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Патент USA US2406690

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Aug. 27, 1946. A‘
‘
' .
H. SplNDGE ETAL
'
‘
'
2,406,690.
ILAPPING MACHINE
‘
Filed Oct. 9, 1944
2 Sheets-Sheet '1
74
®
2|
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HERBERT S. IND§E
@songs E. HuLBER-r
Aug. 27, 1946- ,
‘
I
H. s. INDGE .ET AL
LAPPING'
MACHINE
Filed Oct. 9, 19214v
I
2,406,690
‘
2 SheetsfSheet 2
74
Flci. Z
HERBERT S. /ND§‘E
Cizonqs E. HULBERT.
2,406,690
Patented Aug. 27, 1946
PATENT ‘OFFICE
' UNITED
> Herbert S,‘- Indee and George E- Iiulliertl
West:,
Com
‘
bpro,
V
j ' M
$15540“
'
_
Worcester; Mass'.,_ ‘a corporation of lugassar n5
sews '
emerge were ‘9, 19%, wields» 557,253.
6-Qlaims.
(Glen-119i ~
-
sun or‘; ior a rotatahle'lap supporting platen H
This invention relates. w abreding mawieee
and more Particularly t9 manning machine ier
a?‘
\‘ ‘rk'head' l2- ' Th1"
4/ .i ii ?lly sil'p'pbfted
lapping a ‘plane face Qf relatively Small WQIK
*supnortine ‘platen
axreiaiahle'smeer '13
which kevgi‘w the upper; end ‘offa‘ sleeve 14
5
The
$1“ l'liisllfgtatahl‘y ielir‘rialledin a bearing
one Object of the inventien is to. Provide. a
I5 8,61% 3110-199‘ its lower and whi'clh'is in turn sun
simple and thoroughly practical lapping machine
pqrte‘d in a housing ‘ill; The housing l'l' is'?xvedly
for lapping a plane face on a worl; piece; An
, basev ‘ID.’ The upper‘en'd of the
other object of'the invezitibn is to' PFQYiQ? a lap
mailed in a' bearing i8 which is
time ma¢hine for lapping a planeifece 9n a‘wdtk
‘
the 14.91% “r end" oi the hous
piece, in which‘ ea'vch'work piece is independently 10
piece-s.
_
.
v
.
.
.
..
.
.
i
rotated ' while, maintained. ‘in Qneraiive' éngaeer
ivieg. meéhgaism
ment with 5» ‘refers.’ eyratine lapping‘ element
Another object oi'the invention is tdpl‘QYlple a
lapping machine with a work driving head having
which are arranged so that. they may be. 1314"?
pendently moved to engage and drive a-work
>
‘ '
'
he an electric mqtor
m7
1'
the base I? 0i the
art‘? I-- The meter 20 is provided, with
Flier 2.1. w ‘.“éh is. qojrinelcied'bv means
-‘
‘g Pei? ‘23 with. a miller 24! Thé pulley
e pivotally mounted
a plurality of - rotatable "worlgr driving‘ spindles
piece for a lapping'operatidn.
providaifer the lap
' ‘
“
2i
‘?ied <5 roietahle'shalfi .25.- The shaft
A iurther object of the invention is to provide
25 ~1s 'prdvidied with a worm ZS‘whi h in turn
a lapping machine with a work" driving mecha 20 mes-‘hearth
a'wérm gear‘ 21.‘ The we
nism includin'gwa plurality of- p'osi'tivelv mated
work driving 'spindles'each of which may be in- }
iskeyed to the lower an. of the. sleeve. 1
dependently" moved to' ' and ' from an" operative
be'readilyiapparent‘fr
position tokfaoilitate loading- and unloading work‘
'
abovedescribed to'rotate Y
pieces.’ A further- object of‘ the invention is to
provide a lapping machinewith a, work driving
head "having.v a plurality of’ positivelyidriven work
rotating and driving spindleain which the head
is arranged so that it maybe indexed to, facilitate
loadingand unloading-'work» pieces. ‘Other ob;
'
s
r.
.14; the ‘pi er 3
jelidthe lap'silpborting
' DIatenT-IL;
,A lapping‘- plate
"FY" 3015
" provided which rests upon
the upperIsuIr'i-ace'of
30
'laten ”l_ I: ‘ ‘In ordefto
pifod-iioé'a predetermined- apping'action, the‘ lap
ping. plate ‘30 ‘is’ prefer: ‘ 13'; ‘not ‘only rotated'but
jects will be in part obvious or» in part pointed
also’ is f‘give'n 'a ‘combined rater-yam- gyrating
movement to impart ‘the’ de red‘? lapping" action
to the workpieces‘ b_
‘rapped. A‘ plurality of
tures of construction, combinations 'ofelements,
and arrangements of parts, aswill be, exempli?ed 35 syn-iniietriealliarra"gedi’driving pins}! and 32
(pg ,eiablytnrejem“ ?rnb'er, only two of‘which
in the structure to be hereinafter described, and
havebeen’illustrat‘edFigs. l. and 2) are pro‘
the scope'of the application of which will be in
out hereinafter.
