close

Вход

Забыли?

вход по аккаунту

?

Патент USA US2412653

код для вставки
Dec. 17, 1946. A
w_ E Ross
2,412,653
)FORM TOOL GENERATING ‘FIXTURE
Filed Nov. 4, 1944
5 Sheets-Sheet l
Dec. 17, 1946.
2,412,653
w. F. ROSS
FORM TOOL GENERATING FIXTURE
Filed Nov. 4, 1944
v5 Sheets-Sheet 2
23
31; 1,39%:
116747? 3
m
7
INVENTOR.
Dec. 17, 1946.
w_ E Ross '
2,412,653
FORM-TOOL GENERATING FIXTURE
Filed Nov. 4, 1944 ,
4'0 38/ 51/139
AH
16
5 Sheets-Sheet 3
'
13/ '
15'.
IN VEN TOR.
2,412,653
Patented Dec. 17, 1946
UNITED STATES PATENT ,OFFICE
2,412,653
FORM TGOL GENERATING FIXTURE
Walter F. Ross, Oakland County, Mich, assignor
to Motor Tool Manufacturing Company, De
troit, Mich, a corporation of Michigan I
Application November 4, 1944, Serial No. 561,988
12 Claims. (01. 51-100)
1
.
This invention relates to circular form tool '
2
of parts hereinafter describedbyway of exam
grinding ?xtures and has for its object to pro
ple, having reference to the accompanying draw
vide an arrangement in which the grinding of '
ings, wherein:
such form tools of complicated outline, and more
Figure 1 is a side elevation, shown partly in
especially of outline having abrupt variations in 5 , section, of a grinding machine embodying the said
form, may be effected by the operator to conform
invention;
with conditions imposed by the form of a master
Figure 2 is a plan view of the same; and
dummy with great facility and accuracy.
Figure 3 is a similar view to Figure 2 illustrat
An important object of the said invention is
ing a different operational position of the parts.
to provide such a device in which a follower '10
Similar characters of reference indicate similar 1
?nger traverses the dummy and thereby limits
parts in the several ?guresvof the drawings.‘ 7
the variable relationship of the work to the i 6 indicates the fixed base structure of a grind
abrasive wheel, to secure the ground reproduc
ing machine supporting .a work table I! which.
tion of the contour of the dummy on the work,v
is subject to controlled longitudinal feed by mech-/
and in which this relationship may be accurately 15 anism (not shown) such as is common to such
and readily preserved throughout changes which
machines.
may be made in the angularity of presentation
Mounted on the said table l I is a transversely
of the abrasive wheel to the work such as may
slidable table 13 which I show as being biased
be necessary to the operator in the grinding of
for such transverse movement by weighted lever
shoulders. steps, sharply bevelled outlines, and 20 ill linked to the back of the said table l3 and
so forth.
‘
it is a hand feed screw by means of which trans
More particularly it is an object of the said
verse adjustment of the said table may be e?ectcd.
invention to provide for the coupled angular
The table is is shown as being provided with an
manual adjustment of the abrasive wheel and
abutment it on its under side which may im
the follower ?nger whereby their points of con 25 pinge against a stop I? on the end of the said‘
tact with the work and with a master dummy,
feed screw it‘: whereby the operation of the said
respectively, will be maintained in the same rela
i‘eed screw may be effective in controlling ad-‘
tion to the respective centers of angular adjust-v
justment of the said table but, at the same time,v
ment of the said follower ?nger and the abrasive
30 permitting the said. table to be freely‘ moved
wheel support.
without interference of the saidfeed screw in a
‘A’further object is to'provide for the adjust.
direction to positions forward of the said- stop.
ment of the abrasivewheel upon its reduction in
The said work table i3 ‘is hollow or has suitable
diameter, as by dressing, to bring the arc of
spacing provided on‘ its under side to accom
swinging of- that portion of the periphery of
modate linkage ‘mechanism, as will be explained,v
the wheel presented to the work into radial
and also has a suitable opening in the top there
conformity with the arc of swinging of the fol
of to provide clearance for the movement of a
lower ?nger.
