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Патент USA US2409115

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Oct.. 8, 1946.
A. M; BRAKE
2,409,113
. GAUGE LAPPING MACHINE
`Filed June 27. 1944
»
4 sheets-sheet 1
Oct. 8, 1946.
,¢\_k M_ BRAKE
2,409,113
GAUGE LAPPING MACHINE
Filed June 27, 1944 '
Egea’
4 sheets-smeet s
Get. 8, 1946.
A. M. DRAKE
GAUGE LAPPING MACHINEl
2,409,1 l 3
Filed June 27, 1944
4 Sheets-Sheet 4
/4
È
/
f M
2,409,113
Patented Oct. 8, 1946
UNITED STATES PATENT OFFICE
2,409,113
GAUGE LAPPING MACHINE
Alden M. Drake, West Hartford, Conn., assignor to
Niles-Bement-Pond Company, West Hartford,
Conn., a corporation of New Jersey
Application June 27, 1944, Serial No. 542,288;
11 Claims. (C1. 51-64)
l
2
snap gauge having opposed flat parallel work
parts of a lapping machine made in accord
ance with the present invention and showing a
standard form of adjustable snap gauge in posi
tion for lapping operations upon its gauging
engaging surfaces.
surfaces.
'I'his invention relates to lapping machines
and particularly to a machine for lapping
gauging surfaces such as those of an adjustable
More in particular the invention relates to a
lapping machine for flat parallel surfaces in
cluding means for mechanically holding a work
piece in position with its surfaces being lapped
,
Fig. 2 is a view of a portion of the mechanism
shown in Fig. 1 upon an enlarged scale and sec
tioned to more clearly disclose the means for
adjusting the parts of the work pie'ce being
in contact with opposed ñat parallel faces of 10 lapped.
Fig. 3 is a horizontal sec-tional view through the
a lapping member, the lapping member being
work piece adjusting means shown in Fig. 2.
actuated while the work piece is free to adjust
Fig. 4 is another view shown in side elevation
itself relative to the lapping surfaces, and the
of the clamping and adjusting means for the
work piece being actuated relative to the lapping
surfaces while being free to adjust itself rel 15 parts having their gauging surfaces lapped.
Fig. 5 is a detail mechanism forming part of
ative to the lapping member.
the work restraining or positioning means dur
Another object of the invention is to provide
ing its actuation. s.
means for actuating a lapping member having
Fig. 6 is a side elevation in section of the ac
opposed ñat parallel faces, these movements be
tuating and mounting mechanism for the lapping
ing in a direction transverse to its longitudinal
member.
axis while permitting the lapping member to
Fig. 'l is a front elevation of the parts shown
adjust itself angularly about its longitudinal
, axis.
in Fig. 6.
c
Fig, 8 is a detail sectional view taken on the
Another object of importance is to provide
v
meansgfor actuating the work piece relative to the 25 plane of line 8-8 shown in Fig. 6, and
Fig. 9 is a plan view of the work holder taken
lapping member in a direction parallel to the
on the plane of line 9_9 inFig. 1.
longitudinal axis of the lapping member while
In the above-mentioned drawings there has
permitting the work piece to adjust itself to
been shown .but one embodiment of the inven
lapped against the lapping surfaces and to os 30 tion which is now deemed preferable, but it is
to be understood that changes and modifica
cillate about an axis normal to the surfaces being
tions may be made within the scope of the ap
lapped.
pended claims without departing from the spirit
And ñnally it is an object of the invention
of the invention.
to provide means for adjusting the gauging sur
faces of the work piece being lapped relative to 35 Brieñy, andin its broadest aspect, the inven
tion may include the following principal parts:
the lapping member during the lapping oper
First, a base; second, a horizontal spindle pref
ation.
erably adapted to be rotated at any appropriate
With the above and other objects in view
speed; third, an eccentric on the forward end
the invention includes the features of construc
tion and operation set forth in the following 40 of the spindle adapted to engage a horizontally
slidable shoe mounted within a vertically mov
speciiication and illustrated in the accompanying
able slide so that rotation of the’spindle and
drawings.
eccentric will reciprocate the slide vertically a
In the accompanying drawings annexed here
short distance; fourth, a lap holding member
to and forming a part of this specification, I
45 mounted within this vertical slide and preferably
have shown the invention embodied in a machine adjustable laterally with minimum friction; iifth,
for lapping the gauging surfaces of an adjust
a lap mounted in this laterally movable >member
able gauge adapted particularly for gauging the
freely rotatable about its longitudinal axis; sixth,
diameters of plain cylindrical parts, but it will
’ a reciprocatory arm actuated hydraulically or
be understood that the invention can be other
wise embodied and that «the drawings are not 50 otherwise in a direction parallel to the longitudi
nal axis of the lapping member; seventh, a
to be construed as defining or limiting the scope
bracket secured to the outer end of said arm
of the invention, the claims appended to this
and having an opening therein extending hori
specification being relied upon for that purpose.
zontally
in a direction normal to the direction
In the drawings:
.
55 of movement of said arm; eighth, a yoke member
Figure 1 is a front elevation of the principal
bear uniformly throughout its surfaces being
2,409,113
3
4
having a lateral extension engaging within the
the lapping member I1. As the operating mech
opening in the bracket; ninth, resilient means
anism for this piston forms no part of this in
retaining the yoke substantially in a vertical
VentionI further description is not thought neces
plane but permitting limited oscillatory move
sary. At the forward end of this piston is a
ment about the axis of the projection; tenth, a 5 laterally extended bracket 2| secured thereto and
second yoke engaging the ñrst yoke for oscillat
having a transverse horizontal opening extend
ing movement about a substantially vertical axis;
eleventh, work holding members within the sec
end of the piston or ram 20 is secured thereto
ond yoke member; and twelfth, means within the
in iixed position but is free to be angularly ad
ing therethrough.
The bracket 2| at the free
second yoke member for adjusting the parts >of 10 justed with the piston 20 about its axis. A for
the work piece being lapped toward and from
wardly extending bar 22 is provided in the base
the lapping surfaces of the lap.
»extending parallelly to and at one side of the
The embodiment of the invention illustrated
`piston 20 against which a roller 23 on the bracket
is for lapping the work engagingsurfacesl of/an
`2| Ymay_ride. V'This engagement of the roller 23
adjustable snap gauge. These surfaces> after-,the `15 with the rod or~bar 22 keeps the bracket 2| in
gauge has been completely assembled‘are re
position to support yoke members, presently to
quired to be finished to an extremei precision as
Jbe described'in position to engage the work piece
to parallelism and flatness. Heretofore- this- op
W »with the lapping member I'I. When not in
eration has been accomplished by hand with a
use, however, the bracket 2| may be swung to
fixed lapping member-by moving the gauge over 20 an angularly inoperative position for changing
the ‘surfaces `of vthev lap. The present ' machine
-the yokes or to mount other types of work pieces.
~enables this cperatio'n'to'fbe 'accomplished 'me
`The transverse opening in the‘bracket‘ZI .forms
"chaînically, quickly 'an‘dftoV ‘a Thigh ' degree 'of
La bearing fora yoke'24 having upper 'and' lower
parallelism.
"
'
‘
extending arms 25 and‘26, respectivelyyadapted
Referring more in detail to the figures “of the 25 to retain another yoke member :'21 therein, 'The
fdraw`in`gs',l`it ‘will be' seenithat the' drawings dis
`yoke'Z?l has an extension 28 entering’theV open
. close 'a machine for" actuating ’a ’ lap Ahaving `oping in the bracket 0r arm 2| about the axis of
.`posed"flat parallel >surfaces while'perm’ittingad
which the'yoke member‘24 may oscillate. 'As
"'justme‘ntof the lap 'angularly‘ about its- longi
shown inFigs. 1 and 9, arrns'25` and 26 are or
tudinal axis, there also being AWork supporting go'may be integral with the central portion of yoke
'and actuating'means" associated' therewith. ' The
VEil. Arms 29 and 33, Which mayform a' unitary
mechanism for ' operating vthe 'lapping vmember
member, are pivota'lly mounted relative to arms
"Will'ñrst be described.Y
25 and 26' andare resiliently held toward'their
4By "reference'ñrst to Fig. 6 it will be seen
closed position'relative to ar1ns^25 `and 26 ‘by
that’a >horizontal extending . spindle "Ill is rotat 35 a spring 3| pressing fplunger 3| a against 'the
`ablyinountedivithinabase' I I. ,'*Preferably this
spindle I0 >may> be rotated by'a"hydraulic’variable
`speed device either continuously’or"alternately
_in opposite," directions. VAs’tlie‘'n'ieansfor‘‘rotat
ing this spindle form no'partof vthev present 'in-v
vention, further description of this ‘rotating
"means and its ‘control is not‘thought'~to be
necessary. At the forward end of this spindle
central portion of the‘member forming the‘arms
28 and 29.
In 'order to resiliently retain lthe-first yoke
"member 24 in substantially vertical position dur'40 ing‘reciprocatory movements of the bracket 2|
the yoke 24 has Yan arm 32'extending laterally and
horizontally above the axis `of its horizontal ex
tension 28. The end of this arm 32 engages Lbe
I0 is'an eccentric |2‘exten`dìn'g'centrally'within
tween two spring pressed plungers 33 mounted
a bearing shoe- |3""movable 'horizontally ¿within `45 in the bracket 2|. The yoke memberï24, there
`a slide‘ I4 which 'in'turn is “vertically movable on
_suitable Ways provided on ~thei‘ront face'of the
fore, is constrained Yto‘remain in-a substantially
?base. 'Laterally‘movable relative' to the vertical
"pressure kof "light springs engaging plungers 33,
Vvertical position but may oscillate against the
the pressure-of which'may be adjusted lby screws
?slide Ili’is 'a horizontal’ slide` I5 ‘mounted with
`ín` 'the' vertical slide. ‘From the‘above' described 50`34, forcing the "plungers 33 together-against op
posite sides'of the/arm 32.
4mechanism 'it will be 'seenthat tlieïhorizontally
movable' 'slide I5 Will‘be' reciprocated‘ vertically
The second yoke member 21 referred to above
Vwith the >vertically‘movable 'slide` i4 Íbutïwillîbe
and which has its -upper and lower’extension 35
disposed vbetween thearms‘f25 and 26 of the first
free to adjust itself laterally during 'this' vertical
,i'eciprocatory movement.
"
` '
55 yoke -member24-on‘one side'and armS’ZS'and/Sû
’on the opposite Vside is adapted Yto have a Work
‘ Witliînthe" horizontally Vmovable' slide" 'I5' is`a
lap *holding Amember "It ` preferably îm'ounte'd for
'rotation upon'anti-fri'ction bearingsabout ahori
‘zontaliforwardly extending' axis lthat is parallel
to the spindle '|û. Retained'in this holder ’i6
by 'any preferred"meansperm'itting convenient
piece W clamped substantially centrally therein.
--As the clamping -members may be of any `ap
proved form, it is not- thought- that furtherde
60 f scription of them is necessary.
Mountedon this second yoke’ member 21 -are
adjusting and clamping means for the‘adjust
able gauging members<`36 of the work piece AW,
' |'I. In“ the cmbodiment'ofjthe invention shown
the 'drawings' the`lappin'g'm'ember ITis in the
the work engaging surfaces of which are being
form ‘of a"'rectangula1"'rod, 'opposite sides of 65 lapped. The particular embodiment ofthe in
vention described in thedrawings is a snap gauge
which'form'the lapping'surfaces. ‘This'rod I`|
-for plain cylindricalfmembers, there being ka
extends horizontally, 'is free to .adjust itself later
ally and angularly‘about‘its longitudinal’axis,
single anvil 31 alonglone side ofthe frame and
‘two independently adjustable-anvils or gauging
andïis reciprocated by the"ve`rtical"slide' |13 and
eccentric I2 in a vertical plane.
'70 members 3S on the opposite side. The opposed
' The means for actuating the work piece W
lsurfaces of the single» anvil1‘31'and the opposed
relative to and during actuation of the lapping
adjustable anvils 36 have dat parallel faces which
member |`| comprise a piston ’20 shown in'Fig.
4are the surfaces lapped in thislappingmachine
‘1 which `may Ybe vre‘ciprocate‘d "hydraulically or_
and form the gauging or work >engaging surfaces
'Otherwise in'a 'direction'parallel ’to‘the’ axis ~of V75 'of-the» snap gauge -W;
mounting ` and ` demoun’ting' is a' lapping' . member
2,409,113
In order to effect these adjustments of mem- .
bers 36 during the lapping operation screw driver
members 40 are mounted within the second yoke
member 21, two of which engage the slotted ends
of the adjusting screws 4l for the anvils 36 and
the other two engage the ends of the clamping
screws 42 for these anvil members. These screw
driver members 4e are slidably mounted within
portions of the yoke 21 and are normally pressed
toward their anvil engaging positions by light
springs 43. Hand levers 44 are provided for the
screw driver member 4I] engaging the adjusting
and clamping screws 4| and 42 so that these
members V4l) may be quickly withdrawn from en
gagement whenever desired.
To rotate these screw driver members 4D to
unclamp, adjust, and reclamp the anvils 35, gears
while said lap is being reciprocated, means sup
porting the work piece with surfaces being lapped
contacting opposite surfaces of said lap, and
means providing lateral adjustment of said work
piece relative to said lap, whereby said work piece
may adjust itself to the surfaces of said lap dur
ing lapping movements of said work piece and
lap.
. 3. A lapping machine comprising in combina
tion, mechanism for reciprocating a lap having
flat parallel lapping surfaces, means providing
adjustment of said lap in a direction normal
thereto,~means for actuating a work piece having
opposed parallel surfaces over the surfaces of
said lap in a direction parallel to said lap while
said lap is being reciprocated, means supporting
the work piece with surfaces being lapped con
tacting opposite surfaces of said lap, and means
effecting oscillatory movements of said work piece
relative to said lap during the lapping operation,
gaged by other pinions 41 on shafts 48 rotatable 20 whereby said work piece may adjust itself to the
manually by handles extending to the outside of
surfaces of said lap during lapping movements
the yoke member 21. By means of the pínions
of said work piece and lap.
45-45 and 41 and the location of their support
4. An operating mechanism for the lapping
ing shafts the handles 49 are spaced apart for
member of a lapping machine comprising a ro
convenient operation.
tatable spindle having an eccentric at one end,
In operation the lapping member l1 is recip
a slide reciprocated thereby in a vertical plane
rocated in a vertical plane and with the work
normal to the axis of said spindle, a second slide
piece W mounted in yoke 21, as shown, the brack
mounted within said first mentioned slide for free
et 2l is reciprocated horizontally in the di
movement in a plane at right angles to the plane
rection of the axis of the lapping member. This
of movement of said ñrst slide, and a lapping
45 are provided on these members 40 in mesh
with elongated idlers 46 which in turn are en
movement induces a swinging movement of the
yoke 21 and yoke 24 about the axis of the exten
sion 2.8. This swinging movement is due to the
fact that the support and operating connection
member having opposite plane parallel lapping
surfaces mounted in said second slide for free
rotary movement about its longitudinal central
for the yoke 24, that is the extension 28, is a ma 35 axis.
5. Work supporting and actuating means for
terial distance above the axis of the lapping
a lapping machine comprising in combination, a
member. Also the lapping member l1 can free
yoke member having a projection extending lat
ly adjust itself laterally and angularly about its
erally therefrom, actuating means engaging said
axis. In addition the yoke 21 can swing about
projection for reciprocating said yoke member, a
40 second yoke supported for oscillatory movements
the axis of its upper and lower extensions 35.
The result of these movements and adjust
about an axis normal to the reciprocatory` move
ments is to permit the surfaces of anvils 36 and
ments of said ñrst yoke member, and work clamp
31 being lapped to bear evenly upon the surfaces
ing means within said second yoke.
of the lapping member I1. The pressure of these
6. Work supporting and actuating means for
surfaces against the lapping member l1 may be
a lapping machine comprising in combination, a
adjusted during operation by means of the screw
yoke member having a projection extending lat
driver members 40 engaging the adjusting and
erally therefrom, actuating means engaging said
clamping members 4l and 42 for the anvils 36.
projection for reciprocating said yoke member
In this manner and with a lapping compound ap
~ while permitting oscillatory movements thereof,
plied to the member I1 lapping can be continued
a second yoke supported by said first yoke for
until opposite fiat parallel surfaces are obtained
oscillatory movements about an axis normal to
on the anvils 36 and 31.
the oscillatory movements of said first yoke mem
What I claim is:
ber, and work clamping means within said sec
1. A lapping machine comprising in combina
. ond yoke.
tion, mechanism for reciprocating a lap having
'7. Work supporting and actuating means for
flat parallel lapping surfaces, means providing
a lapping machine comprising in combination, a
adjustment of said lap in a direction normal to
yoke member having a projection extending lat
its direction of movement, means for actuating
erally therefrom, actuating means engaging said
a work piece having opposed parallel surfaces
projection for reciprocating said yoke member
over the surfaces of said lap in a direction par GO in a direction normal to said projection, a second
allel to said lap, means supporting the work piece
yoke supported by said first yoke member for os
with the surfaces being lapped contacting oppo
cillatory movements about an axis normal to the
site surfaces of said lap, and means providing
reciprocatory movements of said first yoke mem
lateral adjustment of said work piece relative to
ber, and work clamping means within said sec
said lap, whereby said work piece may adjust it 65 ond yoke.
self to the surfaces of said lap during lapping
8. Work supporting and actuating means for a
movements of said work piece and lap.
lapping machine comprising in combination, a
2. A lapping machine comprising in combina
yoke member having a projection extending lat
tion, mechanism for reciprocating a lap having
erally therefrom, actuating means engaging said
70
flat parallel lapping surfaces, means providing
adjustment of said lap angularly about its axis
projection for reciprocating said yoke member
horizontally while permitting oscillatory move
ments of said yoke member about said projec
tion, a second yoke supported by said first yoke
having opposed parallel surfaces over the sur
member for oscillatory movements about an axis
faces of said lap in a direction parallel to said lap 75
and in a direction normal to its direction of
movement, vmeans for actuating a work piece
.2,409,113
normal to -the oscillatory movements of ïs'a'id -ñrst
yoke member, and work clamping .means 'within
said second yoke.
Y
9. Work adjusting means for a lapping ma
chine comprising in combination, a yoke ïmem
ber, means to reciprocate saidydke member ïwhile
permitting angular adjustments thereof, clamp
ing means within said yoke member for a, work
piece, and means mounted within said yoke
member for advancing a part being lapped to
ward a lapping «member during the .lapping op
eration.
1'0. Work adjusting means for a lapping ma
chine comprising in combination, a yoke mem
bei', means to reciprocate said yoke member While
permitting ‘angular adjustments thereof, clamp
8
ing means within said yoke member for a work
piece, and meansmounted withinsaid yoke >mem
ber for 'adjusting a part of the Work piece being
lapped toward the lapping surface of the lapping
member during Vthe lapping operation.
11. Work adjusting means for a lapping ma
chine comprising in combination, a yoke mem
ber., means to reciprocate said yoke member while
permitting angular adjustments thereof, clamp
ing means within said yoke member for a work
piece, vmeans mounted Within said yoke member
for adjusting a part being lapped toward the
lapping member during the lapping operation,
and means 'to clamp 'and unclamp said part.
ALDEN M. DRAKE.
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