'
.
'
1The invention accordingly consists in the fea
dicated in the. following claims.
,
'
VidedtbT'engTag-“e aperturegmthe lapping plate 33.
s '
Thedrivingpin's’o'r ‘studs "31 and '32‘ are eccen
One embodiment .of' this invention has been
and
illustrated in the accompanying drawings in 40 trically mounted on rotatable heads
respeotivelwf ~ a inannerf substantially "the "same
which like reference numerals indicate like parts.
Fig. 1 is a side elevation ,of the improved lap;
as that‘showirfinithe exp,i-redl'o; s. patent to H. s.‘
Ind-geiNo. 1,610,523! dated‘ December " 14', , 1926, to
ping machine having parts broken away: and
which reference‘ may ib‘ehad' for‘ details of ‘dis- '
shown in section to‘ clarify the operating mecha;
nisms of the machine;
"
v
,
Fig. 2 is a fragmentary vertical sectional view,
on an enlarged scale, through the work rotating
and‘clriving mechanism and the lapping wheel;
45
closure'not containea herein. The'hea'djs $3 ‘and
.‘i'éfare~ rotatably? supported on'studs '35 (‘only one
of which-has been illustrated
I)» The
rotary heads’ 33 and ‘34' are provided" with ‘gears
stand 31' whichmesn‘witp a'ige'arts. ' The gear
‘
38 ‘i‘sikeved "to. the upper end of a vnon-1“otatal:)le
Fig. 3.15 va, fragmentary detail View. ofvlthe latchi
shaft 35. ~ The T-Shaft‘73B "is Contained "Within a.
mechanism for holding .the work driving head
against rotation during the normal lapping.‘ op? > hollow. aperture i?ithej'sleeife 1| li'a'rid is supported
and
eration.
VA lapping machine has been illustrated
drawings comprising a base It which serves
at‘its ‘low-er‘ endiby' means of 7a bracket73'9 which
the is ?xedrelative to the-housing ‘H. Y {I‘heigeai‘s ‘3t
as a‘ 55" and 321 also mesh with‘an‘anhular internal ring
2,466,696
4
gear ill which is ?xedly supported relative to the
spider l3. As the spider I3 is rotated by the
driving mechanism above described, the ring gear
89 extends through an elongated slot 89a formed
in the upper end of the sleeve 88.
A' similar driving connection is provided be
45) will impart a rotary motion to the gears 36
UK.
and 81 to revolve the eccentric driving studs 8|
and 32. During this driving movement, the gears
35 and 3'! roll on the stationary center gear 38.
The lapping plate 38 will be given a rotarymotion
due to rotation of the lap supporting platen'll
tween each of the spindles 52 to 651 inclusive
(see, for example, spindle 68).
The sleeve 88 is provided with a driving gear
98 which meshes with a large diameter gear 9!.
The gear I9'! is rotatably supported by anti-fric
tion bearings 82 on the sleeve 48. Each of the
and the heads 33 and 34, and at the same time 10 work rotating and driving spindles 53, 54, 55, 56,
will be given a gyrating motion by meansof the }
57, 58, 59 and 68 is provided with a driven gear
revolving driving studs 3! and 32.
.
93 which meshes with the large gear 9!. These
The work pieces to be lapped are preferably
gears 93 are formed integral with the driving
independently rotated while in engagement with
. sleeves 94 (only one of which has been illustrated
the rotary and gyrating lapping plate 30. The
serves as a bearing support for a vertically mov
in detail in connection with work driving spindle
88). It will bereadily apparent from the fore
going disclosure that rotary motion of the shaft
75 will be transmitted through the gear 83, the
gear 84, the gear 86, the gear 81, the driving sleeve
38, and the gear 98, to rotate the large gear 9|.
able sleeve IZS.
The large gear ?l meshes with the gear 93 on each
machine base It) is provided with an upwardly ex- '
tending column 45 which serves as a support
for an arm 46.
