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Патент USA US2108310

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Feb: 35» 193»
H. J. GRIFFING
2,3085%
ROLL GRINDING MACHINE
Filed Dec. 20, 1935
97967C3
Z4
90
45
FIG.5 _4,z
z
2 Sheets-Sheet l
SQ
5/52\\
654
55
HERBERT J.
GR/FF/NE
Feb, 15, 1938.
H. J. GRIFFING
2,1083%
ROLL GRINDING MACHINE
Filed Dec. 20, 1935
2 Sheets-Sheet 2
20
92 /04
03 9/
‘FIG.
HERBERT J. GR/FF/NE
Patented Feb. 15, 1938
‘ -
UNITED STATES PATENT OFFICE
2,108,310
ROLL GRINDING MACHKNE
Herbert J. Grilling, Worcester, Mass, assignor
to Norton Company, Worcester, Mass, a cor
poration of Massachusetts
[application December 20, 1935, Serial No. 55,444
14 Claims.
This invention relates to a cylindrical grinding machine, and more particularly to a crown-
ing apparatus for 3.14011 grinding machine.
One of the objects of this invention is to provide a simple, thoroughly practicable roll crown-
ing attachment for a roll grinding machine. Another object is to provide a roll crowning apparatus for a grinding machine which is simple and
rugged in construction and is readily adjustable
m to vary the extent of crown produced on a roll
being ground.
Another object of this invention is to provide
a roll crowning apparatus for a grinding ma-
chine, in which the wheel slide is rocked tc15 ward and from the roll being ground, and a
(Cl. 51-435)
the usual head and rootstock (not shown)
which serve to rotatably support a roll I5 to be
ground. The roll I5 may be mounted on ceri
ters,~as. is common practice in the art, or if de
sired may be mounted in journal rests as shown -5
in the prior patent to Norton NO- 1.995133 dated
May 12, 1914, to which reference may be had for
the details of the support for the work.
A rotatable grinding wheel 20 is supported on
a rotatable wheel spindle 21 which is in turn 10
supported on a wheel slide 22. The wheel slide
22 is connected by a pair of aligned studs or trun
nions 23 arranged on Opposite Sides of the Wheel
slide, and which are supported on a transversely
movable intermediate slide 24. The studs or 15
mechanism is provided for rocking the wheel
trunnions 23 which form a pivotal connection
slide in timed relation with the relative longi-
between the wheel slide 22 and the interme
tudinal movement between the wheel and work
support. A further object is to provide a crown2:) ing attachment in which the backlash in the
driving mechanism is eliminated so that the rela-
diate slide 24 are‘ preferably located parallel to
and directly below the axis of the grinding wheel
and its supporting wheel spindle. The inter- 20
mediate slide 26 is arranged t0 Slide transversely
tive approaching movement between the wheel
and the work piece to produce the desired crown
is ‘accurately controlled as the wheel and work
rnove relatively in traversing in each direction.
on the base .40 on a pair of spaced slideways 25
(only one of which has been shown). The in
termediate slide 24 is arranged to be moved trans
versely relative to the base it by means of a 25
Other objects will be in part obvious and in part
pointed out hereinafter.
This invention accordingly consists in the ieatures of construction, combinations of elements,
30 and arrangements o‘f-parts, as will be exempli?ed
in the structure to be hereinafter described, and
the scope of the application 01‘ which will be
indicated in the following claims.
In the accompanying drawings, in which is
3' shown one or" various possible embodiments of
the mechanical features of this invention,
suitable wheel feeding mechanism. This mech
anism may be of any of the well-known types,
such as, for example, that shown in the prior
U. S. Patent to Norton No. 762,838 dated June
14, 1904. This mechanism may comprise a half 30
nut 28 depending from the intermediate slide 24.
The half nut 23 mates with a rotatable feed
screw '29 which is journaled in bearings (not
shown) in the base ill. The front end of the
feed screw 2., is provided with a gear 30 which 35
meshes with a gear 3i mounted on the rear end
, Fig. l is a cross sectional view through a
of a rotatable shaft 32.
grinding machine, showing the improved roll
tatably supported in the base Ill and is provided
crowning apparatus having parts broken away to
.30 more clearly show the operation of the mecha-
nism;
Fig. 2 is a horizontal sectional view, taken approximately 0n the‘ line ‘3-2 of Fig. 1;
Fig. 3 is a fragmentary sectional view, on an
a: enlarged scale, taken approximately on the line
3-3 of Fig. 1; and
Fig. ll shows a modi?cation of the construction shown in Fig. 1.
