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Патент USA US2121934

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.lune 28, 1938.
l
|_' J. sNADER ET AL
`
2,121,934
« DIAMOND TURNING MACHINE FOR FORMING PISTONS OF ELLIPTICAL SHAPE `
`
Filed Feb. 25, 1935
a shams-shem-l 1
INVENTÓRD
ORNEYS
June" 2_8, 1938.
|-. J. sNA‘DER ET AL '
2,121,934;y
DIAMOND TURNING .MACHINE Non FORMING PIsToNs o?‘ ELLIPT’ICAL SHAPE
Filed Feb.' 2s, v1935
‘
a sheds-sheet 2
--June 28,v 1938.
l'. J.' sNADER Erm.
. 2,121,934
--DIAMOND TURNING MACHINE FOR lFORMING PISTONS OF ELVLIPTNICAL SHAPE'
I
Filed Feb. 23, 1955
8 She'etS-Sheet 3
RNEYS.
-June 28, 1938.
DIAMOND TURNING MACHINE FORNORMING PIsToNs oF 'ELLIPTICALLSHAPE '
'
Filed Feb. 23,1955
_'
s sheets-„sheet 4
, ¿i «A15-E1
4
44
v
.
‘INVENTORS
fm
J." Shader
Chr-:Sivan /lßr‘?//ebaic
,BYî
@14M9
TORNEYS
‘
June 28, 1938.
`
l'. J. sNADER ET Al.
2,121,934
DIAMOND- TURN-ING MACHINE FOR FORMING PISTONS OF ELLIPTICAL SHAPE
Filed Feb. 2s, 1935
8 sheets-sheet 5
/Oö E
/07
INVENTORS.
'Bf/muffa” Mair/@zaak
MMM/f
June 28, 1938.V
~
y „l |._`„'|„ SNADER ET AL'
2,121,93411
DIAMOND TURNINGv MACHINE FOR FORMINGPISTONS OÈ‘ ELLIPTICAL SHAPE
Filed Feb. 23, v1935
-
ß
8 Sheets-Sheet 6`
A _ oRNEYs.
lJune 28, 1938.
l. Jj‘sNADER ET AL
i
2,121,934
DIAMOND TURNING MACHINE AFOR FORMING PISTONS OF' ELLIPTICAL SHAPE'
Filed Feb. 2s'. 1935
"
s sheets-sheet 'rV
ORNEYS.
-Junezs,193s. ,
-LflsNA'DER?AL
2,121334
DIAMOND TÚRNING MACHINE FOR FORMING lPISTQNS OF ELLIPTICALLÈHAPE
ATTORNEYS.
2,121,934
Patented June 28, 1938l
Á,..~ÍUNIT_ED STATES ,PATENT o_FFicI-z» I
y 2,121,934
DIAMoNn
TURNING mcnnm ron. roaM- i
. rNc ris'roNs or mmr'rlcsn sans A
Ira J. Snader and Christian A. Birkebak', Detroit»,>
Mich., assignors to Ex-Cell-O Corporation, a
corporation of Mlollllan
'
-Application February 23, 1935, serai No. 'was
19
(Cl. 82--15)
This invention relates to a~ machine for shaping
three spindles belt driven
or turning internal combustion motor pistons'and
‘thelikep
"
.
.
Fig. 13 is a view in elevation of the skirt-end _
of a piston: showing the elliptical shape thereof. .
Fig. 14 is a view in side elevation of the same,
to provide a machine for turning a piston or like
direction; to provide a machine for tin-ning a
10 piston having an elliptical shape at anycross
section normal to the longitudinal' axis of the
in Fig. 14, the view being taken with the piston
ence' to the position depicted in Fig. 14.
Fig. 16 is an enlarged side elevation of the work
holding iixture shown in Fig. 1. a piston being 15
shown mounted thereon.
tions along the piston, and to provide as machine
15 of this character> which can be readily adjusted
to vary the shape of the piston or'the like being
.
Fig. 17 is an enlarged vertical section taken in '
a plane through the piston 8.318411 Fig. 416.
Fig. 18 isa further >enlarged end elevation of
.
An illustrative embodiment of this invention is
shown in the accompanying drawings.' in which:
20
work piece engaging parts shown in Fig. 17, and a0.l
Fig. 1 is a view in perspective of the improved
machine.
`
. _.
.
rotated _90° about its longitudinal axis with refer.->
piston but with the maior axes of such elliptical
cross-section shifting to diiIerent rotational posi
_.
-
showing the tapering of the same from thel skirt
toward the head.
Fig. 15 is aside elevation of the piston shown 10
workpiece to slightly helical -shape in`an axial
.
by two different mo- f
tioning of .the spindles.
an improved machine for turning pistons
5. Vide
and the like to an elliptical cross-sectional shape;
_
,
tors and illustrating the odset or echelon posi: ' -
The main objects of >this invention are to pro
turned.
`
Fig. 12 isa top plan view of a machine having - '
Fig. 19 is a view _similar to Fig. 1'1 of a modi- _
fled form of work piece holding and aligning
-
Fig. 2 is an` enlarged fragmentary transverse
vertical sectional view of the same taken on the means.
' In theconstruction shown in the drawings, the
line 2--2 of Fig. 1, looking in the direction indi
machine t’in general comprises a base support il 25
25 cated.
` of substantially rectangular shape and having a
Fig. à is a view in elevation of the cutting tool reciprocating work holding table i8 slidably
spindle and bracket therefor as'viewed from the
4 mounted in -ways on the top thereof. A work
- near side of 'the machine illustrated in Fig. 1.
holding fixture or support I1 is mounted on th
Fig.. 4 is a view in elevation of the same as seen table il for carrying _a piston Il or like piece oî 30
`’3o from the right. hand end or Fig. a.
work toward and away from the cutting tool of
Fig. 5 is a longitudinal verticalsectlonal view
` the spindle. The base I5 has an inverted `Uof the same, showing the means for raising the shaped bridge 20 mounted on laterally projecting
rear end of the spindle during the cutting or
and 22 integrally formed thereon
turning operation, taken on the line 5-5 of shoulders 2l
and which supports a horizontally disposed mo 35
Fig. 6 is a view of the same, partly in top plan
and partly in horizontal section, showing the
relation of the spindle to the pistoneor like work
piece being turned. j
4o Fig. ’l isaview in elevation as s_een from the
left hand end of Fig. `6.
_
‘
l
_Y
'
' Fig. 8 is an ‘enlarged view, partly in‘ top' plan
tor driven spindle
_ bly generally designated ,
2l in Fig. 1 of the drawings.
‘ `Referring to Figs. _2 to 7, the spindle >assembly
comprises'a frame 24 secured to the top10! the
bridgeî 2l by vertically disposed boltsy 25. the
heads of which engage in inverted T-slots M_
formed in the top surface of the bridge 2B. A'
. centering diskll is att ched to the underside of _
and partly in horizontal section of the forward .the frame 2l at the mi die thereof by cap screw
end of the spindle and a modiñed form of work
45 holding device with the . work piece positioned>
thereon, showing the relation of th`e axis _of rota- s
. tion of the spindle to the axis‘of the piston being
45
2l and is received in a aperture' 29 formed in
the top surface of the> bridge 20. The frame 24
may be pivotally _swung horizontally about the ï
disk 21 for positioning _' the _frame at .different
angles with respect to the bridge.4
Fig. 9 is a sectional view taken on the line G-S
‘ The front end of the frame .2l is provided with
50 of Fig. 8, looking in the direction indicated. _
'an integrally formed depending lug 30 which is
turned.
_
.
_
_
' Fig. 10 is a top plan view of a two spindle ma
received between the inner ends of axially aligned.
opposed adjusting screws 3l and l2 which _are
threaded through lugs or bosses 33 and Il, re
in
elevation
of
the
left'hand
_
Fig. 11 is a View
vspectively, rigid on the bridge 20. The rear endv
chine in which both spindles'are belt driven by a
single
motor.
‘
'
` '
.nd of the machine shown in Fig. 10. '
2
.
2,121,984
of the frame “24' is also provided with laterally
spaced-depending lugs 35 and 36 which are posi- '
tioned between axially aligned opposed adjusting
screws 31 and 38 which -are threaded - through
lugs or bosses 39 and 40'respectively, which are ,
rigidly attached to the bridge 20. All of the ad
justing Vscrews are provided with jamb nuts 4I
the spindle bodies 18 and 'I9 within the bracket
l45,»the armature 83 being carried on and rigidly
attached to the spindle shaft 8| for driving the
same while the ñeld 82 is rigidly attached to the
bracket 45.
`
The rear end of the spindle shaft 8| projects
from the bracket 45 suiiìciently to receive a brake
for securing the screws in position when adjusted. , _drum 84 which is keyed thereto in the usual man-l
The frame 24 is formed with a relatively flat ner. The forward end of the spindle shaft 0I
10 bottom portion with upstanding sides and at
is provided with an axially disposed‘tapered
the front end thereof the sides curve toward each socket 85 for receiving the shank of a cup-shaped 10
other to form an inverted U'-shaped portion 42 cutting tool carrying cage 86, the rim 81 .of
which imparts rigidity to that end of the frame,
the base of the, frame being cut away atthis
15 point and the sides continued forward in ad
vance of the portion 42 to form a pair of spaced
parallel axially aligned Vbeering heads 43 and 44.
A generally tubular shaped spindle bracket 45
is pivotally mounted at its forward end between
20 the bearing heads 43 and 44 by trunnions 46 and
Which-is drilled in a' radial direction to receive
a cutting tool 88 which is adjusted or positioned
in a radial direction by\a threaded plug 89 which
abuts against the base- end of-the cutting tool.
The cutter 88 is also held lby the inner end of
the screw 90 which is threaded into rim 81 of
the tool holder 86 -in a direction substantially
at right angles tothe axis of the cutting tool 20
88. 'I'he tip or point of the cutting tool 88 is
41 which pass through the bearing headsand
through similar bearing heads 48 and 49 formed so positioned and arranged as to rotate in a plane
on the spindle bracket. 'I'he bracket 45, adja-v which contains the axis ofthe trunnions 46
cent its rear end, is provided with laterally pro
25 jecting kscrew studs 50 and 5| which extend into
vertically disposed slots 52 and 53 respectively
formed in the upstanding sides of the frame 24.
The slots 52 and 53 are formed at the lower end
of vertically disposed bores formed in the thick
30 cned side walls and in which are contained heli
cal compression springs 54 and`55 which bear
between the studs 50 and 5I at their vlower ends`
so that the rear end of the bracket is yie1di'ngly
and 41.
‘
In the modified form illustrated in Figs.‘8 and 25
9, thework-holding fixture comprises a work-'
holding head 9| having clamping plates 92 and
93 bolted to the.front face thereof. An axially
disposed supporting shaft 94 extends from the
' rear of the head .9| which is journaled in spaced 30
axially aligned bearings 95 and 96 formed in the f
supports ,91 >and 98 respectively, and which are
formed-on the top surface of a base plate 99.
urged downwardly at all times.
'
'
The underside of the base plate 99 is supported
35
Means are provided for supporting the rear -- on the table I6, which slides -on the ways |0I 4of
end of the bracket 45 against the action of, the the base I5. 'I‘he shaft 94, at a point between 35
compression springs and comprise a vertically the spaced bearings 95 >and 96, is provided with
disposed post 58 slidably mounted~in a sleeve l a radially extending arm |03, the outer free end4
bracket 59 which is rigidly attached to the bridge of winch is lpivoted to oney end of a link | 04, the
40 20. 'I'he upper end of the upost 58 is axially
other end of which is pivoted to one end of a
bored and threaded to receive an adjusting screw horizontally slidable push bar |05. The push bar. 40
60, the head of which is recessed to receive a ball » |05 is slidably mounted in an upstanding sup
bearing 6I, which provides rolling contact with vporting
bracket |06 -formed on the top surface
the side wall surfaces 62 `f-‘of an inverted V-shaped of the base plate 99. The end thereof opposite
45 groove formed in a bearing block 63 which is'
to the pivoted link |04 is bifurcated to receive.
rigidly attached to the spindle bracket 45. Ro
tative movement of the post 58 is limited by the
inner projecting end of a screw 64 which is re
ceived in an axially disposed slot 65 formed in
50 the post 58, as shown in Fig. 5.
'I'he lower end of the post 58 isbifurcated to
form a pair of spaced parallel arms 66 and 61,
between which is journaled a roller or wheel 68
on a pin 89. The wheel or roller 68 rests upon
55 the top surface oi’ a cam block 10 which is rigidly
a journaled roller |01 which rides against a cam
surface |08 formed at the upper end oi' a bracket
arm | 09, the lower end of which is rigidly secured
'
to the stationary supporting base I5 by bolts ||0.
A helical tension spring ||I has one end at-`50
tached to the -upstanding bracket |06 and the
other end thereof attached lto a depending hook
I I2 formed at the extremity lof the arm I 03 >for
normally maintaining the roller |01 in contact
with the cam surface |08.
.
55
secured to the table I6 by screws 1I, 12 and 13,
y In the operation of this device, the spindle
the latter two of which pass through angle shaped _ bracket supporting frame 24 is pivotally swung
clips 14 and 15 respectively. The vertical arm about the centering disk 21 and accurately po
of each> clip rests on the top of the table I6 a d sitioned by means of the
adjusting screws 3|, 32,
60 the horizontal arm of each overlaps the ex
31 and 38 so'that the plane ,of rotation of the
tended marginal edges 16 and 11 respectively, _ cutting tool 88 will be at a predetermined angle 60
of the cam block 10.
'I'he top surface of the cam
with respect to a plane normal to the axis of the
>plate 10 is sloped as shown at 10A, so as to move ' piston I9 or other work piece whlch'may be
the post 58 upwardly and thereby raise the rear
65 end-of the spindle bracket _to the position shown
in dotted outline (Fig. 5) when the table I6
moves to the left with respect to the stationary
placed on the work holding fixture I1.
The clamping bolts 25 are then tightened so
as to rigidly hold the spindle supporting frame
in such position. A work holding ñxture is then '
bridge 20.
ymoved toward the spindle along the axis line`
’I'he spindle bracket 45 is provided with lspaced
70 axially aligned spindle bodies 18 and 19 rigidly | I3, as shown in Figs. 6 and 8, so that the cut
ting tool, as it engages the end of the piston
retained therein by clamping- bolts 18A and 19A, will, when viewed from a direction normal to 70
respectively. The bodies 18 and 19 vcarry special the axis of the piston, describe an ellipse, there
ball bearing assemblies 80 in which is journaled by cutting away the material shown by dotted
a spindle shaft 8|. ì‘lèe ñeld 82 and armature ,f lines ||4 in Fig. 13, to form the skirt end of
83 of an electric moto ` are positioned between
the piston to elliptical shape.
`
75
9,121,934
As the work holding ñxture continues to ad,
»vance toward the spindle,„the cam surface 10A
will, by engagement" with the roller 68 and
through the post 56, ball 6| and bearing block
63, raiseethe rear end of the spindle bracket,
thereby changing or varying the plane of rota-l
i
--
3,
v
engage and simultaneously begin cutting the'
ends of the pistons, the direction of movement of
the pistonsv -or- other Work being along- the
-lines |30.
`
' As the pistons or other work are moved into Y
engagement with -the‘cutting tools,` the rearends
of the .spindle brackets are cammed upwardly
angles to that secured by angular adjustment y against the action of helical compression springs
’ tion of the cutting tool 8'8 in a direction at right
„ |32 inthe same manner as inthe preferred'form
of the spindle supporting frame 24..
of the device shown'in the preceding figures.
This
movement
of
the
rear
¿end
.of
the
spindle
10
In the embodiment -of the invention shown in
causes the bracket to pivot Aon the trunnionsJ 46
and 41, the axis of which-trunnions intercept Fig. 12, three spindles and spindle bodies |40,
10
the center of the plane of Vrotation of the cutting |4|, |42 are mounted in a single bracket |43
which is pivoted at |44 and |45 to the forwardly
toolA 88. Thus the cutting tool 88 will -also de
scribe a path> of elliptic shape vwhen viewed in I projecting bearings |46 andl |41'of a frame |48. 15
' the‘direction of the axis of the spindle and in 'It will be noted that the planes of the cuttingl
a direction in a horizontal plane parallel to the tools |49, |50 and |5I V_are at a slight angle with
axis of the piston, the ,combination ofthe two' respect to _the axis formed by the pivot mount
|44 and |45, instead» of the axis being in
movements producing a piston or other work ings
piece elliptical in shape when viewed asin Fig. ¿ the plane of rotation of the tools as in the pre 20
' 13, and generally tapered shape, when viewed as ceding forms, the arrangement being such thatV
the axis of the tilting mountings passes through
in Fig. 14, by reason of the removal of the ma
the
centers of the --.paths described by the three '
terialshown ~by the dotted lines ||5 in'Fig. 14
cutting tools. '
and by the dotted lines ||4 in Fig. 13. ,
The spindle shafts jeurnaied '1n-trie bodies im" 25
The shape of the pistonis, however, not that
and |4| protrude from the rear end thereof and
of a true frusto-cone, but is elliptical at -any sec
tion taken normal 'to the axis of the piston. lThe I are provided with belt pulley wheels to receive
majorl axes of such elliptical sections, however, drive belts |52 from the motor |56. The spindle
shaft of the body |42 is similarlyv driven from a
shift in a rotational direction' by an amount pro
single motor |54 through belts |55.v
p
portional
to
the
angle
through
which
the
spin
30
'lle axis is swung- in a vertical plane about the -
Reference may now be had to Figs. 16, 1'? and
18, which illustrate more in detail the construc
pivots 46 and 41. Thus the piston, when lfitted _ tion
of the work holding fixture I1. 'I'he upper
to a true cylindrical bore has an outside bearing
-` land ||6. on ealch- of the two opposite sides‘- >portion of the‘ fixture |1 is provided with an en- '
thereof,~whic_h describe upon the surface of the
. 35
said piston a helix. These lands ||6 are, there- .
-fore, not truly axially disposedbutfdue to the
larged cylindrical boss portion |60 provided with
a horizontally disposed bore |6| hushed at |62
_and in 4which is received a horizontally recipro
way in which they are cut, they -are inclined or cable plunger |63. The inner or left hand end of
helical with respectv to the axis 'of the piston, as `plunger |63 is provided with an enlarged head
indicated in Figs. 14 and ‘15,'the` angle Iof the portion |64 in which is formed a partially spher 4o.
seating surface |65 cooperable with a corre-Á
helix with respect toan’axial direction being ical
spondingly
shaped bearing surface |66 of a swiv
, 'determined' by the angle of the cam surface 10A
elled work engaging element |68. Spaced lugs
which raisesthe rear end- of the spindle.
`In the event this helical angle of the lands is
|61 are provided upon the work >engaging face ,
desired to be decreased, eliminated, or increased,
of the swivelled element |68. A plurality of pins
tact inl the cylinder in which4 the piston is dis
posed and eliminates localized wear on the cyl-_
ment |68 withreference to the plunger |63'and
head portion |64 thereof. The swivelled element
axially disposed. The effective support ofthe
which projects, in spaced relation‘from the walls
|2| are ganged together on a common baseÍ and
driven by a single motor |22 which' is rigidly
-bolted to the outer. side of the frame or spindle
of the plunger |63. This urges the spherical sur-Í-
use is made,> o°f the modiñed form of fixture |10 are ilxedto the swivelled element |68 and ex
holding head shown in Figs. 8 and 9, the cam tend to the right therefrom, as indicated in Fig.
surface |08 of which can be arranged to either `_ 17, into suitable borings |1| provided in the en
-decrease, increase or entirely eliminate the helix larged head portion |64 to limit rotation of the
angle of the bearing lands. The ycomparatively r swivelled element |68 relative to the plunger |68
and also to limit swivelling movement of the ele~
narrow helical land provides a wide bearing con
inderwalls which would occur »if the land were ` |68 is provided with a step bore |13 through .
piston in the cylinder is 'thereby circumferen \ thereof, a stud holt |14. A? spring |15 is arranged
in compressed condition between the head of the
tially increased, while the advantages of a nar
row bearing which allows room for expansion` of stud bolt |14 and a radially inwardly directed
ñange |16 provided on the swivelled element |66
the piston is retained.
. _
`
`
y
In the form of, the invention shown in Figs. 'so as yieldably to urge the swivelled element |60
10 and 11, two belt driven spindle units |20 and into contact with the enlarged head portion |64
unit |2I», a double belt pulley |23 being provided
on the armature shaft of the motor for driv
ing two belts |24 Íand |25 which passI around
pulley wheels |26 and |21 respectively, which
, are keyed to the protruding ends of--th'e
ro
‘shafts m and |29 respectively. ' »
The spindle units |
lation to each othe
-
i, '
spindle
’
and |2| are in offset re
n amountV equal- to the
face bearing surfaces |65 and |66 into close lcon
tact at all times- to prevent admission of >dirt or
other foreign. matter between the swivelled ele
ment and the head portion |64. The plunger
|63, its enlarged head portion“|64 andthe swiv
elled element |68fprovide a movable clamping
element for retaining the piston I9 secured'to
the fixture |1.
'
'
'
The head portion mis provided 'with e recess'
on adapter |80 opening to the left from the head e
angle at.which the spi dle units arev set with ‘ portion and shaped so as to receive the peripheral
respect to the axis of t ¿piston being turned, lsurface- of the work piece at the right hand end
- , so that the cutters> of theïtwo- spindle units will thereof so as to'align the work piece I9 with its t,
l
l'
i4
axis in a predetermined position with reference
to the fixture I1. A stationary vclamping ele
ment I8I provided with a radially inwardly di
rected .ñange |82 is secured to the ñxture I1.
'I'he flange |82 is of U-shaped form.` as indicated
in Fig. 18, and is adapted to be received within
a ring groove |83 of piston I9 or in a similar
10
by the aligning pins |18 of Fig. 18. Springs
269 are arranged in compressed relation between
the head 218 andvñangeÀ 216 provided on the
swivelled element 268 for resiliently urging the
Jswivelled element into engagement with the 5
enlarged head portion 264 to prevent admission
of dirt or foreign matter between such enlarged
peripheral groove within the work piece to be head portion and the swivelled element 269.
turned.
.'Spaced work engaging lugs 261 are provided on `
'I'he plunger |63 may be actuated toward and the swivelled element 268, as before.
10
away from the stationary clamping :dange |82 by
The adapter for `aligning the longitudinal axis
means of the manually operated crank |84, illus
trated in Fig. 1. The operating connection be
tween the manual actuated crank |84 and the
plunger |63 may be in the form of a screw, hy
draulic means, or any other desired type of actu
ating means commonly employed in the art.
The speciñc actuating means is not illustrated
in the present instance, since the particular type
of actuating means used forms no part of _the
present invention.
In mounting a piston I9, or' similar work piece,
upon the fixture I1, the work piece is slid down
wardly with the flange |82 of the stationary
25 clamp I8I disposed within the peripheral ring
of the work piece or piston I9 in this embodiment
take‘s the form of a reciprocable center 288
mounted within a bore 299 provided at the inner
or left hand end of the plunger 263. A spring 15
29| is arranged ln compressed condition between
the bottom of the bore 298 and the outer or right
hand end of the reciprocable center 288 for forc
ing the latter outwardly to project a point 292
within a suitable axially arranged opening 294 20
within the workpiece or piston I9. An axially
arranged groove 295 is provided in the periphery
ofthe reciprocable center 288 and a stud screw
296 'cooperates therewith for preventing
of the center 288 from the plunger 263.
25
groove |83 ofthe piston I9 or similar work piece ' ' The operation of this work holding means is es
and the swiveled clamping element |68 brought sentially the same as that described with refer
into engagement'with the adjacent end face oi ence to Figs. 16 to 18, inclusive, with the ex
30
the work piece. The spaced work engaging lugs ception of the fact that thespring urged center
|61 upon the swiveled clamping element |68 upon 288 is employed for maintaining the longitudinal
movement of the plunger |63 in-‘the directionV axis of the work piece I9 in the predetermined po 30
indicated by the arrow |85 of Fig. 17 bring the sition vwith reference to the iixture I1 instead of
head end wall ofthe groove |83 into firm engage
an adapter such as |88 employed in the embodi~
ment with the fiange |82 to secure the desired ment shown in Figs. 17 and 18'to engage the pe
alignment of the piston I9 with reference, to the ` ripheral margin of the head end of the work piece.
35
fixture I1. The recessed adapter |88 upon -the
-Although several diiïerent embodiments of this
-enlarged head end portion |64 of plunger |63 of
the movable clamping element maintains the f_invention have been herein shown and described,
_longitudinal axis of the piston I9, or similar work it will be understood that numerous details of
piece, in a desired predetermined position with the constructions shown may be altered or.
without departing from the spirit of this 40
reference to the fixture I1. ‘I'he element |68 is omitted
invention as deñned by the following claims.
free to swivel relative to the enlarged head por
We claim:
tion |64 a suiïlcient amount so that the surface
of the work contacting the lugs |61 does not have
to be accurately machined or aligned with refer
ence to the groove face |83. The piston I9, or
similar work piece is heldvclamped to the iixture
I1 in the position indicated in Figs. 16 and 17,
while the work piece is turned to the desired
1. In a machine for shaping or turning an ap
prdximately cylindrical-piece of work, a support, a
work holding device -on said support, a device -on 45
said support having a cutting tool journaled to
rotate in a plane about an axis so as to circum
scribè a generally circular area, means‘for mov
ing one of said devices toward the other for en
'shape and then may be removed from the fixture ' gaging the work and cutting tool, said cutting
tool's axis of rotation being at an angle to the 50
direction oi.' relative movement of said devices and
The'work piece may then be lifted in a vertical , intersecting with the longitudinal axis of the work
direction out of the clamping means secured to piece in such plane.
`
by retracting the plunger I 63 in a direction oppo
site to that indicated by the arrow |85 in Fig. 1’1.
the fixture I1.
.
'
’
2. In a machine for shaping or turning an ap
Reference may now be had to Fig. 19 in which proximately cylindrical piece of work, a support,
a slightly modiiied form of movable clamping a work holding device on said support, a spindle
member _and adapter is employed. In this em
device on said support, a cutting tool rotated
bodiment a iixed clamping member 2I8I is secured by said spindle in‘ an orbit about the axis of the
60 to the fixture I1 and provided‘with" a substan
spindle so as“ to circumscribe a generally circu
tially -U-shaped iiange |82 adapted to engage a lar area, means for moving one of said'devices
ring groove or similar peripheral groovev |83 of _ toward the other for engaging the work and cut
the work piece. A reciprocable plunger 263 is ting tool, the plane of orbital movement of said
mounted within a bushing |62 pressed within the cutting tool being at an angle ~to a plane normal
65 bore I6I of the upper enlarged portion' |68 of
to the direction of r ative movement of said
the ñxture I1. An enlarged head> portion 264 is devices and the cente of ~said area coinciding
provided on the plunger 263 in much _the same with the longitudinal ' of the work piece.v
manner as in the embodiment previously de
3. In. a machine forshaping4 or turning a piece
scribed and a swivelled element 268 and the head of work, a support, a work holding device on said
70 portion 264 are provided with partially spherical support. a device on said support having a cutting
bearing portions as before. Swivelling movement ,tool journaled to'rotate in a plane about an axis,
of the element 268 with reference to the enlarged means for moving one of said'devices toward >the
head portion 264 is limited by a plurality of stud other for engaging the work and cutting tool, said
screws 218, three iii number being preferably em
cutting tool's axis of rotation being at an angle
75 ployed, and arranged in the ‘relation indicated to the direction of relative movement of said de
55
60
‘
70
~
5
l 2,121,934'E
vices and means forv changing the plane of rota- » 9. vIn a machine for shaping-or turning a piece
tion or said cutting tool during the period of of work, a support, a work holding device on said
engagement with the work. ,
'
.
