JP2019115968A - Oil feeder - Google Patents

Abstract

To provide an oil feeder capable of efficiently feeding oil to an oil tank of a tool holder.SOLUTION: An oil feeder 1A feeds oil to an oil tank 50 of a tool holder 10. The oil feeder device 1A comprises: a coupling part 70 that can be attached to and detached from an injection port 60 in communication with the inside of the oil tank 50; an oil feeding device 80 for feeding the oil to the coupling part 70; and a control part for controlling the coupling part 70 and the oil feeding device 80. When a decrease amount of the oil in the oil tank 50 reaches a set value, the control part 90 connects the coupling part 70 to the injection port 60 and feeds the oil from the coupling part 70 to the oil tank 50.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a fueling device for supplying oil to an oil tank of a tool holder.

In general, a machine tool processes a workpiece while supplying oil as a cutting fluid to a processing unit for cooling, lubrication, swarf removal and the like of the workpiece and the tool.
Then, as a machine tool, there is one in which an oil tank is provided in a tool holder attached to a main shaft, and oil in the oil tank is supplied to a processing unit. In such a machine tool, a refueling device for supplying oil into an oil tank is provided (see, for example, Patent Document 1).

Unexamined-Japanese-Patent No. 2000-210836

  In the above-described conventional oiling apparatus, the oil is supplied to the oil tank before processing of the work regardless of the remaining amount of oil in the oil tank, so the number of times the oil is supplied to the oil tank is increased. And while supplying oil to an oil tank, there is a problem that a tool holder can not be used.

  An object of the present invention is to solve the above-mentioned problems and to provide a fueling device capable of efficiently supplying oil to an oil tank of a tool holder.

  In order to solve the above-mentioned subject, the present invention is an oiling device for supplying oil to an oil tank provided in a tool holder attached to a spindle of a machine tool. The oil supply device includes: a connecting portion detachably connected to an injection port communicating with the inside of the oil tank; an oil supplying device for supplying oil to the connecting portion; and a control unit for controlling the connecting portion and the oil supplying device. Have. The control unit connects the connection portion to the injection port when the amount of reduction of oil in the oil tank reaches a set value, and supplies the oil from the connection portion to the oil tank.

  In the oil supply apparatus of the present invention, since the oil can be efficiently supplied to the oil tank of the tool holder as needed, the number of times of oil supply to the oil tank of the tool holder can be suppressed.

It is the block diagram showing the fueling device concerning a first embodiment of the present invention. It is a side sectional view showing a tool holder concerning a first embodiment of the present invention. The oil supply apparatus which concerns on 1st embodiment of this invention WHEREIN: It is the sectional side view which showed the state which the connection part and the injection port have not connected. The oil supply apparatus which concerns on 1st embodiment of this invention WHEREIN: It is the sectional side view which showed the state which the connection part and the injection port connected. It is a flow chart of a refueling method using a refueling device concerning a first embodiment of the present invention. It is a side view showing a sensor of a fueling device concerning a second embodiment of the present invention. It is the block diagram which showed the fueling apparatus which concerns on 3rd embodiment of this invention.

Embodiments of the present invention will be described in detail with reference to the drawings as appropriate.
In the description of each embodiment, the same components will be denoted by the same reference symbols and redundant description will be omitted.

First Embodiment
The oil supply apparatus 1A of the first embodiment supplies oil to an oil tank 50 provided in the tool holder 10, as shown in FIG. In the following description, after the configuration of the tool holder 10 is first described, the configuration of the fuel supply device 1A will be described.

  The tool holder 10, as shown in FIG. 2, includes a main body 30, a fixing portion 20 attached to the tip end surface of the main body 30, a nozzle 40 for generating oil mist, and an oil tank 50 for storing oil. Is equipped. The main body 30 is a part that can be attached to and detached from the spindle 2 of the machine tool. The fixing portion 20 is a portion to which the tool T is fixed.

The main body portion 30 is a cylindrical member in which the support portion 32 on the distal end side and the mounting portion 31 on the proximal end side are formed.
The mounting portion 31 is a portion held by the tapered hole of the main shaft 2. The outer peripheral surface of the mounting portion 31 is formed in a tapered shape that can be in close contact with the tapered hole of the spindle 2. At the proximal end of the mounting portion 31, a fitting portion 33 held by the tool magazine 3 (see FIG. 1) is formed.
An air flow passage 35 extends in the axial direction at the center of the mounting portion 31. The air flow passage 35 communicates with an air flow passage (not shown) of the main shaft 2 when the mounting portion 31 is mounted on the main shaft 2.

  The nozzle 40 is provided in the support portion 32. The nozzle 40 mixes oil and air to generate an oil mist, and jets the oil mist toward the tool T attached to the fixed portion 20. The tool T is formed with a through hole that penetrates in the axial direction, and oil mist is supplied to the through hole from the nozzle 40.

The oil tank 50 is disposed radially outside the support portion 32, and is a cylindrical (annular) case surrounding the support portion 32. An annular internal space 51 surrounding the support portion 32 is formed in the oil tank 50.
An annular piston 54 is accommodated in the internal space 51 of the oil tank 50. The piston 54 is movable in the internal space 51 in the axial direction of the tool holder 10.
The internal space 51 is divided into two spaces by the piston 54. In the internal space 51, a storage chamber 55 is formed on one side of the piston 54, and a pressure chamber 56 is formed on the other side of the piston 54. The storage chamber 55 is connected to the nozzle 40 via a flow path in the support portion 32.

  The storage chamber 55 is a space filled with oil. The pressurizing chamber 56 is a space to which high-pressure air is supplied. The pressure of the air in the pressure chamber 56 pushes the piston 54 toward the storage chamber 55, whereby the oil in the storage chamber 55 is pressurized.

In the support portion 32, a first branch flow passage 36 and a second branch flow passage 37 branched from the air flow passage 35 in the mounting portion 31 are formed.
The first branch flow passage 36 is a flow passage extending from the air flow passage 35 to the pressurizing chamber 56. The first branch channel 36 is provided with a first regulator 36 a.
The second branch flow channel 37 is a flow channel from the air flow channel 35 to the nozzle 40. A second regulator 37 a is provided in the second branch flow channel 37.

An injection port 60 for supplying oil to the storage chamber 55 of the oil tank 50 is provided on the outer peripheral surface of the oil tank 50. The injection port 60 is in communication with the storage chamber 55 via the flow passage in the support portion 32.
The injection port 60 is provided with a valve mechanism as shown in FIG. Normally, the valve body 61 is seated on the valve seat of the valve seat member 62, and the injection port 60 is closed. As shown in FIG. 4, when the supply port 73 of the connection unit 70 described later is connected to the injection port 60, the valve body 61 of the injection port 60 is pushed inward by the valve body 73 a of the supply port 73. Thereby, the valve body 61 is separated from the valve seat of the valve seat member 62, and the injection port 60 is in an open state.

As shown in FIG. 1, the tool magazine 3 includes a drive 3a, a rotary member 3b connected to the drive 3a, and a plurality of tool holders 3c provided on the outer peripheral portion of the rotary member 3b. There is.
The tool holder 10 is held by the tool holder 3 c by fitting the fitting portion 33 of the main body 30 of the tool holder 10 into the groove of the tool holder 3 c.

The tool holder 10 is held by a tool magazine 3 of a machine tool. The tool magazine 3 holds a plurality of tool holders 10. The tool magazine 3 is housed in the magazine cover 4.
When the tool holder 10 is supplied to the spindle 2, the spindle 2 is inserted into the magazine cover 4 and the main body 30 of the tool holder 10 disposed at the tool replacement position (for example, the lowermost position) of the rotating member 3b 2 are linked.
When returning the tool holder 10 to the tool holder 3c, the main shaft 2 to which the tool holder 10 is connected is inserted into the magazine cover 4 and the tool holder 10 is held by the tool holder 3c at the tool change position. The tool holder 10 is removed from the

  When a workpiece is processed by the tool T, high pressure air is supplied from an air supply device (not shown) to the air flow path (not shown) of the main shaft 2. This air flows from the air flow path of the main shaft 2 into the air flow path 35 of the tool holder 10, and branches into the first branch flow path 36 and the second branch flow path 37, as shown in FIG.

  Air flowing through the first branch flow path 36 is supplied to the pressure chamber 56. The pressure of the air supplied to the pressurizing chamber 56 through the first branch flow passage 36 is adjusted by the first regulator 36 a. Then, the pressure of the air supplied to the pressurizing chamber 56 pushes the piston 54 toward the storage chamber 55, whereby pressure is applied to the oil in the storage chamber 55. Thus, the oil in the storage chamber 55 is supplied to the nozzle 40 through the flow path.

