Double-sided cutting blade and cutting tool

Abstract

The invention relates to the technical field of cutting tools, and provides a double-sided cutting blade and a cutting tool, the double-sided cutting blade has the cutting characteristics of a double-sided positive blade with a special longitudinal side surface structure, and can reasonably meet the good machining side surface quality, ensure low cutting force and guide the cutting forming direction, so that the cutting becomes more smooth and stable, and the cutting efficiency is improved. Longitudinal installation support is provided, an installation face is separated from a cutting rear cutter face, mutual interference is avoided, and guarantee is provided for implementation of safe and reliable cutting and stable installation.

Description

Technical Field

[0001] The invention belongs to the technical field of cutting tools, in particular to a double-sided cutting blade and a cutting tool. Background Art

[0002] With the popularity of high-power spindle machine tools, more and more customers need to meet large cutting parameters, pursue high metal removal rate to achieve high-efficiency cutting, and at the same time have reliable clamping, stable cutting, and excellent processing performance. Therefore, the development of cutting tools with stable and reliable clamping and low cutting force has become particularly important. Summary of the invention

[0003] In order to solve the problems existing in the prior art, the main purpose of the present invention is to provide a double-sided cutting insert and a cutting tool.

[0004] To solve the above technical problems, according to one aspect of the present invention, the present invention provides the following technical solutions: A double-sided cutting blade, rotationally symmetrical relative to the Y axis; comprising: An upper end surface, a lower end surface arranged opposite to the upper end surface, and a side surface connecting the upper end surface and the lower end surface; The side surfaces include transverse side surfaces, longitudinal side surfaces, and corner side surfaces between adjacent transverse side surfaces and longitudinal side surfaces: The transverse side includes a primary transverse side and a secondary transverse side; The longitudinal side surface includes a main longitudinal side surface, wherein the main longitudinal side surface includes at least a first main longitudinal side surface, a second main longitudinal side surface, a third main longitudinal side surface, a fourth main longitudinal side surface and a fifth main longitudinal side surface in sequence from the upper end surface to the lower end surface along the Z-axis direction; The first main longitudinal side surface is adjacent to the second main longitudinal side surface in the Z-axis direction; The second main longitudinal side surface and the fourth main longitudinal side surface are separated by the third main longitudinal side surface in the X-axis direction, and the second main longitudinal side surface and the fourth main longitudinal side surface are parallel to the Z-axis; The fourth main longitudinal side surface is adjacent to the fifth main longitudinal side surface in the Z-axis direction.

[0005] As a preferred embodiment of a double-sided cutting blade of the present invention, the main longitudinal side surface also includes a sixth main longitudinal side surface and a seventh main longitudinal side surface; the sixth main longitudinal side surface and the seventh main longitudinal side surface are respectively located at two diagonal portions of the main longitudinal side surface and are neither adjacent nor connected.

[0006] As a preferred embodiment of a double-sided cutting insert of the present invention, wherein: along the X-axis direction from the main transverse side surface to the secondary transverse side surface, at least the second main longitudinal side surface and the sixth main longitudinal side surface are arranged in sequence on the main longitudinal side surface.

[0007] As a preferred embodiment of a double-sided cutting insert of the present invention, wherein: along the X-axis direction from the secondary transverse side surface to the main transverse side surface, at least a fourth main longitudinal side surface and a seventh main longitudinal side surface are sequentially arranged on the main longitudinal side surface.

[0008] As a preferred embodiment of a double-sided cutting blade of the present invention, in which: in a cross section perpendicular to the Z axis, the sixth main longitudinal side has an angle θ with the second main longitudinal side, the sixth main longitudinal side is inclined relative to the second main longitudinal side in a direction closer to the center of the cutting blade, and the second main longitudinal side is at a distance K1 from the center of the cutting blade.

[0009] As a preferred embodiment of a double-sided cutting blade of the present invention, in which: in a cross section perpendicular to the Z axis, the seventh main longitudinal side has an angle θ with the fourth main longitudinal side, the seventh main longitudinal side is inclined relative to the fourth main longitudinal side in a direction closer to the center of the cutting blade, and the fourth main longitudinal side is at a distance K2 from the center of the cutting blade.

[0010] As a preferred embodiment of a double-sided cutting blade of the present invention, the third main longitudinal side surface is located approximately in the middle of the main longitudinal side surface, in a cross section perpendicular to the Z axis, the third main longitudinal side surface is parallel to the X axis and perpendicular to the Y axis, and the third main longitudinal side surface is at a distance K from the center of the cutting blade.

[0011] As a preferred embodiment of a double-sided cutting insert of the present invention, wherein: 0°<θ≤40°, preferably 4°≤θ≤8°; K1>K, and K2>K; 0.9≤K:K1<1.

[0012] As a preferred embodiment of a double-sided cutting blade of the present invention, the sixth main longitudinal side surface and the seventh main longitudinal side surface are respectively located on both sides of the third main longitudinal side surface, wherein the sixth main longitudinal side surface is inclined relative to the third main longitudinal side surface in a direction closer to the center of the cutting blade, and the seventh main longitudinal side surface is inclined relative to the third main longitudinal side surface in a direction closer to the center of the cutting blade.

[0013] As a preferred embodiment of a double-sided cutting blade of the present invention, wherein: along the Z-axis direction from the upper end face to the lower end face, the main longitudinal side face is arranged in sequence on the side adjacent to the main transverse side face: a first main longitudinal side face inclined downward in the direction close to the center of the cutting blade, a second main longitudinal side face parallel to the Z-axis and not inclined, a second secondary transition face of the seventh main longitudinal side face inclined downward in the direction close to the center of the cutting blade, and a second secondary side face of the seventh main longitudinal side face parallel to the Z-axis.

[0014] As a preferred embodiment of a double-sided cutting blade of the present invention, wherein: along the Z-axis direction from the upper end face to the lower end face, the main longitudinal side face is arranged in sequence on the side adjacent to the main transverse side face: a first main longitudinal side face inclined downward in the direction close to the center of the cutting blade, a second main longitudinal side face parallel to the Z-axis and not inclined, a second secondary transition face of the seventh main longitudinal side face inclined downward in the direction close to the center of the cutting blade, a third main longitudinal side face inclined as a whole in the direction close to the center of the cutting blade, and a second secondary side face of the seventh main longitudinal side face parallel to the Z-axis.

