
arranged to extend into the groove, an energy 45
storage device, means for effecting relative move
ment of the turbine and anvil elements in a for
ward direction for storing energy in said energy
storage device and for pushing a blading ele
ment along the groove and packing it in place 50
in abutment with the immediately preceding as
sembled blading element, means for releasing said‘
driving means when said turbine and anvil ele
ments reach approximately the relative position
where a blading element is packed against the
preceding one and for rendering said energy stor
age device effective to produce relative move
ment of the turbine and anvil elements in a re
turn direction to starting position, braking means
for retarding relative return movement of the 60
elements as starting position is approached, stop
65 of said stop members being ?xedly carried by the
means providing for the turbine and anvil ele
ments occupying a starting‘ position with the
groove entrance at a predetermined location for
the insertion of the blading elements and com
prising cooperating stop members, one of said
stop members being carried by the arbor and be
thereof, an energy storage device, means for ef
fecting relative movement of the turbine and an
70 vil elements in a forward direction for storing
energy in said energy storage device and for
pushing a blading element along the groove and
means for rendering the braking means effective
before starting position is reached for all posi 70
for the insertion of the blading elements, said
means comprising cooperating stop members, one
supporting frame and the other being carried by
the arbor and being adjustable circumferentially
packing it in place in abutment with the imme
ing adjustable circumferentially thereof, and
tions of adjustment of the adjustable stop mem
ber and including said adjustable stop member.
ARTHUR R. ALLARD.
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