Cutting insert

Abstract

The invention discloses a cutting blade, and belongs to the technical field of cutting tools. And each group of auxiliary chip breaking arms and main chip breaking arms are arranged along the radial direction of the cutting part and have a height difference. In this way, the front end of the main chip breaking arm and the auxiliary chip breaking grooves in the auxiliary chip breaking arms can form a first chip breaker, a main chip breaking groove is defined by the two adjacent sets of main chip breaking arms and auxiliary chip breaking arms and a part in the cutting face, and then a second chip breaker is formed through combination. Under the working conditions of low feeding and low cutting depth, the first chip breaker acts, formed cutting is thin and narrow, slender chips are formed, under the action of the first chip breaker, the cutting can form a small curling radius, collection of broken chips is facilitated, and the chip removal effect of the slender chips is optimized. Under the working condition of medium-high feeding, due to the fact that the whole front-arranged first chip breaker is gentle, the influence on cutting resistance is small, in the covering process of cuttings, the front end of the second chip breaker can conduct pre-flow guiding on the cuttings, the second chip breaker can fully act, and the more excellent chip breaking effect is provided.

Description

Technical Field

[0001] The present application relates to the technical field of cutting tools, and in particular to a cutting blade. Background Art

[0002] With the rapid development of my country's aerospace industry, the processing of key parts is particularly important. In the context of highly automated processing, good cutting tools play a key role in product quality. The materials of its parts are mainly difficult-to-process materials such as titanium alloys and high-temperature alloys, which have the characteristics of high hardness and difficulty in processing. Some key parts have complex external contours or internal cavities.

[0003] However, the machining quality of workpieces by cutting inserts in current cutting tools is still relatively low. Summary of the invention

[0004] The embodiment of the present application provides a cutting blade, which can solve the problem of low workpiece processing quality of the cutting blade in the prior art. The technical solution is as follows:

[0005] In one aspect, a cutting insert is provided, the cutting insert comprising:

[0006] A main body, and a cutting portion fixedly connected to an end of the main body, wherein the cutting portion and the main body are arranged along a first direction;

[0007] The cutting portion has an upper surface and a bottom surface arranged along a second direction, and a back cutting surface connecting the upper surface and the bottom surface, and the first direction is perpendicular to the second direction;

[0008] The upper surface of the cutting portion is provided with: an annular cutting surface, and a plurality of main chip breaking arms and a plurality of auxiliary chip breaking arms located in the area surrounded by the cutting surface and arranged in an array around the central axis of the cutting portion, the plurality of main chip breaking arms correspond to the plurality of auxiliary chip breaking arms one by one, each auxiliary chip breaking arm is connected between the corresponding main chip breaking arm and the cutting surface, the ends of two adjacent main chip breaking arms facing away from the corresponding auxiliary chip breaking arms are connected to each other, and the height of the main chip breaking arm along the second direction is greater than the height of the corresponding auxiliary chip breaking arm along the second direction; a main cutting edge is formed at the connection between the cutting surface and the back tool surface;

[0009] Wherein, two groups of adjacently arranged main chip breaking arms and auxiliary chip breaking arms and a portion in the cutting surface form a main chip breaking groove, and the auxiliary chip breaking arm has an auxiliary chip breaking groove connected to the main chip breaking groove.

[0010] Optionally, the main chip breaker groove includes: a first transition arc groove and a main chip breaker groove body, the first transition arc groove is connected between the cutting surface and the main chip breaker groove body, and both sides of the groove surface of the first transition arc groove are smoothly connected to the anti-chip surface of the main chip breaker groove body and the cutting surface respectively.

[0011] Optionally, the auxiliary chip breaker groove comprises: a second transition arc groove and an auxiliary chip breaker groove body, the second transition arc groove is connected between the cutting surface and the auxiliary chip breaker groove body, and both sides of the groove surface of the second transition arc groove are smoothly connected with the anti-chip surface of the auxiliary chip breaker groove body and the cutting surface respectively;

[0012] Among them, a plurality of the second transition circular arc grooves and a plurality of the first transition circular arc grooves are distributed at intervals along the circumference of the cutting portion and are interconnected; along the second direction, the auxiliary chip breaker groove body protrudes from the main chip breaker groove body.

