U.S. patent application number 10/526874 was filed with the patent office on 2006-05-04 for mist supply mechanism for rotary tool.
This patent application is currently assigned to Kanefusa Kabushiki Kaisha. Invention is credited to Tsuyoshi Ide.
Application Number | 20060094344 10/526874 |
Document ID | / |
Family ID | 31973093 |
Filed Date | 2006-05-04 |
United States Patent
Application |
20060094344 |
Kind Code |
A1 |
Ide; Tsuyoshi |
May 4, 2006 |
Mist supply mechanism for rotary tool
Abstract
There is provided means which is designed to smoothly supply
mist to a rotary tool in rotation without involving a rotary shaft
to which a rotary tool is attached so as to easily add the
cooling/lubricating mechanism to an already installed machining
device and to achieve free selection/use of a rotary tool from
various commercially available rotary tools having an inside
diameter not coincident with the outside diameter of the rotating
shaft. A mist supply mechanism for supplying mist under pressure to
a rotary tool 18 provided at a rotating shaft 10, and implementing
cooling and/or lubricating of the rotary tool 18 during
workpiece-machining is configured so that the rotary tool 10 is
provided at a sleeve 16 of a necessary length circumferentially
engaging with the rotating shaft 10; a plurality of mist supply
passages 38 extending in the axial direction are provided in the
sleeve 16; and the mist is supplied to the rotary tool 18 through
the mist supply passage 38.
Inventors: |
Ide; Tsuyoshi; (Niwa-gun,
JP) |
Correspondence
Address: |
KODA & ANDROLIA
2029 CENTURY PARK EAST
SUITE 1140
LOS ANGELES
CA
90067
US
|
Assignee: |
Kanefusa Kabushiki Kaisha
|
Family ID: |
31973093 |
Appl. No.: |
10/526874 |
Filed: |
May 26, 2003 |
PCT Filed: |
May 26, 2003 |
PCT NO: |
PCT/JP03/06553 |
371 Date: |
March 4, 2005 |
Current U.S.
Class: |
451/449 |
Current CPC
Class: |
B23D 59/025 20130101;
B23Q 11/103 20130101 |
Class at
Publication: |
451/449 |
International
Class: |
B24B 55/02 20060101
B24B055/02 |
Foreign Application Data
Date |
Code |
Application Number |
Sep 5, 2002 |
JP |
2002-260352 |
Claims
1. A mist supply mechanism for a rotary tool for supplying a mist
under pressure to a rotary tool (18) disposed around a rotating
shaft (10), and implementing cooling and/or lubricating of the
rotary tool (18) during workpiece-machining, wherein rotary tool
(18) is disposed around a sleeve (16) with a required length
circumferentially engaging the rotating shaft (10); a plurality of
mist supply passages (38) are provided which consist of long groove
sections concaved on the outer surface of the sleeve (16) and
extending in the axial direction; and the mist is supplied to the
rotary tool (18) through the mist supply passage (38).
2. A mist supply mechanism for a rotary tool for supplying a mist
under pressure to a rotary tool (18) disposed around a rotating
shaft (10), and implementing cooling and/or lubricating of the
rotary tool (18) during workpiece-machining, wherein the rotary
tool (18) is disposed around a sleeve (16) with a required length
circumferentially engaging the rotating shaft (10); a plurality of
mist supply passages (38) are provided which consist of long groove
sections concaved on the inner surface of the sleeve (16) and
extending in the axial direction; and the mist is supplied to the
rotary tool (18) through the mist supply passage (38).
3. A mist supply mechanism for a rotary tool for supplying a mist
under pressure to a rotary tool (18) disposed around a rotating
shaft (10), and implementing cooling and/or lubricating of the
rotary tool (18) during workpiece-machining, wherein the rotary
tool (18) is disposed around a sleeve (16) with a required length
circumferentially engaging the rotating shaft (10); a plurality of
mist supply passages (38) are provided which are tubular passages
perforated at the cylindrical thick section of the sleeve (16) and
extending in the axial direction and have one end communicating
with a mist supply source and the other end being closed as a
closed-end section; each one end of a plurality of passage ports
(40) axially perforated at the cylindrical thick section
correspondingly communicates with the mist supply passage (38); and
the mist is supplied to the rotary tool (18) through the mist
supply passage (38).
4. (canceled)
5. (canceled)
Description
FIELD OF THE INVENTION
[0001] The present invention relates to a mist supply mechanism for
a rotary tool and, more particularly, to a mist supply mechanism
configured to supply a mist under pressure to a rotary tool
provided at rotating shaft such as a circular saw, so as to allow
cooling and/or lubricating of the rotary tool during
workpiece-machining.
PRIOR ART
[0002] A rotary tool represented by for example a circular saw is
attached to the main shaft of a machining device such as a circular
sawing machine, etc., to be used under high-speed rotation. This
rotary tool has a problem of decreasing the durability of the
rotary tool due to the heat generated from the friction occurred,
during the machining of various workpieces, between the tool and
the workpieces. In addition, the problems are also pointed out that
a finish of the machined surface in the workpiece is deteriorated;
further, it requires a long time for machining; and a noise is
increased.
[0003] As a means for preventing or controlling the heating of the
rotary tool leading to high temperature in such manner during
workpiece-machining, it is widely known to implement cooling and
lubricating together by successively supply cutting oil to an area
to be machined during the machining of metal, stone, or the like.
For example, a machining device is known wherein a machining
passage 29 extending in the central axial direction thereof is
perforated in a rotating shaft 11 with a metal saw 19 attached; a
machining fluid is introduced to the machining passage 29 from an
external machining fluid supply source 27 through an annular
machining-fluid passage 25 and a plurality of communication
passages 31; and the machining fluid is gushed from a machining
fluid jet 33 perforated on the machining passage 29 and opened on a
base of each metal saw 19, so that cooling and lubricating of the
metal saw 19 are implemented (see Japanese Unexamined Patent
Publication No. 2001-334408, page 1, FIGS. 1 and 2 . . .
hereinafter, referred to as "Patent Reference 1.")
PROBLEM TO BE SOLVED BY THE INVENTION
[0004] The aforementioned technique of supplying machining oil to
an area to be machined on a workpiece causes no problem in a case
where the workpiece is metal or stone. However, in a case where the
workpiece is made of relatively soft material such as wood, there
exist problems in that oil spreads thereto, which is troublesome,
due to the supply of coolant oil, and it cannot be helped to avoid
employing it since it also becomes the cause of pollution. Thus, by
forcibly transferring machining oil with pressure air to form fine
mist, and the mist is supplied to the metal base section of a
circular saw during machining of wood, thereby allowing cooling and
lubricating of the metal base section with less amount of mist to
be used, so that the aforementioned disadvantage over the workpiece
of wood can also be effectively controlled.
[0005] It seems that as a mechanism for supplying the mist to a
rotary tool such as a circular saw etc., based on the structure
described in the aforementioned Patent Reference 1, a small
modification is given to achieve sufficient utility. However, the
machining device disclosed in Patent Reference 1 is designed to
perforate a passage port at the center of the rotating shaft
extended in the axial direction, and to make this passage port to
function as a main supply passage for coolant oil. Thus, in the
aforementioned structure wherein a supply passage is perforated for
cooling/lubricating medium in the rotating shaft in the machining
device, when providing cooling/lubricating function for a rotating
shaft in a machining device in operation already installed in a
plant etc., not in a newly manufactured machining device, the
replacement of this rotating shaft must be initiated first, which
constitutes a drawback of installing cost increase. In addition,
even in a machining device with a rotating shaft to which a supply
passage for cooling/lubricating medium is attached, a drawback is
also pointed out that, when the inside diameter of the rotary tool
to be mounted on the machining device is not coincident with the
outside diameter of the rotating shaft, it becomes impossible to
mount the rotary tool thereon, so that many of various commercially
available rotary tools cannot be used.
OBJECTS OF THE INVENTION
[0006] The present invention is proposed in order to suitably solve
the aforementioned drawbacks which exists in a cooling/lubricating
mechanism of the conventional rotary tools, and aims to provide
means which is designed to smoothly supply mist to a rotary tool in
rotation, without involving a rotary shaft to which the rotary tool
is attached, so as to easily add the cooling/lubricating mechanism
to an already installed machining device and to achieve free
selection/use of a rotary tool from various commercially available
rotary tools having an inside diameter not coincident with the
outside diameter of the rotating shaft.
