JP2019177442A - Cutting blade part-position adjustment mechanism and rotary cutting tool - Google Patents

Abstract

To provide a cutting blade part-position adjustment mechanism that can elongate a service life of a component of an adjustment part and a rotary cutting tool.SOLUTION: The cutting blade part-position adjustment mechanism comprises: cutting blade parts 30 arranged at an outer periphery part at a tip of a tool main body 2 that is rotated around a center shaft O; support parts 24 arranged at rear end sides in a shaft direction of the cutting blade parts 30 in the outer periphery of the cutting main body 2; and adjustment parts 50, supported by the support part 24, which press the cutting blade parts 30 toward the tip in the shaft direction to adjust positions in the shaft direction of the cutting blade parts 30. The adjustment parts 50 can be freely attached to and detached from, in a direction crossing the center shaft O or in a circumferential direction around the center shaft O, the support parts 24.SELECTED DRAWING: Figure 3

Description

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

  Conventionally, the adjustment mechanism of the cutting edge position of patent document 1 is known. The adjusting mechanism of the cutting edge position includes a shaft member that is screwed to the tool body, and a nut member that is screwed to the shaft member and contacts the cutting blade member. When adjusting the cutting edge position, the amount of screwing of the shaft member into the tool main body or the amount of screwing of the nut member into the shaft member is adjusted using a work tool such as a wrench.

JP 2014-213404 A

  In this type of rolling tool, during cutting, a large centrifugal force acts on the adjustment section (adjustment mechanism), and the adjustment section may reach the part life early.

  In view of the above circumstances, an object of the present invention is to provide a position adjusting mechanism and a cutting tool for a cutting edge part that can extend the life of a part of the adjusting part.

One aspect of the position adjustment mechanism of the cutting blade portion of the present invention is a cutting blade portion disposed at the outer periphery of the tip of the tool body rotated about a central axis, and the axis of the cutting blade portion on the outer periphery of the tool body. A support portion disposed on the rear end side in the direction, and an adjustment portion that is supported by the support portion and adjusts the axial position of the cutting blade portion by pressing the cutting blade portion toward the distal end side in the axial direction. The adjustment part is detachable from the support part in a direction intersecting the central axis or in a circumferential direction around the central axis.
One aspect of the rolling tool of the present invention includes a tool main body that is rotated around a central axis, and a plurality of cutting blade portions that are arranged at intervals in the circumferential direction on the outer periphery of the tip of the tool main body. A plurality of support portions disposed on the rear end side in the axial direction of the plurality of cutting blade portions on the outer periphery of the tool body, and supported by the support portion, with the cutting blade portion facing the tip end side in the axial direction. And at least one adjustment unit that adjusts the axial position of the cutting blade part by pressing, and the adjustment part is in a direction intersecting the central axis or around the central axis with respect to the support part. Detachable in the circumferential direction.

  According to one aspect of the position adjustment mechanism and the cutting tool of the cutting edge part of the present invention, the adjustment part is supported by the support part so as to be removable in the direction intersecting the central axis or in the circumferential direction. For this reason, the adjustment part can be removed from the posture in which the position of the cutting blade part in the axial direction is adjusted by the adjustment part and the cutting blade part is fixed with respect to the tool body (the state where the cutting blade part is positioned).

  Then, it is possible to carry out a rolling process (cutting process) with the adjustment unit removed from the tool body. Therefore, a large centrifugal force does not act on the adjusting portion, and the component life of the adjusting portion can be extended. Further, since the adjusting portion is not easily broken, the durability of the entire turning tool is improved and the tool life is extended.

Moreover, in a cutting tool, a plurality of cutting edges are provided in the circumferential direction on the outer periphery of the tip of the tool body. In the conventional structure, the same number of cutting edges are adjusted on the outer periphery of the tool body. It was necessary to provide a part.
On the other hand, according to one aspect of the rolling tool of the present invention, since the adjustment part can be freely detached from the tool, it is not necessary to prepare the same number of adjustment parts as the plurality of cutting blade parts. For example, the position adjustment operation in the axial direction of all the cutting edge portions can be sequentially performed by one adjustment portion. Therefore, the cost of the tool can be reduced. Moreover, since the cutting can be performed with the adjustment unit removed from the turning tool, the weight of the tool can be reduced.

  In the position adjusting mechanism for the cutting edge part, it is preferable that the adjusting part is detachable in a radial direction perpendicular to the central axis with respect to the support part.

  In this case, the structure of the position adjusting mechanism for the cutting edge can be simplified, and the work of attaching and detaching the adjusting part to the support part becomes easier.

  In the position adjusting mechanism of the cutting blade part, the adjusting part has a shaft member supported by the support part, and a nut member screwed to the shaft member and in contact with the cutting blade part, It is preferable that the position of the cutting blade portion in the axial direction is adjusted by adjusting the screwing amount of the nut member with respect to the shaft member.

  In this case, the axial position of the cutting blade portion can be easily adjusted by adjusting the screwing amount of the shaft member and the nut member.

  In the position adjusting mechanism for the cutting edge, the shaft member has a first flat surface portion on an 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 preferred.

  In this case, the shaft member can be prevented from rotating around the center line of the shaft member with respect to the support portion by contacting the first plane portion and the second plane portion. That is, the screwing amount of the nut member relative to the shaft member can be adjusted in a state where the shaft member is prevented from rotating, and the adjustment work is facilitated.

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

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

  In the above-described position adjusting mechanism of the cutting edge part, it is preferable that the shaft member has a thrust receiving part that comes into contact with the support part from the tip side in the axial direction.

  In this case, the shaft member is supported by the support portion from the axial rear end side by the thrust receiving portion. For this reason, the adjustment part can ensure large pressing force which presses a cutting blade part toward the front end side of an axial direction. Therefore, it is easier to adjust the position of the cutting edge in the axial direction.

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

  In this case, since the chamfered portion is provided on the outer peripheral surface of the thrust receiving portion, it is possible to ensure 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, and 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.

  In the position adjusting mechanism of the cutting edge part, a retaining wall part disposed on the outer periphery of the tool body and facing the rear end surface of the cutting edge part with a gap from the rear end side in the axial direction is provided. Is preferred.

  In this case, even when cutting is performed with the adjustment unit removed from the tool, the retaining wall portion prevents the cutting blade portion from slipping out toward the rear end side in the axial direction.

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

  In this case, the cutting edge is a detachable cutting insert or cutting tip, and the turning tool is a cutting edge exchangeable turning tool such as a cutting edge exchangeable milling cutter. For this reason, when the cutting edge portion reaches the end of its component life, the machining accuracy can be favorably maintained by replacing it with another new cutting edge portion. Further, a plurality of types of cutting blade portions having various cutting blades can be prepared and selectively used in accordance with the type of workpiece and the processing form.

  According to the position adjusting mechanism and the cutting tool of the cutting edge part of one aspect of the present invention, the component life of the adjusting part can be extended.

It is a perspective view of a blade-tip-exchange-type milling cutter (rolling tool) provided with the position adjusting mechanism of the cutting blade part of one embodiment of the present invention. It is a bottom view (front view) of the blade-tip-exchangeable milling cutter of FIG. It is a side view of the blade-tip-exchange-type milling cutter of FIG. It is a longitudinal cross-sectional view of the blade-tip-exchange-type milling cutter of FIG. It is a perspective view which shows an adjustment part. It is a disassembled perspective view which shows an adjustment part. It is (a) top view, (b) side view, and longitudinal cross-sectional view which show an adjustment part. It is the side view which looked at the adjustment part of FIG.7 (b) from VIII direction. It is a top view which shows a cutting blade part.

  DESCRIPTION OF EMBODIMENTS Hereinafter, an edge-exchangeable milling cutter 1 that is an example of a rolling tool according to an embodiment of the present invention, and a position adjustment mechanism 20 of a cutting edge portion provided in the edge-changing milling cutter 1 will be described with reference to the drawings. To do.

[Schematic configuration of the blade tip replaceable milling cutter and cutting blade position adjustment mechanism]
The blade-tip-exchangeable milling cutter 1 of this embodiment is a turning tool (cutting tool) that performs milling on a work material such as a metal material. The blade tip-type milling cutter 1 mainly performs a turning process (cutting process) such as face milling on a work material. Face milling is milling that forms a machining surface perpendicular to the central axis O of the tool body 2 on the work material.

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

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

The cutting blade part 30 has a cutting blade 7. The cutting blade portion 30 attached to the insert mounting seat 4 is arranged such that the cutting blade 7 protrudes further to the tip side and radially outward than the tool body 2.
In the blade-tip-exchangeable milling cutter 1 of this 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 blade 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. This blade-tip exchange milling cutter 1 is a so-called multi-blade type milling cutter.

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

[Definition of direction (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 the axial direction. Of the axial directions, the direction from the attachment portion 5 of the tool body 2 attached to the main spindle of the machine tool toward the insert attachment seat 4 and the cutting blade portion 30 is referred to as the front end side, and from the insert attachment seat 4 and the cutting blade portion 30. A direction toward the attachment portion 5 is referred to as a rear end side.
A direction orthogonal to the central axis O is referred to as a radial direction. Of the radial directions, the direction approaching the central axis O is referred to as the radial inner side, and the direction away from the central axis O is referred to as the radial outer side.
A direction that circulates around the central axis O is referred to as a circumferential direction. Of the circumferential directions, the direction in which the tool body 2 is rotated by the main spindle of the machine tool at the time of cutting is called the tool rotation direction T, and the opposite rotation direction is the direction opposite to the tool rotation direction T (or the opposite direction). (Tool rotation direction).

[Description of tool body 1]
The tool main body 2 includes an outer main body portion 21, an inner main body portion 22, a space portion 23, and a coolant hole 3. The tool body 2 includes a chip pocket 6, an insert mounting seat 4, and a recess 25. The chip pocket 6, the insert mounting seat 4, and the recess portion 25 are disposed in the outer body portion 21.