  The air flowing through the second branch flow path 37 is supplied to the nozzle 40. The pressure of the air supplied to the nozzle 40 through the second branch flow path 37 is adjusted by the second regulator 37a.

  In the nozzle 40, the oil supplied from the storage chamber 55 and the air supplied from the second branch flow channel 37 are mixed to generate an oil mist, and the oil mist is directed to the tool T attached to the fixed portion 20. Spout. The oil mist is supplied to the processing portion of the work through the through hole of the tool T.

  In the tool holder 10 of the first embodiment, the pressure of air for ejecting the oil mist from the nozzle 40 and the pressure of air for feeding the oil to the nozzle 40 can be adjusted separately, so that the tool T can be used as the tool T. It is possible to improve the quality such as the injection speed of the oil mist to be supplied and the oil content rate.

The oil supply apparatus 1A supplies oil to the oil tank 50 of the tool holder 10, as shown in FIG. The oil supply apparatus 1A includes a connecting portion 70 which is attachable to and detachable from the injection port 60 of the oil tank 50, an oil supply device 80 which supplies oil to the connecting portion 70, and a control unit 90 And.
The connecting portion 70 is accommodated in the magazine cover 4, and the oil supply device 80 and the control unit 90 are disposed outside the magazine cover 4.

  The connecting portion 70 includes a movable member 71 which can be advanced and retracted in the radial direction of the rotary member 3 b of the tool magazine 3 and a drive device 72 which moves the movable member 71.

  In the connecting portion 70 of the first embodiment, the movable member 71 is disposed above the position of the top of the rotating member 3b. Specifically, the movable member 71 is disposed to face the outer peripheral surface of the oil tank 50 of the tool holder 10 disposed at the position of the top of the rotary member 3b. In the first embodiment, the position of the top of the rotating member 3 b is an oil supply position for supplying oil to the oil tank 50 of the tool holder 10. That is, the movable member 71 is disposed outside the radial direction of the oil tank 50 of the tool holder 10 disposed at the oil supply position.

  A supply port 73 is provided on a tip end surface (lower end surface) of the movable member 71 on the tool magazine 3 side. Further, an inlet 71 a is formed on the side surface of the movable member 71. A flow path from the inflow port 71 a to the supply port 73 is formed in the movable member 71.

  As shown in FIG. 3, the supply port 73 is provided with a valve mechanism. Normally, the valve body 73a is seated on the valve seat of the valve seat member 73b, and the supply port 73 is closed. As shown in FIG. 4, when the injection port 60 of the tool holder 10 is connected to the supply port 73, the valve seat member 73 b of the supply port 73 is pushed by the valve seat member 62 of the injection port 60. As a result, the valve seat of the valve seat member 73b is separated from the valve body 73a, and the supply port 73 is in an open state.

The driving device 72 moves the movable member 71 in the radial direction of the rotating member 3b, as shown in FIG. The drive device 72 includes a drive source such as a hydraulic cylinder or a motor, and includes a rod 72a which can be advanced and retracted in the radial direction of the rotating member 3b by the drive source.
The base end surface (upper end surface) of the movable member 71 is connected to the tip end portion (lower end portion) of the rod 72a. Thus, the movable member 71 advances and retracts in the radial direction (vertical direction) of the rotating member 3b in conjunction with the advancement and retraction of the rod 72a.

Under normal conditions, the movable member 71 is disposed apart from the tool holder 10 held by the tool magazine 3 in the upper direction.
When supplying oil to the oil tank 50 of the tool holder 10, the movable member 71 is moved to the tool holder 10 side by the drive device 72, whereby the supply port 73 of the movable member 71 is connected to the injection port 60 of the tool holder 10. .
When the supply of oil to the oil tank 50 of the tool holder 10 is completed, the movable member 71 is moved in a direction away from the tool holder 10 by the drive device 72, whereby the supply port 73 of the movable member 71 is an injection port of the tool holder 10. Get out of 60
As described above, the supply port 73 of the connecting portion 70 is detachable from the injection port 60 of the tool holder 10 held by the tool magazine 3.

The oil supply device 80 includes a pressure feed pump (not shown) for feeding the oil to the movable member 71, and a tank (not shown) in which the oil is stored.
An oil supply pipe 74 is interposed between the oil supply device 80 and the movable member 71. One end of the oil supply pipe 74 is connected to the discharge port of the oil supply device 80, and the other end is connected to the inflow port 71 a of the movable member 71.
Oil is supplied from the oil supply device 80 to the movable member 71 through the oil supply pipe 74, and oil is further supplied to the supply port 73 through the flow passage in the movable member 71.

  The control unit 90 is a computer that controls the connection unit 70 and the drive of the oil supply device 80. Each process of the control unit 90 is realized by the CPU (central processing unit) executing a program stored in the storage unit.

  The control unit 90 drives the drive device 72 of the connecting unit 70 when the amount of reduction of the oil in the storage chamber 55 of the tool holder 10 reaches a preset set value. Thereby, the movable member 71 moves toward the tool holder 10.

The control unit 90 of the first embodiment detects the amount of reduction of the oil in the storage chamber 55 based on the number of times the tool holder 10 is used. That is, the amount of reduction of oil is calculated from the number of times of use of the tool holder 10 by measuring in advance the amount of reduction of oil when the tool holder 10 is used once and inputting it to the control unit 90.
The control unit 90 stores the number of times each tool holder 10 has been used after the supply of oil.

The control unit 90 moves the movable member 71 to a position where the supply port 73 of the movable member 71 is connected to the injection port 60 of the tool holder 10 and stops the driving device 72.
After stopping the drive device 72, the control unit 90 drives the oil supply device 80 to supply the oil from the oil supply device 80 to the movable member 71.

After driving the oil supply device 80, the control unit 90 stops the oil supply device 80 and stops the supply of oil to the movable member 71 when a preset time elapses.
The time during which the control unit 90 drives the oil supply device 80 is set by measuring in advance the time during which the same amount of oil as the reduced amount of oil is supplied.

  After stopping the oil supply device 80, the control unit 90 drives the drive device 72 in the reverse direction to move the movable member 71 in the direction away from the tool holder 10. Thus, the supply port 73 is disengaged from the injection port 60.

  Next, a method of refueling the tool holder 10 using the refueling device 1A of the first embodiment will be described. In the following description, the flowchart shown in FIG. 5 will be referred to as appropriate.

  As shown in FIG. 1, in the tool magazine 3, when the tool holder 10 is disposed at the oil change position, the control unit 90 reaches the preset number of times the tool holder 10 has been used after oil supply. It is determined whether or not it is (S11).

If the number of times the tool holder 10 has been used after the supply of oil has reached a preset number (YES in S11), the control unit 90 determines that the amount of reduction of oil has reached the set value. In this case, the control unit 90 drives the drive device 72 to connect the supply port 73 of the movable member 71 to the injection port 60 of the tool holder 10 (S12).
As a result, as shown in FIG. 4, the valve mechanism of the supply port 73 and the injection port 60 is opened, and oil can flow from the supply port 73 to the injection port 60.

  When the supply port 73 is connected to the injection port 60, the control unit 90 drives the oil supply device 80 from the oil supply device 80 through the movable member 71, as shown in FIG. The oil is supplied into the 50 storage chambers 55 (S13).

After driving the oil supply device 80, the control unit 90 stops the oil supply device 80 and drives the drive device 72 in the opposite direction to remove the supply port 73 from the injection port 60 when a predetermined time elapses. (S14).
Thus, the supply of oil to the oil tank 50 provided in the tool holder 10 is completed.

  When the tool holder 10 is disposed at the oil change position of the tool magazine 3 and the number of times the tool holder 10 has been used has not reached the set number (NO in S11), the control unit 90 controls the oil It is determined that the reduction amount of has not reached the set value. In this case, the supply of oil to the oil tank 50 of the tool holder 10 is not performed.

  The oil supply apparatus 1A as described above supplies oil to the oil tank 50 provided in the tool holder 10 attached to the main shaft 2 of the machine tool, as shown in FIG. The oil supply apparatus 1A includes a connecting portion 70 which is attachable and detachable to an injection port 60 communicating with the inside of the oil tank 50, an oil supply device 80 which supplies oil to the connecting portion 70, and a control unit which controls the connecting portion 70 And 90. When the reduction amount of oil in the oil tank 50 reaches the set value, the control unit 90 connects the connecting unit 70 to the injection port 60 and supplies the oil from the connecting unit 70 to the oil tank 50.

  In the oil supply apparatus 1A of the first embodiment, the oil is supplied to the storage chamber 55 according to the amount of reduction of the oil in the storage chamber 55 of the tool holder 10. As described above, since the oil can be efficiently supplied to the tool holder 10 as necessary, the number of times the oil is supplied to the tool holder 10 can be suppressed, and the processing efficiency of the work can be enhanced.

In the first embodiment, the control unit 90 detects the amount of reduction of the oil in the oil tank 50 based on the number of times the tool holder 10 is used.
In this configuration, since it is not necessary to provide a device for measuring the amount of oil in the oil tank 50, the configuration of the fueling device 1A can be simplified and the manufacturing cost can be reduced.

In the first embodiment, the connecting portion 70 is detachable from the injection port 60 disposed on the outer peripheral portion of the tool holder 10.
In this configuration, since the oil can be supplied to the oil tank 50 from the outer side in the radial direction of the tool holder 10, it becomes easy to secure the installation space of the fueling device 1A and increase the freedom of the layout of the fueling device 1A. it can.

In the oil supply apparatus 1A of the first embodiment, the connection portion 70 is detachable from the injection port 60 of the tool holder 10 held by the tool magazine 3.
In this configuration, since oil can be supplied to the tool holder 10 held by the tool magazine 3 during processing of the work, the oil tank 50 of the tool holder 10 is not stopped without stopping work processing of the work. It can supply oil.

  As mentioned above, although 1st embodiment of this invention was described, this invention can be suitably changed in the range which does not deviate from the meaning, without being limited to the said 1st embodiment.

Although 1 A of oil supply apparatuses of 1st embodiment are shown in FIG. 1, although oil is supplied to the tool holder 10 by which the oil tank 50 is arrange | positioned at the outer peripheral part of the tool holder 10, the oil supply apparatus of 1st embodiment The configuration of the tool holder to which 1A can be applied is not limited.
For example, in the fueling device 1A of the first embodiment, an oil tank can be provided inside the main body 30, and oil can be supplied to a tool holder having the injection port 60 formed on the outer peripheral surface of the main body 30.

  In the first embodiment, the oil supply position is set at the top of the rotary member 3b of the tool magazine 3, but the oil supply position is not limited. When the oil supply position is set at the side or lower part of the rotary member 3b, the oil supply device 1A is disposed on the side or below the rotary member 3b in correspondence with the oil supply position.

  The fueling device 1A of the first embodiment is disposed radially outside the tool holder 10. However, when the injection port 60 is provided at the axial end of the tool holder 10, the fueling device 1A is used. It can be disposed axially outside the tool holder 10.

  In the fueling apparatus 1A of the first embodiment, as shown in FIG. 4, the valve mechanism of the supply port 73 and the injection port 60 is configured to be opened by connecting the supply port 73 and the injection port 60. . However, the configuration for connecting the supply port 73 and the injection port 60 is not limited, and various known connection mechanisms and valve mechanisms can be used.

Second Embodiment
Next, a fueling device according to a second embodiment will be described.
The fueling device of the second embodiment has a configuration substantially similar to that of the above-described fueling device 1A (see FIG. 1) of the first embodiment, as shown in FIG. The configuration for detecting the amount of decrease is different.

  In the tool holder 10 of the second embodiment, the magnet 57 is attached to the piston 54 provided in the internal space 51 of the oil tank 50. That is, the magnet 57 moves in the internal space 51 in conjunction with the piston 54.

  The fueling device of the second embodiment is provided with a magnetic sensor 75 facing the outer peripheral surface of the oil tank 50. The magnetic sensor 75 is disposed at the oil supply position, and can detect the magnetic field of the magnet 57 when the tool holder 10 is supplied with oil.

The control unit 90 of the second embodiment detects the amount of movement of the piston 54 in the oil tank 50 based on the magnetic field of the magnet 57.
The control unit 90 stores the magnetic field of the magnet 57 at the position of the piston 54 when the oil tank 50 is sufficiently filled with the oil, and based on the amount of fluctuation from the magnetic field, the control unit 90 The amount of movement of the piston 54 is calculated.
Furthermore, the control unit 90 detects the amount of reduction of the oil in the storage chamber 55 based on the amount of movement of the piston 54 toward the storage chamber 55.

