JP4933918B2 - Fluid supply method and machine tool for tool. - Google Patents

Description

  The present invention relates to a fluid supply method and a machine tool for the tool in a machine tool including a fluid supply means for supplying a fluid to a cutting tool of a tool holder mounted on the machine tool.

2. Description of the Related Art Conventionally, a machine tool including a fluid supply means for supplying fluid from a side of a main part of a tool holder with respect to a cutting tool of a tool holder mounted on a machine tool is widely known. For example, in the art including the machine tool disclosed in Patent Document 1, it is also known as a side-through method, a side-through MQL method, or a side fluid supply method.
For example, the following configuration is described for the machine tool shown in Patent Document 1 (reference numerals used in the following description are based on the description of Patent Document 1).
A spindle 3 is rotatably provided inside the frame 2, and a holder mounting hole 5 for mounting a shank 21 in a side fluid supply type tool holder B is provided at the tip of the spindle.
Further, the frame is provided with a liquid supply base at a side position of the holder mounting hole of the spindle, and the side fluid supply type tool is provided at the tip of the liquid supply base 6. A fitting hole 7 for fitting the fluid receiving cylinder 31 in the holder is provided. The fitting hole is provided with a fluid passage hole connected to the fluid supply means.

During operation, the shank 21 in the tool holder B is mounted in the holder mounting hole 5 and the tip of the fluid receiving cylinder 31 is also fitted in the fitting hole 7 in the liquid supply platform. Let
Next, the main part 20 of the tool holder B is rotated by rotating the spindle.
On the other hand, a fluid (for example, cooling mist) is ejected from the fluid passage hole 9 and is provided in the fluid chamber 38 provided in the hollow portion of the fluid receiving cylinder 31 in the tool holder and in the main portion 20 of the tool holder B. The fluid from the fluid supply means (for example, air and the oil component for cooling) is mixed toward the tool C (blade) attached to the tip of the main body 20 of the tool holder B via the fluid passage 24. Mist).

  In the machine tool having the above configuration, even when the tool holder is rotated at a high speed, the fluid to be supplied to the cutting tool of the tool holder is supplied from the side of the main portion of the tool holder, that is, fluid (for example, cooling mist). Can be supplied from a position relatively close to the tip of the tool holder, so that the cooling mist has an advantage that it can be supplied with less adverse effects of centrifugal force during high-speed rotation.

JP-A-2005-34964

  In this conventional machine tool, a cooling mist appropriately mixed in the fluid supply means located at a position away from the liquid supply base 6 is made, and the mist is supplied to the liquid supply via a known pipe. It supplies to the stand. However, if the tool holder is frequently replaced with the spindle, or if the degree of subtle changes in cutting by the tool (blade) becomes severe, the work supply will be moved away from the liquid supply table 6 with respect to these changes in work. The supply of the cooling mist properly mixed in a fluid supply means has a problem that the timing or the change in the component ratio of the cooling mist cannot be accommodated due to the time difference, and the responsiveness is required to be sharpened. Yes.

Further, when replacing the tool holder with respect to the spindle, the shank 21 in the tool holder B is mounted in the holder mounting hole 5 and the fluid receiving cylinder is mounted in the fitting hole 7 in the liquid supply platform. The tip of 31 is fitted, and the spindle 3 is immediately rotated at a high speed to start cutting work.
However, the cooling mist ejected from the liquid supply base 6 as described above is long in the fluid chamber 38 of the fluid receiving cylinder 31 in the tool holder, the fluid passage 24 provided in the main portion 20 of the tool holder B, and the like. Since it flows toward the tool C (cutting tool) attached to the tip of the tool holder B via the passage, it takes time, and during that time, an appropriate amount of cooling mist is not supplied to the tool C that rotates at high speed. There is a problem, and in addition, in the cooling mist that reaches the tool C, the moving speed of the liquid having a higher specific gravity is slower than the air flow, and as a result, the tool C reaches the tool C. The mixing ratio of the liquid of the cooling mist is different from that of the cooling mist properly mixed in the fluid supply means, and the so-called inappropriate lubricant (cooling mist) is supplied with a very small mixing ratio of the liquid. There was a problem that would be.

An object of the present application is to provide a fluid supply method for a tool that can quickly supply an appropriate lubricant toward the tool when the tool holder is replaced with respect to the spindle.
Another object is to provide a machine tool capable of promptly supplying an appropriate lubricant when the tool holder is replaced with respect to the spindle.
Other objects and advantages will be readily apparent from the drawings and the following description associated therewith.

In the fluid supply method for a tool in the present invention, a spindle is rotatably provided inside the frame, and a holder mounting hole for mounting a shank in a side fluid supply type tool holder is provided at the tip of the spindle. Prepare
Further, the frame is provided with a positioning block at the side of the holder mounting hole of the spindle, and a positioning pin in the lateral fluid supply type tool holder is fitted to the tip of the positioning block. With a fitting hole for
The fitting hole is provided with a fluid outlet connected to the fluid supply means, and the shank in the tool holder is mounted on the holder mounting hole, and the positioning pin is also mounted on the fitting hole of the positioning block. The tip of the
Rotate the main part of the tool holder by rotating the spindle;
On the other hand, to the tool to be mounted on the tip of the main part of the tool holder via the flow path provided in the hollow part of the positioning pin from the fluid outlet and the fluid path provided in the main part of the tool holder In the fluid supply method for the tool for supplying the fluid from the fluid supply means,
A liquid storage chamber is provided at a position close to the fluid supply means of the fluid outlet in the positioning block, and the liquid storage chamber communicates with the liquid fluid path in the fluid supply means and the air fluid path.
Prior to fitting the tip of the positioning pin to the fitting hole of the positioning block, liquid is supplied from the liquid fluid path to the liquid storage chamber in advance, and the positioning block is fitted. With the tip of the positioning pin fitted into the hole, high-pressure air (or fluid containing mist-like liquid in high-pressure air) is blown into the liquid storage chamber through an air fluid path, and the liquid storage The liquid previously stored in the room is ejected toward the flow path of the positioning pin, and then the predetermined fluid from the fluid supply means is ejected toward the flow path of the positioning pin. It is.

In the present invention, when the tool holder B is replaced with the spindle 3, the shank 21 in the tool holder B is newly installed in the holder mounting hole 5, and the positioning pin is also mounted in the fitting hole 10 of the positioning block D. Even when the tip of 31 is fitted and then the spindle 3 is rotated at a high speed to start cutting work,
The liquid 60a previously stored in the liquid storage chamber 60 provided at a position near the fluid supply means of the fluid outlet 11 in the positioning block is used as the flow path of the positioning pin 31 in the new tool holder B. Since a predetermined fluid from the fluid supply means F is ejected toward the flow path 38 of the positioning pin, for example, as a mist, the new tool holder B In the initial stage, a fluid containing a large amount of liquid having a high concentration is supplied toward the flow path 38 of the positioning pin and the fluid path 24 provided in the main portion 20 of the tool holder B.
This has the effect of helping to solve the problem that the cooling mist with a very small mixing ratio of the liquid is supplied to the cutting tool C in the newly installed tool holder B in the early stage of rotation.

  Embodiments of the present application will be described below with reference to the drawings. 1 to 3, A is also called a machining center or the like and indicates the existence of a widely known machine tool. In this figure, reference numeral 2 denotes a frame that is also referred to as a spindle head, and a spindle 3 that is also referred to as a spindle is rotatably provided inside the fixed frame 2. Reference numeral 4 denotes a bearing. The tip 3a of the spindle 3 is provided with a holder mounting hole 5 for mounting the shank 21 in the side fluid supply type tool holder B. As is well known, the mounting hole 5 is formed in a taper shape (gradient) having an arbitrarily selected standard dimension in order to correspond to various standard shanks. Reference numeral 6 denotes an engaging claw for enabling the spindle 3 and the main body 20 to rotate integrally. Reference numeral 7 denotes a hollow portion, and there is a well-known pulling tool that can normally pull the pull stud 21a. If necessary, a cooling fluid is sent from a cooling fluid supply means (not shown) through a fluid flow hole provided in the hollow portion 7 toward the tool C attached to the tip of the main body 20 as is well known. There is a case.