support, a spindle device pivoted to said support,
y _
a cutter rotated by saidgspindle in a plane con
taining the axis of said spindle pivot, means for
moving one of said devices relative to the other
4. In a machine for shaping or turning a piece
_of work, a support, a. work holding device on said
support, a device on said support having__a .cut
for engaging the work'and cutter and means for
movingy said spindle device on its pivot during
ting tool journaled to rotate in a plane about an
axis, means for moving one of said devices toward'
the other for engaging the work and cutting tool,
cutting tool’s axis of rotation being at an
io “said
angle to the- direction of relative movement oi
said devices, and means i019 progressively chang
such relative movement.
-
10. In a machine qfor shaping or turning a piece 10
of work, a support, a work holding device on said
support, a- spindle device pivoted to said support,
l a cutter rotated by said spindle in a plane con
ing the plane of rotation oi said - cutting tool dur
taining lthe axis of _said spindle pivot, means
ing the period of engagement with the work.
5. In a machine for shaping or turningv a piece -for movingone of said devices relative tothe 15
other for engaging the work and cutter, the
support, a device on said support having a cutting plane of rotation of said cutter beingv ät an angle
tool journaled to rotate in a plane about an axis, to a plane normal to the direction of'such move
means for moving one of 'said devices toward the ment, and means for moving said spindle device 20
other for -`engaging the work and cutting tool, on its pivot during such relative movement. =
11. In a machine for shaping or turning a
said cutting tool’s axis of rotation being at an
angle to the direction -of relative movement of - piece of work, a support, awork holding device, ,
said devices, and means for moving the axis of on said support, a spindle device -pivoted to said
,rotation of said cutting tool at an angle to the support, a. cutter rotated by said spindle in -a
direction oi relative movement of -said devices plane Icontaining the axis of said spindle pivot 25
during such relative movement but in a direction -and perpendicular to the axis of rotation of said
' diiïerent from they ñrst mentioned angularv di-- spindle, means for moving' one of said devices
relative tothe other for engaging the work and
vergence.
6. In a machine for shaping or turning a piece cutter, the axis of saidt‘spindle being positioned
30 o! work, a support, a work- holding devicel on at an angie to the directiono! ‘relative‘movement
Y said support, a device on said support having a of said devices and in a plane containing the axis
cutting tool journaled to rotate in a plane about lof said spindle pivot, and means for moving said
- an axis, means for moving one of said devices spindleV on its pivot. during such relative move
, of work, a support, a work holding device on said
toward the other for engaging the work and cut
ting tool, said cutting tool’s axis of rotation be
ing-at an angle to the direction of relative move
ment.
ment of said devices, and means for moving
the, axis of rotation of said'cutting toolat an
angle to the~direction of ,relative movement of
spindle and containing the axis of said spindle
40 said'devices during such relative movement but
pivot,-means for moving one of said devices rela
in a direction substantially at right anglesto the
` ,
first mentioned angular> divergence.
'
.
12. In a machine for> shaping `or turning a`
piece of work, a support,.a work holding device
on said support, a spindle device pivoted to Ísaid
support, a cutter rotated by said spindle in a
plane perpendicular to the axis of rotation of said
- tive to the other for engaging the work and cutter
'
'7. In a machine for shaping or turning va piece i -and means for moving said spindle on its pivot
'
of work, a support, a work holding device on' said during such relative movement.-. 13.. In a machine for shaping or turning“a45 support, a device on said support having a cutting »
' tool journaied to rotate in a plane about an axis, piece of work, a, support, aÍ work holding device
means ior-"movingroneof said devicesitowardfthe . on said support,l a spindle device gpivoted to said
other for engaging the work and cutting tool, said
cutting tool’s axis oi' rotation being at an angle
tothe direction ì of 4relative movement of- said
devices, and means for moving the axis'oi rota
tion of said cutting tool at an angle to the -direc
support, the axis of-said pivot being'perpendicu-larto the axisof rotation of said spindle, a cutter
rotated by said spindle in a- planeperpendicular
to the'axis of rotation of said spindle and -con
taining the axis of said spindle pivot,-- means tor
ltion of, relative movement oi’ said devices~ during moving one of saiddevices relative to the other v
such relative -movement butin a direction kdit-v for engaging the work and cutter and means vfor
moving said spindle on its pivot ‘during such rela--- ~
vferent `from the first mentioned angular diver
gence, _and means for imparting limited rotation l tive movement.`
to the work being shaped during >the shaping op
14. In a machine forshaping or turning a `
piece otlwork, a support, a ,work holding device
¿, 8. In a machine for shaping or turning a piece fon said support, a spindle device pivoted to said*v 1
o! work, a support, a work holding device on said support. a cutting tool rotated by said spindle in'`
eration. ‘
y
support, a device on said support having a cutting`
a plane normal to the axis of rotation of .saidl
tool journaled to rotate in a -plane about an axis,
spindle, means forv moving one-oi said devices
, means for moving one oi said .devices'toward‘the relative tothe other for engaging the work and - ‘
other for vengaging the work and cutting tool, - cutting tool, lthe axis of’rotation of said spindle
said cutting tool’s axis oi' rotation being atan
` angle to the direction o! relative movement of
said devices, means for movingfthe axis of rota
tion of said cuttingl tool at an angle to the di
rection of relative movement of said deviceadur
ing such» relative movement but in a `directiî'rn
» diii'erent from the ßrst mentioned angular diver
f gence, and means for imparting, limited rotation I
to the4 work being’ shaped on an axis parallel to
the direction of relative movement o! said device,
" ‘ . during such relative movement.
being at an angle >to the direction of relative
movement or said devices and in a direction‘par
allel to a plane'containing the axis of rotation o!
said spindle and theaxis of said pivot
15. In a. machine for shaping orNturning a
piece of work, a support,'¿'a work holding device
on said support, a spindle device pivoted to vsaid.support, a cutting tool rotatedby said‘splndle in a plane normal to /the axis of rotation oi said
spindle„means ~for moving one of said devices Y
relative to the other for engaging the work and
6
2,121,984
cutting tool, the axis of rotation of said spindle
being at an angle to the direction of relative
-movement ofA said devices and in a direction par
allel to a plane containing the axis of rotation
5 of said spindle and the axis of said pivot mount
ing and means for moving said spindle device on
its -pivot during such relative movement.
movement directed at an acute angle to the plane
of tool rotation.
I
`
18. A machine for shaping a work piece ini
tially of generally cylindrical shape to provide an
elliptical surface, which comprises- means for
holding the work piece substantially against ro
tation, a single-point tool adapted to engage the
work piece. means for rotating the tool, and
means for relatively advancing the work piece
104 work holding ilxture- mounted on said movable and tool to cause the tool to engage the work piece 10
support for supporting a generally cylindrical `progressively along the latter with the longitudi
‘work piece with the longitudinal axis ci.' said work nal axis of the work piece progressively during
piece disposed parallel to the direction of move- . such movement coinciding with the center of the
ment of said movable support, a single-point tool. area defined by rotation ofthe tool point, but
15 a tool spindle mounted on said stationary sup
with such axis directedat an acute angle to ther
port for rotating said single-point tool about the plane of tool rotation.
_
»
axis of said spindle, means for rotating said spin
19. A machine for shaping a work piece ini
dle, the longitudinal axis of said work piece and tially'of generally cylindrical shape to provide an
the axis of said spindle beingdisposed at an angle elliptical surface; which comprises means for
20 .and intersecting at the center o! the path of tool . holding the work piece substantially against rota
20
rotation, and means for causing relative move
tion, a single~point tool adapted to engage the
ment of said movable- support with respect to- the work piece,v means for rotating the tool, and
tool whereby said tool will generate an elliptical means for advancing the Work piece with respect
16. In a machine tool, a base having a sta
tionary support and a movable support thereon, a
surface of said work piece.
25
Y
17. A machine for providing a work piece wit
an elliptical surface which comprises means for
touthe tool to cause the latter to engage the work
progressively therealong, with the axis of the 25
work piece during such movement remaining un
holding the'work piece substantially against rota
changed in direction, -coincident to the center of
tion, a single-point tool 4adapted to engage the' the area deñned by the tool point rotation, and
work piece, means for rotating the tool, and directed to an angle to the plane of tool rotation.
30 means for advancing the `,tool and 4work piece
IRA J. SNADER.
j
30
relative to each other with the path of relative
CHRISTIAN A.~B1RKEBAK.
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