Cutting insert and cutting tool
By designing gradually decreasing chip channels on the cutting insert, chip folding and brittle deformation are achieved, solving the problems of chip entanglement and adhesion during the cutting process, improving machining quality and safety, and extending tool life.
Patent Information
- Application Number
- CN202520006383.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-02
- Publication Date
- 2026-01-16
- Estimated Expiration
- 2035-01-02
AI Technical Summary
During the cutting process, existing cutting tools often produce excessively long chips that are prone to entanglement, affecting machining quality and safety, leading to poor heat dissipation, adhesion, and tool breakage, thus shortening their service life.
Design a cutting insert with a chip channel that gradually decreases in size along the cutting direction. The chip channel folds and deforms the chips to accelerate fracture, avoids adhesion and chipping, and extends tool life.
It improves machining quality and safety, avoids the adhesion of cutting blades and chips, extends tool life, and has a wider range of applications.
Smart Images
Figure CN223801569U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to mechanical cutting technical field especially relates to a cutting blade and cutting tool. BACKGROUND
[0002] The cutting tool can cut off and groove the bar, and is usually used in batch production. When the cutting tool cuts off and grooves the bar, swarf is generated, which gradually grows with the cutting process of the cutting tool. If the swarf is too long, it will wrap around the cutting tool, affecting the quality of the machined part surface and the use safety, and also causing poor heat dissipation of the cutting tool, thus increasing the cutting area temperature and accelerating the softening of the cutting tool, which easily causes the cutting edge of the tool to stick to the swarf and the cutting edge to break, affecting the service life of the tool and requiring improvement. SUMMARY
[0003] The utility model discloses at least one of the technical problems existing in the prior art. To this end, the utility model provides a cutting blade, which can ensure the machining quality and use safety, avoid the sticking of the cutting blade to the swarf caused by high temperature, and avoid the breakage of the cutting blade, thus prolonging the service life of the cutting blade.
[0004] The cutting blade according to the utility model embodiment has a top surface and a bottom surface facing away from each other, and a plurality of side surfaces connected between the top surface and the bottom surface, which are distributed in the circumferential direction of the cutting blade. The cutting blade forms a cutting portion at the intersection of two adjacent side surfaces, the cutting portion has a rake face, the rake face is provided with two swarf protrusions, a swarf channel extending in the cutting direction is formed between the two swarf protrusions, and the width of at least part of the swarf channel gradually decreases in the cutting direction.
[0005] The cutting blade according to the utility model embodiment has a top surface and a bottom surface facing away from each other, and a plurality of side surfaces connected between the top surface and the bottom surface, which are distributed in the circumferential direction of the cutting blade. The cutting blade forms a cutting portion at the intersection of two adjacent side surfaces, the cutting portion has a rake face, the rake face is provided with two swarf protrusions, a swarf channel extending in the cutting direction is formed between the two swarf protrusions, and the width of at least part of the swarf channel gradually decreases in the cutting direction.
[0006] According to the cutting blade of some embodiments of the present application, the chip passage comprises a first chip section, a second chip section and a third chip section which are sequentially communicated along the cutting direction, the width of the first chip section gradually decreases along the cutting direction, and the width of the third chip section gradually increases along the cutting direction.
[0007] According to the cutting blade of some embodiments of the present application, the maximum width of the first chip section is L1, the minimum width of the second chip section is L2, the maximum width of the third chip section is L3, and L2 < L3 ≤ L1 is satisfied.
[0008] According to the cutting blade of some embodiments of the present application, the protruding height of the chip protrusion is H, and 0mm < H ≤ 0.05mm is satisfied.
[0009] According to the cutting blade of some embodiments of the present application, the cutting portion has a chip breaking groove, the two chip protrusions are formed in the chip breaking groove, and the chip passage is communicated with the chip breaking groove.
[0010] According to the cutting blade of some embodiments of the present application, the chip breaking groove comprises an arc-shaped concave portion and two arc-shaped side portions, the two arc-shaped side portions are distributed in a direction intersecting with the cutting direction, the arc-shaped concave portion is communicated with the chip passage, the arc-shaped concave portion is communicated between the two arc-shaped side portions, and the two arc-shaped side portions are respectively located outside the two chip protrusions.
[0011] According to the cutting blade of some embodiments of the present application, the radius of the arc-shaped concave portion is r1, the radius of the arc-shaped side portion is r2, and r2 < r1 is satisfied.
