JPH07276184A - Device and method for feeding coolant - Google Patents

Abstract

PURPOSE:To provide a device for feeding the coolant which dispenses with the positioning adjustment of a cooling nozzle by manual operation, and can cope with an automatic tool changing device. CONSTITUTION:The manual adjustment of the position of a cooling nozzle 16 need not be made when a tool is changed, and the continuous machining is executed by integrating an attachable/detachable cooling nozzle 16 and a tool holder 13 with a spindle head 11 of a machine tool 18 by a holding member 18.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling liquid supplying apparatus and a supplying method which can accurately supply a cooling liquid to a processing point of a workpiece in cutting or grinding.

[0002]

2. Description of the Related Art Generally, in cutting or grinding, a cooling liquid (cooling liquid) is supplied to a processing point of a workpiece in order to prevent generation of heat during cutting or grinding and to remove chips. There is.

Conventionally, in a conventional milling machine, NC milling machine, grinding machine, machining center, etc., a method using a universal joint type cooling nozzle in which a plurality of hollow nozzle pieces each having a trapezoidal cross section are connected (see FIG. 8) The cooling liquid is supplied to the processing point of the workpiece by a through-hole method in which a hole through which the cooling liquid passes is provided (see FIG. 9) or a method of using a copper pipe.

FIG. 8 is a diagram showing a method of supplying a cooling liquid by a cooling nozzle of a universal joint system, and is a diagram showing an example in a cutting process by a milling machine.

In the figure, reference numeral 1 is a machine tool spindle head (hereinafter referred to as spindle head), and a tool holder 3 for holding a tool 2 such as an end mill is detachably attached to the spindle head 1 for work. A workpiece (hereinafter referred to as a workpiece) 5 on the table 4 is cut. Spindle head during cutting
The cooling liquid 7 is supplied to the machining point of the workpiece 5 from the discharge port 6a of the cooling nozzle 6 of the universal joint system in which a plurality of hollow nozzle pieces with a trapezoidal cross section connected to the cooling liquid supply unit 1a of 1 are connected. Generation of heat in the tool 2 and the work 5 is prevented and chips are removed. When supplying the cooling liquid 7, the direction of the discharge port 6a of the cooling nozzle 6 is positioned at the processing point of the workpiece 5 while the cooling liquid 7 is discharged manually by the operator. Further, since the cooling nozzle 6 has flexibility but does not have restorability, the direction of the cooling nozzle 6 positioned as described above is maintained constant during processing.

Even in the grinding process using a grindstone in a grinder, the cooling liquid 6 is supplied by the cooling nozzle 6 in the same manner to prevent heat generation and remove chips.

Further, FIG. 9 is a diagram showing a method of supplying a cooling liquid by a through hole system, FIG. 9 (a) is a diagram showing a through hole type tool, and FIG. 9 (b) is an example of cutting by a milling machine. FIG.

In the figure, 8 is a through hole type tool such as an end mill in which a cooling liquid supply hole 9 through which the cooling liquid 7 passes is formed. The through hole type tool 8 is a spindle head.
Coolant similar to thru-hole tool 8 mounted on 1
It is held by a tool holder 10 in which a hole through which 7 passes is formed and cuts a work 5 on a workbench 4. Tool holder
10 During this cutting process, the coolant 7 is supplied from the spindle head 1 to the through-hole type tool 8 via the tool holder 10, and the coolant 7 is discharged from the coolant supply hole 9 to the machining point of the workpiece 5. To be done.

[0009]

By the way, in recent years of high-speed cutting technology and high-pressure coolant supply cutting, a large amount of coolant 7 is applied at the machining point, that is, the contact point (cutting point) between the tool 2 and the workpiece 5. If it is not discharged, it will cause heat generation and insufficient chip discharge, which will affect the machining accuracy and tool life, so position the coolant discharge position at the machining point so that the coolant 7 can be accurately discharged to the machining point. It is necessary to do.

However, in the method of supplying the cooling liquid 7 by the cooling nozzle 6 or the copper pipe described above, in order to accurately discharge and supply the cooling liquid 7 to the machining point of the work 5, the spindle head 1
It is necessary to adjust the direction of the cooling nozzle 6 or the discharge port 6a of the copper pipe to the machining point manually in accordance with the tool 2 that is mounted on the work piece 5, and also the position of the cooling nozzle 6 and the copper pipe. Depending on the situation, there is a problem that the automatic tool change may be a hindrance to the tool change, which is an obstacle to continuous machining due to the automatic tool change.

The cooling nozzle 6 described above can flexibly change the length of the nozzle itself and the discharging direction of the cooling liquid 7, but since the bending point is hard, the cooling liquid 7 must be actually discharged. There is a problem that it is not possible to confirm whether or not the ejection position is correct.

Further, since the discharge direction of the cooling liquid 7 from the cooling nozzle 6 is maintained in a constant direction during the processing, there is a problem that the processing point is behind the workpiece 5 and the cooling liquid 7 is not directly discharged to the processing point. there were.

Further, the above-mentioned method of supplying the cooling liquid 7 by the through-hole type tool 8 does not have the above-mentioned problem, but a mechanism for flowing the cooling liquid 7 to the spindle head 1 and the tool holder 10 must be provided. However, there is a problem that existing ones cannot handle it.
Since the cooling liquid supply hole 9 must be formed in 8,
There was a problem that a small-diameter through-hole tool 8 could not be manufactured.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a cooling liquid supply device which does not require manual positioning adjustment of the cooling nozzle and can be applied to an automatic tool changing device. And

Another object of the present invention is to provide a cooling liquid supply device which facilitates positioning of the cooling nozzle when manually adjusting the positioning of the cooling nozzle.

[0016]

In order to achieve the above-mentioned object, the present invention is to machine a machine tool spindle head having a coolant supply portion and a work piece which is detachably attached to the machine tool spindle head. A tool holder for holding a tool, a cooling liquid nozzle detachably connected to the cooling liquid supply unit of the machine tool spindle head and having a discharge port for discharging the cooling liquid to the processing point of the workpiece, and the cooling nozzle. The present invention is characterized by further comprising a holding member which holds the cooling nozzle and the tool holder so as to be held and attached to the tool holder so as to be positionally adjustable.

Further, the cooling liquid supply apparatus of the present invention is characterized in that the discharge port is adjusted in advance to a position for supplying the cooling liquid to the processing point of the workpiece.

