JPH077054Y2 - Face milling chip remover - Google Patents

Description

[Detailed Description of the Invention] [Industrial application] The present invention relates to a face milling cutter used for plane cutting, and more particularly to a face milling cutter capable of preventing a cutting edge from being damaged due to biting of cutting or the like.

[Prior Art] As a face milling machine used for flat machining of a work material,
For example, the ones shown in FIGS. 8 to 10 are conventionally known.

As shown in these drawings, this front milling cutter has a substantially cylindrical shape on the outer periphery of the tip of the cutter body 1.
A plurality of concave grooves 2 opening toward the front end surface and the outer peripheral surface are formed at equal intervals in the circumferential direction, and throw-away chips (hereinafter abbreviated as chips) 3 are formed in the concave grooves 2 by means of clamp screws 4. On the outer peripheral surface of the cutter body 1 facing the rake face 3a of each chip 3, a chip pocket 6 having a wall surface arc shape is formed, and the center of the cutter body 1 is further attached while being detachably mounted by the wedge member 5 to be tightened. A center hole 7 is formed through the cutter body 1 in the axial direction.

The face milling machine configured as described above is fastened with the tightening bolts 12 after the center hole 7 is fitted to the fitting shaft 11 of the arbor 10 which is attached to the main shaft 8 of the machine body via the key 9. Integrated with the spindle 8. Then, in this state, the cutter body 1 is rotated around the axis by the main shaft 8 and is sent in the direction orthogonal to the axis, and the chip 3 is adapted to perform the planar processing of the work material. The generated chips are guided from the rake face 3a to the wall surface of the chip pocket 6 and rounded, and then the cutter body 1
Is discharged outward in the circumferential direction.

[Problems to be Solved by the Invention] By the way, when cutting is performed using the above-described conventional face milling, the generated chips are gradually accumulated on the work material, and thus the accumulated chips are chipped. There were cases where the cutting edge of No. 3 was bitten and the cutting edge was damaged or the cutting surface was damaged.

In order to prevent such chips from being caught, for example, in a tool such as a drill or an end mill, an oil supply block provided on the front surface of the spindle is engaged with the outer peripheral side of a tool holder that grips the base end side of the tool body. While the guide member is rotatably arranged with respect to the cutter body, a spiral pump or a vane pump is built inside the tool holder to guide the cutting oil supplied from the oil supply block to the pump via the guide member. There is provided a device in which cutting oil discharged from these pumps is ejected from the tip of the tool body through an oil hole formed inside the tool body to remove chips.

However, since the above-described tool supplies cutting oil by utilizing the oil holes formed in the tool body, the pump rotor and the guide described above are provided between the base end of the tool body and the main shaft 8. It is necessary to interpose all components such as members,
As a result, the total length of the tool is lengthened and the rigidity of the connecting portion between the tool body and the spindle is impaired, so that the rigidity of the entire tool is unavoidably reduced. If such a product is applied to a face milling cutter that requires particularly high rigidity, the rigidity may be insufficient, which is not preferable. Therefore, a face milling cutter having a structure capable of successively removing chips generated during cutting is still provided. The reality is not.

The present invention has been made in view of the above circumstances, and the generated chips are sequentially excluded from the periphery of the cutting edge chip, whereby the chips can be prevented from being caught in the cutting edge, and sufficient rigidity is ensured. An object of the present invention is to provide a chip removing device for a face milling machine.

[Means for Solving the Problems] In order to solve the above problems, in the chip milling device for a front milling cutter of the present invention, a cylinder body is provided around the cutter body to cover the cutter body, and a tip opening of the cylinder body is provided. The portion is located near the cutting blade tip and forms a small gap over the entire circumference with the cutter body, so that the base end of the cutter body is provided between the inner surface of the cylinder and the outer surface of the cutter body. A channel extending from the side toward the tip side and opening toward the cutting edge tip is formed, the cutter body proximal end side in this channel, a suction port that communicates the inside and outside of the channel is formed, Further, the above-mentioned flow passage is provided with a blowing means for blowing the air in the flow passage toward the opening at the tip thereof.