.
finger post I2 operated by the said linkage mech
A still further object of the said invention is
to provide for control of a work-carrying table
Mounted on either end portions of the said
in such manner that the work may be either 40
transversely slidable table I3 are tail stocks l8
manually fed toward the abrasive wheel, subject and i9, hereinafter referred ‘to as the'left hand
to limitations imposed by the master dummy, or
and right hand tail stocks, respectively, the ‘left
allowed to automatically move with respect to
hand. tail stock carrying two centers 20 and 2|
the abrasive wheel under such in?uence and
under the further influence of a Weight or sim 45 in parallel horizontally spaced relation to each
other, and ‘the right hand tail stock 19 similarly
ilar means biasingthe work table in the direc.
anism.
tion of the abrasive wheel.
1 -
Still further objects or advantages additional
or subsidiary to the aforesaid objects, or result
-‘
"
‘
'
carrying‘ two centers 22 and £23 in’axial align
ment with the said centers Zlland 2|. The tail
stocks is and iii are adjustable toward and from
ing from the construction or operation of the '
one another on the said table I 3 to accommodate
invention as it may be carried into effect, will
work or arbors of varying lengths. In the present
become apparent as the said invention is herein
example an arbor 24 is shown as carried between
the centers 28 and 22 and an arbor 25'between
after further disclosed.
In carrying the invention into effect. 1 mayv
adopt the. novel. construction and arrangement.
the centers 2,! and 23, the arbor 24 having a pulley
25 mounted thereon which is coupled. by the belt‘
2,412,658
3
27 with the pulley 28 of a motor 29 carried on
the tail stock l9.
The arbor 35 has mounted thereon a dummy
36 having the pro?le of the Work to be ground,
which pro?le in this instance is characterized by a
central portion 31 of conventionally cylindrical
form, terminating at one end in a 90° shoulder
38 and at the other end in a bevelled shoulder
39, the enlarged end portions of the dummy 36
having concaved cylindrical surfaces 40 and 4|.
These various forms of pro?le are to be ground
on work, such as a rotary form cutter 42, mount
ed on the arbor 24 and present a grinding prob
4
shoulder 39 offer itself to being properly repro
duced by such a wheel. Moreover, neither of
these shoulders, and especially the ?rst, lend
themselves to a continuous generating motion of
the dummy over the ?nger 43 as will be obvious,
and, in cases such as these, I propose by hand
adjustment of the feed screw [5 to bring the feed
screw stop 11 into controlling contact with the
abutment l6 of the table I l whereby required
movement of the dummy 36 in relation to the
follower ?nger 43 may be effected manually by
operation of the said feed screw I5.
It is also desirable, in eifecting the grinding
of such shoulders as 38 and 39, that a follower
lem which the present invention and the mech
anism described herein solves in a simple and 15 ?nger such as 45 of suitably modi?ed form be
substituted for the ?nger 43 and be presented
highly ef?cient manner. For the sake of clear
at an angle to the shoulder to conform with
illustration and simplicity the solid outline of
the angle at which a correspondingly substituted
the work is shown without illustrating the pres
abrasive wheel 46 is presented to the work, as
ence of teeth or grooves which are character
istic of a rotary cutter and which may be of 20 shown in Figure 3. To enable this to be done
without disturbing the working relationship as
various forms.
to position of motion between the dummy and
43 is a follower ?nger carried by the upper
its follower ?nger, and between the work and
end of the ?nger post l2 to engage the surface
the grinding wheel, I provide means for coupling
of the said dummy 36 for the purpose of causing
the transversely slidable table I 3 to move laterally 25 the grinding Wheel and the follower ?nger to
gether for co-related angular adjustment so
under the in?uence of the weighted lever M in
that the point of the follower ?nger during such
conformity with the outline of the said dummy
adjustment will traverse the same are and de
over which the said follower ?nger 43 passes
gree as does the active grinding point of the
as the table H is fed longitudinally. It is not
intended that the dummy '36 rotate during such 30 abrasive wheel.
To accomplish this in a simple manner, I
operation although it may be rotated from time
may mount the spindle 41 of the abrasive wheel
to time as by hand between operations to pro
on a tum-table 48 mounted on a suitable pedestal
vide a new wearing surface for contact with
49. This pedestal is shown as being provided
the ?nger 43, if thought necessary or desirable.
