JP2001030101A - Cutting tip, cutting method, and machining member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily apply compression working onto a cutting finish surface without addition of a process by providing at least a part between a rake surface and a flank with a compression working surface for plastically deforming a processed material. SOLUTION: This cutting tip 1 is used for cutting the outer periphery of a cylindrical member 8 as a processed material, and is rhombic. The cutting tip 1 comprises a rake surface 2 and a flank 3. A compression working surface 4 for plastically deforming the processed material is provided between the rake surface 2 and the flank. The rake surface 2 is rhombic. The flank 3 is provided so that it crosses the rake surface 2 along this rhombic shape at a slight acute angle than 90 degrees. All crossing lines between the rake surface 2 and the flank 3 in the cutting tip 1 are cutting blades 23.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting tip as a cutting tool and a cutting method using the same.

[0002]

2. Description of the Related Art When a metal material is cut, a cutting chip is usually set on a machine tool such as a lathe, and the chip is brought into contact with a material to be processed and relatively moved. There are various types of cutting tips depending on the shape of the material to be processed, the cutting shape, and the like. For example, there are various shapes such as a triangular shape, a square shape, and a rhombus shape.

[0003] Regardless of the shape of the conventional cutting tip 9, as shown in FIG. 21, the cutting tip 9 has a rake face 91 and a flank 92, and a cutting edge 95 is formed on the intersection line of these. . The cutting tip 9 is usually used by being set on a shank 99 holding the cutting tip.

[0004] At the time of cutting, usually, the cutting tip 9 is brought into contact with the material to be processed while the rake face 91 is raised with respect to the surface to be processed, and is relatively moved. As a result, on the surface to be processed of the material to be processed,
The chips are separated at the boundary and scooped out on the rake face 91.

[0005] By the way, cutting of a metal material is excellent in dimensional accuracy, but cannot strengthen a worked surface as in the case of plastic working. Therefore,
Various methods have been proposed for strengthening the cut surface. For example, after performing the cutting process, in a separate process, the processed surface is pressed with a fillet tool or the like to compress it,
There is a method of work hardening the processing surface by this.

Further, as disclosed in Japanese Utility Model Laid-Open No. 7-20215 and Japanese Utility Model Laid-Open No. 63-116219,
A processing method using a composite tool combining a cutting tool and a pressing tool has been proposed. With these tools,
After the cutting process, the compression process can be continuously performed by the same tool.

[0007]

However, the conventional cutting method has the following problems. That is, in the method using the fillet tool or the like, the compression process needs to be performed in a process different from the cutting process, which complicates the manufacturing process. Further, in the above-described method using a combined tool in which a cutting tool and a pressing tool are combined, the tool becomes a dedicated tool such as, for example, for drilling and plane machining. Therefore, it is difficult to easily apply the machining method using the composite tool to various cutting processes.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and has a cutting tip capable of easily performing compression processing on a cut surface without adding a process, and a cutting tip using the same. It seeks to provide a way.

[0009]

According to a first aspect of the present invention, in a cutting insert having a rake face and a flank, at least a part between the rake face and the flank is provided for plastically deforming a material to be processed. Characterized in that the cutting tip is provided with a compression-processed surface.

[0010] As described above, the compression-processed surface is a surface for plastically deforming the material to be processed. Here, plastic deformation refers to work hardening accompanied by dislocation. The formation of the compression-processed surface is performed at least at a part between the rake face and the flank face. Therefore, it may be provided on the entire length of the boundary between the rake face and the flank face,
Alternatively, they may be provided separately at a plurality of locations.

Next, the operation and effect of the present invention will be described.
As described above, the cutting tip of the present invention has a compression-processed surface between the rake face and the flank. Therefore, if this cutting tip is used, it is possible to perform a cutting process on the material to be processed and at the same time to give a plastic deformation in the same step by simply performing the same cutting method as in the past.

That is, when cutting is performed using the cutting tip, the compressed surface of the cutting tip is directed toward the surface to be processed of the workpiece, and the rake face is set up with respect to the surface to be processed. Contact and relative movement in the cutting direction. As a result, first, the portion in contact with the rake face is separated as chips. The portion facing the compression-processed surface is a remaining portion left on the material to be processed. Next, as the relative movement of the cutting tip progresses, the remaining portion left on the material to be processed is pressed by the compression processing surface and compressed. As a result, the above-mentioned remaining portion undergoes plastic deformation and hardens. Therefore, a work hardened portion reinforced by the plastic deformation is formed on the cut finish surface through which the compression-processed surface of the cutting tip has passed during the cutting process.

Therefore, if the above cutting tip is used,
The cutting surface can be strengthened at the same time as the cutting without additional steps.

Next, as in the second aspect of the present invention, it is preferable that a cutting edge is formed on an intersection line between the compression-processed surface and the rake surface. That is, by providing a clear cutting edge on the intersection line between the compression-processed surface and the rake surface, separation of the chip and the remaining portion can be performed smoothly. Therefore, subsequent compression processing of the remaining portion by the compression processing surface can be performed smoothly. Here, the cutting edge is a corner that can be a starting point for separating chips.

Further, as in the third aspect of the present invention, it is preferable that the angle between the compression-processed surface and the rake surface is less than 125 degrees. When this angle is 125 degrees or more, the intersection line between the compression-processed surface and the flank may act as a cutting edge. There is a problem that work hardening is not performed.

Also, as in the invention of claim 4, the height up to the intersection line between the compression-processed surface and the rake surface can be set according to the amount of plastic deformation applied to the material to be processed.
That is, plastic deformation is applied to the remaining portion facing the compression-processed surface as described above. Therefore, by setting the amount of the remaining portion according to the height up to the intersection line, the amount of plastic deformation applied to the workpiece can be easily adjusted. Here, the height to the intersection line can be represented by, for example, a distance from the intersection line to the end of the compression-processed surface as viewed from the rake face. It is, of course, possible to provide the compression-processed surface in a curved shape and to provide the compression-processed surface in a curved shape with the intersection line.

According to a fifth aspect of the present invention, there is provided a method for cutting a material to be processed with a cutting tip, comprising a rake face, a flank face, and a compression machined face provided at least in part between them. By moving the cutting tip relatively in the cutting direction while the compression-processed surface is in contact with the material to be processed, the portion facing the rake face is separated as chips and the compression The cutting method is characterized in that a remaining portion remaining at a position facing the processing surface is pressed by the compression processing surface and plastically deformed.

In the present cutting method, since the cutting tip having the above-mentioned compression-processed surface is used, compression processing, that is, plastic deformation can be easily performed on the cut surface of the material to be processed simply by performing ordinary cutting as described above. Can be applied. As a result, a work hardened portion can be formed on the cut surface of the material to be processed, and the cut surface can be easily strengthened.

According to a sixth aspect of the present invention, there is provided a cutting member having a cut finished surface which has been subjected to a cutting process, wherein the cut finished surface has a rake face and a flank face and at least a gap between the rake face and the flank face. This is performed using a cutting tip that is partially provided with a compression-processed surface for plastically deforming the material to be processed, and a work-hardened portion that is plastically deformed by being pressed by the compression-processed surface is used as the cut surface. It is a cutting member characterized by being formed.

The formation of the above-mentioned finished surface in the above-mentioned machined member is performed using the above-mentioned special cutting tip. Thus, the work hardened portion can be formed on the finished surface by simply performing the same cutting method as in the related art. Therefore, it is not necessary to newly provide a step of strengthening the finished surface after the cutting step, so that it is possible to reduce the cost of the machined member having the enhanced finished surface.

Further, since the work hardened portion is formed by a compression process using a compression-processed surface of the cutting tip,
As long as the cutting conditions are constant, it can be formed stably and uniformly. Therefore, the cutting member of the present invention is low in cost and has a uniformly strengthened cutting surface. Therefore, it is possible to improve the durability of a machine constituted by using the cut member, or to expand the use of the cut member.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 A cutting tip according to an embodiment of the present invention and a cutting method using the same will be described with reference to FIGS. As shown in FIG. 3, the cutting tip 1 of the present embodiment is used for cutting the outer peripheral portion of a cylindrical member 8 as a material to be processed, and has a diamond shape. This cutting tip 1
Has a rake face 2 and a flank face 3 as shown in FIGS. Between the rake face 2 and the flank face 3,
A compression processing surface 4 for plastically deforming the material to be processed is provided.

The rake face 2 has a diamond shape as shown in FIG. As shown in FIGS. 1B and 2, the flank 3 is provided along the rhombic shape so as to intersect the rake face 2 at a slightly more acute angle than at a right angle. In the cutting tip 1, all the intersection lines between the rake face 2 and the flank face 3
It has become.

In this embodiment, as described above, the rake face 2 is formed at one acute angle side corner portion 11 of the rhombus.
And a flank 3 between which a compression-processed surface 4 is provided. The actual production of the cutting tip 1 is performed, for example, by cutting the cutting edge 2 formed by the intersection line of the rake face 2 and the flank 3 provided in advance at the corner portion 11.
The compressed surface 4 can be provided by cutting off the portion 3.

Further, the compression-processed surface 4 of the present embodiment corresponds to FIGS.
As shown in the figure, the intersection line 2 between the compression processing surface 4 and the rake surface 2
4 is provided so as to be a straight line, and is provided so as to be parallel to the processing surface of the workpiece 8 in use. A cutting edge is formed at the intersection line 24.

Here, a specific example of the dimensional relationship in the cutting tip 1 will be described. First, as shown in FIG. 1C, the angle α formed between the compression-processed surface 4 and the rake face 2 was set to about 106 degrees. Also, as shown in FIGS. 1A and 1B, the height a from the rake face to the intersection line 24 between the compression-processed face 4 and the rake face 2 was 0.1 mm. In addition, compression processing surface 4
The height b as viewed from the flank 2 was 0.35 mm. Note that these dimensions can be changed depending on the material of the material to be processed, the purpose of processing, and the like.

Next, when cutting the outer peripheral surface of the cylindrical member 8 as the material to be processed using the cutting tip 1 of the present embodiment, the material 8 and the cutting tip 1 are put on a lathe (not shown).
The positional relationship is set as shown in FIGS. That is, the compression processing surface 4 of the cutting tip 1 is directed toward the workpiece 8 and the rake face 2 is directed in the cutting direction (the direction opposite to the rotation direction C of the workpiece 8). At this time, the intersection line 24 between the compression processing surface 4 and the rake surface 2 was set so as to be parallel to the processing surface of the workpiece 8. In addition, the inclination angle β of the flank 3 of the cutting tip 1 in the feed direction B is 3
Degree.

Next, as shown in FIGS. 4 and 5, while maintaining the state of contact between the cutting tip 1 and the workpiece 8, the workpiece 8 is rotated in the direction of arrow C and the cutting tip 1 is removed. Feed gradually in the direction of arrow B. That is, the cutting operation is performed by the same cutting method as the conventional method except that the cutting tip 1 is used. As a result, the workpiece 8 is subjected to the cutting process and, at the same time, the cut surface is strengthened.

This will be described with reference to FIG. FIG. 2 is a model diagram illustrating a mechanism at the time of cutting by the cutting tip 1. As shown in the drawing, the cutting tip 1 which comes into contact with the material to be processed 8 and relatively advances in the cutting direction first separates the portion which comes into contact with the rake face 2 as chips 81. At this time, in this example, since the intersection line 24 between the compression processing surface 4 and the rake face 2 is a cutting edge, the chips 81
2 is separated smoothly.

Next, the material 8 to be treated faces the compression-processed surface 4.
The remaining portion 82 remaining on the side is pressed by the compression processing surface 4 as the cutting tip 1 relatively advances, and is compressed. As a result, the remaining portion 82 remains as a work hardened layer 84 hardened by plastic working on the finished surface of the cutting process. Thus, the portion cut by the cutting tip 1 is in a state reinforced by the presence of the work hardened layer 84.

As described above, if the cutting tip 1 of this embodiment is used, the presence of the compression processing surface 4 makes it possible to easily perform the compression processing simultaneously with the cutting on the cutting surface without adding a process. it can.

Embodiment 2 In this embodiment, as shown in FIGS. 8 to 10, the shape and the like of the compression processing surface 4 of the diamond-shaped cutting tip 1 of Embodiment 1 are changed. First, the cutting tip 1 shown in FIG.
The compression processing surface 4 is provided on both of the two acute angle side corner portions 11 and 12. In this case, when one corner cannot be used due to wear or the like, the same cutting as described above can be performed simultaneously with the compression working by using the other corner.

The cutting insert 1 shown in FIG. 9 has a compression-processed surface 4 provided not only on the acute-angled corner 11 but also on one side of the rake face 2 in the shape of a diamond. Also in this case, compression processing can be performed simultaneously with cutting in the same manner as described above. In this case as well, a compression-processed surface can be provided on a side facing one side where the compression-processed surface 4 is provided.

The cutting insert 1 shown in FIG. 10 has a compression face 4 provided on two sides of the rake face 2 sandwiching the acute-angle corner. Also in this case, compression processing can be performed simultaneously with cutting in the same manner as described above. Note that a compression-processed surface may also be provided on the side facing the side on which the compression-processed surface 4 is provided. In this case, the degree of freedom in setting the cutting tip 1 can be increased.

In the first and second embodiments,
Although a diamond-shaped cutting tip has been described as an example, a similar effect can be obtained in the case of a cutting tip having a triangular, quadrangular or other shape. The rake face 2
The cutting edge 23 formed on the intersection line between the flank 3 and the flank 3 may be provided with a honing surface for preventing chipping or the like. In this case, since substantially no compression processing is performed on the honing surface, the same operation and effect as described above can be obtained.

Further, in the first and second embodiments, the example in which the outer peripheral surface of the cylindrical member 8 is cut has been described. However, the end surface of the cylindrical member is cut, the inner and outer peripheral surfaces of the cylindrical member are cut, and the like.
It goes without saying that the present invention can be applied to any cutting process using a cutting tip.

Embodiment 3 This embodiment is an example of a cutting tip for grooving. As shown in FIG. 11, the cutting tip 50 of this example is provided with three cutting tips 5 for grooving.
It is configured such that one cutting tip 5 can be used properly.

As shown in FIGS. 12 and 13, each cutting tip 5 has a rake face 2 and a flank face 3 and two corner portions 51 and 52. A compression processing surface 4 for plastically deforming the workpiece 8 is provided between the rake face 2 and the flank face 3 at one corner portion 51.

The rake face 2 has a rectangular shape as shown in FIG. FIG. 12 (b)
(C) As shown in FIG. 13, the flank 3 is provided in a U-shape along the contour of the rake face 2 and the rake face 2 is provided.
Are provided so as to intersect at a slightly more acute angle than at right angles.

Further, in the cutting tip 5, all the intersection lines between the rake face 2 and the flank face 3 are cutting edges 23. In this example, the compression processing surface 4 is provided at one corner 51 of the two corners. The compression-processed surface 4 can also be provided by, for example, cutting off a portion of the cutting edge 23 on the intersection line between the rake face 2 and the flank 3 in the corner portion 51.

Further, as shown in FIGS. 12 and 13, the compression processing surface 4 of this embodiment is provided so that the intersection line 24 between the compression processing surface 4 and the rake face 2 is a straight line, and the compression processing surface 4 and the rake surface 2 are provided below. The intersection line 2 is formed so that the angle γ formed by the flank 3 is about 30 degrees.
4 was provided (FIG. 12A). A cutting edge is formed at the intersection line 24.

Here, a specific example of the dimensional relationship in the cutting tip 5 will be described. First, as shown in FIG. 12D, the angle ε formed between the compression-processed surface 4 and the rake face 2 was set to about 106 degrees. Further, as shown in FIGS. 12A and 12B, the height (width) a up to the intersection line 24 between the compression-processed surface 4 and the rake face 2 was 0.1 mm as viewed from the rake face. The height (width) b of the compression processing surface 4 as viewed from the flank 2 was 0.35 mm. These dimensions can be changed depending on the material of the material to be processed.

Next, using the cutting tip 5 of this embodiment, FIG.
The groove 88 is formed on the inner peripheral surface of the cylindrical member 801 having the shape shown in FIG.
Will be described. In this case, first, the cylindrical member 801 and the cutting tip 50 are placed on a lathe (not shown).
Is set in the positional relationship shown in FIG. That is, with the rake face 2 of the cutting tip 5 raised, the two corner portions 51 and 52 are
Contact. Then, as shown in FIG. 14B, the cutting tip 5 is moved relative to the workpiece 801 by rotating the workpiece 801. That is, the cutting operation is performed by the exactly same cutting method as the conventional method except that the cutting tip 5 is used. As a result, the material to be processed 801 is subjected to grooving and, at the same time, its bottom corner is reinforced.

This will be described with reference to FIG. The figure shows
FIG. 9 is a model diagram illustrating a cutting mechanism at a bottom corner portion 881 of a groove 88 corresponding to a corner portion 51 of the cutting tip 5. As shown in the drawing, the cutting tip 5 which comes into contact with the cylindrical member 801 as the material to be processed and relatively advances in the cutting direction firstly cuts the portion which comes into contact with the rake face 2 into the cutting chips 81.
To separate. At this time, in this example, since the intersection line 24 between the compression processing surface 4 and the rake face 2 is a cutting edge, the chips 81 are separated smoothly from the remaining portion 82.

Next, the material 8 to be treated faces the compression-processed surface 4.
The remaining portion 82 remaining on the side is pressed by the compression processing surface 4 as the cutting tip 1 relatively advances, and is compressed. As a result, the remaining portion 82 becomes a work hardened portion 84 hardened by plastic working as a bottom corner 8 of the groove 88.
It remains at 81. As a result, the groove 88 cut by the cutting tip 1 has one of the bottom corners 881 at the work hardened portion 8.
4 makes the state strengthened.

As described above, if the cutting tip 5 of this embodiment is used, it is possible to easily reinforce the bottom corner of the groove simply by performing the same cutting work as in the related art without adding a process. it can. Further, the work hardened portion 84 can be provided uniformly as long as the cutting conditions are constant. for that reason,
The resulting cylindrical member 801 has low cost and excellent groove strength characteristics. Therefore, it is possible to improve the durability and the like of the machine constituted by using this.

Embodiment 4 In this embodiment, the effect of using the cutting tip 5 of Embodiment 3 was quantitatively measured. Specifically, as shown in FIG. 17, the hardness of three points A, B, and C near the bottom corner 881 through which the compression-processed surface 4 has passed in the groove 88 formed by cutting with the cutting tip 5 is measured. did. For comparison, the same positions (A, B, and B) were also set for grooves formed using a conventional cutting tip without the compression-processed surface 4.
In C), the hardness was measured.

FIG. 18 shows the result. In the figure, the horizontal axis represents the measurement position, and the vertical axis represents the hardness. And
The case of the example of the present invention (embodiment 3) using the cutting tip 5 having the compression-processed surface 4 is indicated by reference numeral E1, and the case of using the conventional cutting tip is indicated by reference numeral C1. As can be seen from FIG.
Groove part 881 of the groove 88 formed using the cutting tip 5 of FIG.
It can be seen that the hardness of the steel is greatly improved as compared with the conventional one.

Embodiment 5 As shown in FIG. 19, in this embodiment, a cutting edge formed on an intersection line 23 between the rake face 2 and the flank 3 of the cutting tip 5 in Embodiment 3 is provided with a honing surface 230. This is an example in which is provided.

The honing surface 230 has a width sufficiently smaller than the compression processing surface 4 as shown in FIG.
The angle formed between the honing surface 230 and the rake face 2 is larger than the angle ε formed between the compression-processed surface 4 and the rake face 2. As a result, at the portion where the honing surface 230 is provided, the crossing line between the honing surface 230 and the flank 3 becomes the tip of the cutting edge 23 when viewed microscopically.

Also in this case, similarly to the third embodiment, at the time of cutting, a work hardened portion in which plastic deformation by compression is applied only to the bottom corner of the groove through which the corner 51 having the compressed surface 4 has passed. 84 can be provided. Further, in the portion where the honing surface 230 is provided, since no substantial compression processing is performed, no work hardened portion is formed. Otherwise, the same effects as in the third embodiment can be obtained.

In each of the third to fifth embodiments, the compression-processed surface 4 is provided only at one corner 51, but it can be provided at another corner 52 as well. In this case, work hardening portions 84 are provided at the bottom corners on both sides of the groove 80, and these can be reinforced.

Embodiment 6 In this embodiment, as shown in FIG. 20, the compression machined surface 4 of the cutting tip 1 in Embodiment 3 is provided in a curved shape, and the intersection line between the compression machined surface 4 and the rake face 2 is formed. This is an example in which 24 is changed to a curved shape.

In this case, the shape of the compression processing surface 4 can be made closer to the shape of the bottom groove 881 of the groove 88. Therefore, for example, in the bottom groove 881, the above A to C
The strength of the point (FIG. 17) can be more uniformly improved. Otherwise, the same operation and effect as those of the third embodiment can be obtained.

[0055]

As described above, according to the present invention, there is provided a cutting tip capable of easily performing a compression process on a cutting surface without adding a process, and a cutting method using the same. be able to.

[Brief description of the drawings]

FIG. 1A is an explanatory view of a cutting tip according to a first embodiment, as viewed from a rake face, FIG. 1B is a side view as viewed from a flank face,
(C) Sectional view taken along line AA.

FIG. 2 is a perspective view of a cutting tip according to the first embodiment.

FIG. 3 is an explanatory diagram showing a positional relationship between a cutting tip and a material to be processed in the first embodiment.

FIG. 4 is an explanatory diagram of a positional relationship between a cutting tip and a workpiece in a first embodiment viewed from the front in a cutting direction;

FIG. 5 is an explanatory view of FIG. 4 as viewed from an arrow X direction.

FIG. 6 is an explanatory diagram when FIG. 4 is viewed from an arrow Y direction.

FIG. 7 is an explanatory diagram showing a work hardening portion forming mechanism during cutting in the first embodiment.

FIG. 8 is a front view of another example of the cutting insert according to the first embodiment viewed from a rake face.

FIG. 9 is a front view of another example of a cutting tip in Embodiment 2 as seen from a rake face.

FIG. 10 is a front view of another example of a cutting tip in Embodiment 2 as viewed from a rake face.

FIG. 11A illustrates a cutting tip according to a third embodiment.
Side view, (b) Front view.

FIGS. 12A and 12B show cutting tips according to Embodiment 3;
Explanatory diagram viewed from the rake face, (b) Explanatory diagram viewed from the arrow Y direction, (c) Explanatory diagram viewed from the arrow X direction, (d) D
FIG.

FIG. 13 is a perspective view of a cutting tip according to a third embodiment.

FIGS. 14A and 14B are explanatory diagrams showing a state in which a workpiece is being cut by a cutting tip in a third embodiment, and FIG.
FIG. 3 is a sectional view taken along line EE.

15A is a plan view and FIG. 15B is a cross-sectional view taken along line FF of the material to be processed in the third embodiment.

FIG. 16 is an explanatory view showing a work hardened portion forming mechanism at the time of cutting in the third embodiment.

FIG. 17 is an explanatory view showing a groove cross section and a hardness measurement position in a fourth embodiment.

FIG. 18 is an explanatory diagram showing a hardness measurement result in the fourth embodiment.

FIG. 19 is a perspective view of a cutting tip according to a fifth embodiment.

FIG. 20 is an explanatory view of a cutting tip according to a sixth embodiment as viewed from a rake face.

FIG. 21 is a perspective view of a cutting tip in a conventional example.

[Explanation of symbols]

 1,5. . . Cutting tips, 11, 12, 51, 52. . . Corner part, 2. . . Rake face, 23. . . Cutting edge, 24. . . 3. intersection line (cutting edge); . . 7. compression processing surface, . . Material to be treated, 81. . . Chip, 82. . . Remaining part, 84. . . Work hardening part,

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Shigeharu Ikeda 10 Takane, Fujii-machi, Anjo, Aichi Prefecture Inside Aisin AW Co., Ltd. (72) Minoru Hidaka 10 Takane, Fujii-machi, Anjo, Aichi Prefecture (72) Inventor Hironori Fukushima 10th Takane, Fujii-cho, Anjo-shi, Aichi F-term (reference) 3C046 BB00 CC01 JJ04

Claims (6)

[Claims] 1. A cutting insert having a rake face and a flank, wherein at least a part between the rake face and the flank is provided with a compression-processed face for plastically deforming a material to be processed. A cutting tip characterized by the above-mentioned. 2. The cutting insert according to claim 1, wherein a cutting edge is formed on an intersection line between the compression-processed surface and the rake surface. 3. The cutting insert according to claim 1, wherein an angle between the compression-processed surface and the rake surface is less than 125 degrees. 4. The method according to claim 1, wherein:
A cutting tip, wherein a height to an intersection line between the compression-processed surface and the rake surface is set according to an amount of plastic deformation applied to a material to be processed. 5. A method for cutting a material to be processed by a cutting tip, wherein a cutting tip having a rake face, a flank face, and a compression-processed face provided at least in part between them is used. By relatively moving the cutting tip in the cutting direction while the processing surface is in contact with the material to be processed, the portion facing the rake surface is separated as chips and remains at the position facing the compression processing surface. A cutting method, characterized in that the remaining portion is plastically deformed by being pressed by the compression-processed surface. 6. A machined member having a machined surface having a machined surface, wherein the machined surface has a rake surface and a flank surface, and at least a portion between the rake surface and the flank is formed by plasticizing the material to be processed. It is performed using a cutting tip provided with a compression-processed surface for deformation, and a work hardened portion formed by pressing and being plastically deformed by the compression-processed surface is formed on the cut finished surface. To be machined.