[0015] As a preferred embodiment of a double-sided cutting blade of the present invention, wherein: along the Z-axis direction, from the upper end face to the lower end face, the main longitudinal side portion adjacent to the main transverse side face and the main longitudinal side portion adjacent to the secondary transverse side face are rotationally symmetrical 180° about the Y-axis.

[0016] As a preferred embodiment of a double-sided cutting blade of the present invention, the first main longitudinal side surface is rotationally symmetrical with the fifth main longitudinal side surface about the Y axis and are not coplanar, the sixth main longitudinal side surface is rotationally symmetrical with the seventh main longitudinal side surface about the Y axis and are not coplanar, and the second main longitudinal side surface is rotationally symmetrical with the fourth main longitudinal side surface about the Y axis and are not connected.

[0017] As a preferred embodiment of a double-sided cutting blade of the present invention, when looking down at the upper end face from the Z-axis direction, the fifth main longitudinal side surface and the sixth main longitudinal side surface are visible, a small part of the third main longitudinal side surface is visible or completely invisible, and the first main longitudinal side surface, the second main longitudinal side surface, the fourth main longitudinal side surface and the seventh main longitudinal side surface are invisible.

[0018] As a preferred embodiment of a double-sided cutting insert of the present invention, when looking down at the upper end surface from the Z-axis direction, the seventh main longitudinal side surface close to the main transverse side surface has a distance H1 closer to the center of the cutting insert, 0

[0019] As a preferred solution of a double-sided cutting insert of the present invention, when viewed from the main longitudinal side, along the Z-axis direction, there is a maximum height H0 between the upper end surface and the lower end surface.

[0020] As a preferred embodiment of a double-sided cutting blade of the present invention, when viewed from the upper end surface, along the Y-axis direction, there is a maximum length H2 between the main longitudinal side surface and the secondary longitudinal side surface on the side close to the corner side surface, and there is a minimum length H between the main longitudinal side surface and the secondary longitudinal side surface in the middle area of ​​the cutting blade, wherein H2>H.

[0021] ​As a preferred embodiment of a double-sided cutting blade of the present invention, in which: in a cross section perpendicular to the X-axis and parallel to the Y-axis, viewed from the main transverse side to the secondary transverse side, the first main longitudinal side has a thickness H10 that gradually decreases along the Y-axis direction, and the fifth main longitudinal side has a thickness H12 that gradually increases along the Y-axis direction.

[0022] As a preferred embodiment of a double-sided cutting blade of the present invention, in which: in a cross section perpendicular to the X-axis and parallel to the Y-axis, viewed from the main lateral side to the secondary lateral side, the third main longitudinal side has, in sequence, a gradually increasing area, a constant area, and a gradually decreasing area, B1<B0, B0>B2, and 0<B0<H0 / 3.

[0023] As a preferred embodiment of a double-sided cutting blade of the present invention, in which: in a cross section perpendicular to the X-axis and parallel to the Y-axis, viewed from the main transverse side to the secondary transverse side, the seventh main longitudinal side has a distance H3 closer to the center of the cutting blade relative to the first main longitudinal side, and the sixth main longitudinal side has a distance H4 closer to the center of the cutting blade relative to the fifth main longitudinal side, wherein 0<H3

[0024] As a preferred embodiment of a double-sided cutting blade of the present invention, when looking down at the main longitudinal side from the Y-axis direction, the main longitudinal side has a maximum width W between the main transverse side and the secondary transverse side, and has a minimum width W3 between the two corner sides, wherein 0.1<W-W3<2.2.

[0025] As a preferred embodiment of a double-sided cutting blade of the present invention, when looking down at the main longitudinal side from the Y-axis direction, the main longitudinal side has a maximum width W between the main transverse side and the secondary transverse side, and the intersection boundary of the second main longitudinal side and the sixth main longitudinal side is closer to the secondary transverse side relative to the Z-axis and has a spacing W1 with the Z-axis, wherein 0.001≤W1:W≤0.45.

[0026] As a preferred embodiment of a double-sided cutting insert of the present invention, wherein: the corner side surface comprises a plurality of first corner side surfaces and a plurality of fourth corner side surfaces; The blade portion formed at the intersection of the side surface and the upper end surface includes a main blade, and the main blade includes at least: a main cutting edge, a main corner cutting edge, a secondary cutting edge, and a secondary corner cutting edge, wherein the main cutting edge is arranged at the intersection of the main transverse side surface and the upper end surface, the main corner cutting edge is arranged at the intersection of the first corner side surface and the upper end surface, the secondary cutting edge is arranged at the intersection of the main longitudinal side surface adjacent to one side of the first corner side surface and the upper end surface, and the secondary corner cutting edge is arranged at the intersection of the fourth corner side surface and the upper end surface; Wherein, two ends of the main cutting edge are respectively connected to the main corner cutting edge and the secondary corner cutting edge; ​Looking down at the upper end face from the Z-axis direction, the main cutting edge is convex; Looking down at the main lateral side from the X-axis direction, the distance between the main cutting edge in the Z-axis direction and the Y-axis first decreases and then increases from the main corner cutting edge to the secondary corner cutting edge.

[0027] As a preferred embodiment of a double-sided cutting blade of the present invention, the blade portion further comprises a secondary edge, which is arranged at the intersection of the main longitudinal side surface and the upper end surface adjacent to the fourth corner side surface, and the two ends of the secondary cutting edge are respectively connected to the main corner cutting edge and the secondary edge. When the main longitudinal side surface is viewed from the Y-axis direction, the secondary cutting edge is inclined in a direction closer to the X-axis from the main transverse side surface to the secondary transverse side surface and has an angle α1 with the X-axis, and the secondary edge has an angle α2 with the X-axis, wherein 0°<α1≤35°, 0°≤α2≤30°, and α1≥α2.

