JP7102283B2 - Manufacturing method for holders, cutting tools and cutting products - Google Patents

Description

This aspect relates to a method for manufacturing a holder, a cutting tool and a machined product, and more specifically, to a method for manufacturing a holder, a cutting tool and a machined product having two members.

As a holder for a cutting tool used when cutting a work material, for example, the holder described in Patent Document 1 is known. The holder in the cutting tool described in Patent Document 1 is a holder composed of two members, a first component and a second component.

Special Table 2016-516600

When the holder is composed of a plurality of members, it is required to improve the stability of the connection between these members.

The holder in the present disclosure has a rod shape extending from the first end to the second end along the central axis, and has a first member located on the side of the first end and the second member of the first member. It has a second member located on the end side. The first member is a first end surface located between the first end surface located on the side of the first end, a second end surface located on the side of the second end, and the first end surface and the second end surface. It has an upper surface and a pocket located on the side of the first end surface and open on the first end surface and the first upper surface. The second member has a third end surface located on the side of the first end surface and facing the second end surface, and a second upper surface located next to the third end surface. .. When the virtual plane orthogonal to the central axis is used as a reference plane, the third end surface is located closer to the convex portion protruding toward the first end and the second upper surface than the convex portion. It has an inclined surface that is inclined with respect to the reference surface. The second end surface has a concave portion into which the convex portion is inserted, and a first region located closer to the first upper surface surface than the concave portion and in contact with the inclined surface. ..

The holder of the present disclosure has high holding stability.

It is a perspective view which shows the holder of an embodiment. FIG. 5 is a plan view of the first upper surface and the second upper surface of the holder shown in FIG. 1 as viewed from the front. It is a perspective view which disassembled the holder shown in FIG. 1 into a 1st member and a 2nd member. It is a perspective view which looked at the holder shown in FIG. 1 from another direction. It is a perspective view which disassembled the holder shown in FIG. 4 into a 1st member and a 2nd member. It is a side view which looked at the holder shown in FIG. 2 from the A6 direction. It is an enlarged view which shows the region B7 in FIG. FIG. 5 is a side view of the first member in FIG. 5 as viewed from the A8 direction. FIG. 5 is a side view of the holder shown in FIG. 2 as viewed from the A9 direction. It is sectional drawing which shows the xx cross section in FIG. FIG. 5 is a side view of the second member in FIG. 5 as viewed from the A11 direction. It is an enlarged view which shows the region B12 in FIG. It is a front view which looked at the holder shown in FIG. 11 from the A13 direction. It is a perspective view which shows the cutting tool of an embodiment. FIG. 14 is a plan view of the first upper surface and the second upper surface of the cutting tool shown in FIG. 14 as viewed from the front. It is a perspective view which disassembled a part of the cutting tool shown in FIG. It is a side view which inserted the 1st screw into a part of the cutting tool shown in FIG. FIG. 15 is a cross-sectional view showing a cross section of xviii-xviii in FIG. It is a figure which showed one process in the manufacturing method of the cut-worked article of embodiment. It is a figure which showed one process in the manufacturing method of the cut-worked article of embodiment. It is a figure which showed one process in the manufacturing method of the cut-worked article of embodiment.

<Holder>
Hereinafter, each holder 1 of the embodiment will be described in detail with reference to the drawings. However, for convenience of explanation, each figure referred to below is a simplified representation of only the main members necessary for explaining each embodiment. Therefore, the holder 1 of the present disclosure may include any component not shown in each of the referenced figures. Further, the dimensions of the members in each drawing do not faithfully represent the actual dimensions of the constituent members, the dimensional ratio of each member, and the like.

As shown in FIG. 1, the holder 1 of the present disclosure has a rod shape extending from the first end 1a to the second end 1b along the central axis X. Hereinafter, the first end 1a may be referred to as a front end 1a, and the second end 1b may be referred to as a rear end 1b. The holder 1 has a first member 3 located on the side of the tip 1a and a second member 5 located on the rear end 1b side of the first member 3.

As shown in FIGS. 1 and 4, the first member 3 includes a first end surface 7 located on the side of the tip 1a, a second end surface 9 located on the side of the rear end 1b, and a first end surface 7 and a second. It has a first upper surface 11 located between the end faces 9. Further, the first member 3 has a pocket 13 which is located on the side of the tip 1a and is open in the first end surface 7 and the first upper surface 11.