As the air blowing means, blades which are arranged on the peripheral surface side of the cutter body at equal intervals in the circumferential direction and gradually incline rearward in the cutter rotation direction from the base end side to the tip side of the cutter body are suitable. ing.

Further, particularly in the case of a large-diameter tool, the blower means is provided on the base end face side of the cutter body at a circumferential interval, and the cutter is gradually rotated from the center of the cutter body outward in the radial direction. A first blade that is curved rearward in the direction,
On the other hand, the second blade is provided on the peripheral surface side of the cutter body at a circumferential interval and gradually inclines rearward in the cutter rotation direction from the base end side to the tip side of the cutter body. It is preferable that the suction port is provided at a position near the axis of the cutter body proximal end side.

[Operation] According to the chip removing device for the face milling cutter having the above-described configuration, the air blower provided in the flow passage formed between the surface of the cutter body and the inner surface of the cylindrical body causes the air in the flow passage to flow. Since air is blown toward the opening at the tip of the road, air is ejected from the opening of the flow path toward the cutting blade chip, and the chips are blown out of the cutter body.

Also, in the case where blades are formed on the peripheral surface side of the cutter body, the air on the base body of the cutter body is pressed against the blades as the cutter body rotates, and is guided to the tip side of the cutter body along the blades. It is blown out and ejected from the opening of the flow path.

Further, in the case where the first blade is arranged on the base end face side of the cutter body and the first blade is arranged on the peripheral face side of the cutter body, the cutter is generated by centrifugal force generated as the cutter body rotates. The air on the center side of the base end face is guided to the peripheral surface side of the cutter body along the first blade, and accordingly, air is sequentially sucked from the suction port formed on the center side of the base end face of the cutter body. . Then, the air guided to the peripheral surface side of the cutter body is guided to the tip side of the cutter body along the second blade and is ejected from the processing of the flow path toward the cutting blade chip.

[First Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

In FIG. 1 and FIG. 2, reference numeral 13 is a cutter body.
The cutter body 13 is a substantially cylindrical body having a center hole 14 formed in the center thereof, and a plurality of flat-plate chips 15 are circumferentially formed by a clamp mechanism (not shown) on the outer periphery of the enlarged diameter portion of the tip. 15 chips are attached at equal intervals so that they can be attached and removed freely.
The corner blade 16 is slightly protruded from the tip of the cutter body 13. Also, in front of the rake face 15a of each chip 15,
A chip pocket (not shown) is formed so as to open toward the tip side and the peripheral surface side of the cutter body 13.

The center hole 14 of the cutter body 13 is fitted in a shaft portion 18 formed at the tip of the arbor 17, and the tightening screw 19 screwed into the shaft portion 18 moves the cutter body 13 in the axial direction. It is regulated and integrated with Arbor 17.

This arbor 17 is for connecting the cutter body 13 and the main shaft 20 of the machine main body, and the tapered shank 21 formed on the base end side of the arbor 17 is fitted into the tapered hole 22 of the main shaft 20 to form a main shaft.
It is aligned with 20. And flange of arbor 17
The key groove 24 formed in 23 is engaged with the key 25 at the tip of the main shaft 20, and in this state, the shank 21 is screwed into a drawing bolt (not shown) inserted into the main shaft 20,
The arbor 17 is adapted to be connected to the main shaft 20.

On the other hand, on the outside of the peripheral surface of the cutter body 13, a cylindrical body 26 is provided which opens toward the tip side of the cutter body 13. The cylindrical body 26 has a fitting hole 26a formed at the base end thereof, fitted with a shield bearing 29 fitted into the intermediate shaft portion 27 of the arbor 17 and locked with a retaining ring 28, Bearing retainer 30 fitted on the opposite side of the shield bearing 29
And a bolt 31 and are connected to the cutter body 13 so as to be rotatable.

The tip of the cylindrical body 26 is extended to a position covering the upper portion of a chip pocket (not shown) formed on the outer periphery of the tip portion of the cutter body 13, and the inner diameter of the tip portion is the same as that of the tip enlarged diameter portion of the cutter body 13. It is said that there is a slight gap between them. Further, a flow path 32 extending from the base end side of the cutter body 13 toward the tip end side is formed between the inner peripheral surface of the cylindrical body 26 from the intermediate portion to the base end side and the outer peripheral surface of the cutter body 13. There is.

The tip of the flow path 32 communicates with the opening 26b of the cylindrical body 26. On the other hand, the base end side of the flow path 32 is airtightly isolated from the shield bearing 29 side by the seal ring 34 fitted in the small diameter portion 33 of the tubular body 26. The proximal end side of the flow path 32 is communicated with the outside by a suction port 35 that penetrates the intermediate shaft portion 27 of the arbor 17 and the flange 23.

A thrust washer 36 is fitted on the shaft portion 18 of the arbor 17. The thrust washer 36 is attached to the base end surface of the cutter body 13 and the arbor 17 which are tightened with the tightening bolt 19.
It is sandwiched between the front end surface of the shaft portion 18 and its axial movement. In addition, the thrust washer 36
A key 37 interposed between the arbor 17 and the arbor 17 prevents its rotation. Also, thrust washers
A key (not shown) is also interposed between the 36 and the cutter body 13,
As a result, the rotation of the main shaft 20 is transmitted to the cutter body 13 via the arbor 17 and the thrust washer 36.

Further, eight blades (blowing means) 38 are provided on the circumferential surface of the thrust washer 36 at equal intervals in the circumferential direction. Each of these blades 36 gradually moves in the direction of rotation of the cutter from the base end side to the tip end side of the cutter body 13 (in each figure,
It is formed in the shape of an arc-shaped curved arc wing on the rear side in the (Y1 direction).

In the front milling cutter configured as described above, after the cutter body 13 is connected to the spindle 20 via the arbor 17, the cutter body 13 is rotated in the Y1 direction about the axis and is orthogonal to the axis. Direction, the corner blade 16 of the chip 15 cuts the work material accordingly.

At this time, the blades formed on the peripheral surface of the thrust washer 36
Air on the base end side of the flow path 32 is pressed against the 38 as the cutter body 13 rotates. Then, the pressed air is guided to the tip side of the flow path 32 along the blades 38. Therefore, a negative pressure is generated in the flow channel 32 on the proximal end side of the cutter body 13, and air is gradually sucked from the suction port 35 into the flow channel 32 accordingly.

Then, the air guided to the tip end side of the flow path 32 is compressed in front of the flow path 32 because the flow path 32 communicates with the opening 26b of the cylindrical body 26 and is narrowed down, and the circumference of the cutter body 13 is increased. It is ejected toward the chip 15 from a chip pocket formed at a position facing the opening 26b of the surface. This allows the chip 15
Chips generated along the rake face 15a of the cutter body 13
Is successively blown away.

As described above, according to the present embodiment, the chips are blown off and do not accumulate on the work material, so the corner blade of the chip 15
The chips are not caught in the 16, so that the cutting edge is not damaged and the cutting surface is surely prevented from being damaged.

In addition, the front milling cutter of this embodiment has blades 38 in the flow passage 32 formed between the inner peripheral surface of the cylindrical body 26 and the peripheral surface of the cutter body 13.
Since the structure is provided, the overall length is shortened as compared with the case where the components such as the flow path 32 and the blades 38 are built in between the base end surface of the cutter body 13 and the tip end surface of the main shaft 20. Also, the rigidity of the connecting portion between the spindle 20 and the cutter body 13 is sufficiently secured, so that the rigidity of the entire tool is not impaired.

In the present embodiment, the cylinder 26 is especially
Since it is rotatably provided, when the amount of air ejected from the opening 26b of the tubular body 26 is insufficient, connect an air hose or the like to the proximal end side of the tubular body 26 to send compressed air. You can However, particularly when the air sucked from the suction port 35 is sufficient, it is not necessary to rotatably support the cylindrical body 26, and the cylindrical body 26 may be directly fixed to the arbor 17.

In this embodiment, the tip of the cutter body 50 is especially
Although a so-called throwaway type front milling cutter, which is detachably mounted, has been described, the present invention is not limited to this, and a face milling machine to which a chip is brazed is naturally applicable.

Further, in the present embodiment, especially the tip of the flow path 32 is a cylindrical body.
The front face milling cutter of the present invention is not limited to this. For example, as shown in FIG. 3, a seal ring is provided between the front end of the tubular body 26 and the peripheral surface of the cutter body 13. The air may be airtightly closed by 39 and the air sent by the blades 38 may be guided to the vicinity of the chip 15 via the second flow passage 40 formed in the enlarged diameter portion of the tip of the cutter body 13. In this modification, the base end of the tubular body 26 is not supported by the arbor 17, but is fixed to the front surface of the spindle head 41 that rotatably supports the spindle 20, and the suction port to the flow path 32 is provided. Considering the convenience of connecting the air hose, the nipple 42 is screwed into the peripheral surface of the cylindrical body 26 on the base end side. Further, the blades 38 are also integrally formed on the peripheral surface of the intermediate shaft portion 27 of the arbor 17 in order to further improve the tool rigidity, and accordingly, the rotation transmission from the arbor 17 to the cutter body 13 is covered by one key 43. Has become.

[Second Embodiment] Next, a second embodiment of the present invention will be described with reference to FIGS. 4 to 7.

In FIGS. 4 to 7, reference numeral 50 is a cutter body. The cutter body 50 is a substantially cylindrical body having a center hole 51 formed in the center thereof, and a chip 52 having a flat plate shape is tightened with a clamp screw 54 in a groove 52 formed on the outer circumference of the enlarged diameter portion of the tip. It is detachably attached by a wedge member 55 to be inserted, and a corner blade 56 of each chip 53 is slightly projected from the tip end surface of the cutter body 50. A chip pocket 57 having a substantially arcuate wall surface is formed on the outer peripheral surface of the cutter body 50 at a position facing the chip rake surface 53a.

As shown in FIGS. 4 and 5, the proximal end side of the cutter body 50 is fitted with the adapter 58. A center plug 59 fitted to the center of the base end of the adapter 58 is fitted to the main shaft 60 of the machine body to be aligned. Then, the adapter 58 is tightened in the axial direction by a plurality of bolts 62 in a state in which the key 61 formed in the base end surface thereof is engaged with the main shaft 60 and its rotation is restricted, and is integrally formed with the main shaft 60. It is connected.

On the tip side of the adapter 58, a tightening washer 63 is
Connected by 64. On the peripheral surface of the tightening washer 63, protrusions 65 extending inward in the radial direction are formed at equal intervals in the peripheral direction. These projections 65 are adapted to be engaged with the small diameter portion 66 formed in the center hole 51 of the cutter body 50, whereby the cutter body 50 is restricted from moving in the axial direction. Has become.

A key 67 is attached to the tip surface of the adapter 58. The key 67 is engaged with a key groove 68 formed in the tightening washer 63, and is fitted in the notch 69 formed by notching the small diameter portion 66 of the cutter body 50 at equal intervals in the circumferential direction so as to be free to move in the circumferential direction. When the small diameter portion 66 of the cutter body 50 and the protrusion 65 of the tightening washer 63 are engaged with each other, the cutout portion 69 engages with the front wall surface in the cutter rotation direction (Y2 direction in FIG. 5). The rotation of the adapter 58 can be transmitted to the cutter body 50 and the tightening washer 63.

As shown in FIG. 4 and FIG. 6, the portion from the peripheral surface of the main shaft 60 to the peripheral surface of the tip portion of the cutter body 50 has
Is covered with a tubular body 70 that opens toward the tip side of the. The cylindrical body 70 is fixed at its base end side with a bolt 72 to the front surface of a spindle head 71 of a machine body that supports the spindle 60.
It is possible to stand still with respect to the rotation.

Further, the tip of the tubular body 70 is extended to a position that covers the upper portion of the chip pocket 57 formed on the peripheral surface of the cutter body 50, and the inner diameter thereof has a slight gap between the tip peripheral surface of the cutter body 50. The degree is good.

The base end portion of the tubular body 70 is reduced in diameter according to the diameter of the main shaft 60, and the inner surface from the base end portion to the tip end portion,
A flow path 73 is formed between the main shaft 60, the adapter 58 and the surface of the cutter body 50 so as to extend from the peripheral surface side of the main shaft 60 toward the tip side of the cutter body 50. The tip of this flow path 73 is communicated with the tip opening 70b of the tubular body 70, and
The base end side is communicated with the outside by a suction port 74 formed by penetrating the base end portion of the tubular body 70 in the radial direction.

Further, as shown in FIG. 6 and FIG. 7, on the peripheral surfaces of the adapter 58 and the cutter body 50 facing the flow path 73, the blades for sending the air in the flow path 73 to the tip opening 70b of the tubular body 70. (Blower means) 75 is formed.

A plurality of the blades 75 are formed on the base end surface of the adapter 58 at equal intervals in the circumferential direction, and a plurality of blades 75 are formed on the peripheral surfaces of the adapter 58 and the cutter body 50 at equal intervals in the circumferential direction. The first blade 76 is formed of a second blade 77, and the first blade 76 is formed in the shape of a spiral blade that gradually curves rearward in the cutter rotation direction (Y2 direction in the drawing) as it goes radially outward of the adapter 58. The second blade 77 is formed in the shape of an arc blade that is curved in an arc shape toward the rear side in the rotational direction of the cutter.

In order to perform plane cutting using the face milling cutter configured as described above, the adapter 58 is first connected to the spindle 60, and then the notch 69 of the cutter body 50 is made to correspond to the protrusion 65 of the tightening washer 63. Above, the cutter body 50 is pushed into the adapter 58 side and the base end side is fitted with the adapter 58. Then, insert the cutter body 50 into the small diameter portion 66 and the protrusion 65 of the tightening washer 63.
Rotate to the position where and engage, and then tighten the connecting bolt 64.

As a result, the cutter body 50 is sandwiched between the adapter 58 and the tightening washer 63 to prevent its movement in the axial direction, and the key 67 fitted in the notch 69 causes the cutter rotating direction (see FIG. 5). Rotation in the opposite direction with respect to the Y2 direction) is blocked, and the cutter body 50 is connected to the main shaft 60.

After the work of mounting the cutter body 50 on the spindle 60 is completed, the cutter body 50 is rotated around the axis and is fed in the direction orthogonal to the axis to cut the work material with the corner blade 56 of the chip 53. .

At this time, the first blade formed on the base end surface of the adapter 58
The air on the center side of the 76 is pushed forward by the rotation of the first blade 76 in the direction of rotation of the cutter, but a centrifugal force directed outward in the radial direction of the cutter body 50 acts on these air at the same time. As for the air near the peripheral surface of the main shaft 60,
Is guided to the peripheral surface side of the adapter 58 along the blades 76 of the. Therefore, a negative pressure is generated in the vicinity of the peripheral surface of the main shaft 60 inside the flow path 73, and the outside air is sequentially sucked into the flow path 73 from the suction port 74, so that the first air is sucked.
It is supplied to the center side of the vane 76.

On the other hand, the air guided to the vicinity of the peripheral surface of the adapter 58 by the first blade 76 is pressed against the second blade 77 formed immediately below the peripheral edge portion of the first blade 76, and then the second blade 77 is pressed. It is guided along the distal end side of the flow path 73. Then, the air guided to the tip end side of the flow path 73 is compressed and increased in pressure before the opening 70b of the tubular body 70 is narrowed in comparison with the flow path 73, and the circumference of the cutter body 50 is increased. It is ejected toward a chip 53 from a chip pocket 57 formed at a position facing the opening 70b of the surface.

As a result, the chips generated along the rake face 53a of the chip 53 are successively blown out of the cutter body 50 without accumulating on the work material around the cutter body 50.

If it becomes necessary to replace the chip 53 during cutting, loosen the connecting bolt 64, and then set only the cutter body 50 to Y2.
Rotation direction to release the engagement between the protrusion 65 of the tightening washer 63 and the small diameter portion 66 of the cutter body 50, and then the cutter body 50.
Is taken out from the inside of the cylinder 70. Then, the chip 53 may be removed from the cutter body 50 and replaced with a new chip, and then the cutter body 50 may be engaged again with the tightening washer 63 and connected to the adapter 58.

As described above, according to the front milling cutter of the present embodiment, the cylindrical body is similar to the front milling cutter of the first embodiment described above.
Since chips are blown off by the air ejected from the tip of 70, chipping of the cutting edge and damage to the cutting surface are reliably prevented.

In addition, since the blades 75 and the flow paths 73 required for chip removal do not exist in the connecting portion from the main shaft 60 to the main body 50 of the cutter, the overall length of the structure is significantly shortened compared with the conventional structure. In addition, the rigidity of the connecting portion is sufficiently secured, so that the rigidity of the entire tool is not impaired.

Further, in this embodiment, since the first blade 76 for sending out air by utilizing the centrifugal force is formed on the base end surface of the adapter 58, it is applied to a large diameter tool having a large difference in centrifugal force between the tool central portion and the peripheral edge portion. In this case, the air is efficiently pumped by the first blade 76 to increase both the amount and the pressure of the air discharged from the opening 70b, and an extremely excellent chip removing ability is obtained.

Furthermore, in this embodiment, the cutter body 50 can be attached and detached only by operating the connecting bolt 64 with the tightening washer 63 and the cutter body 50 engaged, and when operating the connecting bolt 64, the cutter body 50 can be removed. Does not have to be supported by the operator. Therefore, although the outer peripheral surface of the cutter body 50 is covered with the tubular body 70 and is difficult to hold, the workability of the cutter replacement work is not impaired.

It should be noted that the structure of the present embodiment is merely an example, and various modifications are made in the same manner as the above-described first embodiment, such as changing the support structure of the tubular body 70 or changing the opening shape of the tip of the flow path 73. It is possible.

In addition, in this embodiment, in order to improve the chip removal efficiency by utilizing the centrifugal force caused by the rotation of the tool, the spiral blade-shaped first blade 76 is formed on the base end surface of the adapter 58, and the adapter 58 is formed.
Although the space between the cylindrical body 70 and the cylindrical body 70 is configured as a centrifugal pump, the front milling cutter of the present invention is not limited to this, and the peripheral surface of the adapter 58 and the cylindrical body 70 are not limited thereto.
It is also possible to incorporate a vane pump between the inner peripheral surface and the inner peripheral surface. As a specific structure thereof, for example, a shaft portion that is eccentric with respect to the axis of the adapter 58 is formed on the base end side of the adapter 58, and a blade that is in close contact with the inner peripheral surface of the tubular body 70 is formed around the shaft portion. Various types are conceivable, such as a plurality of them arranged in the direction.

[Effect of the Invention] As described above, according to the present invention, the air in the flow path is moved to the front end side of the flow path by the air blower in the flow path formed between the inner surface of the cylinder and the surface of the cutter body. Since the air is blown and ejected toward the cutting blade chip, the generated chips are successively blown out of the cutter body without accumulating around the cutter body. For this reason, chips are not caught in the cutting edge chip, and damage to the cutting edge or the cutting surface is reliably prevented.

Moreover, the air in the flow path is increased due to the fact that a small gap between the cylindrical opening forming the tip of the flow path and the main body of the cutter is provided over the entire circumference and the blowing action of the blowing means. In addition, since the air in the flow path is blown directly on the chips generated by the plurality of cutting blade chips at the predetermined intervals at a position close to the tip of the flow path, it is blown outward by a strong pressure. become. Therefore, it is possible to reliably prevent the cutting edge from being damaged and the cutting surface from being damaged. Moreover, while the cutter body rotates and each chip revolves to generate chips, air can be constantly blown to each chip to reliably and simultaneously blow off each chip.

In addition, according to this invention, since there is no component for removing chips in the connecting portion between the cutter body and the main shaft, the total length of the tool is significantly reduced and the rigidity of the connecting portion is not impaired at all. Therefore, even a face milling cutter that requires particularly high rigidity can sufficiently withstand practical use.

Further, the blower means is composed of a first blade arranged on the base end surface side of the cutter body and a second blade formed on the peripheral surface side of the cutter body, and the suction port is formed of the first blade. With the blade provided on the center side of the blade, air is efficiently ejected from the opening of the flow path by the centrifugal force generated by the rotation of the cutter body, so it is used especially for large diameter tools with large centrifugal force at the peripheral edge. In this case, extremely excellent chip removing ability is obtained.

[Brief description of drawings]

1 and 2 show a first embodiment of the present invention.
1 is an axial sectional view, FIG. 2 is a sectional view taken along the line AA in FIG. 1, FIG. 3 is an axial sectional view showing a modified example of the first embodiment, and FIGS. 4 to 7 are FIG. 4 shows a second embodiment of the present invention, FIG. 4 is an axial sectional view, FIG. 5 is a bottom view, and FIG.
FIG. 7 is a side view of the cutter body, FIG. 7 is a sectional view taken along the line BB of FIG. 6, and FIGS. 8 to 10 show a conventional face mill, and FIG. 8 is an axial sectional view. FIG. 9 is a bottom view, and FIG. 10 is an enlarged view of the tip of the cutter body. 13, 50 …… Cutter body, 15, 53 …… Throw-away chip, 26, 70 …… Cylindrical body, 32, 73 …… Flow path, 35, 74 …… Suction port, 38, 75 …… Blade (Blower means ), 76 ... the first blade,
77 …… Second blade.

Claims (3)

[Scope of utility model registration request] 1. A front milling cutter in which a plurality of cutting blade tips are attached to a tip outer peripheral portion of a cutter body which is rotated about an axis at predetermined intervals, and a cylindrical body which covers the cutter body is arranged around the cutter body. The inner surface of the cylindrical body and the outer surface of the cutter body are provided by forming a small gap over the entire circumference between the tip opening portion of the cylinder body and the cutting blade tip located near the cutting blade tip. A channel extending from the base end side of the cutter body toward the tip side and opening toward the cutting edge tip is formed between the inside and outside of the cutter body base end side. To form a suction port, and further inside the flow path,
A chip removing device for a face mill, characterized in that a blower means for blowing the air in the flow path toward the front end side of the flow path is provided. 2. The blower means is provided on the peripheral surface side of the cutter body at a circumferential interval, and gradually inclines rearward in the cutter rotation direction from the base end side to the tip end side of the cutter body. The chip removing device for a face milling cutter according to claim 1, which is a blade. 3. The blower means is provided on the base end face side of the cutter body at a circumferential interval, and is gradually curved rearward in the cutter rotation direction as it extends radially outward from the center of the cutter body. A first blade and a second blade provided on the peripheral surface side of the cutter body at a circumferential interval and gradually inclined rearward in the cutter rotation direction from the base end side to the tip side of the cutter body. The chip removing device for a face milling cutter according to claim 1, wherein the suction port is provided at a position closer to the axis on the base end side of the cutter body.