The work, however. is rotated through the agency 35 with a stationary clamp bracket 50 extending
forwardly beneath the table I l to support a
of the motor 29 during such movements of the
pivot 5! on which a ?nger swivel bracket 52
table in order that a suitable grinding wheel,
is mounted. This bracket carries the ?nger
such as 44, may effect the circular grinding of
post l2, previously referred to, and also has
the work in conformity with the pro?le deter
connected thereto, in spaced relation to and on
mined by the cooperative action of the follower
opposite sides of the said pivot 5|, links 53 and
?nger 43 and the dummy 36.
54, the rear ends of which links are connected
It will be observed that, in the example, the
at 5-5 and 56 to the under side of the said turn
stop I‘! of the feed screw 15 is capable of being
table 48.
moved to a spaced position from the abutment
As a result of this linkage any angular ad
16 of the table all so that the said table may
justment of the grinding wheel, by rotation of
be free to move laterally under the in?uence of
the turn-table 48, will be accompanied by cor
the weighted lever l4 to an extent limited by
responding angular adjustment of the ?nger
the contact of the dummy 36 with the follower
swivel bracket '52 as will be clearly observed by
?nger 43. Thus, with the table so freely mov
able, such outlines as the concaved cylindrical 50 a comparison of Figures 2 and 3.‘ When such
an adjustment is made, as for the purpose of
surfaces 40 and 4! of the dummy may be ground
grinding the form of the shoulder 38 on the
in reproduction on the work 42 by the abrasive
wheel 44 by simply permitting the said table II
to adjust itself laterally under the in?uence of
work, the table II is moved longitudinally and
laterally to bring the said shoulder 38 into con
tact with the follower ?nger 45 which will bring
the work into correct position with respect to
40 and 4| of the said dummy of the point of
the abrasive wheel for the grinding of such a
the follower ?nger 43, when required longitudinal
shoulder on the said work; and the required
movement is imparted to the said table by the
motions of the work relative to the abrasive
regularly provided longitudinal feed mechanism
60 wheel, for effecting such operation, may then
common to grinding machines.
be readily and accurately instituted by the
It will be readily understood that this gener
manual longitudinal and lateral adjusting of the
ation of the said pro?led form on the work is
said table II by feed means provided and to
due to the fact that the motions of the dummy
the extent required.
travelling over the follower ?nger are imparted,
As far as the grinding ,of the form of the
through the corresponding motions of the table
shoulder 39 on the work is concerned, the follow
II, to the work 42 carried in parallel with the
ing of the contour may be effected by hand con
said dummy by the said table l I.
trol
of the table where the angle of the shoulder
In many form tools of - complicated outline it
is so steep as to render this necessary or desir
is frequently impossible to have the follower
?nger de?ne such outline in a continuous man 70 able; but where the angle is such that it does
not preclude it, the feed screw stop I 1 may be
ner Or with an abrasive wheel dressed to only
released from the feed table abutment IE to
one peripheral form. For instance, in the ex
permit the follower ?nger to freely ride the an
ampleshown, the 90° shoulder 38 could not be
gular surface and thereby directly and. solely‘
ground with the radially dressed wheel 44 as
shown in Figure 2, neither does the bevelled 75 control the lateral movement of the said table
the progression over the said pro?led surfaces '
2,412,053
5
H during its longitudinal movement relative to
table, a‘work-grinding. abrasive wheel mounted
the said follower ?nger.
on said turn-table for angular adjustment to the '.
work, a pro?led stop carried by said table having
5'! indicates a suitable type of wheel dresser
which‘may be interchangeable from one type to
another according tothe form to be dressed on
the abrasive wheel and 58 is a micrometer screw
for moving the dresser into the wheel as required.
In order to maintain the working point on the
wheel at a determined distance from the center of
rotation of the turn-table 48 so that its arc of
swinging adjustment will conform with that of
the ?nger, the abrasive wheel after dressing
should be moved up to the work to an extent
equal to the amount dressed of the periphery of
the wheel. For such ‘purpose it may be con
sidered that the support 59 on which the abrasive
wheel assembly is mounted is slidable to some
extent as in dove tail ways so formed on the
table 48 under'the influence of the micrometer
adjusting screw 6|.
the form of the envelope of the work 'as it is to be
ground, a follower ?nger presented‘ to a longi
tudinal line on the‘ pro?led surface of said stop,
a ?nger swivel bracket coupled to said turn
table whereby angular adjustment of both said
wheel and said ‘follower ?nger may be cc
ordinated, adjustable means for synchronizing
the radial swinging arc of the working contact
point of said wheel with the radial ‘swinging arc
of thecontact point of said ?nger, and means for
adjustably moving said wheel toward the work
perpendicular to the axis of the wheel, while
maintaining the relationship of the axis of
angular setting of the wheel to the angular set
ting axis of the follower.
4. In a circular form tool grinding device of
the ‘class described, a work-guiding table, a Work
grinding abrasive wheel, a pro?led stop carried
Thus if the dresser adjusting screw 58 be ad
by said table having the form of the envelope of
vanced, say, .005” in dressing the abrasive wheel
the work as it is to be ground, a normally sta
the wheel adjusting screw SI is thereafter ac
tionary- follower ?nger presented to a longitudi
cordingly advanced .005" to compensate for the
reduction of the grinding wheel radius, as will 2.vi nal line on the pro?led surface of said stop, means
for adjusting the angularity of presentation of
be well understood. As there is a limit to the
the said wheel and the said follower to the work
extent to which it may be practical to move up
and to said pro?led stop, respectively, for the
the abrasive wheel in the manner described, it
purposes speci?ed, releasable manual means for
maybe necessary to discard the grinding wheel
when its radius has been reduced to such limita SO feeding said work-table toward said wheel, and
means biasing said table in the direction of said
tion and a new wheel substituted therefor after
wheel when said manual feed is released.
retraction of the‘ wheel support 59 to its original
5. Ina circular form tool grinding device of
centralized, position on the turn-table 43.
the class described, a work-guiding table, a work
With an arrangement such as that described
rapid and accurate reproduction of complicated
forms on a form tool cutter from a master dummy
grinding abrasive Wheel, a pro?led stop carried
by said table having the form of the envelope‘
of the work as it is to ground, a normally sta
may be effected with great facility.
tionary follower ?nger presented to a longitudi-r
This invention may be developed Within the
nal line on‘ the pro?led surface of said stop,
scope of the following claims without departing
from the essential features of the said invention, 40 means coupling said wheel to said follower for
and it is desired that the speci?cation and draw
coordinated angular adjustment relative to the
ing be read as being merely illustrative’ of a
work and to said pro?led stop, respectively for
practical'embodiment of the said invention and
the purposes speci?ed, releasable,‘ manual
not in a strictly limiting sense.
'
means for feeding said work-table toward said
wheel, and means biasing said table in the direc
What I claim is:
1. In a circular form tool grinding device of the
class described, a work-guiding table, a work
grinding abrasive wheel, a pro?led stop carried
by said table havin the form of the envelope of
the work as it is to be ground, a follower ?nger ,
presented to a longitudinal line on the pro?led
surface of said stop, means for adjusting the
angularity of presentation of the said wheel and
the said follower to the work and to a dummy
respectively, and means for adjustably moving ,
said wheel toward the work perpendicular to the
axis of the Wheel, while maintaining the rela
tion of said wheel when said manual feed is re
leased.
‘
'
' 6. In a circular form tool grinding device of
the class described, a work-guiding table, a turn
table, a work grinding abrasive wheel mounted
on said turn-table for angular adjustment to
the work, a pro?led stop carried by said table
having the form of the envelope of the work as
it is to be ground, a normally stationary follower
?nger presented to a longitudinal line on the
pro?led surface of said stop, a ?nger swivel
bracket coupled to said turn-table whereby angu
lar adjustment of both said wheel and said fol
lower ?nger may be coordinated, for the pur
tionship of the axis of angular setting of the
wheel to the angular setting axis of the follower.
2. In a circular form tool grinding device of GU poses speci?ed, releasable manual means for feed
ing said work-table toward said wheel, and means
the class described, a work-guiding table, a work-v
biasing said table in the direction of'said wheel
grinding abrasive wheel, a pro?led stop carried
when said manual feed is released.