[0012] According to the cutting blade of some embodiments of the present application, the cutting portion further has a relief surface, a first side wall and a second side wall, the main cutting edge is formed at the intersection of the relief surface and the rake surface, the first side wall and the second side wall are respectively connected to the two sides of the rake surface, the first side wall and the rake surface form a first auxiliary cutting edge at the intersection, the second side wall and the rake surface form a second auxiliary cutting edge at the intersection, and the two ends of the main cutting edge are respectively connected with the first auxiliary cutting edge and the second auxiliary cutting edge.
[0013] According to the cutting blade of some embodiments of the present application, the side surface is at least three;
[0014] And / or, the side surface is three and constitutes an equilateral triangle.
[0015] The present application further provides a cutting tool.
[0016] According to the cutting tool of the embodiment of the present application, the cutting insert is as described in any one of the above.
[0017] The cutting tool and the cutting insert have the same advantages as the prior art, which will not be repeated here.
[0018] The additional aspects and advantages of the present application will be partially given in the following description, partially will become obvious from the following description, or will be understood through the practice of the present application. BRIEF DESCRIPTION OF DRAWINGS
[0019] The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:
[0020] Figure 1 is a structure diagram of the cutting insert according to the embodiment of the present application Figure One ;
[0021] Figure 2 is a structure diagram of the cutting insert according to the embodiment of the present application Figure Two ;
[0022] Figure 3 is a local structure diagram of the cutting insert according to the embodiment of the present application Figure One ;
[0023] Figure 4 is a local structure diagram of the cutting insert according to the embodiment of the present application Figure Two ;
[0024] Figure 5 is a local sectional view of the cutting insert according to the embodiment of the present application
[0025] Figure 6 is a structure diagram of the cutting insert according to the embodiment of the present application Figure Three .
[0026] REFERENCE NUMERALS:
[0027] cutting insert 100,
[0028] top surface 1, bottom surface 2, side surface 3, through hole 4,
[0029] cutting portion 5, rake surface 51, chip protrusion 52, chip passage 53, first chip section 531, second chip section 532, third chip section 533, chip breaking groove 54, arc-shaped recess 541, arc-shaped side 542, relief surface 55, first side wall 56, second side wall 57, main cutting edge 58, first auxiliary cutting edge 59, second auxiliary cutting edge 60. DETAILED DESCRIPTION
[0030] The embodiments of the present application are described below in detail, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary only, and are used only for explaining the present application, and cannot be understood as a limitation of the present application.
[0031] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application. In addition, the features defined as "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.
[0032] In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0033] Reference is made below Figures 1-6 The cutting blade 100 according to the embodiments of the present application can ensure the machining quality and the use safety, avoid the bonding phenomenon between the cutting blade 100 and the chips caused by the excessively high temperature, and avoid the collapse of the cutting blade 100, thereby prolonging the service life of the cutting blade 100.
[0034] As Figures 1-6As shown, according to the cutting blade 100 of one embodiment of the utility model, the cutting blade 100 has a top surface 1 and a bottom surface 2 which are away from each other, the cutting blade 100 further has a plurality of side surfaces 3 which are connected between the top surface 1 and the bottom surface 2, the plurality of side surfaces 3 are distributed in the circumferential direction of the cutting blade 100, wherein the cutting blade 100 is formed with a cutting portion 5 at the intersection of the adjacent two side surfaces 3, the cutting portion 5 has a rake surface 51, the rake surface 51 is provided with two chip protrusions 52, a chip channel 53 extending in the cutting direction is formed between the two chip protrusions 52, and the width of at least part of the chip channel 53 is gradually reduced in the cutting direction.
[0035] Wherein, when the cutting blade 100 is used for cutting processing of steel materials and the like, the removed excess materials will form chips, the chips can be continuously elongated without external intervention, thereby increasing the load of the cutting blade 100, affecting the structural strength of the cutting blade 100, making the cutting blade 100 prone to collapse and the like, shortening the service life of the cutting blade 100, and after the chips are elongated, the chips are prone to winding outside the cutting blade 100, affecting the heat dissipation of the blade, making the chips and the cutting blade 100 prone to bonding phenomenon, or after the chips are elongated, the chips will extend to the surface of the cut material, affecting the processing quality, at the same time, the too long chips will affect the stability of the cutting process, causing large cutting force fluctuation, affecting the cutting quality.
[0036] Specifically, the cutting blade 100 is provided with the top surface 1 and the bottom surface 2 which are away from each other, and a plurality of side surfaces 3 are arranged between the top surface 1 and the bottom surface 2, the plurality of side surfaces 3 can be three, four or five, and the like, the plurality of side surfaces 3 are respectively connected with the top surface 1 and the bottom surface 2, and are distributed in the circumferential direction of the cutting blade 100, thereby forming the cutting blade 100, and the cutting blade 100 is further provided with a through hole 4 which extends along the distribution direction of the top surface 1 and the bottom surface 2 and penetrates through the cutting blade 100, so that the cutting blade 100 can be installed in the remaining structure through the through hole 4, and the use reliability of the cutting blade 100 is ensured.
[0037] Further, the cutting blade 100 is formed with the cutting portion 5 at the intersection of the adjacent two side surfaces 3, the cutting portion 5 can be in contact with the material to be cut, and the cutting portion 5 can be provided with a blade structure to cut the surface of the material to be cut, the cutting blade 100 is provided with a plurality of side surfaces 3, the intersection of the adjacent two side surfaces 3 can be formed with the cutting portion 5, that is, the cutting portion 5 can also be formed with a plurality of cutting portions 5, and when the cutting blade 100 is in operation, the plurality of cutting portions 5 can cut the material to be cut in turn, thereby improving the cutting efficiency.
[0038] And the cutting part 5 is provided with a rake surface 51, and the chip generated by the material cutting of the cutting edge structure can be conveyed along the rake surface 51, and the rake surface 51 is also provided with a chip protrusion 52, and the chip protrusion 52 is provided with two, and the two chip protrusions 52 are distributed in the direction intersecting with the cutting direction, and a chip channel 53 extending in the cutting direction is formed between the two chip protrusions 52, and one end of the chip channel 53 is open to the cutting edge structure, and the other end is open to the side away from the cutting edge structure, so that the chip can partially enter the chip channel 53 when conveying along the rake surface 51, so that the chip channel 53 can limit the chip, ensure the stability of the cutting process, and reduce the cutting force fluctuation.
[0039] In addition, at least part of the width of the chip channel 53 is gradually reduced along the cutting direction, that is, the width of part of the chip channel 53 can be gradually reduced along the cutting direction, or the width of the entire chip channel 53 can be gradually reduced along the cutting direction. In this embodiment, the width of part of the chip channel 53 is gradually reduced along the cutting direction, so that the chip channel 53 can fold the chip inside it in the width direction, so that the local structural strength of the chip is reduced, and the brittle deformation of the chip is accelerated. At the same time, reducing the structural strength of the chip can avoid the lengthening process of the chip, so that the chip can break during the lengthening process, thereby reducing the load of the cutting insert 100, prolonging the service life of the cutting insert 100, and avoiding the chip winding around the cutting insert 100, affecting the heat dissipation of the cutting insert 100, improving the heat dissipation effect of the cutting insert 100, and improving the machining quality and ensuring the use effect.
[0040] According to the cutting insert 100 of the embodiment of the utility model, the chip channel 53 is arranged on the rake surface 51, and the width of at least part of the chip channel 53 is gradually reduced along the cutting direction, so that the chip can be conveyed along the chip channel 53, and the chip can be folded by the chip channel 53, thereby accelerating the brittle deformation of the chip, so that the chip breaks, and the machining quality and use safety of the cutting insert 100 can be ensured. The chip does not affect the heat dissipation of the cutting insert 100, so that the cutting insert 100 and the chip do not stick together, and the cutting insert 100 does not crack, thereby prolonging the service life of the cutting insert 100, improving the use effect, and having a wider application range.
[0041] In some embodiments, the chip channel 53 includes a first chip section 531, a second chip section 532 and a third chip section 533 connected in sequence along the cutting direction, the width of the first chip section 531 gradually decreases along the cutting direction, and the width of the third chip section 533 gradually increases along the cutting direction.
[0042] Specifically, the rake face 51 is provided with two chip protrusions 52, and a chip channel 53 extending along the cutting direction is formed between the two chip protrusions 52, so that when the chip is conveyed along the rake face 51, part of the chip can be placed in the chip channel 53, so that part of the chip can be conveyed along the chip channel 53, and as shown in Figures 1-3 The chip channel 53 is provided with a first chip section 531, a second chip section 532, and a third chip section 533, which can be sequentially communicated along the cutting direction, that is, the second chip section 532 is arranged between the first chip section 531 and the third chip section 533, the end of the second chip section 532 close to the cutting edge structure is communicated with the first chip section 531, the end of the second chip section 532 away from the cutting edge structure is communicated with the third chip section 533, and the end of the first chip section 531 away from the second chip section 532 is open, so that part of the chip can enter the chip channel 53 through the open end of the first chip section 531.
[0043] Further, when the cutting edge structure cuts the material, part of the chip can be conveyed along the rake face 51 to the first chip section 531, and then conveyed to the second chip section 532 through the first chip section 531, and then conveyed to the third chip section 533 through the second chip section 532, and the width of the first chip section 531 gradually decreases along the cutting direction, that is, when the chip is conveyed to the first chip section 531, the first chip section 531 can gradually fold the chip as the conveying process proceeds, the width of the second chip section 532 can be set to gradually decrease along the cutting direction, or can be set to be equal along the cutting direction, when the width of the second chip section 532 is set to gradually decrease along the cutting direction, the chip is conveyed from the first chip section 531 to the second chip section 532, and the second chip section 532 can fold the chip again, and the width of the third chip section 533 gradually increases along the cutting direction, so that the chip conveyed from the second chip section 532 to the third chip section 533 can gradually open, thereby accelerating the brittle deformation of the chip, facilitating the chip to break, to ensure the use reliability and service life of the cutting insert 100, and to ensure the cutting quality.
[0044] In some embodiments, the maximum width of the first chip section 531 is L1, the minimum width of the second chip section 532 is L2, and the maximum width of the third chip section 533 is L3, and L2 < L3 ≤ L1 is satisfied.
[0045] Specifically, the first chip segment 531, the second chip segment 532 and the third chip segment 533 are sequentially connected in the cutting direction, so that the chip can be sequentially conveyed through the first chip segment 531, the second chip segment 532 and the third chip segment 533, and the width of the first chip segment 531 is gradually reduced in the cutting direction, that is, the width of the end of the first chip segment 531 close to the cutting edge structure is the largest, and the maximum width of the first chip segment 531 can be set as L1, the width of the second chip segment 532 can be gradually reduced in the cutting direction, or can be equal in the cutting direction, and the minimum width of the second chip segment 532 can be set as L2, and the width of the third chip segment 533 is gradually increased in the cutting direction, that is, the width of the end of the third chip segment 533 away from the cutting edge structure is the largest, and the maximum width of the third chip segment 533 can be set as L3.
[0046] Further, the maximum width L1 of the first chip segment 531, the minimum width L2 of the second chip segment 532 and the maximum width L3 of the third chip segment 533 can be set to satisfy: L2 < L3 ≤ L1, that is, the maximum width of the first chip segment 531 can be set to be equal to the maximum width of the third chip segment 533, and the maximum width of the first chip segment 531 and the maximum width of the third chip segment 533 are both greater than the minimum width of the second chip segment 532, so that the width of the chip channel 53 is set to be first reduced and then increased in the cutting direction, and then the chip can be folded first and then opened, so as to accelerate the brittle deformation of the chip and facilitate the fracture of the chip.
[0047] Further, the maximum width L1 of the first chip segment 531, the minimum width L2 of the second chip segment 532 and the maximum width L3 of the third chip segment 533 can be set to satisfy: L2 < L3 ≤ L1, that is, the maximum width of the first chip segment 531 can be set to be equal to the maximum width of the third chip segment 533, and the maximum width of the first chip segment 531 and the maximum width of the third chip segment 533 are both greater than the minimum width of the second chip segment 532, so that the width of the chip channel 53 is set to be first reduced and then increased in the cutting direction, and then the chip can be folded first and then opened, so as to accelerate the brittle deformation of the chip and facilitate the fracture of the chip.
[0048] In some embodiments, the protrusion height of the chip protrusion 52 is set as H, and satisfies: 0mm < H ≤ 0.05mm.
[0049] Specifically, the rake face 51 is provided with two chip protrusions 52, and the protrusion heights of the two chip protrusions 52 are set to be the same, which can avoid the chip from sliding out from the side with lower protrusion height of the chip protrusion 52, and ensure the reliability of conveying the chip along the chip channel 53, and as Figure 4As shown, the protrusion height of the chip protrusion 52 can be set as H, and satisfies: 0mm < H≤0.05mm, that is, the protrusion height H of the chip protrusion 52 can be set as 0.01, 0.015, 0.02, 0.025, 0.03, 0.035, 0.04, 0.045 or 0.05, etc., and the two chip protrusions 52 can jointly define a chip passage 53, and part of the chip can be transported through the chip passage 53, and the chip passage 53 can fold and open the chip, so as to accelerate the brittle deformation of the chip, and setting the protrusion height H of the chip protrusion 52 to satisfy: 0mm < H≤0.05mm can ensure the setting depth of the chip passage 53, so that the chip is transported along the chip passage 53, and then the reliability of folding and opening the chip can be ensured, so as to ensure the breaking reliability of the chip.
[0050] And in the process of transporting the chip, the top of the two chip protrusions 52 can cause the chip flowing through to produce two embossing lines, so as to increase the brittleness of the chip, so as to accelerate the curling and breaking of the chip.
[0051] In some embodiments, the cutting part 5 has a chip breaker groove 54, and the two chip protrusions 52 are formed in the chip breaker groove 54, and the chip passage 53 communicates with the chip breaker groove 54.
[0052] Specifically, the cutting part 5 is provided with a chip breaker groove 54, and the two chip protrusions 52 can be formed in the chip breaker groove 54, that is, the chip breaker groove 54 can be set to be open towards the blade structure, the two chip protrusions 52 are formed in the chip breaker groove 54, and one end of the chip passage 53 defined by the two chip protrusions 52 is also open towards the blade structure, so that part of the chip breaker groove 54 can be distributed outside the two chip protrusions 52, and part of the chip breaker groove 54 can be distributed on the side of the two chip protrusions 52 away from the blade structure.
[0053] Further, part of the side of the chip breaker groove 54 away from the blade structure can communicate with the chip passage 53, that is, one end of the chip passage 53 away from the blade structure communicates with the chip breaker groove 54, so that the chip after being folded through the first chip section 531 and the second chip section 532 and being opened through the third chip section 533 can flow into the chip breaker groove 54, the folded and opened chip can accelerate the brittle deformation, and the chip breaker groove 54 can be provided with an arc, so that the chip after accelerating the brittle deformation can be curled again at the chip breaker groove 54, so as to ensure the breaking of the chip and the use reliability.
[0054] In some embodiments, the chip breaker groove 54 includes an arc-shaped recess 541 and two arc-shaped sides 542, the two arc-shaped sides 542 are spaced apart and distributed along a direction intersecting the cutting direction, the arc-shaped recess 541 communicates with the chip passage 53, the arc-shaped recess 541 communicates between the two arc-shaped sides 542, and the two arc-shaped sides 542 are respectively located outside the two chip protrusions 52.
[0055] Specifically, the rake face 51 is provided with the chip breaker groove 54 and the chip protrusion 52, and as shown, the chip breaker groove 54 is provided with an arc-shaped recess 541 and two arc-shaped side portions 542, the arc-shaped recess 541 is arranged to be recessed inwardly into the cutting insert 100 relative to the rake face 51, the arc-shaped side portions 542 can be arranged to be protruded outwardly out of the cutting insert 100 relative to the rake face 51, the two arc-shaped side portions 542 are arranged to be spaced apart and distributed along a direction intersecting the cutting direction, the two arc-shaped side portions 542 can be arranged to extend from the cutting edge structure to a position away from the cutting edge structure on the rake face 51, the arc-shaped recess 541 is arranged between the two arc-shaped side portions 542, and the arc-shaped recess 541 is communicated with the two arc-shaped side portions 542 respectively, and the two chip protrusions 52 are also arranged between the two arc-shaped side portions 542. Figure 2 Thus, when the chip is conveyed along the rake face 51, part of the chip can be folded through the chip passage 53, and part of the chip can also be bent through the arc-shaped side portions 542, so that the chip at multiple positions along the direction intersecting the cutting direction is bent, and when the chip is conveyed to the arc-shaped recess 541, the chip can also be crimped through the arc-shaped recess 541 and the arc-shaped side portions 542 on both sides, and thus the chip can be crimped and bent multiple times to accelerate the brittle deformation of the chip, facilitate the fracture of the chip, and ensure the use reliability and cutting quality of the cutting insert 100.
[0056] In some embodiments, the radius of the arc-shaped recess 541 is r1, the radius of the arc-shaped side portion 542 is r2, and r2 < r1 is satisfied.
[0057] Specifically, the arc-shaped recess 541 is arranged to be recessed inwardly into the cutting insert 100 relative to the rake face 51, and the radius of the arc-shaped recess 541 is r1, the arc-shaped side portion 542 can be arranged to be protruded outwardly out of the cutting insert 100 relative to the rake face 51, and the radius of the arc-shaped side portion 542 is r2, so that as shown, the upper surface of the cross section of the chip breaker groove 54 can form a wavy structure, and the radius r1 of the arc-shaped recess 541 and the radius r2 of the arc-shaped side portion 542 are arranged to satisfy r2 < r1, that is, the radius r1 of the arc-shaped recess 541 is arranged to be greater than the radius r2 of the arc-shaped side portion 542, and thus the depth of the recess of the arc-shaped recess 541 inwardly into the cutting insert 100 relative to the rake face 51 is relatively deep, when the chip is conveyed to the chip breaker groove 54, the arc-shaped recess 541 can bend the chip greatly, and the two arc-shaped side portions 542 can also bend the two sides of the chip in the opposite direction, and thus the chip at multiple positions can be crimped to accelerate the brittle deformation of the chip, reduce the structural strength of the chip, and ensure the use reliability and cutting quality of the cutting insert 100.
[0058] Figure 5
[0059] In some embodiments, the cutting part 5 further includes a flank face 55, a first sidewall 56, and a second sidewall 57. A main cutting edge 58 is formed at the intersection of the flank face 55 and the rake face 51. The first sidewall 56 and the second sidewall 57 are respectively connected to the two sides of the rake face 51. A first secondary cutting edge 59 is formed at the intersection of the first sidewall 56 and the rake face 51. A second secondary cutting edge 60 is formed at the intersection of the second sidewall 57 and the rake face 51. The two ends of the main cutting edge 58 are respectively connected to the first secondary cutting edge 59 and the second secondary cutting edge 60.
[0060] Specifically, such as Figure 1 As shown, the cutting part 5 also has a flank face 55, a first sidewall 56, and a second sidewall 57. The flank face 55 is connected to the rake face 51, and a main cutting edge 58 is formed at the junction of the flank face 55 and the rake face 51. The main cutting edge 58 is the aforementioned cutting edge structure. The cutting insert 100 can perform cutting processing on the material to be cut through the main cutting edge 58. The first sidewall 56 and the second sidewall 57 are respectively connected to both sides of the rake face 51, and a first secondary cutting edge 59 is formed at the intersection of the first sidewall 56 and the rake face 51. A second secondary cutting edge 60 is formed at the intersection of the second sidewall 57 and the rake face 51. The first secondary cutting edge 59 and the second secondary cutting edge 60 also have cutting functions. When a portion of the chip contacts the first secondary cutting edge 59 and the second secondary cutting edge 60, the first secondary cutting edge 59 and the second secondary cutting edge 60 can cut the chip, which can also avoid excessive cutting length and ensure the reliability of the cutting insert 100.
[0061] Furthermore, the two ends of the main cutting edge 58 can be connected to the first secondary cutting edge 59 and the second secondary cutting edge 60 respectively. That is, after the main cutting edge 58 cuts the material to be cut, the chips can be conveyed along the extension direction of the first secondary cutting edge 59 and the second secondary cutting edge 60, thereby increasing the probability that the first secondary cutting edge 59 and the second secondary cutting edge 60 will cut the chips and ensuring the reliability of the cutting part 5.
[0062] In addition, the connection between the back face 55 and the first side wall 56 and the second side wall 57 can be set as a transition arc connection. The transition arc can avoid stress accumulation during the cutting process, effectively improve the structural strength of the cutting part 5, and thus extend the service life of the cutting insert 100.
[0063] In some embodiments, the side surface 3 is provided as at least three, i.e., the side surface 3 can be provided as three, four or five, etc., at least three side surfaces 3 are connected between the top surface 1 and the bottom surface 2, and the connecting position of adjacent two side surfaces 3 is provided with a cutting portion 5, the side surface 3 is provided as at least three, so that the cutting portion 5 is also provided as at least three, i.e., the cutting portion 5 can be provided as three, four or five, etc., the cutting portion 5 can cut the material to be cut, the cutting portion 5 is provided as at least three, so that at least three cutting portions 5 can cut the material to be cut in turn, thereby improving the cutting efficiency, and the cutting portion 5 is provided as at least three, which can reduce the fatigue degree of a single cutting portion 5, prolong the service life of the cutting insert 100, and reduce the setting cost.
[0064] In other embodiments, the side surface 3 is provided as three and forms an equilateral triangle.
[0065] Specifically, the side surface 3 is connected between the top surface 1 and the bottom surface 2, and the side surface 3 can be provided as three, the three side surfaces 3 are sequentially connected along the circumference of the cutting insert 100, and the three side surfaces 3 can form an equilateral triangle, the cutting portion 5 is arranged at the connecting position of adjacent two side surfaces 3, and the cutting portion 5 can also be provided as three, the connecting line between the three cutting portions 5 can also form an equilateral triangle, and the three cutting portions 5 can cut the material to be cut in turn, when the cutting portion 5 cuts, the material can generate a force on the cutting portion 5, the connecting line between the three cutting portions 5 forms an equilateral triangle, so that the force acting on each cutting portion 5 is equal, avoiding the situation that a single cutting portion 5 is broken due to excessive force, and prolonging the service life.
[0066] The utility model also provides a cutting tool.
[0067] According to the cutting tool of the utility model embodiment, the cutting insert 100 can be provided as a groove cutter blade, and the cutting tool can be provided as a groove cutter.
[0068] According to the cutting tool of the utility model embodiment, the cutting insert 100 can be provided as a groove cutter blade, and the cutting tool can be provided as a groove cutter.
[0069] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily mean the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0070] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made thereto without departing from the principles and spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.
Claims
1. A cutting insert, characterized by, The cutting insert has a top surface and a bottom surface facing away from each other, and a plurality of side surfaces connected between the top surface and the bottom surface, the plurality of side surfaces being distributed in a circumferential direction of the cutting insert; The cutting insert is formed with a cutting portion at an intersection of two adjacent side surfaces, the cutting portion is provided with a rake surface, the rake surface is provided with two chip projections, a chip passage extending in a cutting direction is formed between the two chip projections, and at least part of the chip passage is gradually reduced in width in the cutting direction.
2. The cutting insert according to claim 1, characterized in that, The chip passage comprises a first chip section, a second chip section and a third chip section sequentially communicated in the cutting direction, the first chip section is gradually reduced in width in the cutting direction, and the third chip section is gradually increased in width in the cutting direction.
3. The cutting insert according to claim 2, characterized in that, The maximum width of the first chip section is L1, the minimum width of the second chip section is L2, the maximum width of the third chip section is L3, and L2 < L3 ≤ L1 is satisfied.
4. The cutting insert according to claim 1, characterized in that, The projection height of the chip projection is H, and 0 mm < H ≤ 0.05 mm is satisfied.
5. The cutting insert according to any one of claims 1-4, wherein, The cutting portion is provided with a chip breaker groove, the two chip projections are formed in the chip breaker groove, and the chip passage is communicated with the chip breaker groove.
6. The cutting insert according to claim 5, characterized in that, The chip breaker groove comprises an arc-shaped recess and two arc-shaped side portions, the two arc-shaped side portions are distributed in a direction intersecting the cutting direction, the arc-shaped recess is communicated with the chip passage, the arc-shaped recess is communicated between the two arc-shaped side portions, and the two arc-shaped side portions are respectively located outside the two chip projections.
7. The cutting insert according to claim 6, characterized in that, The radius of the arc-shaped recess is r1, the radius of the arc-shaped side portion is r2, and r2 < r1 is satisfied.
8. The cutting insert according to any one of claims 1-4, wherein, The cutting portion is further provided with a relief surface, a first side wall and a second side wall, the relief surface and the rake surface intersect to form a main cutting edge, the first side wall and the second side wall are respectively connected to two sides of the rake surface, the first side wall and the rake surface intersect to form a first secondary cutting edge, the second side wall and the rake surface intersect to form a second secondary cutting edge, and two ends of the main cutting edge are respectively connected to the first secondary cutting edge and the second secondary cutting edge.
9. The cutting insert according to any one of claims 1-4, wherein, The side surface is provided as at least three; And / or, the side surface is provided as three and forms an equilateral triangle.
10. A cutting tool characterized by, The cutting insert of any one of claims 1-9.