JP7020245B2 - Cutting edge position adjustment mechanism and milling tool - Google Patents

Description

The present invention relates to a cutting edge position adjusting mechanism and a milling tool.

Conventionally, a mechanism for adjusting the cutting edge position of Patent Document 1 is known. The cutting edge position adjusting mechanism includes a shaft member that is screwed into the tool body and a nut member that is screwed into the shaft member and abuts on the cutting edge member. When adjusting the cutting edge position, a work tool such as a wrench is used to adjust the screwing amount of the shaft member into the tool body and the screwing amount of the nut member into the shaft member.

Japanese Unexamined Patent Publication No. 2014-213404

In this type of milling tool, a large centrifugal force acts on the adjusting part (adjusting mechanism) during cutting, and the adjusting part may reach the end of its life at an early stage.

In view of the above circumstances, one of the objects of the present invention is to provide a cutting edge position adjusting mechanism and a milling tool capable of extending the life of parts of the adjusting section.

One aspect of the position adjusting mechanism of the cutting edge portion of the present invention is a cutting edge portion arranged on the outer peripheral portion of the tip of the tool body rotated around the central axis, and a shaft of the cutting edge portion on the outer peripheral portion of the tool body. A support portion arranged on the rear end side in the direction, and an adjustment portion supported by the support portion and pressing the cutting edge portion toward the tip end side in the axial direction to adjust the axial position of the cutting edge portion. The adjusting portion is removable with respect to the support portion in a direction intersecting the central axis or in a circumferential direction around the central axis, and the adjusting portion is supported by the support portion. The cutting edge portion is provided with a shaft member to be screwed and a nut member screwed to the shaft member and in contact with the cutting edge portion, and by adjusting the screwing amount of the nut member with respect to the shaft member. The position in the axial direction is adjusted, and the cutting tool is provided with the adjusting portion removed from the tool body .
Further, one aspect of the rolling tool of the present invention is a tool body that is rotated around a central axis, and a plurality of cutting edge portions that are arranged at intervals in the circumferential direction on the outer peripheral portion of the tip of the tool body. , A plurality of support portions arranged on the rear end side of the cutting edge portion in the axial direction on the outer periphery of the tool body, and supported by the support portion, the cutting edge portion is directed toward the tip end side in the axial direction. The cutting edge portion is provided with at least one adjusting portion for adjusting the position of the cutting edge portion in the axial direction, and the adjusting portion is provided with respect to the support portion in a direction intersecting the central axis or around the central axis. Detachable in the circumferential direction, the adjusting portion has a shaft member supported by the support portion and a nut member screwed to the shaft member and in contact with the cutting edge portion. By adjusting the screwing amount of the nut member with respect to the shaft member, the axial position of the cutting edge portion is adjusted, and cutting is performed with the adjusting portion removed from the tool body .

According to one aspect of the cutting edge position adjusting mechanism and the rolling tool of the present invention, the adjusting portion is detachably supported by the supporting portion in the direction intersecting the central axis or in the circumferential direction. Therefore, the adjusting portion can adjust the position of the cutting edge portion in the axial direction, and the adjusting portion can be removed from the posture in which the cutting edge portion is fixed to the tool body (the state in which the cutting edge portion is positioned).

Then, the milling process (cutting process) can be performed with the adjusting portion removed from the tool body. Therefore, a large centrifugal force does not act on the adjusting portion, and the life of the parts of the adjusting portion can be extended. In addition, since the adjusting portion is less likely to break, the durability of the rolling tool as a whole is improved, and the tool life is extended.

Further, in a milling tool, a plurality of cutting edge portions are provided on the outer peripheral portion of the tip of the tool body so as to be arranged in the circumferential direction. It was necessary to provide a part.
On the other hand, according to one aspect of the milling tool of the present invention, since the adjusting portion can be removed from the tool, it is not necessary to prepare the same number of adjusting portions as a plurality of cutting edge portions. For example, it is possible to sequentially perform axial position adjustment work of all cutting edge portions by one adjusting portion. Therefore, the cost of the tool can be reduced. In addition, since the cutting process can be performed with the adjusting portion removed from the milling tool, the weight of the tool can be reduced.
Further, the adjusting portion has a shaft member supported by the support portion and a nut member screwed to the shaft member and in contact with the cutting edge portion, and the nut member is screwed into the shaft member. By adjusting the amount, the position of the cutting edge portion in the axial direction is adjusted.
In this case, by adjusting the screwing amount between the shaft member and the nut member, the position of the cutting edge portion in the axial direction can be easily adjusted.

In the position adjusting mechanism of the cutting edge portion, the shaft member has a first flat surface portion on the outer peripheral surface of the shaft member, and the support portion has a second flat surface portion in contact with the first flat surface portion. Is preferable.

In this case, the contact between the first flat surface portion and the second flat surface portion can prevent the shaft member from rotating around the center line of the shaft member with respect to the support portion. That is, the amount of screwing of the nut member into the shaft member can be adjusted with the shaft member stopped rotating, and the adjustment work becomes easy.

In the position adjusting mechanism of the cutting edge portion, the shaft member has a pair of the first plane portions arranged back to back on the outer peripheral surface of the shaft member, and the support portions are spaced apart from each other. It is preferable to have a pair of the second plane portions arranged to face each other, and the pair of the first plane portions and the pair of the second plane portions are in contact with each other.

In this case, since the pair of first plane portions is sandwiched between the pair of second plane portions, the rotation of the shaft member with respect to the support portion around the center line is further suppressed. Therefore, the work of adjusting the position of the cutting edge portion in the axial direction by the adjusting portion becomes easier.

In the position adjusting mechanism of the cutting edge portion, it is preferable that the shaft member has a thrust receiving portion that contacts the support portion from the tip side in the axial direction.

In this case, the shaft member is supported by the support portion from the rear end side in the axial direction by the thrust receiving portion. Therefore, it is possible to secure a large pressing force for the adjusting portion to press the cutting edge portion toward the tip end side in the axial direction. Therefore, it is easier to adjust the position of the cutting edge portion in the axial direction.

In the position adjusting mechanism of the cutting edge portion, the thrust receiving portion is a columnar shape extending in the axial direction, and the thrust receiving portion is chamfered on the outer peripheral surface of the thrust receiving portion in contact with the outer peripheral surface of the tool body. It is preferable to have a portion.

In this case, since the chamfered portion is provided on the outer peripheral surface of the thrust receiving portion, it is possible to secure a large outer diameter of the thrust receiving portion while arranging the shaft member close to the outer peripheral surface of the tool body. As a result, a large contact area between the thrust receiving portion and the support portion can be secured, the posture of the shaft member can be stabilized, and the pressing force of the adjusting portion can be stably applied to the cutting edge portion.

The position adjusting mechanism of the cutting edge portion is provided with a retaining wall portion that is arranged on the outer periphery of the tool body and faces the rear end surface of the cutting edge portion with a gap from the rear end side in the axial direction. Is preferable.

In this case, even if the cutting process is performed with the adjusting portion removed from the tool, the retaining wall portion suppresses the cutting edge portion from coming out toward the rear end side in the axial direction.

In the position adjusting mechanism of the cutting edge portion, it is preferable that the cutting edge portion is detachably attached to the outer peripheral portion of the tip of the tool body.

In this case, the cutting edge portion is a removable cutting insert or cutting tip, and the cutting tool is a cutting edge exchangeable cutting tool such as a cutting edge exchange type milling cutter. Therefore, when the cutting edge portion reaches the end of its component life, it is possible to maintain good machining accuracy by replacing it with another new cutting edge portion. Further, a plurality of types of cutting edge portions having various cutting edges can be prepared and selectively used according to the type of the work material, the processing form, and the like.

According to the position adjusting mechanism of the cutting edge portion and the rolling tool according to one aspect of the present invention, the life of the parts of the adjusting portion can be extended.

It is a perspective view of the cutting edge exchange type milling cutter (rolling tool) provided with the position adjustment mechanism of the cutting edge portion of one Embodiment of this invention. It is a bottom view (front view) of the cutting edge exchange type milling cutter of FIG. It is a side view of the cutting edge exchange type milling cutter of FIG. It is a vertical cross-sectional view of the cutting edge exchange type milling cutter of FIG. It is a perspective view which shows the adjustment part. It is an exploded perspective view which shows the adjustment part. It is (a) top view, (b) side view and vertical sectional view which show the adjustment part. FIG. 7B is a side view of the adjustment portion of FIG. 7B as viewed from the VIII direction. It is a top view which shows the cutting edge part.

Hereinafter, the blade edge exchange type milling cutter 1 which is an example of the milling tool according to the embodiment of the present invention and the cutting edge position adjusting mechanism 20 provided in the blade edge exchange type milling cutter 1 will be described with reference to the drawings. do.

[Rough configuration of replaceable cutting edge type milling cutter and cutting edge position adjustment mechanism]
The cutting edge exchange type milling cutter 1 of the present embodiment is a milling tool (cutting tool) for milling a work material such as a metal material. In the milling cutter 1 with a replaceable cutting edge, the work material is mainly subjected to milling processing (cutting processing) such as front surface cutting. The face milling is a milling cutter that forms a machined surface perpendicular to the central axis O of the tool body 2 with respect to the work material.

As shown in FIGS. 1 to 4, the position adjusting mechanism 20 of the cutting edge portion includes a cutting edge portion 30, a retaining wall portion 26, a support portion 24, and an adjusting portion 50.
Further, the blade tip exchange type milling cutter 1 includes a tool body 2, a plurality of cutting edge portions 30, a plurality of retaining wall portions 26, a plurality of support portions 24, and at least one adjusting portion 50.

The tool body 2 has a substantially cylindrical shape centered on the central axis O. The tool body 2 is mounted on a spindle of a machine tool (not shown) and is rotated around the central axis O by the spindle.
A plurality of cutting edge portions 30 are arranged on the outer peripheral portion of the tip of the tool body 2 at intervals in the circumferential direction. The cutting edge portion 30 is called a cutting insert or a cutting tip. The cutting edge portion 30 is detachably attached to the outer peripheral portion of the tip of the tool body 2. A plurality of insert mounting seats 4 are provided on the outer peripheral portion of the tip of the tool body 2 at intervals in the circumferential direction. Each cutting edge portion 30 is detachably attached to each insert mounting seat 4.

The cutting edge portion 30 has a cutting edge 7. The cutting edge portion 30 attached to the insert mounting seat 4 is arranged such that the cutting edge portion 7 projects toward the tip end side and the radial outer side with respect to the tool body 2.
In the blade tip exchange type milling cutter 1 of the present embodiment, the insert mounting seat 4 is provided in the tool body 2 at 10 or more locations (for example, 20 locations) at intervals in the circumferential direction, and the cutting edge portion 30 is also provided in the insert mounting seat 4. 10 or more (for example, 20) are provided in the same number as the number of. The blade tip exchange type milling cutter 1 is a so-called multi-blade type milling cutter.

The upper portion of the tool body 2 of the milling cutter 1 having a replaceable cutting edge is attached to the spindle of the machine tool. In the blade tip exchange type milling cutter 1, the tool body 2 is rotated by the spindle in the tool rotation direction T around the central axis O, and is moved in a direction intersecting the central axis O (for example, in a direction orthogonal to the central axis O). Then, the work material is milled by the cutting blades 7 of the plurality of cutting edge portions 30 mounted on the tool body 2.

[Definition of orientation (direction) used in this embodiment]
In the present embodiment, the direction along the central axis O of the tool body 2 (the direction in which the central axis O extends) is referred to as an axial direction. Of the axial directions, the direction from the mounting portion 5 of the tool body 2 mounted on the spindle of the machine tool toward the insert mounting seat 4 and the cutting edge portion 30 is called the tip side, and is from the insert mounting seat 4 and the cutting edge portion 30. The direction toward the mounting portion 5 is called the rear end side.
The direction orthogonal to the central axis O is called the radial direction. Of the radial directions, the direction closer to the central axis O is called the inner side in the radial direction, and the direction away from the central axis O is called the outer side in the radial direction.
The direction that orbits around the central axis O is called the circumferential direction. Of the circumferential directions, the direction in which the tool body 2 is rotated by the spindle of the machine tool during cutting is called the tool rotation direction T, and the rotation direction opposite to this is the direction opposite to (or opposite to) the tool rotation direction T. Tool rotation direction).

[Explanation of tool body 1]
The tool main body 2 has an outer main body portion 21, an inner main body portion 22, a space portion 23, and a coolant hole 3. Further, the tool body 2 has a tip pocket 6, an insert mounting seat 4, and a recessed portion 25. The tip pocket 6, the insert mounting seat 4, and the recessed portion 25 are arranged in the outer main body portion 21.

As shown in FIG. 4, the outer main body portion 21 has a bottomed cylindrical shape. The outer main body portion 21 has a peripheral wall and a bottom wall. The outer main body portion 21 is made of, for example, a steel material.
The inner main body portion 22 is substantially columnar. The inner main body 22 is arranged inside the outer main body 21. That is, the inner main body portion 22 has a portion located inside the outer main body portion 21. The inner main body portion 22 is made of, for example, an aluminum material. The specific gravity of the inner main body portion 22 is smaller than the specific gravity of the outer main body portion 21.

The inner main body portion 22 has a cylindrical portion 22a and a flange portion 22b.
A mounting portion 5 is formed on the rear end surface (upper surface) of the cylindrical portion 22a. The mounting portion 5 is a hole that opens in the rear end surface of the cylindrical portion 22a and is recessed from the rear end surface to the tip end side. The spindle of the machine tool is inserted into the mounting portion 5.
The flange portion 22b extends radially outward from the rear end portion (upper end portion) of the cylindrical portion 22a. The flange portion 22b has a circular ring plate shape. The front end surface (lower surface) of the flange portion 22b faces the rear end surface (upper surface) of the peripheral wall of the outer main body portion 21.

Of the outer peripheral surface of the cylindrical portion 22a, the portion adjacent to the tip end side of the flange portion 22b fits in the rear end opening of the peripheral wall of the outer main body portion 21.
Of the front end surfaces of the cylindrical portion 22a, the outer peripheral end portion and the inner peripheral end portion come into contact with the rear end surface of the bottom wall of the outer main body portion 21 from the rear end side. The columnar portion 22a and the bottom wall of the outer main body portion 21 are fastened by a screw member 40 and fixed to each other.

The space portion 23 is located between the outer main body portion 21 and the inner main body portion 22. The space portion 23 is a lightening space provided inside the tool body 2. The space portion 23 has a first space portion 23a and a second space portion 23b.

The first space portion 23a is arranged between the peripheral wall of the outer main body portion 21 and the outer peripheral surface of the cylindrical portion 22a. The first space portion 23a is a cylindrical space centered on the central axis O.
The second space portion 23b is arranged between the bottom wall of the outer main body portion 21 and the tip surface of the cylindrical portion 22a. The second space portion 23b is a circular ring-shaped space centered on the central axis O. The second space portion 23b is located between the outer peripheral end portion and the inner peripheral end portion of the tip surface of the cylindrical portion 22a. The second space portion 23b constitutes a part of the flow path of the coolant hole 3.

The coolant hole 3 extends inside the tool body 2. The coolant hole 3 penetrates the tool body 2. Coolant (cutting liquid) supplied through the spindle of the machine tool circulates inside the coolant hole 3. The coolant hole 3 has a first coolant hole 3a, a second coolant hole 3b, and a second space portion 23b.

The first coolant hole 3a penetrates the inner main body portion 22. The first coolant hole 3a opens on the inner peripheral surface of the mounting portion 5 and the tip end surface of the cylindrical portion 22a. The tip of the first coolant hole 3a is connected to the second space portion 23b. A plurality (for example, four) of the first coolant holes 3a are provided at intervals in the circumferential direction.
The second coolant hole 3b penetrates the outer main body portion 21. The second coolant hole 3b opens on the rear end surface of the bottom wall of the outer main body 21 and the outer peripheral surface of the peripheral wall. The rear end portion of the second coolant hole 3b is connected to the second space portion 23b. The tip end portion (diametrically outer end portion) of the second coolant hole 3b opens into the tip pocket 6. The tip of the second coolant hole 3b opens toward the cutting edge 7 of the cutting edge portion 30. A plurality of second coolant holes 3b are provided at intervals in the circumferential direction. The number of the second coolant holes 3b is the same as the number of the tip pockets 6 and the number of the cutting edge portions 30 (for example, 20).

A plurality of tip pockets 6 are provided on the outer peripheral portion of the tip of the tool main body 2 (outer main body portion 21) at intervals in the circumferential direction. The tip pocket 6 is formed by being recessed in the outer peripheral portion of the tip of the tool body 2.
The insert mounting seat 4 is arranged adjacent to the outer peripheral portion of the tip of the tool main body 2 (outer main body portion 21) in a direction opposite to the tool rotation direction T of the tip pocket 6. In other words, the tip pocket 6 is arranged adjacent to the insert mounting seat 4 in the tool rotation direction T. The insert mounting seat 4 has a rectangular hole shape or a groove shape, corresponding to the shape of the cutting edge portion 30.
A detailed description of the insert mounting seat 4, a description of the recessed portion 25 and parts other than the above of the tool body 2 will be described separately later.

[Cutting edge]
As shown in FIG. 9, the cutting edge portion 30 is a face milling insert used for, for example, face milling (front milling). As the plurality of cutting edge portions 30 mounted on the tool body 2, only one type having the same shape of the cutting edge 7 may be used, or a plurality of types having different shapes of the cutting edge 7 may be used. You may.
The cutting edge portion 30 extends along the intersecting ridge line between the insert main body 31 attached to the insert mounting seat 4 of the tool main body 2 and the rake face 32 and the flank surface of the insert main body 31, and is arranged on the outer peripheral portion of the tip of the insert main body 31. It has a cutting edge 7 and a cutting edge 7 to be formed.

The insert body 31 has a polygonal plate shape. In the example of this embodiment, the insert body 31 has a rectangular plate shape. When the cutting edge portion 30 is mounted on the insert mounting seat 4, the longitudinal direction of the rectangular surface (front surface and back surface) of the insert body 31 is arranged along the axial direction of the tool body 2 (see FIG. 3). Further, the rectangular surface of the insert body 31 is arranged along the radial direction of the tool body 2 in the lateral direction (see FIG. 2).

The insert main body 31 has a rectangular plate-shaped base metal portion 34 and a triangular plate-shaped blade portion 35 joined to one corner portion of the base metal portion 34 to form a cutting blade 7.
The base metal portion 34 is made of, for example, a cemented carbide. The blade portion 35 is made of an ultra-high pressure sintered body such as a diamond sintered body or a cBN sintered body having a hardness higher than that of the base metal portion 34. However, the present invention is not limited to this, and the entire insert main body 31 including the base metal portion 34 and the blade portion 35 is made of, for example, cemented carbide, and may be integrally formed of a single member.

In the present embodiment, the blade portion 35 is arranged at one corner portion of one polygonal surface (front surface) of the pair of polygonal surfaces (rectangular surfaces) constituting the front surface and the back surface of the insert main body 31. , It is joined to the base metal portion 34 by brazing, integral sintering, or the like. The corner portion is a corner portion located on the outer peripheral portion of the tip of the cutting edge replaceable milling cutter 1 when the cutting edge portion 30 is mounted on the insert mounting seat 4.

A clamp recess 37 recessed in the thickness direction from the polygonal surface is formed on one polygonal surface of the base metal portion 34. In the example of the present embodiment, the clamp recess 37 has a D-shape in a plan view of the cutting edge portion 30 from the thickness direction. However, the clamp recess 37 is not limited to a D shape in a plan view. The depth of the clamp recess 37 becomes deeper from the end opposite to the blade portion 35 toward the blade portion 35 side along the lateral direction of the insert main body 31. That is, the bottom surface of the clamp recess 37 is an inclined surface. When the cutting edge portion 30 is mounted on the insert mounting seat 4, the bottom surface of the clamp recess 37 extends outward in the radial direction in the direction opposite to the tool rotation direction T.

On one polygonal surface of the base metal portion 34, a rib 38 protruding in the thickness direction from the polygonal surface is formed in a portion located between the clamp recess 37 and the blade portion 35. In the plan view of the cutting edge portion 30 shown in FIG. 9, the rib 38 extends linearly substantially parallel to the hypotenuse of the cutting edge portion 35 forming a substantially right-angled triangular shape. The rib 38 is arranged so as to face the blade portion 35 from the longitudinal direction and the lateral direction of the insert main body 31. Therefore, when the cutting edge portion 30 is mounted on the insert mounting seat 4, the rib 38 is arranged to face the cutting edge 7 from the rear end side in the axial direction and from the inside in the radial direction. .. Chips generated by cutting the work material by the cutting edge 7 come into contact with the ribs 38.

As shown in FIG. 2, the thickness of the cutting edge portion 30 increases from the cutting edge portion 35 toward the end portion on the opposite side of the cutting edge portion 35 along the lateral direction of the insert main body 31. That is, when the cutting edge portion 30 is mounted on the insert mounting seat 4, the thickness of the cutting edge portion 30 increases inward in the radial direction.

As shown in FIG. 3, when the cutting edge portion 30 is mounted on the insert mounting seat 4, the axial rake (axial rake angle) of the cutting edge 7 is a positive angle.
In FIG. 9, the portion of the cutting blade 7 extending in the lateral direction of the insert main body 31 is the front blade 7a. The front blade 7a has a linear shape. The front blade 7a is not limited to a straight line, but may be, for example, a convex curve having a large radius of curvature. When the cutting edge portion 30 is mounted on the insert mounting seat 4, the front blade 7a projects from the insert mounting seat 4 toward the tip end side of the tool body 2.
The portion of the cutting edge 7 extending in the longitudinal direction of the insert body 31 is the outer peripheral blade 7b. The outer peripheral blade 7b has a linear shape. When the cutting edge portion 30 is mounted on the insert mounting seat 4, the outer peripheral blade 7b projects from the insert mounting seat 4 toward the radial outer side of the tool body 2.
The portion of the cutting blade 7 located between the front blade 7a and the outer peripheral blade 7b is the corner blade 7c. The corner blade 7c has a convex curve or a straight line. When the cutting edge portion 30 is mounted on the insert mounting seat 4, the corner blade 7c protrudes from the insert mounting seat 4 toward the outer peripheral side of the tip of the tool body 2.

[Explanation of tool body 2]
The insert mounting seat 4 of the tool body 2 will be described in detail.
As shown in FIGS. 1 to 4, the insert mounting seat 4 opens in the tip surface and the outer peripheral surface of the tool body 2 and extends in the axial direction. The insert mounting seat 4 is located at the first wall surface 8 facing the direction opposite to the tool rotation direction T, the second wall surface 9 facing the tool rotation direction T, and the radially inner end of the insert mounting seat 4. It has a third wall surface 10 facing outward in the radial direction, and a clamp screw hole 11.

As shown in FIG. 2, in the example of the present embodiment, the first wall surface 8 is a flat surface extending along a virtual plane (not shown) including the central axis O of the tool body 2, and the third wall surface 10 is a second wall surface. 1 It is a plane shape that is substantially orthogonal to the wall surface 8. Further, the second wall surface 9 extends in the tool rotation direction T as it goes outward in the radial direction. Therefore, the distance between the second wall surface 9 and the first wall surface 8 (the width in the circumferential direction of the insert mounting seat 4) becomes smaller as it goes outward in the radial direction.

The cutting edge portion 30 is inserted toward the rear end side in the axial direction with respect to the insert mounting seat 4. When the cutting edge portion 30 is inserted into the insert mounting seat 4, the surface (one polygonal surface) of the cutting edge portion 30 facing in the thickness direction comes into contact with the first wall surface 8. When the cutting edge portion 30 is fixed with the clamp screw 19 as described later, a slight gap is provided between the surface of the cutting edge portion 30 facing in the thickness direction and the first wall surface 8. The back surface (the other polygonal surface) of the cutting edge portion 30 facing the thickness direction comes into contact with the second wall surface 9. The side surface of the cutting edge portion 30 facing the lateral side comes into contact with the third wall surface 10. The cutting edge portion 30 is sandwiched between the first wall surface 8 and the second wall surface 9 from the circumferential direction.
In the example of the present embodiment, as described above, the width of the insert mounting seat 4 in the circumferential direction becomes smaller as it goes outward in the radial direction, so that the cutting edge portion 30 inserted into the insert mounting seat 4 is the insert mounting seat. Movement to the outside in the radial direction with respect to 4 is suppressed. That is, the cutting edge portion 30 is prevented from coming out from the insert mounting seat 4 to the outside in the radial direction.

The clamp screw hole 11 opens in the outer peripheral surface (tip pocket 6) of the tool body 2 and the first wall surface 8. A female screw portion is formed on the inner peripheral surface of the clamp screw hole 11. The clamp screw hole 11 extends inward in the radial direction according to the direction opposite to the tool rotation direction T. A clamp screw 19 is screwed into the clamp screw hole 11. The tip of the clamp screw 19 comes into contact with the bottom surface of the clamp recess 37 of the cutting edge portion 30. By screwing the clamp screw 19 into the clamp screw hole 11, the cutting edge portion 30 is fixed to the insert mounting seat 4.

As shown in FIGS. 1, 3 and 4, the recess 25 is arranged on the outer peripheral surface of the tool body 2 (outer body 21), and is radially from the outer peripheral surface of the tool body 2 (intermediate portion 2b described later). It dents inward. The number of recesses 25 is the same as the number of cutting edge portions 30 and the number of insert mounting seats 4. In the example of this embodiment, there are 10 or more recesses 25 (for example, 20) on the outer periphery of the tool body 2. It will be provided.

The recess 25 is located on the rear end side of the insert mounting seat 4. The recess 25 is connected to the rear end of the insert mounting seat 4. When viewed from the axial direction, the recess 25 and the insert mounting seat 4 are arranged so as to overlap each other. When viewed from the radial direction, the recessed portion 25 and the rear end portion of the cutting edge portion 30 are arranged so as to overlap each other. Of the rear end portions of the cutting edge portion 30, the end portion on the inner side in the radial direction is located in the recessed portion 25. In the example of this embodiment, the recess 25 has a rectangular hole shape. The recess 25 extends in the circumferential direction.

[Retaining wall]
The retaining wall portion 26 is arranged on the outer periphery of the tool main body 2 (outer main body portion 21). In the example of the present embodiment, the retaining wall portion 26 constitutes a part of the inner wall of the recessed portion 25. The retaining wall portion 26 is a wall portion of the inner wall of the recessed portion 25 that is located at the rear end portion of the recessed portion 25 and faces the tip end side. A plurality of retaining wall portions 26 are arranged on the outer periphery of the tool body 2 at intervals in the circumferential direction. The number of retaining wall portions 26 is the same as the number of recessed portions 25.

The retaining wall portion 26 faces the rear end surface of the cutting edge portion 30 (insert main body 31) with a gap from the rear end side in the axial direction. When viewed from the axial direction, the retaining wall portion 26 and the rear end surface of the cutting edge portion 30 are arranged so as to overlap each other.

[Support part]
The support portion 24 is arranged on the outer periphery of the tool body 2 on the rear end side in the axial direction of the cutting edge portion 30. A plurality of support portions 24 are arranged on the outer peripheral surface of the tool body 2 at intervals in the circumferential direction. The support portion 24 is arranged on the outer periphery of the tool body 2 on the rear end side of the plurality of cutting edge portions 30 in the axial direction. The number of support portions 24 is the same as the number of cutting edge portions 30, and in the example of the present embodiment, 10 or more support portions 24 (for example, 20) are provided on the outer periphery of the tool body 2. The support portion 24 is arranged at the rear end portion of the outer peripheral surface of the peripheral wall of the outer main body portion 21. The support portion 24 is located on the rear end side in the axial direction of the adjustment portion 50 mounted on the outer periphery of the tool body 2 to support the adjustment portion 50.

The support portion 24 projects outward in the radial direction on the outer peripheral surface of the tool body 2. The support portion 24 projects outward in the radial direction from the portion 2a of the outer peripheral surface of the tool body 2 that is adjacent to the support portion 24 in the circumferential direction (the portion facing the circumferential direction) 2a. The portion 2a may be rephrased as a portion 2a between the support portions 24 adjacent to each other in the circumferential direction on the outer peripheral surface of the tool body 2.
The support portion 24 projects outward in the radial direction from the portion of the outer peripheral surface of the tool body 2 adjacent to the tip end side of the support portion 24 (intermediate portion 2b described later).

The support portion 24 has a rib shape extending in the axial direction. The support portion 24 has a pair of ribs that extend axially and are spaced apart from each other in the circumferential direction. The support portion 24 has a second flat surface portion 24b on a surface facing the circumferential direction of the rib. The second plane portion 24b has a plane shape extending in a direction substantially perpendicular to the circumferential direction. The second flat surface portion 24b comes into contact with the first flat surface portion 53a of the adjusting unit 50, which will be described later. The support portion 24 has a pair of second plane portions 24b arranged so as to face each other at a distance from each other. In the example of the present embodiment, the pair of second plane portions 24b are arranged so as to face each other in the circumferential direction. The pair of second plane portions 24b are arranged on a pair of ribs facing each other in the circumferential direction. The tip surface of the support portion 24 (a pair of ribs) has a planar portion perpendicular to the central axis O.

When viewed from the axial direction, the support portion 24, the recessed portion 25, the insert mounting seat 4, and the cutting edge portion 30 are arranged so as to overlap each other. When the adjusting portion 50 is attached to the outer periphery of the tool body 2, the supporting portion 24, the adjusting portion 50, the recessed portion 25, the insert mounting seat 4, and the cutting edge portion 30 are attached to each other when viewed from the axial direction. They are placed on top of each other.

[Adjustment section]
The adjusting portion 50 is arranged on the outer periphery of the tool main body 2 (outer main body portion 21). The cutting edge replaceable milling cutter 1 includes at least one adjusting unit 50. The adjusting portion 50 is supported by the supporting portion 24. The adjusting portion 50 presses the cutting edge portion 30 toward the tip end side in the axial direction, and adjusts the position of the cutting edge portion 30 in the axial direction. The adjusting unit 50 adjusts the axial position of the cutting edge 7 by adjusting the axial position of the cutting edge portion 30 with respect to the tool body 2.

The adjusting portion 50 is removable with respect to the supporting portion 24 in a direction intersecting the central axis O or in a circumferential direction around the central axis O. In the example of the present embodiment, the adjusting portion 50 is removable with respect to the supporting portion 24 in the radial direction orthogonal to the central axis O. Then, in a state where the adjusting portion 50 is removed from the tool (support portion 24), the cutting edge exchange type milling cutter 1 cuts the work material.

As shown in FIGS. 3 to 8, the adjusting portion 50 includes a shaft member 51 and a nut member 52. The shaft member 51 is supported by the support portion 24. The nut member 52 is screwed to the shaft member 51 and comes into contact with the cutting edge portion 30. Specifically, the shaft member 51 is supported by the support portion 24 from both sides in the circumferential direction, and is supported from the rear end side in the axial direction.
The center line C of the shaft member 51 extends along the axial direction of the tool body 2. Therefore, the direction in which the center line C of the shaft member 51 extends corresponds to the axial direction of the tool body 2.

The shaft member 51 is a thrust located between the detent shaft 53 located at the rear end of the shaft member 51, the screw shaft 54 located at the tip, and the detent shaft 53 and the screw shaft 54 along the axial direction. It has a receiving portion 55 and.

The detent shaft 53 has a first flat surface portion 53a on the outer peripheral surface of the detent shaft 53. That is, the shaft member 51 has a first flat surface portion 53a on the outer peripheral surface of the shaft member 51. The first flat surface portion 53a has a planar shape extending in the axial direction. The detent shaft 53 has a pair of first plane portions 53a arranged back to back on the outer peripheral surface of the detent shaft 53. That is, the shaft member 51 has a pair of first plane portions 53a arranged back to back on the outer peripheral surface of the shaft member 51. The pair of first plane portions 53a face each other in a direction orthogonal to the center line C. The pair of first plane portions 53a are arranged so as to face each other in a direction orthogonal to the center line C.

The pair of first plane portions 53a of the shaft member 51 and the pair of second plane portions 24b of the support portion 24 are in contact with each other. Therefore, the detent shaft 53 is sandwiched in the detent state by the pair of ribs of the support portion 24. That is, the shaft member 51 is supported with respect to the support portion 24 in a state where rotation around the center line C is restricted (rotation stop state).
The screw shaft 54 has a male screw portion on the outer peripheral surface of the screw shaft 54.

The thrust receiving portion 55 is a columnar shape extending in the axial direction. The outer diameter of the thrust receiving portion 55 is larger than the outer diameter of the detent shaft 53 and the outer diameter of the screw shaft 54. The thrust receiving portion 55 contacts the support portion 24 from the tip side in the axial direction. The rear end surface of the thrust receiving portion 55 comes into contact with the tip end surfaces of the pair of ribs of the support portion 24 from the tip end side. The rear end surface of the thrust receiving portion 55 has a planar shape extending in a direction perpendicular to the center line C (center axis O).

The thrust receiving portion 55 has a chamfered portion 55a on the outer peripheral surface of the thrust receiving portion 55 that comes into contact with the outer peripheral surface of the tool body 2. In the example of this embodiment, the chamfered portion 55a has a planar shape extending in the axial direction. The chamfered portion 55a comes into contact with an intermediate portion 2b described later on the outer peripheral surface of the tool body 2. The thrust receiving portion 55 is supported from the inside in the radial direction on the outer peripheral surface of the tool body 2.

The nut member 52 has a cylindrical shape centered on the center line C. In the example of the present embodiment, the outer diameter of the nut member 52 is larger than the outer diameter of the detent shaft 53 and smaller than the outer diameter of the thrust receiving portion 55. The nut member 52 has a female threaded portion on the inner peripheral surface of the nut member 52. The nut member 52 is screwed to the screw shaft 54.

A nut operation hole 52a opens on the outer peripheral surface of the nut member 52. A plurality of nut operation holes 52a (for example, four at equal intervals) are provided on the outer peripheral surface of the nut member 52 at intervals around the center line C. The nut operation hole 52a extends in a direction orthogonal to the center line C. In the example of the present embodiment, the nut operation hole 52a is a through hole that penetrates the nut member 52 in the direction orthogonal to the center line C. A work tool such as a wrench (not shown) is inserted into the nut operation hole 52a.
As shown in FIG. 4, the radial position of the radial outer end of the nut member 52 is inside the radial position of the radial outer end (outer peripheral blade 7b) of the cutting edge portion 30. ..

The front end surface of the nut member 52 comes into contact with the rear end surface of the cutting edge portion 30 from the rear end side.
Therefore, in the state where the clamp screw 19 is loosened or temporarily tightened, the axial position of the cutting edge portion 30 is adjusted by adjusting the screwing amount of the nut member 52 with respect to the shaft member 51. That is, by operating the work tool to rotate the nut member 52 around the center line C, the axial positions of the cutting edge portion 30 and the cutting edge 7 can be adjusted with respect to the insert mounting seat 4. .. After adjusting the position of the cutting edge portion 30, the cutting edge portion 30 is fixed to the insert mounting seat 4 by screwing in the clamp screw 19 and finally tightening the clamp screw 19. In the state where the clamp screw 19 is fully tightened, the axial position of the cutting edge portion 30 may be finely adjusted by adjusting the screwing amount of the nut member 52 with respect to the shaft member 51.

[Explanation of tool body 3]
Parts other than the above of the tool body 2 will be described.
Of the outer peripheral surface of the tool body 2 (outer body 21), the tip (the end where the insert mounting seat 4 and the tip pocket 6 are located) and the rear end (the support 24 and the portion 2a are located) along the axial direction are located. The portion located between the end portion) is the intermediate portion 2b. The front end portion and the rear end portion of the outer peripheral portion of the tool body 2 have a portion that protrudes radially outward from the intermediate portion 2b.

Seen from the radial direction, the intermediate portion 2b and the adjusting portion 50 are arranged so as to overlap each other. The intermediate portion 2b has a portion of the outer peripheral surface of the tool body 2 adjacent to the adjusting portion 50 in the circumferential direction. Specifically, the intermediate portion 2b has a portion adjacent to the nut member 52 in the circumferential direction. That is, the outer peripheral surface of the tool body 2 has a portion adjacent to the adjusting portion 50 in the circumferential direction, and this portion is a part of the intermediate portion 2b.

In the cross-sectional view perpendicular to the central axis O, the intermediate portion 2b has an arc shape centered on the central axis O. Therefore, when the tool main body 2 (outer main body portion 21) is manufactured, the intermediate portion 2b can be formed by turning.

The radial position of the intermediate portion 2b is inside the radial position of the adjusting portion 50. In other words, the adjusting portion 50 is arranged so as to project radially outward from the intermediate portion 2b of the outer peripheral surface of the tool body 2. In the example of the present embodiment, the radial position of the intermediate portion 2b is inside the radial position of the center line C of the adjusting portion 50.
In the example of the present embodiment, the radial position of the intermediate portion 2b is radially outside the radial position of the portion 2a between the support portions 24 adjacent to each other in the circumferential direction on the outer peripheral surface of the tool body 2. Is.

[Action and effect of this embodiment]
According to the cutting edge portion position adjusting mechanism 20 and the blade tip exchange type milling cutter 1 of the present embodiment described above, the adjusting portion 50 is removed from the support portion 24 in the direction intersecting the central axis O or in the circumferential direction. It is supported freely. Therefore, the adjusting unit 50 adjusts the position of the cutting edge portion 30 in the axial direction, and the adjusting unit 50 is moved from the posture in which the cutting edge portion 30 is fixed to the tool body 2 (the state in which the cutting edge portion 30 is positioned). Can be removed.

Then, the milling process (cutting process) can be performed with the adjusting portion 50 removed from the tool body 2. Therefore, a large centrifugal force does not act on the adjusting unit 50, and the life of the parts of the adjusting unit 50 can be extended. Further, since the adjusting portion 50 is less likely to be broken, the durability of the replaceable cutting edge type milling cutter 1 as a whole is improved, and the tool life is extended.

Further, in the blade tip exchange type milling cutter, a plurality of cutting edge portions are provided on the outer peripheral portion of the tip of the tool body arranged in the circumferential direction. In the conventional structure, the same number of cutting edge portions as the cutting edge portions are provided on the outer peripheral portion of the tool body. It was necessary to provide an adjustment part only.
On the other hand, according to the blade tip exchange type milling cutter 1 of the present embodiment, since the adjusting portion 50 can be removed from the tool, it is not necessary to prepare the same number of adjusting portions 50 as the plurality of cutting edge portions 30. For example, one adjusting unit 50 can sequentially perform axial position adjustment work of all cutting edge portions 30. Therefore, the cost of the tool can be reduced. Further, since the cutting process can be performed with the adjusting portion 50 removed from the cutting edge replaceable milling cutter 1, the tool can be reduced in weight.

Further, in the present embodiment, the adjusting portion 50 is removable in the radial direction orthogonal to the central axis O with respect to the supporting portion 24.
Therefore, the structure of the position adjusting mechanism 20 of the cutting edge portion can be simplified, and the work of attaching and detaching the adjusting portion 50 to and from the support portion 24 becomes easier.

Further, in the present embodiment, the axial position of the cutting edge portion 30 is adjusted by adjusting the screwing amount of the nut member 52 with respect to the shaft member 51.
Therefore, the position of the cutting edge portion 30 in the axial direction can be easily adjusted.

Further, in the present embodiment, the shaft member 51 rotates around the center line C with respect to the support portion 24 when the first flat surface portion 53a of the shaft member 51 and the second flat surface portion 24b of the support portion 24 come into contact with each other. It can be suppressed. That is, the amount of screwing of the nut member 52 into the shaft member 51 can be adjusted with the shaft member 51 stopped rotating, and the adjustment work becomes easy.

Further, in the present embodiment, the pair of first plane portions 53a and the pair of second plane portions 24b are in contact with each other.
In this case, since the pair of first plane portions 53a is sandwiched between the pair of second plane portions 24b, the rotation of the shaft member 51 with respect to the support portion 24 around the center line C is further suppressed. Therefore, the axial position adjustment work of the cutting edge portion 30 by the adjusting portion 50 becomes easier.

Further, in the present embodiment, the thrust receiving portion 55 of the shaft member 51 comes into contact with the support portion 24 from the tip side in the axial direction.
Therefore, the shaft member 51 is supported by the support portion 24 from the rear end side in the axial direction by the thrust receiving portion 55. Therefore, the adjusting portion 50 can secure a large pressing force for pressing the cutting edge portion 30 toward the tip end side in the axial direction. Therefore, it is easier to adjust the position of the cutting edge portion 30 in the axial direction.

Further, in the present embodiment, since the chamfered portion 55a is provided on the outer peripheral surface of the thrust receiving portion 55, the outer diameter of the thrust receiving portion 55 can be largely secured while the shaft member 51 is arranged close to the outer peripheral surface of the tool body 2. As a result, a large contact area between the thrust receiving portion 55 and the support portion 24 can be secured, the posture of the shaft member 51 is stabilized, and the pressing force of the adjusting portion 50 is stably applied to the cutting edge portion 30. Can be done.

Further, in the present embodiment, the retaining wall portion 26 on the outer periphery of the tool body 2 faces the rear end surface of the cutting edge portion 30 with a gap from the rear end side in the axial direction.
Therefore, even if the cutting process is performed with the adjusting portion 50 removed from the tool, the retaining wall portion 26 suppresses the cutting edge portion 30 from coming out toward the rear end side in the axial direction.

Further, in the present embodiment, the cutting edge portion 30 is detachably attached to the outer peripheral portion (insert mounting seat 4) at the tip of the tool body 2.
That is, the cutting edge portion 30 is a removable cutting insert or cutting tip. Therefore, when the cutting edge portion 30 has reached the end of its component life, it is possible to maintain good machining accuracy by replacing it with another new cutting edge portion 30. Further, a plurality of types of cutting edge portions 30 having various cutting edge 7s can be prepared and selectively used according to the type of the work material, the processing form, and the like.

Further, in the present embodiment, the radial position of the intermediate portion 2b of the outer peripheral surface of the tool body 2 is arranged radially inside the radial position of the adjusting portion 50. Therefore, when the adjusting portion 50 is operated to adjust the position of the cutting edge portion 30 in the axial direction, the intermediate portion 2b of the outer peripheral surface of the tool body 2 is less likely to interfere with the adjusting work. That is, it is possible to prevent a working tool such as a wrench used when operating the adjusting unit 50 from coming into contact with the intermediate portion 2b. Therefore, the workability of adjusting the position of the cutting edge portion 30 is improved.

Further, since the radial position of the intermediate portion 2b of the outer peripheral surface of the tool body 2 is radially inside the radial position of the adjusting portion 50, excess meat from the outer peripheral surface of the tool body 2, that is, the tool Metal parts that are not necessary to ensure rigidity can be reduced, and tools can be made lighter.

Further, in the present embodiment, the radial position of the intermediate portion 2b of the outer peripheral surface of the tool body 2 is radially inside the radial position of the center line C of the adjusting portion 50.
Therefore, it is possible to further prevent a work tool such as a wrench that operates the adjusting portion 50 from coming into contact with the intermediate portion 2b, and the workability of adjusting the position of the cutting edge portion 30 is improved. Further, in the intermediate portion 2b of the outer peripheral surface of the tool body 2, excess meat can be further reduced and the tool can be made lighter.

Further, in the present embodiment, the support portion 24 projects outward in the radial direction from the portion 2a of the outer peripheral surface of the tool body 2 adjacent to the support portion 24 in the circumferential direction. That is, the radial position of the portion 2a is arranged radially inside the radial position of the support portion 24. As a result, excess meat in the vicinity of the support portion 24 on the outer peripheral surface of the tool body 2 can be reduced, and the weight of the tool can be further reduced.

Further, in the present embodiment, the specific gravity of the inner main body portion 22 of the tool main body 2 is smaller than the specific gravity of the outer main body portion 21.
Therefore, of the tool body 2, the outer main body 21 that requires high rigidity is made of, for example, steel, which makes it easy to secure rigidity, and the inner main body 22 is made of lightweight, for example, aluminum. The total weight of 2 can be reduced. That is, for example, unlike the case of the present embodiment, the weight of the tool can be reduced according to the present embodiment as compared with the case where the entire tool body is made of steel. Therefore, the weight of the tool can be reduced while ensuring the rigidity of the tool.

Further, in the present embodiment, since the space portion 23 is provided between the outer main body portion 21 and the inner main body portion 22, the tool main body 2 can be lightened to reduce the weight, and the tool can be made lighter.
In this embodiment, a part of the space portion 23 (second space portion 23b) is used as the flow path portion of the coolant hole 3. Therefore, the coolant can be temporarily stored in a part of the space portion 23, the amount of the coolant ejected to the cutting edge portion 30 can be stabilized, and the coolant between the plurality of coolant holes 3 (second coolant holes 3b) can be stored. It is possible to easily equalize the ejection balance.

[Other configurations included in the present invention]
The present invention is not limited to the above-described embodiment, and the configuration can be changed without departing from the spirit of the present invention, for example, as described below.

In the above-described embodiment, the pair of second plane portions 24b of the support portions 24 are arranged so as to face each other in the circumferential direction, but the present invention is not limited to this. For example, the pair of second plane portions 24b may be arranged so as to face each other in the radial direction. In this case, the adjusting portion 50 is removable with respect to the supporting portion 24 in the circumferential direction around the central axis O.
Further, the number of the first plane portions 53a included in the shaft member 51 is not limited to a pair, and may be only one. Even in this case, the detent shaft 53 is sandwiched between the pair of ribs of the support portion 24, so that the detent function can be obtained.

In the above-described embodiment, an example in which the nut operation hole 52a is opened on the outer peripheral surface of the nut member 52 has been given. Then, a work tool such as a wrench is inserted into the nut operation hole 52a, and the nut member 52 is rotated around the center line C. Not limited to this, for example, the outer peripheral surface of the nut member 52 may have a polygonal shape such as a hexagon in a cross-sectional view perpendicular to the center line C. Then, the nut member 52 may be rotated around the center line C by a work tool such as a spanner.
Further, the adjusting portion 50 may press the cutting edge portion 30 toward the tip end side in the axial direction so that the axial position of the cutting edge portion 30 can be adjusted. In the reference example of the present invention, the shaft member 51 The configuration is not limited to the configuration having the nut member 52 and the nut member 52.

In the above-described embodiment, the example in which the retaining wall portion 26 is arranged in each of the plurality of recessed portions 25 has been given, but the present invention is not limited to this. For example, only one retaining wall portion 26 may be provided on the outer peripheral surface of the tool body 2 so as to extend over the entire circumference in the circumferential direction.

In the above-described embodiment, the cutting edge portion 30 is detachably attached to the outer peripheral portion of the tip of the tool body 2, but the present invention is not limited to this. The cutting edge portion 30 may be attached to the tool body 2 so that its position can be adjusted in the axial direction, and may be attached to the outer peripheral portion of the tip of the tool body 2 in a non-removable manner. That is, the milling tool is not limited to the cutting edge replaceable milling cutter 1.

In addition, as long as it does not deviate from the gist of the present invention, each configuration (component) described in the above-described embodiments, modifications, and notes may be combined, and additions, omissions, substitutions, and the like of the configurations may be combined. It can be changed. Further, the present invention is not limited to the above-described embodiments, but is limited only to the scope of claims.

1 ... Milling cutter with replaceable cutting edge (rolling tool)
2 ... Tool body 20 ... Cutting edge position adjustment mechanism 24 ... Supporting part 24b ... Second flat surface part 26 ... Retaining wall part 30 ... Cutting edge part 50 ... Adjusting part 51 ... Shaft member 52 ... Nut member 53a ... First Flat surface part 55 ... Thrust receiving part 55a ... Chamfering part O ... Central axis

Claims (8)

A cutting edge located on the outer periphery of the tip of the tool body that is rotated around the central axis,
A support portion arranged on the rear end side in the axial direction of the cutting edge portion on the outer circumference of the tool body, and a support portion.
It is provided with an adjusting portion that is supported by the supporting portion and presses the cutting edge portion toward the tip end side in the axial direction to adjust the axial position of the cutting edge portion.
The adjusting portion is removable with respect to the support portion in a direction intersecting the central axis or in a circumferential direction around the central axis .
The adjustment unit
The shaft member supported by the support portion and
It has a nut member that is screwed to the shaft member and comes into contact with the cutting edge portion.
By adjusting the screwing amount of the nut member with respect to the shaft member, the axial position of the cutting edge portion is adjusted.
A cutting edge position adjusting mechanism provided in a rolling tool that performs cutting with the adjusting portion removed from the tool body . The position adjusting mechanism for the cutting edge portion according to claim 1 .
The shaft member has a first flat surface portion on the outer peripheral surface of the shaft member.
The support portion is a position adjusting mechanism for a cutting edge portion having a second flat surface portion in contact with the first flat surface portion. The position adjusting mechanism for the cutting edge according to claim 2 .
The shaft member has a pair of the first plane portions arranged back to back on the outer peripheral surface of the shaft member.
The support portion has a pair of the second plane portions that are spaced apart from each other and are arranged to face each other.
A position adjusting mechanism for a cutting edge portion in which a pair of the first flat surface portions and a pair of the second flat surface portions are in contact with each other. The position adjusting mechanism for a cutting edge according to any one of claims 1 to 3 .
The shaft member is a position adjusting mechanism for a cutting edge portion having a thrust receiving portion that contacts the support portion from the tip end side in the axial direction. The position adjusting mechanism for the cutting edge according to claim 4 .
The thrust receiving portion is a columnar shape extending in the axial direction and has a columnar shape.
The thrust receiving portion is a position adjusting mechanism for a cutting edge portion having a chamfered portion in contact with the outer peripheral surface of the tool body on the outer peripheral surface of the thrust receiving portion. The position adjusting mechanism for a cutting edge according to any one of claims 1 to 5 .
A position adjusting mechanism for a cutting edge portion, which is arranged on the outer periphery of the tool body and includes a retaining wall portion that faces the rear end surface of the cutting edge portion with a gap from the rear end side in the axial direction. The position adjusting mechanism for a cutting edge according to any one of claims 1 to 6 .
The cutting edge portion is a position adjusting mechanism for the cutting edge portion that is detachably attached to the outer peripheral portion of the tip of the tool body. The tool body that can be rotated around the central axis and
A plurality of cutting edge portions arranged at intervals in the circumferential direction on the outer peripheral portion of the tip of the tool body, and
A plurality of support portions arranged on the rear end side in the axial direction of the plurality of cutting edge portions on the outer periphery of the tool body, and a plurality of support portions, respectively.
It is provided with at least one adjusting portion which is supported by the supporting portion and presses the cutting edge portion toward the tip end side in the axial direction to adjust the axial position of the cutting edge portion.
The adjusting portion is removable with respect to the support portion in a direction intersecting the central axis or in a circumferential direction around the central axis .
The adjustment unit
The shaft member supported by the support portion and
It has a nut member that is screwed to the shaft member and comes into contact with the cutting edge portion.
By adjusting the screwing amount of the nut member with respect to the shaft member, the axial position of the cutting edge portion is adjusted.
A rolling tool that performs cutting with the adjusting part removed from the tool body .

Images