[0028] To solve the above technical problem, according to another aspect of the present invention, the present invention provides the following technical solution: A cutting tool comprising: A cutter body and the aforementioned cutting blade; The upper end surface of the cutting blade is provided with an upper mounting surface, and the lower end surface is provided with a lower mounting surface; The blade body has at least one blade particle groove, the blade particle groove includes a fourth longitudinal support surface and a third support surface, the fourth longitudinal support surface matches the sixth main longitudinal side surface or the seventh main longitudinal side surface, and the third support surface matches the mounting surface; The fourth longitudinal support surface is arranged on a side away from the cutting blade along the rotation axis direction of the cutter body and is inclined toward the inside of the cutter particle groove.

[0029] The beneficial effects of the present invention are as follows: The present invention proposes a double-sided cutting blade and a cutting tool, which have the cutting characteristics of a double-sided positive blade with a special longitudinal side structure, can reasonably meet the requirements of good processing side quality, ensure low cutting force and the guiding effect of the cutting direction, thereby making the cutting smoother and more stable, providing longitudinal installation support, and distinguishing the installation surface from the cutting back tool face without interfering with each other, thereby providing guarantees for the implementation of safe and reliable cutting, easy-to-manufacture economical tool structure and stable installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0031] Figure 1The structure of the double-sided cutting blade of the present invention is shown in FIG. Figure 1 ; Figure 2 The structure of the double-sided cutting blade of the present invention is shown in FIG. Figure 2 ; Figure 3 The structure of the double-sided cutting blade of the present invention is shown in FIG. Figure 3 ; Figure 4 It is a schematic structural diagram of the lateral side of the double-sided cutting insert of the present invention; Figure 5 It is a schematic structural diagram of the end surface of the double-sided cutting blade of the present invention; Figure 6 It is a schematic structural diagram of the longitudinal side of the double-sided cutting insert of the present invention; Figure 7 for Figure 5 Section along BI-BI; Figure 8 for Figure 5 The cross section along AZ-AZ in the middle; Fig. 9 for Figure 5 Section along BH-BH; Fig.10 for Figure 6 Cross-section along the BG-BG; Fig.11 for Figure 6 The cross section along BC-BC in the middle; Fig.12 for Figure 6 Section along the middle section BF-BF; Fig.13 for Figure 6 Sectional view along BB-BB; Fig.14 It is a schematic structural diagram of the cutting tool of the present invention.

[0032] The meanings of the reference numerals in the figure are: 100: cutting blade; 200: cutter body; 300: cutter; 1: end face; 2: blade hole; 3: lateral side; 5: main edge; 6: secondary edge; 7: corner side; X-axis: a virtual horizontal axis that is perpendicular to the center of the horizontal side and runs through the horizontal side; Y axis: a virtual longitudinal axis perpendicular to the center of the longitudinal side and running through the longitudinal side; Z axis: vertical to the center of the end face and the direction of the virtual axis that runs through the end face; 11: upper end surface; 12: lower end surface; 31: major transverse side; 32: minor transverse side; 41: main longitudinal side; 42: secondary longitudinal side; 51: main cutting edge; 52: main corner cutting edge; 53: secondary cutting edge; 54: secondary corner cutting edge; 71: first corner side; 72: second corner side; 73: third corner side; 74: fourth corner side; 111: upper mounting surface; 112: main front cutting surface; 113: corner front cutting surface; 114: auxiliary front cutting surface; 115: auxiliary front surface; 116: chip return surface; 121: lower mounting surface; 411: first main longitudinal side surface; 412: second main longitudinal side surface; 413: third main longitudinal side surface; 414: fourth main longitudinal side surface; 415: fifth main longitudinal side surface; 416: sixth main longitudinal side surface; 417: seventh main longitudinal side surface; 4161: first secondary side surface; 4162: first secondary transition surface; 4171: second secondary side surface; 4172: second secondary transition surface; 201: knife particle groove; 2013: third supporting surface; 2014: fourth longitudinal supporting surface.

[0033] Explanation of the arrow end marks in the figure: None: indicates the entire area of ​​the orientation; ~: indicates the whole, such as cutting blade, tool body, tool; Solid arrows: represent the surface within the small area; Solid black dot: indicates the specific surface; Hollow circle: represents line; Solid square: indicates the specific line.

[0034] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0035] The following will be described clearly and completely in conjunction with the technical solutions in the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] The present invention provides a double-sided cutting insert and a cutting tool, such as Figure 1-13 As shown, a double-sided cutting blade is rotationally symmetrical relative to the Y axis; comprising: An upper end surface 11, a lower end surface 12 disposed opposite to the upper end surface 11, and a side surface connecting the upper end surface 11 and the lower end surface 12; The side surface includes a transverse side surface 3, a longitudinal side surface, and a corner side surface 7 located between adjacent transverse side surfaces 3 and longitudinal side surfaces: The transverse side 3 comprises a main transverse side 31 and a secondary transverse side 32; The longitudinal side surface includes a main longitudinal side surface 41, wherein the main longitudinal side surface 41 includes at least a first main longitudinal side surface 411, a second main longitudinal side surface 412, a third main longitudinal side surface 413, a fourth main longitudinal side surface 414 and a fifth main longitudinal side surface 415 in sequence from the upper end surface 11 to the lower end surface 12 along the Z-axis direction; The first main longitudinal side surface 411 is adjacent to the second main longitudinal side surface 412 in the Z-axis direction; The second main longitudinal side surface 412 and the fourth main longitudinal side surface 414 are separated by the third main longitudinal side surface 413 in the X-axis direction, and the second main longitudinal side surface 412 and the fourth main longitudinal side surface 414 are parallel to the Z-axis; The fourth main longitudinal side surface 414 is adjacent to the fifth main longitudinal side surface 415 in the Z-axis direction.

[0037] The cutting blade 100 of the present invention has a specially arranged longitudinal structure, that is, the side surface has at least a characteristic surface that crosses the longitudinal side surface between the two end surfaces 1 in the Z-axis direction; the five characteristic surfaces are not used for installation purposes, among which the first main longitudinal side surface 411 and the fifth main longitudinal side surface 415 are main back tool surfaces with positive back angles, which provide a guarantee for realizing the cutting force; the second main longitudinal side surface 412 and the fourth main longitudinal side surface 414 are secondary back tool surfaces that are closer to the center of the cutting blade 100 in the Y-axis direction and perpendicular to the end surface, which not only reduces the difficulty and cost of production and manufacturing, but also further increases the avoidance space required by the cutting edge where the longitudinal side surface is located during cutting, providing a guarantee for the implementation of safe and reliable cutting; the third main longitudinal side surface 413 can provide a parting path area without affecting the appearance and use of the blade, making the manufacturing simple and easy to implement, and at the same time plays the role of separating the second main longitudinal side surface 412 and the fourth main longitudinal side surface 414, which can effectively disperse stress, avoid stress concentration and aggravate blade deformation, thereby affecting the use and life of the tool and even the surface quality of the workpiece.