[0013] Optionally, a first angle is formed between the first tangent plane and the first target plane, a second angle is formed between the second tangent plane and the first target plane, the second angle is greater than the first angle, and a radial width of the first transition circular arc groove is greater than a radial width of the second transition circular arc groove, and the first transition circular arc groove and the second transition circular arc groove have the same depth in the second direction;

[0014] Among them, the first target plane is: a plane coplanar with the plane where the main cutting edge is located and perpendicular to the second direction; the first tangent plane is: a plane passing through the connection between the groove surface of the first transition arc groove and the anti-chip surface of the main chip breaker groove body and tangent to the anti-chip surface of the main chip breaker groove body; the second tangent plane is: a plane passing through the connection between the groove surface of the second transition arc groove and the anti-chip surface of the auxiliary chip breaker groove body and tangent to the anti-chip surface of the auxiliary chip breaker groove body.

[0015] Optionally, an annular rake surface located between the cutting surface and the groove surface of the first transition circular arc groove and the groove surface of the second transition circular arc groove is also distributed on the upper surface of the cutting portion.

[0016] Optionally, the annular cutting surface includes: a blunt fillet distributed on the main cutting edge, and a blade width area connected between the blunt fillet and the front cutting edge, and the radial width of the blade width area ranges from 0 mm to 0.2 mm.

[0017] Optionally, the top of the main chip breaking arm has an ellipsoidal chip breaking arm ridge, and in the extension direction of the chip breaking arm ridge, the width of the chip breaking arm ridge first gradually increases and then gradually decreases in the direction away from the auxiliary chip breaking arm.

[0018] Optionally, the ratio of the length of the raised portion of the chip breaker arm to the radius of the cutting portion ranges from 0.65 to 0.8.

[0019] Optionally, the range of the third angle between the flank surface and the second target plane is 5 degrees to 8 degrees, and the second target plane is a plane perpendicular to the first target plane and tangent to the main cutting edge.

[0020] Optionally, when there are two cutting parts, the height of the main body along the second direction is greater than the height of the cutting part along the second direction, and the side of the main body facing the cutting part is a slope, and the main body has a positioning piece arranged on one of the slopes.

[0021] In another aspect, a cutting tool is provided, the cutting tool comprising:

[0022] A cutter body and a cutting blade, wherein the cutting blade is mounted on the cutter body, and the cutting blade is any one of the cutting blades given above.

[0023] The beneficial effects brought by the technical solution provided by the embodiment of the present application include at least:

[0024] A cutting blade may include: a main body, and a cutting part fixedly connected to the end of the main body. The upper surface of the cutting part mainly serves the function of chip cutting and chip removal. A plurality of auxiliary chip breaking arms and a plurality of main chip breaking arms are sequentially arranged in the annular cutting surface along the direction close to the central area of ​​the cutting part. Each group of auxiliary chip breaking arms and main chip breaking arms are arranged along the radial direction of the cutting part and have a height difference. In this way, the front end of the main chip breaking arm and the auxiliary chip breaking groove in the auxiliary chip breaking arm can form a first chip breaker. The two adjacent groups of main chip breaking arms and auxiliary chip breaking arms, as well as the part in the cutting surface, form a main chip breaking groove, that is, they can be combined to form a second chip breaker. Under the condition of lower feed and lower cutting depth, the first chip breaker works, and the cutting formed is thin and narrow, and it is easy to form thin and long chips. Under the action of the first chip breaker, the cutting can form a smaller curling radius, which is conducive to the collection of broken chips and optimizes the chip removal effect of thin and long chips. Under medium and high feed conditions, the first front chip breaker has less effect on the cutting resistance due to its overall flatness. In addition, during chip coverage, the front end of the second chip breaker can pre-direct the chips, allowing the second chip breaker to fully function and provide a more excellent chip breaking effect, thereby improving the surface quality of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 is a top view of a cutting blade provided in an embodiment of the present application;

[0027] Figure 2 yes Figure 1 A front view of a cutting insert is shown;

[0028] Figure 3 yes Figure 1 A side view of a cutting insert is shown;

[0029] Figure 4 yes Figure 1 A schematic diagram of a portion of the structure of a cutting blade is shown;

[0030] Figure 5 yes Figure 1 The cross-sectional view at PP;

[0031] Figure 6 is a partial structural schematic diagram of another cutting blade provided in an embodiment of the present application;

[0032] Figure 7 yes Figure 6 A top view of the cutting insert is shown;

[0033] Figure 8 yes Figure 7 Sectional view at AB;

[0034] Fig. 9 yes Figure 7 Sectional view at AA;

[0035] Fig.10 is a partial structural schematic diagram of another cutting blade provided in an embodiment of the present application;

[0036] Fig.11 It is a schematic diagram of the structure of a cutting tool provided by the present application;

[0037] Fig.12 yes Fig.11 A top view of the cutting tool is shown;

[0038] Fig.13 It is a schematic diagram of the effect of using a cutting tool to process a workpiece provided in an embodiment of the present application.

[0039] Among them, the cutting blade 000, the main body 100, the cutting part 200, the first direction f1, the second direction f2, the upper surface A1, the bottom surface A2, the back face A3, the cutting surface A11, the main chip breaking arm 201, the auxiliary chip breaking arm 202, the main cutting edge R, the main chip breaking groove C1, the auxiliary chip breaking groove C2, the chip breaking arm raised portion 201a, the first transition arc groove C11, the main chip breaking groove body C12, the anti-chip surface B1 of the main chip breaking groove body, the second transition arc groove C21, Auxiliary chip breaker body C22, anti-chip surface B2 of the auxiliary chip breaker body, first cutting plane FX1, first target plane SP, first angle α1, second angle α2, second cutting plane FX2, third cutting plane DX1, fourth cutting plane DX2, second target plane SZ, first sub-cutting surface a1, second sub-cutting surface a2, third angle α3, inclined surface m1, positioning piece 101, fourth angle α4, tool body 001, positioning surface m2, and workpiece 11.

[0040] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0041] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are 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.

[0043] It should be understood that the references to "one embodiment" or "an embodiment" throughout the specification mean that the specific features, structures, or characteristics associated with the embodiment are included in at least one embodiment of the present invention. Therefore, the references to "in one embodiment" or "in an embodiment" appearing throughout the specification do not necessarily refer to the same embodiment. In addition, these specific features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0044] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 , Figure 1 is a top view of a cutting blade provided in an embodiment of the present application, Figure 2 yes Figure 1A front view of a cutting insert is shown, Figure 3 yes Figure 1 A side view of a cutting insert is shown, Figure 4 yes Figure 1 A schematic diagram of a portion of the structure of a cutting blade is shown. Figure 5 yes Figure 1 The cutting blade 000 may include: a main body 100, and a cutting portion 200 fixedly connected to the end of the main body 100, and the cutting portion 200 and the main body 100 may be arranged along the first direction f1. Here, the number of the cutting portions 200 in the cutting blade 000 may be one or two, and the embodiment of the present application does not make a specific limitation on this.

[0045] The cutting portion 200 in the cutting blade 000 may have an upper surface A1 and a bottom surface A2 arranged along a second direction f2, and a flank surface A3 connecting the upper surface A1 and the bottom surface A2, and the first direction f1 may be perpendicular to the second direction f2. For example, the first direction f1 may be an X-axis direction, and the second direction f2 may be a Z-axis direction. The flank surface A3 of the cutting portion 200 may be at least a portion of the outer side surface of the cutting portion 200.

[0046] The upper surface A1 of the cutting part 200 in the cutting blade 000 is distributed with: an annular cutting surface A11, and a plurality of main chip breaking arms 201 and a plurality of auxiliary chip breaking arms 202 arranged in an array in the area surrounded by the annular cutting surface A11 and around the central axis L of the cutting part 200, and the plurality of main chip breaking arms 201 correspond to the plurality of auxiliary chip breaking arms 202 one by one. Each auxiliary chip breaking arm 202 is connected between the corresponding main chip breaking arm 201 and the cutting surface A11, and the ends of two adjacent main chip breaking arms 201 away from the corresponding auxiliary chip breaking arms 202 are connected to each other, and the height of the main chip breaking arm 201 along the second direction f2 is greater than the height of the corresponding auxiliary chip breaking arm along the second direction (that is, the main chip breaking arm 201 protrudes from the auxiliary chip breaking arm 202 in the second direction f2). The main cutting edge R can be formed at the connection between the cutting surface A11 and the back cutting surface A3 in the cutting part 200. For example, the boundary shape of the annular cutting surface A11 can be formed in a circular arc shape. It should be noted that the cutting portion 200 is irregular in shape, and the orthographic projection of the upper surface A1 of the cutting portion 200 in the second direction f2 is a circle. The central axis L of the cutting portion 200 may be an axis passing through the origin of the circle and parallel to the second direction f2.

[0047] Among them, the two groups of adjacently arranged main chip breaking arms 201 and auxiliary chip breaking arms 202, and the portion in the cutting surface A11 can be used to enclose a main chip breaking groove C1, and the auxiliary chip breaking arm 202 can have an auxiliary chip breaking groove C2 connected to the main chip breaking groove C1. Here, the end of the main chip breaking arm 201 close to the main cutting edge R is connected to the end of the auxiliary chip breaking groove C2 of the auxiliary chip breaking arm 202 that is away from the main cutting edge R. That is, the end of the main chip breaking arm 201 and the end of the auxiliary chip breaking arm are fixedly connected at the connection.

[0048] Multiple main chip breaking arms 201 and multiple auxiliary chip breaking arms 202 can be distributed in a divergent shape along the center of the cutting portion 200 and at equal intervals. For example, the number of main chip breaking arms 201 can be 12, the number of auxiliary chip breaking arms 202 can also be 12, and the number of main chip breaking grooves C1 and auxiliary chip breaking grooves C2 can both be 12. It should be noted that the embodiment of the present application does not specifically limit the number of main chip breaking arms 201 and auxiliary chip breaking arms.

[0049] In the embodiment of the present application, the upper surface A1 of the cutting portion 200 mainly plays the role of chip rolling and chip removal. A plurality of auxiliary chip breaking arms 202 and a plurality of main chip breaking arms 201 are arranged in sequence within the annular cutting surface A11 along the direction close to the central area of ​​the cutting portion 200. Each group of auxiliary chip breaking arms 202 and main chip breaking arms 201 (that is, the auxiliary chip breaking arms 202 and the corresponding main chip breaking arms 201 connected thereto) are arranged along the radial direction of the cutting portion 200 (the orthographic projection of the upper surface A1 of the cutting portion 200 in the second direction f2 is circular, that is, along the radial direction of the circle) and there is a height difference. In this way, the front end of the main chip breaking arm 201 and the auxiliary chip breaking groove C2 in the auxiliary chip breaking arm 202 can form a first chip breaker, and the two adjacent groups of main chip breaking arms 201 and auxiliary chip breaking arms 202, as well as the part in the cutting surface A11, form a main chip breaking groove C1, that is, the two groups of main chip breaking arms 201 and the main chip breaking groove C1 formed by surrounding the cutting surface A11 can be combined to form a second chip breaker. Under the conditions of lower feed and lower cutting depth, the first chip breaker works, and the cutting formed is thin and narrow, which is easy to form long and thin chips. Under the action of the first chip breaker, the cutting can form a smaller curling radius, which is conducive to the collection of broken chips and optimizes the chip removal effect of long and thin chips. Under medium and high feed conditions, the first front chip breaker has less effect on the cutting resistance due to its overall flatness. In addition, during chip coverage, the front end of the second chip breaker can pre-direct the chips, allowing the second chip breaker to fully function and provide a more excellent chip breaking effect, thereby improving the surface quality of the workpiece.

[0050] It should be noted that if Figure 1 and Figure 4As shown, the second chip breaker is in an open "U" shape when viewed from the middle of the two main chip breaker arms 201, and in an inverted "V" shape when viewed from above. It is narrowed from the arc edge of the main cutting edge R to the arc center of the cutting part. During processing, the chips are more likely to be narrowed and curled as the main chip breaker arms 201 narrow and bulge, thereby achieving the function of optimizing the chip breaking effect.

[0051] In this application, please refer to Figure 6 , Figure 7 and Figure 8 , Figure 6 is a partial structural schematic diagram of another cutting blade provided in an embodiment of the present application, Figure 7 yes Figure 6 A top view of the cutting insert is shown, Figure 8 yes Figure 7 Cross-sectional view at AB. The top of the main chip breaking arm 201 may have an ellipsoidal chip breaking arm ridge 201a, and in the extension direction of the chip breaking arm ridge 201a, the width of the chip breaking arm ridge 201a first gradually increases and then gradually decreases in the direction away from the auxiliary chip breaking arm 202. In this case, the front end of the chip breaking arm ridge 201a can pre-direct the chips, and the ellipsoidal chip breaking arm ridge 201a allows the second chip breaker to fully function, further providing a more excellent chip breaking effect. For example, the ratio of the length of the chip breaking arm ridge 201a to the radius Dc of the cutting portion 200 can range from 0.65 to 0.8. Here, the orthographic projection of the upper surface A1 of the cutting portion 200 in the second direction f2 is circular, and the radius here may refer to the radius along the circle.

[0052] In the examples of this application, please refer to Figure 6 , Figure 7 , Figure 8 and Fig. 9 , Fig. 9 yes Figure 7 Cross-sectional view at AA. The main chip breaker C1 in the cutting part 200 may include: a first transition arc groove C11 and a main chip breaker body C12, the first transition arc groove C11 may be connected between the annular cutting surface A11 and the main chip breaker body C12, and the groove surface of the first transition arc groove C11 is smoothly connected to the anti-chip surface B1 and the cutting surface A11 of the main chip breaker body C12 on both sides. In this way, under medium cutting depth and feeding conditions, the first transition arc groove C11 can have a good chip rolling effect on the chips, and in addition, the chips are guided to the inner side of the main chip breaker arm 201 through the anti-chip surface B1 of the main chip breaker body C12, thereby having a good chip breaking effect on the chips.

[0053] Optional, such as Figure 6 , Figure 7 , Figure 8 and Fig. 9As shown, the secondary chip breaker C2 in the cutting part 200 may include: a second transition arc groove C21 and a secondary chip breaker body C22, wherein the second transition arc groove C21 is connected between the cutting surface A11 and the secondary chip breaker body C22, and the groove surface of the second transition arc groove C21 is smoothly connected to the anti-chip surface B2 of the secondary chip breaker body C22 and the cutting surface A11 respectively on both sides. Among them, a plurality of second transition arc grooves C21 and a plurality of first transition arc grooves C11 are distributed at intervals along the circumference of the cutting part 200 and are interconnected, and along the second direction f2, the secondary chip breaker body C22 protrudes from the main chip breaker body C12. In this way, under the condition of small cutting depth and small feed, the second transition arc groove C21 can have a good chip rolling effect on the chips, and in addition, the anti-chip surface B2 of the secondary chip breaker body C22 can guide the chips to the front end of the main chip breaker arm 201, which has a good chip breaking effect on cutting.

[0054] In the embodiments of the present application, Figure 6 , Figure 7 , Figure 8 and Fig. 9 As shown, several planes are defined in the cutting part 200, and the first target plane SP can be: a plane coplanar with the plane where the main cutting edge R is located and perpendicular to the second direction f2; the second target plane SZ can be: a plane perpendicular to the first target plane SP and tangent to the main cutting edge R; the first tangent plane FX1 can be: a plane passing through the connection between the groove surface of the first transition arc groove C11 and the anti-chip surface B1 of the main chip breaker groove body C12 and tangent to the anti-chip surface B1 of the main chip breaker groove body C12; the second tangent plane FX2 can be: a plane passing through the connection between the groove surface of the second transition arc groove C21 and the anti-chip surface B2 of the auxiliary chip breaker groove body C22 and tangent to the anti-chip surface B2 of the auxiliary chip breaker groove body C22. The third tangent plane DX1 is: a plane passing through the groove bottom of the first transition arc groove C11 and parallel to the first target plane SP; the fourth tangent plane DX2 is: a plane passing through the groove bottom of the second transition arc groove C21 and parallel to the first target plane SP.

[0055] Among them, a first angle α1 may be formed between the first tangent plane FX1 and the first target plane SP, and a second angle α2 may be formed between the second tangent plane FX2 and the first target plane SP, and the second angle α2 may be greater than the first angle α1. And the radial width W1 of the first transition arc groove C11 in the first target plane SP may be greater than the radial width W2 of the second transition arc groove C21 in the first target plane SP (the positive projection of the upper surface A1 of the cutting portion 200 in the second direction f2 is circular, and the radial width here refers to the width along the radial direction of the circle), and the depth h1 of the first transition arc groove C11 in the second direction f2 is the same as the depth h2 of the second transition arc groove C21 in the second direction f2. Here, the depth h1 of the first transition arc groove C11 in the second direction f2 can be: the distance between the first target plane SP and the third tangent plane DX1. The depth h2 of the second transition arc groove C21 in the second direction f2 can be: the distance between the first target plane SP and the fourth tangent plane DX2. The radial width W1 of the first transition circular arc groove C11 is the distance between the intersection of the first tangent plane FX1 and the first target plane SP and the second target plane SZ along the first direction f1. The radial width W2 of the second transition circular arc groove C21 is the distance between the intersection of the second tangent plane FX2 and the first target plane SP and the second target plane SZ along the first direction f1.

[0056] For example, the radial width W1 of the first transition circular arc groove C11 may range from 0.2 mm to 1.2 mm, for example, the radial width of the first transition circular arc groove C11 may be 0.2 mm, 1 mm or 1.2 mm; the depth h1 of the first transition circular arc groove C11 may range from greater than 0 and less than or equal to 0.8 mm, for example, the depth h1 of the first transition circular arc groove C11 may be 0.1 mm, 0.5 mm or 0.8 mm. The first angle α1 formed between the first tangent plane FX1 and the first target plane SP may range from 10 degrees to 30 degrees, for example, the first angle α1 may be 10 degrees, 15 degrees or 30 degrees.

[0057] Optional, such as Figure 7 As shown, an annular front cutting face K is also distributed on the upper surface A1 of the cutting portion 200, which is located between the annular cutting face A11 and the groove surface of the first transition arc groove C11 and the groove surface of the second transition arc groove C21. It should be noted that when the width of the cutting face A11 is 0, the front cutting face K is connected to the back cutting face A3 and the intersection forms a main cutting edge R.

[0058] For example, Figure 7As shown, the annular cutting surface A11 may include: a blunt fillet distributed on the main cutting edge R, and a blade width area a connecting the blunt fillet distributed on the main cutting edge R and the front cutting edge K, and the radial width W3 of the blade width area a (the positive projection of the upper surface A1 of the cutting portion 200 in the second direction f2 is circular, i.e., along the radial direction of the circle) may range from 0 mm to 0.2 mm.

[0059] In this application, if Figure 7 , Figure 8 and Fig. 9 As shown, the main cutting edge R in the cutting portion may have a passivation fillet, and the radius of the passivation fillet may be greater than 0 and less than or equal to 60 microns. In this case, the passivation fillet of the main cutting edge R is mainly used to protect the cutting edge, avoid the undesirable phenomenon of chipping under heavy wear, and thus increase the service life of the cutting blade 000. It should be noted that the radius of the main cutting edge in the cutting portion may also be 0 microns, that is, the main cutting edge R is not subjected to a passivation fillet treatment.

[0060] In the embodiments of the present application, Fig. 9 As shown, the third angle α3 between the back tool surface A3 in the cutting portion 200 and the second target plane SZ may range from 5 to 8 degrees. The second target plane SZ may be a plane perpendicular to the first target plane SP and tangent to the main cutting edge R.

[0061] Optional, please refer to Fig.10 , Fig.10 It is a partial structural schematic diagram of another cutting blade provided by an embodiment of the present application. In the case where the number of cutting parts 200 is two, the height of the main body 100 along the second direction f2 is greater than the height of the cutting part 200 along the second direction f2, and the side of the main body 100 facing the cutting part 200 may be a bevel m1, and the main body 100 may have a positioning member 101 arranged on a bevel m1. In this case, by arranging a positioning member 101 on a bevel m1 in the main body 100, the two cutting parts 200 in the cutting blade 000 can be distinguished by the positioning member 101, which is convenient for the operator to manipulate and install the cutting blade. For example, when the structures of the two cutting parts 200 are different, or when one cutting part 200 has been used for a period of time and needs to be replaced with another cutting part 200, the positioning member 101 can be used to quickly identify the two cutting parts 200. For example, the range of the fourth angle α4 between the bevel m1 and the first target plane SP can be: 120 degrees to 150 degrees.

[0062] In the present application, the positioning member 101 disposed on the inclined surface m1 of the main body 100 may be a groove. For example, the groove may be a circular groove, a square groove, or an elliptical groove, etc., which is not specifically limited in the present embodiment.

[0063] In summary, the embodiment of the present application provides a cutting blade 000, which may include: a main body 100, and a cutting part 200 fixedly connected to the end of the main body 100. The upper surface A1 of the cutting part 200 mainly serves the function of chip cutting and chip removal. A plurality of auxiliary chip breaking arms 202 and a plurality of main chip breaking arms 201 are sequentially arranged in the direction close to the central area of ​​the cutting part 200 in the annular cutting surface A11. Each group of auxiliary chip breaking arms 202 and main chip breaking arms 201 are arranged along the radial direction of the cutting part 200 and have a height difference. In this way, the front end of the main chip breaking arm 201 and the auxiliary chip breaking groove C2 in the auxiliary chip breaking arm 202 can form a first chip breaker, and the two adjacent groups of main chip breaking arms 201 and auxiliary chip breaking arms 202, as well as the part in the cutting surface A11, form a main chip breaking groove C1, that is, they can be combined to form a second chip breaker. Under the condition of low feed and low cutting depth, the first chip breaker works, and the cutting is thin and narrow, which is easy to form long and thin chips. Under the action of the first chip breaker, the cutting can form a small curling radius, which is conducive to the collection of broken chips and optimizes the chip removal effect of long and thin chips. Under the condition of medium and high feed, the first front chip breaker has a relatively gentle overall shape and has a small effect on the cutting resistance. In the process of chip coverage, the front end of the second chip breaker can pre-direct the chips, so that the second chip breaker can fully work, provide a better chip breaking effect, and make the surface quality of the workpiece better.

[0064] The present application also provides a cutting tool. Fig.11 and Fig.12 , Fig.11 is a schematic diagram of the structure of a cutting tool provided by the present application, Fig.12 yes Fig.11 A top view of the cutting tool is shown.

[0065] The cutting tool may include: a cutter body 001 and a cutting blade 000, wherein the cutting blade 000 body is mounted on the cutter body 001, that is, the cutting blade 000 is driven to cut by the rotation or movement of the cutter body 001 by mounting the cutting blade 000 on the cutter body 001. The mounting structure between the cutting blade and the cutter body is not an improvement of the present application, and those skilled in the art may assemble the cutting blade and the cutter body according to the existing mounting method, which will not be described in detail here.

[0066] For example, the cutting portion 200 may also have a positioning surface m2 on the side facing away from the main body 100, and the positioning surface may be perpendicular to the bottom surface A2. The function of the positioning surface m2 is to limit the position of the blade after cooperating with the cutter body 001. It should be noted that when a cutting portion 200 is provided at both ends of the main body 100, the distance from the positioning surface m2 in one cutting portion 200 to the outermost point of the main cutting edge R of the other cutting portion 200 is equal to the distance from the positioning surface m2 in the other cutting portion 200 to the outermost point of the main cutting edge R of one cutting portion 200, and its main function is to ensure the dimensional consistency when the cutting portion 200 is replaced during processing.

[0067] Please refer to Fig.13 , Fig.13 It is a schematic diagram of the effect of using a cutting tool to process a workpiece provided by an embodiment of the present application. The following is a working condition where the above-mentioned cutting tool is used to process an inclined oil groove in the inner hole of an end face. In this working condition, the chip removal space is small. If the chips are blocked, it is easy to cause tool blockage, resulting in tool damage. In severe cases, it will cause damage to the machine tool. Therefore, a cutting tool with better chip breaking effect is required to meet the processing requirements. 11 is a partial half-section view of the workpiece being processed. The workpiece 11 is rotated along the central axis SC, and the processed part is the cavity 12.

[0068] The processing steps are as follows:

[0069] (1) rotating the workpiece 11 in the direction of arrow 13;

[0070] (2) The cutting tool moves along the tool path, so that the rotating workpiece 11 contacts the cutting blade 000 of the cutting tool, and is processed by the cutting portion 200 of the cutting blade 000. Under the action of the second chip breaker, the first roughing process is completed. With the cooperation of the second chip breaker, the cutting is smooth, and short chips are formed and discharged smoothly;

[0071] (3) Use the first chip breaker to perform fine machining again along the contour of the special-shaped bevel groove to remove excess allowance and ensure the dimensional accuracy of the workpiece;

[0072] (4) The cutting tool is moved in the D direction to be separated from the workpiece 11 .

[0073] In the present application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The term "plurality" refers to two or more than two, unless otherwise clearly defined.

[0074] The above description is only an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A cutting insert, characterized in that: include: A main body, and a cutting portion fixedly connected to an end of the main body, wherein the cutting portion and the main body are arranged along a first direction; The cutting portion has an upper surface and a bottom surface arranged along a second direction, and a back cutting surface connecting the upper surface and the bottom surface, and the first direction is perpendicular to the second direction; The upper surface of the cutting portion is provided with: an annular cutting surface, and a plurality of main chip breaking arms and a plurality of auxiliary chip breaking arms located in the area surrounded by the cutting surface and arranged in an array around the central axis of the cutting portion, the plurality of main chip breaking arms correspond to the plurality of auxiliary chip breaking arms one by one, each auxiliary chip breaking arm is connected between the corresponding main chip breaking arm and the cutting surface, ends of two adjacent main chip breaking arms facing away from the corresponding auxiliary chip breaking arms are connected to each other, and the height of the main chip breaking arm along the second direction is greater than the height of the corresponding auxiliary chip breaking arm along the second direction; The connection between the cutting surface and the flank surface forms a main cutting edge; Wherein, two groups of adjacently arranged main chip breaking arms and auxiliary chip breaking arms and a portion in the cutting surface form a main chip breaking groove, and the auxiliary chip breaking arm has an auxiliary chip breaking groove connected to the main chip breaking groove.

2. The cutting insert according to claim 1, characterized in that The main chip breaker groove includes: a first transition arc groove and a main chip breaker groove body, the first transition arc groove is connected between the cutting surface and the main chip breaker groove body, and both sides of the groove surface of the first transition arc groove are smoothly connected to the anti-chip surface of the main chip breaker groove body and the cutting surface respectively.

3. The cutting insert according to claim 2, characterized in that The auxiliary chip breaker groove comprises: a second transition arc groove and an auxiliary chip breaker groove body, wherein the second transition arc groove is connected between the cutting surface and the auxiliary chip breaker groove body, and the groove surface of the second transition arc groove is smoothly connected to the anti-chip surface of the auxiliary chip breaker groove body and the cutting surface on both sides thereof; Among them, the plurality of second transition circular arc grooves and the plurality of first transition circular arc grooves are distributed at intervals along the circumference of the cutting portion and are interconnected, and along the second direction, the auxiliary chip breaker groove body protrudes from the main chip breaker groove body.

4. The cutting insert according to claim 3, characterized in that A first angle is formed between the first tangent plane and the first target plane, a second angle is formed between the second tangent plane and the first target plane, the second angle is greater than the first angle, a radial width of the first transition circular arc groove is greater than a radial width of the second transition circular arc groove, and the first transition circular arc groove and the second transition circular arc groove have the same depth in the second direction; Among them, the first target plane is: a plane coplanar with the plane where the main cutting edge is located and perpendicular to the second direction; the first tangent plane is: a plane passing through the connection between the groove surface of the first transition arc groove and the anti-chip surface of the main chip breaker groove body and tangent to the anti-chip surface of the main chip breaker groove body; the second tangent plane is: a plane passing through the connection between the groove surface of the second transition arc groove and the anti-chip surface of the auxiliary chip breaker groove body and tangent to the anti-chip surface of the auxiliary chip breaker groove body.

5. The cutting insert according to claim 3, characterized in that An annular rake face located between the cutting surface and the groove surface of the first transition circular arc groove and the groove surface of the second transition circular arc groove is also distributed on the upper surface of the cutting portion.

6. The cutting insert according to claim 5, characterized in that The annular cutting surface includes: a blunt fillet distributed on the main cutting edge, and a blade width area connected and distributed between the blunt fillet and the front cutting edge, and the radial width of the blade width area ranges from 0 mm to 0.2 mm.

7. The cutting insert according to any one of claims 1 to 6, characterized in that: The top of the main chip breaking arm has an ellipsoidal chip breaking arm ridge, and in the extending direction of the chip breaking arm ridge, the width of the chip breaking arm ridge first gradually increases and then gradually decreases in the direction away from the auxiliary chip breaking arm.

8. The cutting insert according to claim 7, characterized in that The ratio of the length of the raised portion of the chip breaker arm to the radius of the cutting portion is in the range of 0.65 to 0.

8.

9. The cutting insert according to any one of claims 1 to 6, characterized in that: The range of the third angle between the back cutting surface and the second target plane is 5 degrees to 8 degrees, and the second target plane is a plane perpendicular to the first target plane and tangent to the main cutting edge.

10. The cutting insert according to any one of claims 1 to 6, characterized in that: When there are two cutting parts, the height of the main body along the second direction is greater than the height of the cutting part along the second direction, and the side of the main body facing the cutting part is a slope, and the main body has a positioning piece arranged on one of the slopes.

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