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Патент USA US2403409

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July 2, 1946-
G. E. STRAHM
‘
2,403,409
HONING TOOL
Filed Sept. 22, 1943
C1
2 Sheets-Sheet 1
27 K
.
27
6942/1090
BY
Y
.
29
INVENTOR.
STQAHM,
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(rm/54f,
ATTORN EY.
July 2, 1946-
G. E. STRAHM ‘
‘
2,403,409
HONING TOOL
Filed Sept. 22, 1945
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INVEOR.
STEAHM,
BY
AT
T_ORNEY.
Patented July 2, 1946
r 2,403,409
UNITED STATES PATENT’ OFFICE
' 2,403,409
‘HONING TOOL
Gaylord E. Strahm, Los Angeles, Calif.
Application September 22, 1943, Serial No. 503,320
11 Claims.
1
(01. 51—194)
My invention relates to and has for a purpose
the provision of a‘device or tool for honing the
interior surfaces of cylindrical pieces of work such
as engine cylinders, tubes, and the like.
‘
It is also a purpose of my invention to» provide .
a honing tool which embodies means for support
ing part of a strip of abrasive and ?exible mate
rial such as emery cloth, in substantially cylin
drical form for insertion into a cylindrical piece
of work to hone the interiorsurface of the latter I
by relatively rotary movement of the two, and
where the abrasive strip is movably supported so
that when that part thereof having the cylindri
cal form loses its abrasive property by reason of
its honing action the strip can be fed lengthwise .
to present successively new and unused strip parts
to the work being honed, and where such strip
feeding is accomplished without'removing the too-1
from the work.
2
In the accompanying drawings:
Fig. 1 is- a view showing in side‘ elevation one
form of honing tool embodying my ‘invention.
Fig. ‘2 ‘is an enlarged longitudinal sectional view
taken on the line 2—2 of Fig.1. '
Fig. 3 is a transverse sectional view taken ‘on
the line 3-3 of Fig. 2.
'
»
Fig. 4 is a fragmentary plan view on a reduced
scale, of the honing tool with the honing “strip
omitted.
'
.
Fig. 5‘is‘a view on a reduced scale showingin top
plan the tool'of Fig. 1, with the tensioning mecha
nism for the abrasive‘ strip, and a support for the
tool as a whole.
Fig. 6 is a vertical sectional ‘view taken on the
line 6—6 'of Fig. 5.
'
Fig. v"i is a schematic View showing in’ plan an
other form of honing tool embodying my inven
tion.
-
‘
‘
1
It is also a purpose of my invention to provide :20 ‘Fig. 8 is a view similar to Fig. 1 showing a third
a honing tool embodying a head for holding a
form of honing tool embodying my invention.
part of the abrasive strip in circular form, which
is adjustable to vary the effective diameter of
such circular strip part to hone work of di?erent
inside diameters and to the degrees required, and.
where such adjustment may be effected and main
tained without removing the tool from the work
and without cessation in rotation-of the Work.
A further purpose of my invention is the provi
sion of a honing too-l which embodies a strip of 30
?exible material having an abrasive substance on
opposed sides thereof, and a second strip pref
erably made of ?exible metal, for reinforcing'the
abrasive strip to prevent tearing or distortion
thereof, and to facilitate adjustment thereof in _
the successive presentation of new portions to
the work.
A further purpose of my invention is the pro
Fig. 9 is a vertical sectional view taken on the
line 9-e-9 of Fig. 8.
>
Fig. 10 is an enlarged fragmentary perspective
view ofv a-modi?ed form of abrasive strip embody
ing my invention.
'
‘
1
Fig. 11 is a View ‘similar to Fig. 10 of another
form of abrasive strip embodying my invention.
Similar reference characters refer to similar
parts in eachof the several views.
Referring to the drawings in detail, my in
vention in its present embodiment comprises a
supporting tube S which, at its right hand end
as when viewed in Fig. 1, is either adapted to be
?xedly secured in the tool holder of a lathe for
insertion into a piece of rotating cylindrical work
to be honed or to be mounted on the spindle of
a lathe for rotation in the work where the work
vision of a honing tool in which that part of the
is stationary.
strip of abrasive material which has honing en ~10
On the leading end of the tube S at a point
gagement with the work, is arranged spirally to
exteriorly thereof, is a head H for supporting a
expose a greater area of' abrasive surface to the
portion of an abrasive element A in substantial
work to increase the honing action.