The present invention also provides a machine tool spindle head having a cooling liquid supply section, a tool holder detachably attached to the machine tool spindle head for holding a tool for machining a workpiece, and the machine tool spindle. A cooling nozzle that is connected to the cooling liquid supply part of the head and has a discharge port that discharges the cooling liquid to the processing point of the workpiece, and the vicinity of the tip of this cooling nozzle is held so that the discharge port can be oriented in any direction. Holding means, detection means attached to the vicinity of the tip of the cooling nozzle to detect the processing point of the workpiece, and the holding means is controlled based on the detection output of the detection means to control the discharge port And a control means for directing it to a processing point of the workpiece.

Further, the cooling liquid supply apparatus of the present invention is characterized in that the detecting means is a sound sensor for detecting a processing sound to detect a processing point.

Further, the cooling liquid supply apparatus of the present invention is characterized in that the detecting means is a temperature sensor for detecting the temperature of the workpiece to detect the processing point.

Further, the cooling liquid supply apparatus of the present invention is characterized in that the detecting means is an image processing means for image-processing the processing state of the workpiece to detect the processing point.

Further, the cooling liquid supply apparatus of the present invention is characterized in that the holding means is a robot.

Further, the cooling liquid supply apparatus of the present invention is characterized in that the holding means is a positioning table.

The present invention also provides a machine tool spindle head having a coolant supply section, a tool holder detachably attached to the machine tool spindle head for holding a tool for machining a workpiece, and the machine tool spindle. A cooling nozzle connected to a cooling liquid supply unit of the head and having a discharge port for discharging the cooling liquid to a processing point of the workpiece, and a trajectory of the light beam that emits a light beam and is substantially coincident with a discharge trajectory of the cooling liquid And an irradiation means for adjusting the discharge position of the cooling liquid of the discharge port by irradiating a light beam to the preset processing point from the tip of the cooling nozzle. Is characterized by.

Further, in the cooling liquid supply apparatus of the present invention, the irradiation means includes a laser light oscillation source that emits laser light, and an optical cable that guides the laser light emitted from this laser light oscillation source to the tip of the cooling nozzle. Is provided.

Further, the cooling liquid supply apparatus of the present invention is characterized in that the irradiation means comprises a light source for emitting diffused light and an optical lens for collimating the diffused light emitted from the light source. .

Further, the cooling liquid supply apparatus of the present invention is characterized in that the irradiation means is a lamp and a power source for driving the lamp.

Further, the cooling liquid supply apparatus of the present invention is characterized in that the irradiation means is a pen type light source.

The present invention also provides a machine tool spindle head having a coolant supply section, a tool holder detachably attached to the machine tool spindle head for holding a tool for machining a workpiece, and the machine tool spindle. A cooling liquid supply method for supplying a cooling liquid to a processing point of a workpiece, comprising a cooling nozzle connected to a cooling liquid supply unit of a head and having a discharge port for discharging the cooling liquid to a processing point of the workpiece. , Irradiating the light beam from the irradiation means attached to the cooling nozzle so that the light beam is emitted and the locus of the light beam substantially coincides with the ejection path of the cooling liquid. And an adjusting step of adjusting the cooling liquid discharge position of the discharge port of the cooling nozzle based on the detection result of the optical sensor.

Further, according to the present invention, a machine tool spindle head having a coolant supply section, a tool holder detachably attached to the machine tool spindle head for holding a tool for machining a workpiece, and the machine tool spindle. A cooling nozzle connected to the cooling liquid supply unit of the head and supplying cooling liquid to the processing point of the workpiece,
A positioning member that is detachably attached to the tip of the cooling nozzle and positions the discharge position of the cooling liquid supplied from the cooling nozzle at the processing point of the workpiece, and the positioning member that is detachably attached to the tip of the cooling nozzle. The present invention is characterized by including a discharge member that discharges the cooling liquid to the discharge position positioned by the positioning member, and a mounting member that selectively attaches the positioning member and the discharge member to the tip of the cooling nozzle.

[0031]

In the cooling liquid supply apparatus of the present invention, the removable cooling nozzle and the tool holder are integrated with the machine tool spindle head by the holding member, so that it is necessary to manually adjust the position of the cooling nozzle when changing the tool. Is eliminated and continuous processing becomes possible.

Further, in the cooling liquid supply apparatus of the present invention, since the discharge port is adjusted in advance to the position for supplying the cooling liquid to the processing point of the workpiece, the position of the cooling nozzle is changed during processing or when changing the tool. Eliminates the need to manually adjust

Further, in the cooling liquid supply apparatus of the present invention, the control means discharges the holding means for holding the discharge port of the cooling nozzle so that it can be oriented in any direction based on the detection output of the detection means for detecting the processing point. Since the outlet is controlled so that it is directed to the processing point, the position of the cooling nozzle discharge port is automatically determined, and the position adjustment of the cooling nozzle discharge port is automated, eliminating the need for manual adjustment. It is possible to save labor.

Further, in the cooling liquid supply apparatus of the present invention, since the detecting means is the sound sensor or the temperature sensor, the processing point of the workpiece can be detected with a simple structure.

Further, in the cooling liquid supply apparatus of the present invention, since the detecting means is the image processing means, it becomes possible to accurately detect the processing point of the workpiece.

Further, in the cooling liquid supply apparatus of the present invention, since the holding means is a robot, it becomes possible to discharge the cooling liquid from the proper direction, and the cooling nozzle becomes an obstacle to the tool replacement when the tool is replaced. It is possible to evacuate to a position where it does not become.

Further, in the cooling liquid supply apparatus of the present invention, since the holding means is the positioning table, the position adjustment of the discharge port of the cooling nozzle can be automated with a simple and inexpensive structure.

Further, since the cooling liquid supply device of the present invention adjusts the cooling liquid discharge position of the discharge port by irradiating the preset processing point with the light beam emitted from the irradiation means, the cooling liquid is actually used. It is possible to easily and accurately determine the cooling liquid discharge position of the discharge port without discharging the coolant.

Further, in the cooling liquid supply device of the present invention, the irradiation means is a laser light oscillation source and an optical cable, a light source for emitting diffused light, an optical lens for collimating the diffused light, a lamp and a power source for driving the lamp, Alternatively, since the pen-type light source is used, it is possible to determine the cooling liquid discharge position of the discharge port with a simple configuration.

Further, the cooling liquid supply method of the present invention includes an irradiation step of irradiating a light beam from an irradiation means to an optical sensor installed at a processing point of a workpiece, and a cooling nozzle of the cooling nozzle based on a detection result of the optical sensor. Since the configuration is provided with an adjusting step of adjusting the cooling liquid discharge position of the discharge port, it is possible to easily and accurately determine the cooling liquid discharge position of the discharge port without actually discharging the cooling liquid. Become.

