JP2006281385A - Face milling cutter and working method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent reduction of life of a cutting blade in face milling cutter work of a cutting work on which a water soluble cutting fluid resides. <P>SOLUTION: This face milling cutter 1 is constituted by arranging a plurality of the cutting blades 11 with roughly equal intervals between them in the circumferential direction on a head end outer peripheral part of a tool main body 2 rotating around a shaft center CL and forming at least one of a first supply hole 60 to introduce fluid supplied from outside in the inside of the tool main body 2, the first supply hole 60 has an opening part 62 extending toward the tool outer peripheral side and is devised to direct itself to the front in the tool rotating direction K of at least one optional one of the cutting blades 11 on the opening part 62 and to remove the soluble cutting fluid residing in a part to cut by compressed air jetted from the opening part 62 by flowing through the first supply hole 60. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention relates to a face mill with a supply hole inside a tool body and a machining method.

Conventionally, when face milling is performed with a machining center, a drilling process usually uses a liquid such as a water-soluble cutting fluid. For this reason, the liquid remains on the surface of the work material, and the recesses such as the processed hole and the cast hole. When a face mill is used in the subsequent process, the remaining liquid comes into contact with the cutting blade being cut.

When liquids such as water-soluble cutting fluid come into contact with face milling, the life of the cutting blade is extremely shortened. The reason is that the face milling is intermittent cutting, the cutting edge becomes hot during cutting, and the cutting edge is rapidly cooled when it comes into contact with the liquid remaining during idling. When this is repeated, the cutting blade undergoes a thermal cycle with a large temperature difference. As a result, a thermal crack occurs early on the cutting blade, and a defect starting from this thermal crack occurs. This makes the cutting edge extremely short-lived.

In conventional face milling, residual gas remains on the work material by injecting a gas such as compressed air from a nozzle provided outside or a fluid supply hole for cutting blade cooling or chip removal provided inside the tool body of the face mill. There has been an example of blowing off a liquid such as a water-soluble cutting fluid.

FIG. 9 illustrates a conventional face mill with a supply hole provided inside the tool body. This conventional face mill is formed by providing a cutting edge on the outer periphery of the tip of a disk-shaped tool body 1. Further, a fluid supply hole 16 is formed in the tool body 1, and the supply hole 16 is opened to face the rake face 6A immediately before the rake face 6A on the rake face 6A continuous with the cutting edge. The opening is formed in a direction extending toward the cutting edge (see, for example, Patent Document 1).
JP 2000-5923 A

However, when a gas such as compressed air is ejected from a nozzle provided outside, the gas is obstructed by the tool body of the face mill, so that the remaining liquid such as a water-soluble cutting fluid cannot be sufficiently removed. It was.

In the face mill disclosed in Patent Document 1, since the supply hole 16 is directed to the cutting edge, the splash of liquid such as a water-soluble cutting fluid remaining due to the gas such as the injected compressed air is caused by cutting during cutting. There is a high possibility of contact with the blade. Even if the remaining liquid is blown off temporarily, the liquid often returns to the cutting portion due to feed or cutting vibration of a machine tool, and eventually the liquid acts on the cutting edge being cut. Blade life is reduced.

The present invention has been made in view of the above circumstances, and its purpose is to prevent a reduction in the life of the cutting edge when face milling a work material in which a liquid such as a water-soluble cutting oil remains. To provide milling.

In order to solve the above problems, a face mill according to the present invention is a face mill in which a plurality of cutting blades are arranged at substantially equal intervals along the circumferential direction on the outer periphery of the tip of a tool body that rotates around an axis. In the tool body, at least one first supply hole for introducing gas supplied from the outside is formed, and the first supply hole has an opening extending toward the outer peripheral side of the tool, Further, at least one arbitrary cutting edge in the opening is directed forward in the direction of tool rotation, and the gas remaining in the portion to be cut by the gas flowing through the first supply hole and injected from the opening. The face milling machine is characterized in that the liquid to be removed is removed.

In the above face mill, when viewed from the tool rotation direction, the opening of the first supply hole has an inclination angle in a range of 3 ° to 45 ° on the tool tip side with respect to a straight line perpendicular to the axis of the tool body. Preferably, the first supply holes are provided in the same number as the cutting blades so as to be paired with the cutting blades, and correspond to the opening portions of the respective first supply holes. It is preferable that the cutting edge is directed forward in the tool rotation direction.

Furthermore, in the above face mill, at least one second supply hole for introducing a gas supplied from the outside is formed inside the tool body, and the second supply hole faces the tool tip side. An opening that extends and is directed toward the inner periphery of the tool relative to the cutting edge in the opening, and further remains on the tool tip side by the gas that flows through the second supply hole and is injected from the opening. It is preferred that the liquid to be removed is removed. Furthermore, it is preferable that the openings of the second supply holes are arranged at a plurality of positions at different distances from the axis of the tool body.

The processing method of the present invention is the above-described processing method using a face mill, wherein the gas flowing through the first supply hole of the face mill is injected from the opening of the first supply hole, whereby the cutting blade is cut. It is a processing method characterized by cutting while removing the liquid remaining in the part to be attempted.

In the above processing method, it is preferable that the gas flowing through the second supply hole of the front milling cutter is ejected from the opening of the second supply hole, thereby cutting while removing the liquid remaining on the tool tip side. .

According to the face milling and processing method of the present invention, the gas is injected from the opening of the first supply hole extending toward the outer peripheral side of the tool, so that the cutting edge of the face mill remains on the portion to be cut. In order to remove the liquid and prevent the liquid from coming into contact with the cutting blade, the thermal cycle generated in the cutting blade is reduced and the life of the cutting blade is greatly extended.

Since the opening of the first supply hole is directed forward in the tool rotation direction of the cutting blade as seen from the axial direction of the tool body, the liquid splash by the injected gas does not affect the cutting blade during cutting. The effect of extending the cutting edge life is further increased.

When viewed from the direction of tool rotation, the opening of the first supply hole is inclined toward the tool tip side with respect to a straight line perpendicular to the axis of the tool body. There is a possibility that the effect of removing the remaining liquid may not be sufficiently obtained, and when it exceeds 45 °, the effect of blowing the remaining liquid to the tool outer peripheral side becomes low and the splashing of the liquid may be applied to the cutting blade.

Further, when the same number of the first supply holes as the cutting blades are provided and are paired with the cutting blades, the effect of removing the liquid remaining in the respective cutting blades becomes uniform and high.

When the front milling machine is used with the tool axis in a horizontal position, such as a horizontal machining center, for example, after the liquid remaining in the part to be cut is removed, it is applied to the part to be cut by cutting vibration. Although there is a risk of returning, the gas that is jetted from the opening of the second supply hole that extends toward the tool tip side removes the liquid that returns to the part to be cut, so that the cutting edge life is reduced. The extension effect becomes even higher.

If a plurality of openings extending toward the tool tip end are provided at different distances from the axis of the tool body, the effect of removing the liquid that returns to the portion to be cut becomes extremely high.

In this invention, the gas which distribute | circulates a 1st and 2nd supply hole and is injected from each opening part is well-known gas, such as compressed air, nitrogen gas, and argon gas. It is preferable to use compressed air in terms of supply equipment and cost. The liquid is a liquid such as a water-soluble or water-insoluble cutting fluid mainly used for cutting and a cleaning agent used for cleaning a work material.

Next, a first embodiment to which the present invention is applied will be described with reference to the drawings. FIG. 1 is a front view of a main part of a face mill according to the first embodiment. FIG. 2 is a front side view of the main part of the front milling machine shown in FIG. FIG. 3 is an end view taken along the line S1-S1 of the face mill shown in FIG. FIG. 4 is a schematic view of the machining state of the face mill shown in FIG. As illustrated in FIGS. 1 and 2, in the front milling cutter 1, the tool body 2 has a substantially disk shape centered on the axis CL, and is attached to a spindle end (not shown) of the machine tool via an arbor. That is, a milling hole 3 extends through the center of the tool body 2 along the axis CL, and the diameter of the tool body 2 from the opening of the milling hole 3 to the axis CL is formed on the rear end surface 2b. A key groove 4 extending in the direction is formed, and the tool body 2 has a shaft portion (not shown) of the arbor inserted into the milling hole 3, and the key groove 4 is provided on the end surface side of the flange portion of the arbor. (Not shown) is fitted to the arbor by a mounting bolt (not shown) inserted into the milling hole 3, and is rotated in the tool rotation direction K around the axis CL for use in cutting. .

Although not shown in FIG. 1 and FIG. 2 as a whole, chips that form a concave curved surface toward the axial center CL side of the tool body 2 at the outer peripheral surface of the tool body 2 so as to cut out the outer peripheral surface 2c. The pockets 5 are formed at eight positions in the circumferential direction, and recessed portions 7 are formed on the chip pockets 5 at the rear side in the tool rotation direction K so as to be further recessed than the respective chip pockets 5. The concave portion 7 is formed with a wedge insertion groove 7b and a tip attachment groove 7a in order toward the front side in the tool rotation direction K. The wedge insertion groove 7b and the tip attachment groove 7a are respectively provided with a wedge member 30 and a roughing tip. 10 is inserted and the clamping screw 31 inserted into the wedge member 30 is screwed into a female screw hole provided on the bottom surface of the wedge insertion groove 7b facing the outer peripheral side of the tool, whereby the roughing chip 10 is inserted into the chip mounting groove 7a. Is pressed against the surface and the wall surface of the tool rotational direction K front is fixed to the tool body 2.

In the two chip pockets 6 that are substantially rotationally symmetric with respect to the axis CL of the tool body 2, another recess 8 having a different form from the above-described recess 7 is formed. That is, in the concave portion 8, a tip mounting groove 8a and a wedge insertion groove 8b are formed in order toward the front side in the tool rotation direction K, and an adjustment wedge insertion groove 8c is formed on the tool rear end side of the tip mounting groove 8a. The finishing tip 20, the wedge member 40, and the adjustment wedge member 50, which are provided for finishing, are inserted into the tip mounting groove 8a, the wedge insertion groove 8b, and the adjustment wedge insertion groove 8c, respectively, and are inserted into the wedge member 40. By screwing the clamp screw 41 into the female screw hole provided on the bottom surface of the wedge insertion groove 8b facing the outer peripheral side of the tool, the finishing chip 20 is pressed against the bottom surface of the chip mounting groove 8a and the wall surface on the rear side in the tool rotation direction K. The tool body 2 is fixed. The fastening tip 51 inserted into the adjustment wedge member 50 is screwed into a female screw hole provided on the bottom surface of the adjustment wedge insertion groove 8c facing the outer peripheral side of the tool, so that the finishing tip 20 is along the tip attachment groove 8a. The cutting edge position is finely adjusted.

In the present embodiment, as described above, the tool body 2 is provided with two finishing tips 20 for finishing and eight other roughing tips 10 for roughing. As shown by a two-dot chain line in FIG. 3 (the position in the diametrical direction is shifted so as not to overlap the roughing chip), the finishing chip 20 is formed of a deformed pentagonal flat plate base 22. A notch step portion 22a is provided on one ridge line portion of the upper surface, and a cutting blade member 23 forming a substantially rectangular parallelepiped is fixed to the notch step portion 22a by brazing, for example. The chip base material 22 is made of a hard material such as cemented carbide, and the cutting blade member 23 is made of a cubic boron nitride sintered body.

The finishing tip 20 has a cutting edge 21 at a crossing ridge line portion between the upper surface of the cutting edge member 23 and the tip base material 22 that become the rake face 20a and the side surface on the long side of the cutting edge member 23 that becomes the flank 20b. When the rake face 20a is formed and attached to the tool body 2 with the rake face 20a facing the tool rotation direction K, the cutting blade 21 protrudes most toward the tool tip side and forms a linear shape or an arc shape with a large curvature radius. And a corner cutting edge 21b continuous with the tool outer peripheral side end of the wiper 21a, and a relief portion 21c continuous with the tool inner peripheral end. Further, the finishing chip 20 is not fixed in thickness, and the lower surface 20c is slightly inclined with respect to the rake face 20a, and is attached to the tool body 2 so that the thickness decreases toward the outer peripheral side of the tool. The tool main body 2 is prevented from moving to the tool outer peripheral side by the centrifugal force generated when the tool body 2 rotates.

Further, in the present embodiment, as shown by a two-dot chain line in FIG. 3, the roughing chip 10 is a positive chip having a substantially square flat plate shape, and is made of ceramics. The cutting edge 11 is comprised from the main cutting edge 11a formed in the crossing ridgeline part with the side surface made into 10b, and the circular-arc-shaped corner cutting edge 11b formed in the corner part of the said rake face 10a. The roughing chip 10 is inserted into the chip mounting groove 7a with the rake face 10a facing the tool rotation direction K, and the rotation locus of the main cutting edge 11a located on the outer peripheral side of the tool goes to the tool rear end side. Therefore, it is attached to the tool body 2 with a slight inclination so as to go to the tool outer peripheral side. Here, in the relationship with the wiper 21a of the finishing tip 20 described above, the roughing tip 10 has a main cutting edge 11a protruding toward the tool outer peripheral side with respect to the wiper 21a, and a corner cutting edge 11b has the wiper 21a. Retracted to the rear end side of the tool.

As shown in FIGS. 1 to 3, the roughing tip is disposed inside the tool body 2 so as to communicate with a supply hole (not shown) provided on the arbor side when attached to the arbor as described above. 10 and the same number of first supply holes 60 as the total number of finishing chips 20 are formed. In the present embodiment, each first supply hole 60 extends linearly from the introduction portion 61 opened on the inner wall surface of the milling hole 3 of the tool body 2 radially toward the tool outer peripheral side, and each chip pocket 5 , 6 is formed with an opening 62 that opens in a concave curved surface.

Each of the first supply holes 60 is formed in a circular cross section, and the axis CL1 of the opening 62 is, when viewed from the tool rotation direction K, the feed direction of the front milling machine 1 (direction of arrow F). That is, the tool body 2 is inclined toward the tool tip side with respect to a straight line orthogonal to the axis CL of the tool body 2, and the inclination angle α is set to an angle in the range of 3 ° to 45 °. Further, the opening 62 is directed forward in the tool rotation direction K with respect to the rake faces 10 a and 20 a of the roughing chip 10 and the finishing chip 20 when viewed from the axial center CL direction of the tool body 2. Preferably, the axis CL1 of the opening 62 is inclined toward the front side of the tool rotation direction K with respect to the rake faces 10a and 20a, and the inclination angle β is an angle in the range of 0 ° to 90 °. Set to

The face mill 1 having the above-described configuration is for machining the engine block 100 made of cast iron, and is rotated in the tool rotation direction K around the axis CL together with the main axis of the machine tool. The main cutting edge 11a and the corner cutting edge 11b of the roughing chip 10 roughly cut a portion having a predetermined cutting depth from the surface 101 of the engine block 100 by being fed in a direction orthogonal to each other (direction of arrow F). Then, the wiper 21a of the finishing tip 20 finishes and cuts a portion having a predetermined cutting depth from the processing surface cut by the roughing chip 10 to form a smooth processed surface 103.

As schematically shown in FIG. 4, in the face milling of the engine block 100, the water-soluble cutting fluid (liquid) used in drilling, reamer processing, tapping, boring, etc. is applied to the surface 101 of the engine block 100. In addition, the front milling blade that is intermittently cut in a state where it remains in the concave portion 102 such as a through hole or a blind hole is subjected to a thermal cycle with a large temperature difference, and a thermal crack is generated early. It becomes extremely short life due to the deficiency. In particular, since the front milling machine 1 performs finishing at a relatively high cutting speed, the thermal shock to the cutting edges 11 and 21 becomes very large, and the cutting edges 11 of the roughing chip 10 and the finishing chip 20 Since the ceramics and cubic boron nitride sintered body constituting 21 have lower toughness than cemented carbide, the cutting edges 11 and 21 are more easily lost.

According to this front milling cutter 1 and a processing method using the same, compressed air (gas) introduced into the first supply hole 60 from a supply hole (not shown) provided on the arbor side is supplied to the first supply hole 60. Water-soluble cutting injected from the opening 62 toward the tool tip side with respect to the tool outer peripheral side and the feed direction of the main milling cutter 1 (direction of arrow F) and remaining on the surface 101 and the recess 102 of the engine block 100. Remove by blowing off the oil. Moreover, since the compressed air is sprayed toward the work portion in front of the tool rotation direction K with respect to the rake surfaces 10a and 20a of the respective cutting blades 11 and 21, the water-soluble cutting oil remaining in the portion to be cut is removed. It can be effectively removed. Therefore, since the thermal cycle generated in the cutting blades 11 and 21 is reduced, the life of the cutting blades 11 and 21 is greatly extended.

In addition, since the compressed air is jetted forward in the tool rotation direction K, not toward the respective cutting blades 11 and 21 and the rake surfaces 10a and 20a, the splashed water-soluble cutting fluid contacts the cutting blades 11 and 21. There is nothing. Therefore, the effect of extending the cutting edge life is further enhanced. The same number of first supply holes 60 as the total number of the roughing chips 10 and the finishing chips 20 are provided, and the respective first supply holes 60 are provided so as to make a pair with the cutting edges 11 and 21 of these chips 10 and 20. If this is done, the effect of removing the remaining water-soluble cutting fluid becomes extremely high. However, in terms of the above effect, at least one first supply hole 60 is provided, and each first supply hole 60 is an arbitrary one. It may be provided to make a pair with the two cutting blades 11, 21.

When the inclination angle α between the opening 62 of the first supply hole 60 and the straight line perpendicular to the axis CL of the tool body 2 is less than 3 ° when viewed from the tool rotation direction K, the water-soluble cutting oil remaining in the recess 102 is removed. The removal effect may not be sufficiently obtained, and if it exceeds 45 °, the effect of blowing off the remaining water-soluble cutting fluid to the outer peripheral side of the tool becomes low and the water-soluble cutting fluid may jump up to the cutting edges 11 and 21. is there.

When viewed from the axial center CL direction of the tool body 2, the inclination angle β between the opening 62 of the first supply hole 60 and the rake faces 10a, 20a of the roughing chip 10 and the finishing chip 20 is less than 0 °, that is, When the opening 62 is directed to the rake face 10a, 20a side, there is a risk that the water-soluble cutting oil blown off by compressed air may come into contact with the cutting edges 11, 21, and when the inclination angle β exceeds 90 °, There is a possibility that the water-soluble cutting fluid blown off may come into contact with the other cutting blades 11 and 21 located on the front side in the tool rotation direction K.

Next, a second embodiment to which the present invention is applied will be described with reference to the drawings. FIG. 5 is a front view of a main part of a face mill according to the second embodiment. FIG. 6 is a side view of the main part of the front milling machine shown in FIG. FIG. 7 is an end view taken along the line S2-S2 of the face mill shown in FIG. FIG. 8 is a schematic view of the machining state of the face mill shown in FIG. This front milling machine is obtained by adding a second supply hole to be described later to the front milling machine according to the first embodiment described above. That is, as shown in FIGS. 5 to 7, when the tool body 2 is attached to the arbor in the same manner as the first supply hole 60 described above, a supply hole (not shown) provided on the arbor side is provided. A plurality of second supply holes 70 that communicate with each other are formed. In the present embodiment, each of the second supply holes 70 extends linearly from the introduction portion 71 communicating with the first supply hole 60 toward the tool tip side, and opens to the tip surface 2 a of the tool body 2. 72 is formed. The number of second supply holes 70 is the same as that of the first supply holes 60.

Each of the second supply holes 70 is formed in a circular cross section, and the axial center CL2 of each opening 72 extends substantially parallel to the axial center CL of the tool body 2 when viewed from the tool rotation direction K. Furthermore, it is provided at a plurality of positions at different distances from the axis CL. Further, when viewed from the axial center CL direction, each opening 72 is arranged such that the distance from the axial center CL increases as it goes forward in the tool rotation direction K.

For example, when the face mill 1 according to the first embodiment is horizontally mounted on the main shaft of a horizontal machining center or the like, the compressed air injected from the opening 62 of the first supply hole 60 as described above. Although the water-soluble cutting fluid remaining in the portion to be cut is once removed by the step, the water-soluble cutting fluid remaining in the recess 102 of the engine block 100 returns to the portion to be cut by table feed, cutting vibration, gravity, etc. However, according to the front milling machine 1 to which the second supply hole 70 is added as described above, the portion to be cut by the compressed air injected from the opening 72 of the second supply hole 70. Since the water-soluble cutting fluid that returns to (2) is removed and does not come into contact with the cutting edges 11 and 21, the effect of extending the cutting edge life is further enhanced.

Furthermore, since a plurality of openings 72 of the second supply hole 70 are provided at different positions from the axis CL of the tool body 2, the water-soluble cutting fluid remaining on the tool tip side is removed from the tool inner peripheral side. Since it can be removed evenly on the outer peripheral side, a high cutting edge extension effect can be reliably obtained. The number of the second supply holes 70 is not limited to the same number as the cutting blades 11 and 21, and at least one second supply hole 70 may be provided in terms of achieving the above-described effect, and adversely affects the strength of the tool body 2. More than the cutting edges 11 and 21 may be provided in the range which is not.

An embodiment of the face mill 1 to which the present invention described above is applied will be described below. The used face mill has a tool diameter of 160 mm, and uses eight roughing chips 10 made of ceramics and two finishing chips 20 made of a cubic boron nitride sintered body as described above. A tilt angle α of 30 ° with respect to a straight line perpendicular to the axis CL of the tool body 2 when viewed from the tool rotation direction K, and having the same number of first supply holes 60 as the chips 10 and 20 (hereinafter referred to as the present invention). In addition to the first supply hole 60, the same number as the chips 10 and 20 is provided in parallel to the axis CL of the tool body 2 and at different distances from the axis CL. There are three types: one provided with the second supply holes 70 over the entire side (hereinafter referred to as product B of the present invention) and a conventional product provided with no supply holes (hereinafter referred to as conventional product).

As shown in FIG. 8, these face mills were attached to the main spindle of the horizontal machining, and face milling of the front and rear faces of the engine block 100 was performed. The engine block 100 is made of ordinary cast iron FC250 (JIS G 5501), and the front and rear surfaces 101 to be machined have a depression 102 such as a depression of a casting material and a machining hole, and a drill before the front milling. The surface (101) and the recess (102) are in a state in which the water-soluble cutting fluid remains by wet processing using a reamer, a tap, or the like. Since the front milling is finishing of the front and rear surfaces of the engine block (100), the cutting speed is 500 m / min. The feed per blade was set to 0.15 mm / tooth and the cutting depth was 0.5 mm. The front and back surfaces were continuously processed under the above cutting conditions, and the number of engine blocks processed until the cutting edge of each front milling cutter was damaged was compared.

In the conventional product, the cutting blade that is being cut contacts the remaining water-soluble cutting fluid and undergoes a thermal cycle with a very large temperature difference, so that early cracks starting from thermal cracks occur and only 48 operations can be performed. There wasn't. On the other hand, in the product A of the present invention, the compressed air injected from the opening 62 of the first supply hole 60 removes the water-soluble cutting fluid remaining in the portion to be cut and does not contact the cutting edges 11 and 21. Therefore, as a result of reducing the thermal cycle generated in the cutting blades 11 and 21, 203 pieces, which is about four times the conventional product, could be processed. In the product B of the present invention, the water-soluble cutting oil remaining in the recess 102 provided in the engine block 100 is further removed by the compressed air injected from the opening 72 of the second supply hole 70 so as not to return to the cutting point. As a result, the cutting blades 11 and 21 were not contacted with certainty, so that 498 pieces, which was about 10 times the conventional product and about 2.5 times the product A of the present invention, could be processed.

In the face mill to which the present invention is applied, the positions of the introduction portions 61 and 71 and the openings 62 and 72 of the first and second supply holes 60 and 70, the cross-sectional shape and the shape viewed from the tool rotation direction K, and the chip configuration (roughness). The shape, material, and the form, material, etc. of the work material are not limited to the above-described embodiment, but are changed, deleted and deleted within the scope not departing from the gist of the present invention. It goes without saying that additions are possible.

It is a front view of the principal part of the front milling machine concerning a 1st embodiment to which the present invention is applied. It is a front view side view of the principal part of the front milling machine shown in FIG. It is a S1-S1 line | wire cut part end elevation of the face mill shown in FIG. It is a schematic diagram of the processing state of the face mill shown in FIG. It is a front view of the principal part of the front milling machine concerning a 2nd embodiment to which the present invention is applied. FIG. 6 is a side view of the main part of the front milling machine shown in FIG. It is a S2-S2 line cutting part end view of the front milling machine shown in FIG. It is a schematic diagram of the processing state of the face mill shown in FIG. It is a front view side view of the principal part of the conventional front milling machine.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Front mill 2 Tool body 5, 6 Chip pocket 7, 8 Recess 7a, 8a Tip attachment groove 7b, 8b Wedge insertion groove 8c Adjustment wedge insertion groove 10 Roughing tip 20 Finishing tip 30, 40 Wedge member 50 Adjustment wedge member 60 First supply hole 70 Second supply hole 61, 71 Introducing portion 62, 72 Opening portion 100 Engine block 102 Recessed portion

Claims (7)

In the front milling machine in which a plurality of cutting blades (11, 21) are arranged at substantially equal intervals along the circumferential direction on the outer peripheral portion of the tip of the tool body (2) rotating around the axis (CL),
At least one first supply hole (60) for introducing a gas supplied from the outside is formed inside the tool body (2), and the first supply hole (60) is directed toward the outer peripheral side of the tool. The opening (62) extending in the direction of the tool rotation direction (K) in front of at least one arbitrary cutting edge (11, 21) in the opening (62), and A front milling machine characterized in that a liquid remaining in a portion to be cut is removed by a gas flowing through a supply hole (60) and jetted from the opening (62). When viewed from the tool rotation direction (K), the opening (62) of the first supply hole (60) is 3 ° to the tool tip side with respect to a straight line perpendicular to the axis (CL) of the tool body (2). 2. The face mill according to claim 1, wherein the face mill is formed so as to extend in a direction inclined with an inclination angle ([alpha]) in a range of 45 [deg.]. The first supply holes (60) are provided in the same number as the cutting blades (11, 21) and in pairs with the cutting blades (11, 21), and the openings of the first supply holes (60). The front milling machine according to claim 1 or 2, characterized in that the cutting blade (11, 21) corresponding to (62) is directed in front of the tool rotation direction (K). At least one second supply hole (70) for introducing a gas supplied from the outside is formed inside the tool body (2), and the second supply hole (70) is directed toward the tool tip side. And the opening (72) is directed to the inner peripheral side of the tool with respect to the cutting edges (11, 21) in the opening (72), and further circulates through the second supply hole (70). The front milling machine according to any one of claims 1 to 3, wherein the liquid remaining on the tip side of the tool is removed by the gas jetted from the opening (72). The front surface according to claim 4, wherein the openings (72) of the second supply hole (70) are arranged at a plurality of positions at different distances from the axis (CL) of the tool body (2). fries. In the processing method using the face mill (1) according to any one of claims 1 to 5,
Cutting gas (11, 21) will cut by the gas flowing through the first supply hole (60) of the face mill (1) being injected from the opening (62) of the first supply hole (60). A processing method characterized by cutting while removing the liquid remaining in the portion. The processing method according to claim 6, wherein
The gas flowing through the second supply hole (70) of the face mill (1) is ejected from the opening (72) of the second supply hole (70), thereby removing the liquid remaining on the tool tip side. The processing method characterized by cutting while.

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