As shown in FIG. 4, the outer main body portion 21 has a bottomed cylindrical shape. The outer main body 21 has a peripheral wall and a bottom wall. The outer main body 21 is made of steel, for example.
The inner main body 22 is substantially cylindrical. The inner main body portion 22 is disposed inside the outer main body portion 21. That is, the inner body part 22 has a portion located inside the outer body part 21. The inner main body 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 includes 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 attachment portion 5 is a hole that opens to the rear end surface of the cylindrical portion 22a and is recessed from the rear end surface to the front end side. A spindle of a machine tool is inserted into the attachment 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 22 b 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 22 a, a portion adjacent to the front end side of the flange portion 22 b is fitted into the rear end opening of the peripheral wall of the outer body portion 21.
Out of the front end surface of the cylindrical portion 22 a, the outer peripheral end portion and the inner peripheral end portion are in contact with the rear end surface of the bottom wall of the outer main body portion 21 from the rear end side. The cylindrical portion 22a and the bottom wall of the outer main body portion 21 are fastened by the screw member 40 and fixed to each other.

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

The 1st space part 23a is arrange | positioned between the surrounding wall of the outer side main-body part 21, and the outer peripheral surface of the cylindrical part 22a. The first space portion 23a is a cylindrical space centered on the central axis O.
The 2nd space part 23b is arrange | positioned between the bottom wall of the outer side main-body part 21, and the front end surface of the cylindrical part 22a. The second space portion 23b is a circular ring-shaped space centered on the central axis O. The 2nd space part 23b is located between an outer peripheral end part and an inner peripheral end part among the front end surfaces of the cylindrical part 22a. The second space 23 b 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 passes through the tool body 2. A coolant (cutting fluid) supplied through the spindle of the machine tool flows through the coolant hole 3. The coolant hole 3 has the 1st coolant hole 3a, the 2nd coolant hole 3b, and the 2nd space part 23b.

The first coolant hole 3 a passes through the inner main body portion 22. The 1st coolant hole 3a opens to the internal peripheral surface of the attaching part 5, and the front end surface of the cylindrical part 22a. The tip of the first coolant hole 3a is connected to the second space 23b. A plurality of (for example, four) first coolant holes 3a are provided at intervals in the circumferential direction.
The second coolant hole 3 b penetrates the outer body portion 21. The second coolant hole 3b opens in the rear end surface of the bottom wall of the outer body portion 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 (radially outer end portion) of the second coolant hole 3 b opens into the chip pocket 6. The tip of the second coolant hole 3 b opens toward the cutting edge 7 of the cutting edge 30. A plurality of second coolant holes 3b are provided at intervals in the circumferential direction. The number of second coolant holes 3b is the same as the number of chip pockets 6 and the number of cutting edge portions 30 (for example, 20).

A plurality of chip pockets 6 are provided in the outer peripheral portion of the tip of the tool body 2 (outer body portion 21) at intervals in the circumferential direction. The tip pocket 6 is formed to be recessed in the outer periphery of the tip of the tool body 2.
The insert mounting seat 4 is arranged adjacent to the tip pocket 6 in the direction opposite to the tool rotation direction T in the outer peripheral portion of the tip of the tool body 2 (outer body portion 21). In other words, the chip 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 and a description of portions other than those described above of the recessed portion 25 and the tool body 2 will be described later.

(Cutting edge)
As shown in FIG. 9, the cutting edge part 30 is an insert for face milling used for face milling (face milling), for example. As the plurality of cutting blade portions 30 attached to the tool body 2, only one type having the same shape of the cutting blade 7 may be used, or a plurality of types having different shapes of the cutting blade 7 may be used. May be.
The cutting edge portion 30 extends along an intersecting ridge line between the insert main body 31 attached to the insert mounting seat 4 of the tool main body 2, the rake face 32 of the insert main body 31, and the flank face, and is disposed at the outer peripheral portion of the tip end of the insert main body 31 And a cutting edge 7 to be operated.

  The insert body 31 has a polygonal plate shape. In the example of the present embodiment, the insert main body 31 has a rectangular plate shape. When the cutting blade portion 30 is mounted on the insert mounting seat 4, the longitudinal direction of the rectangular surfaces (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 short side direction of the rectangular surface of the insert body 31 is arranged along the radial direction of the tool body 2 (see FIG. 2).

The insert body 31 includes a rectangular plate-shaped base metal part 34 and a triangular plate-shaped blade part 35 that is joined to one corner part of the base metal part 34 to form the cutting blade 7.
The base metal part 34 is made of cemented carbide, for example. 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 higher hardness than the base metal portion 34. However, the present invention is not limited thereto, and the entire insert body 31 including the base metal part 34 and the blade part 35 is made of, for example, a cemented carbide and may be integrally formed by a single member.

  In this embodiment, the blade part 35 is arrange | positioned at one corner part of one polygonal surface (surface) among a pair of polygonal surfaces (rectangular surface) which comprises the surface and back surface of the insert main body 31. The base metal part 34 is joined by brazing or integral sintering. The corner portion is a corner portion located on the outer peripheral portion of the tip of the blade-tip-exchangeable milling cutter 1 when the cutting blade portion 30 is mounted on the insert mounting seat 4.

  On one polygonal surface of the base metal portion 34, a clamp recess 37 that is recessed from the polygonal surface in the thickness direction is formed. In the example of this embodiment, the clamp recessed part 37 makes D shape by the planar view which looked at the cutting blade part 30 from the thickness direction. However, the clamp recessed part 37 is not restricted to D shape by planar view. The depth of the clamp recess 37 increases along the short direction of the insert body 31 from the end opposite to the blade portion 35 toward the blade portion 35 side. That is, the bottom surface of the clamp recess 37 is an inclined surface. When the cutting blade portion 30 is mounted on the insert mounting seat 4, the bottom surface of the clamp recess 37 extends in the direction opposite to the tool rotation direction T as it goes radially outward.

  In one polygonal surface of the base metal part 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 part 35. In the plan view of the cutting blade portion 30 shown in FIG. 9, the rib 38 extends linearly in parallel with the oblique side of the blade portion 35 having a substantially right triangle shape. The rib 38 is disposed so as to face the blade portion 35 from the longitudinal direction and the short direction of the insert body 31. For this reason, when the cutting blade portion 30 is mounted on the insert mounting seat 4, the rib 38 is disposed to face the cutting blade 7 from the rear end side in the axial direction and from the inner side in the radial direction. . Chips generated by the cutting blade 7 cutting the workpiece come into contact with the rib 38.

  As shown in FIG. 2, the thickness of the cutting blade portion 30 increases along the short direction of the insert body 31 from the blade portion 35 toward the end opposite to the blade portion 35. That is, when the cutting blade portion 30 is mounted on the insert mounting seat 4, the thickness of the cutting blade portion 30 increases as it goes radially inward.

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 (positive) angle.
In FIG. 9, the portion of the cutting blade 7 that extends in the short direction of the insert body 31 is a front blade 7 a. The front blade 7a is linear. The front blade 7a is not limited to a linear shape, and may be, for example, a convex curve having a large radius of curvature. The front blade 7 a protrudes from the insert mounting seat 4 toward the distal end side of the tool body 2 when the cutting blade portion 30 is mounted on the insert mounting seat 4.
A portion of the cutting blade 7 that extends in the longitudinal direction of the insert body 31 is an outer peripheral blade 7b. The outer peripheral blade 7b is linear. The outer peripheral blade 7 b protrudes from the insert mounting seat 4 toward the radially outer side of the tool body 2 when the cutting blade portion 30 is mounted on the insert mounting seat 4.
Of the cutting blade 7, the portion located between the front blade 7a and the outer peripheral blade 7b is a corner blade 7c. The corner blade 7c is convex or linear. The corner blade 7 c protrudes from the insert mounting seat 4 toward the outer periphery of the tip of the tool body 2 when the cutting blade portion 30 is mounted on the insert mounting seat 4.

[Description 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 the 3rd wall surface 10 and the clamp screw hole 11 which face a radial direction outer side.

  As shown in FIG. 2, in the example of the present embodiment, the first wall surface 8 has a planar shape extending along a virtual plane (not shown) including the central axis O of the tool body 2, and the third wall surface 10 1 is a flat surface substantially orthogonal to the wall surface 8. Moreover, the 2nd wall surface 9 is extended toward the tool rotation direction T as it goes to a radial direction outer side. For this reason, 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 radially outward.

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 blade portion 30 is inserted into the insert mounting seat 4, the surface (one polygonal surface) facing the thickness direction of the cutting blade portion 30 is in contact with the first wall surface 8. In addition, when the cutting blade portion 30 is fixed with the clamp screw 19 as described later, a slight gap is provided between the surface of the cutting blade portion 30 facing the thickness direction and the first wall surface 8. The back surface (the other polygonal surface) facing the thickness direction of the cutting edge portion 30 is in contact with the second wall surface 9. A side surface of the cutting edge portion 30 facing the short direction is in 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 circumferential width of the insert mounting seat 4 decreases as it goes radially outward, so that the cutting edge portion 30 inserted into the insert mounting seat 4 is inserted into the insert mounting seat. 4 is prevented from moving radially outward. That is, the cutting blade portion 30 is prevented from coming out from the insert mounting seat 4 radially outward.

  The clamp screw hole 11 opens in the outer peripheral surface (chip pocket 6) and the first wall surface 8 of the tool body 2. An internal thread portion is formed on the inner peripheral surface of the clamp screw hole 11. The clamp screw hole 11 extends radially inward as it goes in 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 contacts the bottom surface of the clamp recess 37 of the cutting blade part 30. The cutting blade portion 30 is fixed to the insert mounting seat 4 by screwing the clamp screw 19 into the clamp screw hole 11.

  As shown in FIGS. 1, 3, and 4, the recessed portion 25 is disposed on the outer peripheral surface of the tool main body 2 (outer main body portion 21), and is radial from the outer peripheral surface of the tool main body 2 (intermediate portion 2 b described later). It dents inside. The number of the recessed portions 25 is the same as the number of the cutting blade portions 30 and the number of the insert mounting seats 4. In the example of this embodiment, the number of the recessed portions 25 is 10 or more (for example, 20) on the outer periphery of the tool body 2. Provided.

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

(Retaining wall)
The retaining wall portion 26 is disposed on the outer periphery of the tool body 2 (outer body portion 21). In the example of the present embodiment, the retaining wall portion 26 constitutes a part of the inner wall of the recess portion 25. The retaining wall portion 26 is a wall portion located at the rear end portion of the recessed portion 25 and facing the front end side among the inner walls of the recessed portion 25. A plurality of retaining walls 26 are arranged on the outer periphery of the tool body 2 at intervals in the circumferential direction. The number of retaining walls 26 is the same as the number of recesses 25.

  The retaining wall portion 26 faces the rear end surface of the cutting blade portion 30 (insert 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 blade portion 30 are disposed so as to overlap each other.

(Support part)
The support portion 24 is disposed on the rear end side in the axial direction of the cutting edge portion 30 on the outer periphery of the tool body 2. 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 disposed on the rear end side in the axial direction of the plurality of cutting blade portions 30 on the outer periphery of the tool body 2. The number of support portions 24 is the same as the number of cutting blade portions 30, and in the example of the present embodiment, 10 or more (for example, 20) support portions 24 are provided on the outer periphery of the tool body 2. The support portion 24 is disposed at the rear end portion of the outer peripheral surface of the peripheral wall of the outer main body portion 21. The support part 24 is positioned on the rear end side in the axial direction of the adjustment part 50 mounted on the outer periphery of the tool body 2 and supports the adjustment part 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 protrudes radially outward from a portion (a portion facing in the circumferential direction) 2 a adjacent to the support portion 24 in the circumferential direction on the outer peripheral surface of the tool body 2. In addition, the said part 2a may be paraphrased as the part 2a between the support parts 24 adjacent to the circumferential direction among the outer peripheral surfaces of the tool main body 2. FIG.
The support portion 24 projects outward in the radial direction from a portion (intermediate portion 2b described later) adjacent to the distal end side of the support portion 24 in the outer peripheral surface of the tool body 2.

  The support portion 24 has a rib shape extending in the axial direction. The support portion 24 includes a pair of ribs that extend in the axial direction and are spaced apart from each other in the circumferential direction. The support part 24 has the 2nd plane part 24b in the surface which faces the circumferential direction of a rib. The second plane portion 24b has a planar shape that extends in a direction substantially perpendicular to the circumferential direction. The second flat surface portion 24b is in contact with a first flat surface portion 53a described later of the adjusting portion 50. The support part 24 has a pair of second plane parts 24b arranged to face each other with a space therebetween. In the example of the present embodiment, the pair of second flat portions 24b are arranged to face each other in the circumferential direction. A pair of 2nd plane parts 24b are arrange | positioned in the surface which mutually opposes in the circumferential direction in a pair of rib. The front end surface of the support portion 24 (a pair of ribs thereof) has a flat 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 to overlap each other. When the adjustment part 50 is attached to the outer periphery of the tool body 2, the support part 24, the adjustment part 50, the recess part 25, the insert attachment seat 4, and the cutting edge part 30 are mutually viewed from the axial direction. Arranged overlapping.

[Adjustment section]
The adjustment part 50 is arrange | positioned at the outer periphery of the tool main body 2 (outer body part 21). The blade tip-type milling cutter 1 includes at least one adjusting unit 50. The adjustment unit 50 is supported by the support unit 24. The adjustment unit 50 presses the cutting blade part 30 toward the distal end side in the axial direction, and adjusts the position of the cutting blade part 30 in the axial direction. The adjustment unit 50 adjusts the position of the cutting blade 7 in the axial direction by adjusting the position of the cutting blade 30 in the axial direction with respect to the tool body 2.

  The adjustment unit 50 is detachable from the support unit 24 in a direction crossing the central axis O or a circumferential direction around the central axis O. In the example of the present embodiment, the adjustment unit 50 is detachable in the radial direction perpendicular to the central axis O with respect to the support unit 24. And in the state where adjustment part 50 was removed from a tool (support part 24), cutting edge exchange type milling cutter 1 cuts a work material.

As shown in FIGS. 3 to 8, the adjustment unit 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 contacts the cutting blade portion 30. Specifically, the shaft member 51 is supported from both sides in the circumferential direction by the support portion 24 and is supported from the rear end side in the axial direction.
A 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 includes a detent shaft 53 positioned at the rear end of the shaft member 51, a screw shaft 54 positioned at the tip, and a thrust positioned between the detent shaft 53 and the screw shaft 54 along the axial direction. Receiving portion 55.

  The detent shaft 53 has a first flat portion 53 a on the outer peripheral surface of the detent shaft 53. That is, the shaft member 51 has the first flat surface portion 53 a on the outer peripheral surface of the shaft member 51. The 1st plane part 53a is planar shape extended in an axial direction. The detent shaft 53 has a pair of first flat portions 53 a that are 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 flat portions 53 a that are arranged back to back on the outer peripheral surface of the shaft member 51. The pair of first planar portions 53a face opposite sides in the direction orthogonal to the center line C. The pair of first plane portions 53a are disposed so as to face each other in a direction orthogonal to the center line C.

The pair of first flat portions 53a of the shaft member 51 and the pair of second flat portions 24b of the support portion 24 are in contact with each other. For this reason, the detent shaft 53 is clamped in a 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 prevention 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 has a cylindrical 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 part 55 contacts the support part 24 from the front end side in the axial direction. The rear end surface of the thrust receiving portion 55 comes into contact with the front end surfaces of the pair of ribs of the support portion 24 from the front 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 55 a that contacts the outer peripheral surface of the tool body 2 on the outer peripheral surface of the thrust receiving portion 55. In the example of this embodiment, the chamfered portion 55a has a planar shape extending in the axial direction. The chamfered portion 55 a contacts an intermediate portion 2 b described later on the outer peripheral surface of the tool body 2. The thrust receiving portion 55 is supported on the outer peripheral surface of the tool body 2 from the radially inner side.

  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 screw portion on the inner peripheral surface of the nut member 52. The nut member 52 is screwed onto the screw shaft 54.

A nut operation hole 52 a is opened on the outer peripheral surface of the nut member 52. A plurality of nut operation holes 52a are provided on the outer peripheral surface of the nut member 52 at intervals around the center line C (for example, four at equal intervals). 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 52 a is a through hole that penetrates the nut member 52 in a 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 radially outer end of the nut member 52 is radially inward of the radial position of the radially outer end (outer peripheral blade 7 b) of the cutting edge portion 30. .

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

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

  When viewed from the radial direction, the intermediate portion 2b and the adjusting portion 50 are disposed so as to overlap each other. The intermediate portion 2 b has a portion adjacent to the adjustment portion 50 in the circumferential direction on the outer peripheral surface of the tool body 2. Specifically, the intermediate portion 2 b 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 adjustment portion 50 in the circumferential direction, and this portion is a part of the intermediate portion 2b.

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

The radial position of the intermediate portion 2b is on the inner side in the radial direction than the radial position of the adjusting portion 50. In other words, the adjustment unit 50 is disposed so as to protrude radially outward from the intermediate portion 2 b 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 on the inner side in the radial direction than the radial position of the center line C of the adjustment unit 50.
In the example of the present embodiment, the radial position of the intermediate portion 2b is radially outer than 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. It is.

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

  Then, with the adjustment unit 50 removed from the tool body 2, it is possible to perform a rolling process (cutting process). Therefore, a large centrifugal force does not act on the adjusting unit 50, and the component life of the adjusting unit 50 can be extended. Moreover, since the adjustment part 50 becomes difficult to break, durability as the blade-tip-exchangeable milling cutter 1 as a whole is improved and the tool life is extended.

Further, in the blade-tip-exchangeable milling cutter, a plurality of cutting blade portions are provided in the circumferential direction on the outer peripheral portion of the tip of the tool body, and in the conventional structure, the same number of cutting blade portions as the outer periphery of the tool body Only the adjustment part had to be provided.
On the other hand, according to the blade-exchangeable milling cutter 1 of the present embodiment, the adjustment unit 50 can be removed from the tool, so that it is not necessary to prepare the same number of adjustment units 50 as the plurality of cutting blade units 30. For example, the position adjustment operation in the axial direction of all the cutting edge portions 30 can be sequentially performed by one adjustment unit 50. Therefore, the cost of the tool can be reduced. Moreover, since the cutting can be performed with the adjustment unit 50 removed from the blade-tip-exchangeable milling cutter 1, the tool can be reduced in weight.

In the present embodiment, the adjustment unit 50 is detachable in the radial direction perpendicular to the central axis O with respect to the support unit 24.
For this reason, the structure of the position adjusting mechanism 20 of the cutting edge can be simplified, and the work of attaching / detaching the adjusting unit 50 to / from the support unit 24 becomes easier.

Moreover, in this embodiment, the position of the axial direction of the cutting blade part 30 is adjusted by adjusting the screwing amount of the nut member 52 with respect to the shaft member 51.
For this reason, the position adjustment of the cutting blade part 30 in the axial direction can be easily performed.

  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 plane portion 53a of the shaft member 51 and the second plane portion 24b of the support portion 24 come into contact with each other. This can be suppressed. That is, in the state where the shaft member 51 is prevented from rotating, the screwing amount of the nut member 52 with respect to the shaft member 51 can be adjusted, and the adjustment work becomes easy.

Moreover, in this embodiment, a pair of 1st plane part 53a and a pair of 2nd plane part 24b contact, respectively.
In this case, since the pair of first plane portions 53a are sandwiched between the pair of second plane portions 24b, rotation around the center line C of the shaft member 51 relative to the support portion 24 is further suppressed. Therefore, the position adjustment operation of the cutting blade part 30 in the axial direction by the adjusting part 50 becomes easier.

In the present embodiment, the thrust receiving portion 55 of the shaft member 51 contacts the support portion 24 from the front end side in the axial direction.
For this reason, 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 adjustment part 50 can ensure large pressing force which presses the cutting-blade part 30 toward the front end side of an axial direction. Therefore, it is easier to adjust the position of the cutting edge portion 30 in the axial direction.

  In this embodiment, since the chamfered portion 55 a is provided on the outer peripheral surface of the thrust receiving portion 55, it is possible to ensure a large outer diameter of the thrust receiving portion 55 while arranging the shaft member 51 close to the outer peripheral surface of the tool body 2. Thereby, 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 blade portion 30. Can do.

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 blade portion 30 with a gap from the rear end side in the axial direction.
For this reason, even if cutting is performed in a state where the adjusting portion 50 is removed from the tool, the retaining wall portion 26 prevents the cutting blade portion 30 from coming out to the rear end side in the axial direction.

Moreover, in this embodiment, the cutting blade part 30 is attached to the front-end | tip outer peripheral part (insert mounting seat 4) of the tool main body 2 so that attachment or detachment is possible.
That is, the cutting edge part 30 is a detachable cutting insert or cutting tip. For this reason, when the cutting edge part 30 reaches the part life, the machining accuracy can be maintained well by replacing it with another new cutting edge part 30. Further, a plurality of types of cutting blade portions 30 having various cutting blades 7 can be prepared and selectively used according to the type of material to be cut and the processing form.

  Further, in the present embodiment, the radial position of the intermediate portion 2 b in the outer peripheral surface of the tool body 2 is arranged on the inner side in the radial direction than the radial position of the adjustment unit 50. For this reason, when adjusting the position of the cutting blade part 30 in the axial direction by operating the adjustment part 50, the intermediate part 2b of the outer peripheral surface of the tool body 2 is unlikely to obstruct the adjustment work. That is, it can suppress that work tools, such as a wrench used when operating the adjustment part 50, contact the intermediate part 2b. Therefore, the workability of the position adjustment of the cutting edge part 30 is improved.

  Further, since the radial position of the intermediate portion 2b in the outer peripheral surface of the tool body 2 is radially inward from the radial position of the adjustment unit 50, excess meat from the outer peripheral surface of the tool body 2, that is, the tool Metal parts that are not necessary for securing rigidity can be reduced, and the weight of the tool can be reduced.

Further, in the present embodiment, the radial position of the intermediate portion 2 b in the outer peripheral surface of the tool body 2 is radially inward from the radial position of the center line C of the adjustment unit 50.
For this reason, it can suppress more that work tools, such as a wrench which operates the adjustment part 50, contact the intermediate part 2b, and the workability | operativity of the position adjustment of the cutting blade part 30 improves. Moreover, in the intermediate part 2b of the outer peripheral surface of the tool main body 2, excess meat can be reduced more and a tool can be reduced in weight.

  Moreover, in this embodiment, the support part 24 protrudes toward the radial direction outer side rather than the part 2a adjacent to the support part 24 in the circumferential direction among the outer peripheral surfaces of the tool main body 2. FIG. That is, the radial position of the portion 2 a is arranged on the inner side in the radial direction than the radial position of the support portion 24. Thereby, excess meat near the support portion 24 on the outer peripheral surface of the tool body 2 can be reduced, and the tool can be further reduced in weight.

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.
For this reason, among the tool main bodies 2, the outer main body portion 21 that requires high rigidity is made of, for example, steel, which is easy to ensure rigidity, and the inner main body portion 22 is made of light weight, for example, aluminum, and the tool main body. The total weight of 2 can be reduced. That is, for example, unlike 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 tool can be reduced in weight while ensuring the rigidity of the tool.

Moreover, in this embodiment, since the space part 23 is provided between the outer side main-body part 21 and the inner side main-body part 22, the tool main body 2 can be thinned and weight can be reduced and a tool can be reduced in weight.
In the present embodiment, a part of the space portion 23 (second space portion 23b) is used as a flow path portion of the coolant hole 3. For this reason, the coolant can be temporarily stored in a part of the space portion 23, the amount of coolant jetted to the cutting edge portion 30 can be stabilized, or the coolant between the plurality of coolant holes 3 (second coolant holes 3 b) can be stabilized. It is easy to equalize the jetting balance.

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

In the above-described embodiment, the example in which the pair of second flat surface portions 24b of the support portion 24 are disposed to face each other in the circumferential direction has been described, but the present invention is not limited thereto. For example, the pair of second flat portions 24b may be arranged to face each other in the radial direction. In this case, the adjustment unit 50 is detachable from the support unit 24 in the circumferential direction around the central axis O.
Further, the first flat portion 53a of the shaft member 51 is not limited to a pair, and may be only one. Even in this case, the rotation prevention shaft 53 is sandwiched between the pair of ribs of the support portion 24, so that the rotation prevention function is obtained.

In the above-described embodiment, the example in which the nut operation hole 52a is opened on the outer peripheral surface of the nut member 52 has been described. 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. 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.
Moreover, the adjustment part 50 should just be able to press the cutting blade part 30 toward the front end side of an axial direction, and can adjust the position of the axial direction of the cutting blade part 30, and is the structure which has the shaft member 51 and the nut member 52. It is not limited to.

  In the above-described embodiment, the example in which the retaining wall portion 26 is disposed in each of the plurality of recess portions 25 has been described, but the present invention is not limited thereto. For example, only one retaining wall portion 26 extending over the entire circumference in the circumferential direction may be provided on the outer peripheral surface of the tool body 2.

  In the above-described embodiment, the example in which the cutting blade portion 30 is detachably attached to the outer peripheral portion of the tip of the tool main body 2 has been described. The cutting edge part 30 should just be attached to the tool main body 2 so that position adjustment is possible to an axial direction, and may be attached to the front-end | tip outer peripheral part of the tool main body 2 so that removal is impossible. In other words, the cutting tool is not limited to the blade exchange type milling cutter 1.

  In addition, in the range which does not deviate from the meaning of this invention, you may combine each structure (component) demonstrated by the above-mentioned embodiment, a modification, and a note, etc., addition of a structure, omission, substitution, others It can be changed. Further, the present invention is not limited by the above-described embodiments, but is limited only by the scope of the claims.

1 ... Cutting edge milling cutter (rolling tool)
DESCRIPTION OF SYMBOLS 2 ... Tool body 20 ... Position adjustment mechanism of cutting blade part 24 ... Support part 24b ... 2nd plane part 26 ... Retaining wall part 30 ... Cutting blade part 50 ... Adjustment part 51 ... Shaft member 52 ... Nut member 53a ... 1st Flat part 55 ... Thrust receiving part 55a ... Chamfered part O ... Center axis

Claims (10)

A cutting edge portion arranged on the outer periphery of the tip of the tool body rotated around the central axis;
A support part disposed on the rear end side in the axial direction of the cutting edge part on the outer periphery of the tool body;
An adjustment unit that is supported by the support unit and presses the cutting blade part toward the distal end side in the axial direction to adjust the axial position of the cutting blade part;
The position adjustment mechanism of the cutting blade part, wherein the adjustment part is detachable from the support part in a direction intersecting the central axis or in a circumferential direction around the central axis. A position adjusting mechanism for a cutting edge part according to claim 1,
The adjusting part is a position adjusting mechanism for the cutting edge part, which is detachable from the support part in a radial direction perpendicular to the central axis. A position adjusting mechanism for a cutting edge part according to claim 1 or 2,
The adjustment unit is
A shaft member supported by the support part;
A nut member screwed onto the shaft member and in contact with the cutting blade portion;
A position adjusting mechanism for the cutting blade portion, wherein the axial position of the cutting blade portion is adjusted by adjusting the screwing amount of the nut member relative to the shaft member. It is a position adjustment mechanism of the cutting blade part according to claim 3,
The shaft member has a first flat surface portion on an outer peripheral surface of the shaft member,
The said support part is a position adjustment mechanism of a cutting blade part which has a 2nd plane part which contacts the said 1st plane part. It is a position adjustment mechanism of the cutting blade part according to claim 4,
The shaft member has a pair of first flat portions arranged back to back on the outer peripheral surface of the shaft member,
The support part has a pair of second plane parts arranged to face each other with a space therebetween,
A position adjusting mechanism for a cutting edge part, wherein the pair of first plane parts and the pair of second plane parts contact each other. It is a position adjustment mechanism of the cutting blade part as described in any one of Claims 3-5,
The shaft member is a position adjustment 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. A position adjusting mechanism for a cutting edge part according to claim 6,
The thrust receiving portion is a cylindrical shape extending in the axial direction,
The thrust receiving portion has a cutting edge portion position adjustment mechanism 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. It is a position adjustment mechanism of the cutting blade part according to any one of claims 1 to 7,
A position adjusting mechanism for a cutting edge part, comprising a retaining wall part disposed on the outer periphery of the tool body and facing the rear end surface of the cutting edge part with a gap from the rear end side in the axial direction. It is a position adjustment mechanism of the cutting blade part as described in any one of Claims 1-8,
The cutting blade portion is a position adjustment mechanism for the cutting blade portion, which is detachably mounted on the outer peripheral portion of the tip of the tool body. A tool body that can be rotated about a central axis;
A plurality of cutting blade portions disposed at intervals in the circumferential direction on the outer peripheral portion of the tip of the tool body;
A plurality of support portions respectively arranged on the rear end side in the axial direction of the plurality of cutting blade portions on the outer periphery of the tool body;
And at least one adjusting part that is supported by the support part and presses the cutting edge part toward the distal end side in the axial direction to adjust the axial position of the cutting edge part,
The said adjustment part is a turning tool which is removable with respect to the said support part in the direction which cross | intersects the said central axis, or the circumferential direction around the said central axis.

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