JP2606184Y2 - Tool holder fluid supply device - Google Patents

Description

[Detailed description of the invention]

[0001]

This invention relates to a tool holder mounted on a rotating shaft such as a main spindle provided on a machine tool such as a machining center, and a fluid such as a cutting fluid is supplied to a front part protruding from a tool holder of the tool. The present invention relates to a fluid supply device that supplies a fluid to a processing part of a workpiece by a blade part of a tool.

[0002]

2. Description of the Related Art The applicant of the present invention has previously disclosed in Japanese Patent Application No.
No. 6290 (filed on Nov. 5, 1992) proposes a fluid supply device for a tool holder. This fluid supply device has a holder main body detachably mounted on a rotary shaft of a machine tool, a tool mounting hole is provided in a front portion of the holder main body that projects forward of the rotary shaft, and an outer periphery of the rotary shaft of the machine tool is provided. In a tool holder in which the holder body is rotatably fitted to a housing (holder case) engaged with and held by a non-rotating member provided on the side of the tool holder, the outer nozzle provided in the housing is directed toward the front center side of the holder body. A front end for supplying the fluid projects forward of the housing, a fluid passage for sending the fluid from the non-rotating member side to the external nozzle is formed inside the housing and the holder body, and a rear end of the tool mounting hole is formed in the fluid passage. The parts are communicated.

In the fluid supply device for a tool holder having the above-described structure, a fluid such as a cutting fluid is sent through a fluid passage from a non-rotating member such as a spindle head of a machine tool, so that the fluid is provided in a housing. It is discharged from the front end of the external nozzle toward the front center side of the holder body, and is externally supplied to the outer periphery of the front portion of the tool that projects forward of the holder. At the same time, by making the fluid passage communicate with the rear end of the tool mounting hole provided in the holder body, a fluid such as a cutting fluid fits into the tool mounting hole via the rear end of the tool mounting hole. When a fluid supply hole is formed in the fixed tool, the fluid sent to the fluid supply hole is discharged from the front end of the tool having the front end of the fluid supply hole opened and supplied internally to the front of the tool. Guide into the workpiece hole being machined. With these arrangements, fluid such as cutting fluid can be supplied from both the outside and inside of the front part of the tool protruding from the holder, and the front part of the tool and the machined part of the workpiece can be sufficiently cooled.

[0004]

[Problem to be solved by the invention] However, in the fluid supply device of the tool holder proposed by the applicant of the invention,
It is troublesome to supply the fluid internally only from the fluid supply hole formed in the tool that is removably fitted and fixed in the mounting hole of the tool holder, so that the fluid is supplied internally from the fluid supply hole and the fluid is also supplied from the external nozzle. The supply has a problem that one fluid is wasted and the pressure of a fluid such as a cutting fluid to be supplied decreases.

This invention solves the above-mentioned problems,
Enabling the internal and external supply of fluid from the fluid supply holes and the housing of the tool and only one of them, and stopping the external supply to supply the fluid only from the fluid supply holes of the tool; It is an object of the present invention to provide a fluid supply device for a tool holder in which the use of the internal supply and the external supply can be easily switched by an operation from outside the holder.

[0006]

According to the present invention, there is provided a holder body detachably mounted on a rotating shaft of a machine tool, a tool mounting hole is provided at a front portion of the holder body, and a rotating shaft of the machine tool is provided. In a fluid supply device for a tool holder, in which the holder body is rotatably fitted to a housing engaged with and held by a non-rotating member on the outer peripheral side, a fluid is supplied from the non-rotating member side to a rear end of the tool mounting hole. the fluid passages formed within the housing and the holder body for sending, a branch passage communicating with said fluid passage formed in the housing, or
And a liquid supply plate fixed to the front of the housing.
A fluid supply path for supplying fluid to a plurality of locations on a front outer periphery of the tool removably fitted and fixed to the tool mounting hole is formed therebetween.
And it causes communication with the branch passage, provided the operating valve mechanism for branch passage open to the outside operably housing, further
Ejecting the liquid supply plate to communicate with the fluid supply path.
This is provided with a liquid supply ball having a hole and an adjustable injection angle .

[0007]

[Action] fluid supply device of the tool holder according to the invention, in an open state operation valve mechanism for branch flow channel opening and closing, fluid, fluid passages, such as cutting fluid, the supply fluid ball through the branch passage and the fluid supply passage Can be externally supplied to the outer periphery of the front part of the tool attached to the tool mounting hole of the holder body from the injection hole of the holder body. When the tool has a fluid supply hole, the fluid is supplied to the fluid passage, the tool mounting hole, the fluid supply Through the hole, the tool can be internally supplied from the tip of the tool to the processing portion of the workpiece by the tool. If the tool is not provided with a fluid supply hole, only the external supply can be performed without supplying the fluid internally.

In the state where the operation valve mechanism is closed,
A fluid such as a cutting fluid can be supplied only internally to a machining portion of a workpiece by a tool via a fluid passage, a tool mounting hole, and a fluid supply hole formed in the tool without externally supplying the fluid. By externally opening and closing one operating valve mechanism by an operation from outside the tool holder, external supply of fluid can be performed or stopped.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. 1 and 2, reference numeral 1 denotes a holder main body of a tool holder. The holder main body 1 is provided with a grip portion 3 for automatic tool change in front of a tapered shank portion 2, and a front portion 4 in front of the grip portion 3. A tool mounting hole 5 is formed, and a front end of the tool mounting hole 5 is opened in a front end surface of the holder body 1.

A housing 6 of a tool holder is rotatably fitted and held at a front portion of the holder body 1 via front and rear bearings 7, and the housing 6 is restrained in the front-rear direction with respect to the holder body 1. , The front end is disposed behind the front end of the holder body 1.

The housing 6 has a liquid supply plate 8 fixed to a front end surface of a housing body 6a, and a housing main body 6a.
A guide cylinder 9 extending in the front-rear direction is fixed to a lower part of the housing, and a clutch member 10 is disposed at a rear part of the housing main body 6a. The lower portion of the clutch member 10 is fitted to the rear part of the guide cylinder 9 protruding rearward of the housing main body 6a so as to be movable in the front-rear direction. Have been.
The upper portion of the clutch member 10 is supported on the front side of the grip portion 3 of the holder body 1 via a ring 13 and is fitted to a positioning pin 12 projecting rearward of the housing body 6a so as to be movable in the front-rear direction. Further, a clutch pin 1 fixed to the holder body 1 via a ring 13 in a notch 10a formed at the upper end of the clutch member 10
3a are configured to engage.

A fluid introduction hole 9a is opened at the rear end surface of the guide cylinder 9, and the fluid passage 1 having the introduction hole 9a as an upstream end.
4 is formed inside the guide cylinder 9, the housing main body 6 a and the holder main body 1, and the fluid passage 14 communicates a positioning block 15 on the machine tool side described later with a rear end of the tool mounting hole 5 of the holder main body 1. It is configured to be. An annular groove 14 is provided on the inner peripheral surface of the housing main body 6a.
In the branch passage 17, the inner portion of the housing main body 6a and the inner portion of the holder main body 1 are always connected.
Further, a spherical valve 3 for opening and closing the introduction hole 9a is provided in the guide cylinder 9.
1 and an inner spring 16 for urging the spherical valve 31 in the closing direction.

The fluid passage 14 communicates with the rear end of the tool mounting hole 5 from the guide cylinder 9 through the housing main body 6a and the inside of the holder main body 1, and is formed in the lower part of the housing main body 6a along the axial direction thereof. The rear end of one branched passage 17 is communicated with the front end of the branched passage 17 and the fluid supply passage 18.
Is communicated with the rear end. The fluid supply passage 18 has an arc-shaped rear portion 18a centered on the tool mounting hole 5 and a lower flow path 18c extending below the rear portion 18a between the front end surface of the housing main body 6a and the rear end surface of the liquid supply plate 8. And is communicated with six front portions 18b which penetrate the liquid supply plate 8 in the axial direction, and the front portions 18b are provided at four positions in the circumferential direction which are concentric with the axis of the holder body 1 and the tool mounting hole 5 and the shaft. It is arranged at two places below in the direction perpendicular to the heart.

An oil supply bush 19 is fitted and fixed to the front portion 18b of the fluid supply passage 18 as shown in detail in FIG. 3, and the oil supply bush 19 rotates with a required resistance. 20 is rotatably held, and the liquid supply ball 2
0 has an ejection hole 20a penetrating therethrough.

The branch passage 17 includes a ball valve 21 for opening and closing the branch passage 17 and a valve spring 22 for urging the ball valve 21 forward. The ball valve 21 is provided at the front end of the branch passage 17. An opening / closing operation screw 23 is screwed into the liquid supply plate 8, and an operation valve mechanism 32 for opening / closing the branch passage 17 is provided in the housing 6. The opening / closing operation screw 23 has a head 23a disposed on the front side of the liquid supply plate 8 and a leg 23b extending rearward. The leg 23b is inserted into the branch passage 17 with a gap therebetween, and the rear end is provided with a ball valve 21. Is in contact with

A shank 24a of a tool 24 made of a drill is inserted into the tool mounting hole 5, and the holder body 1
A clamp bolt 35 is screwed into a front end protruding forward of the housing 6, and the shank 24 a of the tool 24 is detachably fixed to the holder body 1 by these bolts 25. The tool 24 has a fluid supply hole 24c that is opened at the rear end face thereof, branched into a plurality of portions, and has an injection port 24d opened at the tip of the blade portion 24b.

In FIG. 2, reference numeral 25 denotes a rotating shaft such as a spindle provided on a numerical control type machine tool such as a machining center; 26, a non-rotating member such as a spindle head on which the rotating shaft 25 is fitted; The positioning block 15 is fixed to the lower surface of the front end portion of the rotating member 26, and a rear chamber 27 provided in the block 15 has a fluid supply source (not shown) provided at an appropriate position and a flow having a flexible hose 28 and the like. A push rod 30 fixed to the rear chamber 27 protrudes into a cylindrical positioning portion 29 that is communicated via a path and communicates with the rear chamber 27.

Next, the operation of the fluid supply device for a tool holder according to the embodiment having the above-described configuration will be described. The tool 2 is inserted into the tool mounting hole 5 provided in the holder body 1 of the tool holder.
The 4 shank 24a is fitted and fixed in advance. In this state, the grip portion 3 of the holder body 1 is gripped by an automatic tool changer (not shown) provided on the machine tool, and the tapered shank portion 2 of the holder body 1 is attached to the front end of the rotating shaft 25 of the machine tool. It is fitted into the provided tapered hole 25a.

Subsequently, the taper shank portion of the holder main body 1 is operated by an automatic attachment / detachment mechanism (not shown) provided at the back of the tapered hole 25a of the rotary shaft 25 and the automatic tool changer. 2, the shank portion 2 is pulled to a predetermined position, and the guide cylinder 9 provided in the housing 6 is pulled to a predetermined position.

When the guide cylinder 9 is pulled in as described above, the guide cylinder 9 is pushed onto the push rod 30 fixed to the positioning block 15.
The inner spherical valve 31 moves forward and opens against the spring force of the inner spring 16, and the rear chamber 27 of the positioning block 15 and the introduction hole 9 a provided in the rear end face of the guide cylinder 9, that is, upstream of the fluid passage 14. The end communicates. At the same time, the clutch member 10 is pressed against the front end face of the positioning block 15, moves forward against the spring force of the outer spring 11, and is attached to the notch 10a provided at the upper end of the clutch member 10 and the holder body 1. The engagement with the clutch pin 13 a fixed via the ring 13 is released, and the holder main body 1 becomes free to rotate with respect to the housing 6.

In this state, the rotating shaft 25 is driven to rotate the holder body 1 and the tool 24 integrally. At this time, the rear end of the guide tube 9 is
5 does not rotate.
Subsequently, a flow path (not shown) connecting the positioning block 15 and the fluid supply source is opened, and the cutting fluid is pumped to the rear chamber 27 of the positioning block 15.

As shown in FIG. 4, when the ball valve 21 of the operation valve mechanism 32 is open, the cutting fluid sent to the rear chamber 27 through the introduction hole 9a of the guide cylinder 9 flows through the fluid passage 14 as shown in FIG.
Is sent to the branch passage 17 through the guide cylinder 9 and the portion inside the housing main body 6a, and further sent to the six front portions 18b thereof through the fluid supply passage 18 to eject the liquid supply balls 20 provided in these. fitted from the hole 20a in the holder main body 1
It is jetted toward the obliquely forward center side of the tool 24 .

At the same time, the cutting fluid is sent from the downstream side of the branch passage 17 of the fluid passage 14 to the fluid supply hole 24c of the tool 24 via the portion inside the holder body 1 and the rear end of the tool mounting hole 5. , Injection port 2 opened at the front end of tool 24
From 4d, it is ejected to the processing part of the workpiece .

In the state described above, the non-rotating member 2 of the machine tool
6, the rotary shaft 25 and the tool holder are advanced, and the cutting portion 24b of the tool 24 is pressed by the cutting fluid ejected from the injection port 24d at the front end of the tool 24 while the cutting portion 24b of the tool 24 is pressed against the workpiece. Of the blade 24b and the rear part of the workpiece by the cutting fluid ejected from the ejection hole 20a of the liquid supply ball 20 to the outside of the tool 24 and the workpiece 24 at the same time. Cool the workpiece.

After the machining of the workpiece is completed, the non-rotating member 2
6, the rotary shaft 25 and the tool holder are retracted, the blade portion 24b of the tool 24 is pulled out of the workpiece, and the non-rotating member 2 is removed.
6 is returned to the original position and stopped, the rotation of the rotating shaft 25 is also stopped, and the positioning block 15
The supply of cutting fluid to is also stopped.

The rotating shaft 25 is held at a position where the clutch pin 13a fixed to the holder body 1 via the ring 13 and the notch 10a of the clutch member 10 provided on the housing 6 are opposed to each other. The rotation with respect to the housing 6 is restricted, the grip portion 3 is gripped by the automatic tool changer, the shank portion 2 of the holder body 1 is pulled out from the tapered hole 25a of the rotating shaft 25, and the guide cylinder 9 provided on the housing 6 is positioned by the positioning block. Fifteen
And the tool holder is returned to a predetermined position outside the rotary shaft 25 and the positioning block 15.

In this embodiment, the tool holder is connected to the rotating shaft 2
3, the rod 33 is inserted into the ejection hole 20a of the liquid supply ball 20 to roll the liquid supply ball 20, and the inclination angle of the ejection hole 20a with respect to the axial direction of the tool 24 is set, as shown in FIG. By changing the rod 33 in advance and extracting the rod 33 from the ejection hole 20a, the cutting fluid ejected from the ejection hole 20a can be accurately supplied to a required position.

Also, by independently rolling the six liquid supply balls 20, the inclination angles of the ejection holes 20a are made different from each other to cool the entire blade portion 24b of the tool 24 from the outer peripheral side, It is possible to improve the removal of cutting chips attached to the blade portion 24b.

In this embodiment, as shown in FIG. 5, when the ball 21 of the operation valve mechanism 32 is open, the shank 34a of the tool 34 having no fluid supply hole is attached to and detached from the tool mounting hole 5 of the holder body 1. When the tool is fitted and fixed as much as possible and performs the same operation as in the case of using the tool 24 having the fluid supply hole 24c, the cutting fluid is ejected only from the ejection hole 20a of the liquid supply ball 20, and the tool 34 Only external supply to the outer peripheral surface of the blade portion 34b can be performed.

As shown in FIG. 6, the operation valve mechanism 32
The opening / closing operation screw 23 provided on the tool holder is rotated from the front of the tool holder using a screwdriver or the like, and the operation screw 23 is moved in a direction of being pulled out from the liquid supply plate 8 forward. Move forward, valve seat 17
a to close the branch passage 17. In this state, the shank 24a of the tool 24 having the fluid supply hole 24c is detachably fitted and fixed to the tool mounting hole 5 of the holder body 1,
By performing the same operation as the above-described operation, the fluid supply hole 24c
The cutting fluid is ejected only from the ejection port 24d of the
Only the internal supply for cooling the front end of the blade portion 24b and the processing portion of the workpiece can be performed.

When only the external supply and the internal supply of the cutting fluid shown in FIGS. 5 and 6 are performed, the use of the cutting fluid is compared with the case where both the external supply and the internal supply shown in FIG. 4 are performed. However, only a small amount is required, and the output power of the cutting fluid can be increased.

The opening / closing operation screw 23 is connected to the liquid supply plate 8.
To the direction of pushing backward from the
The ball valve 21 is separated from the valve seat 17a against the spring force of the valve spring 22 by the leg 23b of the leg 23b, and the branch passage 17 is opened, so that the cutting fluid is ejected from the ejection hole 20a of the liquid supply ball 20. Will be possible. Therefore, the external supply of the cutting fluid can be stopped or performed by a simple operation of moving the single opening / closing operation screw 23 only.

In the present invention, the number and position of the liquid supply balls are not necessarily limited to the above-described embodiment, but can be changed as appropriate, for example, to three, and the tool is not limited to a drill but may be changed to a reamer or the like. Can be changed, the tool shank and mounting hole can be changed as appropriate, such as by tapering,
The configuration of the operation valve mechanism for the branch passage is not limited to one as long as it can be operated from the outside of the tool holder, and the fluid supply passage 18 formed continuously in the circumferential direction of the housing main body 6a is not limited. May be provided as a discontinuous fluid supply passage 18 at each of a plurality of locations.

[0034] Then, the shank portion of the holder body can always suitably changed without being limited to those having a pull scan Taddoboruto, the tool attachment hole is not limited to the straight hole, the tapered shank of the tool to the tapered hole The tool may be fixed to the holder body by an appropriate means, and a tool is not limited to a drill, and a reamer or the like can be used.

[0035]

As described above, the present invention has a holder body detachably mounted on a rotating shaft of a machine tool, and a tool mounting hole is provided at a front portion of the holder body to rotate the machine tool. In a fluid supply device for a tool holder in which the holder body is rotatably fitted to a housing engaged with and held by a non-rotating member on the outer peripheral side of a shaft, a rear end portion of the tool mounting hole from the non-rotating member side A fluid supply passage formed in the housing and the holder main body, a branch passage communicating with the fluid passage formed in the housing, and fixed to a front surface of the housing.
Between the bets, it causes communication with the branch passage to form a fluid supply passage for supplying a fluid at a plurality of positions of the front outer periphery of the tool which is detachably fitted and fixed to the tool attachment hole, a branch passage opening Is provided on the housing so as to be operable externally , and further communicates with the fluid supply path to the liquid supply plate.
The following effects can be obtained by providing a supply ball having an ejection angle which can be adjusted and which has an ejection hole .

[0036] That is, the fluid supply device of the tool holder according to the invention, in an open state operation valve mechanism for opening and closing the branch flow path, a fluid such as cutting fluid feed through the fluid passage, the branch passage and the fluid supply passage Injection angle adjustment provided on the liquid plate
From the squirt hole of the liquid supply ball which can be adjusted, it is possible to reliably supply an external part to a desired position on the outer periphery of the front part of the tool attached to the tool mounting hole of the holder body, and the fluid supply hole is formed in the tool If there is
Is, the fluid, the fluid passage, the tool attachment hole, through the fluid supply hole, possible internal feed from the tip of the tool to the machining portion of the workpiece with the tool, if not fluid supply hole is formed in the tool,
Only the external supply can be performed without supplying the fluid internally.

In the state where the operation valve mechanism is closed,
A fluid such as a cutting fluid can be supplied only internally to a machining portion of a workpiece by a tool via a fluid passage, a tool mounting hole, and a fluid supply hole formed in the tool without externally supplying the fluid. By externally opening and closing one operating valve mechanism by an operation from outside the tool holder, external supply of fluid can be performed or stopped.

Therefore, it is easy to switch between the internal supply and the external supply of the fluid such as the cutting fluid and the supply of both of them, and when only the internal supply and the external supply are performed, the supply of the fluid is wasted. It can be used in a small amount, the output of the fluid can be increased, and the switching operation is simple.

[Brief description of the drawings]

FIG. 1 is a front view showing a fluid supply device for a tool holder according to an embodiment of the present invention;

FIG. 2 is a sectional view taken along line AA of FIG. 1;

FIG. 3 is an explanatory view showing a relationship between an oil supply bush, an oil supply ball, and a rod for changing a cutting fluid ejection hole of the tool holder shown in FIG. 2;

FIG. 4 is an explanatory diagram of the internal and external liquid supply states of the fluid supply device shown in FIG. 2;

FIG. 5 is an explanatory diagram of an external liquid supply state of the fluid supply device shown in FIG. 2;

FIG. 6 is an explanatory diagram of a state of liquid supply inside the fluid supply device shown in FIG. 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Holder main body of tool holder 2 Taper shank part 3 Grip part 4 Front part of holder main body 5 Tool mounting hole 6 Housing 6a Housing main body 8 Liquid supply plate 9 Guide cylinder 10 Clutch member 11 Outer spring 12 Positioning pin 13 Mounting ring 13a Clutch pin Reference Signs List 14 fluid passage 15 positioning block 16 inner spring 17 branch passage 17a valve seat 18 fluid supply passage 19 oil supply bush 20 supply ball 20a ejection hole 21 ball valve 22 valve spring 23 opening / closing operation screw 24 tool 24a shank portion 24b blade portion 24c fluid Supply hole 24d Injection port 25 Rotating shaft 26 Non-rotating member 27 Rear chamber 29 Positioning part 30 Push rod 31 Spherical valve 32 Operating valve mechanism 34 Tool without fluid supply hole

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-49-97982 (JP, A) JP-A-4-9251 (JP, U) JP-A-63-35556 (JP, U) (58) Investigation Field (Int.Cl. ⁷ , DB name) B23Q 11/10

Claims (1)

(57) [Scope of request for utility model registration] An apparatus has a holder body detachably mounted on a rotating shaft of a machine tool, a tool mounting hole is provided in a front portion of the holder body, and a tool mounting hole is provided for a non-rotating member on the outer peripheral side of the rotating shaft of the machine tool. In a fluid supply device for a tool holder, wherein the holder body is rotatably fitted to a housing to be held and held, a fluid passage for sending fluid from the non-rotating member side to a rear end of the tool mounting hole is provided by the housing and the holder. A branch passage formed inside the main body and communicating with the fluid passage is formed inside the housing, and on the front surface of the housing.
Between the fixed liquid supply plate, along with communicating with the branch passage to form a fluid supply passage for supplying a fluid at a plurality of positions of the front outer periphery of the tool which is detachably fitted and fixed to the tool attachment hole, It provided the operating valve mechanism for branch passage open to the outside operably housing, further wherein the liquid supply plate
Adjustable jet angle with jet holes communicating with fluid supply path
A fluid supply device for a tool holder, wherein a fluid supply ball is provided.