  In the fueling device of the second embodiment, a piston 54 for pressurizing the oil in the oil tank 50 is movably provided in the oil tank 50. Then, based on the movement amount of the piston 54 in the oil tank 50, the control unit 90 detects the reduction amount of the oil in the oil tank 50. In this way, the amount of reduction of the oil in the oil tank 50 can be detected accurately.

  In the fueling device of the second embodiment, the magnetic sensor 75 for detecting the position of the piston 54 is provided, and the magnetic sensor 75 is disposed facing the outer surface of the oil tank 50 disposed on the outer peripheral portion of the tool holder 10. As described above, by disposing the magnetic sensor 75 on the radially outer side of the tool holder 10, the installation space of the magnetic sensor 75 can be easily secured.

  The second embodiment of the present invention has been described above, but the present invention is not limited to the second embodiment, and as in the first embodiment described above, changes can be made as appropriate without departing from the scope of the present invention. It is possible.

Third Embodiment
Next, the fueling device of the third embodiment will be described.
The fueling apparatus 1B according to the third embodiment has substantially the same configuration as the fueling apparatus 1A according to the first embodiment (see FIG. 1) as shown in FIG. The point is different.

In the fueling device 1B of the third embodiment, the connecting portion 70 is disposed in the processing chamber 5 for processing the workpiece W. In the fueling device 1B of the third embodiment, the supply port 73 of the movable member 71 is connected to the injection port 60 of the oil tank 50 of the tool holder 10 in the processing chamber 5.
In the third embodiment, oil is supplied to the oil tank 50 of the tool holder 10 by the oil supply apparatus 1B immediately before the workpiece T is processed by the tool T.

  In the fueling device 1B of the third embodiment, the connecting portion 70 is detachably attached to the injection port of the tool holder 10 disposed in the processing chamber 5 for processing the workpiece W. In this configuration, since it is easy to secure a space for arranging the connecting portion 70 in the processing chamber 5, the degree of freedom in the layout of the fueling device 1B can be enhanced.

  As mentioned above, although 3rd embodiment of this invention was described, this invention is not limited to the said 3rd embodiment, It changes suitably in the range which does not deviate from the meaning similarly to 1st embodiment mentioned above. It is possible.

1A Refueling device (first embodiment)
1B Refueling device (third embodiment)
Reference Signs List 2 spindle 3 tool magazine 3a drive device 3b rotating member 3c tool holder 4 magazine cover 5 processing chamber 10 tool holder 20 fixing portion 30 main body 31 mounting portion 32 support portion 33 fitting portion 35 air flow path 36 first branch flow path 36a first regulator 37 second branch passage 37a second regulator 40 nozzle 50 oil tank 51 internal space 54 piston 55 reservoir 56 pressure chamber 57 magnet 60 injection port 61 valve body 62 valve seat member 70 connecting portion 71 movable member 72 Drive device 73 Supply port 73a Valve body 73b Valve seat member 75 Magnetic sensor 80 Oil supply device 90 Control part T Tool W work

Claims (7)

An oiling apparatus for supplying oil to an oil tank provided in a tool holder attached to a spindle of a machine tool, comprising:
A detachable connection to the injection port leading into the oil tank;
An oil supply device for supplying oil to the connection portion;
And a control unit that controls the connection unit and the oil supply device.
The control unit is configured to connect the connection portion to the injection port and to supply oil to the oil tank from the connection portion when the amount of reduction of oil in the oil tank reaches a set value. Refueling device.   The oil supply apparatus according to claim 1, wherein the control unit detects a reduction amount of oil in the oil tank based on the number of times of use of the tool holder. In the oil tank, a piston for pressurizing the oil in the oil tank is movably provided.
The oil supply device according to claim 1, wherein the control unit detects a reduction amount of oil in the oil tank based on a movement amount of the piston in the oil tank. A sensor for detecting the position of the piston;
The oil supply apparatus according to claim 3, wherein the sensor is disposed to face an outer surface of the oil tank disposed on an outer peripheral portion of the tool holder.   The oil supply device according to any one of claims 1 to 4, wherein the connection portion is detachably attached to the injection port disposed at an outer peripheral portion of the tool holder.   The oil supply device according to any one of claims 1 to 5, wherein the connection portion is detachably attached to the injection port of the tool holder held by a tool magazine.   The oil supply system according to any one of claims 1 to 5, wherein the connection portion is detachably attached to the injection port of the tool holder disposed in a processing chamber for processing a workpiece. apparatus.

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