A cylindrical grinding machine of the roll
The shaft 32 is ro
on its front end with a gear 33 meshing with a‘
gear 31% mounted on arotatable shaft 35,the outer 40
end of which supports a manually operable hand
wheel 35. By rotating the hand wheel 39, a
rotary motion is transmitted to the gears above
described to rotate the cross feed screw 29 which
serves to cause an endwise movement of the half 45
nut 28 to feed the intermediate slide 24 and the
wheel slide 22 either toward or from the work
piece IS.
In the grinding of cylindrical rolls for a, roll
grinding type has been illustrated in the drav -
ing mill, it is frequently necessary to produce a 50
ings, ccmprising'a base it which supports a longitudinally movable work supporting table H on
roll which is not a true cylinder, but which is pro
vided with a cylindrical surface which is crowned
a ?at way l2 and a V~way 53 ‘for a longitudinal
either concave or convex to a de?ection curve
movement relative to the base it. The longitudinally l‘?ciprocable table l l is provided with
or otherwise, according to the requirements of the
rolling mill. In the machine as illustrated in the 55
2
2,108,310
drawings, the form or crown on the roll is pro
duced by rocking the wheel slide 22 about its
pivot 23 and relative to the transverse slide 24
as the roll i5 and wheel 20 are reciprocated lon
gitudinally relative to each other.
In the construction illustrated in the drawings,
the Work supporting table l l is reciprocatecl lon
gitudinally relative to the base If; and the grind
ing wheel 23 to traverse the roll being ground
10 past the operative face of the grinding wheel 29.
The table ii is provided with a depending rack
bar 40 which is engaged by a manual or power
traverse mechanism, such as that shown in the
prior Norton Patent No. 762,838 dated June 14,
15 1904. This mechanism is not considered part
of the present invention and consequently has
not been illustrated.
This mechanism is a con
ventional, well-known mechanism for reciprocat
ing the work table and it is, therefore, believed
20 unnecessary to illustrate such a mechanism in
detail in the present case.
Reference may be
had to the prior patent above-mentioned for
details of disclosure.
In order to produce a predetermined rocking
25 motion of the wheel slide 22 to rock the wheel 26
toward and from the axis of the roll l5, it is de
sirable to provide a mechanism to time the rock
ing motion of the wheel with the longitudinal
relative reciprocation between the wheel 2%! and
the roll I5. This is preferably accomplished by
providing a gear 45 which meshes with the table
driving rack 49 on the under side of the table
II. The gear 45 is mounted on a rotatable shaft
46 which is journaled in bearings in the base IQ
of the machine. The rear end of the shaft 46
is provided with a gear M meshing with a gear
48 mounted on a rotatable shaft 49. The shaft
49 also carries a gear 50 which meshes with a
gear 5! mounted on a rotatable shaft 52. The
40 shaft 49 and the gears 48 and 50 carried thereby
are supported on a swinging arm 53 which is sup
ported to rotate on the shaft 46. This permits
the gear 5| to be changed when desired and the
gear 50 to be swung into proper mesh with the
gear 5| and locked in mesh therewith by a clamp
ing screw 54 which passes through the bracket
53 and is threaded into a portion of the base it.
The shaft 52 is preferably formed integral with
a splined shaft 55 which passes through a cor
respondingly shaped aperture within a worm 56
which is rotatably supported within a gear cas
ing 57. The gear casing 51 is rigidly ?xed to the
transversely movable slide 24. The worm 55
meshes with a worm gear 60 which is mounted
on a transverse shaft 5! journaled in bearings
(not shown) within the gear casing 5?. The
shaft 6! supports a rotatable cam 62 which is
arranged to engage a follower roller 64 which is
rotatably supported on a stud 65. The stud 55
60 is supported on the pivotally mounted wheel
slide 22. From the foregoing description, it will
be readily apparent that when the table i I is
reciprocated longitudinally on the base ill, the
rack bar 43 serves to rotate gear 45, the shaft 55,
65 the gear 4i’, the gear 48, the gear 50, the gear
5|, the worm 55, the worm gear 60, to rotate the
cam 22 which serves through the roller 64 to rock
the wheel slide 22 about its pivot 23 to cause the
periphery of the wheel to move toward or from
70 the axis of the roll l5 being ground.
By changing the gear 52 or interchanging the
gears 41 and 48, the extent of rotation of the
cam 62 may be varied for a given length of re
ciprocable movement of the table I i, which serves
75 to vary the extent of rocking of the wheel 20 to
ward and from the work axis and thereby to vary
the crown produced upon the roll being ground.
The change gears above described serve to
change the crown produced on the roll being
ground.
The change produced by the changing of gears,
however, does not readily permit slight variations
e:
in the crown but it has been necessary in the
past with such mechanisms to provide a different
cam to provide the desired changes in extent of
crown produced. To facilitate a ?ne adjustment
of the rocking movement of the wheel slide 22
to vary the extent of crown produced on the roll
25, a readily adjustable means is provided to
permit a quick adjustment of the extent of rock—
ing movement without the necessity of chang
ing the change gears or the cam.
As illustrated
in the drawings, the follower roller 64 is sup
ported on. the stud 65 which is preferably sup
ported on the end of a lever ‘ill.
The inner end ~'=-'.
of the lever ‘If! is anchored against longitudinal
movement by means of a stud ll which is sup
ported in bearings 12 and 13 which are ?xed
to the intermediate slide 24. A bushing 14 of
square cross section is mounted on the stud ‘H :.'
and is arranged to ?t therewithin an elongated
aperture 75 formed in the lever ‘H! and is held in
place therein by means of an end cap 16. The
stud ‘H and the bushing 74 are held in a ?xed
position relative to the intermediate slide 24 and :3
are arranged so that the lever 7&3 may be moved
vertically due to the aperture '55 within the
lever. A roller 80 is mounted on a stud 3| which
is supported on the lever ‘Ill and the roller 38 is
arranged to contact with a projection 82 of the
wheel slide 22.
In order to modify the action of the lever ‘iii in
transmitting the motion of the cam 62 to vary the
rocking movement of the grinding wheel 20 to~
ward and from the axis of the roll !5, it is de 4.0
sirable to provide means for adjusting the lever
arms so that the motion transmitted by the cam
62 may be varied from the maximum throw of
the cam 62 to zero.
This is preferably accom
plished by providing a pair of adjustable ball
bearing rollers 85 and 86 (Fig. 3) which are
mounted on oppositely projecting trunnions 8'!
and 88. The rollers 85 and 86 bear against and
roll on a surface 89 on the transversely movable
intermediate slide 24. The trunnions ill and 88 ;"
are preferably formed integral with a nut 90
which mates with a rotatable adjusting screw 9!
which is supported in a bearing 92 on the inter
mediate slide 24. The end of the screw BI is
provided with a beveled gear 93 meshing with a ;'
bevel gear 94 which is provided with an outwardly
extending rotatable shaft 95 by which the screw
9| may be rotated. In order to facilitate adjust~
ment of the rollers 85 and 36, a second pair of
anti-friction rollers 95 and 98 are mounted on #1"
the trunnions 8'! and 83 and are arranged to en
gage the under surface 97 of the lever 16. By ad»
justing the position of the nut 99 by turning the
screw 9|, the lever arm between the trunnion 87
and the stud Bl may be varied to adjust the ex
tent of the throw of cam 62, and thereby vary by
minute increments the extent of crown produced
on the roll l5.
In the position of the parts as illustrated in
Fig. 1, the distance between the center of the TO
stud 85 and the stud 8| is equal to the distance
between the stud 8| and the studB'l so that when
the cam is rotated, upward motion of the roll 64
serves to rock the lever ‘l0 about the surface of
the rollers 85 and 86 as a pivot, so that the roller 75
' I 2,108,310
8|] is raised or lowered to transmit a correspond
> ments may be'made of the above invention and as
ing movement to the pivotedwheel ‘slidet'22. .If . many changes might be made in the embodiment
desired, to reduce the extent of crown,>the shaft , .abovev set forth, it is vto be understood - that all
matter hereinabove set forth or shown in the
95 may be rotated'to turn the screw 9| andad
just the nut '90 toward the-right, as viewed in Y accompanying drawings is to be interpreted as; 5
‘Fig. 1, so that the stud 81 approaches the stud ‘8 !. illustrative and not in a limiting sense.
thereby shortening. the‘ lever .arm distance ~be- ~
1; A grinding machine comprising a base,
tweenthe'studs 80 and 8|. ‘The extent'o-frrock
ing motion of the 'wheel‘may be varied from? the rotatable grinding wheel and a rotatable work
maximum, as'shown in‘the position'of the “parts 1 support which are movable longitudinally ‘relative: £10
to each other, atransversely movable slide, a
‘ illustratedgin Fig. 1, to zero’by adjusting-the po
sition of. the rollers .85 and‘ BBw-longitudinallyon - pivotally mounted support on said slide for said
‘the surface~89 by rotation of‘screw 9i. i‘ If. the ‘grinding wheel; means to move said slide to cause
rollers 85 and'86 are moved'sowthat the :axis of 11 a relativeapproaching or receding movement be
15' thestud B‘Iis in a'vertical plane with the axisiof
:the‘stud 8|, then any :motion transmitted byv the
tween the grinding wheel and Work support, aL§l5
rotatable cam on. said slide which is rotated in
' cam to'roller'iillserves-merely to rock the. lever timed relation with said longitudinal movement,
‘ .‘Hi on'the ‘stud 8i as a pivot: andxtransimitsi no . afollower roller arranged to‘engage said cam,
rocking motion: to the wheeljs2il andwould serve : and a lever to support said roller which is an
chored to said slide and is arranged to engage’if20
20 to grind a true cylinderzon' the work piece.
‘By providing an‘adjustment- of thistype, it is said pivotally mounted: support to rock thegrind
obvious that :the 'EXtEI’ltuOf‘CYOWl'I produced by ‘a . ing wheel.
. 2.!A grinding machine comprising a base, a
given set of change gears and cam'i62 may: be
varied minutely tov produce-tha-desired. curva 1 rotatable grinding wheel and a rotatable work
support-which are movable ‘longitudinally relai-F25
ture or. crown on the roll-being ground.
tive to'each other, a transversely movable slide,
‘ A modi?ed construction .hasrbeen illustrated in
‘Fig. 4 in which thefollower roller 64 is mounted a pivotally mounted support on said slide for said
grinding wheel, means to ‘move said slide to cause
which is pivotally mountedon a'stud Hll ?xed 1 a relative approaching or receding movement be
in a depending projection 1.02. ofuthe. pivotally 1 tween the grinding wheel and work support, ai'l‘iiO
- on the stud 65 on-the outerend of a lever I00
mounted’ wheel support 22. 'An-adjustable ful
rotatable cam on. said slide which is rotated in
crum roller I03 is arranged-to ‘engage-‘the under
side of the ‘opposite end of thelever 400. 1 The
timed relation with said longitudinal movement,
a lever to support said roller which is anchored
1 fulcrum roller‘ I03 is mounted on a: stud .104 so
to said slide, and a roller mounted on ‘said lever
that by adjustment-of the. position of the fulcrum ' between‘ the 'follower'roller and‘ the anchor whichi?35
roller-.103 the lever arm distancebetween' the stud
I0! and the stud I'M may .be varied to vary the
extend 10f rocking motion. transmittedto .the
Wheelsupport ,by the. cam .62. ’ I. The construction
40 of‘thezfulcrum .rollermay. beathe sameas illus—
bears against a portion of ' the pivotally mounted
support to rock said grinding wheel during the
longitudinalv movement between the‘. wheelzgand
work support.