Further, in the cooling liquid supply apparatus of the present invention, the positioning member for positioning the discharging position of the cooling liquid at the processing point and the discharging member for discharging the cooling liquid to the discharging position positioned by the positioning member are mounted by the mounting member. Since the configuration is selectively attached to the tip of the cooling nozzle, it is possible to determine the ejection position of the ejection port and eject the cooling liquid to the ejection position with a simple configuration without actually ejecting the cooling liquid. .

[0042]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a diagram showing a cooling liquid supply apparatus according to a first embodiment of the present invention, and FIG. 1 (a) is a diagram showing its configuration.
FIG. 1B is a diagram showing a main part thereof, FIG. 1C is a diagram showing attachment / detachment of a tool, and FIG. 1D is a diagram showing tool exchange.
Is a diagram showing an outline of the second embodiment of the present invention, FIG. 3 is a diagram showing another embodiment of the second embodiment of the present invention, and FIG. 4 is a diagram showing the outline of the third embodiment of the present invention. 5 and 5 are views showing another embodiment of the third embodiment of the present invention, FIG. 5 (a) is a view showing a first other embodiment, and FIG. 5 (b) is a second other embodiment. FIG. 5 (c) is a view showing a third other embodiment, FIG. 6 is a view showing an outline of a fourth embodiment of the present invention, and FIG.
FIG. 8 is a diagram showing an outline of a fifth embodiment of the present invention.

In FIG. 1, reference numeral 11 denotes a machine tool spindle head (hereinafter referred to as spindle head), on which a tool holder 13 for holding a tool 12, such as an end mill, is plugged at its head 13a. Can be attached and removed freely,
Workpiece on the workbench 14 with the tool 12 (hereinafter referred to as a work)
Cut 15 Further, 16 is a cooling nozzle of a universal joint system in which a plurality of hollow nozzle pieces 16a having a trapezoidal cross section made of synthetic resin are connected, and a nozzle connecting portion 16b is provided at one end of the cooling nozzle 16. This nozzle connecting portion 16b is provided on the spindle head 11 so that the cooling liquid 17 does not leak to the cooling liquid pipe 11a which communicates with the cooling liquid pump (not shown) which supplies the cooling liquid 17 from the cooling liquid source (not shown). It is detachable by a plug method on the spindle head connection part 11b connected to the cooling nozzle 16, while the discharge port 16c is provided on the other end of the cooling nozzle 16.
Is formed, and the cooling liquid 17 is discharged from the discharge port 16c to the processing point of the work 15. By discharging the cooling liquid 17 to the processing point, heat generation in the tool 12 and the work 15 is prevented and chips are removed, so that the processing accuracy can be improved and stabilized, and the life of the tool 12 can be extended.

Reference numeral 18 is a holding member which is composed of first and second ring-shaped holding portions 18a and 18b made of metal, and which connects the tool holder 13 and the cooling nozzle 16 to each other and integrates them.
The first holding portion 18a holds the cooling nozzle 16 by fixing the outer periphery of the nozzle piece 16a at an appropriate position according to the type of the tool 12,
The second holding portion 18b is attached to the tool holder 13 so as not to move in the vertical direction and has a ball bearing or the like so as to be rotatably attached to the tool holder 13, and the attachment position is adjustable on the outer periphery of the tool holder 13. Has become. Further, the cooling nozzle 16 integrally connected to the tool holder 13 is a kind of the tool holder 13, that is, the tool holder 13
Corresponding to the type of tool 12 that can be attached to the discharge port 16c
The discharge direction of the cooling liquid 17 is adjusted in advance at the processing point of the workpiece 15, and the cooling nozzle 16 has flexibility, but does not have resilience, so positioning is performed as described above. The direction of the discharge port 16c of the cooling nozzle 16 thus maintained is maintained in the preset direction until the next positioning adjustment is performed.

When the tool 12 is replaced, the V-shaped tip 20a of the tool changing arm 20 screwed with the ball screw 19 is engaged with the engaging groove formed in the tool holder 13. By rotating the ball screw 19 by engaging with 13b, the tool holder 13 is inserted or removed from the spindle head 11 as the arm 20 moves up or down, and the tool 12 is replaced.

That is, the ball screw 19 is connected to a drive source rotatable in both directions.
When the tool holder 13 is pulled out from the spindle head 11, the ball screw 19 rotates in the A direction to engage when the tool holder 13 is pulled out. The tool holder 13 engaged with the tip portion 20a of the arm 20 in the groove 13b descends as the arm 20 descends, is separated from the spindle head 11, and is withdrawn. At this time, the nozzle connecting portion 16 inserted into the spindle head connecting portion 11b
b is also detached from the spindle head connecting portion 11b and pulled out. The pulled-out tool holder 13 is set in the tool presetter 22 by a manual operation by the worker 21.

Then, the tool presetter 22 is manually operated.
The tool holder 13 holding the specified tool 12 selected from is set on the tip 20a of the arm 20, and the ball screw
When 19 rotates in the B direction, the tool holder 13 rises as the arm 20 rises, and the head 13a of the tool holder 13 is inserted into the spindle head 11 and finally inserted and held in the spindle head 11. It At this time, the nozzle connecting part 16b is also connected to the spindle head connecting part 11b.
The cooling nozzle 16 is held by the spindle head 11.

Next, the operation of the cooling liquid supply device having the above structure will be described.

First, the specified tool 12 from the tool presetter 22.
The tool holder 13 holding is selected, and the tip of the arm 20 is inserted into the engaging groove 13b of the selected tool holder 13.
20a is engaged. The arm 20 rises as the ball screw 19 rotates in the B direction, and the selected tool holder 13 is inserted and held on the spindle head 11. At this time, the cooling nozzle 16
The nozzle connection portion 16b of is also inserted and held in the spindle head connection portion 11b, and the cooling liquid 17 can be supplied to the machining point of the workpiece 15.

After inserting / holding the tool holder 13 and the nozzle connecting portion 16b into the spindle head 11, the spindle for holding the tool holder 13 in the spindle head 11 is rotated by a machining start command to the spindle head 11, and the workpiece is rotated. Processing of 15, for example, cutting processing is started. With the start of rotation of the main shaft, the coolant pump also starts to rotate,
The cooling liquid 17 is supplied to the cooling nozzle 16 via the cooling liquid pipe 11a, and the discharge port 16c in which the discharge direction is set in advance at the processing point.
The cooling liquid 17 is discharged from the processing point to the processing point. Therefore, work 15
The coolant 17 is supplied to the processing point of the work 15 while cutting the workpiece.

In the above embodiment, the extracted tool holder 13 is set in the tool presetter 22, the designated tool holder 13 is selected, and the arm 20 of the selected tool holder 13 is set.
Although it is configured to be manually set by the worker 21, the ball screw 19 and the arm 20 may be robotized to automate the above work by the robot, and continuous processing can be realized by automation. .

As described above, according to the first embodiment of the present invention, the cooling nozzle 16 and the tool holder 13 which are detachable from the spindle head 11 are integrated by the holding member 18, and the discharge port of the cooling nozzle 16 is integrated. 16c is the coolant 17
Since it is adjusted to the position where the cooling nozzle 16 is supplied, there is no need to manually adjust the position of the cooling nozzle 16 during machining or when changing tools, and by automating the tool change, continuous machining is possible. Moreover, the existing tool can be used without the need for a dedicated tool, tool holder, and machine tool.

Next, a second embodiment of the present invention will be described with reference to FIGS. A part of the spindle head and the workbench are omitted because they are the same as in FIG.

In FIG. 2, 31 is a spindle head, and this spindle head
A tool holder 33 for holding a tool 32 such as an end mill is detachably attached to the head 31 at its head 33a by a plug method, and the work 32 on the workbench is cut by the tool 32. Reference numeral 35 denotes a universal joint cooling nozzle in which a plurality of hollow trapezoidal nozzle pieces 35a made of synthetic resin are connected, and one end of this cooling nozzle 35 has a spindle head 31a.
The cooling liquid source (not shown) provided in the unit is detachably connected to the cooling liquid pipe (not shown) that supplies the cooling liquid 36 so that the cooling liquid 36 does not leak. On the other hand, a discharge port 35b is formed at the other end of the cooling nozzle 35.
It faces the machining point 34a so as to discharge the cooling liquid 36 to a. By discharging the cooling liquid 36 to the machining point 34a, heat is prevented from being generated in the tool 32 and the work 34 and chips are removed, so that machining accuracy can be improved and stabilized, and the life of the tool 32 can be extended.

The tip of the cooling nozzle 35 near the discharge port 35b is fixed by, for example, a fixing member 38 held at the tip of the robot arm 37.
The discharge direction of the discharge port 35b can be set to an arbitrary direction according to the operation of. In addition, the machining point of the work 34 is fixed to the fixing member 38.
A sensor for detecting 34a, for example, a sound sensor 39 for detecting a processing sound to detect a processing point 34a is attached, and the output of the sound sensor 39 is output to the control unit 40. Control unit 40
Is the sound data detected by the CPU and sound sensor 39 and the discharge port
It consists of a RAM that stores the position information of 35b, a ROM that stores a program that determines the maximum processing sound among the processing sounds detected by the sound sensor 39, and the like.
When the control signal for scanning the robot arm 37 in three directions orthogonal to each other to search for the maximum processing sound, that is, the three-dimensional direction, and the position of the maximum processing sound are determined, the ejection port 35b is moved according to the position information. A control signal for moving the robot arm 37 to direct it to the processing point 34a is output to the robot 41. The robot 41 controls the scanning or moving operation of the robot arm 37 based on the input control signal. As a result of this control, the discharge port 35b is activated by the operation of the robot arm 37 controlled by the control unit 40.
The discharge direction of the cooling liquid 36 is accurately oriented and positioned in the direction of the processing point 34a.

Next, the operation of the cooling liquid supply device having the above structure will be described.

Spindle head 31 of tool holder 33 and cooling nozzle 35
After the insertion and attachment to the spindle head 31, the spindle for holding the tool holder 33 in the spindle head 31 is rotated by the machining command to the spindle head 31, and the machining of the work 34, for example, the cutting machining is started. When the main shaft starts rotating, the coolant pump also starts rotating,
Is supplied to the cooling nozzle 35 via the cooling liquid pipe.

When the tool 32 starts cutting the work 34, the processing sound at the processing point 34a is input to and detected by the sound sensor 39, and the sound sensor 39 among the programs stored in the ROM of the control unit 40 detects the sound. A program for determining the maximum processing sound among the detected processing sounds is started. According to this maximum processing sound determination program, first, the robot arm 37 is scanned in the first direction, for example, the X direction, the processing sensors at the plurality of measurement points detect the processing sounds, and the sound data at those positions and the sound data are emitted. The position information of the exit 35b is stored in the RAM of the control unit 40. When the measurement of the processing sound in the X direction is completed, the CPU of the control unit 40 extracts the maximum processing sound data from the sound data stored in the RAM, and X
The position information of the position that emits the maximum processing sound in the direction is determined.

Then, similarly, in the second and third directions,
That is, the robot arm 37 is scanned in the Y direction and the Z direction, and the position information of the position at which the maximum machining sound is emitted in the Y direction and the Z direction is determined.

X, Y, and Z determined as above
Based on the position information of the position where the maximum processing sound is generated in the three directions, the ejection position of the ejection port 35b is determined, and the movement of the robot arm 37 is controlled to install the ejection port 35b at the ejection position.

When the discharge port 35b is positioned at the discharge position, the cooling liquid pump starts to rotate, the cooling liquid 36 is supplied to the cooling nozzle 35 through the cooling liquid pipe, and the cooling liquid 36 is processed from the discharging port 35b. Discharge to point 34a.

As described above, according to the second embodiment of the present invention, the sound sensor 39 for detecting the processing sound is attached to the fixing member 38 near the tip of the cooling nozzle 35, and the processing sound is sensed. By detecting the point 34a and automatically controlling the tip of the cooling nozzle 35 by the robot 41, the discharge port 35b can be accurately and automatically positioned at the discharge position of the cooling liquid 36. Cooling nozzle that was manually done
It is possible to automate the positioning of 35 and save labor.

Further, by accurately discharging the cooling liquid 36 to the processing point 34a of the work 34, it is possible to improve and stabilize the processing accuracy and extend the life of the tool 32.

Further, conventionally, the cooling liquid 36 can be discharged only in one direction by the fixed cooling nozzle 35, but by using the robot arm 37 of the robot 41, the cooling liquid 36 can be discharged from the proper direction. Is possible.

Further, by using the robot arm 37 of the robot 41, it becomes possible to retract the cooling nozzle 35 to a position that does not hinder the tool replacement when the tool is replaced in the machining center.

In the above embodiment, the robot arm 37 of the robot 41 is used to hold the ejection port 35a for positioning, but as shown in FIG.
Instead of this, the positioning table 42 may be used to position the ejection port 35a. FIG. 3 is a diagram showing a simplified main part. A drive for moving the control unit 40 for positioning the discharge port 35a shown in FIG. 2, a part of the cooling nozzle 35, and the positioning table 42 in the XY directions. Illustration of parts and the like is omitted.

In the figure, the positioning table 42 has two
Mounted on the drive unit such as the air cylinder of the table, XY
From a horizontal table portion 43 that is movable in the direction, and a vertical table portion 44 that is erected on the horizontal table portion 43 and that holds the cooling nozzle 35 movably in the vertical direction (Z direction) with a timing belt or the like at approximately the center. The sound sensor 39 for detecting the processing point 34a of the work 34 is attached to the tip of the cooling nozzle 35 held by the vertical table 44 by the fixing member 45.

Since the positioning table 42 holds the cooling nozzle 35 and is movable in the three-dimensional directions of XYZ, the sound sensor 39 is scanned in the three-dimensional direction and the same as in the second embodiment. In addition, the discharge position of the discharge port 35b for discharging the cooling liquid 36 is accurately positioned by the control of the control unit (not shown).

By applying the above-mentioned positioning table 42, the discharge position of the discharge port 35b can be positioned similarly to the second embodiment, and the discharge port of the cooling nozzle 35 can be constructed with a simple and inexpensive structure. It is possible to automate the position adjustment of 35b.

Further, in the above embodiment, the sound sensor 39 detects the processing point 34a.
Alternatively, the processing point 34a may be detected by a temperature sensor, and like the sound sensor 39, the processing point 34a of the work 34 can be detected with a simple configuration.

Further, instead of the sound sensor 39, the processing point 34a may be detected by image processing means,
By applying the image processing means, the processing point of the work 34
It is possible to detect 34a with high accuracy.

Next, a third embodiment of the present invention will be described with reference to FIGS. In addition, a part of the spindle head,
The work, the cooling liquid, and the workbench are not shown because they are the same as in FIG.

In FIG. 4, 51 is a spindle head, and this spindle head
A tool holder 53, which holds a tool 52 such as an end mill, is detachably attached to the head 51 at its head portion 53a by a plug method, and the work on the workbench is cut by the tool 52. Further, 54 is a cooling nozzle of a universal joint system in which a plurality of hollow trapezoidal nozzle pieces 54a made of synthetic resin are connected, and one end of this cooling nozzle 54 is a cooling liquid source provided on the spindle head 51. The cooling liquid is connected to the cooling liquid pump that supplies the cooling liquid from the cooling liquid pipe to the cooling liquid pipe so that the cooling liquid does not leak, while the cooling nozzle 54 has a discharge port 54b at the other end. This discharge port 54
b faces the machining point so as to discharge the cooling liquid to the machining point of the workpiece. By discharging the cooling liquid to the processing point, the tool 52
Also, the generation of heat in the work is prevented and the chips are removed, so that the machining accuracy can be improved and stabilized, and the life of the tool 52 can be extended.

Further, 55 is a laser light oscillation source that emits laser light, and the laser light emitted from this laser light oscillation source 55.
55a is the discharge port at the tip of the cooling nozzle 54 by the optical cable 56.
54b from the tip of the cooling nozzle 54 to the tool 5
Irradiation is applied to a machining point 52a which is set in advance at the tip of the No.2. Further, the optical cable 56 is attached to the cooling nozzle 54 so that the optical path of the laser beam 55a emitted from the tip of the cooling nozzle 54 substantially coincides with the discharging path of the cooling liquid discharged from the discharge port 54b of the cooling nozzle 54. Has been.

Therefore, since the light locus of the laser light 55a is set so as to substantially coincide with the discharge locus of the cooling liquid, by irradiating the machining point 52a of the tool 52 with the laser light 55a, the discharge port 54b is cooled. The discharge position for discharging the liquid is the processing point 52.
Positioned at a.

Next, the operation of the cooling liquid supply device having the above structure will be described.

Prior to cutting with the tool 52, the discharge port
Positioning of 54b is performed.

That is, the laser light oscillation source 55 is turned on,
The laser light 55a emitted from the laser light oscillation source 55 is guided by the optical cable 56 to the vicinity of the discharge port 54b at the tip of the cooling nozzle 54, and then emitted toward the tool 52. The cooling nozzle 54 is manually operated by an operator or automatically operated by a robot so that the laser beam 55a emitted toward the tool 52 irradiates the processing point 52a of the tool 52.
Is positioned and adjusted. Laser beam 55a is the processing point
When it is positioned at the irradiation position of 52a, the cooling liquid discharged from the discharge port 54b is the processing point at this positioned position.
It is also the position to be discharged to 52a, and the positioning of the discharge port 54b is completed. Further, since the cooling nozzle 54 has flexibility but does not have restorability, the discharge port 54b of the cooling nozzle 54 positioned as described above is positioned during cutting by the tool 52. Maintained in a closed position.

When the positioning of the discharge port 54b is completed, the machining instruction to the spindle head 51 causes the tool holder 53 in the spindle head 51 to be processed.
The spindle that holds is rotated, and the cutting of the workpiece is started. When the main shaft starts rotating, the cooling liquid pump also starts rotating, the cooling liquid is supplied to the cooling nozzle 54 through the cooling liquid pipe, and the machining point of the tool 52 is discharged from the discharge port 54b of the cooling nozzle 54.
Coolant is discharged to 52a.

As described above, the laser light 55a emitted from the laser light oscillation source 55 is applied to the preset machining point 52a of the tool 52 to adjust the cooling liquid discharge position of the discharge port 54b. Discharge port 54 without actually discharging the liquid
The cooling liquid discharge position of b can be positioned easily and accurately, and the conventional work of cooling liquid discharge → confirming the discharge position → adjusting the discharge direction → cooling liquid discharge is not required・ The adjustment time can be shortened.

In the above embodiment, the laser light oscillation source 55
Although the laser beam 55a emitted from the laser beam is applied to the machining point 52a of the tool 52, as shown in FIG. 5A, the diffused light source 57 is provided at the tip of the cooling nozzle 54 and the diffused light source 57 An optical lens 58 for collimating the diffused light radiated from the optical lens 58 is provided, and the light beam 59 collimated by the optical lens 58 is applied to the preset machining point 52a of the tool 52 to eject the discharge port 54b.
The cooling liquid discharge position may be positioned and adjusted. Alternatively, as shown in FIG. 5B, the lamp 60 is provided at the tip of the cooling nozzle 54, and the lamp 60 is driven by the power supply 61 that is separately installed.
Tool preset with light beam 62 emitted from 60
The machining point 52a of 52 may be irradiated to position and adjust the cooling liquid discharge position of the discharge port 54b. Alternatively, as shown in FIG. 5C, a pen-type light source 63 is attached to the cooling nozzle 54, and a light beam 64 emitted from the pen-type light source 63 is preset to a machining point of the tool 52.
52a may be irradiated to position and adjust the cooling liquid discharge position of the discharge port 54b. In any case, the same action and effect as in the case of irradiating the machining point 52a of the tool 52 with the laser light 55a emitted from the laser light oscillation source 55 is obtained.

Next, a fourth embodiment of the present invention will be described with reference to FIG. In addition, part of the spindle head, work, cooling liquid,
The workbench is the same as that shown in FIG.

In FIG. 6, 71 is a spindle head, and this spindle head
A tool holder 73 for holding a tool 72, such as an end mill, is detachably attached to the 71 at its head 73a by a plug method, and the work on the workbench is cut by the tool 72. Further, 74 is a cooling nozzle of a universal joint system in which a plurality of hollow trapezoidal nozzle pieces 74a made of synthetic resin are connected, and one end of this cooling nozzle 74 is a cooling liquid source provided on the spindle head 71. Is connected to a cooling liquid pipe that communicates with a cooling liquid pump that supplies cooling liquid so that the cooling liquid does not leak, and on the other hand, a discharge port 74b is formed at the other end of the cooling nozzle 74. This outlet 74
b faces the machining point so as to discharge the cooling liquid to the machining point of the workpiece. By discharging the cooling liquid to the processing point, the tool 72
Also, the generation of heat in the work is prevented and the chips are removed, so that the machining accuracy can be improved and stabilized, and the life of the tool 72 can be extended.

Reference numeral 75 denotes a laser light oscillation source which emits laser light, and the laser light emitted from this laser light oscillation source 75.
75a is the discharge port at the tip of the cooling nozzle 74 by the optical cable 76.
It is guided to the vicinity of 74b, and from the tip of the cooling nozzle 74 to the tool 7
Optical sensor 77, which consists of a photodiode, for example, is installed at the preset processing point at the tip of 2
Is irradiated. Further, the optical cable 76 is attached to the cooling nozzle 74 so that the optical path of the laser light 75a emitted from the tip of the cooling nozzle 74 substantially coincides with the ejection path of the cooling liquid ejected from the ejection port 74b of the cooling nozzle 74. Has been.
In other words, since the light path of the laser light 75a is set to substantially match the discharge path of the cooling liquid, by irradiating the optical sensor 77 installed on the tool 72 with the laser light 75a, the discharge port 74b The processing point is the discharge position for discharging the cooling liquid.
Positioned at 72a.

The output of the optical sensor 77 is CPU, RA
Control unit including M, ROM, and multiple display elements
The signal is output to 78, and the control unit 78 displays the level of the magnitude of the received light signal by the plurality of display elements according to the magnitude of the received light signal.

Next, the operation of the cooling liquid supply device having the above structure will be described.

Prior to cutting with the tool 72, the discharge port
Positioning of 74b is performed.

That is, the laser light oscillation source 75 is turned on,
The laser light 75a emitted from the laser light oscillation source 75 is guided to the vicinity of the discharge port 74b at the tip of the cooling nozzle 74 by the optical cable 76, and is emitted to the optical sensor 77 installed in the tool 72. At this time, when the laser light 75a is applied to the optical sensor 77, a light reception signal is output from the light sensor 77 to the control unit 78, and the magnitude of the light reception signal is controlled by the control unit 78.
The level is displayed by a plurality of display elements. (Irradiation step).

The operator adjusts the irradiation position of the laser beam 75a to the position where the level display is maximized, while monitoring the level display of the received light signal by the control unit 78. When the position where the level display is maximum is irradiated with the laser beam 75a, this position is also the position where the cooling liquid discharged from the discharge port 54b is discharged to the processing point 52a, and the positioning of the discharge port 54b is completed. Further, since the cooling nozzle 54 has flexibility but does not have restorability, the discharge port 54b of the cooling nozzle 54 positioned as described above is positioned during cutting by the tool 52. Maintained in a closed position. (Adjustment process).

When the positioning of the discharge port 54b is completed, the optical sensor 77 is removed from the tool 72, and after the removal of the optical sensor 77, the tool holder 73 in the spindle head 71 is held by a machining command to the spindle head 71. The spindle rotates and the cutting work of the work is started. When the main shaft starts rotating, the cooling liquid pump also starts rotating, and the cooling liquid is supplied to the cooling nozzle 74 via the cooling liquid pipe, and the tool is discharged from the discharge port 74b of the cooling nozzle 74.
Coolant is discharged to the processing point 72a of 72. (Processing process).

As described above, the laser light 75a emitted from the laser light oscillation source 75 is applied to the optical sensor 77 previously set at the processing point of the tool 72 to adjust the cooling liquid discharge position of the discharge port 74b. Therefore, it is possible to easily and accurately position the cooling liquid discharge position of the discharge port 74b without actually discharging the cooling liquid, and in addition to the conventional cooling liquid discharge → confirming the discharge position → discharging direction The operation of adjusting → discharging the cooling liquid is unnecessary, and positioning and adjustment time can be shortened.

In the above embodiment, the irradiation position of the laser beam 75a is adjusted manually by the operator. However, a robot is applied and the controller 78 outputs a signal corresponding to the magnitude of the received light signal. May be output to the robot, and the irradiation position of the laser light 75a may be adjusted by the robot.
The irradiation position of 75a is automatically adjusted, and the adjustment process can be automated.

Next, a fifth embodiment of the present invention will be described with reference to FIG. In addition, part of the spindle head, work, cooling liquid,
The workbench is the same as that shown in FIG.

In FIG. 7, reference numeral 81 is a spindle head.
A tool holder 83 for holding a tool 82 such as an end mill is detachably attached to the 81 by a plug method at its head portion 83a, and the work on the workbench is cut by the tool 82. Further, reference numeral 84 is a universal joint type cooling nozzle in which a plurality of hollow nozzle pieces 84a made of synthetic resin and having a trapezoidal cross section are connected. One end of the cooling nozzle 74 is a cooling liquid source provided on the spindle head 81. It is detachably connected to a cooling liquid pipe communicating with a cooling liquid pump that supplies the cooling liquid so that the cooling liquid does not leak. On the other hand, on the peripheral edge of the tip of the other end of the cooling nozzle 84, a positioning member 85 for positioning the discharge position of the cooling liquid supplied from the cooling nozzle 84,
A discharge member 86 for discharging the cooling liquid is selectively attached to the discharge position positioned by the positioning member 85,
A mounting member 87 made of, for example, a magnet is arranged, and a plurality of holes 87a for positioning at the time of mounting are formed in this mounting member 87.

The positioning member 85 is made of a synthetic resin and formed in a funnel shape. At its bottom, a metal suction member 85a sucked by the mounting member 87 engages with the positioning hole 87a of the mounting member 87. It is provided with a pin 85b. The positioning member 85 is attached to the tip of the cooling nozzle 84 by engaging the engaging pin 85b with the positioning hole 87a and causing the suction member 85a to be sucked by the mounting member 87, and in this attached state, the tip 85c thereof is attached. The discharge position of the cooling liquid is positioned by bringing the tip of the tool 82 into contact with a preset machining point 82a. Further, the discharge member 87 is made of synthetic resin, and has a discharge port 86a formed at the front end portion thereof, and at the rear end portion thereof, like the bottom portion of the positioning member 85, made of a metal sucked by the mounting member 87. The suction member 86b is the mounting member
It is provided with an engaging pin 86c that engages with the positioning hole 87a of 87. The discharge member 86 has the engagement pin 86 after the cooling liquid discharge position is positioned by the positioning member 85.
By engaging c with the positioning hole 87a and sucking the suction member 86b to the mounting member 87, the cooling liquid attached to the tip of the cooling nozzle 84 and supplied to the cooling nozzle 84 is discharged, that is, the tool 82 is processed. Discharge to a point. By discharging the cooling liquid to the processing point, generation of heat in the tool 82 and the work is prevented and chips are removed, so that the processing accuracy can be improved and stabilized, and the life of the tool 82 can be extended.

Next, the operation of the cooling liquid supply device having the above structure will be described.

Prior to cutting with the tool 82, the discharge port
Positioning of 86a is performed.

The engaging pin 85b of the positioning member 85 is engaged with the positioning hole 87a so that the suction member 85a is sucked by the mounting member 87, and the positioning member 85 is mounted on the tip of the cooling nozzle 84. After the positioning member 85 is attached, the tip 85c of the positioning member 85 is attached to the tip of the tool 82 at a machining point 82
Contact a and position the cooling fluid discharge position. After positioning, the positioning member 85 is removed, the engaging pin 86c of the discharge member 86 is engaged with the positioning hole 87a, the suction member 86b is sucked by the mounting member 87, and the discharge member 86 is mounted on the tip of the cooling nozzle 84.

After the discharge member 86 is attached, a machining instruction to the spindle head 81 causes the spindle holding the tool holder 83 in the spindle head 81 to rotate, and the cutting work of the work is started. With the start of rotation of the main shaft, the coolant pump also starts to rotate, the coolant is supplied to the cooling nozzle 84 via the coolant pipe, and the coolant is discharged from the discharge port 86a of the discharge member 86 to the machining point 82a of the tool 82. Is ejected.

As described above, since the positioning member 85 is attached to the cooling nozzle 84 to position the discharge position of the cooling liquid, the positioning member 85 is removed and the discharge member 86 is attached to the cooling nozzle 84. It is possible to easily and accurately position the cooling liquid discharge position of the discharge port 86a without discharging the liquid, and to discharge the cooling liquid as in the past → check the discharge position → adjust the discharge direction → The work of discharging is unnecessary, and the positioning and adjustment time can be shortened.

In each of the above embodiments, the cooling nozzles 16, 35,
Although 54, 71, 81 are of the universal joint type in which a plurality of nozzle pieces are connected, the present invention is not limited to this, and a copper pipe type cooling nozzle may be used, and the same effect can be obtained.

Further, the present invention is not limited to the above-mentioned embodiments, and it goes without saying that various modifications can be made without departing from the gist of the present invention.

[0104]

As described above in detail, according to the cooling liquid supply apparatus of the present invention, the detachable cooling nozzle and the tool holder are integrated with the machine tool spindle head by the holding member, so that the tool can be replaced easily. At this time, it is not necessary to manually adjust the position of the cooling nozzle, and continuous processing can be performed.

Further, in the cooling liquid supply apparatus of the present invention, since the discharge port is adjusted in advance to the position for supplying the cooling liquid to the processing point of the workpiece, the position of the cooling nozzle is changed during processing or when changing tools. This has the effect of eliminating the need to manually adjust.

According to the cooling liquid supply apparatus of the present invention,
Based on the detection output of the detection means for detecting the processing point, the control means controls the holding means for holding the discharge port of the cooling nozzle so that it can be directed in any direction so that the discharge port is directed to the processing point. The position of the discharge port of the cooling nozzle is automatically determined, and the position of the discharge port of the cooling nozzle can be automatically adjusted. In addition, manual adjustment is not required, and labor can be saved. it can.

Further, in the cooling liquid supply apparatus of the present invention, since the detecting means is the sound sensor or the temperature sensor, it is possible to detect the processing point of the work piece with a simple structure.

Further, in the cooling liquid supply apparatus of the present invention, since the detecting means is the image processing means, it is possible to accurately detect the processing point of the work piece.

Further, in the cooling liquid supply apparatus of the present invention, since the holding means is a robot, the cooling liquid can be discharged from the proper direction and the cooling nozzle does not interfere with the tool replacement when the tool is replaced. Can be evacuated to.

Further, in the cooling liquid supply apparatus of the present invention, since the holding means is the positioning table, the position adjustment of the discharge port of the cooling nozzle can be automated with a simple and inexpensive structure.

According to the cooling liquid supply apparatus of the present invention,
By irradiating the preset processing point with the light beam emitted from the irradiation means and adjusting the cooling liquid discharge position of the discharge port, the cooling liquid discharge position of the discharge port can be achieved without actually discharging the cooling liquid. Can be determined easily and accurately.

Further, in the cooling liquid supply apparatus of the present invention, the irradiation means is a laser light oscillation source and an optical cable, a light source for emitting diffused light, an optical lens for collimating the diffused light, a lamp and a power source for driving the lamp, Alternatively, since the pen type light source is used, the cooling liquid discharge position of the discharge port can be determined with a simple configuration.

According to the cooling liquid supply method of the present invention,
An irradiation step of irradiating a light beam from an irradiation means to an optical sensor installed at a processing point of the workpiece, and an adjusting step of adjusting the cooling liquid discharge position of the discharge port of the cooling nozzle based on the detection result of the optical sensor. With the configuration provided, the cooling liquid discharge position of the discharge port can be easily and accurately determined without actually discharging the cooling liquid.

According to the cooling liquid supply apparatus of the present invention,
With a configuration in which a positioning member that positions the discharge position of the cooling liquid at the processing point and a discharge member that discharges the cooling liquid at the discharge position positioned by the positioning member are selectively attached to the tip of the cooling nozzle by the attachment member. It is possible to determine the ejection position of the ejection port and eject the cooling liquid to the ejection position with a simple configuration without actually ejecting the cooling liquid.

[Brief description of drawings]

1A and 1B are views showing a cooling liquid supply apparatus of a first embodiment of the present invention, FIG. 1A is a view showing the configuration thereof, FIG. 1B is a view showing a main part thereof, and FIG. FIG. 1C is a diagram showing attachment / detachment of the tool, and FIG. 1D is a diagram showing exchange of the tool.

FIG. 2 is a diagram showing an outline of a second embodiment of the present invention.

FIG. 3 is a diagram showing another embodiment of the second embodiment of the present invention.

FIG. 4 is a diagram showing an outline of a third embodiment of the present invention.

5 is a view showing another embodiment of the third embodiment of the present invention, FIG. 5 (a) is a view showing the first other embodiment, FIG.
FIG. 5B is a diagram showing a second other embodiment, and FIG. 5C.
FIG. 11 is a diagram showing a third other embodiment.

FIG. 6 is a diagram showing an outline of a fourth embodiment of the present invention.

FIG. 7 is a diagram showing an outline of a fifth embodiment of the present invention.

FIG. 8 is a diagram showing a conventional cooling liquid supply device by a universal joint system.

FIG. 9 is a diagram showing a conventional through-hole type cooling liquid supply device, FIG. 9 (a) is a diagram showing a through-hole type tool, and FIG. 9 (b) is a diagram showing an example of cutting by a milling machine. is there.

[Explanation of symbols]

 11,31,51,71,81… Machine tool spindle head 12,32,52,72,82… Tool 13,33,53,73,83… Tool holder 15,34… Workpiece 16,35,54, 71,81 ... Cooling nozzle 16c, 35b, 54b, 74b, 86a ... Discharge port 17, 36 ... Coolant 18 ... Holding member 37 ... Robot arm (holding means) 39 ... Sound sensor (detecting means) 40 ... Control part ( Control means) 42 ... positioning table (holding means) 55,75 ... laser light oscillation source (irradiation means) 56,76 ... optical cable (irradiation means) 57 ... diffused light source (irradiation means) 58 ... optical lens (irradiation means) 60 … Lamp (irradiation means) 61… Power supply (irradiation means) 63… Pen type light source (irradiation means) 77… Optical sensor 85… Positioning member 86… Discharge member 87… Mounting member

Claims (15)

[Claims] 1. A machine tool spindle head having a coolant supply section, a tool holder detachably attached to the machine tool spindle head for holding a tool for machining a workpiece, and a coolant for the machine tool spindle head. A cooling liquid nozzle that is detachably connected to a supply unit and has a discharge port that discharges a cooling liquid to a processing point of the workpiece, and a cooling nozzle that holds the cooling nozzle and is positionally attached to the tool holder. A cooling liquid supply device comprising: a holding member that integrates the tool holder. 2. The cooling liquid supply device according to claim 1, wherein the discharge port is adjusted in advance to a position for supplying the cooling liquid to a processing point of the workpiece. 3. A machine tool spindle head having a cooling liquid supply section, a tool holder detachably attached to the machine tool spindle head for holding a tool for machining a workpiece, and a cooling liquid for the machine tool spindle head. A cooling nozzle connected to a supply unit and having a discharge port for discharging a cooling liquid to a processing point of the workpiece, and a holding unit capable of holding the vicinity of the tip of the cooling nozzle and directing the discharge port in an arbitrary direction. A detection means attached to the vicinity of the tip of the cooling nozzle to detect the processing point of the workpiece, and the holding means based on the detection output of the detection means to control the discharge port to the workpiece. A cooling liquid supply apparatus comprising: a control unit that directs the processing point. 4. The cooling liquid supply apparatus according to claim 3, wherein the detection means is a sound sensor that detects a processing sound and detects a processing point. 5. The cooling liquid supply apparatus according to claim 3, wherein the detection means is a temperature sensor that detects the temperature of the workpiece to detect the processing point. 6. The cooling liquid supply apparatus according to claim 4, wherein the detection unit is an image processing unit that performs image processing on the processing state of the workpiece to detect the processing point. 7. The cooling liquid supply apparatus according to claim 3, wherein the holding means is a robot. 8. The cooling liquid supply apparatus according to claim 3, wherein the holding means is a positioning table. 9. A machine tool spindle head having a cooling liquid supply section, a tool holder detachably attached to the machine tool spindle head for holding a tool for machining a workpiece, and a cooling liquid for the machine tool spindle head. A cooling nozzle that is connected to a supply unit and has a discharge port that discharges a cooling liquid to a processing point of the workpiece, and the cooling nozzle that emits a light beam and that the trajectory of the light beam substantially coincides with the discharge trajectory of the cooling liquid It is provided with an irradiation unit attached to a nozzle for adjusting a discharge position of the cooling liquid of the discharge port by irradiating a light beam to the preset processing point from the tip of the cooling nozzle. Coolant supply device. 10. The irradiating means comprises a laser light oscillation source that emits laser light, and an optical cable that guides the laser light emitted from the laser light oscillation source to the tip portion of the cooling nozzle. Item 9. A cooling liquid supply device according to item 9. 11. The cooling liquid supply device according to claim 9, wherein the irradiation means includes a light source that emits diffused light and an optical lens that collimates the diffused light emitted from the light source. . 12. The cooling liquid supply apparatus according to claim 9, wherein the irradiation unit is a lamp and a power source for driving the lamp. 13. The cooling liquid supply apparatus according to claim 9, wherein the irradiation means is a pen type light source. 14. A machine tool spindle head having a coolant supply part, a tool holder detachably attached to the machine tool spindle head and holding a tool for processing a workpiece, and a coolant for the machine tool spindle head. A cooling liquid supply method, comprising a cooling nozzle connected to a supply unit and having a discharge port for discharging a cooling liquid to a processing point of the workpiece, wherein the cooling liquid is supplied to the processing point of the workpiece. An irradiation step of irradiating and irradiating the light beam from the irradiation means attached to the cooling nozzle so that the trajectory of the light beam substantially coincides with the trajectory of the cooling liquid discharge; And an adjusting step of adjusting the cooling liquid discharge position of the discharge port of the cooling nozzle based on the detection result of the optical sensor. 15. A machine tool spindle head having a coolant supply section, a tool holder detachably attached to the machine tool spindle head for holding a tool for machining a workpiece, and a coolant for the machine tool spindle head. A cooling nozzle that is connected to a supply unit and supplies cooling liquid to a processing point of the workpiece, and a discharge position of the cooling liquid that is detachably attached to the tip of the cooling nozzle and that is supplied from the cooling nozzle are set to the workpiece. Of the cooling nozzle, a discharge member that is detachably attached to the tip of the cooling nozzle and discharges the cooling liquid to the discharge position that is positioned by the positioning member, and the positioning member and the discharge member are selectively And a mounting member mounted on the tip of the cooling nozzle.