' by said table having the form of the envelope
7. In a circular form tool grinding device of
of the work as it is to be ground, a follower ?nger
the class described, a work-guiding table, a Work
presented to a longitudinal line on the pro?led
gi-inding abrasive wheel, a pro?led stop carried
surface of said stop, means coupling said wheel
by said table having the form of the envelope of
to said follower for coordinated angular adjust
the work as it is to be ground, a follower ?nger
ment relative to the work and to said pro?led
presented to a longitudinal line on the pro?led
stop, respectively, and means for adjustably mov
surface of said stop, means for adjusting the
ing said wheel toward the work perpendicular to
angularity of presentation of the said wheel and
the axis of the wheel, while maintaining the rela
tionship of the axis of angular setting of the
the said follower to the work and to said pro?led
wheel to the angular setting axis of the follower.
stop, respectively, adjustable means for synchro
3. In a circular form tool grinding device of the
nizing the radial swinging arc of the working
class described, a work-guiding table, a turn
contact point of said wheel with the radial swing
2,412,663.
7
8
feed is released.
8. In a circular form tool grinding device of
the class described, a work-guiding table, a work
gularity of presentation of the said wheel and
the said follower to the work and to the stop re
spectively, means for adjustably moving said
wheel toward the work along the plane of its
presentation to the work, releasable manual
means for feeding said work-table toward said
Wheel, and means biasing said table in the di
grinding abrasive wheel, a pro?led stop carried
rection of said wheel when said manual feed is
ing arc of the contact point of said ?nger, re.
leasable means for feeding said work-table to
ward said wheel, and means biasing said table
in the direction of said wheel when said manual
released.
by said table having the form of the envelope of
11. In a circular form tool grinding device of
the work as it is to be ground, a follower ?nger 10
the class described, a work-guiding table, a work
presented to a longitudinal line on the pro?led
grinding abrasive wheel, a pro?led stop carried
surface of said stop, means coupling said wheel
by said table having the form of the envelope
to said follower for coordinated angular adjust
of the work as it is to be ground, a follower ?nger
ment relative to the work and to said pro?led
stop, respectively, adjustable means for synchro 15 presented to a longitudinal line On the Pro?led
surface of said stop, means coupling said wheel
nizing the radial, swinging arc of the working
to said follower for coordinated angular adjust
contact point of said wheel with the radial swing
ment relative to the work and to said pro?led
ing arc of the contact point of said ?nger, releas
stop, respectively, means for adjustably moving
able manual means for feeding said work-table
toward said wheel, and means biasing said table 20 said wheel toward the work along the plane of its
presentation to the work, releasable manual
in the direction of said wheel when said manual
means for feeding said work-table toward said
feed is released.
wheel, and means biasing said table in the di
9. In a circular form tool grinding device of
rection of said wheel when said manual feed is
the class described, a work-guiding table, a turn
‘
table, a work-grinding abrasive wheel mounted 25 released.
12. In a circular form tool grinding device of
on said turn-table for angular adjustment to the
the class described, a work-guiding table, a turn
work, a pro?led stop carried by said table hav
table, a work-grinding abrasive wheel mounted
ing the form of the envelope of the work as it is
on said turn-table for angular adjustment to the
to be ground, a follower ?nger presented to a
longitudinal line on the pro?led surface of said 30 work, a pro?led stop carried by said table having
the form of the envelope of the work as it is to
stop, a ?nger swivel bracket coupled to said turn
be ground, a follower ?nger presented to a lon
table whereby angular adjustment of both said
gitudinal line on the pro?led surface of said stop,
wheel and said follower ?nger may be coordi
a ?nger swivel bracket coupled to said turn-table
nated, adjustable means for synchronizing the
whereby angular adjustment of both said wheel
radial swinging arc of the working contact point
and said follower ?nger may be coordinated, ad
of said wheel with the radial swinging arc of the
justable means for synchronizing the radial
contact-point of said ?nger, releasable manual
swinging arc of the working contact point of said
means for feeding said work-table toward said
wheel with the radial swinging arc of the con
wheel, and means biasing said table in the direc
tact point of said ?nger, means for adjustably
tion of said wheel when said manual feed is re
moving said wheel toward the work along the
leased.
plane of its presentation to the work, releasable
10. In a circular form tool grinding device of
manual means for feeding said work-table toward
the class described, a work-guiding table, a work
grinding abrasive wheel, a pro?led stop carried
saidwheel, and means biasing said table in the
by said table having the form of the envelope of 45 direction of said wheel when ‘said manual feed
the work as it is to be ground, a follower ?nger
presented to a longitudinal line on the pro?led
surface of said stop, means for adjusting the an
is released.
WALTER F. ROSS.
Документ
Категория
Без категории
Просмотров
0
Размер файла
791 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа