close

Вход

Забыли?

вход по аккаунту

?

Патент USA US2125005

код для вставки
«my 26, 1938»
' F. c. JEARUM
’
` ¿$25,010
ADJUSTABLEVTURNING AND BORING Toor.
Filed Juïy 11, 1936
l 11.3.10. 5` es”F.äzïwvewñoz»
C.' Jfàmeu/vl
7
.
‘
m1411635
Patented July 26, 1938
7 ,natos
UNITED STAT-Es
,
,
¿PANT
erica `
2.125,0@5
ADJUSTABLE TURNING AND _BORING T061.
Frederick Charles Jeamm, Chipstead, England
Application July 1l., 1936, Serial No. 90,051'
y
i
'In Great Britain August 17,1935'
'J
1e claims. (El. Ztl-_96)
This invention relates to Aadjustable turning
and boring tools and, more particularly, to turn
ing and boring tools having cutting bits adjust
able along and relative to a supporting shank
5 adapted to be clamped .in tool holders, boring
bars and the like. It is a. drawback in the cus-4
tomary method of using turning and boring tools
having super-hard tips of diamond or tungsten
carbide type- that in the first place the tip is
l0 liable to be `lamaged in the adjusting operations,
usually performed by tapping backward' or for
ward, and in the second place that the hap
hazard result of adjustments so performed tends
to vitiate the accuracy of cutting of which such
used. A nose, 2, carrying an inserted, Superf
hard tip, 3, is slidable within the shell,»f l, and
is furnished at its inner end with a tapped shank,
' 4, which engages with a threaded bolt, t, having
a transverse keyway, t, at its rear end, the
screwed portions being preferably left handed.
The adjusting head, l, has a spigot, t, by which
` the head, l, is centered in the shell, i, and has
a transverse key, il, protruding through the in
ternal collar, iü, of the shell, l, and engaging
with the said keyway, t. 'A screw, il, clamps the
head, 7, to the bolt, 5, thereby retaining the key,
9, in engagement with the keyway, 6, and pre
serving the bolt; 5, in constant/ axial relation
15 tools are capable. It is the purpose, therefore, to the internal collar, i il, and thus to the shell, l..
of the constructions exemplifying the present 1n
The head, î, is provided, as shown in Figure 2,
vention, to eliminate doubt as to the degree vof ' with a hexagonal recess, I2, by which it may, be
adjustment performed by employing positive rotated with the employment of a hexagonal key
. and graduated adjusting means for effecting and of well-known type, and the degree of adjust
2o controlling the setting of the tool’to the work. ment may he read by noting the relation of 20
Accordingly, the invention provides an adjust
the graduations, i3, on the head, "l, to the read
able tool-bit of the kind described above having er mark, iii, on the adjacent part of the shell, i.
a member bearing a cutting tip of the type re
in order to prevent the nose, 2, with its shank,
ferred to, a body member whereby the bit may ' li, from rotating with respect to the shell, i, a ' `
25. be clamped in an operating position and definite
sprung key, i5, is contained in a pocket, it, in 25 '
ly progressive adjusting means for adjusting the the shank, 2l, the key, it, being furnished with
position of said cutting-tip bearing member with a feather il, across its outer end, the said feath
respect to said body member substantially in the er, Il, engaging with one of >three longitudinal
direction of the depth of cut.
slots, it, formed in the shell, i, a spring le, con
in order to illustrate the nature of the means tained in the pocket, it, serving to maintain the 30
provided in accordance with the invention, em
feather, il, in engagement with the said slot,
It. This arrangement admits of the tool bit be-l
bodiments are herein described with; reference
to ‘the drawing which accompanies this specifica
ing readily'taken apart when the key, i5, is
pressed into its pocket, it, sufficiently to disen»
tion, and wherein,
'
Fig. l is a longitudinal elevation of an ad- _ gage its feather, il, from the slot, i8.
¿instable tool `bit intended for use in` a boring
The slots, lil, in the shell, i, Figure 1,> also
bar and provided with means for giving adjust» allow a slight contraction of the shell onto the
shank, d, under pressure of the clamping means
mentV
Fig. by
2 isrotating
a rear end
a graduated
elevation thereof,
head,
of the toolholder, thereby providing for the
Fig. 3 is a view similar to Fig'. l but showing greater stability of the shank, 4, and the nose, 2,
40 a portion of the tool in longitudinal section,
in which the cutting tip, 3, is mounted.
Fig. 4 is a view in elevation and longitudinal
In Figure 4, is shown a simplified form- which
section of a simpliñed form of the invention,
is adequate for some purposes. Here the vcutter
Fig. 5 is a longitudinal horizontal section of head, 2l) has its shank, 2i, threaded immediately
a modified tool provided with a differential ad
behind its shoulder and a graduated» ring, 22, is 45
justing means by which a much finer degree tapped to fit the shank, 2|. The rear end of the
of adjustment is made possible,
shank, 2l, is tapped for a shouldered screw, 23, '
Fig. 6 is a longitudinal vertical sectional view which passes through a collar, >24, inside the shell,
of the A«tool shown in Fig. 5,
26. Between the head of vthe screw, >23, and the
Ng. 7 is a longitudinal vertical section of a saidcollar, 24, is aspring, 26, tending to with
«lili
tool constructed to provide for both >coarse and draw the shank, 2l, into the shell, 25. The ex
iine adjustments independently.
tent to which this is permitted is> determined by
Fig. 8 is a longitudinal elevation .cfa key for ' the adjustment of the ring, 22, as it bears against
adjusting the tool shownl in Fig. 7, and
the forward end of the shell, 25. The shell, 25,
Figs. 9 and 10 are respectively longitudinal is slit longitudinally as in the former case and
55
horizontal and vertical sections of a modification
a spring key, til, prevents the shank, 2l, from
of the construction shownin Fig. 7. >
rotation in the shell, 25.1
In Figures 1, 2, and 3, a shell, I, is adapted
_ to be clamped in holding means in the toolholder
w or boring bar in which the tool is required to be
f
In Figures 5 and 6, a modiiied construction is
shown. In this; the shell, nose and shank, are
indicated by 2l, 28, and 29, respectively; but, 60
2
2,125,005
.
here, the bolt, 36, which is tapped/into the shank, tongue, 3,3, the free end of which, was a portion '
29, with a thread of a particular pitch, is con
strained axially or the shell by having its head,
3l, threaded with a somewhat finer pitch and
engaging with a similar thread tapped'into a
portion, 32, of the shell, 2l, itself.
o! the collar, 58. The exterioror this tongue,
83, is somewhat tapered inwards to its free end,
as shown by the line, 60, vand the inner portion o!
its tree end is relieved so that a ball, 3l, having a
' diameter equal to the widthof the tongue, may be
bolt, $0, is also slotted `as shown at, 33, to em~
retained in one of the pits, 6,2, in the sleeve, 31, by
the said tongue. With this construction the key,
brace` a. Sat stem, 36, which is furnished with a _
61, does not require to be ñtted with the former
In this case, both screws are left handed.
The
10 transverse keyway, 35, in a manner similar to
sliding graduated collar,l as the head, 56, is made 10
that of the bolt, 5, of Figure 1, the keyway, 35,. to’ serve for measuring either the coarse or the
-'
engaging with "a key, t6, formed on the spigot, ?ne adjustment.
3l, ci the adjusting head, 3d. A screw, 39,
In 4this case, a blade member, 65, is recessed
' clamps the head, 38, to the stem, til, and retains . at its rearward end, 56, into >the head, 56, so as'
both in the shell, 2l, as in the former case.
-
supposing that the shank, 29, and the bolt, 30,
have e. thread of slightly coarser pitch than that
on the head, Si, and in the portion, 32, of the
- shell, 2l, then the rotation of the bolt, 30, by the
20 stem, 3d, will move the shank, 29, in one turn, a
distance corresponding to the diderence between
the pitches ci’ the respective threads. Thus, in
as
to >turn therewith, and permanently engages the 16
slot in the bolt, 64, passing freely throughthe
hexagonal hole in the sleeve, |51.
The thickness of the blade is such -that the
operating key, 6l, when slotted as shown, may be
inserted through the head, i8, and engages the 20
hexagonal hole, 85, in the sleeve, 51, thus being
enabled to turn the head, the sleeve, and the
a particular case, if the bolt threads are 46 per bolt, as a solid, to give the coarser adjustment.
inch, and those on the head of the bolt 50 per When the key, 61, is inserted, to engage the head,
inch, one turn or the bolt will move the shank . 56, only, and not the sleeve, the latter' is retained 25
V40-%0=V;00 oi an inch. If, now, the head, 38, stationary by the ball, 6I, and the rotation of
be graduated with 50 divisions, each divisionY will
the head, y56, with the blade, 6E, effects the liner
represent a movement di the shank, 29,; oi
adjustment.
‘domo of an inch.
80
In this construction also, a sprung key, $6, pre--l
vents rotation of the shank, £9, inthe shell, 2l.
‘
_
It will be seen that when the tool is used ln a
boring`*bar, the importance of «the `entire con
struction being kept within the normal diameter
Figure ‘7 illustrates a construction similar to , lof the tool blt is considerable, as is also the
that shown in Figures 5 and 6, but in which the
coarser screw can be'employed independently to
35
give preliminary settings upon which tine adjust
Y ments may be superimposed subsequently.
Forthis purpose, the b'olt, 4i, is or' uniform
transfer of the clamping pressure to the shank
itself, whereby the nose leaving the cutting tip,
'is prevented from loss of rigidity.
y What I claim is:
diameter, screwed with the coarser thread for
1. A tool or the class described, comprising a
tubular shell, a tool holding head projecting from
halt its length and the finer for the remainder.
the forward end of the shell and having' a shank
The finer thread engages with a. tapped hole in a
extending axially into such end and supported on 40
sleeve, 42‘, of substantially the same outside the inner wall of the shell, and screw threaded
diameter as the shank“, @3. This sleeve, 42, iso „ means located axially o! and within the shell
retained axially by an internal collar, dll, in the and cooperating with the shell and the rear end
' shellylä, and has a spigot, ‘inpassing through, of the shank to> hold the shank and the head
45 this collar, upon which is used the adjusting against axial,y movement forwardly and rearwardly 45
head, 4l. The spigot, QE, has an axial hole, d8, 'and including a rotary member for adjusting the
and the bolt, di, has a long slot, di); ' An operate" ' shank and head axially of the shell, and means
ing key 5t (Fig. 8) is formed partly as a hat blade at the rear end of the shell having a key and slot `
5I and partly as e hexagonal body 52.
rotating connection with the member, the shank
The key-body, 52, has, slidably mounted upon ¿continuously fitting the inner wall ci the shell 50
it, a collar, 53, lightly sprung to bear against the from a point closely adjacent to the head to a.
head, 47, when the key is inserted into the latter. point remote therefrom whereby securely to sup
When the key' is fully inserted, the> blade, 5I, port the head in retracted and extended positions.
engages the slot, te, in the bolt, 4i, and the body,
2. A tool oi’ the class described, comprising a
55 S2, engages the head, 4l. Now, if the key is tubular shell, a tool'holding head projecting from 55
turned, the head, tl, the sleeve, d2, and the bolt, the forward end of the shell and having a cylin
4|, all turn as a solid and the adjustment or the drical shank extending axially into such end and
shank, 43, will be by the ccarser screw, only.. fitting the inner wall of the shell from said for
Should the key be allowed to emerge somewhat, ward end rearwardly, screw threaded means
so that the body, 52, is clear of the head, 61, and within the shell and in threaded engagement 60
50
the collar, 53, still bears ,against the head, Il.
operation ofthe key causes the bolt, Sl, only,-to
., rotate and the adjustment will be made as in
the construction shown in Figures e, 5, and 6, the
65 degree of` adjustment being indicated by `the
graduations, 54, on the collar, 53, and the reader
. mark, 55, on the head, 4l. '
-
with the rear end of the shank, calibrated means
at the rear end of the shell for rotating the
screw threaded means and adjusting the head
longitudinally a predetermined amount, and
means connecting the calibrated means to the 65
screw threaded means whereby rotation oi' the
former rotates the latter and whereby the latter
rn a further modmcauon shownin Figures e .Vis held against .longitudinal movement.
and 10, the head, 56, is so fitted to the sleeve,3. A, tool of the class described, comprising a
51, as to be fr_ee to rotate thereon,- although con
tubular shell,- a tool holding head projecting 70
strained axially by the split ring 32, in -well
from the forward end o1' the shell and having a
known manner. The sleeve, 51', is formed, within cylindrical shank extending axially into such end
the collar, 58, in the shell, 59A, with a number of and ñtting the inner wall of the shell from said
forward end rearwardly, and a screw threaded
recesses or pits, B2, and the shell, 59, is slit longi
75 tudinally for some distance, -so as to’ leave _aA , member located axially of andwlthin the shell,
9,125,005
said member having threads of different charac
ter cooperating respectively with the shelland the
rear end of the shank.
„
4. 'I'he tool deñned in claim Á3 in which said
threads are of dillerent pitch and in threaded
ing a rotary member for adjusting the shank
and head axially of the shell.
~ 10. The tool defined in claim 9 in which the
shell is laterally 'compressible into binding en
gagement with the shank.
engagement respectivelywith the shell and the
rear end of the shank.
l
5. A tool of the class described, comprising a
tubular shell havingv a cylindrical bore therein,
a tool holding head projecting from _the forward
-end of the shell and having a cylindrical> shank
siidably ñtting the -cylindrical wall of the bore
from the forward end of the shell rearwardly, a
i
5
Yll. '_I‘he tool deñned in claim 9 in _which the
shank is prevented -from rotation within the
shell by a key within the shank spring-pressed
outwardly into a> slot> extending longitudinally of
and through the shell.