‘
ly circular form on the tube so that its outer sur
Other purposes of my invention are the pro
face can have honingengagement with the in
vision of an abrasive strip formed of a metal strip 45 terior of a piece of work when the two are ro
with a comminuted abrasive substance cemented
tated relatively. The head H is expansible to
to one side of the metal strip; or a metal strip and
render the circular form of the abrasive element
a fabric strip cemented to the former, and hav
variable in diameter either to hone work of dif
ing its exposed side provided with an abrasive
:ferent diameters or to hone a particular piece of
substance.
.
l
50 workto a precise'diameter.
I will describe only three forms of honing tools,
Manually adjustable means is mounted on the
three forms of honing strips, and one form of
tube 8 for e?ecting expansion of the head H, as
reinforcing strip, each embodying my invention,
well as to maintain any precise expansion there
and will then point out the novel features thereof
of. This meansmay include complemental cams
in claims.
55 C, and C1 movable axially in .opposite directions
2,403,409
3
4
on the tube, and in one direction or the other to
effect expansion of the head H or to allow con
mediate portion H can be wrapped around the
head I-I, its ends extended inwardly between the
traction thereof.
The head H may comprise a band, preferably
inturned and rounded ends 48 and 4|.of the sec
tions l5 and I8, and then through a slot 43 into
the tube S. At this point the two lengths 44
and 45 of the strip are twisted in opposite direc
tions about a pair of guide posts 46 ?xed in the
tube S and inclined and tapered so that as ex
tended therefrom, the two strip lengths are dis
of spring steel, which is made up of a large sec
tion l5 and a small section l6 in order that the
requisite uniform expansion may be attained by
the band as a whole. It will be understood, how—
ever, that the band may be in one piece, but
when so made‘uniformity in expansion is not at 10 posed at right angles to the cylindrical strip por
tion I1. From here the strip lengths are ex
tainable.
tended longitudinally within the tube to project
Both band sections l5 and I6 have smooth out_
from the right band end thereof where they are
er peripheries on which a portion I1 of the abra
accessible for manipulation, by hand, or for as
sive element A is supported in substantially cir
cular form, the element being con?ned thereon 15 sociation with a mechanism for tensioning the
against accidental edgewise displacement by ribs
l8 on the edges of the sections.
"
On their inner peripheries the band sections
are formed at spaced intervals with transverse
strip A and for feeding it lengthwise to present
new sections thereof to the work being honed.
In the present instance, this mechanism is
shown in Figs. 5 and 6 as comprising a cross
?ns 19, the inner edges of which are beveled to 20 head 58 secured in the right hand end of the
tube S by screws 5|. One end of a rod 52 is
form reversely disposed cams 20 and 2| which
secured in the cross head against removal and
engage the cams C and C1, respectively. These
rotation, and so as to extend axially from the
cams C and C1 are in the form of split annuli
sleeve S. The otherend of the rod 52 is secured
and are interposed between the head sections l5
and I6 and the tube S so as to be slidable in re 25 in a clamp 53 on one end of a support 54 which
may constitute the tool holder of an engine lathe.
lation to the cam ?ns l9, and to thereby cause
Adjustable lengthwise on the rod 52 and se
their cam faces 22 and 23 to coact with the edges
cured in any adjusted ,position by a set screw 55,
28 and 2| in effecting radial expansion of the
is a sleeve 56 to the opposite sides of which are
head H as a whole.
The head sections l5 and iii are preferably 30 secured, as by welding, a pair of plates 51 and
58 constituting a frame.
spaced one from the other, and mounted on the
tube S by pins 24, 24 and 25, 25, secured to the
inner sides of the sections l5 and I6 and slidable
A strip supply reel 68 is mounted between the
upper ends of the plates 51 and 58 on a belt 6|,
the latter being rotatable in the plates, and the
in sockets 26, 26, and 21, 21, ?xed to the outer
35 reel being secured thereto by a pin 62'. At its
periphery of the tube.
threaded end the bolt is provided with a nut 63,
The cams C and C1 are ?xed on the inner ends
while extending through the bolt head is an
of sleeves 28 and 29, respectively, and these
operating crank 64.
sleeves are arranged one within the other and
Adjacent their lower ends the plates 51 and
concentric of the tube S, with free axial move
ment to effect the required adjustment of the 40 58 are provided with suitable openings in which
a strip'receiving reel 65 is rotatably mounted.