The arm 46 is provided with a
vertically extending cylindrical aperture? which
The sleeve 48 supports a nor
mally-stationary rotatably-mounted work driving
head 49 at its lower end. The head 49 is rotat
ably supported by a pair of roller bearings 58
and ti on the lower end of the sleeve‘ 48. The
head 49 serves as a support for a, plurality of
symmetrically arranged work driving and rotat
ing spindles 52, 53, 54, 55, 56, 51, 58, 59 and 60.
of the remaining work driving and rotating spin
dies 53 to 68 inclusive and will transmit an in
dependent rotary motion to each of the driving
spindles to frictionally rotate a work piece in
operative engagement with the rotary and gyrat
ing lapping plate 38 so as to impart the desired
lapping action to a plane face on the work piece.
Each of the spindles 52' to 88 inclusive is pref
Each of the friction driving members 6| mount
erably provided with a driving member of'a ?ex 30 ed on the lower ends of the work driving and
ible or yieldable material, such as a flexible soft
rotating spindles 52 to’ 68 inclusive is arranged
rubber cup 6| which may be held in frictional
so that it may be moved upwardly to facilitate
engagement with a work piece to be lapped by
removal of a ?nish lapped work piece and the
means of a compression spring 62. The work
insertion of a new piece of work to be lapped.
driving spindle 52 is supported in spaced anti
friction bearings 63 and '64 which are in turn
?xedly mounted in the head 49. The spindle 68
is similarly supportedin'anti-friction bearings 65
' Each of the spindles 52-60 inclusive is provided
with knurled knobs 95, 96, 91, 98, 98, I88, I01,
I62 and I63, respectively. The knob for the spin
dle St is not shownasit is directly behind the
and 68. The remaining spindles are similarly
sleeve H8 in Fig. 2. .
supported, consequently the details of construc 40 When it is desired to remove a ?nish lapped
tion of each spindle have not been illustrated in ’ work piece, the operator may manually raise any
the
drawings.
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A suitable driving [mechanism-‘is provided si
multaneously to rotate all the work driving spin
dles 52-68 inclusive.’ This mechanism may com
prise an electric motor 78 which is mounted on
the rear'end of‘ the arm 46. The motor 18 is
provided with an armature shaft ‘H having a
one of the knobs 95-[03 inclusive so as to raise
~the frictional driving member 8i from driving
engagement with the work piece being lapped,
after which the work piecemay be removed and
a. new work piece inserted in, place underneath
the driving member?l. The spindles 52 to 68
inclusive varejraiseda suf?cient distance so that
multiple V-groove stepped driving pulley 12
the driving pins 89 are raised out of the slots 89a,
mounted thereon. A driving V-belt 13 connects 50, thus disconnecting the spindles so that rotation
the pulley 72 with a multi-V-groove stepped pul-'v
thereof is stopped during a loading operation.
ley 14 which is keyed to the upper end of a ver
tically extending shaft 15. The pulley 14 is pref
The compression of the spring 82. is su?icient to
maintain the driving member Si in frictional
erably supportedby anti-friction bearings, 16 and
driving relation with the work piece to be lapped
l‘! which are ?xedly supported within a bracket 55 and also to produce the desired lapping pressure
18. The bracket 78 is ?xedly mounted relative
between the work piece and the rotary gyrating
to the arm 46 so as to form a rigid support for
lapping wheel 30.
the driven pulley ‘M to prevent the thrust of
In order to facilitate loading and unloading of
the driving shaft from being wholly taken up by
the shaft 15.
.
The shaft 15 passes through a central aperture
19 formed within the sleeve 48 and is rotatably
journalled in bearings 80 and BI which are car
ried by the sleeve 48. The lower end of the shaft
75 is journalled in a thrust bearing, 82 which is
supported by the head 49. A gear 83 is keyed
to the lower end of the shaft 15 and meshes with
a gear 84 which is supported on a rotatable shaft
work pieces, the head 49 is rotatably supported,
60 in the manner above described, on the sleeve 48.
The head 49 is provided with a plurality of radial
ly projecting lugs H35, 106 and It? (only three of
which have been illustrated in Fig. l). A spring
actuated latch I08 is arranged in the path of the
lugs I85, I08 and Ill’! (Figs. 1 and 3). The latch .
or pawl N38 is pivotally supported on a stud I89
which is in turn supported by a pivotally mount
ed arm Hi]. The arm H0 is pivotally supported
85. The shaft 85 also supports a gear 86 which
on a stud i H which is arranged so that the arm
meshes with a gear 81. The gear 81 is keyed 70. I I0 together with the pawl I63 may be swung up
to a rotatable sleeve 88 which serves as a sup;
wardly out of the path of the lugs I35, I06 or Nil.v
port for the work rotating and driving spindle,
The arm, I I0 is provided with‘a stop surface H2
52. A drive is provided between the sleeve 88
which is arranged when in an operative position
and the spindle 52 comprising a driving pin 89
to engage a stop surface H3 which is ?xedly
which, is ?xed to the spindle 52. , The driving pin. 75. mounted on the column 45, so as to support the
2,406,690
5
pawl H98 in an operative position. A tension
spring H4 is provided normally to maintain the
pawl H18 in an operative position. When it is
desired to allow the work head 49 to rotate to
6
tor'holding the pawl H18 out of engagement there.
with until the head 49 has‘ reached the desired
position.
.
,
' It will thus be seen that there hasbeen pro
facilitate loading or unloading of work pieces, the
vided by'this invention apparatus in which the
pawl its is raised out of engagement with the lug
I65, after which the rotary, thrust of the driving
with many thoroughly practical advantages are
various objects hereinabove- set forth together
successfully achieved. As many possible embodie
ments may be made of the above invention and
49 to rotate. 'I‘he pawl Hi8 is immediately dropped
into position after this rotary motion has started 10 as many changes might be made in the embodi
ment above set forth, it is to be understood that
so that it will engage the next log on the hous
all matter hereinbefore set forth or shown in the
ing 49. Or, if desired, the pawl may be held out
accompanying drawings is to be interpreted as
of the path of the lugs H55, IE6 or it? so that the
mechanism above described will cause the‘head
illustrative and not in a limiting sense.
head may be rotated through so", 186° or more, as
15
We claim:
'
desired.
1. In a lapping machine having a base, a lap-7
In order to facilitate raising the‘head 49 to an
inoperative position, the sleeve 48 is provided with
ping wheel having a plane operative lapping face,
to an inoperative position. A manually-operable
pivotally-mounted holding pawl H‘! is provided
having gear teeth formed therein which mesh
rality of positively rotated work driving spindles
means to impart a combined rotating and gyrat
rack teeth H5 which mesh with a rotatable pinion
ing movement to said wheel, a vertically adjust
I it which may be actuated by a hand wheel (not
shown) to raise the entire work drive head 49 20 able hollow spindle, a work head including a plu
with the teeth on the rack bar 15 so that the
which is rotatably supported at the lower end of
said hollow spindle, a spindle driving mechanism
including a drive shaft rotatably supported. with
sleeve (‘it may be held in the desired adjusted po
sition.
in said hollow spindle, gearing within said head
connecting said drive shaft with each of said
surface‘ which serves as a positive stop. A'bracket
tional driving engagement ‘with a work piece to
I2! ‘is fixedly mounted relative to the head fit.
A stop rod !22 is ?xedly connected to the bracket
i2l and is provided at its upper end with a stop
rotate the same While in lapping engagement with '
said lapping wheel at a predetermined pressure.
6| from driving engagement with the work piece,
after which the lapped work piece may be readily
sleeves, a work driving spindle slidably'mounted
spindles simultaneously to rotate said spindles,
operative
In orderposition,
precisely
a positive
to locate
stop
themechanism
head 49 inmay
a yieldable frictional work driving member on
each of said spindles, and independent yieldable
lie-provided comprising a bracket E23 which is
?xed relative to the arm (‘46 having an upper plane 30 means normally'to maintain said spindles in fric
2. In a lapping machine having a base, a lap
collar I23 which is screw threaded onto the 35 ping wheel having a plane operative lapping face,
means to impart a combined rotating and gyrat
threaded end portion I24 of the rod [22. A look
ing movement to said wheel, a vertically adjust
collar i25 is provided to lock the collar 123 in ad
able hollow spindle, a work head including a plu
justed position.
rality of positively rotated work driving spindles
The operation of this improved lapping ma
chine will be readily apparent from the foregoing 40 which is rotatably supported at the lower end
of said hollow spindle, a spindle driving mecha
disclosure. The lapping machine is set in motion
nism including a drive shaft rotatably supported
by starting the electric motors 25 and ‘Ill. The
within said hollow spindle‘, gearing within said
starting of the electric motor 28 serves in the
head connecting said drive shaft with each of
manner above described to impart a combined
rotary and gyrating movement to the lapping 45 said spindles simultaneously to rotate said
spindles, the thrust of said drive gearing normally
plate so. The starting of the electric motor ‘Iii
tending to rotate said work head, a plurality of
serves to transmit a rotary motion to all the work
stop lugs on said head, and a stop pawl normally
rotating and driving spindles. In order to load
to hold said head against rotation, said stop pawl
work pieces in the machine, the knobs 95-403
inclusive are independently raised and a work 50 being pivotally mounted to facilitate indexing the
work head for loading and unloading work pieces.
piece inserted in position under, the driving mem
3. In a lapping machine having a base, a lap
ber Bl, after which the knob is released and the
ping wheel having a plane operative lapping face,
released compression of the spring 62 will serve
means to impart a combined rotating and gyrat
to maintain the driving element iii in frictional
driving engagement with the work piece to be 55 ing movement to said lapping wheel, a vertically
adjustable hollow spindle, a work head rotatably
lapped to rotate the work piece in operative con
mounted on the lower end of said spindle, a plu
tact with the rotary and gyrating lapping plate
rality of hollow driving sleeves rotatably sup
39. The lapping operation on the work pieces is
ported on said head and having their axes parallel
continued to the desired and predetermined ex
tent. When it is desired to remove a work piece 60 to said hollow spindle, a drive shaft rotatably
supported in said spindle, gearing within said
from the machine, it is merely necessary for the
work head connecting said drive shaft with each
operator to raise one of the knobs 95403 in
of said driving sleeves positively to rotate said
clusive to withdraw the frictional driving element
removed from the machine and a new work piece
inserted there instead.
-
After the spindles adjacent to the operator’s
station have been loaded with work pieces, the
latch or pawl I08 may be raised out of engage
ment with the lug [05 so as to allow the head 49
to rotate to bring other work spindles into posi
in each of said sleeves, a yieldable frictional work
driving member on each of said spindles, a com
pression spring normally to maintain said member
in frictional driving engagement with the work
piece to maintain it in operative lapping engage
ment with said lapping wheel at a predetermined
pressure, a driving pin on each of said spindles
normally engaging a slot in each of said sleeves
to drive said spindles, and a manually operable
tion adjacent to the operator’s station. As above
means including a knob rotatably mounted on
described, the head 48 may be rotated through
either 90°, 180° or 270", depending on the opera 75 the upper end of each of said spindles to facilitate
2,406,690
7
8
moving said spindles independently to an inop
erative position to facilitate loading and unload
sleeves continuously to rotate, all of said sleeves,
ing work pieces.
of said sleeves, a work driving member on each of
,
4. In a lapping machine havinga base, a lap
an axially movable work drive spindle within each
said work drive spindles, a driving pin on each
ping wheel having a plane operative lapping face, 5 of said work drive spindles which is engageable
means to impart a combined rotating and gyrat
with a slot in each of said hollow sleeves, and
ing movement to said wheel, a vertically adjust
able hollow spindle, a work head including a plu
independent manually operable means to disen
gage said drive pin to stop said work drive spindle
to facilitate removal of the ?nish lapped work
rality of positively rotated hollow work, driving
sleeves which is rotatably supported at the lower
end of said hollow spindle, a sleeve driving mech
piece.
6. In a lapping machine having a base, a lap
anism including a drive shaft rotatably ' sup
ping wheel having a plane operative lapping face,
ported within said hollow spindle, gearing with
means to impart a combined rotating and gyrat
in said head connecting said drive shaft with
each of said sleeves continuously to rotate all of
said sleeves, an axially movable work driving
spindle within each of said hollow sleeves, a
work driving member on each of said work drive
spindles, a driving pin connecting each of said
ing movement to said lapping wheel, a vertically
adjustable hollow spindle, a work head including
a plurality of positively rotated work driving
spindles which is rotatably supported at the lower
end of said hollow spindle, a spindle driving
mechanism within said head including a drive
shaft rotatably supported within said hollow
spindle, gearing within said head operatively con
meeting said shaft with all of said spindles posi
tively and simultaneously to rotate all of said
spindles with said sleeves, and independent
manually operable means to raise each of said
work drive spindles to disconnect it from its driv
ing sleeve when it is desired to remove a ?nish
lapped work piece.
5. In a lapping machine having a base, a lap
ping Wheel having a plane operative lapping face,
means to impart a combined rotating and gyrat
ing movement to said wheel, a vertically adjust
able hollow spindle, a work head including a plu
rality of positively rotated hollow work driving
sleeves which is rotatably supported at the lower
end of said hollow spindle, a sleeve driving mech
anism including a drive shaft rotatably supported
within said hollow spindle, gearing within said
head connecting said drive shaft with each of said
spindles, a yieldable friction work driving mem
ber on each of said spindles, independent yield
able means normally to maintain each of said
driving members in frictional driving engagement
with the work piece to rotate the same while in
lapping engagement with the lapping wheel at a
- predetermined pressure, and independent manu
ally operable means to withdraw said spindles to
an inoperative position to facilitate loading and
unloading Work pieces.
HERBERT S. INDGE.
GEORGE E. HULBERT.
35
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