10
12.`A tool ofthe class described, comprising
a tubular shell having a bore therethrough cylin
drical at and rearwardly of its forward end. a
screw in the shell having two threaded portions . tool holding head projecting from the forward4
l15 respectively oi relatively coarse and iìne pitch
and respectively in threaded engagement with the
»‘ rear end of thé shank and the shell, and means
‘ including a rotary member at the rear end o! the
shell so connected tov thev screw as to cause the
20 vscrew to rotate with the member.
end' of the bore and having a` supporting shank
cylindrical therealong to a point closely adje.m
cent to said head and slidably ñttlng within the
bore, and screw threaded means located axially
of the shell and cooperating with the shank and
shell to hold the shank and* head lagainst axial 20
‘ with the »screw and preventing their relative ro
movement rearwardly and including a rotary
member for adjusting the shank and head ax
ially of the shell, the shell being slotted longi
tation but permitting relative'movement longi
tudinally whereby rendering it compressible into
6. The tool deiined in claim 5 in which said
means includes a member having engagement
25 tudinally of the shell, and means holding the ?rst
and second named members from separating
movement longitudinallyì of the shell.
_
7. A tool of the class described, comprising a
tubular shell having a longitudinal bore there
through, a tool. holding head projecting from the
"so forward
end of the shell and having a shank ex--_
tending into the bore and supported -for longi
tudinal movement on the wall thereoi, a sleeve
in the shell rearwardly of and in alignment with
the shank, a screw in the shell having two
threaded portions respectively of relatively coarse
and fine `pitch and respectively> in threaded en
gagement with the rear end of the shank and the
sleeve, and means preventing axial movement ofI
the sleeve, the sleeve and screw being rotatable
as a- unlt and the screw being rotatable inde
pendently of the sleeve.
'
-
.
-
8. A tool of the class described, comprising a
l tubular shell having a longitudinal _bore there->
through, a tool holding head projecting from
the forward end o! the shell and having a shank
extending into the bore and supported for longi
binding engagement with the shank.
25
13. A‘tool of the class described, comprising a
tubular shell having‘a longitudinal bore therein
of greater diameter than the thickness of the
shell wall and cylindrical from the forward end
of the shell rearwardly, a tool holding head of ‘a 30
radial size substantially corresponding with the
shell and having a reducedI cylindrical shank
extending axially into the forward end of the
bore vand supported on the wall thereof from
the forward end of the shell rearwardly, and 35
screw threaded means located axially of and
within the shell and cooperating with the shank
and shell to adjust the shank and head to differ
ent axial positions andhold them in such posi
tions relative to the shell, the cylindrical shank 40
being constructed continuously to nt the walls of
_the bore from a point closely adjacent to the
head to a point remote therefrom whereby se
curely to support the head in retracted and
extended positions.
.
--14. The tool defined in claim 13 plus cali
brated means at the rear end of the shell and of
tudinal movement on the wall thereof, a sleeve a radial size substantially corresponding with
in the shell rearwardly of and in alignment withv ' the shell for rotating the screw threaded means
the shank, a screw in l the shell having two
threaded portions respectively of relatively coarse
and iìne pitch and respectively in threaded en
Easement with the rear end of the shank and the
' sleeve, means preventing axial movement of the
sleeve,` means for rotating the sleeve andf- screw
as a unit or _rotating A_the screw independently ofï
the sleeve, and nieans for indicating the degree
o! tool head adjustment eilected by such rotation.
v9. A tool oi' the class described. comprising an
elongated shell having a longitudinal borethere
in cylindrical from _the forward'end of the shell
and indicating the resulting adjustment of the 50
head.
'
15. A tool of the class described, comprising
a tubular shell having a cylindrical bore therein,
a tool holding head projecting from the forward
end of the shell and having a cylindrical shank
slidably fitting the wall of the bore from the
forward end of the shell rearwardly, a screw in
threaded engagement with the rear end of the
shank, a shoulder integral with the shell and
preventing rearward movement of the screw in 60
the bore, and means including a rotary member .
at and engaging ’the rear end of the shell and so
rearwardly, a tool holding head projecting from
connected to' the screw as to prevent forward
the _forward end of the bore and havingY a suD
thereof and .cause the screw to rotate
porting shank cylindrical therealong rearwarmy >movement.
with the member.
from a point closely adjacent to said head and
16. The tool deñned in claim 15 in which said
means includes co-engaging transverse shoulders
threaded
sudsbiy means
stung' .coaxial
withinAofthe
the bore.
central longitudi
nal axis of the shelland cooperatingl with the
‘n shank and shell to hold thevshank and head
against axiall movement
includ
i .
ì
- between» the screw and member, and means hold-‘l
ing the member and shell from separating move-A
ment
-
longitudinally.
Y
_
‘
.
.
FREDERICK CHARLES J‘EARUM.
70
Документ
Категория
Без категории
Просмотров
0
Размер файла
679 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа