Mist supply mechanism for rotary tool
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.
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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 ARTA 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.
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,
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.
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 INVENTIONThe 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 PROBLEMSIn 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
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 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).
In order to overcome the above problems and suitably achieve the anticipated object, the other invention of this application 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
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).
In order to overcome the above problems and suitably achieve the anticipated object, the another invention of this application 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
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).
BRIEF DESCRIPTION OF THE DRAWINGS
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.
Regarding a Sleeve
In
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
In
As shown in
As shown in
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
Regarding Rotary Seal Section
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
As shown particularly in detail in
Further, for a position where the rotary seal section 22 is provided on the sleeve 16, as shown in
Function of the Embodiment
Next, a function of a mist supply mechanism according to the embodiment is described. As has been previously described with regard to
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).
As hereinbefore described, the mist thus supplied under pressure to the nipple 48 flows in the order of a circular void S→mist passing port 50→outer circular groove 32→passage port 36→inner circular groove 34→long groove 38→mist supply port 40. As shown in
Regarding Another Embodiment
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
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.
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)
Type: Application
Filed: May 26, 2003
Publication Date: May 4, 2006
Applicant:
Inventor: Tsuyoshi Ide (Niwa-gun)
Application Number: 10/526,874
International Classification: B24B 55/02 (20060101);