Cutting insert

Abstract

The application discloses a cutting blade and belongs to the technical field of cutting tools. Each group of auxiliary chip breaking arms and main chip breaking arms is arranged along the radial direction of a cutting part and has 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, and the main chip breaking groove is surrounded by two groups of adjacent main chip breaking arms and auxiliary chip breaking arms and part of a cutting surface, that is, a second chip breaker is formed in combination. Under the working condition of low feed and low cutting depth, the first chip breaker acts, the cutting is thin and narrow, and long and thin chips are formed; under the action of the first chip breaker, the cutting can form a small curling radius, which is beneficial to the collection of chips and optimizes the chip removal effect of the long and thin chips. Under the medium-high feed working condition, the front first chip breaker is relatively flat as a whole, has a small influence on the cutting resistance, and in the coverage of the cutting chip, the front end of the second chip breaker can pre-guide the flow of the cutting chip, so that the second chip breaker fully acts and provides more excellent chip breaking effect.

Description

Technical Field

[0001] This application relates to the field of cutting tool technology, and in particular to a cutting insert. Background Technology

[0002] With the rapid development of my country's aerospace industry, the processing of key components has become particularly important. In the context of highly automated machining, good cutting tools play a crucial role in product quality. The materials of these components are mainly difficult-to-machine materials such as titanium alloys and high-temperature alloys, characterized by high hardness and difficulty in machining. Some key components have complex external contours or internal cavities.

[0003] However, the cutting inserts in current cutting tools still provide relatively low machining quality for workpieces. Summary of the Invention

[0004] This application provides a cutting insert. It can solve the problem of low workpiece machining quality caused by existing cutting inserts. The technical solution is as follows:

[0005] On one hand, a cutting insert is provided, the cutting insert comprising:

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

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

[0008] The upper surface of the cutting part is provided with: an annular cutting surface, and multiple main chip breaker arms and multiple secondary chip breaker arms arranged in an array around the central axis of the cutting part within the area enclosed by the cutting surface. The multiple main chip breaker arms correspond one-to-one with the multiple secondary chip breaker arms. Each secondary chip breaker arm is connected between the corresponding main chip breaker arm and the cutting surface. The ends of two adjacent main chip breaker arms that are away from the corresponding secondary chip breaker arms are connected to each other, and the height of the main chip breaker arm along the second direction is greater than the height of the corresponding secondary chip breaker arm along the second direction. The main cutting edge is formed at the junction of the cutting surface and the flank face.

[0009] The two sets of main chip breaker arms and the secondary chip breaker arms arranged adjacent to each other, as well as a portion of the cutting surface, form a main chip breaker groove, and the secondary chip breaker arm has a secondary chip breaker groove connected to the main chip breaker groove.

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

[0012] The plurality of second transition arc grooves and the plurality of first transition arc grooves are distributed at intervals along the circumference of the cutting part and are interconnected; along the second direction, the secondary 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, and 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 the radial width of the first transition arc groove is greater than the radial width of the second transition arc groove. The first transition arc groove and the second transition arc groove have the same depth in the second direction.

[0014] Wherein, 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 point between the groove surface of the first transition arc groove and the anti-chip surface of the main chip breaker body and tangent to the anti-chip surface of the main chip breaker body; the second tangent plane is: a plane passing through the connection point between the groove surface of the second transition arc groove and the anti-chip surface of the secondary chip breaker body and tangent to the anti-chip surface of the secondary chip breaker body.

[0015] Optionally, the upper surface of the cutting part is further provided with an annular rake face located between the cutting surface and the groove surfaces of the first transition arc groove and the second transition arc groove.

[0016] Optionally, the annular cutting surface includes: a rounded corner distributed on the main cutting edge, and a cutting width region connecting the rounded corner and the rake face, wherein the radial width of the cutting width region ranges from 0 mm to 0.2 mm.

[0017] Optionally, the top of the main chip breaker arm has an ellipsoidal chip breaker arm protrusion. In the extending direction of the chip breaker arm protrusion, the width of the chip breaker arm protrusion gradually increases and then gradually decreases in the direction away from the secondary chip breaker arm.