Next, the frame 2 (or another stationary member adjacent to the frame 2) is provided with a positioning block D at a side position of the holder mounting hole 5 of the spindle 3 as shown in FIG. The front end 8a of the positioning block D is provided with a fitting hole 10 for fitting a positioning pin (also referred to as a plunger pin) 31 in the lateral fluid supply type tool holder B, and the fitting hole 10, a fluid outlet 11 connected to the fluid supply means F is provided.
In the positioning block D, 8 is screwed into a fixing surface (for example, a female screw hole provided on the mounting surface 2a side by using a bolt) with respect to the mounting surface 2a provided at the tip of the frame 2. A cylindrical positioning frame 10 that is detachable and attached in close contact with the mounting means), 10 is a fitting hole provided at the tip of the positioning frame 31 and corresponds to the shape of the tip of the positioning pin 31 and is watertight It is configured in a shape that allows close contact.

Next, the tool holder B will be described.
Various types of tool holders B of the lateral fluid supply system (also widely known in the art as a side-through or side-through MQL system) are widely known in the market. 1, a main body 20 rotated by a spindle 3, and a case 40 that rotatably supports an intermediate portion of the main body 20 via a bearing 41 (a position closer to the front as shown in the figure than an intermediate position); And positioning pins 31 that are fitted in the fitting holes 10 of the positioning block D of the frame 2 and connected to the case 40.
The case 40 is provided with a fluid outlet provided inside the case for sending the fluid received by the flow passage 38 of the positioning pin 31 from the fluid outlet 11 of the machine tool A to the fluid receiving hole 58 of the main body 20. 42. Specifically, fluid receiving means 30 (including flow paths 38 and 46) for sending the fluid received from the fluid outlet 11 of the machine tool A toward the case 40, and fluid receiving means 30 And a fluid receiving member that connects the fluid delivery port 42 in the case 40 and a sealing mechanism for the fluid supplied from the fluid receiving means 30 provided between the case 40 and the main body 20. .

Next, the main part 20 will be described. A taper-shaped protrusion (shank) 21 that can be fitted as a mounting portion 21 for the holder mounting hole 5 in the spindle 3 of the machine tool main body A is provided at the rear portion of the main body portion 20.
A tool mounting portion 25 having a known arbitrary configuration is provided at the front portion. As is well known, an arbitrary tool can be detachably mounted on the tool mounting portion 25 and fluid can be ejected from the tip of the tool or the periphery of the tool.
The tool mounting portion 25 includes, for example, a fluid path 43, and is provided with a tool mounting hole including a receiving tool 25a that allows the tool C to be mounted.
The intermediate portion of the main body 20 includes a holder gripping member 22 having a groove 22a into which a known manipulator claw (not shown) is fitted.
Further, in the intermediate portion of the main body portion 20, in order to supply fluid toward the tool C mounted on the tool mounting portion 25 (toward the cutting edge of the tool C or the periphery of the cutting edge), it is placed at the axial center position of the spindle. A fluid passage 24 to be provided, and fluid receiving holes 58 and 23 that open toward the inner peripheral surface of the case 40 so as to receive fluid from the case 40 side with respect to the fluid passage 24 are provided.

Further, in the main body 20, for example, a fluid is annularly arranged between the inner peripheral surface of the case 40 and the outer peripheral surface of the main body with respect to the position facing the inner peripheral surface of the case 40. For this purpose, an annular channel 57 is formed. The annular channel 57 is formed by denting the outer peripheral surface side of the main body 20 rotating at a high speed even if the inner peripheral surface side of the case 40 that is statically positioned is recessed as shown in the figure. However, since these are relative configurations, there is no problem.
The annular flow path 57 allows the fluid delivery port 42 and the fluid reception hole 58 to communicate with each other so that fluid from the fluid delivery port 42 can flow into the fluid reception hole 58.

  With this configuration, the fluid ejected from the one or more fluid delivery ports 42 on the inner peripheral surface side of the case 40 that is positioned statically flows into the annular flow path and surrounds the main body 20 during high-speed rotation. The inside of the annular flow channel located at is filled. On the other hand, in the main portion 20 rotating at high speed, one or a plurality of fluid receiving holes 58 are rotating at high speed, so that the fluid in the annular channel can be continuously received.

Next, the fluid receiving transmission means 30 includes a positioning pin 31 to be fitted in the fitting hole 10 of the positioning block D, and the positioning pin 31 is slidably held in the axial direction and is fixed to the case 40 side. The holding cylinder 32 is constituted.
For example, as shown in FIG. 1, the case 40 is integrated in a state in which bearings 41, 41 are fitted into the left side of the figure so that the main body 20 is rotatable. Further, as is widely known, a seal case 35 is disposed on the right side from the center, and a seal 36 is provided therein so that it can be inserted and removed. A fluid passage 46 is interposed between the case 40 and the holding cylinder 32 fixed to the outer peripheral position of the case 40 so that fluid from the flow passage 38 can flow to the fluid delivery port 42. .

In the positioning block D, a liquid storage chamber 60 in the liquid storage means G is provided at an adjacent position close to the fluid supply means F located on the upstream side of the fluid outlet 11 as shown in the figure. The liquid storage chamber 60 is connected to a supply pipe that communicates with the liquid fluid passage 18a and the air fluid passage 17a in the fluid supply means F, respectively. As shown in FIG. 1, the communication mode may be communicated indirectly via the mist mixing means E, or the air compression device F1 and the oil (water) supply device F2 in the fluid supply means F, Communication may be performed directly from F3 via an arbitrary control valve (solenoid valve or the like: not shown).

Next, as shown in FIG. 1, the fluid mixing chamber 13 in the mist mixing means E is provided adjacent to a position close to the fluid supply means F side (upstream side) in the liquid storage chamber 60.
Further, the fluid mixing chamber 13 is provided with a plurality of fluid paths such as a first fluid path 17 connected to the fluid supply means F and a second fluid path 18 and a third fluid path 19 different from the first fluid path, respectively. Communicated.
Fluids having different properties such as air and liquid are supplied to the plurality of fluid paths (17, 18, 19), and a plurality of fluids having different properties are provided by the mist mixing means E provided in the fluid mixing chamber 13. The mixed fluid is ejected from the fluid outlet 11 toward the fitting hole 10 through the liquid storage chamber 60, and the mixed fluid is directed toward the flow path 38 of the positioning pin. The mixed fluid is circulated to supply the mixed fluid toward the tool C.

  More specifically, as shown in FIGS. 1 to 3, the outer shell 8 of the positioning block D is made of an integral material to form the outer shell of the liquid storage chamber 60 and the outer shell of the fluid mixing chamber 13. Both are stored in the positioning block D. The liquid storage chamber 60 is provided behind the fitting hole 10, and the fluid mixing chamber 13 is further provided adjacent to the liquid storage chamber 60 as shown in the figure, and further, the fluid mixing chamber 13 is provided there as shown in the figure. A first fluid path 17 connected to the supply means F and a second fluid path 18 different from the first fluid path 17 are communicated with each other.

  Further, if necessary, a third fluid path 19 (if necessary, a plurality or a plurality of fluid paths such as fourth and fifth fluid paths may be added one after another) is communicated. The first fluid path 17 has a well-known compressed air flow, the second fluid path 18 has a fluid different from the air flow (for example, a well-known cooling oil), and the third fluid path 19 has an air flow. A fluid different from the above (for example, well-known cooling water) is supplied and mixed by the mist mixing means E having a well-known configuration provided in the fluid mixing chamber 13. This mixing can be performed by optionally supplying a number of different fluids, such as two or three of different fluids (those with different components, or different component ratios if they have the same properties). When a fluid having a predetermined arbitrary mixing ratio (also simply referred to as mist) is blown out from the fluid outlet 11 toward the fitting hole 10, it is clearly shown in the flow path 38 of the positioning pin 31 from the figure. The mixed mist fluid is circulated toward the tool C to supply the mixed fluid toward the tool C.

  Next, in the liquid storage means G, the liquid storage chamber 60 is provided as described above. As shown in the figure, the liquid storage chamber 60 has an inlet 61 for receiving fluid (oily liquid or mist) from the outlet 13a of the mist mixing means E, and an outlet 62 for ejecting the fluid toward the next stage. Prepare.

The outlet 62 is provided with a valve body 65 for controlling the outflow amount of the fluid 60a in the liquid storage chamber 60 so as to be freely opened and closed. Reference numeral 66 denotes a cover member in the valve body 65 for contacting and separating from a valve seat (seal) 63 provided around the opening edge of the nozzle member insertion hole 16. Therefore, when the positioning pin 31 is not attached as shown in FIG. 2, the fluid 60 a in the liquid storage chamber 60 does not leak into the nozzle member insertion hole 16. 67 is an operation piece projecting from the positioning pin 31 (nozzle member 31a) side of the valve body 65. When the nozzle member 31a of the positioning pin 31 is mounted in the nozzle member insertion hole 16 as shown in FIG. The operation piece 67 is pushed in as shown in the figure by the leading portion of the member 31a, and the valve body 65 is retracted to allow the fluid 60a in the liquid storage chamber 60 to flow out.
The slit 67a shown in FIG. 3 (B) is provided in the middle of the operation piece 67, and the fluid (liquid lubricant) in the liquid storage chamber 60 in the retracted state of FIG. 3 (B). This is to allow 60a to be ejected to the flow path 38.
As another means, for example, when the nozzle member 31a is mounted in the nozzle member insertion hole 16, as shown in FIG. 3, the valve body 65 is moved backward by a control device (not shown) to store the liquid toward the nozzle member insertion hole 16. The fluid 60a in the chamber 60 may be ejected.
Reference numeral 70 denotes the presence of O-rings for preventing oil leakage in the state of FIG.

  The volume for storing the fluid in the liquid storage chamber 60 is set so that all the flow path spaces (reference numerals 38, 46, 42, 24, 44) related to the tool holder B are obtained with the positioning pins 31 separated as shown in FIG. It is desirable to provide a volume capable of storing an amount of lubricant (liquid) sufficient to fill up the flow paths related to the above. However, depending on the rotational speed of the main body 20 and the degree of compression in the air compressor F1, the volume in the liquid storage chamber 60 may be smaller than that.

  In addition, as said fluid, what is called a fluid in this field, for example, air, cutting oil, lubricating oil, water, fluid called gaseous mist mixed with air, Alternatively, there are fluids called coolants and the like, and in the present specification, each of them is generically called a fluid for convenience.

  Next, the mist mixing means E provided in the fluid mixing chamber 13 may have a known configuration. For example, a small nozzle hole 15 is formed by a nozzle member 14 having an intermediate portion bulged as shown in the drawing, By blowing high-pressure air from the first fluid passage 17 into the nozzle hole 15, the liquid fluid comes out from the second fluid passage 18 or the third fluid passage 19 located on the side in a right angle state, or both, and forms a mist. The mist fluid is directed toward the fitting hole 10.

Next, the usage method and usage state of the above configuration will be described.
In the side fluid supply type tool holder B configured as described above, the locking piece 37 is fitted into the fitting recess 26 in a state where it is housed in a magazine (not shown) to prevent the main body 20 from rotating. . When the tool holder B is mounted on the machine tool main body A, the protrusion 21 of the main body portion 20 is directed toward the mounting hole 5 of the spindle 3 from the state shown in FIG. 1 toward the left (axial direction). As is well known, the inner surface of the mounting hole 5 and the outer peripheral surface of the protrusion 21 are connected in close contact with each other using a pulling tool.
Then, the positioning pin 31 of the fluid receiving means 30 abuts and fits into the fitting hole 10 of the positioning block D as shown in FIG. 3, and is simultaneously pushed toward the inside of the holding cylinder 32, as a result. The locking piece 37 is disengaged from the fitting recess 26, and the main body 20 can be freely rotated.

When the tool holder B is mounted on the machine tool main body A, that is, before the tip of the positioning pin is fitted into the fitting hole of the positioning block, the liquid storage chamber 60 is previously set. The liquid (lubricant) is supplied from the liquid fluid path as follows.
After the previous cutting process is completed, the above-described liquid is removed in a time zone (automatic tool change time zone: during ATC) until the tool holder B used before is removed from the spindle 3 and the next tool holder B is mounted. A predetermined required amount of lubricant 60a is supplied to the storage chamber 60 directly from the cooling oil supply device F2 (or water supply device F3) or via the fluid mixing chamber 13.

Therefore, when the nozzle member 31a provided at the tip of the positioning pin is fitted to the fitting hole 10 of the positioning block as shown in FIG. 3, the valve body 65 is opened, while the liquid storage chamber 60 is opened. In contrast, by blowing high-pressure air (or fluid containing mist-like liquid in high-pressure air) in advance or simultaneously through the air fluid passage 17, the inside of the liquid storage chamber 60 is in a pressurized state, Moreover, since the liquid 60a stored in the liquid storage chamber 60 is an incompressible fluid, it is pushed toward the flow path spaces 38, 46, 42, 24, 44, etc. related to the tool holder B by being pushed by the compressed air. The flow path space is filled with a lubricant and forcedly discharged toward the tool. The supply amount of the lubricant supplied to the liquid storage chamber 60 per one time is controlled by a pump or an orifice, and it is sufficient to always ensure a constant supply amount optimal for processing. As is well known, electronic control (CPU) may be used for various timings related to the supply of the lubricant supplied to the liquid storage chamber 60, the blowing of air, and the like.
In this way, after the automatic tool change (ATC), the lubricant can be reliably supplied from the cutting edge when the cutting edge of the cutting tool attached to the MQL side through holder comes close to the workpiece.
Thereafter, a predetermined fluid from the fluid supply means is ejected toward the flow path of the positioning pin. This point will be described below.

  When the spindle 3 rotates in the mounted state, the main body 20 rotates integrally, and the tool C also rotates together to perform a known cutting process. The number of revolutions of the main body 20 is generally around 10,000, for example, per minute, and further towards 20000 revolutions, and even more.

In the above process, for example, an air compressor F1 such as a compressor provided at a relatively distant position as the fluid supply means F passes through the pipe 17a and also through a flow rate control valve (not shown). By being connected to the one fluid path 17, the high-pressure air produced by the compression device F1 passes through the nozzle hole 15 and the positioning pin 31 via the liquid storage chamber 60 after the liquid 60a is discharged. Can be ejected in the direction of.
Further, for example, a cooling oil supply device F2 provided as a fluid supply means F at a relatively distant position is connected to the second fluid path 18 via the pipe 18a and via the flow rate control valve 18b. As a result, the high-pressure oil (fluid) produced by the oil supply device F2 is atomized in the nozzle hole 15, becomes mist, and is ejected along with the air flow toward the positioning pin 31 via the liquid storage chamber 60. To do.

Further, for example, a cooling water supply device F3 provided at a relatively distant position as the fluid supply means F is connected to the third fluid path 19 via the pipe 19a and via the flow rate control valve 19b. As a result, the high-pressure water (fluid) produced by the water supply device F3 is atomized in the nozzle hole 15 shown in the figure, becomes mist, and flows in the direction of the positioning pin 31 via the liquid storage chamber 60 together with the air flow. Erupts.
In the above configuration, the air flow in the pipe 17a, the oil flow in the pipe 18a, the water flow in the pipe 19a, etc., can be flown independently, or can be mixed at an arbitrary concentration by selectively mixing them. It is possible to make a mist (a kind corresponding to cutting demand).

   Next, the fluid sent through the fluid outlet 11 of the positioning block D described above flows into the flow path 38 of the positioning pin 31 and passes through the flow path 38, the fluid path 46, etc. as described above, and the seal case 35. The fluid from the fluid outlet 42 of the case 40 passes through the annular channel 57, the fluid receiving hole 58, the fluid passage 23, the fluid passage 24, and the fluid hole 43. It circulates toward the tool C, passes through the periphery of the cutting edge 45 of the tool C or the fluid path 44 of the tool, and jets vigorously from the cutting edge. This fluid lubricates or cools the tool C during the cutting operation.

In the above configuration, as is clear from FIG. 1, the fluid mixing chamber 13 for making the mist has a positioning block provided with a fitting hole 10 for fitting the positioning pin 31 in the tool holder B. Since it is provided in D, immediately after the tool holder B is mounted on the spindle 3, there is an advantage that the mist grown in the shortest distance can be sent to the tool C immediately.
Repeatedly, the mist mixing device is integrally arranged in the positioning block, the distance between the mist mixing portion and the plunger pin to be supplied to the tool holder is made the shortest until the lubricant reaches the cutting edge from the start of the mist mixing device. Time can be shortened.
Furthermore, since the fluid can be supplied from a position relatively close to the tip of the tool holder, the cooling mist has an advantage that the mist loss at the time of transportation can be reduced and the discharge loss to the blade edge of the mist at the time of high speed rotation can be reduced. is there.
Further, during cutting using the tool C, there is an advantage that mist having an appropriate content corresponding to the cutting situation can be quickly delivered from the position of the positioning block D.

  Further, as apparent from FIG. 1, the fluid mixing chamber 13 for making the mist is provided for the positioning block D including the fitting hole 10 for fitting the positioning pin 31 in the tool holder B. In this case, even when the nozzle hole 15 is clogged, the detachable frame body 8 is removed from the frame 2 at the contact portion 9 as shown in FIG. be able to.

Sectional drawing for demonstrating the state (separated state) just before mounting | wearing with the spindle 3 the tool holder B of a side fluid supply system. FIG. 4 is a partial cross-sectional view showing a state where a liquid (lubricant) 60a is filled in a liquid storage chamber 60 in a positioning block D. FIG. 5A is a partial cross-sectional view showing a state in which the positioning pin 31 is coupled to the positioning block D (connected state), the valve body 65 is opened, and the fluid 60a is ejected from the liquid storage chamber 60. (B) The figure is a cross-sectional view at XX.

Explanation of symbols

Machine tool ... A, Tool holder ... B, Tool ... C, Positioning block ... D, Mist mixing means ... E, Fluid supply means ... F, Air compressor ... F1 , Oil supply device ... F2, Water supply device ... F3, Liquid storage means ... G, Frame ... 2, Mounting surface ... 2a, Spindle ... 3, Holder mounting hole ... 5, tip part ... 8a, base part ... 9, fitting hole ... 10, partition wall ... 10a, fluid outlet ... 11, fluid mixing chamber ... 13, nozzle member ...・ 14, Nozzle hole ... 15, Nozzle member insertion hole ... 16, First fluid passage ... 17, Second fluid passage ... 18, Third fluid passage ... 19, Main part ..20, shank ... 21, fluid passage ... 24, tool mounting part ... 25, fluid receiving transmission means ... 30, positioning pin ... 31, nozzle member ... 31a, flow passage ... 38, Case ...・ 40, Fluid delivery port ... 42, Fluid passage ... 44, Liquid storage chamber ... 60, Fluid ... 60a, Inlet ... 61, Outlet ... 62, Valve seat (seal) ··· 63, valve body ... 65, lid member ... 66, operation piece ... 67, slit ... 67a.

