JP6267993B2 - Flow path forming component, machining center using the same, and cleaning method for tool shank - Google Patents

Description

  The present invention relates to a flow path forming component configured to supply a fluid to a tool, a machining center using the same, and a method for cleaning a shank portion of the tool.

A tool support mechanism is provided on a rotary spindle of a machining center or the like, and the rotary tool as a tool is detachably attached to the tool support mechanism. The rotary tool is provided with a tapered shank portion that is mounted in a mounting hole provided in the tool support mechanism. The tool support mechanism is provided with a supply flow path for supplying a fluid such as coolant to the rotary tool. And the rotary tool which discharges the fluid from the front-end | tip part is rotated, and it processes to a to-be-processed object.
Incidentally, foreign matter such as chips may adhere to the shank portion of the tool mounted on the tool support mechanism when the tool is exchanged. For this reason, the shank part of the tool before mounting is opposed to the mounting hole of the tool support mechanism, and the fluid discharged from the supply flow path of the tool support mechanism is applied to the shank part to remove foreign matter adhering to the shank part. Yes.

  Further, for example, Patent Document 1 discloses a spindle device that can selectively supply coolant and air and can efficiently clean the shank portion of the tool holder using air. In this main shaft device, a coolant passage and an air passage are selectively connectable to the main passage. When the tool is clamped, the main passage and the coolant passage are connected, and the coolant is supplied to the tool when the workpiece is processed. On the other hand, when the tool is unclamped, the main passage and the air passage are connected, and the shank portion of the tool holder and the tool holder support portion of the spindle are effectively cleaned by the air.

JP 7-290342 A

However, when removing the foreign matter adhering to the shank portion of the tool, it is difficult to apply the fluid discharged from the supply flow path of the tool support mechanism to the entire shank portion. That is, since the fluid is discharged in a linear shape in the forming direction of the supply flow path of the tool support mechanism, it is difficult for the fluid to hit the entire circumference of the shank portion.
Moreover, the spindle apparatus of patent document 1 cleans the shank part of a tool holder and the tool holder support part of a spindle with air. For this reason, it is difficult to remove foreign matter such as chips adhering to the shank portion of the tool depending on the spindle device.

  The present invention has been made in view of such a background, and a flow path forming component capable of cleaning the entire circumference of the shank portion and effectively removing foreign matters adhering to the shank portion, a machining center using the same, and a machining center using the same It was obtained in an attempt to provide a method for cleaning a shank portion of a tool.

One aspect of the present invention is a flow path forming component that is disposed on the back side of a mounting hole in which a tapered shank portion in a tool is mounted, and supplies a fluid to a tool side flow path provided in the tool. Because
A spiral flow path for allowing the fluid to pass through in a spiral shape, and a round hole shape in which the center of the flow path is located at the center of the spiral of the spiral flow path on the downstream side of the spiral flow path. and possess a round hole-like flow path for discharging so as to spread in a conical shape having a cavity,
The cross-sectional area at the opening tip position of the round hole-shaped flow path is larger than the total cross-sectional area perpendicular to the flow path forming direction of the spiral flow path .

Another aspect of the present invention is a machining center configured using the flow path forming component,
The rotating spindle of the machining center has the mounting hole and the flow path forming component disposed on the back side of the mounting hole.
The tool is a rotary tool that is rotated by the rotary spindle and performs rotation processing on a workpiece.
The fluid is in a machining center using a flow path forming component, wherein the fluid is coolant discharged from the tip of the rotary tool.

Still another aspect of the present invention is a flow path for supplying a fluid to a tool side flow path provided in the tool, which is disposed on the back side of a mounting hole in which a tapered shank portion in the tool is mounted. A method of cleaning the shank portion of the tool using a formed part,
The flow path forming component includes a spiral flow path that allows the fluid to pass in a spiral shape, and a round shape in which the center of the flow path is located at the center of the spiral of the spiral flow path on the downstream side of the spiral flow path. A hole-shaped round hole-shaped channel is formed,
The cross-sectional area of the opening tip position of the round hole channel is larger than the total cross-sectional area orthogonal to the channel formation direction of the spiral channel,
The fluid that passes through the spiral channel and the round hole channel is discharged from the tip of the round hole channel so as to spread in a conical shape having a cavity, and the fluid is attached before being attached to the mounting hole. The cleaning method of the shank part of the tool is characterized by being applied to the entire circumference of the shank part of the tool arranged to face the hole.

  The flow path forming component includes a spiral flow path that allows fluid to pass in a spiral shape, and a round hole-shaped flow path that is formed in a round hole shape on the downstream side of the spiral flow path. With this configuration, in a state where the tool is not mounted in the mounting hole, the fluid passing through the spiral channel and the round hole channel is discharged in a conical shape from the tip of the round hole channel. It is considered that the fluid that spirally passes through the spiral channel collides with the inner wall surface of the round hole channel when flowing into the round hole channel and becomes close to a rotating annular flow. When the fluid is discharged from the tip of the round hole-shaped flow path, a rotating annular flow spreads in the radial direction, and a conical flow that expands as it moves away from the tip of the round hole-shaped flow path is formed. Is done. Here, the flow of the cone-shaped fluid is formed in a state where the inside is hollow and the fluid is concentrated on the outer peripheral portion by expanding the rotating annular flow into a tapered shape.

  When the shank part of the tool is mounted in the mounting hole, the tool shank part is once arranged facing the mounting hole. And in the state before this tool is mounted | worn, a fluid is discharged from the front-end | tip of the round hole shaped flow path of flow path formation components. At this time, the fluid discharged from the front end of the round hole-shaped channel into a conical shape in which the inside is hollow and the fluid is concentrated on the outer peripheral portion hits the entire circumference of the shank portion. Thereby, even if the foreign substance has adhered to the shank part, this foreign substance can be effectively removed by the fluid washing | cleaning the perimeter of a shank part.

In the machining center and the tool shank cleaning method using the flow path forming component, the same effects as the flow path forming component can be obtained with the same configuration as the flow path forming component.
Therefore, according to the flow path forming component, the machining center using the same, and the method for cleaning the shank portion of the tool, the entire circumference of the shank portion can be cleaned and foreign matters adhering to the shank portion can be effectively removed. it can.

Sectional explanatory drawing which shows the tool support mechanism of the state with which the rotary tool concerning the Example was mounted | worn in the mounting hole. Cross-sectional explanatory drawing which shows the tool support mechanism of the state which wash | cleans the shank part of the rotary tool arrange | positioned facing the attachment hole concerning an Example. Cross-sectional explanatory drawing shown in the state which decomposed | disassembled the cylindrical body, axial part, and set screw concerning an Example from the tool support mechanism. Explanatory drawing which shows the set screw and communication channel recessed part in the rear-end part of a cylindrical body concerning an Example. The perspective view shown in the state which decomposed | disassembled the cylindrical body, axial part, and set screw concerning an Example. Sectional explanatory drawing which shows the other tool support mechanism in the state which wash | cleans the shank part of the rotary tool arrange | positioned facing the mounting hole concerning an Example.

A preferred embodiment of the above-described flow path forming component, a machining center using the same, and a method for cleaning a shank portion of a tool will be described.
In the flow path forming component, the spiral flow path includes an inner peripheral surface of an insertion hole provided in the flow path forming component and a spiral groove provided on an outer periphery of a shaft portion inserted into the insertion hole. And may be formed.
In this case, the spiral flow path can be easily formed by inserting the shaft portion provided with the spiral groove into the insertion hole.

The round hole-shaped channel is formed to have a smaller diameter than the insertion hole so as to receive the tip surface of the shaft portion, and a tapered portion is provided between the insertion hole and the round hole-shaped channel. It may be formed.
In this case, the formation of the tapered portion can prevent a step portion that blocks the flow of the fluid from being formed between the spiral flow path and the round hole flow path. The tapered portion can smoothly flow the fluid from the spiral channel to the round hole channel, and smoothly forms a state in which the fluid is discharged from the tip of the round hole channel into a conical shape. be able to.

In addition, the flow path forming component allows the fluid to be discharged so as to spread in the conical shape to the entire circumference of the shank portion of the tool arranged to face the mounting hole before being mounted to the mounting hole. It may be configured to hit. In addition, the flow path forming component is configured such that an inclination angle with respect to the center line at an inner peripheral position of the fluid to be discharged so as to spread in the conical shape is equal to or less than an inclination angle with respect to the center line of the shank portion. Also good.
In this case, the conical fluid discharged from the tip of the round hole-shaped channel can be reliably collided with the entire circumference of the shank portion of the tool. Thereby, the perimeter of a shank part can be wash | cleaned more reliably.

In addition, the flow path forming component may be configured to apply the fluid discharged from the round hole-shaped flow path to the mounting hole and then to the entire circumference of the shank portion.
In this case, the trouble of setting the inclination angle of the fluid discharged in a conical shape can be saved. Further, the entire circumference of the mounting hole can be cleaned simultaneously with the cleaning of the entire circumference of the shank portion.

The flow path forming component may be provided with a hooking / retracting portion for hooking a protrusion provided on the shank portion and drawing the shank portion.
In this case, a structure for drawing the shank portion can be formed in the flow path forming component.

The flow path forming component is provided on a rotating spindle of a machining center, the tool is a rotating tool that rotates on the rotating spindle and rotates the workpiece, and the fluid is the rotating spindle. The coolant (cutting oil) discharged from the front-end | tip part of a tool may be sufficient.
In this case, on the rotation spindle of the machining center, it is possible to mount a rotary tool in which no foreign matter is attached to the shank portion in the mounting hole. And the processing precision of the workpiece by a rotary tool can be improved.

In the method for cleaning the shank portion of the tool, the fluid discharged from the round hole-shaped channel is applied to the mounting hole and then applied to the entire circumference of the shank portion, and the fluid from the round hole-shaped channel is used. The discharge state may be maintained, and the shank portion may be brought close to the mounting hole.
In this case, the trouble of setting the inclination angle of the fluid discharged in a conical shape can be saved, and the entire circumference of the mounting hole can be cleaned simultaneously with the cleaning of the entire circumference of the shank portion. In addition, the entire circumference of the shank portion and the entire circumference of the mounting hole can be effectively cleaned in a short time.

Hereinafter, embodiments of a flow path forming component, a machining center using the same, and a method for cleaning a shank portion of a tool will be described with reference to the drawings.
As shown in FIG. 1, the flow path forming component 1 of this example is disposed on the back side of the mounting hole 21 in which the tapered shank portion 51 of the rotary tool 5 as a tool is mounted, and is provided in the rotary tool 5. This is a part for supplying the fluid W to the tool-side channel 53 formed. The flow path forming component 1 is disposed in a tool support mechanism 100 for supporting the rotary tool 5, and forms a supply flow path for supplying the fluid W to the tool side flow path 53.

As shown in FIG. 3, the flow path forming component 1 includes a spiral flow path 24 that allows the fluid W to pass in a spiral shape, and a flow path at the center of the spiral of the spiral flow path 24 on the downstream side of the spiral flow path 24. And a round hole-shaped flow path 32 formed in a round hole shape in which the center of is located. The round hole-shaped channel 32 is a channel part that converts the flow of the spiral fluid W flowing in from the spiral channel 24 into a rotating annular flow, and the inside is hollow and the fluid is concentrated on the outer peripheral portion. It is a flow path portion for discharging the fluid W so as to spread in a conical shape.
As shown in FIG. 2, the tool support mechanism 100 having the flow path forming component 1 passes through the spiral flow path 24, and from the tip 321 of the round hole-shaped flow path 32, the inside is hollow and fluid is concentrated on the outer peripheral portion. The fluid W <b> 1 discharged in a conical shape is configured to be applied to the entire circumference of the outer peripheral surface 513 of the shank portion 51 of the rotary tool 5 disposed to face the mounting hole 21 before being mounted in the mounting hole 21. .

Hereinafter, a cleaning method for the tool support mechanism 100 including the flow path forming component 1 and the shank portion 51 of the rotary tool 5 according to this example will be described in detail with reference to FIGS.
As shown in FIG. 1, the tool of this example is a rotary tool 5 that is rotated by a rotary spindle 10 and performs rotary processing on a workpiece. The rotary tool 5 has a processing blade 52 for performing cutting on the opposite side to the shank portion 51. The tool-side channel 53 is formed from the tip of the shank portion 51 of the rotary tool 5 to the machining blade 52 at the center of the rotary tool 5. The fluid W of this example reduces friction generated between the processing blade 52 and the processing target when the processing target is cut by the processing blade 52 of the rotary tool 5, and cools the processing blade 52. It is a coolant (cutting oil) for smooth machining.

  As shown in FIG. 1, the tool support mechanism 100 having the flow path forming component 1 is provided at the lower end portion of the rotation main shaft 10 of the machining center. The rotation center shaft 10 of the machining center includes a mounting hole 21 and a flow path forming component 1 disposed on the back side of the mounting hole 21 as the tool support mechanism 100. The mounting hole 21 of the tool support mechanism 100 is opened downward. The mounting hole 21 is formed in a tapered shape that increases in diameter as it goes downward along the tapered shape of the shank portion 51.

  The flow path forming component 1 is disposed in the fluid supply hole 11 that communicates with the mounting hole 21 of the tool support mechanism 100. A fluid W is supplied to the fluid supply hole 11, and the fluid W flows from the fluid supply hole 11 to the spiral flow path 24. A protrusion 511 that protrudes radially outward is provided at the tip of the shank 51 of the rotary tool 5. The flow path forming component 1 is provided with a latching retracting portion 23 for latching the protruding portion 511 of the shank portion 51 and pulling the shank portion 51 toward the tool support mechanism 100.

  As shown in FIGS. 3 and 5, the flow path forming component 1 of the present example includes a cylindrical body 3 having a cylindrical shape and a shaft portion 4 inserted into the insertion hole 31 of the cylindrical body 3. . Two spiral grooves 41 are formed on the outer periphery of the shaft portion 4. The spiral groove 41 can be formed in one or more than three. The spiral channel 24 of this example is formed by the inner peripheral surface 311 of the insertion hole 31 of the cylindrical body 3 and the spiral groove 41 on the outer periphery of the shaft portion 4 inserted into the insertion hole 31.

  The cylindrical body 3 is disposed in a case 22 disposed in the fluid supply hole 11. The latching and retracting portion 23 is disposed on the outer peripheral side of the cylindrical body 3 in the case 22. The flow path forming component 1 is formed as a unit component in which a cylindrical body 3, a shaft portion 4, and a latching retracting portion 23 are arranged in a case 22. The flow path forming component 1 is disposed on the tool support mechanism 100 as a unit component.

  As shown in FIG. 1, the distal end portion 33 of the cylindrical body 3 is formed in a tapered shape, and is fitted into the tapered recessed portion 512 at the distal end portion where the projection 511 of the shank portion 51 is formed. When the rotary tool 5 is mounted in the mounting hole 21 of the tool support mechanism 100, the distal end portion 33 of the cylindrical body 3 and the shank portion 51 are connected, and the spiral flow path 24 in the flow path forming component 1 and the rotary tool are connected. 5 communicates with the tool-side flow path 53 in the interior.

As shown in FIG. 3, a round hole-like channel 32 that receives the tip surface of the shaft portion 4 and prevents the shaft portion 4 from coming out from the tip side is smaller in diameter than the insertion hole 31. Is formed. The insertion hole 31 and the round hole-shaped flow path 32 have a cylindrical shape in which round holes are formed in a straight line, and the round hole-shaped flow path 32 is formed with its center coinciding with the center of the insertion hole 31. Has been.
A tapered portion 312 is formed between the insertion hole 31 and the round hole-shaped channel 32 so as to gradually reduce the diameter from the insertion hole 31 and connect to the round hole-shaped channel 32. By forming the tapered portion 312, it is possible to prevent a step portion that blocks the flow of the fluid W from being formed between the insertion hole 31 and the round hole-shaped flow path 32. The flow of the fluid W to the path 32 can be made smooth.

As shown in FIGS. 3 and 4, a set screw 341 that prevents the shaft portion 4 inserted into the insertion hole 31 of the cylindrical body 3 from coming out is screwed into the rear end portion of the cylindrical body 3. . Further, at the rear end portion of the cylindrical body 3, the fluid W passes from the upstream side of the fluid supply hole 11 to the two spiral flow paths 24 on both sides of the screw hole recess 34 to which the set screw 341 is screwed. A communication flow path recess 35 is formed for this purpose.
Here, FIGS. 3 to 5 show a state in which the cylindrical body 3, the shaft portion 4 and the set screw 341 are disassembled from the fluid supply hole 11 of the tool support mechanism 100. FIG. 5 shows a state in which the shaft portion 4 and the set screw 341 are disassembled from the cylindrical body 3.

  As shown in FIGS. 1 and 3, in the tool support mechanism 100 of this example, the cylindrical body 3 and the shaft portion 4 are arranged in the fluid supply hole 11 that supplies the fluid W to the tool-side flow channel 53 of the rotary tool 5. In addition, the spiral flow path 24 that allows the fluid W to pass spirally is formed by the inner peripheral surface 311 of the cylindrical body 3 and the spiral groove 41 of the shaft portion 4. With this configuration, as shown in FIG. 2, in a state where the rotary tool 5 is not mounted in the mounting hole 21 of the tool support mechanism 100, the fluid W has a conical shape in which the inside is hollow and the fluid is concentrated on the outer peripheral portion. It is discharged from the tip 321 of the round hole-shaped flow path 32 of the solid body 3.

  As shown in FIG. 2, the inclination angle θ1 of the conical fluid W1 discharged from the tip 321 of the round hole-shaped channel 32 varies depending on the formation state of the spiral channel 24, the supply pressure of the fluid W, the flow rate, and the like. To do. The inclination angle θ1 of the conical fluid W1 discharged from the tip 321 of the round hole-shaped flow path 32 in this example with respect to the center line O is the inclination angle of the shank portion 51 of the rotary tool 5 (inclination angle of the mounting hole 21). Considering θ2, it is set to be substantially the same as the inclination angle θ2 of the shank part 51 with respect to the center line O or smaller than the inclination angle θ2 of the shank part 51 with respect to the center line O. By setting the inclination angle θ1 of the conical fluid W1 to be equal to or less than the inclination angle θ2 of the shank portion 51, the fluid W1 can be applied to the entire circumference of the shank portion 51 from the small diameter side to the large diameter side. Note that the inclination angle θ1 of the conical fluid W1 is an angle from the center line O to the inner peripheral position of the conical fluid W1.

  The distance between the mounting hole 21 of the tool support mechanism 100 and the shank portion 51 of the rotary tool 5 disposed to face the mounting hole 21 is such that the conical fluid W1 hits the entire circumference of the shank portion 51. Adjust to. Further, when the conical fluid W1 collides with the entire circumference of the shank portion 51, at least one of the tool support mechanism 100 and the rotary tool 5 is moved so that the tool support mechanism 100 and the rotary tool 5 are moved. It is also possible to make the conical fluid W <b> 1 hit the entire circumference of the shank portion 51 by being relatively closer or farther away.

In FIG. 2, the fluid W discharged from the tip 321 of the round hole-shaped flow path 32 is hardly brought into contact with the mounting hole 21 to form the conical fluid W <b> 1, and this conical fluid W <b> 1 is passed through the shank 51. It applies to the entire circumference.
On the other hand, as shown in FIG. 6, a conical fluid W2 is formed by intentionally applying the fluid W discharged from the tip 321 of the round hole-shaped channel 32 to the mounting hole 21, and this conical fluid W2 is formed. Can also be applied to the entire circumference of the full length of the shank portion 51. The fluid W discharged from the tip 321 of the round hole-shaped channel 32 can be intentionally applied to the mounting hole 21 by adjusting the formation state of the spiral channel 24, the supply pressure of the fluid W, the flow rate, and the like. it can.

  In the case of FIG. 6, when the fluid W hits the mounting hole 21, the inclination angle of the outer peripheral position of the conical fluid W <b> 2 is changed to the center line O between the inner peripheral surface of the mounting hole 21 and the outer peripheral surface 513 of the shank portion 51. Can be made substantially the same as the inclination angle θ3. Further, in this case, the inclination angle of the inner peripheral position of the conical fluid W2 after the fluid W hits the mounting hole 21 is set to the center of the inner peripheral surface of the mounting hole 21 and the outer peripheral surface 513 of the shank portion 51. The inclination angle θ3 with respect to the line O can be made smaller. In addition, it is possible to save the trouble of setting or adjusting the inclination angle of the conical fluid W2. Further, in this case, the entire circumference of the entire length of the mounting hole 21 can be cleaned at the same time that the fluid W hits the entire circumference of the mounting hole 21 and at the same time the entire length of the mounting hole 21 can be cleaned. . Furthermore, since the fluid W can be applied at a large angle with respect to the inner peripheral surface of the mounting hole 21 and the outer peripheral surface 513 of the shank portion 51, foreign matters can be effectively removed.

Next, a method for cleaning the shank portion 51 of the rotary tool 5 using the tool support mechanism 100 having the flow path forming component 1 of this example will be described, and the function and effect of this example will be described.
As shown in FIG. 2, when the shank portion 51 of the rotary tool 5 is mounted in the mounting hole 21 of the tool support mechanism 100, the shank portion 51 of the rotary tool 5 is temporarily arranged facing the mounting hole 21. Then, in a state before the rotary tool 5 is mounted, the fluid W supplied to the fluid supply hole 11 of the tool support mechanism 100 is supplied to the communication channel recess 35, the spiral channel 24, and the round hole channel 32. And is discharged from the tip 321 of the round hole-shaped flow path 32.

  At this time, the fluid W that spirally passes through the spiral flow path 24 collides with the inner wall surface of the round hole flow path 32 when flowing into the round hole flow path 32 and turns into a rotating annular flow. It will be close. When the fluid W is discharged from the tip 321 of the round hole-shaped channel 32, the rotating annular flow spreads in the radial direction, and the diameter of the cone increases as the distance from the tip 321 of the round-hole channel 32 increases. A flow of shape is formed. The flow of the conical fluid W <b> 1 is formed in a state where the inside is hollow and the fluid is concentrated on the outer peripheral portion by expanding the rotating annular flow into a tapered shape.

  The fluid W <b> 1 discharged from the tip 321 of the round hole-shaped flow path 32 into a conical shape in which the inside is hollow and the fluid is concentrated on the outer peripheral portion hits the entire periphery of the outer peripheral surface 513 of the shank portion 51. Thereby, even if the foreign substance has adhered to the outer peripheral surface 513 of the shank part 51, this foreign substance can be effectively removed by the fluid W1 washing | cleaning the perimeter of the outer peripheral surface 513 of the shank part 51. .

  Next, after the cleaning of the shank portion 51 of the rotary tool 5 is finished, as shown in FIG. 1, the protrusion portion 511 of the shank portion 51 is hooked and pulled by the hooking and pulling portion 23 in the tool support mechanism 100 and rotated. The shank part 51 of the tool 5 is mounted in the mounting hole 21 of the tool support mechanism 100. At this time, the tool-side flow path 53 of the rotary tool 5 is communicated with the round hole-shaped flow path 32 in the cylindrical body 3 in the tool support mechanism 100. Then, the fluid W supplied to the fluid supply hole 11 passes through the communication channel recess 35, the spiral channel 24, and the round hole channel 32, and is supplied to the tool side channel 53, near the machining blade 52. It is discharged from. Thereby, smooth cutting with the rotary tool 5 can be performed.

Further, the shank portion 51 of the rotary tool 5 can be cleaned as follows.
Specifically, after the shank portion 51 of the rotary tool 5 is disposed so as to face the mounting hole 21, the fluid W is discharged from the tip 321 of the round hole-shaped channel 32. At this time, the fluid W hits the entire circumference of the outer peripheral surface 513 of the shank portion 51 after hitting the entire circumference of the inner peripheral surface of the mounting hole 21. And the discharge state of the fluid W from the front-end | tip 321 of the round hole-shaped flow path 32 is maintained, the rotary tool 5 is moved, and the shank part 51 is made to approach the mounting hole 21. FIG. At this time, the fluid W after hitting the mounting hole 21 can be applied to the outer peripheral surface 513 of the shank portion 51 more strongly. Then, immediately before the shank part 51 is mounted in the mounting hole 21, the discharge of the fluid W from the tip 321 of the round hole-shaped channel 32 is stopped. Note that the discharge of the fluid W can be continued until the shank portion 51 is mounted in the mounting hole 21.

  Therefore, according to the cleaning method for the shank portion 51 of the tool support mechanism 100 having the flow path forming component 1 and the rotary tool 5 of this example, the entire circumference of the outer peripheral surface 513 of the shank portion 51 is cleaned, and the shank portion 51 is cleaned. The foreign matter adhering to the outer peripheral surface 513 can be effectively removed.

DESCRIPTION OF SYMBOLS 1 Flow path formation part 10 Rotation main shaft 100 Tool support mechanism 21 Mounting hole 24 Spiral flow path 3 Cylindrical body 31 Insertion hole 311 Inner peripheral surface 312 Tapered part 32 Round hole flow path 4 Shaft part 41 Helical groove 5 Rotating tool (tool)
51 Shank 53 Flow path on the tool side

Claims (11)

A taper-shaped shank portion in the tool is disposed on the back side of the mounting hole where the tool is mounted, and is a flow path forming component for supplying fluid to the tool side flow path provided in the tool,
A spiral flow path for allowing the fluid to pass through in a spiral shape, and a round hole shape in which the center of the flow path is located at the center of the spiral of the spiral flow path on the downstream side of the spiral flow path. and possess a round hole-like flow path for discharging so as to spread in a conical shape having a cavity,
A flow path forming component characterized in that a cross-sectional area of an opening tip position of the round hole-shaped flow path is larger than a total cross-sectional area perpendicular to the flow path forming direction of the spiral flow path .   The spiral flow path is formed by an inner peripheral surface of an insertion hole provided in the flow path forming component and a spiral groove provided on an outer periphery of a shaft portion inserted into the insertion hole. The flow path forming component according to claim 1. The round hole-shaped flow path is formed with a smaller diameter than the insertion hole so as to receive the tip surface of the shaft portion,
The flow path forming component according to claim 2, wherein a tapered portion is formed between the insertion hole and the round hole-shaped flow path.   The fluid to be discharged so as to spread in the conical shape is configured to be applied to the entire circumference of the shank portion of the tool arranged to face the mounting hole before being mounted to the mounting hole. The flow path forming component according to any one of claims 1 to 3.   5. The configuration according to claim 4, wherein an inclination angle with respect to a center line at an inner peripheral position of the fluid discharged so as to spread in the conical shape is equal to or less than an inclination angle of the shank portion with respect to the center line. The flow path forming component described.   6. The flow path forming component according to claim 4, wherein the fluid discharged from the round hole flow path is applied to the entire circumference of the shank portion after being applied to the mounting hole. .   The flow path forming component is provided with a latching retracting portion for latching a protrusion provided on the shank portion and retracting the shank portion. The flow path forming component according to any one of the above. The flow path forming component is provided on the rotating main shaft of the machining center,
The tool is a rotary tool that is rotated by the rotary spindle and performs rotation processing on a workpiece.
The flow path forming component according to claim 1, wherein the fluid is a coolant discharged from a tip portion of the rotary tool. A machining center configured using the flow path forming component according to any one of claims 1 to 7,
The rotating spindle of the machining center has the mounting hole and the flow path forming component disposed on the back side of the mounting hole.
The tool is a rotary tool that is rotated by the rotary spindle and performs rotation processing on a workpiece.
A machining center using a flow path forming component, wherein the fluid is a coolant discharged from a tip portion of the rotary tool. A taper-shaped shank portion in the tool is disposed on the back side of the mounting hole in which the tool is mounted, and a flow path forming component for supplying fluid to the tool side flow path provided in the tool is used. A method of cleaning the shank part,
The flow path forming component includes a spiral flow path that allows the fluid to pass in a spiral shape, and a round shape in which the center of the flow path is located at the center of the spiral of the spiral flow path on the downstream side of the spiral flow path. A hole-shaped round hole-shaped channel is formed,
The cross-sectional area of the opening tip position of the round hole channel is larger than the total cross-sectional area orthogonal to the channel formation direction of the spiral channel,
The fluid that passes through the spiral channel and the round hole channel is discharged from the tip of the round hole channel so as to spread in a conical shape having a cavity, and the fluid is attached before being attached to the mounting hole. A method for cleaning a shank portion of a tool, which is applied to the entire circumference of the shank portion of the tool arranged to face a hole.   The fluid to be discharged from the round hole channel is applied to the mounting hole, and then applied to the entire circumference of the shank portion, and the fluid discharge state from the round hole channel is maintained, and the shank portion is maintained. The method for cleaning a shank portion of a tool according to claim 10, wherein the tool is made to approach the mounting hole.

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