As shown in FIGS. 3 and 5, the second member 5 is located on the side of the tip 1a and is located next to the third end surface 15 facing the second end surface 9 and the third end surface 15. It has two upper surfaces 17 and.

As shown in FIG. 3, the third end surface 15 has a convex portion 19 protruding toward the tip 1a. Further, as shown in FIG. 12, the third end surface 15 is located closer to the second upper surface 17 than the convex portion 19 when the virtual plane orthogonal to the central axis X is the reference surface S, and is a reference. It has an inclined surface 21 that is inclined with respect to the surface S.

As shown in FIGS. 4 and 5, the second end surface 9 has a recess 23 into which the convex portion 19 is inserted. Further, as shown in FIGS. 5 to 7, the second end surface 9 is located closer to the first upper surface 11 than the recess 23, and has a first region 25 that is in contact with the inclined surface 21. There is.

Since the first member 3 and the second member 5 have the above-described configuration, the holder 1 in the present disclosure has high holding stability. For example, when a force is applied to the holder 1 from above to below during cutting, at least a part of the inclined surface 21 and at least a part of the first region 25 are likely to come into contact with each other. Therefore, the first member 3 and the second member 5 are likely to be stably held in the contacted portion.

Further, since the third end surface 15 has an inclined surface 21 closer to the second upper surface 17 than the convex portion 19, the first region 25 is formed on the inclined surface 21 which is closer to the cutting region than the convex portion 19. Easy to hold. Therefore, a load is unlikely to occur on the convex portion 19. Therefore, the holder 1 in the present disclosure has high durability.

In the holder 1 shown in FIG. 3, the inclined surface 21 may have a flat surface shape at least in part. When the inclined surface 21 has the above configuration, the first member 3 and the second member 5 are more likely to be held more stably.

As shown in FIGS. 5 to 8, the second end surface 9 is located closer to the first upper surface 11 than the first region 25, and has a second region 27 parallel to the reference surface S. You may. Since it has the above configuration, the first member 3 and the second member 5 are likely to be stably held when a force is applied in the direction from the front end 1a to the rear end 1b during cutting.

Further, the second end surface 9 may be located farther from the first upper surface 11 than the first region 25, and may further have a third region 29 parallel to the reference surface. Since it has the above configuration, the first member 3 and the second member 5 are likely to be stably held when a force is applied in the direction from the front end 1a to the rear end 1b during cutting.

Further, the opening 37 of the recess 23 may be located in the third region 29. Further, the area of the third region 29 may be larger than that of the second region 27.

Since the second end surface 9 has the above configuration, the convex portion 19 has high durability. Since the third region 29 has a larger area than the second region 27, the area of the opening 37 of the recess 23 is made larger than that when the opening 37 of the recess 23 is located in the second region 27. easy. Therefore, it is easy to increase the diameter of the convex portion 19 inserted into the concave portion 23. Therefore, the convex portion 19 in the present disclosure has high durability. The area of the third region 29 refers to an area including the area of the opening 37 of the recess 23.

As shown in FIGS. 6 and 7, the second region 27 may be located closer to the rear end 1b than the third region 29. In other words, the third region 29 may be located closer to the tip 1a than the second region 27.

As shown in FIGS. 6 and 7, the end of the first region 25 on the side of the second region 27 is located closer to the rear end 1b than the end of the first region 25 on the side of the third region 29. You may be. For example, the first region 25 may be inclined so as to approach the tip 1a from the end on the side of the second region 27 toward the end on the side of the third region 29.

As shown in FIG. 7, in the side view, the first region 25 may be connected to the second region 27 and may have a first portion 55 inclined with respect to the reference plane S. Further, the first region 25 may be connected to the first portion 55 and may have a flat second portion 57 along the central axis X. Further, the first region 25 may have a third portion 59 which is connected to the second portion 57 and is inclined with respect to the reference plane S. The third part 59 may be connected to the third area 29.

As shown in FIG. 7, the first region 25 may have a flat surface shape inclined with respect to the reference surface S. For example, the first part 55 may have a flat surface shape. When the first portion 55 has a flat surface shape, the first region 25 easily comes into surface contact with the inclined surface 21. Therefore, at the time of cutting, when a force is applied in the direction along the reference surface S and in the direction away from the first upper surface 11 or the second upper surface 17, the first member 3 and the second member 5 are moved. Be strongly restrained. Therefore, the holder 1 in the present disclosure has an effect that the first member 3 and the second member 5 are easily held stably.

As shown in FIG. 7, the first region 25 may have a convex shape. In other words, the first part 55 may have a convex shape. When the first region 25 has a convex shape, the first region 25 easily makes line contact with the inclined surface 21. Therefore, the first member 3 and the second member 5 are likely to be stably held.

As shown in FIG. 7, the first region 25 may have a convex curved surface shape. In other words, the first portion 55 may have a convex curved surface shape. When the first region 25 has a convex curved surface shape, the strength of the portion in line contact with the inclined surface 21 in the first region 25 is high. Therefore, since the first region 25 has high durability, the holder 1 in the present disclosure has high holding stability even when the first member 3 and the second member 5 are repeatedly attached and detached.

As shown in FIG. 3, the third end surface 15 may have a fourth region 31 having a convex portion 19. Further, the third end surface 15 may have a fifth region 33 located closer to the second upper surface 17 than the fourth region 31. The fifth region 33 may be located closer to the second upper surface 17 than the inclined surface 21. That is, the third end surface 15 may have a fifth region 33, an inclined surface 21, and a fourth region 31 in order from the side closer to the second upper surface 17.

As shown in FIGS. 6 and 7, the fourth region 31 may be located farther from the rear end 1b than the fifth region 33. In other words, the fifth region 33 may be located closer to the rear end 1b than the fourth region 31.

As shown in FIGS. 6 and 7, the end of the inclined surface 21 on the side of the fifth region 33 is located closer to the rear end 1b than the end of the inclined surface 21 on the side of the fourth region 31. May be good. For example, the inclined surface 21 may be inclined so as to approach the rear end 1b from the end on the side of the fourth region 31 toward the end on the side of the fifth region 33.

Since it has the above configuration, when a force is applied in the direction along the reference surface S and away from the first upper surface 11 or the second upper surface 17 during cutting, the inclined surface 21 can easily receive the first region 25 in a stable manner. Therefore, the holder 1 in the present disclosure has high holding stability.

As shown in FIG. 10, the first member 3 extends from the recess 23 in a direction away from the first upper surface 11, even if it further has a first screw hole 41 that is open on the outer surface. good. The outer surface means a surface located outside the first member 3.

The first screw 43 may be passed through the first screw hole 41 from the outer surface, and the first screw 43 may be brought into contact with the convex portion 19. Since the first screw 43 comes into contact with the convex portion 19, the first member 3 and the second member 5 are easily held stably. Therefore, the holder 1 in the present disclosure has high holding stability.

As shown in FIG. 8, the first member 3 may further have a first lower surface 35 located on the opposite side of the first upper surface 11. Further, the opening 37 of the recess 23 may be located closer to the boundary between the third region 29 and the first region 25 than the boundary between the third region 29 and the first lower surface 35.

Specifically, as shown in FIG. 8, the distance from the boundary between the third region 29 and the first region 25 to the opening 37 is set to W1, and the distance from the boundary between the third region 29 and the first lower surface 35 to the opening 37. Assuming that the distance is W2, W2 may be larger than W1.

When the first member 3 has the above configuration, the first member 3 is first from the recess 23 toward the first lower surface 35.
When the screw hole 41 is extended, it is easy to increase the length of the first screw hole 41. Therefore, the binding force between the first screw 43 and the first screw hole 41 tends to increase.

As shown in FIGS. 11 and 12, the convex portion 19 may have a first portion 39 which is rod-shaped and whose outer diameter decreases toward the rear end 1b side. ..

When the convex portion 19 has the above configuration, when the first screw 43 comes into contact with the first portion 39, the first portion 39 to the first screw 43 are from the side of the tip 1a to the rear end 1b. Force is easily applied in the direction toward the side. This is because, as the first screw 43 is tightened into the first screw hole 41, the first screw 43 moves from the front end 1a to the rear end 1b along the first portion 39. Along with this movement, the first member 3 is easily pressed against the second member 5. Therefore, the first member 3 and the second member 5 are easily held stably. Therefore, the holder 1 in the present disclosure has high holding stability.

As shown in FIGS. 11 and 12, the convex portion 19 may have a second portion 45 located closer to the tip 1a than the first portion 39. Further, even if the convex portion 19 has a third portion 47 which is located closer to the rear end 1b than the first portion 39 and whose outer diameter increases toward the rear end 1b side. good. Further, the convex portion 19 may have a fourth portion 49 located closer to the rear end 1b than the third portion 47. Here, the outer diameter of the second portion 45 may be the same as the outer diameter of the fourth portion 49.

When the convex portion 19 has the above configuration, the contact area between the convex portion 19 and the concave portion 23 tends to be large. Therefore, the first member 3 and the second member 5 are easily held stably. This is because when the outer diameter of the second portion and the outer diameter of the fourth portion are the same, both the second portion and the fourth portion are likely to come into contact with the recess. Therefore, the holder 1 in the present disclosure has high holding stability.

As shown in FIG. 10, when the plane is viewed from the side of the first end surface 7, the angle formed by the virtual extension line of the central axis of the first screw hole 41 and the first upper surface 11 may be 45 degrees or less.

When having the above structure, the holding stability with respect to the feed component force at the time of cutting is improved.

Further, the angle formed by the virtual extension line of the central axis of the first screw hole 41 and the first upper surface 11 may be larger than 45 degrees and 90 degrees or less.

With the above configuration, the holding stability with respect to the main component force applied to the billion along the reference plane S is improved.

The angle formed by the virtual extension line of the central axis of the first screw hole 41 and the first upper surface 11 may be approximately 70 degrees.

As shown in FIGS. 4 and 10, the first member 3 has a first side surface 51 located between the first lower surface 35 located on the opposite side of the first upper surface 11 and the first upper surface 11 and the first lower surface 35. May have. Further, the first member 3 may further have a first connecting surface 53 located between the first lower surface 35 and the first side surface 51 and connected to the first lower surface 35 and the first side surface 51. .. At this time, the first screw 41 may be opened in the first lower surface 35 and the first connection surface 53.

With the above configuration, when the operator inserts the first screw 43 into the first screw hole 41, it is easy to find the position of the first screw hole 41.

As shown in FIG. 10, the virtual extension line of the central axis of the first screw hole 41 may intersect the center P of the convex portion 19 when viewed from the side of the first end surface 7 in a plane.

When the first screw hole 41 and the convex portion 19 have the above configuration, the first screw 43 and the convex portion 19 are unlikely to be misaligned. Therefore, the first member 3 and the second member 5 are easily held stably. Therefore, the holder 1 in the present disclosure has high holding stability.

The sizes of the first member 3 and the second member 5 are not particularly limited. For example, the length from the tip 1a to the second end surface 9 may be about 10 to 100 mm. Further, the length from the first upper surface 11 to the first lower surface 35 may be about 5 to 50 mm. Further, the length from the fourth region 31 to the rear end 1b may be about 50 to 200 mm. Further, the length from the second upper surface 17 to the surface opposite to the second upper surface 17 may be about 5 to 50 mm.

As the material of the holder 1, for example, steel, cast iron, cemented carbide, or the like can be used. From the viewpoint of increasing the toughness of the holder 1, steel may be used among these materials.

The second member 5 may have a higher hardness than the first member 3. For example, when the first member 3 is steel and the second member 5 is a cemented carbide, chattering during cutting is unlikely to occur.

Further, since the hardness of the second member 5 is higher than that of the first member 3, the second member 5 is less likely to be worn than the first member 3. Therefore, the second member 5 has high wear resistance.

<Cutting tool>
Next, the cutting tool of the embodiment of the present disclosure will be described with reference to the drawings.

As shown in FIGS. 14 and 15, the cutting tool 101 of the present disclosure has a rod shape extending from the front end 1a to the rear end 1b. The cutting tool 101 includes a holder 1 and a cutting insert 103 located in a pocket 13 of the holder 1. The cutting insert 103 has a through hole 105.

The cutting tool 101 in the example shown in FIGS. 14 and 15 includes a second screw 109 that can be used to fix the cutting insert 103 to the pocket 13. As shown in FIG. 18, the pocket 13 may have a second screw hole 111 extending from the side of the first upper surface 11 toward the side of the first lower surface 35. By inserting the second screw 109 into the through hole 105 in the cutting insert 103 and the second screw hole 111 in the pocket 13, the cutting insert 103 can be fixed in the pocket 13.

Examples of the cutting insert 103 include cemented carbide and cermet. Examples of the composition of the cemented carbide include WC-Co, WC-TiC-Co and WC-TiC-TaC-Co. WC-Co is produced by adding cobalt (Co) powder to tungsten carbide (WC) and sintering it. WC-TiC-Co is WC-Co with titanium carbide (TiC) added. WC-TiC-TaC-Co is WC-TiC-Co with tantalum carbide (TaC) added.

Cermet is a sintered composite material in which a metal is composited with a ceramic component. Specifically, examples of the cermet include members containing a titanium compound such as titanium carbide (TiC) and titanium nitride (TiN) as a main component.

The surface of the cutting insert 103 may be coated with a coating using a chemical vapor deposition (CVD) method or a physical vapor deposition (PVD) method. The composition of the coating is titanium carbide (TiC).
, Titanium Nitride (TiN), Titanium Carbonitride (TiCN), Aluminium (Al ₂ O ₃ ) and the like.

<Manufacturing method of machined products>
Next, a method for manufacturing a machined product according to the embodiment of the present disclosure will be described with reference to the drawings.

The work piece is made by cutting the work material. The method for manufacturing a machined product in the present disclosure includes the following steps. That is,
(1) The process of rotating the work material 201 and
(2) A process of bringing the cutting tool 101 into contact with the rotating work material 201, and
(3) A process of separating the cutting tool 101 from the work material 201,
It has.

More specifically, first, as shown in FIG. 19, the work material 201 is rotated around the axis O1 in the rotation direction Y, and the cutting tool 101 is relatively close to the work material 201. Next, as shown in FIG. 20, the cutting edge 107 of the cutting tool 101 is brought into contact with the rotating work material 201 to cut the work material 201. Then, as shown in FIG. 21, the cutting tool 101 is relatively far from the work material 201.

In the embodiment, the cutting tool 101 is moved in the X1 direction in a state where the shaft O1 is fixed and the work material 201 is rotated to bring the cutting tool 101 closer to the work material 201. Further, in FIG. 20, the work material 201 is cut by bringing the cutting edge 107 of the insert into contact with the rotating work material 201. Further, in FIG. 21, the cutting tool 101 is moved away in the X2 direction while the work material 201 is rotated.

In the cutting process in the manufacturing method of the embodiment, in each step, the cutting tool 101 is moved to bring the cutting tool 101 into contact with the work material 201, or the cutting tool 101 is separated from the work material 201. However, of course, it is not limited to such a form.

For example, in the step (1), the work material 201 may be brought closer to the cutting tool 101. Similarly, in the step (3), the work material 201 may be moved away from the cutting tool 101. When the cutting process is continued, the process of keeping the work material 201 rotated and bringing the cutting edge 107 of the insert into contact with different parts of the work material 201 may be repeated.

Examples of the material of the work material 201 include carbon steel, alloy steel, stainless steel, cast iron, and non-ferrous metal.

Although the embodiments according to the present disclosure have been illustrated above, it goes without saying that the present disclosure is not limited to the above-described embodiments and can be arbitrary as long as it does not deviate from the gist of the present disclosure.

1 ... Holder 1a ... First end (tip)
1b ... 2nd end (rear end)
3 ... 1st member 5 ... 2nd member 7 ... 1st end surface 9 ... 2nd end surface 11 ... 1st upper surface 13 ... Pocket 15 ... 3rd End surface 17 ... Second upper surface 19 ... Convex portion 21 ... Inclined surface 23 ... Recessed surface 25 ... First region 27 ... Second region 29 ... Third region 31 ... 4th area 33 ... 5th area 35 ... 1st lower surface 37 ... Opening 39 ... 1st part 41 ... 1st screw hole 43 ... 1st screw 45 ... 2 parts 47 ... 3rd part 49 ... 4th part 51 ... 1st side surface 53 ... 1st connection surface 55 ... 1st part 57 ... 2nd part 59 ... 1st 3 parts 101 ・ ・ Cutting tool 103 ・ ・ Cutting insert 105 ・ ・ Through hole 107 ・ ・ Cutting edge 109 ・ ・ 2nd screw 111 ・ ・ 2nd screw hole

Claims (13)