This reel receives a stub shaft 66 having a nut
61 on'one end thereof, and an operating crank
68 on the other. The reel is secured to the shaft
by pin 69 so thatthrough'rotation of the crank
68 the reel can be rotated. Integral with the
Axial movement of the sleeves 28 and 29 simul
reel is a ratchet wheel 18 the teeth of which are
taneously and in opposite directions may be ef
adapted to be engaged by a pawl 1| pivoted on
fected by a manually rotatable collar K sur
the sleeve 56 as at 12 to lock the wheel, and con
rounding the outer ends of the sleeves, and hav
ing one portion 30 engaging the inner sleeve 28 50 sequently the reel 65, against rotation in a
counter-clockwise direction as when viewed in
with a right hand screw thread 3|, and another
cams. In order that the pins '24 and 25, and the
socket 26 and 21 may not interfere with such ax
ial movement of the sleeves, the inner sleeve 28
is formed with slots 28a and 281) (Fig. 4), while
45
the outer sleeve is provided with a slot 29a.
portion 32 pinned to the portion 30 and engag
Fig. 5.
.
As will be seen in Fig. 5, the abrasive strip A is
adapted to be wound uponthe supply reel 6|] with
ing the outer sleeve 29 with a‘ left hand screw
thread 33. Thus, by rotation of the collar K in
one direction or the other the sleeves are fed in 55 its‘ inner end extended into a suitable slot 60a
(Fig. 6). The free end of the strip is extended
opposite directions to move the cams C and C1
from
the reel inwardly through the tube S, around
toward or away from each other to expand or
the posts 46 and head H, and then rearwardly and
contract the head H.
outwardly through the tube S, 50 that it can
_ The collar portion 38 is confined on the tube
be wound about the receiving reel 65 and secured
Spagainst axial movement by the provision of an 60 thereto
by extending the free end into a suitable
annular tongue 34 ?xed on the tube and engag
groove 65a. ‘It will be understood that the pawl
ing a ring 35 within a groove 36, the ring being
1| permits free rotation of the reel 65- in a clock
made in two half sections as shown in‘ broken
wise
direction only, while the reel 68 is normally
lines in Fig, 2 to allow of its application to the
free
to be rotated by the crank 64. However,
65
tube. Both the ring 35 and the collar sections
once the abrasive strip has been arranged as de
30 and 32 are embraced by a sleeve 31 the ends
scribed the reel 68 can be locked against further
of which are bent inwardly to form. annular
rotation by an adjustment of the nut 63 inwardly
,?anges 38 and 39 which tightly embrace the col
lar section 32 and the ring, so that rotation of
the sleeve effects rotation of the collar and ring.
'
The ‘abrasive element Amay be in the
of a strip or ribbon of cloth having both
thereof coated with a suitable abrasive
stance such as particles of carborundum.
form
sides
sub
This
"abrasive strip is of such length‘ that its inter- "
on the bolt to drawthe plates 51 and 58 into tight
engagement with the edges of the abrasive strip.
With the abrasive strip arranged as just de
scribed su?icient tension may be imposed on the
stretches 44 and 45 thereof to draw the circular
portion H of the strip into snug engagement
with the head H, by moving the sleeve 56‘ out—
2,403,409
'6
multaneouslyunwound from a reel 13, and sep
arately rewound ‘upon reels ‘l4 and 15, it being
understood that suitable mechanism similar to
that shown in Fig. 5, for actuating the reels and
locking them against rotation following adjust
ment of the two strips, may be provided.
In Figs. 8 and 9 I have shown an embodiment
of my invention in which the honing portion of
the abrasive strip A may be spirally wound ‘on
the expanding head H, in order to present to the
wardly on the rod 52, and then securing the
sleeve in this position by means of the set screw
55, or by rotating the reel 60 in a counter-clock
wise direction, while the reel 65 is locked by the
pawl.
In practice, whether the honing tool rotates
and the work to be honed is stationary, or the
work rotates and the tool is stationary, as is ef
fected by the structure shown in Figs. 5 and 6,
?rst the tool and the work are moved relatively
axially. to cause the tool to be inserted into the
work to be honed a larger surface area of abra
sive material. The structure of the head H, the
cams C and C1 for expanding the head, and the
work so that the strip portion vI‘l can have an
abrasive contact with the inner wall of the work,
and thus under relative rotation of the two hon
ing of the wall can be e?ected. By rotation of
means for adjusting the cams, are all identical to
the form of honing tool shown in Figs. 1 to 4, ex
cept that the expanding head and cams are of
the collar K in the proper direction the cam C
and C1 can be moved away from each other to
increased length " to accommodate the convolu
expand the head H and thus increase the di
ameter of the strip portion I‘! to compensate for
tions of the abrasive strip. However, in order that
wear of the abrasive substance and thus increase .
the expanding head, the posts 16 and ‘I1 corre;
sponding in function to posts 46, are arranged as
shown in Fig. 9, and thus the parallel stretches of
the abrasive strip can be extended axially along
the abrasive strip may assume a spiral form on
the honing action to attain the desired internal
diameter of the work. It will be understood that
during this cam adjustment the sleeve 56 can be
moved inwardly on the rod 52 to compensate for
the increased diameter of the strip portion I1,
and from the tube ‘S.
Referring now to Fig. 10, I have here shown
a modi?ed form of abrasive strip wherein the
abrasive substance 18 is applied directly to one
or one reel or the other can be rotated in the
‘ proper direction to increase the length of the
abrasive strip between the reels.
face of the metal strip M, thereby avoiding the
As the honing action proceeds the abrasive
property of the strip portion l1 ?nally becomes
use of the abrasive strip A.
30
nil, so that it is necessary to replace the worn por
tion with an unused portion. This can be readily
'
'
>
'
In Fig. 11 I have shown another form of abra
sive strip wherein the fabric strip A has abrasive
material 18 on one side, while the other side is
accomplished by unwinding the strip from the
without abrasive material and is adapted to‘ be
reel -60 and rewinding it ‘upon the reel 65.
cemented to one side of the metal strip M.
Thus
_ '
Although I have herein shown and ‘described
only three forms of honing tools, three forms of
honing strips, and one form of reinforcing strip,
each embodying my invention, it is to be under
it will be understood that, this lengthwise adjust
ment of the strip can be repeatedly performed to
successively present to the work new portions of
the strip until substantially the entire strip has
stood that variouschanges and modi?cations may
been used.
An added function of the structure illustrated 40 be made therein without departing from the spirit
of my invention and the spirit and scope of the
in Figs. 5 and 6 is, that should the head H jam
appended claims.
within the work to such an extent that the ro
tating work sets the whole tool into rotation, the
holding action of the clamp 53 in respect to the
rod 152 is overcome to allow the entire tool to ro
I claim:
4 3 an eXpansi-ble head on the outside of said sup
tate with the work and thereby prevent any pos
sible damage to the abrasive portion I‘! of the
strip, or any other part of the tool.
,
1. A honing tool comprising a tubular support;
.
As previously described herein the abrasive
strip A has abrasive material on opposite sides
thereof. The abrasive material on the outer side,
which is presented to the work at the circular
portion I1, operates to produce the honing action.
The abrasive material on the inner side of the
strip, which is presented to the outer surface of '
the head H, operates to prevent any slippage of
the strip on the head during the honing opera
tion, and holds the strip portion in circular for
port; and guide members in said support so con
structed and arranged that two connected lengths
of ?exible and abrasive material positioned longi~
tudinally within said support, can be extended
radially outward of the support and around 'said
head to cover the latter to provide a substantially
circular abrasive medium for said head; comple
mental cams between said head and said support
movable lengthwise of said support to ei‘fect'ra
dial expansion of said head; sleeves secured to
said cams for lmovement lengthwise on said sup
port; and a collar threadedly engaging both of
said sleeves so that by rotation of said collar said
cams will be moved in opposite directions to ex
mation to prevent distortion or tearing thereof.
In Fig. 7 I have shown a modi?ed form of GO pand said head.
2. A honing tool comprising: means for sup
honing tool in which is embodied a thin strip M
porting a portion of a length of ?exible and abra
of metal such as spring steel or shim stock, which
sive material in substantially circular form within
is preferably the same width as the abrasive strip
A. This metal strip is provided for the purpose
a cylindrical piece of work, so that by rotation ‘of
of reinforcing the abrasive strip to prevent pos
the work and said material relatively, the inner
sible tearing thereof and toiacilitate adjustment
surface of the work will be honed; and means
of the abrasive strip lengthwise in the successive
correlated to the ?rst mentioned means and ax
presentation of its portions to the head H in the
ially removed from said ?rst-mentioned means by
manner previously described. Here again the
which said material can without removing it from
abrasive strip has abrasive material on its inner ~
side as well as on its outer side so as to bite into
the metal strip M and thereby cause the two
strips to move lengthwise together in e?ecting
adjustment of the abrasive strip. As shown in
Fig. 7, the strips A and M are adapted to be si
the work, be adjusted lengthwise of said support
ing means to present successively to the work new
portions thereof as the succeeding portion loses
its abrasive property.