[0038] In one embodiment of the present invention, the main longitudinal side surface 41 further includes a sixth main longitudinal side surface 416 and a seventh main longitudinal side surface 417; the sixth main longitudinal side surface 416 and the seventh main longitudinal side surface 417 are respectively located at two diagonal positions of the main longitudinal side surface 41, and are neither adjacent nor connected. Providing longitudinal installation support, providing a distinction between the installation surface and the cutting back face, and not interfering with each other, providing a guarantee for the implementation of safe and reliable cutting and stable installation.

[0039] In one embodiment of the present invention, along the X-axis direction, from the main transverse side 31 to the secondary transverse side 32, at least the second main longitudinal side 412 and the sixth main longitudinal side 416 are arranged in sequence on the main longitudinal side 41; at least the fourth main longitudinal side 414 and the seventh main longitudinal side 417 are arranged in sequence on the main longitudinal side 41. The detailed structural features of the main longitudinal side 41 are further limited to ensure the safe and reliable cutting and stable installation of the blade.

[0040] In one embodiment of the present invention, in a cross section perpendicular to the Z axis, the sixth main longitudinal side surface 416 has an angle θ with the second main longitudinal side surface 412, the sixth main longitudinal side surface 416 is inclined relative to the second main longitudinal side surface 412 in a direction closer to the center of the cutting blade 100, and the second main longitudinal side surface 412 is at a distance K1 from the center of the cutting blade 100. The position and structural relationship between the sixth main longitudinal side surface 416 providing longitudinal installation and the second main longitudinal side surface 412 providing a secondary back face for longitudinal cutting is further defined. The setting of a certain inclination angle θ cleverly forms an envelope of a certain angle on its mounting surface in the longitudinal side orientation, which is conducive to the stable and reliable installation of the blade in the blade particle groove, can effectively reduce the risk of displacement of the blade during cutting, and further improve the life of the tool.

[0041] In one embodiment of the present invention, in a cross section perpendicular to the Z axis, the seventh main longitudinal side surface 417 has an angle θ with the fourth main longitudinal side surface 414, the seventh main longitudinal side surface 417 is inclined relative to the fourth main longitudinal side surface 414 in a direction closer to the center of the cutting blade 100, and the fourth main longitudinal side surface 414 is at a distance K2 from the center of the cutting blade 100. The position and structural relationship between the seventh main longitudinal side surface 417 providing longitudinal installation and the fourth main longitudinal side surface 414 providing a secondary back face for longitudinal cutting is further defined. The setting of a certain inclination angle θ cleverly forms an envelope of a certain angle on its mounting surface in the longitudinal side orientation, which is conducive to the stable and reliable installation of the blade in the blade particle groove, can effectively reduce the risk of displacement of the blade during cutting, and further improve the life of the tool.

[0042] In one embodiment of the present invention, the third main longitudinal side surface 413 is located at a substantially middle position of the main longitudinal side surface 41, and in a cross section perpendicular to the Z axis, the third main longitudinal side surface 413 is parallel to the X axis and perpendicular to the Y axis, and the third main longitudinal side surface 413 is at a distance K from the center of the cutting insert 100. The sixth main longitudinal side surface 416 and the seventh main longitudinal side surface 417 are respectively located on both sides of the third main longitudinal side surface 413, wherein the sixth main longitudinal side surface 416 is inclined relative to the third main longitudinal side surface 413 in a direction closer to the center of the cutting insert 100, and the seventh main longitudinal side surface 417 is inclined relative to the third main longitudinal side surface 413 in a direction closer to the center of the cutting insert 100. The position and structural relationship between the seventh main longitudinal side surface 417 and the sixth main longitudinal side surface 416 and the third main longitudinal side surface 413 is further defined. The clever structural setting can realize the setting of the parting area inside it, avoiding the adverse effects of burrs and poor joints at the parting on the installation and use of the blade. At the same time, because it is set parallel to the X-axis, such a setting is beneficial to the blade production and manufacturing. It can easily separate the pre-sintered compact from the mold, and the left and right sides are provided with areas inclined to the center of the blade to further provide a larger axial space for the blade when it is installed in the cutter body, which can effectively reduce the risk of interference between the blade and the cutter body during cutting, which is beneficial to the accessibility of the cutting process and further improves the life of the tool and its economy.

[0043] As a preferred embodiment of a double-sided cutting blade of the present invention, wherein: 0°<θ≤40°, preferably 4°≤θ≤8°, the angle θ between the seventh main longitudinal side surface 417 and the fourth main longitudinal side surface 414 is further optimized. Effect: The setting of a certain inclination angle θ cleverly forms an envelope of a certain angle on the mounting surface in the longitudinal side surface orientation, and this setting is conducive to the stable and reliable installation of the blade in the blade particle groove, which can effectively reduce the risk of displacement of the blade during cutting, and further improve the life of the tool.

[0044] As a preferred solution of a double-sided cutting blade of the present invention, wherein: K1>K, and K2>K; 0.9≤K:K1<1, it provides convenience and reliability for pressing demolding or parting or molding while reducing internal stress concentration without affecting the strength of the cutting blade.

[0045] In one embodiment of the present invention, along the Z-axis direction from the upper end face 11 to the lower end face 12, the main longitudinal side face 41 is arranged in sequence on the side adjacent to the main lateral side face 31: a first main longitudinal side face 411 inclined downward in the direction close to the center of the cutting blade 100, a second main longitudinal side face 412 parallel to the Z-axis and not inclined, a second secondary transition face 4172 of the seventh main longitudinal side face 417 inclined downward in the direction close to the center of the cutting blade 100, and a second secondary side face 4171 of the seventh main longitudinal side face 417 parallel to the Z-axis. Along the Z-axis direction from the upper end face 11 to the lower end face 12, the main longitudinal side face 41 is arranged in sequence on the side adjacent to the main lateral side face 31: a first main longitudinal side face 411 inclined downward in the direction close to the center of the cutting blade 100, a second main longitudinal side face 412 parallel to the Z-axis and not inclined, a second secondary transition face 4172 of the seventh main longitudinal side face 417 inclined downward in the direction close to the center of the cutting blade 100, a third main longitudinal side face 413 inclined as a whole in the direction close to the center of the cutting blade 100, and a second secondary side face 4171 of the seventh main longitudinal side face 417 parallel to the Z-axis. The detailed features of the main longitudinal side surface 41 on the side close to the corner side surface 7 are further elaborated, and a first main longitudinal side surface 411 structure is set to be inclined downward close to the center of the cutting blade 100, so that the cutting blade 100 has a sharp axial secondary cutting edge 53 and a positive axial angle, which plays a role in reducing cutting force and makes the cutting blade 100 have a more suitable working edge inclination angle; a second main longitudinal side surface 412 that is not inclined at the vertical end face 1 and a seventh main longitudinal side surface 417 that is inclined downward close to the center of the cutting blade 100 are set, so that the cutting blade 100 has a wider axial space to provide a guarantee for light and stable cutting, and at the same time greatly reduce the risk of the back tool face interfering with the workpiece during cutting; a third main longitudinal side surface 413 structure that is inclined as a whole close to the center of the cutting blade 100 is set, which provides convenience and reliability for demolding or parting or parting while reducing internal stress concentration; a seventh main longitudinal side surface 417 structure that is not inclined toward the vertical end face 1 is set, which can further greatly reduce the risk of interference with the workpiece and provide a specially set longitudinal side mounting surface when cutting using the other end face 1 side.

[0046] In one embodiment of the present invention, along the Z-axis direction, from the upper end face 11 to the lower end face 12, the main longitudinal side face 41 portion adjacent to the main transverse side face 31 and the main longitudinal side face 41 portion adjacent to the secondary transverse side face 32 are rotationally symmetrical about the Y-axis by 180°. The detailed features of the main longitudinal side face 41 are reasonably arranged to achieve the unique characteristics of indexable, double-sided positive and negative cutting blades, the longitudinal side mounting structure has a certain anti-running function, and the mold separation or demoulding or press molding is simple and easy to achieve with high precision.

[0047] In one embodiment of the present invention, the first main longitudinal side surface 411 and the fifth main longitudinal side surface 415 are rotationally symmetrical about the Y axis and are not coplanar, the sixth main longitudinal side surface 416 and the seventh main longitudinal side surface 417 are rotationally symmetrical about the Y axis and are not coplanar (the sixth main longitudinal side surface 416 includes the first auxiliary side surface 4161 and the first auxiliary transition surface 4162), and the second main longitudinal side surface 412 and the fourth main longitudinal side surface 414 are rotationally symmetrical about the Y axis and are not connected. The main longitudinal side surface 41 has the characteristics of rotational symmetry about the Y axis and the characteristics of the third main longitudinal side surface 413 arranged along the X axis. The double-sided cutting blade has the unique characteristics of both positive and negative cutting blades, the longitudinal side mounting structure has a certain anti-running function, and the mold separation or demolding or press molding is simple and easy to achieve with high precision.

[0048] In one embodiment of the present invention, when looking down at the upper end face 11 from the Z-axis direction, the fifth main longitudinal side face 415 and the sixth main longitudinal side face 416 are visible, a small part of the third main longitudinal side face 413 is visible or completely invisible, and the first main longitudinal side face 411, the second main longitudinal side face 412, the fourth main longitudinal side face 414 and the seventh main longitudinal side face 417 are invisible. The main longitudinal side face 41 has a unique feature when viewed from the perspective along the Z-axis direction, and has the functions of reliable installation, low cutting force and low interference risk. The visible area can achieve low axial cutting force, and the invisible area can reduce the risk of interference of the back tool face with the workpiece during cutting.

[0049] In one embodiment of the present invention, when looking down at the upper end surface 11 from the Z-axis direction, the seventh main longitudinal side surface 417 close to the main transverse side surface 31 has a distance H1 closer to the center of the cutting insert 100, where 0

[0050] In one embodiment of the present invention, when viewed from the main longitudinal side 41, along the Z-axis direction, there is a maximum height H0 between the upper end face 11 and the lower end face 12. When viewed from the upper end face 11, along the Y-axis direction, there is a maximum length H2 between the main longitudinal side 41 and the secondary longitudinal side 42 on the side close to the corner side 7, and there is a minimum length H between the main longitudinal side 41 and the secondary longitudinal side 42 in the middle area of ​​the cutting insert 100, wherein H2>H. The unique features of the cutting insert 100 are further defined. The setting of the minimum length H in the middle area in the end view can make the secondary cutting edge 53 have a better finishing effect while protecting the secondary cutting edge 53 to avoid premature failure, thereby improving the cutting life and the quality of the machined surface.

[0051] ​In one embodiment of the present invention, in a cross section perpendicular to the X-axis and parallel to the Y-axis, from the main transverse side 31 to the secondary transverse side 32, the first main longitudinal side 411 has a thickness H10 that gradually decreases along the Y-axis direction, and the fifth main longitudinal side 415 has a thickness H12 that gradually increases along the Y-axis direction. The changing relationship and layout of each surface of the main longitudinal side 41 are defined. The setting of the special structure can meet the blade strength and low blade cutting force requirements at different cutting feed rates, and effectively balance the cutting performance and blade stability.

[0052] In one embodiment of the present invention, in a cross section perpendicular to the X-axis and parallel to the Y-axis, from the main transverse side 31 to the secondary transverse side 32, the third main longitudinal side 413 has a gradually increasing area B1 to B0, a constant area B0, and a gradually decreasing area B0 to B2, B1 < B0, B0 > B2, and 0 < B0 < H0 / 3. The characteristics of the third main longitudinal side 413 are defined to provide convenience and reliability for demolding or parting or parting of the cutting insert without affecting the strength of the cutting insert, while reducing internal stress concentration.

[0053] In one embodiment of the present invention, in a cross section perpendicular to the X-axis and parallel to the Y-axis, from the main transverse side 31 to the secondary transverse side 32, the seventh main longitudinal side 417 has a distance H3 closer to the center of the cutting blade 100 relative to the first main longitudinal side 411, and the sixth main longitudinal side 416 has a distance H4 closer to the center of the cutting blade 100 relative to the fifth main longitudinal side 415, wherein 0<H3

[0054] In one embodiment of the present invention, when looking down at the main longitudinal side 41 from the Y-axis direction, the main longitudinal side 41 has a maximum width W between the main transverse side 31 and the secondary transverse side 32, and has a minimum width W3 between the two corner sides 7, wherein 0.1<W-W3<2.2.

[0055] ​In one embodiment of the present invention, when the main longitudinal side 41 is viewed from the Y-axis, the main longitudinal side 41 has a maximum width W between the main transverse side 31 and the secondary transverse side 32, and the intersection boundary of the second main longitudinal side 412 and the sixth main longitudinal side 416 is closer to the secondary transverse side 32 relative to the Z-axis and has a spacing W1 with the Z-axis, wherein 0.001≤W1:W≤0.45. The size, shape, and position relationship of the sixth main longitudinal side 416 for side mounting are limited to ensure stable and reliable side mounting, and can adapt to cutting with different cutting parameters and working conditions according to the reasonable arrangement of relevant parameters, thereby obtaining low cutting force and high economy.

[0056] In one embodiment of the present invention, the corner side surface 7 includes a plurality of first corner side surfaces 71 and a plurality of fourth corner side surfaces 74; The cutting edge portion formed at the intersection of the side surface and the upper end surface 11 includes a main cutting edge 5, and the main cutting edge 5 includes at least: a main cutting edge 51, a main corner cutting edge 52, a secondary cutting edge 53, and a secondary corner cutting edge 54, wherein the main cutting edge 51 is arranged at the intersection of the main transverse side surface 31 and the upper end surface 11, and the main cutting edge 51 is formed by the intersection of the main transverse side surface 31 and the main front cutting surface 112, and the main corner cutting edge 52 is arranged at the intersection of the first corner side surface 71 and the upper end surface 11, and the main corner cutting edge 5 2 is formed by the intersection of the first corner side surface 71 and the corner front cutting surface 113, the secondary cutting edge 53 is arranged at the intersection of the main longitudinal side surface 41 and the upper end surface 11 on the side adjacent to the first corner side surface 71, the secondary cutting edge 53 is formed by the intersection of the main longitudinal side surface 41 and the secondary front cutting surface 114, and the secondary corner cutting edge 54 is arranged at the intersection of the fourth corner side surface 74 and the upper end surface 11; the upper end surface 11 is also provided with a chip return surface 116, which is formed by the upper end surface 11 being inclined toward the main cutting edge 51; Wherein, both ends of the main cutting edge 51 are connected to the main corner cutting edge 52 and the secondary corner cutting edge 54 respectively; Looking down at the upper end surface 11 from the Z-axis direction, the main cutting edge 51 is convex; Looking down at the main lateral side surface 31 from the X-axis direction, the distance between the main cutting edge 51 in the Z-axis direction and the Y-axis first decreases and then increases from the main corner cutting edge 52 toward the secondary corner cutting edge 54 .

[0057] The convex main cutting edge 51 and the special structural arrangement in which the main cutting edge 51 first decreases and then increases can reasonably meet the requirements of good processing side quality. The reduced part of the main cutting edge 51 can better ensure the guiding effect of low cutting force and cutting direction. The reversely increased part of the main cutting edge 51 can ensure the primary requirement of a stronger cutting edge at a larger cutting depth, thereby making the cutting smoother and more stable.

[0058] In one embodiment of the present invention, the blade portion further includes a secondary edge 6, which is disposed at the intersection of the main longitudinal side surface 41 and the upper end surface 11 adjacent to the fourth corner side surface 74. The secondary edge 6 is formed by the intersection of the main longitudinal side surface 41 and the secondary front surface 115. The two ends of the secondary cutting edge 53 are respectively connected to the main corner cutting edge 52 and the secondary edge 6. When the main longitudinal side surface 41 is viewed from the Y-axis direction, from the main transverse side surface 31 to the secondary transverse side surface 32, the secondary cutting edge 53 is inclined in a direction closer to the X-axis and has an angle α1 with the X-axis, and the secondary edge 6 has an angle α2 with the X-axis, wherein 0°<α1≤35°, 0°≤α2≤30°, and α1≥α2. The position and size relationship of the secondary cutting edge 53 and the secondary edge 6 are set to ensure stable and reliable side installation, and at the same time, the cutting of different cutting parameters and working conditions can be adapted according to the reasonable arrangement of relevant parameters, so as to obtain low cutting force and high economy.

[0059] The present invention also provides a cutting tool, such as Fig.14 As shown, including: A cutter body 200 and the cutting insert 100 described above; The upper end surface 11 of the cutting insert 100 is provided with an upper mounting surface 111 , and the lower end surface 12 is provided with a lower mounting surface 121 ; The blade body 200 has at least one blade particle groove 201, and the blade particle groove 201 includes a fourth longitudinal support surface 2014 and a third support surface 2013, the fourth longitudinal support surface 2014 matches the sixth main longitudinal side surface 416 or the seventh main longitudinal side surface 417, and the third support surface 2013 matches the upper mounting surface 111 and the lower mounting surface 121; The fourth longitudinal support surface 2014 is disposed on a side away from the cutting insert 100 along the rotation axis direction of the tool body 200 and is inclined toward the inside of the tool particle groove 201 .

[0060] The special blade groove structure is inclined toward the inside of the blade body 200. When the loaded blade tends to jump, the special structure of the tool will wrap the blade to prevent it from escaping, further enhancing the tool's ability to prevent jumping, stable installation and reliable cutting.

[0061] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention specification under the inventive concept of the present invention, or direct / indirect applications in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A double-sided cutting insert, characterized in that: Rotationally symmetric about the Y axis; including: An upper end surface (11), a lower end surface (12) arranged opposite to the upper end surface (11), and a side surface connecting the upper end surface (11) and the lower end surface (12); The side surface includes a transverse side surface (3), a longitudinal side surface and a corner side surface (7) located between adjacent transverse side surfaces (3) and longitudinal side surfaces: The transverse side (3) comprises a main transverse side (31) and a secondary transverse side (32); The longitudinal side surface comprises a main longitudinal side surface (41), wherein the main longitudinal side surface (41) comprises at least a first main longitudinal side surface (411), a second main longitudinal side surface (412), a third main longitudinal side surface (413), a fourth main longitudinal side surface (414) and a fifth main longitudinal side surface (415) in sequence from the upper end surface (11) to the lower end surface (12) along the Z-axis direction; The first main longitudinal side surface (411) is adjacent to the second main longitudinal side surface (412) in the Z-axis direction; The second main longitudinal side surface (412) and the fourth main longitudinal side surface (414) are separated by the third main longitudinal side surface (413) in the X-axis direction, and the second main longitudinal side surface (412) and the fourth main longitudinal side surface (414) are parallel to the Z-axis; The fourth main longitudinal side surface (414) and the fifth main longitudinal side surface (415) are adjacent to each other in the Z-axis direction.

2. The double-sided cutting insert according to claim 1, characterized in that The main longitudinal side surface (41) further includes a sixth main longitudinal side surface (416) and a seventh main longitudinal side surface (417); the sixth main longitudinal side surface (416) and the seventh main longitudinal side surface (417) are respectively located at two diagonal positions of the main longitudinal side surface (41) and are neither adjacent nor connected.

3. The double-sided cutting insert according to claim 2, characterized in that At least a second main longitudinal side surface (412) and a sixth main longitudinal side surface (416) are arranged in sequence on the main longitudinal side surface (41) from the main transverse side surface (31) to the secondary transverse side surface (32) along the X-axis direction; Along the X-axis direction, from the secondary transverse side (32) to the main transverse side (31), at least a fourth main longitudinal side (414) and a seventh main longitudinal side (417) are arranged in sequence on the main longitudinal side (41).

4. The double-sided cutting insert according to claim 2, characterized in that In a cross section perpendicular to the Z axis, the sixth main longitudinal side surface (416) has an angle θ with the second main longitudinal side surface (412), the sixth main longitudinal side surface (416) is inclined relative to the second main longitudinal side surface (412) in a direction closer to the center of the cutting insert (100), and the second main longitudinal side surface (412) is at a distance K1 from the center of the cutting insert (100); In a cross section perpendicular to the Z axis, the seventh main longitudinal side surface (417) has an angle θ with the fourth main longitudinal side surface (414), the seventh main longitudinal side surface (417) is inclined relative to the fourth main longitudinal side surface (414) in a direction closer to the center of the cutting insert (100), and the fourth main longitudinal side surface (414) is at a distance K2 from the center of the cutting insert (100); The third main longitudinal side (413) is located in the middle of the main longitudinal side (41). In the cross section perpendicular to the Z axis, the third main longitudinal side (413) is parallel to the X axis and perpendicular to the Y axis, and the third main longitudinal side (413) is at a distance K from the center of the cutting blade (100).

5. The double-sided cutting insert according to claim 4, characterized in that 0°<θ≤40°.

6. The double-sided cutting insert according to claim 5, characterized in that 4°≤θ≤8°.

7. The double-sided cutting insert according to claim 4, characterized in that K1>K, and K2>K.

8. The double-sided cutting insert according to claim 4, characterized in that 0.9≤K:K1<1.

9. The double-sided cutting insert according to claim 4, characterized in that The sixth main longitudinal side surface (416) and the seventh main longitudinal side surface (417) are respectively located on both sides of the third main longitudinal side surface (413), wherein the sixth main longitudinal side surface (416) is inclined relative to the third main longitudinal side surface (413) toward a direction closer to the center of the cutting blade (100), and the seventh main longitudinal side surface (417) is inclined relative to the third main longitudinal side surface (413) toward a direction closer to the center of the cutting blade (100).

10. The double-sided cutting insert according to claim 2, characterized in that Along the Z-axis direction from the upper end face (11) to the lower end face (12), the main longitudinal side face (41) is arranged in sequence on the side adjacent to the main transverse side face (31) to include a first main longitudinal side face (411) inclined downward in a direction close to the center of the cutting blade (100), a second main longitudinal side face (412) parallel to the Z-axis and not inclined, a second secondary transition face (4172) of the seventh main longitudinal side face (417) inclined downward in a direction close to the center of the cutting blade (100), and a second secondary side face (4171) of the seventh main longitudinal side face (417) parallel to the Z-axis.

11. The double-sided cutting insert according to claim 2, characterized in that Along the Z-axis direction from the upper end face (11) to the lower end face (12), the main longitudinal side face (41) is arranged in sequence on the side adjacent to the main transverse side face (31): the first main longitudinal side face (411) inclined downward in the direction close to the center of the cutting blade (100), the second main longitudinal side face (412) parallel to the Z-axis and not inclined, the second secondary transition face (4172) of the seventh main longitudinal side face (417) inclined downward in the direction close to the center of the cutting blade (100), the third main longitudinal side face (413) inclined as a whole in the direction close to the center of the cutting blade (100), and the second secondary side face (4171) of the seventh main longitudinal side face (417) parallel to the Z-axis.

12. The double-sided cutting insert according to claim 1, characterized in that Along the Z-axis direction, from the upper end face (11) to the lower end face (12), the main longitudinal side face (41) portion adjacent to the main transverse side face (31) and the main longitudinal side face (41) portion adjacent to the secondary transverse side face (32) are rotationally symmetrical 180° about the Y-axis.

13. The double-sided cutting insert according to claim 2, characterized in that The first main longitudinal side surface (411) and the fifth main longitudinal side surface (415) are rotationally symmetric about the Y axis and are not coplanar, the sixth main longitudinal side surface (416) and the seventh main longitudinal side surface (417) are rotationally symmetric about the Y axis and are not coplanar, and the second main longitudinal side surface (412) and the fourth main longitudinal side surface (414) are rotationally symmetric about the Y axis and are not connected; Looking down at the upper end surface (11) from the Z-axis direction, the fifth main longitudinal side surface (415) and the sixth main longitudinal side surface (416) are visible, a small part of the third main longitudinal side surface (413) is visible or completely invisible, and the first main longitudinal side surface (411), the second main longitudinal side surface (412), the fourth main longitudinal side surface (414) and the seventh main longitudinal side surface (417) are not visible.

14. The double-sided cutting insert according to claim 2, characterized in that Looking down at the upper end surface (11) from the Z-axis direction, the seventh main longitudinal side surface (417) close to the main transverse side surface (31) has a distance H1 closer to the center of the cutting blade (100), 0<H1<1.

15. The double-sided cutting insert according to claim 14, characterized in that When viewed from the main longitudinal side surface (41), along the Z-axis direction, a maximum height H0 is present between the upper end surface (11) and the lower end surface (12).

16. The double-sided cutting insert according to claim 15, characterized in that When looking down from the upper end surface (11), along the Y-axis direction, there is a maximum length H2 between the main longitudinal side surface (41) and the secondary longitudinal side surface (42) on the side close to the corner side surface (7), and a minimum length H between the main longitudinal side surface (41) and the secondary longitudinal side surface (42) in the middle area of ​​the cutting blade, wherein H2>H.

17. The double-sided cutting insert according to claim 16, characterized in that In a cross section perpendicular to the X-axis and parallel to the Y-axis, viewed from the main transverse side (31) to the secondary transverse side (32), the first main longitudinal side (411) has a thickness H10 that gradually decreases along the Y-axis direction, and the fifth main longitudinal side (415) has a thickness H12 that gradually increases along the Y-axis direction.

18. The double-sided cutting insert according to claim 17, characterized in that In a cross section perpendicular to the X-axis and parallel to the Y-axis, viewed from the main transverse side (31) to the secondary transverse side (32), the seventh main longitudinal side (417) has a distance H3 closer to the center of the cutting blade (100) relative to the first main longitudinal side (411), and the sixth main longitudinal side (416) has a distance H4 closer to the center of the cutting blade (100) relative to the fifth main longitudinal side (415), wherein 0<H3<H1, 0<H4<H1.

19. The double-sided cutting insert according to claim 18, characterized in that When looking down at the main longitudinal side (41) from the Y-axis direction, the main longitudinal side (41) has a maximum width W between the main transverse side (31) and the secondary transverse side (32), and has a minimum width W3 between the two corner sides (7), wherein 0.1<W-W3<2.

2.

20. The double-sided cutting insert according to claim 19, characterized in that When the main longitudinal side (41) is viewed from the Y-axis direction, the main longitudinal side (41) has a maximum width W between the main transverse side (31) and the secondary transverse side (32), and the intersection boundary of the second main longitudinal side (412) and the sixth main longitudinal side (416) is closer to the secondary transverse side (32) relative to the Z-axis and has a spacing W1 with the Z-axis, wherein 0.001≤W1:W≤0.

45.

21. The double-sided cutting insert according to claim 2, wherein: In a cross section perpendicular to the X-axis and parallel to the Y-axis, viewed from the main transverse side (31) to the secondary transverse side (32), the third main longitudinal side (413) has a gradually increasing area, a constant area, and a gradually decreasing area in sequence.

22. The double-sided cutting insert according to claim 2, wherein: The corner side surface (7) comprises a plurality of first corner side surfaces (71) and a plurality of fourth corner side surfaces (74); The blade portion formed at the intersection of the side surface and the upper end surface (11) comprises a main blade (5), and the main blade (5) comprises at least: a main cutting edge (51), a main corner cutting edge (52), a secondary cutting edge (53), and a secondary corner cutting edge (54), wherein the main cutting edge (51) is arranged at the intersection of the main transverse side surface (31) and the upper end surface (11), the main corner cutting edge (52) is arranged at the intersection of the first corner side surface (71) and the upper end surface (11), the secondary cutting edge (53) is arranged at the intersection of the main longitudinal side surface (41) adjacent to the first corner side surface (71) and the upper end surface (11), and the secondary corner cutting edge (54) is arranged at the intersection of the fourth corner side surface (74) and the upper end surface (11); Wherein, two ends of the main cutting edge (51) are respectively connected to the main corner cutting edge (52) and the secondary corner cutting edge (54); When looking down at the upper end surface (11) from the Z-axis direction, the main cutting edge (51) is convex; When looking down at the main transverse side surface (31) from the X-axis direction, the distance between the main cutting edge (51) in the Z-axis direction and the Y-axis first decreases and then increases from the main corner cutting edge (52) to the secondary corner cutting edge (54); The blade portion further comprises a secondary blade (6), the secondary blade (6) being arranged at the intersection of the main longitudinal side surface (41) and the upper end surface (11) on the side adjacent to the fourth corner side surface (74), the two ends of the secondary cutting edge (53) being respectively connected to the main corner cutting edge (52) and the secondary blade (6), when the main longitudinal side surface (41) is viewed from the Y-axis direction, from the main transverse side surface (31) to the secondary transverse side surface (32), the secondary cutting edge (53) is inclined in a direction closer to the X-axis and has an angle α1 with the X-axis, and the secondary blade (6) has an angle α2 with the X-axis, wherein 0°<α1≤35°, 0°≤α2≤30°, and α1≥α2.

23. A cutting tool, characterized in that: include: A tool body (200) and a cutting insert (100) according to any one of claims 1 to 22; The upper end surface (11) of the cutting blade (100) is provided with an upper mounting surface (111), and the lower end surface (12) is provided with a lower mounting surface (121); The blade body (200) has at least one blade particle groove (201), the blade particle groove (201) comprises a fourth longitudinal support surface (2014) and a third support surface (2013), the fourth longitudinal support surface (2014) matches the sixth main longitudinal side surface (416) or the seventh main longitudinal side surface (417), and the third support surface (2013) matches the upper mounting surface (111) or the lower mounting surface (121); The fourth longitudinal support surface (2014) is arranged on a side away from the cutting blade (100) along the rotation axis direction of the blade body (200) and is inclined toward the inside of the blade particle groove (201).

Images