Claims (3)

A spindle is rotatably provided inside the frame, and a tip for the spindle is provided with a holder mounting hole for mounting a shank in a side fluid supply type tool holder,
Further, the frame is provided with a positioning block at the side of the holder mounting hole of the spindle, and a positioning pin in the lateral fluid supply type tool holder is fitted to the tip of the positioning block. With a fitting hole for
The fitting hole is provided with a fluid outlet connected to the fluid supply means, and the shank in the tool holder is mounted on the holder mounting hole, and the positioning pin is also mounted on the fitting hole of the positioning block. The tip of the
Rotate the main part of the tool holder by rotating the spindle;
On the other hand, to the tool to be mounted on the tip of the main part of the tool holder via the flow path provided in the hollow part of the positioning pin from the fluid outlet and the fluid path provided in the main part of the tool holder In the fluid supply method for the tool for supplying the fluid from the fluid supply means,
A liquid storage chamber is provided at a position close to the fluid supply means of the fluid outlet in the positioning block, and the liquid storage chamber communicates with the liquid fluid path in the fluid supply means and the air fluid path.
Prior to fitting the tip of the positioning pin to the fitting hole of the positioning block, liquid is supplied from the liquid fluid path to the liquid storage chamber in advance, and the positioning block is fitted. With the tip of the positioning pin fitted into the hole, high-pressure air (or fluid containing mist-like liquid in high-pressure air) is blown into the liquid storage chamber through an air fluid path, and the liquid storage The liquid previously stored in the room is ejected toward the flow path of the positioning pin, and then a predetermined fluid from the fluid supply means is ejected toward the flow path of the positioning pin. A fluid supply method for a tool characterized by the above. A liquid storage chamber is provided at a position near the fluid supply means of the fluid outlet in the positioning block, and a fluid mixing chamber is provided at a position close to the fluid supply means in the liquid storage chamber, Furthermore, in the fluid mixing chamber, a first fluid path that communicates with the fluid supply means and a second and a third plurality of fluid paths that are different from the first fluid path are respectively communicated,
A plurality of fluids having different properties such as air and liquid are supplied to the plurality of fluid paths, and the plurality of fluids having different properties are mixed by a mist mixing means provided in the fluid mixing chamber. The mixed fluid was circulated toward the flow path of the positioning pin and mixed toward the tool by blowing out from the fluid outlet through the liquid storage chamber to the fitting hole. 2. A fluid supply method for a tool according to claim 1, wherein a fluid is supplied. A spindle is rotatably provided inside the frame, and a tip for the spindle is provided with a holder mounting hole for mounting a shank in a side fluid supply type tool holder,
Further, the frame is provided with a positioning block at the side of the holder mounting hole of the spindle, and a positioning pin in the lateral fluid supply type tool holder is fitted to the tip of the positioning block. With a fitting hole for
The fitting hole is provided with a fluid outlet connected to the fluid supply means, and the shank in the tool holder is mounted on the holder mounting hole, and the positioning pin is also mounted on the fitting hole of the positioning block. The tip of the
Rotate the main part of the tool holder by rotating the spindle;
On the other hand, to the tool to be mounted on the tip of the main part of the tool holder via the flow path provided in the hollow part of the positioning pin from the fluid outlet and the fluid path provided in the main part of the tool holder In a machine tool configured to supply the fluid from the fluid supply means,
A liquid storage chamber is provided at a position of the fluid outlet in the positioning block close to the fluid supply means, and the liquid storage chamber communicates with a liquid fluid path and an air fluid path in the fluid supply means. Prior to fitting the distal end of the positioning pin into the fitting hole of the positioning block, the liquid storage chamber is configured so that liquid can be supplied from the liquid fluid path in advance. With the tip of the positioning pin fitted to the fitting hole, high-pressure air (or fluid containing mist-like liquid in high-pressure air) is blown into the liquid storage chamber through an air fluid path, and A machine tool characterized in that the liquid stored in the liquid storage chamber can be ejected toward the flow path of the positioning pin.

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