[0018] Optionally, the ratio of the length of the chip breaker arm protrusion to the radius of the cutting portion is in the range of 0.65 to 0.8.

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

[0020] Optionally, when there are two cutting portions, the height of the main body in the second direction is greater than the height of the cutting portion in the second direction, and the side of the main body facing the cutting portion is an inclined surface, and the main body has a positioning member disposed on one of the inclined surfaces.

[0021] On the other hand, a cutting tool is provided, the cutting tool comprising:

[0022] The tool body and the cutting blade, wherein the cutting blade is mounted on the tool body and the cutting blade is any of the cutting blades given above.

[0023] The beneficial effects of the technical solutions provided in this application include at least the following:

[0024] A cutting insert may include a main body and a cutting section fixedly connected to the end of the main body. The upper surface of the cutting section mainly serves to produce and remove chips. Multiple secondary chip-breaking arms and multiple primary chip-breaking arms are sequentially arranged along the direction near the central region of the cutting section within an annular cutting surface. Each set of secondary and primary chip-breaking arms is arranged radially along the cutting section and has a height difference. Thus, the front end of the primary chip-breaking arm and the secondary chip-breaking groove in the secondary chip-breaking arm can form a first chip breaker. Two adjacent sets of primary and secondary chip-breaking arms, along with portions of the cutting surface, form a primary chip-breaking groove, which can be combined to form a second chip breaker. Under conditions of low feed and low depth of cut, the first chip breaker operates, resulting in a thin and narrow cut that easily forms long, fine chips. Furthermore, the action of the first chip breaker allows the cut to form a small curl radius, facilitating chip collection and optimizing the chip removal effect for long, fine chips. Under medium to high feed conditions, the first chip breaker in front has a relatively gentle overall slope and has little impact on cutting resistance. In addition, the front end of the second chip breaker can pre-guide the chips in the chip cover, so that the second chip breaker can play a full role and provide a better chip breaking effect, resulting in better surface quality of the machined workpiece. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

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

[0027] Figure 2 yes Figure 1 The cutting blade is shown in front view;

[0028] Figure 3 yes Figure 1 A side view of the cutting blade is shown;

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

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

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

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

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

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

[0035] Figure 10 This is a partial structural schematic diagram of another cutting blade provided in the embodiments of this application;

[0036] Figure 11 This is a schematic diagram of the structure of a cutting tool provided in this application;

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

[0038] Figure 13 This is a schematic diagram illustrating the effect of machining a workpiece using a cutting tool, as provided in an embodiment of this application.

[0039] The components include: cutting insert 000, main body 100, cutting part 200, first direction f1, second direction f2, upper surface A1, bottom surface A2, flank face A3, cutting surface A11, main chip breaker arm 201, secondary chip breaker arm 202, main cutting edge R, main chip breaker groove C1, secondary chip breaker groove C2, chip breaker arm protrusion 201a, first transition arc groove C11, main chip breaker groove body C12, chip-reversing surface B1 of the main chip breaker groove body, and second transition arc groove C21. The auxiliary chip breaker body C22, the chip-reversing surface B2 of the auxiliary chip breaker body, the first cutting plane FX1, the first target plane SP, the first included angle α1, the second included angle α2, the second cutting plane FX2, the third cutting plane DX1, the fourth cutting plane DX2, the second target plane SZ, the first sub-cutting surface a1, the second sub-cutting surface a2, the third included angle α3, the inclined plane m1, the positioning component 101, the fourth included angle α4, the tool body 001, the positioning surface m2, and the workpiece 11.

[0040] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] It should be understood that the phrase "one embodiment" or "an embodiment" throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of the invention. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification do not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can 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 This is a top view of a cutting blade provided in an embodiment of this application. Figure 2 yes Figure 1The front view of the cutting blade is shown. Figure 3 yes Figure 1 The side view of the cutting blade is shown. Figure 4 yes Figure 1 The diagram shows a partial structural representation of the cutting blade. Figure 5 yes Figure 1 The image shows a cross-sectional view at point PP. The cutting insert 000 may include a main body 100 and a cutting portion 200 fixedly connected to an end of the main body 100. The cutting portion 200 and the main body 100 may be arranged along a first direction f1. Here, the number of cutting portions 200 in the cutting insert 000 may be one or two, and this embodiment does not specifically limit this.

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

[0046] The upper surface A1 of the cutting section 200 in the cutting insert 000 has an annular cutting surface A11, and multiple main chip breaker arms 201 and multiple secondary chip breaker arms 202 arranged in an array around the central axis L of the cutting section 200 within the area enclosed by the annular cutting surface A11. Each secondary chip breaker arm 202 corresponds one-to-one with the corresponding main chip breaker arm 201. Each secondary chip breaker arm 202 connects to the corresponding main chip breaker arm 201 and the cutting surface A11. The ends of two adjacent main chip breaker arms 201 facing away from their corresponding secondary chip breaker arms 202 are connected to each other, and the height of the main chip breaker arm 201 along the second direction f2 is greater than the height of the corresponding secondary chip breaker arm along the second direction (i.e., the main chip breaker arm 201 protrudes beyond the secondary chip breaker arm 202 in the second direction f2). The main cutting edge R can be formed at the junction of the cutting surface A11 and the flank face A3 in the cutting section 200. For example, the boundary shape of the annular cutting surface A11 can be arc-shaped. It should be noted that the cutting part 200 has an irregular shape, and the orthographic projection of the upper surface A1 of the cutting part 200 on the second direction f2 is a circle. The central axis L of the cutting part 200 can be an axis that passes through the origin of the circle and is set parallel to the second direction f2.

[0047] The two adjacent sets of main chip breaker arms 201 and secondary chip breaker arms 202, along with a portion of the cutting surface A11, can form a main chip breaker groove C1. The secondary chip breaker arm 202 can have a secondary chip breaker groove C2 connected to the main chip breaker groove C1. Here, the end of the main chip breaker arm 201 near the main cutting edge R is connected to the end of the secondary chip breaker arm 202 in the secondary chip breaker groove C2 that faces away from the main cutting edge R. That is, the ends of the main chip breaker arm 201 and the secondary chip breaker arm are fixedly connected at this connection point.

[0048] Multiple main chip breaker arms 201 and multiple secondary chip breaker arms 202 can be distributed in a radiating pattern along the center of the cutting section 200, and are equally spaced. For example, the number of main chip breaker arms 201 can be 12, the number of secondary chip breaker arms 202 can also be 12, and the number of main chip breaker grooves C1 and secondary chip breaker grooves C2 can both be 12. It should be noted that the embodiments of this application do not impose a specific limitation on the number of main chip breaker arms 201 and secondary chip breaker arms.

[0049] In this embodiment, the upper surface A1 of the cutting part 200 mainly serves to roll and break chips and remove chips. In the annular cutting surface A11, a plurality of secondary chip-breaking arms 202 and a plurality of primary chip-breaking arms 201 are arranged sequentially along the direction close to the central region of the cutting part 200. Each set of secondary chip-breaking arms 202 and primary chip-breaking arms 201 (i.e., the secondary chip-breaking arm 202 and the corresponding primary chip-breaking arm 201 connected to it) is arranged along the radial direction of the cutting part 200 (the orthographic projection of the upper surface A1 of the cutting part 200 in the second direction f2 is circular, i.e., along the radial direction of the circle) and there is a height difference. Thus, the front end of the main chip breaker 201 and the secondary chip breaker groove C2 in the secondary chip breaker 202 can form a first chip breaker. The two adjacent sets of main chip breaker arms 201 and secondary chip breaker arms 202, along with a portion of the cutting surface A11, form a main chip breaker groove C1. That is, the two sets of main chip breaker arms 201 and the main chip breaker groove C1 formed by the cutting surface A11 can be combined to form a second chip breaker. Under the conditions of low feed and low depth of cut, the first chip breaker operates, resulting in a thin and narrow cut, which easily forms long and thin chips. Furthermore, under the action of the first chip breaker, the cut can form a smaller curl radius, which is beneficial for chip collection and optimizes the chip removal effect of long and thin chips. Under medium to high feed conditions, the first chip breaker in front has a relatively gentle overall slope and has little impact on cutting resistance. In addition, the front end of the second chip breaker can pre-guide the chips in the chip cover, so that the second chip breaker can play a full role and provide a better chip breaking effect, resulting in better surface quality of the machined workpiece.

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

[0051] Please refer to the following in this application: Figure 6 , Figure 7 and Figure 8 , Figure 6 This is a partial structural schematic diagram of another cutting blade provided in an embodiment of this application. Figure 7 yes Figure 6 The top view of the cutting blade is shown. Figure 8 yes Figure 7 A cross-sectional view at AB. The top of the main chip breaker 201 may have an ellipsoidal chip breaker ridge 201a. In the extending direction of this ridge 201a, the width of the ridge gradually increases and then gradually decreases along the direction away from the secondary chip breaker 202. In this case, the front end of the ridge 201a can pre-guide the chips, while the ellipsoidal shape of the ridge allows the second chip breaker to function fully, further providing a superior chip-breaking effect. For example, the ratio of the length of the ridge 201a to the radius Dc of the cutting section 200 can range from 0.65 to 0.8. Here, the orthographic projection of the upper surface A1 of the cutting section 200 in the second direction f2 is circular, and the radius can refer to the radius along this circle.

[0052] In the embodiments of this application, please refer to Figure 6 , Figure 7 , Figure 8 and Figure 9 , Figure 9 yes Figure 7 A cross-sectional view at point AA. The main chip breaker groove C1 in the cutting section 200 may include a first transition arc groove C11 and a main chip breaker groove body C12. The first transition arc groove C11 can be connected between the annular cutting surface A11 and the main chip breaker groove body C12, and the two sides of the groove surface of the first transition arc groove C11 are smoothly connected to the anti-chip surface B1 of the main chip breaker groove body C12 and the cutting surface A11, respectively. In this way, under medium depth of cut and feed conditions, the first transition arc groove C11 can have a good chip rolling effect on the chips. In addition, the anti-chip surface B1 of the main chip breaker groove body C12 guides the chips to the inside of the main chip breaker arm 201, thereby having a good chip breaking effect on the chips.

[0053] Optional, such as Figure 6 , Figure 7 , Figure 8 and Figure 9As shown, the secondary chip breaker groove C2 in the cutting section 200 may include a second transition arc groove C21 and a secondary chip breaker groove body C22. The second transition arc groove C21 connects the cutting surface A11 and the secondary chip breaker groove body C22. The two sides of the groove surface of the second transition arc groove C21 are smoothly connected to the anti-chip surface B2 of the secondary chip breaker groove body C22 and the cutting surface A11, respectively. Multiple second transition arc grooves C21 and multiple first transition arc grooves C11 are distributed at intervals along the circumference of the cutting section 200 and are interconnected. Along the second direction f2, the secondary chip breaker groove body C22 protrudes beyond the main chip breaker groove body C12. Thus, under small depth of cut and small feed conditions, the second transition arc groove C21 can effectively roll the chips. Furthermore, the anti-chip surface B2 of the secondary chip breaker groove body C22 can guide the chips to the front end of the main chip breaker arm 201, thus achieving a good chip breaking effect.

[0054] In the embodiments of this application, such as Figure 6 , Figure 7 , Figure 8 and Figure 9 As shown, several planes are defined in the cutting section 200. The first target plane SP can be a plane coplanar with the plane containing the main cutting edge R 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 cutting plane FX1 can be a plane passing through the connection point between the groove surface of the first transition arc groove C11 and the anti-chip surface B1 of the main chip breaker body C12 and tangent to the anti-chip surface B1 of the main chip breaker body C12. The second cutting plane FX2 can be a plane passing through the connection point between the groove surface of the second transition arc groove C21 and the anti-chip surface B2 of the secondary chip breaker body C22 and tangent to the anti-chip surface B2 of the secondary chip breaker body C22. The third cutting plane DX1 is a plane passing through the bottom of the first transition arc groove C11 and parallel to the first target plane SP. The fourth cutting plane DX2 is a plane passing through the bottom of the second transition arc groove C21 and parallel to the first target plane SP.

[0055] Specifically, a first angle α1 can be formed between the first tangent plane FX1 and the first target plane SP, and a second angle α2 can be formed between the second tangent plane FX2 and the first target plane SP. The second angle α2 can be greater than the first angle α1. Furthermore, the radial width W1 of the first transition arc groove C11 within the first target plane SP can be greater than the radial width W2 of the second transition arc groove C21 within the first target plane SP (the orthographic projection of the upper surface A1 of the cutting part 200 in the second direction f2 is circular; the radial width here refers to the width along the radial direction of this circle). 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 arc groove C11 is the distance along the first direction f1 between the intersection of the first tangent plane FX1 and the first target plane SP and the second target plane SZ. The radial width W2 of the second transition arc groove C21 is the distance along the first direction f1 between the intersection of the second tangent plane FX2 and the first target plane SP and the second target plane SZ.

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

[0057] Optional, such as Figure 7 As shown, an annular rake face K is also distributed on the upper surface A1 of the cutting part 200, between the annular cutting surface A11 and the groove surfaces of the first transition arc groove C11 and the second transition arc groove C21. It should be noted that when the width of the cutting surface A11 is 0, the rake face K and the flank face A3 are connected and intersected to form the main cutting edge R.

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

[0059] In this application, as Figure 7 , Figure 8 and Figure 9 As shown, the main cutting edge R in the cutting section can have a rounded corner, the radius of which can be greater than 0 and less than or equal to 60 micrometers. In this case, the rounded corner of the main cutting edge R is mainly used to protect the cutting edge and avoid chipping under heavy wear, thereby improving the service life of the cutting insert 000. It should be noted that the radius of the main cutting edge in the cutting section can also be 0 micrometers, that is, the main cutting edge R is not rounded.

[0060] In the embodiments of this application, such as Figure 9 As shown, the range of the third included angle α3 between the flank face A3 in the cutting section 200 and the second target plane SZ can be 5 degrees to 8 degrees. The second target plane SZ can be a plane that is perpendicular to the first target plane SP and tangent to the main cutting edge R.

[0061] Optional, please refer to Figure 10 , Figure 10 This is a partial structural schematic diagram of another cutting insert provided in this application embodiment. When there are two cutting portions 200, the height of the main body 100 along the second direction f2 is greater than the height of the cutting portions 200 along the second direction f2, and the side of the main body 100 facing the cutting portions 200 can be an inclined surface m1. The main body 100 can have a positioning member 101 provided on one of the inclined surfaces m1. In this case, by providing the positioning member 101 on one of the inclined surfaces m1 of the main body 100, the two cutting portions 200 in the cutting insert 000 can be distinguished by the positioning member 101, facilitating the operator's control and installation of the cutting insert. For example, when the structures of the two cutting portions 200 are different, or when one cutting portion 200 has been used for a period of time and needs to be replaced with the other cutting portion 200, the positioning member 101 can quickly identify the two cutting portions 200. For example, the range of the fourth included angle α4 between the inclined surface m1 and the first target plane SP can be 120 degrees to 150 degrees.

[0062] In this application, the positioning member 101 provided on the inclined surface m1 of the main body 100 can be a groove. For example, the groove can be a circular groove, a square groove, or an elliptical groove, etc., and this application embodiment does not specifically limit it.

[0063] In summary, this application provides a cutting insert 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 to cut and remove chips. Multiple secondary chip-breaking arms 202 and multiple main chip-breaking arms 201 are sequentially arranged within the annular cutting surface A11 along a direction close to the central region of the cutting part 200. Each set of secondary chip-breaking arms 202 and main chip-breaking arms 201 is arranged radially along the cutting part 200 and has a height difference. Thus, the front end of the main chip-breaking arm 201 and the secondary chip-breaking groove C2 in the secondary chip-breaking arm 202 can form a first chip breaker. Two adjacent sets of main chip-breaking arms 201 and secondary chip-breaking arms 202, along with portions of the cutting surface A11, form a main chip-breaking groove C1, which can be combined to form a second chip breaker. At lower feed rates and depths of cut, the first chip breaker operates, resulting in a thin and narrow cut that easily forms long, fine chips. Furthermore, the first chip breaker helps create a smaller curl radius in the cut, facilitating chip collection and optimizing chip removal. At medium to high feed rates, the first chip breaker, due to its relatively gentle slope, has less impact on cutting resistance. Moreover, the front end of the second chip breaker can pre-guide the chips within the chip cover, allowing it to function fully and providing superior chip breaking performance, resulting in better surface finish on the machined workpiece.

[0064] This application also provides a cutting tool, please refer to... Figure 11 and Figure 12 , Figure 11 This is a schematic diagram of the structure of a cutting tool provided in this application. Figure 12 yes Figure 11 A top view of the cutting tool is shown.

[0065] The cutting tool may include a tool body 001 and a cutting insert 000. The cutting insert 000 is mounted on the tool body 001. That is, by mounting the cutting insert 000 on the tool body 001, the rotation or movement of the tool body 001 drives the cutting insert 000 to perform cutting. The mounting structure between the cutting insert and the tool body is not an improvement of this application. Those skilled in the art can assemble the cutting insert and the tool body according to existing mounting methods, and will not be described in detail here.

[0066] For example, the cutting part 200 may also have a locating surface m2 on the side opposite to the main body 100, which may be perpendicular to the bottom surface A2. The function of the locating surface m2 is to limit the position of the cutting tool after it cooperates with the tool body 001. It should be noted that when a cutting part 200 is provided at each end of the main body 100, the distance from the locating surface m2 in one cutting part 200 to the outermost tangent point of the main cutting edge R of the other cutting part 200 is equal to the distance from the locating surface m2 in the other cutting part 200 to the outermost tangent point of the main cutting edge R of the other cutting part 200. Its main function is to ensure dimensional consistency when changing the cutting part 200 for machining.

[0067] Please refer to Figure 13 , Figure 13 This is a schematic diagram illustrating the effect of machining a workpiece using a cutting tool, as provided in an embodiment of this application. The following describes the machining of an inclined oil groove in an inner hole on one end face using the aforementioned cutting tool. In this machining condition, the chip removal space is narrow; if chips become clogged, it can easily cause tool jamming, leading to tool damage, and in severe cases, machine tool damage. Therefore, a cutting tool with good chip breaking performance is required to meet the machining requirements. 11 is a partial half-sectional view of the workpiece being machined. The workpiece 11 rotates along the central axis SC, and the machined part is the cavity 12.

[0068] The processing steps are as follows:

[0069] (1) Rotate the workpiece 11 along the direction of arrow 13;

[0070] (2) The cutting tool travels along the tool path, so that the rotating workpiece 11 comes into contact with the cutting insert 000 of the cutting tool. The cutting part 200 of the cutting insert 000 performs the machining. Under the action of the second chip breaker, the first roughing is completed. With the cooperation of the second chip breaker, the cutting is smooth and the short chips are smoothly discharged.

[0071] (3) Use the first chip breaker to finish along the contour of the irregular groove again to remove excess material and ensure the dimensional accuracy of the workpiece;

[0072] (4) Move the cutting tool along the D direction to move it away from the workpiece 11.

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

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

Claims

1. A cutting blade, characterized in that, include: The main body portion and the cutting portion fixedly connected to the end of the main body portion, wherein the cutting portion and the main body portion are arranged along a first direction; The cutting part has an upper surface and a bottom surface arranged along a second direction, and a back face connecting the upper surface and the bottom surface, wherein the first direction is perpendicular to the second direction; The upper surface of the cutting part is provided with: an annular cutting surface, and multiple main chip breaker arms and multiple secondary chip breaker arms arranged in an array around the central axis of the cutting part within the area enclosed by the cutting surface. The multiple main chip breaker arms correspond one-to-one with the multiple secondary chip breaker arms. Each secondary chip breaker arm is connected between the corresponding main chip breaker arm and the cutting surface. The ends of two adjacent main chip breaker arms that are away from the corresponding secondary chip breaker arms are connected to each other. The height of the main chip breaker arm along the second direction is greater than the height of the corresponding secondary chip breaker arm along the second direction. The top of the main chip breaker arm has an ellipsoidal chip breaker arm ridge. In the extension direction of the chip breaker arm ridge, the width of the chip breaker arm ridge gradually increases and then gradually decreases along the direction away from the secondary chip breaker arm. The main cutting edge is formed at the junction of the cutting surface and the flank face. The two adjacent sets of main chip breaker arms and secondary chip breaker arms, along with a portion of the cutting surface, form a main chip breaker groove. The secondary chip breaker arm has a secondary chip breaker groove connected to the main chip breaker groove. The end of the main chip breaker arm near the main cutting edge is connected to the end of the secondary chip breaker arm in the secondary chip breaker groove that is away from the main cutting edge. The ends of the main chip breaker arm and the ends of the secondary chip breaker arm are fixedly connected at this connection point.

2. The cutting blade 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 connects the cutting surface and the main chip breaker groove body. The two 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 blade according to claim 2, characterized in that, The secondary chip breaker groove includes: a second transition arc groove and a secondary chip breaker groove body. The second transition arc groove connects the cutting surface and the secondary chip breaker groove body. The two sides of the groove surface of the second transition arc groove are smoothly connected to the anti-chip surface of the secondary chip breaker groove body and the cutting surface, respectively. The plurality of second transition arc grooves and the plurality of first transition arc grooves are distributed at intervals along the circumference of the cutting part and are interconnected, and along the second direction, the secondary 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 tangent plane forms a first angle with the first target plane, a second tangent plane forms a second angle with the first target plane, the second angle is greater than the first angle, and the radial width of the first transition arc groove is greater than the radial width of the second transition arc groove, the first transition arc groove and the second transition arc groove have the same depth in the second direction; Wherein, 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 point between the groove surface of the first transition arc groove and the anti-chip surface of the main chip breaker body and tangent to the anti-chip surface of the main chip breaker body; the second tangent plane is: a plane passing through the connection point between the groove surface of the second transition arc groove and the anti-chip surface of the secondary chip breaker body and tangent to the anti-chip surface of the secondary chip breaker body.

5. The cutting insert according to claim 3, characterized in that, The upper surface of the cutting part is also provided with an annular rake face located between the cutting surface and the groove surface of the first transition arc groove and the groove surface of the second transition arc groove.

6. The cutting blade according to claim 5, characterized in that, The annular cutting surface includes: a blunt fillet distributed on the main cutting edge, and a cutting width region connecting the blunt fillet and the rake face, wherein the radial width of the cutting width region ranges from 0 mm to 0.2 mm.

7. The cutting blade according to claim 1, characterized in that, The ratio of the length of the chip-breaking arm protrusion to the radius of the cutting part is in the range of 0.65 to 0.

8.

8. The cutting blade according to claim 4, characterized in that, The range of the third included angle between the back face and the second target plane is 5 degrees to 8 degrees. The second target plane is a plane that is perpendicular to the first target plane and tangent to the main cutting edge.

9. The cutting insert according to any one of claims 1-6, characterized in that, When there are two cutting parts, the height of the main body in the second direction is greater than the height of the cutting part in the second direction, and the side of the main body facing the cutting part is an inclined surface, and the main body has a positioning member provided on one of the inclined surfaces.

Images