3. A honing tool comprising: a tubular sup
port; a head exteriorly on said support; a ?exible
2,403,409
7
8
metallic strip; a second flexible strip having abra
sive material on opposite sides thereof; said strips
extending around said head, with the metallic
arranged at such‘ an angle to‘ the axis of said
support that a strip of abrasive‘ material-can be
extended in a double length through said support,
strip between the head and the second strip, then
the two lengths respectively around said mem
radially inward into said support, and its end
projecting from one end of said support for
access to pull one end of the metallic strip, where
by the second strip can be‘ adjusted about said
bers and outwardly through said slots, andthen
around said head, and said strip moved length
part of said support positioned exteriorly of the
cluding complemental cams adjust'ab'le'inv oppo
wise from a point exterio-rly of said support to
feed the strip around said head; and a pair of
head
‘
reels at one end ofsaid support and about which
4. A honing tool comprising: a support; a strip 10 the ends of the strip are adapted to be wound,
of abrasive material; means on said support for
so that by rotation of ‘one of said reels the strip
holding a part'of said strip in spiral :form within
can be moved as aforesaid.
Y
a tubular piece of work to have honing engage
8. A honing tool, comprising: a tubular support
ment therewith when the two are rotated rela~
having a slot in the wall thereof; a head around
tively; and means carried by said support and 15 said support and having a slot registering with
axially removed from said ?rst-mentioned means
the slot of said head; guide members in said sup
for adjusting said strip lengthwise of said support
port adjacent the slot therein and arranged one
and in relation to said head to present to the lat
in advance of the other along said support and
ter a new part of said strip in spiral form to dis
at angles to the axis of ‘said support so that a
place the other part strip when it loses its abra 20 strip of abrasive material can be extended through
sive property.
_
said support in a double length with each length
5. A honing device, comprising: a support
about one of said members, and then outwardly
adapted at one end to be extended into a piece
through said slots and around said head in a
of work to be honed; a head on‘ said end about
spiral form; and means operable from a point
which the intermediate portion of a strip of flex 25 exteriorly of said support for moving the strip
ible abrasive material is adapted to be wrapped
lengthwise to- feed the later around said head.
to have-honing contact with the interior of the
9. In a honing device: a support; a supply'of a
work, extended inwardly of said head and said
strip of abrasive material in ‘said support and
support, and then outwardly from said support
looped about said head;" and means on said
and the work; and means associated with that 30 support for adjustably'expan'ding said head, in-__
work and actually removed from said head for
site directions axially of said head.“
' ‘ '
feeding said strip through said support and around
- 10. In a honing device: a'support; a head on
said head to present as required unused parts of
said support, a supply of a strip of abrasive mate
said strip to said head during the honing opera
rial in said support and looped about said head;
tion.
means on said support for adjustably expanding
6. A honing tool, comprising: a tubular sup
said head, including complemental cams adjust
port having a slot in the wall thereof; a head
able in opposite directions axially of said head;
around said support and having a slot registering
and rotary means on said support for simultane
with the slot of said head; guide members in said 40
ously
11. adjusting
A honing tool'comprising
said cams.
a' tubular' support
i "
support at opposite sides of the slot therein and
arranged at such an angle to the axis of said
having an opening therein; an expansible head
support that a strip of abrasive material can be
on‘ said support positioned in relation to said open
extended in a double length through said sup
ing so that a strip of ?exible and abrasive ma
port, the two lengths respectively around said
terial can be extended from said opening and
members and outwardly through said slots, and
around said head; elements movable on said sup?
then around said head, and said strip moved
port within said head; cam surfaces on said head
lengthwise from a point exteriorly of said sup
and said elements coacting when said elements
port to feed the strip around said head; and means
are moved in opposite directions axially,’ of said
operable from a point exteriorly of said support 60 head, to expand said head; and companion mem
for moving the strip as aforesaid.
bers positioned in said support so that the strip
'7. A-honing tool, comprising: a tubular sup
of material can in a double length be extended
port having a slot in the wall thereof; a head
inwardly from said opening and‘longitudinally
around said support and having a slot registering
within said support to a point exteriorly of one
with. the slot of said head; guide members in said 55 end of the latter.
‘
support at opposite sides of the slot therein and
GAYLORD E. STRAHM.
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