MEANS FOR SOLVING THE PROBLEMS
[0007] In order to overcome the above problems and achieve the
anticipated object, the present invention comprises a mist supply
mechanism for a rotary tool for supplying a mist under pressure to
a rotary tool (18) disposed around a rotating shaft (10), and
implementing cooling and/or lubricating of the rotary tool (18)
during workpiece-machining, wherein
[0008] the rotary tool (18) is disposed around a sleeve (16) with a
required length circumferentially engaging the rotating shaft
(10);
[0009] a plurality of mist supply passages (38)are provided which
consist of long groove sections concaved on the outer surface of
the sleeve (16) and extending in the axial direction; and
[0010] the mist is supplied to the rotary tool (18) through the
mist supply passage (38).
[0011] In order to overcome the above problems and suitably achieve
the anticipated object, the other invention of this application
comprises
[0012] a mist supply mechanism for a rotary tool for supplying a
mist under pressure to a rotary tool (18) disposed around a
rotating shaft (10), and implementing cooling and/or lubricating of
the rotary tool (18) during workpiece-machining, wherein
[0013] the rotary tool (18) is disposed around a sleeve (16) with a
required length circumferentially engaging the rotating shaft
(10);
[0014] a plurality of mist supply passages (38) are provided which
consist of long groove sections concaved on the inner surface of
the sleeve (16) and extending in the axial direction; and
[0015] the mist is supplied to the rotary tool (18) through the
mist supply passage (38).
[0016] In order to overcome the above problems and suitably achieve
the anticipated object, the another invention of this application
comprises
[0017] a mist supply mechanism for a rotary tool for supplying a
mist under pressure to a rotary tool (18) disposed around a
rotating shaft (10), and implementing cooling and/or lubricating of
the rotary tool (18) during workpiece-machining, wherein
[0018] the rotary tool (18) is disposed around a sleeve (16) with a
required length circumferentially engaging the rotating shaft
(10);
[0019] a plurality of mist supply passages (38) are provided which
are tubular passages perforated at the cylindrical thick section of
the sleeve (16) and extending in the axial direction, and have one
end communicating with a mist supply source and the other end being
closed as a closed-end section;
[0020] each one end of a plurality of passage ports (40) axially
perforated at the cylindrical thick section correspondingly
communicates with the mist supply passage (38); and
[0021] the mist is supplied to the rotary tool (18) through the
mist supply passage (38).
BRIEF DESCRIPTION OF THE DRAWINGS
[0022] FIG. 1 is a longitudinal cross section of a mist supply
mechanism for a rotary tool according to the preferred embodiment
of the invention.
[0023] FIG. 2 is an enlarged cross section of a rotary seal section
in the mechanism shown in FIG. 1.
[0024] FIG. 3 is a transverse cross section taken along the line
III-III of FIG. 2.
[0025] FIG. 4 is a longitudinal cross section of the rotary seal
section shown in FIG. 2 with a sleeve and a rotating shaft being
removed.
[0026] FIG. 5 is a transverse cross section taken along the line
V-V of FIG. 4.
[0027] FIG. 6 is an enlarged perspective view of a main part of the
mist supply mechanism according to the embodiment with a part being
notched.
[0028] FIG. 7 is an enlarged view of a part surrounded by a
dash-single-dot line of FIG. 1.
[0029] FIG. 8 is a longitudinal cross section of a mist supply
mechanism according to another embodiment of the invention.
[0030] FIG. 9 is a longitudinal cross section of a mist supply
mechanism according to yet another embodiment of the invention.
EMBODIMENT OF THE INVENTION
[0031] Next, a mist supply mechanism for a rotary tool of the
invention is described hereinbelow referring to attached drawings
and illustrating the preferred embodiment. Although the present
embodiment illustrates a gang saw mainly for cutting wood wherein a
multiplicity of circular saws are disposed in the axial direction
of a rotating shaft at required intervals, it is as a matter of
course not limited to this embodiment.
[0032] FIG. 1 is a longitudinal cross section of a mist supply
mechanism according to the preferred embodiment of the invention;
FIG. 2 is an enlarged cross section of a rotary seal section in the
mechanism shown in FIG. 1; and FIG. 3 is a transverse cross section
taken along the line III-III of FIG. 2. Further, FIG. 4 is a
longitudinal cross section of the rotary seal section shown in FIG.
2 with a sleeve and a rotating shaft being removed; and FIG. 5 is a
transverse cross section taken along the line V-V of FIG. 4.
Regarding a Sleeve
[0033] In FIG. 1, symbol 10 denotes a rotating shaft extending
horizontally, rotatably supported by a circular sawing machine not
shown diagrammatically, wherein a bolt section 12 with its diameter
being reduced is integrally provided with an open end (on the right
side in the drawing) of the rotating shaft 10, and a nut 14 is
designed to be screwed into the bolt section 12. A sleeve 16 having
a required length circumferentially engages with the rotating shaft
10 in such a manner that the inside diameter of the sleeve 16 is
approximately coincident with the outside diameter of the rotating
shaft 10 in a close contact state to extend in the axial
direction.
[0034] The sleeve 16 is configured as a hollow metal body in a
cylindrical shape having a required thickness, and one end (on the
left side in FIG. 1) of the sleeve 16 is integrally formed with a
flange 16a with a required diameter. When the sleeve 16
circumferentially engages with the rotating shaft 10, the flange
16a abuts an enlarged step 10a of the rotating shaft 10 to be
positioned to the left side. Further, the right open end of the
sleeve 16 is positioned to the right side by the tightening of the
nut 14 screwed into the bolt section 12. Thus, the rotating shaft
10 and the sleeve 16 can be integrally rotated by the drive of a
rotary driving source not shown.
[0035] In FIG. 1, a required number of circular saws 18 and
ring-like spacers 20 having required thickness are disposed
alternately around the outer circumference of the sleeve 16, and
the spacer 20 located at the most right side is positioned in the
axial direction by a rotary seal section 22 engaging
circumferentially and rotatably with the sleeve 16. The rotary seal
section 22 is, as described later with reference to FIGS. 2 and 4,
basically configured from an inner rotary tubular body 24 and an
outer fixed tubular body 26. The right side of the inner fixed
tubular body 24 is tightened by a ring-like nut 28 screwed into a
male screw 16b threaded on the right side of the outer
circumference of the sleeve 16 through a ring-like spacer 27, so
that the inner fixed tubular body 24 is positioned to the axial
direction. Further, symbol 30 in FIG. 1 indicates a key disposed on
the outer circumference of and along the longitudinal direction of
the sleeve 16, and the key 30 allows the prevention of the rotation
of the circular saws 18 and the spacers 20 in the radial
direction.
[0036] As shown in FIGS. 1, 2 and 6, at the area on the
circumferential surface of the sleeve 16 and with which the rotary
seal section 22 circumferentially engages in a corresponding
manner, an outer circular groove 32 set to have a required width
and depth are formed; and at the area on the inner circumference of
the sleeve 16 and which corresponds to the outer circular groove
32, an inner circular groove 34 set to have a required width and
depth is formed likewise. Further, as proved from FIGS. 2 and 3,
four passage ports 36 in total for providing communication between
the outer circular groove 32 and the inner circular groove 34 are
perforated through the sleeve 16 at the center angle of 90.degree..
The passage port 36 is for supplying a mist coming from the rotary
seal section 22 to a long groove 38 (described later) formed on the
inner circumference of the sleeve 16, and the number of the
perforation is not limited to four, as a matter of course.
[0037] As shown in FIGS. 6 and 3, on the inner circumference of the
sleeve 16, four (in the illustrated drawings) long grooves 38 are
formed and extending in the axial direction. That is, one end of
the long groove 38 faces and provides communication with an area on
the inner circular groove 34 and corresponding to an area to which
the passage port 36 is perforated, and the other end, as shown in
FIG. 1, terminates at an area positioned a little inside from the
left end of the hollow section in the sleeve 16. Further, as shown
in FIG. 3, four long grooves 38 in total are provided at the center
angle of 90.degree., and the starting end thereof communicates in
an open manner with the inner circular groove 34.
[0038] Moreover, on a position where the circular saws 18 and the
spacers 20 are circumferentially engaged with the sleeve 16, mist
supply ports 40 with a small diameter for providing communication
between the circumferential surface of the sleeve 16 and the long
groove 38 are perforated radially at predetermined intervals (see
FIG. 1). The mist supply port 40 is designed, as shown in FIG. 7,
to open to an area where the spacer is disposed. In addition, on
the spacer 20, there is formed e.g., in a U-shaped or an L-shaped
manner a mist circulation groove 20a for allowing a mist coming
from the mist supply port 40 to flow to the side of the circular
saw 18. Further, it is unnecessary to provide the mist circulation
groove 20a for the spacer 20 not in contact with the circular saw
18.
Regarding Rotary Seal Section
[0039] The rotary seal section 22 fulfills a function of supplying
a mist supplied by pressure from an external mist supply source not
shown through a pipe to a metal base section of the circular saw 18
through a sleeve 16 rotating at high speed together with the
rotating shaft 10. That is, the rotary seal section 22 is, as shown
in FIGS. 2, 4 and 6, basically configured from an inner rotary
tubular body 24 with a flange 42 provided at one end and a
ring-like lid 43 adhered to the other end, and an outer fixed
tubular body 26 circumferentially engaged on the outer
circumference of the inner rotary tubular body 24 through a
circular bearing 44. The outer fixed tubular body 26 is attached to
an outside fixing area by means not shown, so as to be unrotatable.
Accordingly, the inner rotary tubular body 24 is designed to be
freely rotatable with respect to the outer fixed tubular body 26 in
the presence of the bearing 44. The inside diameter of the inner
rotary tubular body 24 is set to be approximately coincident with
the outside diameter of the sleeve 16, so that both member 16 and
24 can be rotated integrally by circumferentially engaging the
inner rotary tubular body 24 with the sleeve 16, and subsequently
tightening the ring-like nut 28 through the ring-like spacer
27.
[0040] As shown particularly in detail in FIG. 4, between the outer
circumferential surface of the inner rotary tubular body 24 and the
inner circumferential surface of the outer fixed tubular body 26,
there is formed a circular void S with a required height surrounded
on both sides by the bearings 44 and 44, and the circular void S
is, further, internally defined by two circular seal bodies 46 and
46 on the right and left sides. In addition, as shown in FIG. 4, to
the outer fixed tubular body 26, a nipple 48 is connected for
communicating with the mist supply source through a pipe (any of
which not shown), and the lower end of the nipple 48 opens to the
circular void S. Furthermore, on the inner rotary tubular body 24,
as shown in FIG. 4 likewise, twelve mist passing ports 50 are
circumferentially perforated at required intervals (at the center
angle of 30.degree. in the embodiment of FIG. 5). Thus, a mist
supplied under pressure from the mist supply source not shown comes
to a circular void S defined between the outer fixed tubular body
26 and the inner rotary tubular body 24 through the nipple 48, and
subsequently passes a multiplicity of mist passing ports 50 (twelve
in number in the illustrated example) perforated circumferentially
on the inner rotary tubular body 24.
[0041] Further, for a position where the rotary seal section 22 is
provided on the sleeve 16, as shown in FIGS. 2 and 3, a relative
position is preselected where the multiplicity of mist passing
ports 50 perforated circumferentially on the inner rotary tubular
body 24 correspondingly face an outer circular groove 32 provided
around the outer circumference of the sleeve 16. It will be
understood that by adopting such position, a mist passing the mist
passing port 50 is supplied, as shown by the arrows in FIG. 6, in
the order of the outer circular groove 32.fwdarw.passage port
36.fwdarw.inner circular groove 34.fwdarw.long groove
28.fwdarw.mist supply port.
Function of the Embodiment
[0042] Next, a function of a mist supply mechanism according to the
embodiment is described. As has been previously described with
regard to FIG. 1, around the outer circumference of the sleeve 16,
circular saws 18 and spacers 20 are alternately engaged, and the
spacer 20 located at the most right side is abutted against the
left open end of a flange 42 of an inner rotary tubular body 24
constituting the rotary seal section 22. In addition, the rotary
seal section 22 is tightened inwardly in the axial direction by a
ring-like nut 28 screwed into a male screw 16b of the sleeve 16, so
as to be rotatable integrally with the sleeve 16. Further, the
sleeve 16 circumferentially engaging with a rotating shaft 10 is
tightened by a nut 14 screwed into a bolt section 12 of the
rotating shaft 10, so as to be fixed to the rotating shaft 10 to be
rotatable integrally therewith.
[0043] An outer fixed tubular body 26 of the rotary seal section 22
is, as hereinbefore described, fixed unrotatably to an outside
fixing area by means not shown. Thus, when rotating the rotating
shaft 10, the sleeve 16 and the inner rotary tubular body 24
constituting the rotary seal section 22 rotate together with the
rotating shaft 10. Further, a mist supply source produces a mist
with pressure by, for example, mixing pressurized air with
lubricating oil, and supplies the mist to a nipple 48 provided on
the outer fixed tubular body 26 through a pipe (not shown).
[0044] As hereinbefore described, the mist thus supplied under
pressure to the nipple 48 flows in the order of a circular void
S.fwdarw.mist passing port 50.fwdarw.outer circular groove
32.fwdarw.passage port 36.fwdarw.inner circular groove
34.fwdarw.long groove 38.fwdarw.mist supply port 40. As shown in
FIG. 7, since a mist circulation groove 20a having a U-shape or an
L-shape is concaved on the end surface of the spacer 20, the mist
flowing to the outer circumference of the sleeve 16 from the mist
supply port 40 passes through the mist circulation groove 20a
having an L-shape to come to the metal base section of the circular
saw 18. At this time, the circular saw 18 rotates together with the
rotating shaft 10 at high speed, so that the mist is diffused in
the radial direction of the circular saw 18 by centrifugal force,
which cools the heat generated by friction between the workpiece
and the circular saw 18 and efficiently achieve lubrication.
Regarding Another Embodiment
[0045] FIG. 8 is a longitudinal cross section showing another
embodiment of the invention, wherein a long perforation 52 for mist
supply extending in the axial direction is perforated on a sleeve
16, at its thick section, circumferentially engaging a rotating
shaft 10 and rotating integrally therewith, and the left end of the
long perforation 52 is closed by a plug 54. In addition, the right
end of the long perforation 52 communicates with a mist supply
passage 56 for communicating with a rotary seal section 22 provided
on the right side of the rotating shaft 10. Further, on the long
perforation 52, required numbers of mist supply ports 40 similar to
those shown in FIG. 7 are perforated axially.
[0046] FIG. 9 is a longitudinal cross section showing yet another
embodiment of the invention, and in this example, a long groove 38
extending in the longitudinal axial direction is formed on the
outer circumferential surface of the sleeve 16. The long groove 38
communicates with the mist supply passage 56 of the rotary seal
section 22 disposed on the outer circumference of the sleeve 16.
Further, the long groove 38 also communicates with the mist
circulation groove 20a provided on the spacer 20. In this case, it
is sufficient that the mist circulation groove 20a is present only
in the radial direction.
[0047] That is, in the embodiment shown in FIGS. 1 to 7, the long
groove 38 as means for supplying a mist is formed on the inner
circumferential surface of the sleeve 16 in such a manner as to be
extending in the axial direction, while in the embodiment of FIG.
8, the long perforation 52 for mist supply is perforated axially on
the sleeve 16 at its thick section, and in the embodiment of FIG.
9, the long groove 38 is formed in such a manner as to be extending
in the axial direction on the outer circumferential surface of the
sleeve 16.
EFFECT OF THE INVENTION
[0048] As has been described hereinbefore, according to a mist
supply mechanism for a rotary tool of the invention, smooth supply
of mist to the rotary tool during rotation can be achieved without
using a rotating shaft for mist supply to which a rotary tool such
as a circular saw is attached. That is, the mechanism is not aimed
to provide a mist supply port around the rotating shaft, but aimed
to provide a mist supply port on a sleeve circumferentially engaged
with the rotating shaft, so that cooling/lubricating function can
be easily added to a rotating shaft in the already installed
machining device. Moreover, even in various commercially available
rotary tools having an inside diameter not coincident with a
diameter of a rotating shaft, an advantageous effect can be
achieved that free selection and use of rotary tools are
possible.
* * * * *