JP2001191208A - Indexable face milling - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tool body 1 which is pressed by a clamp member.
In a face mill capable of adjusting the contact of the front cutting edge 12 by pressing the tip 5 attached to the tool to the tool tip side by an adjusting mechanism, the tip 5 stably protrudes toward the tool tip side and has a high height. Adjust the accuracy of the front deflection. SOLUTION: A chip 5 having a front cutting edge 12 is detachably attached to a concave portion 3 formed in a tool main body 1 rotated about an axis O by a wedge 6, and the front cutting edge 12 is attached to the tool main body 1. An adjustment mechanism for adjusting the run-out of the tip 5 is provided, and can be engaged with the seating surface 5B of the chip 5 and the mounting seating surface 4A of the concave portion 3 in a direction intersecting the pressing direction by the wedge 6 and the pressing direction by the adjusting mechanism. Engaging parts 15, 9
Are formed so as to extend in the direction of the axis O.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tool body in which a throw-away tip (hereinafter referred to as a tip) having a front cutting edge is detachably attached to a tool body, and the tip end of the front cutting edge of the tip. The present invention relates to a throw-away type face mill (hereinafter, referred to as a face mill) provided with an adjustment mechanism for adjusting the run-out of the workpiece.

[0002]

2. Description of the Related Art In a face milling machine of this type, for example, a concave portion is formed on the outer periphery of a tip portion of a disk-shaped tool body, and a chip having a front cutting edge formed on one wall surface facing the circumferential direction of the concave portion. A chip member such as a cartridge having the tip mounted on the tip is seated directly or via a flat plate, and the space between the other wall surface of the concave portion and the side surface of the chip member facing the wall surface. There is known a device in which a clamp member such as a wedge is inserted into a hole to press and attach the chip member to the one wall surface. In such a front milling machine, there are various types of the front milling machine provided with an adjusting mechanism for finely adjusting the amount of protrusion of the tip member attached to the tool tip side of the front cutting blade, that is, the front runout of the cutting blade. Proposed.

That is, as such an adjusting mechanism, one of the recesses is formed at the tool rear end side of the recess of the tool body and communicates with the recess, and the tip is inserted into the other recess. Insert another wedge that can be in contact with the rear end surface of the member and the wall surface of the other concave portion facing the tool tip side by screwing in with the mounting screw, etc., and insert the tip member with the other wedge according to the amount of screwing. There has been proposed an apparatus in which the deflection of the front cutting edge can be adjusted by pressing the tip of the cutting blade toward the front end so as to protrude. Also, as another one, another recess is similarly formed on the tool rear end side of the recess, and the tip is on the rear end face of the tip member on the wall surface facing the tool tip side of the other recess. An adjustable screw that can be contacted is screwed in along the axial direction of the tool body, and by rotating the adjusting screw to project toward the tool tip, the tip member is also pressed toward the tool tip and pushed out. Some of them have been proposed.

[0004]

In the case where such a face mill is used to perform a more precise finish surface machining, more strict control of the run-out of the front cutting edge is required. However, in the clamping of the tip member by the above-described clamp member such as a wedge, the seating surface of the tip member facing one wall surface side of the concave portion is
This does not mean that the entire surface is pressed against the one wall surface or the mounting seat surface of the plate that is in close contact with the seating surface with a uniform pressing force, but a slight bias is generated in the pressing force due to a molding error of the tool body or each member. That is inevitable. On the other hand, also with respect to the pressing force of the adjusting mechanism to the tip end of the tool of the tip member, it is unavoidable that a slight deviation similarly occurs. In such a case, the tip member cannot be stably protruded to the tool tip side, and in some cases, the tip member may be inclined.

The present invention has been made under such a background, and a tip member, which is pressed by a clamp member and attached to a tool body, is pressed toward a tool tip side by an adjustment mechanism, so that a front cutting is performed. An object of the present invention is to provide a face mill capable of adjusting the contact of the blade with the tip member stably to the tip end side of the tool and performing highly accurate front deflection.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems and to achieve such an object, the present invention provides a substantially disk-shaped tool body which is formed around the distal end of a tool body rotated about an axis. In the recess, a tip member having a cutting front blade protruding toward the tool tip side is detachably attached by pressing a seating surface of the tip member against a mounting seat surface provided in the recess by a clamp member, and is attached to the tool body. In a face milling machine provided with an adjusting mechanism for adjusting the deflection of the front cutting edge toward the tip side by pressing the tip member toward the tool tip side, a seating surface of the tip member and a mounting seat surface on the recess side are provided. And an engagement portion that is engageable in a direction intersecting a pressing direction by the clamp member and a pressing direction by the adjustment mechanism, and is formed so as to extend in the axial direction. That. Therefore, since such an engaging portion is formed on the seating surface of the tip member and the mounting seat surface on the concave side, the tip member is restrained from moving in the pressing direction by the clamp member, and Since the movement in the direction in which the joining portion can be engaged is restricted, and only the protrusion by the adjusting mechanism in the axial direction in which the engaging portion extends is permitted, the tip member is It is possible to accurately adjust the run-out of the front cutting blade without tilting.

Here, various shapes can be adopted as the cross-sectional shape of the engaging portion formed on the seating surface and the mounting seating surface, respectively. Is formed so as to form a continuous serration, so that the engaging portions can be surely engaged, although the formation of the engaging portions is relatively easy.
Further, when the tip member is formed in a substantially flat plate shape, in order to give a positive or negative axial rake angle to the front cutting edge, the mounting seat surface on the concave side and the seating surface of the tip member are aligned with the axis of the tool body. When the tip member is tilted, the pressing direction of the clamp member is also inclined in accordance with this, and when the tip member is pressed against the mounting seat surface side, the deflection of the front cutting edge may be slightly shifted, so such In order to reliably prevent even a very small deviation of the front deflection, the pressing direction of the clamp member is set to a direction along a plane perpendicular to the axis, and the seating surface and the mounting seat surface are aligned with the axis. It is desirable to be formed so as to extend in a direction parallel to.

Further, with respect to the mounting seat surface on the concave side where the engaging portion is formed, when the seating surface of the chip member is in direct contact with the one wall surface of the concave portion, the wall surface is attached to the mounting seat surface. However, if the plate is removably attached to the concave portion as described above and the mounting seat surface on the concave side is formed on the plate, the formation of the engaging portion of the mounting seat surface is further facilitated. At the same time, even if the engagement portion is damaged or the like, recovery can be achieved by replacing the plate. On the other hand, with respect to the seating surface on the chip member side, the chip member may be formed as a chip having the front cutting edge formed at the tip, and the seating surface of the chip member may be formed directly on the chip. In this case, the engaging portion on the tip member side is also formed directly on the tip on which the front cutting edge is formed, so that the runout can be adjusted with higher precision. Further, the tip member may be configured such that the tip on which the front cutting edge is formed is detachably attached to the tip of the cartridge, and a seating surface of the tip member may be formed on the cartridge. By appropriately replacing the cartridge, it becomes possible to attach chips of various shapes to the tool body.

[0009]

1 to 6 show a first embodiment of the present invention.
1 shows an embodiment of the present invention. In the present embodiment, the tool main body 1 has a center portion around an axis O on which a mounting portion 2 for mounting the tool main body 1 to a machine tool is formed at a rear end portion. The workpiece is fed in a direction perpendicular to the axis O while being rotated around the axis O in the tool rotation direction indicated by the symbol T in the drawing, and is subjected to cutting. A cross section orthogonal to the axis O is formed on the outer periphery of the tip of the tool main body 1 on the outer periphery side.
A plurality of concave portions 3 each having an opening in the shape of a letter are formed at equal intervals in the circumferential direction (four at intervals of 90 ° in the present embodiment). Plate 4, a chip 5 also as a substantially flat chip member, and a wedge 6 as a clamp member, and a wedge 7 as a runout adjusting mechanism is mounted on the tool rear end side of the chip 5. ing.

The recess 3 has an inclined flat surface that faces the tool rotation direction T as the wall surface 3A facing the tool rotation direction T of the pair of circumferential wall surfaces 3A and 3B faces the tool tip side. The wall surface 3C facing the tool tip side and the wall surface 3D facing the tool outer peripheral side are formed in a direction orthogonal to the wall surface 3A.
These wall surfaces 3A, 3A are arranged in such a manner that one side surface of the mounting seat surface 4A on the concave portion 3 side faces the tool rotation direction T side.
C, 3D are attached to the recess 3 by being attached to the recess 3 by being screwed into the wall 3D, and being attached to the recess 3 by being fitted into the recess 3 and being inserted from the outer peripheral side of the tool.
Therefore, the mounting seat surface 4A of the plate 4 is also inclined toward the tool rotation direction T toward the tool tip side.

The one side surface of the plate 4 which is the mounting seat surface 4A on the side of the concave portion 3 facing the tool rotation direction T is provided with a tool at its tool tip side in a cross section orthogonal to the axis O. When the engaging portion 9 which is concave and convex in the rotation direction T and the rear side thereof is inclined according to the inclination of the mounting seat surface 4A, and when viewed from the direction facing the mounting seat surface 4A from the tool rotation direction T side. Are formed so as to extend in parallel with the axis O and have the same cross section in the direction of the axis O. Here, in the present embodiment, the engaging portion 9 is attached to the mounting seat surface 4A.
In the cross section perpendicular to the inclination direction, a plurality of equilateral triangles having the same shape and the same size are arranged at regular intervals from the tool inner peripheral side to the outer peripheral side along the mounting seat surface 4A with the bases continuing in a straight line,
In addition, the top of each equilateral triangle is cut flat, and a serrated shape having a substantially saw blade shape is formed in which a relief is formed at the bottom of a valley between adjacent equilateral triangles.

As shown in FIG. 6, the chip 5 as a chip member in the present embodiment has a substantially flat chip body 10 made of a hard material such as a cemented carbide and the like. Approximately half of one side surface is a rake face 5A of the tip 5, and a cutting edge tip 11 made of an ultra-hard sintered body mainly composed of diamond or CBN is provided at one corner of the rake face 5A. The above rake face 5A
The front cutting edge 12 is formed on one edge of the rake face 5A on the cutting edge tip 11 on the corner portion side. In addition, on the edge 11 of the rake face 5 </ b> A, the outer peripheral edge is cut in a direction perpendicular to the front edge 12 through a convex arc-shaped corner edge 13. A blade 14 is formed, and a portion of the chip 5 opposite to the outer peripheral cutting edge 14 across the front cutting edge 12 is retracted with respect to the front cutting edge 12.

The side surface of the chip 5 opposite to the one side surface is a seating surface 5B on the chip member side in the present embodiment, and the seating surface 5B covers the entire surface thereof. An engaging portion 15 on the seating surface 5B side is formed. The shape of the engaging portion 15 in a section parallel to the front cutting edge 12 and orthogonal to the rake face 5A is the same as that of the engaging portion 9.
Of the mounting seat surface 4A is the same shape and size except that the cross section orthogonal to the inclination direction of the mounting seat surface 4A is opposite, that is, a plurality of equilateral triangles of the same shape and size as the engaging portion 9 Continuously on a straight line, they were arranged at equal intervals in a direction parallel to the front cutting edge 12, and the top of each equilateral triangle was cut flat, and a relief was formed at the bottom of the valley between adjacent equilateral triangles. The outer peripheral cutting edge 1 has a substantially saw blade serration shape, and the serration has the same cross-sectional shape.
The seating surface 5B is formed so as to extend in parallel to the seating surface 4B.

The tip 5 constructed as described above is located between the rake face 5A and the seating face 5B and has the outer peripheral cutting edge 1A.
The side surface 5C located on the side opposite to the side 4 is brought into close contact with the wall surface 3D toward the tool inner peripheral side, and is spaced from the wall surface 3C so that the seating surface 5B is attached to the mounting seat surface 4 of the plate 4.
A, and is housed in the concave portion 3 so as to face the engaging portions 9 and 15.
And the seating surface 5B is brought into close contact with the mounting seating surface 4A so that the mounting surface 5B can be engaged in the inner and outer circumferential direction of the tool and can be slid in the direction of the axis O along the inclination of the mounting seating surface 4A. Is done. Here, the side face 5C is perpendicular to the rake face 5A and is parallel to the outer peripheral cutting edge 14. Therefore, when the chip 5 is thus mounted in the recess 3, the tool rotation is performed as shown in FIG. When viewed from the direction T side in a direction facing the rake face 5A, the outer peripheral cutting edge 1
Reference numeral 4 is located on the outer peripheral side of the tool and is arranged in parallel to the axis O. The front cutting edge 12 projects to the tool tip side and is located on a plane orthogonal to the axis O. further,
In this mounting state, the rake face 5A of the chip 5 is
It is made parallel to the wall surface 5A of the recess 3 and is therefore inclined toward the tool rotation direction T toward the tool tip side. Corners will be given.

Further, the side face 5D of the tip 5 facing the tool rear end side in the state of being mounted in the recess 3 in this manner,
The inclined surface is gradually inclined toward the front cutting edge 12 from the side surface 5C toward the outer peripheral cutting edge 14, that is, the concave portion 3.
In the state of attachment to the tool, the inclined surface is directed toward the tip end of the tool toward the outer peripheral side of the tool. Furthermore, rake face 5
The rake face 5 of the one side face of the chip 5 on which A is formed
On the side opposite to A, the side surface 5 is parallel to the front cutting edge 12.
An inclined plane 5E is formed gently toward the seating surface 5B side from the C side toward the outer peripheral cutting edge 14 side, that is, the inclined plane 5E is located on the inner peripheral side of the tool as shown in FIG. As it moves, it is inclined in the tool rotation direction T side.

On the other hand, the pair of wall surfaces 3A, 3B of the recess 3
Of the other wall surface 3B facing the rear side in the tool rotation direction T
The inclined plane 5 of the chip 5 in the mounted state.
A clamp surface 3E parallel to the one wall surface 3A is formed at a position opposing the first wall surface E. Therefore, the width between the clamp surface 3E and the inclined plane 5E gradually increases toward the tool inner peripheral side. A narrow first gap is formed, and the wedge 6 as a clamp member is inserted into the first gap. The portion of the wall surface 3B closer to the tool tip than the clamp surface 3E is formed into a concave curved surface concaved in the tool rotation direction T side. The concave curved surface and the wall surface 3D of the concave portion 3 make the chip 5 scoop. A gap larger than the first gap is defined on the side of the surface 5A in the tool rotation direction T, and is used as a tip pocket.

The wedge 6 has a block shape having a pair of side surfaces 6A and 6B which can be brought into close contact with the inclined plane 5E of the chip 5 and the clamp surface 3E of the concave portion 3 in the above-mentioned mounted state. A clamp screw hole 6C is provided between the side surfaces 6A and 6B so as to be perpendicular to the wall surface 3D of the recess 3 when the wedge 6 is inserted into the first gap. On the other hand, a clamp screw is formed on the wall surface 3D portion behind the first gap so as to be coaxial with the clamp screw hole 6C and twisted in the opposite direction to the clamp screw hole 6C. Hole 3F
Are formed. And these clamp screw holes 3
F, 6C is screwed with a clamp screw 16 having male screw portions 16A, 16B formed at both ends thereof to be screwed into the clamp screw holes 3F, 6C, respectively. Is pushed into the tool inner peripheral side, the tip 5 is pressed perpendicularly to the wall surface 3A to the rear side in the tool rotation direction T via the inclined plane 5E, and is fixed in the recess 3.

On the other hand, between the side surface 5D of the chip 5 fixed in this way and the wall surface 3C of the recess 3 facing the tool tip side, as in the case of the first gap portion, it goes toward the tool inner peripheral side. A second gap where the distance between the side surface 5D and the wall surface 3C is gradually reduced is defined, and the wedge 7 as an adjustment mechanism is inserted into the second gap. This wedge 7 is also similar to the wedge 6 in the side surface 5D.
And a pair of inclined side surfaces 7A, 7 that can be in close contact with the wall 3C.
B, and these side surfaces 7
An adjustment screw hole 7C is provided between A and 7B so as to be perpendicular to the wall surface 3D deep inside the second gap when the wedge 7 is inserted into the second gap. I have. Note that the other pair of side surfaces 7D and 7E of the wedge 7 located on the opposite side with the adjustment screw hole 7C therebetween are formed so as to be parallel to each other and orthogonal to the side surfaces 7A and 7B.

Further, the wall surface 3 at the back of the second gap is provided.
An adjustment screw hole 3G that is twisted in a direction opposite to the adjustment screw hole 7C is formed in the D portion so as to be coaxial with the adjustment screw hole 7C. The adjustment screw holes 3G and 7C have the adjustment screw holes 3G and 7C, respectively. Male thread 17 screwed into holes 3G, 7C respectively
Adjustment screws 17 having A and 17B formed at both ends are screwed. Further, a portion of the mounting seat surface 4A of the plate 4 on the tool rear end side with respect to the engaging portion 9 and the wall surfaces 3B,
At the corner where 3C intersects, flat surfaces 4B and 3H facing each other in parallel with each other with the second gap therebetween and perpendicular to the wall surface 3D are formed, respectively. The other pair of side surfaces 7D, 7E are slidably contacted with the flat surfaces 4B, 3H and inserted into the second gap.

In the face mill having the above-described configuration, in order to adjust the run-out by adjusting the position of the front cutting edge 12 of the tip 5 attached to each of the recesses 3 in the direction of the axis O, the adjusting screw 17 is used. To rotate the wedge 7 of the adjustment mechanism
Into the back of the second gap, that is, the tool inner peripheral side,
Thereby, the side surface 5D is pressed to push the tip 5 toward the tool tip side, and the front cutting edges 12 of all the tips 5.
.. May be positioned on one plane orthogonal to the axis O.
Here, in the present embodiment, the direction perpendicular to the wall surface 3A of the recess 3 toward the rear side in the tool rotation direction T is the pressing direction of the chip 5 by the wedge 6 as a clamp member,
The direction toward the tool tip parallel to the mutually perpendicular wall surfaces 3A and 3D is determined by a wedge 7 as an adjustment mechanism.
In the pressing direction. Then, engaging portions 15, 9 formed on the seating surface 5B of the chip 5 and the mounting seating surface 4A of the plate 4
Are engageable in directions that intersect with these pressing directions, respectively. In the present embodiment, in particular, they can be engaged in a direction perpendicular to the wall surface 3D of the concave portion 3, that is, in a direction orthogonal to both pressing directions. You.

As described above, in the face milling machine having the above-described configuration, the tip 5 moves in the direction intersecting the direction of the pressing force, that is, in the direction perpendicular to the wall surface 3D of the concave portion 3, with the engagement of the engaging portions 15, 9. And pressed by the wedge 6 as a clamp member, ie, the wall 3
In the direction orthogonal to A, the movement is also restrained by the pressing by the wedge 6, so that as a result it is guided by the engaging portions 15 and 9 so that the engaging portion 1
Only movement in the direction in which 5, 9 extends, that is, only in the pressing direction by the adjustment mechanism is permitted. For this reason, when the tip 5 is pushed toward the tool tip side by the wedge 7 of the adjusting mechanism, even if the pressing force by the wedges 6 and 7 as the clamping member and the adjusting mechanism is slightly biased, the tip 5 is The tip 5 does not move in any direction other than the direction in which the engaging portions 15 and 9 extend, so that the tip 5 is inclined and the front cutting edge 12 is not positioned on the same plane orthogonal to the axis O. This makes it possible to perform high-precision vibration adjustment.

In this embodiment, both the chip 5 and the plate 4 are formed in a substantially flat plate shape, and the seating surface 5B and the mounting seating surface 4A on which the engaging portions 15, 9 are formed are also rake faces. 5A and the direction parallel to the wall surface 3A of the concave portion 3, the pressing direction by the wedge 6 as a clamp member is a direction perpendicular to the wall surface 3A, and the pressing direction by the wedge 7 as an adjustment mechanism is the wedge 6 Is perpendicular to the pressing direction, and is parallel to the wall surfaces 3A and 3D. For example, the seating surface 5B and the mounting seat surface 4A
A may be formed in a direction slightly inclined with respect to the wall surface 3A or the wall surface 3A, and the pressing direction by the clamp member or the adjusting mechanism may be oblique to the wall surface 3A or the wall surface 3D, or may not be strictly orthogonal to each other. The direction may be set to be oblique to some extent. The direction in which the engaging portions 15 and 9 are engaged also
It is not necessary that the direction is at least parallel to these pressing directions, that is, the direction may be oblique to at least one of both pressing directions. Also, the direction in which the engagement portions 15 and 9 extend may not be strictly parallel to the axis O when viewed from the tool rotation direction T side, but may be a direction slightly inclined with respect to the axis O.

Further, in the present embodiment, the seating surface 5B
The engaging portions 15 and 9 formed on the mounting seat surface 4A and the mounting seat surface 4A have a serrated shape with a substantially saw-toothed cross section. It is also possible to make the other engaging portion into a ridge having a rectangular cross section that fits with the other engaging portion. However, in order to reliably engage such an engaging portion, high fitting precision is required for the concave groove and the ridge, and the concave groove and the ridge which are uneven at the same height as the serration are formed. Also, there is a problem that it is difficult to secure a large contact area in the engagement direction. On the other hand, when a serrated cross section such as the engaging portions 15 and 9 of the present embodiment is adopted, the slopes thereof come into close contact with each other without requiring high molding accuracy. A sufficient contact area can be ensured, and a wedge effect is generated between the engaging portions 15 and 9 by being pressed by the wedge 6 as a clamp member, so that a high mounting rigidity can be obtained, and it is possible to surely and easily. The engagement portions 15 and 9 can be engaged. In the present embodiment, the serrated cross section is formed by continuously forming equilateral triangles as described above, but other triangles, trapezoids, or waveforms such as sine and cosine curves face the groove bottom side. The same effect can be obtained by providing a slope having a groove width gradually reduced.

In this embodiment, a plate 4 is interposed between the wall 3A of the recess 3 and the chip 5, and the plate 5
The engaging portion 9 is formed with the side surface facing the tool rotation direction T side as the mounting seat surface 4A, but without such a plate 4 interposed, for example, the wall surface of the recess 3 facing the tool rotation direction T It is also possible to form the engaging portion directly on 3A. However, in such a case, if the engaging portion is worn or broken, the tool body 1 must be replaced, which is uneconomical. In particular, when the dimensions of the tool body 1 are not so large, However, it is difficult to form an engaging portion extending in the direction of the axis O on the wall surface 3A facing the circumferential direction in the concave portion 3 as in the present embodiment. On the other hand, in the present embodiment, the plate 4 is detachably mounted in the recess 3 and the plate 4 is provided with the mounting seat surface 4A to form the engaging portion 9, so that the engaging portion 9 is formed.
Can be easily formed, and even if the engaging portion 9 is worn out, only the plate 4 needs to be replaced, which is economical.

Further, in the present embodiment, as for the engaging portion 15 on the tip member side, the side of the tip 5 having the front cutting edge 12 formed at the tip end facing the mounting seat surface 4A side is the seat of the tip member. The seating surface 5 of the chip 5 is a surface 5B.
Since the engaging portion 15 is formed directly on the chip B, that is, both the engaging portion 15 and the front cutting edge 12 are provided integrally with the chip 5, the deflection of the front cutting edge 12 can be adjusted with higher precision. It can be carried out. In addition, a cutting edge 12 made of an ultra-hard sintered body containing diamond or CBN as a main component is joined to a chip body 10 made of a hard material such as a cemented carbide as in this embodiment. Chip 5 formed with 14
In this case, the rigidity of the tip member itself is high and the rigidity of attachment to the tool body 1 is high, and the deflection of the front cutting edge 12 can be more accurately determined according to the amount of the wedge 7 as the deflection adjusting mechanism pushed into the second gap. It is possible to perform the adjustment, and it is possible to obtain the effect that the runout adjustment accuracy can be maintained even for a hard workpiece.

However, on the other hand, the chip 5 itself is used as a chip member, and
5 is directly formed, the cutting edge 1 of the tip 5
When wear occurs in 2 to 14, the entire chip 5 having the engaging portion 15 must be replaced, and a general chip without the engaging portion 15 cannot be attached. Another problem is that the versatility is impaired. Therefore, in order to solve such a problem, as in the second embodiment of the present invention shown in FIGS. 7 and 8, the chip 22 having the front cutting edge 21 is detachably attached to the cartridge 23. An engaging portion 24 engageable with the engaging portion 9 of the mounting seat surface 4A on the concave portion 3 side on the seating surface 23A of the cartridge 23.
May be formed. Note that the chip 22 and the cartridge 23, which are chip members in the second embodiment,
The configuration other than the above is the same as that of the first embodiment. Therefore, the same reference numerals are assigned to common parts, and description thereof will be omitted.

That is, in the second embodiment, the cartridge 23 has a first shape as shown in FIG.
The tip mounting seat 23B is substantially the same as the tip 5 of the above embodiment, and is recessed one step from the side surface on the tip outer peripheral side of the side surface facing the tool rotation direction T side when the tool body 1 is mounted in the concave portion 3. Is formed, and this chip mounting seat 2 is formed.
The chip 22 having the front cutting edge 21, the corner cutting edge 25, and the outer peripheral cutting edge 26 formed on one corner of the rake face 22A is seated on the cutting surface 3B, and is detachably attached by a clamp screw 27. These chips 2
The chip member according to the second embodiment is constituted by the cartridge 2 and the cartridge 23. In this chip 22, similarly to the chip 5 of the first embodiment, the one corner of the side face to be the rake face 22A of the substantially rectangular flat chip body 28 made of a hard material such as cemented carbide is used. A cutting edge chip 29 made of an ultra-hard sintered body containing diamond or CBN as a main component is bonded to the rake face 22A at the portion, and the edge of the rake face 22A on the cutting edge chip 29 is Cutting blades 21, 25, 26 are formed.

On the other hand, the side surface facing the tool rotation direction T on the opposite side to the side surface of the cartridge 23 in the mounted state is the seating surface 23A of the cartridge 23 as a tip member. Is the first
Similarly to the engaging portion 15 of the chip 5 of the embodiment, the engaging portion 24 having a serrated cross section capable of engaging with the engaging portion 9 formed on the mounting seat surface 4A of the plate 4 is in the mounting state. Side surface 2 of the cartridge 23 facing the tool inner peripheral side
It is formed over the entire surface so as to extend in parallel with 3C. In addition, the side surface 2 on which the chip mounting seat 23B is formed is opposite to the chip mounting seat 23B.
An inclined plane 23D that is gently inclined toward the seating surface 23A toward the direction away from the 3C is formed, and the side surface 23E of the cartridge 23 that faces the tool rear end in the above mounted state is separated from the side surface 23C, That is, the inclined surface is gently inclined toward the tool tip side toward the tool outer peripheral side.

Accordingly, in such a front milling machine in which the chip 22 is formed by attaching the chip 22 to the cartridge 23, the cartridge 23 is inserted into the recess 3 in place of the chip 5 as the chip member of the first embodiment. By attaching the wedge 7, the wedge 7 can be attached in the same manner as in the first embodiment.
When the deflection of the front cutting edge 21 is adjusted by the
It is possible to perform high-precision vibration adjustment while preventing the inclination of 3 or the like. In particular, in the second embodiment, even when the front cutting edge 21, the corner cutting edge 25, and the outer peripheral cutting edge 26 are worn, etc., only the chip 22 mounted on the chip mounting seat 23B of the cartridge 23 is used. The cartridge 23 on which the engaging portion 24, the inclined flat surface 23D, the inclined side surface 23E, etc. are formed can be reused as it is, and is economical. Even if you attach 22
What is necessary is just to replace with the cartridge 23 in which the chip mounting seat 23B of the shape according to the chip 22 was formed, and it becomes possible to provide a highly versatile face milling machine.

On the other hand, in the first embodiment, as described above, the wall surface 3A of the concave portion 3 facing the tool rotation direction T is inclined toward the tool rotation direction T toward the tool tip side, By attaching the substantially flat plate 4 and the chip 5 to the wall surface 3A, the front cutting edge 12 of the chip 5 is given a positive axial rake angle. When the flat plate 4 and the chip 5 are attached, when the chip 5 is pressed vertically to the wall surface 3A by the wedge 6 as a clamp member and fixed, the seating surface 5B of the chip 5 and the recess 3 side are used. As the engaging portions 15 and 9 with the mounting seat surface 4A are also pressed and brought into close contact and engaged with each other, the tip 5 retreats so as to slightly sink into the wall surface 3A side, whereby the front cutting edge 12 is very slight Shake protrudes tool tip side there is a risk that deviate. This is particularly noticeable when the wedge effect occurs as described above, particularly when the engaging portions 15 and 9 are formed in a serrated cross section as in the above embodiment.

Therefore, in the case of performing an ultra-high-precision finished surface processing in which such a slight deviation of the run-out of the front cutting edge is not permitted, the third embodiment of the present invention shown in FIGS. As described above, the seat surface 23A and the mounting seat surface 4A are formed so as to extend parallel to the axis O by forming the wall surface 3A of the recess 3 so as to be parallel to the axis O of the tool body 1, for example. At the same time, the pressing direction by the wedge 6 as the clamp member may be a direction along a plane orthogonal to the axis O. In the third embodiment shown in these figures, the inclined recesses 3 of the first embodiment are formed such that the wall surfaces 3A and 3B, the clamp surface 3E, and the flat surface 3H are parallel to the axis O of the tool main body 1. The plate 4 is mounted on the wall surface 3A so that the wall surface 3C facing the tool tip side is perpendicular to the axis O, and the chip 22 of the second embodiment is inserted into the concave portion 3. Since a chip member constituted by the cartridge and the cartridge 23 is mounted, the same parts as those in the first and second embodiments are also denoted by the same reference numerals, and description thereof is omitted. However,
At the rear end side of the tool body 1 according to the third embodiment, a mounting portion 2 is provided.
An arbor provided with a grip portion 2A that can be gripped by an ATC (automatic tool changer) of a machine tool is provided.

However, in the third embodiment configured as described above, when the wedge 6 as the clamp member is pushed into the first gap to clamp the cartridge 23 of the chip member, the seating surface 23A Engaging part 2
Even if the cartridge 23 sinks into the plate 4 side due to the engagement of the engagement portion 9 of the mounting seat surface 4A of the plate 4 with the plate 4, the cartridge 23 only shifts in a plane direction orthogonal to the axis O, and Since it does not move in the O direction, the deflection of the front cutting edge 21 of the tip 22 does not change. Therefore, according to the third embodiment, it is possible to perform a more strict runout adjustment, and it is sufficient for an ultra-high-precision finishing process in which an extremely slight runout error of the front cutting edge 21 is not allowed. Can be handled. In the third embodiment, the axial rake angle of the front cutting edge 21 and the outer peripheral cutting edge 26 is set to 0 °.
In the case where the tip member is the tip itself as in the first embodiment, only the rake face 5A excluding the inclined face portion 5E is inclined to form such strictness. It is possible to give a positive or negative axial rake angle to the cutting edge, while making it possible to perform a smooth run-out adjustment.

[0033]

As described above, according to the present invention,
An engaging portion engageable with the seating surface on the tip member side and the mounting seat surface on the concave side of the tool body in a direction intersecting the pressing direction by the clamp member and the pressing direction by the adjusting mechanism, in the axial direction of the tool body. By forming to extend toward
Even if the pressing force by the clamp member or the adjusting mechanism is uneven, the tip member does not tilt during the runout adjustment, and the tip member stably projects to be guided along the engaging portion. Therefore, it is possible to precisely arrange the front cutting edge at a predetermined position in the axial direction and to perform high-precision runout adjustment.

[Brief description of the drawings]

FIG. 1 is a partially cutaway side view showing a first embodiment of the present invention (however, a concave portion 3, a chip 5, and the like other than a broken portion are not shown).

FIG. 2 is a bottom view of the embodiment shown in FIG. 1 as viewed from a tool tip side.

FIG. 3 is an enlarged view as viewed in a direction indicated by an arrow X in FIG. 1;

FIG. 4 is a view as viewed in a direction indicated by an arrow Y in FIG. 3;

FIG. 5 is a front cutting edge 1 of the tip 5 of the embodiment shown in FIG.
It is a figure which shows 2 periphery.

FIG. 6 is (A) a plan view, (B) a side view, and (C) a front view of the chip 5 in the embodiment shown in FIG.

FIG. 7 is a partially broken side view showing a second embodiment of the present invention.

8A and 8B are a plan view, a side view, and a side view of the chip 22 and the cartridge 23 in the embodiment shown in FIG.
(C) It is a front view.

FIG. 9 is a partially cutaway side view showing a third embodiment of the present invention.

FIG. 10 is a bottom view of the embodiment shown in FIG. 9 as viewed from a tool tip side.

FIG. 11 is an enlarged view as viewed in the direction of the arrow Z in FIG. 9;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tool main body 3 Recess 3A, 3B, 3C, 3D Wall surface of recess 3 4 Plate 4A Mounting seat surface 5, 22 Chip (tip member) 5B, 23A Seating surface 6 Wedge (clamp member) 7 Wedge (adjustment mechanism) 9, 15 , 24 Engagement part 12, 21 Front cutting edge 23 Cartridge O Axis line of tool body 1 T Tool rotation direction

Continued on the front page F term (reference) 3C022 HH01 HH06 HH09 HH18 LL03 MM02 NN02 QQ03

Claims (6)

[Claims] 1. A chip member having a cutting front blade protruding toward a tool tip side in a concave portion formed on an outer periphery of a tip portion of a substantially disk-shaped tool body rotated about an axis, and a seating surface thereof is clamped by a clamp member. The tool body is pressed detachably on the mounting seat surface provided on the concave side, and the tool main body is pressed against the tool tip side by the tip member to reduce the deflection of the front cutting blade toward the tip side. In a throw-away type face milling machine provided with an adjusting mechanism for adjusting, the seating surface of the tip member and the mounting seat surface on the concave side intersect with the pressing direction of the clamp member and the pressing direction of the adjusting mechanism. The engaging portion that is made engageable in the direction,
A throw-away type face milling machine, each of which is formed so as to extend in the axial direction. 2. The indexable face milling machine according to claim 1, wherein said engaging portion has a serrated cross section. 3. The pressing direction of the clamp member is a direction along a plane orthogonal to the axis.
3. The indexable face milling machine according to claim 1, wherein the seating surface and the mounting seating surface are formed to extend in a direction parallel to the axis. 4. The plate according to claim 1, wherein a plate is detachably attached to the concave portion, and a mounting seat surface on the concave side is formed in the plate. The indexable face milling cutter described. 5. The tip member is a throwaway tip having the front cutting edge formed at a tip end, and the seating surface of the tip member is formed on the throwaway tip. A throw-away type face mill according to any one of claims 1 to 4. 6. The tip member is configured such that a throw-away tip having the front cutting edge formed thereon is detachably attached to a tip end of a cartridge, and the seating surface of the tip member is formed on the cartridge. The indexable face mill according to any one of claims 1 to 4, characterized in that: