CN112387999A

CN112387999A - Cutting machining tool

Info

Publication number: CN112387999A
Application number: CN202011041052.5A
Authority: CN
Inventors: 姜恩来; 陈友梁; 李清华; 王珏; 王杰伟; 邹伶俐
Original assignee: Xiamen Golden Egret Special Alloy Co Ltd
Current assignee: Xiamen Golden Egret Special Alloy Co Ltd
Priority date: 2020-09-28
Filing date: 2020-09-28
Publication date: 2021-02-23

Abstract

The invention discloses a cutting processing tool, which comprises a cutting blade and a cutter body; the cutting blade is mounted on the cutter body; the cutting insert includes an insert body; the insert body comprises an upper surface, a bottom surface, and sides; the insert body has more than two concave structures distributed between the side and bottom surfaces of the cutting insert. According to the structure, on one hand, the blade can be prevented from easily rotating during cutting, stable cutting and uniform abrasion of the blade are guaranteed, and the stability of cutting is further guaranteed; on the other hand, even under severe working conditions, the blade can be ensured not to fly out along the radial direction of the cutting tool under the condition of screw fracture or blade damage, so that the damage to personnel and equipment can be prevented, and the safety of cutting processing is improved; furthermore, precise control of the indexing position and number of indexing of the cutting insert is also achieved.

Description

Cutting machining tool

Technical Field

The invention relates to the technical field of cutters, in particular to a cutting machining tool.

Background

In the cutting process of the existing cutting blade, especially the cutting blade with the arc edge (such as a round blade, an S-shaped cutting blade with the arc edge, etc.), the cutting force of the blade edge along the tangential direction can generate a large torque, so that the blade is easy to rotate and shift around a connecting screw, the connecting screw is loosened, and the clamping of the blade is loosened. In this case, the blade vibrates during cutting to form chatter marks and scratches on the surface of the workpiece, which affects the quality of the machined surface, and also causes chipping of the blade edge and chipping of the blade to shorten the machining life of the blade, and the chipped blade may injure the workpiece, the cutting tool, the machine tool, and the like, thereby threatening the personal safety of the operator.

The rotation of the cutting insert during cutting also makes the number of times the insert can be used uncertain, while at the same time reducing the stability of the cutting process, which undoubtedly increases the costs and risks for the cutting process.

In cutting machining, particularly in milling machining, when the screw is broken, due to centrifugal force in milling machining, the cutting blade can fly out along the radial direction of the cutting tool, so that damage to a machined workpiece and damage to the cutting tool are caused, and even irreversible influence or personal injury to a machine tool is caused to an operator in severe cases.

In the prior art, a rotation prevention surface is usually arranged between a cutting blade and a cutter body to prevent the cutting blade from rotating in the machining process, fig. 1 is a structural schematic view of a circular cutting blade of the prior art, as shown in fig. 1, such a circular cutting blade 100 comprises an upper surface 101, a lower surface 102, a side surface 103 and a through hole 104 penetrating the upper and lower surfaces, wherein the side surface 103 is provided with at least one rotation prevention surface 105, and the rotation of the cutting blade in the machining process can be prevented by matching with the rotation prevention surface in the cutter body, but the circular cutting blade 100 encounters an abrupt situation in the cutting machining process, the flying-out of the cutting blade cannot be prevented, and the safety of the cutting machining cannot be ensured.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a cutting tool, which can prevent the easy rotation of a blade during cutting processing through structural improvement, ensure the stable cutting and uniform abrasion of the blade and further ensure the stability of the cutting processing; on the other hand, even under severe working conditions, the blade can be ensured not to fly out along the radial direction of the cutting tool under the condition of screw fracture or blade damage, so that the damage to personnel and equipment can be prevented, and the safety of cutting processing is improved; furthermore, precise control of the indexing position and number of indexing of the cutting insert is also achieved.

The technical scheme adopted by the invention for solving the technical problems is as follows: a cutting tool includes a cutting insert and a cutter body; the cutting blade is mounted on the cutter body; the cutting insert includes an insert body; the insert body comprises an upper surface, a bottom surface, and sides; the upper surface and the side surface are intersected and transited to form a cutting edge, the upper surface is a front cutter surface, and the side surface is a rear cutter surface; the insert body has more than two concave structures distributed between the side surface and the bottom surface of the cutting insert; the maximum vertical distance between each point in the concave structure and the bottom surface is H, the cutting blade is cut by a parallel plane which is H away from the bottom surface, wherein H is more than or equal to 0 and less than or equal to H, and the intersection point of the concave structure and the side surface in the section is M₀、M₀', passing M₀、M₀' two points of the straight line are l₀Forming a plurality of strips parallel to the cutting blade from the periphery to the center of the cutting blade₀Straight line l of₁，l₂，l₃……l_n… …, wherein l_nRepresenting the nth straight line, n being a non-negative integer, straight line l₁，l₂，l₃……l_n… … and the intersection points of the concave structures are M₁、M₁’，M₂、M₂’，M₃、M₃’……M_n、M_n' … …, at least one | M is present in at least one of the parallel plane and the concave profile from the bottom surface_nM′_n|＞|M₀M′₀Wherein n > 0.

The cutter body is provided with a matching structure for matching with the concave structure of the cutting blade; cutting the matching structure of the cutting blade and the cutter body by the parallel plane with the distance h from the bottom surface, and passing through the intersection point M of the concave structure and the side surface₀、M₀' line l₀The intersection point with the matching structure is N₀、N₀', said innumerable strips in the direction from the periphery to the center of the cutting insert are parallel to l₀Straight line l of₁，l₂，l₃……l_n… …, and the intersection points with the matching structures are respectively N₁、N₁’，N₂、N₂’，N₃、N₃’……N_n、N_n' … …, if there is no intersection point, | N_nN′_n0, at least one parallel plane at a distance h from the bottom surface and at least one | N in the profile of the concave structure_nN′_n|＞|M0M′₀I, and I N_nN′_n|-|M₀M′₀The | is more than 0.1; wherein n is greater than 0.

Setting up

Is a positive vector, then each section

Are all positive vectors, and are,

are all negative vectors, and | M_nN_n|＞0，|M′nN′_nAnd | is greater than 0, wherein n is greater than or equal to 0.

The parallel plane h away from the bottom surface cuts open the matching structure of the blade body and the cutter body and has a straight line k₀Perpendicular to the straight line l₀And intersects the left side of the concave structure and the leftmost side of the mating structure at an intersection point X with the concave structure₀、X₀', the intersection point with the matching structure is Y₀、Y₀’，|X₀X′₀|＞0，|Y₀Y′₀0, forming innumerable strips parallel to k from left to right₀Straight line k of₁，k₂，k₃……k_n… …, wherein k_nRepresenting the nth straight line, n being a non-negative integer, straight line k₁，k₂，k₃……k_n… …, the concave structure and the line l₀The intersection points of the formed closed spaces are X respectively₁、X₁’，X₂、X₂’，X₃、X₃’……X_n、X_n' … …, the mating structure and the line l₀The intersection points of the formed closed spaces are respectively Y₁、Y₁’，Y₂、Y₂’，Y₃、Y₃’……Y_n、Y_n', up to | Y_nY′_n0, where n ≠ 0, and each profile is | X_nX′_n|＞|Y_nY′_nWherein n is more than or equal to 0.

The maximum distance between the cutting edge and the bottom surface of the blade body is S, and H is more than or equal to 10% and less than or equal to 60% S.

The included angle between the tangent plane of one point on the connecting plane of the concave structure and the bottom surface and a vertical line passing through the point is alpha, alpha is more than or equal to 0 degree and is less than or equal to 40 degrees, the included angle between the tangent plane of one point on the connecting plane of the concave structure and the side surface and a horizontal line is beta, and beta is more than or equal to 0 degree and is less than or equal to 30 degrees.

The diameter of the inscribed circle on the upper surface of the blade body is D, in | M_nM′_nUnder the condition of | +0, the center line of the blade body in the thickness direction and the straight line l on the corresponding section_nHas a minimum vertical distance of d_minAnd 10% of D is not more than D_min≤30％D。

The parallel plane with the distance h from the bottom surface cuts through the matching structures of the blade body and the cutter body, and at least one section has 0 < | M'_xN′_x|_min0.3 ≦ and 0 < | M 'in at least one plane section'_yN′_y|_minLess than or equal to 0.3, wherein x and y are positive integers.

The cutter body is provided with a mounting groove for mounting the cutting insert, the mounting groove including a positioning surface for mating with a bottom surface of the insert body; the maximum vertical distance from any point of the matching structure protruding out of the positioning surface part of the cutter body to the positioning surface of the cutter body is Z, and Z is more than or equal to 10% and less than or equal to 70% H.

The concave structural cross-sectional shape includes, but is not limited to, trapezoidal, circular, or irregular; the mating structure includes, but is not limited to, a mating wedge or a mating screw; the upper surface shape includes, but is not limited to, circular or polygonal.

Compared with the prior art, the invention has the beneficial effects that:

the invention adopts the structure that the blade body has more than two concave structures which are distributed between the side surface and the bottom surface of the cutting blade; and the maximum vertical distance between each point in the concave structure and the bottom surface is H, the cutting blade is cut by a parallel plane which is H away from the bottom surface, wherein H is more than or equal to 0 and less than or equal to H, and the intersection point of the concave structure and the side surface in the section is M₀、M₀', passing M₀、M₀' two points of the straight line are l₀Forming a plurality of strips parallel to the cutting blade from the periphery to the center of the cutting blade₀Straight line l of₁，l₂，l₃……l_n… …, wherein l_nRepresenting the nth straight line, n being a non-negative integer, straight line l₁，l₂，l₃……l_n… … and the intersection points of the concave structures are M₁、M₁’，M₂、M₂’，M₃、M₃’……M_n、M_n' … …, at least one | M is present in at least one of the parallel plane and the concave profile from the bottom surface_nM′_n|＞|M₀M′₀And | wherein n > 0. According to the structure, on one hand, the blade can be prevented from easily rotating during cutting, stable cutting and uniform abrasion of the blade are guaranteed, and the stability of cutting is further guaranteed; on the other hand, even under the bad working condition, the blade can be ensured to be positionedThe screw cannot fly out along the radial direction of the cutting tool under the condition of fracture or damage of the blade, so that the injury to personnel and equipment can be prevented, and the safety of cutting processing is improved; furthermore, precise control of the indexing position and number of indexing of the cutting insert is also achieved.

The invention is further explained in detail with the accompanying drawings and the embodiments; however, a cutting tool of the present invention is not limited to the embodiment.

Drawings

FIG. 1 is a schematic view of a circular cutting insert configuration of the prior art;

fig. 2 is a perspective view of a cutting insert according to a first embodiment of the present invention;

fig. 3 is a side view of a cutting insert according to a first embodiment of the present invention;

fig. 4 is a top view of a cutting insert according to a first embodiment of the present invention;

FIG. 5 is a cross-sectional view taken along line A-A of FIG. 4;

fig. 6 is a bottom view of a cutting insert according to a first embodiment of the present invention;

fig. 7 is a schematic view of the mounting of a cutting insert and a cutter body according to a first embodiment of the present invention;

fig. 8 is a cross-sectional view taken along line B-B of the cutting insert shown in fig. 7 after being seated in the cutter body;

FIG. 9 is an enlarged schematic view of section C of FIG. 8;

fig. 10 is a cross-sectional view (tangential distribution) of the mating structure of the cutting insert and the cutter body with a parallel plane at a distance h from the bottom surface of the insert body according to the first embodiment of the present invention;

fig. 11 is a sectional view (normal distribution) of the mating structure of the cutting insert and the cutter body with a parallel plane at a distance h from the bottom surface of the insert body according to the first embodiment of the present invention;

fig. 12 is a perspective view of a cutting insert according to a second embodiment of the present invention;

fig. 13 is a side view of a cutting insert according to a second embodiment of the present invention;

fig. 14 is a top view of a cutting insert according to a second embodiment of the present invention;

FIG. 15 is a sectional view taken along line E-E in FIG. 4;

fig. 16 is a bottom view of a cutting insert according to a second embodiment of the present invention;

fig. 17 is a schematic view of the mounting of a cutting insert and a cutter body according to a second embodiment of the present invention;

fig. 18 is a cross-sectional view taken along line F-F of the cutting insert shown in fig. 17 after being mounted in a cutter body;

fig. 19 is a perspective view of a cutting insert according to a third embodiment of the present invention;

fig. 20 is a bottom view of a cutting insert of a third embodiment of the present invention;

fig. 21 is a perspective view of a cutting insert according to a fourth embodiment of the present invention;

fig. 22 is a bottom view of a cutting insert according to a fourth embodiment of the present invention.

In the drawings, 1, an insert body of a cutting insert; 2. an upper surface of the insert body; 3. a side of the blade body; 4. a bottom surface of the insert body; 5. a cutting edge; 6. a concave configuration of the blade body; 7. a cutter body; 8. the matching structure of the cutter body; 81. a mating wedge of the cutter body; 82. a mating screw of the cutter body; 9. a connecting screw of the cutting insert; 10. the locating surface of the cutter body.

Detailed Description

Example one

Referring to fig. 2 to 11, a cutting tool of the present invention includes a cutting insert 1 and a cutter body 7; the cutting insert 1 is mounted on the cutter body 7 by a coupling screw 9; the cutting insert 1 comprises an insert body; the insert body 1 comprises an upper surface 2, a bottom surface 4 and a side surface 3; the upper surface 2 and the side surface 3 are intersected and transited to form a cutting edge 5, the upper surface 2 is a front cutter surface, and the side surface 3 is a rear cutter surface; the insert body 1 presents more than two concave structures 6 distributed between the side surface 3 and the bottom surface 4 of the cutting insert 1; the maximum vertical distance between each point in the concave structure 6 and the bottom surface 4 is H, the cutting blade 1 is cut by a parallel plane H away from the bottom surface 4, wherein H is more than or equal to 0 and less than or equal to H, and the intersection point of the concave structure 6 and the side surface 3 in the section is M₀、M₀', passing M₀、M₀' two points of the straight line are l₀A plurality of lines formed in parallel with the cutting insert 1 from the periphery toward the center₀Straight line l of₁，l₂，l₃……l_n… …, wherein l_nRepresenting the nth straight line, n being a non-negative integer, straight line l₁，l₂，l₃……l_n… … and the concave structure 6 respectively have an intersection point M₁、M₁’，M₂、M₂’，M₃、M₃’……M_n、M_n' … …, at least one | M is present in at least one of the parallel plane and the concave profile from the bottom surface_nM′_n|＞|M₀M′₀And | wherein n > 0. The concave structure 6 of the present invention is a small opening concave structure.

The cutter body 7 is provided with a matching structure 8 for matching with the concave structure 6 of the cutting blade 1; cutting the cutting insert 1 and the cooperating structure 8 of the tool body with said parallel plane at a distance h from the bottom surface, passing through the point M of intersection of the concave structure 6 and the side surface 3₀、M₀' line l₀The point of intersection with the matching structure 6 is N₀、N₀', said innumerable strips in the direction from the periphery to the center of the cutting insert 1 are parallel to l₀Straight line l of₁，1₂，1₃……l_n… …, and the intersection points with the fitting structure 8 are respectively N₁、N₁’，N₂、N₂’，N₃、N₃’……N_n、N_n' … …, if there is no intersection point, | N_nN′_n0, at least one parallel plane at a distance h from the bottom surface and at least one | N in the profile of the concave structure_nN′_n|＞|M₀M′₀I, and I N_nN′_n|-|M₀M′₀The | is more than 0.1; wherein n is greater than 0. The mating structure 8 of the present invention is captured within the recessed structure 6.

Setting up

Is positiveVector, then each section

Are all positive vectors, and are,

are all negative vectors, and | M_nN_n|＞0，|M′_nN′_nAnd | is greater than 0, wherein n is greater than or equal to 0. In tangential direction of the cutting insert, there is a clearance between the mating structure 8 and the concave structure 6.

The matching structure 8 of the blade body 1 and the cutter body 7 is cut on the parallel plane h away from the bottom surface and has a straight line k₀Perpendicular to the straight line l₀And intersects the left side of the concave structure 6 and the leftmost side of the mating structure 8 at an intersection point X with the concave structure 6₀、X₀', the point of intersection with the mating structure 8 is Y₀、Y₀’，|X₀X′₀|＞0，|Y₀Y′₀0, forming innumerable strips parallel to k from left to right₀Straight line k of₁，k₂，k₃……k_n… …, wherein k_nRepresenting the nth straight line, n being a non-negative integer, straight line k₁，k₂，k₃……k_n… …, the concave structure 6 and the line l₀The intersection points of the formed closed spaces are X respectively₁、X₁’，X₂、X₂’，X₃、X₃’……X_n、X_n' … …, the fitting structure 8 and the line l₀The intersection points of the formed closed spaces are respectively Y₁、Y₁’，Y₂、Y₂’，Y₃、Y₃’……Y_n、Y_n', up to | Y_nY′_n0, where n ≠ 0, and each profile is | X_nX′_n|＞|Y_nY′_nWherein n is more than or equal to 0. In the normal direction of the cutting insert, there is a gap between the mating structure 8 and the concave structure 6.

The maximum distance between the cutting edge 5 and the bottom surface 4 of the insert body 1 is S, and H is more than or equal to 10% and less than or equal to 60% S. The height of the concave structure of the present invention does not affect the strength of the cutting insert.

The included angle between the tangent plane of one point on the connecting plane of the concave structure and the bottom surface and a vertical line passing through the point is alpha, alpha is more than or equal to 0 degree and is less than or equal to 40 degrees, the included angle between the tangent plane of one point on the connecting plane of the concave structure and the side surface and a horizontal line is beta, and beta is more than or equal to 0 degree and is less than or equal to 30 degrees. The concave structure of the invention has limited draft angle, which ensures normal production and no excessive stress concentration.

The diameter of the inscribed circle on the upper surface of the blade body is D, in | M_nM′_nUnder | +0 condition, the center line 00' of the blade body in the thickness direction and the straight line l on the corresponding section_nHas a minimum vertical distance of d_minAnd 10% of D is not more than D_minLess than or equal to 30 percent of D. The arrangement of the invention is such that the depth of the concave structure 6 does not affect the strength of the cutting insert.

The parallel plane with the distance h from the bottom surface is used for cutting at least one section of the matching structure of the blade body and the cutter body, and 0 < | M exists_xN_x|_min≦ 0.3, and 0 < | M 'in at least one planar section'_yN′_y|_minLess than or equal to 0.3, wherein x and y are positive integers. The arrangement of the invention ensures that the anti-rotation effect cannot be achieved due to overlarge clearance.

The cutter body is provided with a mounting groove for mounting the cutting insert, the mounting groove including a positioning surface for mating with a bottom surface of the insert body; the maximum vertical distance from any point of the matching structure protruding out of the positioning surface part of the cutter body to the positioning surface of the cutter body is Z, and Z is more than or equal to 10% and less than or equal to 70% H. The height of the inventive mating structure 8 after assembly cannot be higher than the height of the concave structure 6

The cross-sectional shape of the concave structure 6 of this embodiment is trapezoidal; the matching structure 8 is a matching wedge block; the upper surface 2 is circular in shape.

The invention relates to a cutting processing tool, which adopts an insert body 1, wherein more than two concave structures 6 are distributed between a side surface 3 and a bottom surface 4 of a cutting insert; and the number of the first and second electrodes,the maximum vertical distance between each point in the concave structure 6 and the bottom surface 4 is H, the cutting blade is cut by a parallel plane which is H away from the bottom surface, wherein H is more than or equal to 0 and less than or equal to H, and the intersection point of the concave structure 6 and the side surface in the section is M₀、M₀', passing M₀、M₀' two points of the straight line are l₀Forming a plurality of strips parallel to the cutting blade from the periphery to the center of the cutting blade₀Straight line l of₁，l₂，l₃……l_n… …, wherein l_nRepresenting the nth straight line, n being a non-negative integer, straight line l₁，l₂，l₃……l_n… … and the concave structure 6 respectively have an intersection point M₁、M₁’，M₂、M₂’，M₃、M₃’……M_n、M_n' … …, at least one | M is present in at least one of the parallel plane and the concave profile from the bottom surface_nM′_n|＞|M₀M′₀And | wherein n > 0. According to the structure, on one hand, the blade can be prevented from easily rotating during cutting, stable cutting and uniform abrasion of the blade are guaranteed, and the stability of cutting is further guaranteed; on the other hand, even under severe working conditions, the blade can be ensured not to fly out along the radial direction of the cutting tool under the condition of screw fracture or blade damage, so that the damage to personnel and equipment can be prevented, and the safety of cutting processing is improved; furthermore, precise control of the indexing position and number of indexing of the cutting insert is also achieved. The concave structure 6 of the present invention can apply a force to the insert tangentially along the cutting edge of the insert, preventing the cutting insert from spinning during machining. The concave structure 6 and the matching structure 8 exert acting force in the diameter direction of the cutting blade, so that the cutting blade cannot fly out or randomly splash along the radial direction of the cutting tool under the conditions that the screw 9 is accidentally broken, the cutting blade is broken and the like,

example two

Referring to fig. 12 to 18, a cutting tool according to the present invention is different from the first embodiment in that the cross-sectional shape of the concave structure 6 is a circular shape with a small opening; the matching structure 8 is a matching screw 82 fixed on the positioning surface of the cutter body.

EXAMPLE III

Referring to fig. 19 to 20, a cutting tool according to the present invention is different from the first embodiment in that the upper surface 2 has a square shape.

Example four

Referring to fig. 21 to 22, a cutting tool according to the present invention is different from the first embodiment in that the upper surface 2 has a hexagonal shape.

The foregoing is considered as illustrative of the preferred embodiments of the invention and is not to be construed as limiting the invention in any way. Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make many possible variations and modifications to the disclosed embodiments, or equivalent modifications, without departing from the scope of the disclosed embodiments. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention should fall within the protection scope of the technical scheme of the present invention, unless the technical spirit of the present invention departs from the content of the technical scheme of the present invention.

Claims

1. A cutting tool includes a cutting insert and a cutter body; the cutting blade is mounted on the cutter body; the cutting insert includes an insert body; the insert body comprises an upper surface, a bottom surface, and sides; the upper surface and the side surface are intersected and transited to form a cutting edge, the upper surface is a front cutter surface, and the side surface is a rear cutter surface; the method is characterized in that: the insert body has more than two concave structures distributed between the side surface and the bottom surface of the cutting insert; the maximum vertical distance between each point in the concave structure and the bottom surface is H, the cutting blade is cut by a parallel plane which is H away from the bottom surface, wherein H is more than or equal to 0 and less than or equal to H, and the intersection point of the concave structure and the side surface in the section is M₀、M₀', passing M₀、M₀' two points of the straight line are l₀Forming a plurality of strips parallel to the cutting blade from the periphery to the center of the cutting blade₀Straight line l of₁，l₂，l₃……l_n… …, wherein l_nRepresenting the nth straight line, n being a non-negative integer, straight line l₁，l₂，l₃……l_n… … and the intersection points of the concave structures are M₁、M₁’，M₂、M₂’，M₃、M₃’……M_n、M_n' … …, at least one | M is present in at least one of the parallel plane and the concave profile from the bottom surface_nM′_n|＞|M₀M′₀And | wherein n > 0.

2. The cutting tool of claim 1, wherein: the cutter body is provided with a matching structure for matching with the concave structure of the cutting blade; cutting the matching structure of the cutting blade and the cutter body by the parallel plane with the distance h from the bottom surface, and passing through the intersection point M of the concave structure and the side surface₀、M₀' line l₀The intersection point with the matching structure is N₀、N₀', said innumerable strips in the direction from the periphery to the center of the cutting insert are parallel to l₀Straight line l of₁，l₂，l₃……l_n… …, and the intersection points with the matching structures are respectively N₁、N₁’，N₂、N₂’，N₃、N₃’……N_n、N_n' … … if there is no intersection point

3. The cutting tool of claim 2, wherein: setting up

Is a positive vector, then each section

Are all positive vectors, and are,

are all negative vectors, and | M_nN_n|＞0，|M′_nN′_nAnd | is greater than 0, wherein n is greater than or equal to 0.

4. The cutting tool of claim 3, wherein: the parallel plane h away from the bottom surface cuts open the matching structure of the blade body and the cutter body and has a straight line k₀Perpendicular to the straight line l₀And intersects the left side of the concave structure and the leftmost side of the mating structure at an intersection point X with the concave structure₀、X₀', the intersection point with the matching structure is Y₀、Y₀’，|X₀X′₀|＞0,|Y₀Y′₀0, forming innumerable strips parallel to k from left to right₀Straight line k of₁，k₂，k₃……k_n… …, wherein k_nRepresenting the nth straight line, n being a non-negative integer, straight line k₁，k₂，k₃……k_n… …, the concave structure and the line l₀The intersection points of the formed closed spaces are X respectively₁、X₁’，X₂、X₂’，X₃、X₃’……X_n、X_n' … …, the mating structure and the line l₀The intersection points of the formed closed spaces are respectively Y₁、Y₁’，Y₂、Y₂’，Y₃、Y₃’……Y_n、Y_n', up to | Y_nY′_n0, where n ≠ 0, and each profile is | X_nX′_n|＞|Y_nY′_nWherein n is more than or equal to 0.

5. The cutting tool of claim 1, wherein: the maximum distance between the cutting edge and the bottom surface of the blade body is S, and H is more than or equal to 10% and less than or equal to 60% S.

6. The cutting tool of claim 1, wherein: the included angle between the tangent plane of one point on the connecting plane of the concave structure and the bottom surface and a vertical line passing through the point is alpha, alpha is more than or equal to 0 degree and is less than or equal to 40 degrees, the included angle between the tangent plane of one point on the connecting plane of the concave structure and the side surface and a horizontal line is beta, and beta is more than or equal to 0 degree and is less than or equal to 30 degrees.

7. The cutting tool of claim 4, wherein: the diameter of the inscribed circle on the upper surface of the blade body is D

Under the condition of (1), the center line of the blade body in the thickness direction and a straight line l on the corresponding section_nHas a minimum vertical distance of d_minAnd 10% of D is not more than D_min≤30％D。

8. The cutting tool of claim 7, wherein: the parallel plane with the distance h from the bottom surface is used for cutting at least one section of the matching structure of the blade body and the cutter body, and 0 < | M exists_nN_n|_min≦ 0.3, and 0 < | M 'in at least one planar section'_yN′_y|_minLess than or equal to 0.3, wherein x and y are positive integers.

9. The cutting tool of claim 1, wherein: the cutter body is provided with a mounting groove for mounting the cutting insert, the mounting groove including a positioning surface for mating with a bottom surface of the insert body; the maximum vertical distance from any point of the matching structure protruding out of the positioning surface part of the cutter body to the positioning surface of the cutter body is Z, and Z is more than or equal to 10% and less than or equal to 70% H.

10. The cutting tool of claim 1, wherein: the concave structural cross-sectional shape includes, but is not limited to, trapezoidal, circular, or irregular; the mating structure includes, but is not limited to, a mating wedge or a mating screw; the upper surface shape includes, but is not limited to, circular or polygonal.