3. A grinding machine comprising a base,. all-40
trated in‘Fig. 3; thatlis. the fulcrum roller I03 . rotatable grinding‘ wheel and a rotatable work
may be formed as a pair of .spaced ball bearing
rollers which are arranged. to engage‘ the surface
89 on the transversely zmovableislide?ll, and a
45 pair of anti-frictionrollers of'smaller diameter
which are mounted'on the Stlldl‘l04 are arranged
to. engage the .under surface: 1912of‘the lever 1.00.
support which are movable longitudinally» and.
transversely relative to each other, meanslto
reciprocate. said grinding wheel and work sup
port longitudinally relative to each other, meansaiii5
tolfeedsaid grindingwheel‘ and work support
‘transversely relative to each other, a pivotally
. mounted support for said grinding wheel, a rotat~
able cam which is rotated in timed relation with
roller is obtained in thesame manner. The stud
, I04 is preferably formed as'an integral part of - said longitudinal reciprocationg a follower rollerp‘?o
The. adjustment .of :the; p'osition..:of the fulcrum
the nut 90 which meshes with the feed screw.9l.
The feedscrew 9| isasupported inthebearingz92.
The end of, the screw is :provided with-the bevel
a lever supporting said follower roller; means to
anchor. said lever against longitudinal movement
but permitting movement thereof, a roller mount
gear 93 meshing‘with a bevel gear 94 .mounted ' ‘ed on- said lever between the follower roller and
the anchor which bears against a portion‘ofi thee¥55
‘£95, the bevel gears and thesc-reware rotated to - wheel support, and an adjustable roller which is
on the end of a'shaft‘95. -' By rotationz'of- the shaft
adjustthe positionof'the'nut 9ll‘andithereby ad
just the position :of' the: fulcrum roller [03 to .vary
the extent of rocking motion. transmitted to the
"60
carried by said slideand‘which bearsagainst the
under side of‘ said lever adjacentto the anchored
_ end thereof to serve as a fulcrum. for said lever.
4. A grinding. machine comprising abase, aiF-GO
The operation .of :the construction shown in rotatable grinding wheel and‘ a rotatable‘ work
~"Flgs. 1 and 4 is readily-1.‘apparentfrom the fore : support which are movable longitudinally vand
going disclosure. 'The roll‘ ‘I5 to be ground ‘is ‘ transversely relative to ‘each other, means ‘to .re—
ciprocate said grinding wheel and work support
mounted: inthe machine. ' Theifulcrumlroller is
wheel support 22.
,
'
.05 . adjusted longitudinally‘ to give the desired 'rock
‘ longitudinally relative to each other, means tot-‘:65
feed said grinding wheel and work support trans
ing wheel 29‘ during the ‘relative longitudinal re ' versely relative to each other, a pivotally mounted
ciprocation of the‘wheel' 20 and ~theroll IE to support for said grinding Wheel, arotatablecam .
produce a predetermined crownon the roll being ‘,Which is rotated in timed relation with the longi~
‘ ing motion of the wheel support to rockthe grind
ground.
It will thus be seenthat thereihassbeen- pro
vided by this, invention apparatus in. which the
various objects hereinabove set forth‘ together
with many; thoroughly practicaladvantage‘s are
' tudinal reciprocation, a follower roller, a leveni'rio -
supporting said follower roller, means to anchor
said lever against longitudinal. movement but
permitting a rocking movementthereof, a'roller
mounted on said lever between the follower roller
successfullyachieved. 2As=many possible embodi- ' and the anchor which bears against a portion of%;1~75
4
2,108,310
the wheel support and an adjustable roller which
is carried by said slide and which bears against
the under side of said lever adjacent to said an
chor to serve as a fulcrum for said lever.
5. A grinding machine comprising a base, a
rotatable grinding wheel and a rotatable work
tatable grinding Wheel and a rotatable work sup
port which are movable longitudinally and trans
versely relative to each other, means to recipro
cate said grinding Wheel and Work support longi
tudinally relative to each other, means to feed said
grinding wheel and work support transversely rel
support which are movable longitudinally relative
ative to each other, a pivotally mounted support
to each other, a transversely movable slide on
said base to support one of said elements, means
for the grinding wheel, a rotatable cam which is
10 to feed said slide transversely relative to the base,
a rotatable grinding wheel, a wheel support rotat
ably to support said grinding wheel, pivotal con
nections between said wheel support and said
slide, said pivot being located directly below the
15 work aXis and arranged to maintain the same
relative position with relation to the wheel axis
as the wheel is advanced due to wheel wear, a
rotatable cam mounted on the rear end of said
rotated by‘ and in timed relation with said relative
longitudinal reciprocation, a follower roller ar 10
ranged to engage said cam, a lever supporting said
follower roller, means to anchor said lever against
longitudinal movement but permitting vertical
movement thereof, a roller carried by said lever
and located between the follower roller and the 15
anchor which bears against a portion of the wheel
support, an adjustable roller which bears against
the under side of said lever adjacent the anchored
slide, means to rotate said cam by and in timed
end thereof to serve as a fulcrum for said lever,
20 relation with the longitudinal movement between
and means to adjust the position of said roller to
the grinding wheel and work support, a follower
vary the length of the lever arm so as to adjust
roller, a lever supporting said follower roller,
means to anchor said lever against longitudinal
movement but permitting a rocking movement
the extent of rocking motion transmitted by said
25 thereof, a roller mounted on said lever between
the follower roller and the anchor which bears
against a portion of the wheel support, and an
adjustable roller which is carried by said slide
and which bears against the under side of said
30 lever adjacent to the anchored end thereof to
serve as a fulcrum for said lever.
6. A grinding machine comprising a base, a
longitudinally reciprocable work table, a rotatable
work support thereon, a transversely movable slide
35 on said base, means to feed the slide transversely
relative to the base, a rotatable grinding wheel, a
wheel support to rotatably support said grinding
wheel, pivotal connections between said wheel sup—
port and said slide, said pivot being located di~
40 rectly below the wheel axis, means to reciprocate
said work table longitudinally, a rotatable cam
cam to the wheel slide and vary the extent of
crown produced on the work piece being ground.
9. A grinding machine comprising a base, a lori 25
gitudinallyireciprocable work table, a rotatable
work support thereon, a transversely movable slide
on said base, means to feed the slide transversely
relative to the base, a rotatable grinding wheel, a
wheel support to rotatably support said grinding 30
wheel, pivotal connections between said wheel
support and said slide, said pivot being located di
rectly below the wheel axis, a rotatable cam
mounted on the rear end of said slide, means to
rotate said cam by and in timed relation with the
table reciprocation, a follower roller, a lever sup
porting said follower roller, means to anchor said
lever against longitudinal movement but permit
ting vertical movement thereof, a roller inter
mediate the follower roller and said anchor which
bears against a portion of said wheel slide, and an
. mounted on the rear end of said slide, means to
adjustable roller which bears against the under
rotate said cam by and in timed relation with the
table reciprocation, a follower roller, a lever sup
45 porting said follower roller, means to anchor said
side of said lever adjacent the anchored end to
lever against longitudinal movement but permit
ting movement thereof, a roller mounted on said
lever between the follower roller and the anchor
which bears against a portion of said wheel sup—
50 port, and an adjustable roller which is carried by
said slide and which bears against the under side
of said lever adjacent the anchored end thereof
to serve as a fulcrum for said lever.
'7. A grinding machine comprising a base, a ro
55 tatable grinding wheel and a rotatable work sup
port which are movable longitudinally and trans
versely relative to each other, means to reciprocate
said grinding wheel and work support longitudi
nally relative to each other, means to feed said
60 grinding wheel’ and work support transversely rel
ative to each other, a pivotally mounted support
for the grinding wheel, a rotatable cam which is
rotated by and in timed relation with said relative
longitudinal reciprocation, a follower roller ar
65 ranged to engage said cam, a lever supporting
said follower roller, means to anchor said lever
against longitudinal movement but permitting a
rockingmovement thereof, a roller carried by said
serve as a fulcrum for said lever.
10. A grinding machine comprising a base, a
longitudinally reciprocable work table, a rotatable
work support thereon, a transversely movable
slide on said base, means to feed the slide trans~
versely relative to the base, a rotatable grinding
wheel, a wheel support to rotatably support said
grinding wheel, pivotal connections between said
wheel support and said slide, said pivot being lo~
cated directly below the wheel axis, a rotatable
cam mounted on the rear end of said slide, means
to rotate said cam by and in timed relation with
the table reciprocation, a follower roller, a lever
supporting said follower roller, means to anchor
said lever against longitudinal movement but per
mitting vertical movement thereof, a roller inter
mediate the follower roller and said anchor which 60
bears against a portion of said wheel slide, an ad
justable roller which bears against the under side
of said lever adjacent the anchored end to serve
as a fulcrum for said lever, and means to adjust
the position of said roller to vary the length of 65
said lever arm to adjust the extent of rocking
motion transmitted by said cam to the wheel slide.
11. A crowning attachment for roll grinding
lever and located between the follower roller and
machines of the type in which a rotatable work
70 the anchor which bears against a portion of the
support and a rotatable grinding wheel are recip 70
wheel support, and an adjustable roller which' rocated longitudinally and transversely relative to
bears against the under side of said lever adjacent
each other, comprising a transversely movable
the anchored end thereof to serve as a fulcrurn for
slide, a wheel support for said wheel which is piv
said lever.
otally mounted to said slide, a rotatable cam, driv
8.. A grinding machine comprising a base, a ro
75
ing means for said cam which is operated in timed 75
5
2,108,310
relation with the relative longitudinal recipro
catory movement, a follower roller for said cam, a
lever supporting said follower roller, an anchor
for said lever which is supported ‘on said slide
and arranged to hold said lever against longitudi
nal movement but permitting vertical movement
thereof, a roller intermediate said anchor and said
follower roller and supported on said lever and ar
ranged to engage a portion of the wheel support,
10 and a roller supported on the intermediate slide
which serves as a fulcrum for said lever.
12. A crowning attachment for roll grinding
machines of the type in which a rotatable work
sup-port and a rotatable grinding wheel are re
15
ciprocated longitudinally and transversely rela
tive to each other, comprising a transversely mov
able slide, a wheel support for said wheel which
is pivotally mounted to said slide, a rotatable cam,
driving means for said cam which vis operated in
20 timed relation with the relative longitudinal re
ciprocatory movement, a follower roller for said
cam, a lever supporting said follower roller, an
anchor for said lever which is supported on said
slide and arranged to hold said lever against
25 longitudinal movement but permitting vertical
movement thereof, a roller intermediate said
anchor and said follower roller and supported on
said lever and arranged to engage a portion of the
wheel support, a roller supported on said slide
30 and arranged to engage the under side of said
lever adjacent the anchored end thereof, and
means to adjust the position of said roller to
vary the lever arms between said roller and the
intermediate roller so as to vary the extent of
35 rocking movement of said wheel support so as to
adjust the extent of crown on said work.
13. A grinding machine comprising a base, a
rotatable grinding wheel and a rotatable work sup
port which are movable longitudinally and trans
40 versely relative to each other, means to recipro
cate said grinding wheel and Work support longi
tudinally relative to each other, means to feed
the grinding wheel and work support transversely
relative to each other, a pivotally mounted sup
port for the grinding wheel, a rotatable cam
which is rotated by and in timed relation ‘with
said relative longitudinal reciprocation, a fol
lower roller engageable with said cam, a lever
supporting said follower roller at one end thereof,
means to anchor said lever against endwise
movement, said lever being arranged so that mo 10
tion of the cam is transmitted through the lever
to rock said wheel support, a fulcrum roller
which is arranged to engage the opposite end of
said lever, and means to adjust the position of
said fulcrum roller to vary the lever arm and 15
thereby vary the extent of rocking movement of
the grinding wheel.
14. A grinding machine comprising a base, a
rotatable grinding wheel and a rotatable work
support which are movable longitudinally and 20
transversely relative to each other, means to
reciprocate said grinding wheel and work support
longitudinally relative to each other, means to
feed the grinding wheel and work support trans
versely relative to each other, a pivotally mounted 2,5
support for the grinding wheel, a rotatable cam
which is rotated by and in timed relation with
said relative longitudinal reciprocation, a fol
lower roller engageable with said cam, a lever
supporting said follower roller at one end thereof, 30
pivotal connections between said lever and said
wheel support, said lever being arranged so that
motion of said cam is transmitted through the
lever to rock the wheel slide, a fulcrum roller '
which is arranged to engage the opposite end of 35
said lever, and means to adjust the position of
said fulcrum roller 'to vary the lever arm and
thereby vary the extent of rocking movement
of the grinding wheel.
'
40
HERBERT J. GRIFFING.
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