It has a rod shape extending from the first end to the second end along the central axis, and is located on the side of the first end and the first member located on the side of the second end. Has a second member,
The first member is
The first end surface located on the side of the first end and
The second end surface located on the side of the second end and
A first upper surface located between the first end face and the second end face,
It has a pocket located on the side of the first end and open on the first end surface and the first upper surface.
The second member is
A third end face located on the side of the first end and facing the second end face,
It has a second upper surface located next to the third end surface, and has.
When the virtual plane orthogonal to the central axis is used as the reference plane,
The third end face is
A rod-shaped convex portion protruding toward the first end and
An inclined surface that is located closer to the second upper surface than the convex portion and is inclined with respect to the reference surface.
A flat fourth region located away from the second upper surface with respect to the inclined surface and having the convex portion.
It has a fifth region located closer to the second upper surface than the inclined surface and located closer to the second end side than the fourth region.
The second end face is
The concave portion into which the convex portion is inserted and the concave portion
A first region located closer to the first upper surface than the recess and in contact with the inclined surface,
A second region located closer to the first upper surface than the first region,
A holder having a third region located farther from the first upper surface than the first region and located closer to the first end side than the second region. It has a rod shape extending from the first end to the second end along the central axis, and is located on the side of the first end and the first member located on the side of the second end. Has a second member,
The first member is
The first end surface located on the side of the first end and
The second end surface located on the side of the second end and
A first upper surface located between the first end face and the second end face,
It has a pocket located on the side of the first end and open on the first end surface and the first upper surface.
The second member is
A third end face located on the side of the first end and facing the second end face,
It has a second upper surface located next to the third end surface, and has.
When the virtual plane orthogonal to the central axis is used as the reference plane,
The third end face is
The convex portion protruding toward the first end and
It has an inclined surface that is located closer to the second upper surface than the convex portion and is inclined with respect to the reference surface.
The second end face is
The concave portion into which the convex portion is inserted and the concave portion
It has a first region that is located closer to the first upper surface than the recess and is in contact with the inclined surface.
The first region is a holder having a convex curved surface shape. The holder according to claim 1 or 2 , wherein the first member extends from the recess in a direction away from the first upper surface and further has a screw hole that is open on the outer surface. It has a rod shape extending from the first end to the second end along the central axis, and is located on the side of the first end and the first member located on the side of the second end. Has a second member,
The first member is
The first end surface located on the side of the first end and
The second end surface located on the side of the second end and
A first upper surface located between the first end face and the second end face,
It has a pocket located on the side of the first end and open on the first end surface and the first upper surface.
The second member is
A third end face located on the side of the first end and facing the second end face,
It has a second upper surface located next to the third end surface, and has.
When the virtual plane orthogonal to the central axis is used as the reference plane,
The third end face is
The convex portion protruding toward the first end and
It has an inclined surface that is located closer to the second upper surface than the convex portion and is inclined with respect to the reference surface.
The second end face is
The concave portion into which the convex portion is inserted and the concave portion
It has a first region that is located closer to the first upper surface than the recess and is in contact with the inclined surface.
The convex portion has a rod shape and is
The first part whose outer diameter becomes smaller toward the second end side, and
A second portion located closer to the first end than the first portion,
A third portion located closer to the second end than the first portion and having an outer diameter increasing toward the second end.
It has a fourth portion located closer to the second end than the third portion.
The first member further has a screw hole extending from the recess in a direction away from the first upper surface and opening on the outer surface.
The screw passed from the outer surface to the screw hole abuts on the first portion.
In the direction along the central axis, the length of the first portion is longer than the length of the third portion.
A holder in which the outer diameter of the second portion is the same as the outer diameter of the fourth portion. The holder according to claim 4 , wherein the first portion is connected to the third portion . The second end face is
A second region located closer to the first upper surface than the first region and parallel to the reference plane,
It further has a third region, which is located farther from the first upper surface than the first region and is parallel to the reference plane.
The opening of the recess is located in the third region.
The holder according to any one of claims 1 to 5 , wherein the area of the third region is larger than that of the second region. The first member further has a first lower surface located on the opposite side of the first upper surface.
The holder according to claim 6 , wherein the opening of the recess is located closer to the boundary between the third region and the first region than the boundary between the third region and the first lower surface. The holder according to any one of claims 1 to 7 , wherein the first region has a flat surface shape inclined with respect to the reference surface. When viewed through the plane from the side of the first end face,
The holder according to any one of claims 3 to 5, wherein the virtual extension line of the central axis of the screw hole and the angle formed by the first upper surface are 45 degrees or less. The first member is
The first lower surface located on the opposite side of the first upper surface and
A first side surface located between the first upper surface and the first lower surface,
It is located between the first lower surface and the first side surface, and further has the first lower surface and a first connection surface connected to the first side surface.
The holder according to any one of claims 3 to 5, 9 in which the screw holes are opened in the first lower surface and the first connection surface. When viewed through the plane from the side of the first end face,
The holder according to claim 9 or 10 , wherein the virtual extension line of the central axis of the screw hole intersects the center of the convex portion. The holder according to any one of claims 1 to 11.
A cutting tool having a cutting insert located in the pocket. The process of rotating the work material and
The step of bringing the cutting tool according to claim 12 into contact with the rotating work material, and
A method for manufacturing a work piece, comprising a step of separating the cutting tool from the work material.

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