Cutting insert and cutting tool

Abstract

The application discloses a cutting blade and a cutting tool, and relates to the field of tools.The cutting blade comprises a blade body, a cutting part arranged on at least one side of the blade body along the length direction of the blade body, the cutting part has a first relief surface, a first clearance surface and a second relief surface connected in sequence, the first relief surface, the first clearance surface and the second relief surface all extend along the thickness direction of the blade body, the first clearance surface is arranged in a recessed mode towards the blade body to form a chip separation groove, a first surface is formed on one side of the cutting part along the thickness direction, the first relief surface, the first clearance surface and the second relief surface respectively intersect with the first surface, and the intersection positions are provided with a first cutting edge, a first clearance edge and a second cutting edge; along the width direction, the projection of the first clearance surface is located inside the projection of the second relief surface. Thus, the cutting blade can realize clearance at the same time in the feeding and cutting depth directions, the cutting force is reduced, and the service life of the cutting blade is prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of cutters, in particular to a cutting insert and a cutting tool. BACKGROUND

[0002] In the related art, in the process of metal cutting, the feed speed is usually increased to achieve high metal removal rate, so as to improve the machining efficiency. The conventional fast feed cutting process has the characteristics of large feed speed and small cutting depth. If the machining efficiency is to be improved, the cutting depth needs to be increased while maintaining the large feed speed, thereby causing excessive cutting force and problems such as rapid tool wear and even collapse and rupture.

[0003] At present, in order to reduce the cutting force, the cutting edge is usually divided into a plurality of separated main cutting edges, so that the chips generated during the cutting action are divided into a plurality of small chips to achieve the effect of reducing the cutting force. However, the existing cutting insert only forms an effective clearance in the feed direction, and another different type of cutting insert needs to be used together to form an effective clearance in the cutting depth direction, which requires high manufacturing precision and installation precision of the cutting insert and the cutting tool, and also brings certain difficulties to the installation and management of the cutting insert, thereby increasing the overall cost. SUMMARY

[0004] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, one object of the present application is to provide a cutting insert capable of achieving clearance in both the feed and cutting depth directions, reducing the cutting force, and improving the service life of the cutting insert.

[0005] The present application also provides a cutting tool having the above cutting insert.

[0006] The cutting insert according to the embodiments of the present application comprises: a cutting insert body; a cutting portion provided on at least one side of the cutting insert body along the length direction thereof, the side of the cutting portion away from the cutting insert body having a first relief surface, a first clearance surface and a second relief surface connected in sequence along the width direction of the cutting insert body, the first relief surface, the first clearance surface and the second relief surface all extending along the thickness direction of the cutting insert body, and the first clearance surface being recessed towards the cutting insert body to form a chip separation groove, a first surface being formed on one side of the cutting portion along the thickness direction, the first relief surface, the first clearance surface and the second relief surface respectively intersecting with the first surface and the intersection forming a first cutting edge, a first clearance edge and a second cutting edge; and wherein, along the width direction, the projection of the first clearance surface is located inside the projection of the second relief surface.

[0007] According to the cutting insert provided by the embodiment of the present application, the projection of the first clearance surface along the width direction is located inside the projection of the second relief surface along the width direction, and the first clearance surface can be recessed towards the insert body to form a chip separation groove, the first relief surface, the first clearance surface and the second relief surface respectively intersect with the first surface and form the first cutting edge, the first clearance edge and the second cutting edge at the intersection, so that the first clearance edge does not participate in cutting to form a clearance area when the cutting insert works, and precise clearance is realized in the feed direction and the depth of cut direction at the same time, the cutting force generated in the cutting process is significantly reduced, the service life of the cutting insert is improved, the frequency of replacing the insert is reduced, the production cost is reduced, and the machining efficiency and the machining quality stability are improved.

[0008] In some embodiments of the present application, the first clearance surface includes a first circular-arc clearance surface and a first planar clearance surface, the first circular-arc clearance surface is connected with the first relief surface, the first planar clearance surface is connected with the second relief surface, the first circular-arc clearance surface and the first planar clearance surface respectively intersect with the first surface and form the first circular-arc clearance edge and the first straight-line clearance edge at the intersection, the first circular-arc clearance edge and the first straight-line clearance edge are connected and constitute the first clearance edge; the cutting portion away from one side of the insert body also has a first transition surface, the first transition surface is located between the first planar clearance surface and the second relief surface and is connected with the first planar clearance surface and the second relief surface respectively, the first transition surface intersects with the first surface and forms the first transition edge at the intersection, and the first transition edge is connected with the first straight-line clearance edge and the second cutting edge respectively.

[0009] In some embodiments of the present application, the maximum distance of the first circular-arc clearance edge and the first transition edge along the length direction is H, and 0.15mm≤H≤0.5mm is satisfied, and the distance between the highest point of the first circular-arc clearance edge along the length direction and the lowest point of the first transition edge along the length direction in the width direction is L and L>H is satisfied.

[0010] In some embodiments of the present application, the second relief surface is a plane, the intersection of the extension line of the first straight-line clearance edge and the extension line of the second cutting edge is located outside the cutting portion, the angle between the extension direction of the second cutting edge and the width direction is α and 10°≤α≤30° is satisfied, and the angle between the extension direction of the first straight-line clearance edge and the width direction is β and 10°≤β≤30° is satisfied.

[0011] In some embodiments of the present application, the first relief surface comprises a first circular-arc relief surface and a second circular-arc relief surface, the second circular-arc relief surface is connected with the first circular-arc clearance surface, the first circular-arc relief surface and the second circular-arc relief surface respectively intersect with the first surface and form a first circular-arc cutting edge and a second circular-arc cutting edge at the intersection, the first circular-arc cutting edge and the second circular-arc cutting edge are connected and constitute the first cutting edge; the insert body is formed with a mounting hole penetratingly arranged along the thickness direction, the intersection of the center line of the mounting hole and the plane in which the first surface is located is defined as a center point, the shortest distance between the first circular-arc cutting edge and the center point is greater than the maximum distance between the first transition edge and the center point, and the minimum distance between the first transition edge and the center point is greater than the maximum distance between the first circular-arc clearance edge and the center point.

[0012] In some embodiments of the present application, the first circular-arc cutting edge and the second circular-arc cutting edge are both convex along the thickness direction towards the direction away from the insert body, and the intersection point of the first circular-arc cutting edge and the second circular-arc cutting edge is the highest point of the cutting portion along the thickness direction.

[0013] In some embodiments of the present application, both sides of the insert body along the thickness direction are formed with flat surfaces, the first surface is formed with a chip flute recessedly arranged towards the inside of the cutting portion, the chip flute comprises a rake surface and a counter surface connected in sequence along the length direction, the rake surface respectively intersects with the first relief surface, the first clearance surface, the second relief surface and the first transition surface, and the counter surface is connected with the flat surface; wherein the rake surface and the counter surface both extend obliquely towards the inside of the cutting portion.

[0014] In some embodiments of the present application, the rake surface comprises a first planar rake surface, a first circular-arc rake surface, a second planar rake surface, a second circular-arc rake surface and a third planar rake surface connected in sequence along the width direction, the first circular-arc rake surface is recessedly arranged towards the inside of the cutting portion, and the second circular-arc rake surface is convexly arranged towards the direction away from the cutting portion; wherein the radius of the first circular-arc rake surface is R1, the radius of the second circular-arc rake surface is R2, and R1>R2 is satisfied.

[0015] In some embodiments of the present application, the cutting portion has, in sequence, a third circular-arc relief surface, a second circular-arc clearance surface, a second planar clearance surface, a second transition surface and a third relief surface connected in sequence away from one side of the blade body, the third circular-arc relief surface, the second circular-arc clearance surface, the second planar clearance surface, the second transition surface and the third relief surface are respectively arranged symmetrically to the second circular-arc relief surface, the first circular-arc clearance surface, the first planar clearance surface, the first transition surface and the second relief surface relative to the first circular-arc relief surface; the other side of the cutting portion along the thickness direction is formed with a second surface, the second surface is formed with the chip flute recessed towards the inside of the cutting portion, the third circular-arc relief surface, the second circular-arc clearance surface, the second planar clearance surface, the second transition surface and the third relief surface respectively intersect with the second surface and the intersection is formed with a third circular-arc cutting edge, a second circular-arc clearance edge, a second straight-line clearance edge, a second transition edge and a third cutting edge.

[0016] A cutting tool according to embodiments of the present application is described below.

[0017] A cutting tool according to embodiments of the present application includes a tool body and the cutting blade of the above-mentioned embodiments, the tool body has a plurality of mounting grooves arranged at intervals in the circumferential direction; the cutting blade is a plurality of, a plurality of the cutting blades are arranged one-to-one with a plurality of the mounting grooves and connected.

[0018] Since the cutting tool according to embodiments of the present application has the tool body and the cutting blade of the above-mentioned embodiments, when cutting a workpiece, it can simultaneously realize accurate clearance in the feed direction and the cutting depth direction, significantly reduce the cutting force generated during cutting, improve the service life of the cutting blade, reduce the frequency of replacing the blade, reduce production costs, improve processing efficiency and processing quality stability.

[0019] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter in the description. BRIEF DESCRIPTION OF DRAWINGS

[0020] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description, including the appended drawings, wherein:

[0021] Figure 1 is a structural schematic diagram of a cutting blade according to embodiments of the present application;

[0022] Figure 2 is Figure 1 is a top view schematic diagram of the cutting blade in FIG. 1;

[0023] Figure 3 is Figure 2 is a partial enlarged schematic diagram of circle A in FIG. 2;

[0024] Figure 4 is Figure 1 a side view of a cutting insert;

[0025] Figure 5 is Figure 1 a front view of a cutting insert;

[0026] Figure 6 is an exploded view of a cutting tool according to an embodiment of the present application;

[0027] Figure 7 is Figure 6 a schematic view of a cutting tool in a cutting state;

[0028] Figure 8 is Figure 7 a partial enlarged view of the circle B.

[0029] Reference signs:

[0030] 10, cutting insert;

[0031] 11, insert body; 111, mounting hole; 112, flat surface; 12, cutting portion; 121, first relief surface; 1211, first circular-arc relief surface; 1212, second circular-arc relief surface; 122, first clearance surface; 1221, first circular-arc clearance surface; 1222, first planar clearance surface; 1223, chip-separating groove; 123, second relief surface; 1241, first surface; 1242, second surface; 125, first transition surface; 126, third circular-arc relief surface; 127, second circular-arc clearance surface; 128, second planar clearance surface; 129, second transition surface; 1210, third relief surface; 120, convex-circular-arc transition surface;

[0032] 131, first cutting edge; 1311, first circular-arc cutting edge; 1312, second circular-arc cutting edge; 132, first clearance edge; 1321, first circular-arc clearance edge; 1322, first straight clearance edge; 133, second cutting edge; 134, first transition edge; 135, third circular-arc cutting edge; 136, second circular-arc clearance edge; 137, second straight clearance edge; 138, second transition edge; 139, third cutting edge;

[0033] 14, chip flute; 141, rake surface; 1411, first planar rake surface; 1412, first circular-arc rake surface; 1413, second planar rake surface; 1414, second circular-arc rake surface; 1415, third planar rake surface; 142, chip breaker surface; 101, bolt;

[0034] 20, cutting tool; 21, tool body; 211, mounting groove. DETAILED DESCRIPTION

[0035] Embodiments of the present application are described below in detail, examples of which are shown in the accompanying 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 for the purpose of explanation only, and are not to be taken as limiting of the present application.

[0036] Reference is made below to Figures 1-8 A cutting insert 10 according to an embodiment of the present application is described, which includes an insert body 11 and a cutting portion 12.

[0037] The cutting portion 12 is arranged at at least one side of the insert body 11 along the length direction thereof, and the side of the cutting portion 12 away from the insert body 11 has a first relief surface 121, a first clearance surface 122 and a second relief surface 123 connected in sequence along the width direction of the insert body 11, the first relief surface 121, the first clearance surface 122 and the second relief surface 123 all extend along the thickness direction of the insert body 11, and the first clearance surface 122 is arranged concavely towards the insert body 11 to form a chip separation groove 1223, and a first surface 1241 is formed at one side of the cutting portion 12 along the thickness direction, and the first relief surface 121, the first clearance surface 122 and the second relief surface 123 respectively intersect with the first surface 1241 and the intersection forms a first cutting edge 131, a first clearance edge 132 and a second cutting edge 133. Wherein, along the width direction, the projection of the first clearance surface 122 is located inside the projection of the second relief surface 123.

[0038] At present, in order to reduce the cutting force, the cutting edge is usually divided into a plurality of separated main cutting edges, so that the chips generated during the cutting action are divided into a plurality of small chips to achieve the effect of reducing the cutting force. However, the existing insert only forms an effective clearance in the feed direction, and another different type of insert needs to be used together to form an effective clearance in the depth direction, which requires higher manufacturing and installation precision of the insert and the tool, and also brings certain difficulties to the installation and management of the insert, increasing the overall cost.

[0039] To this end, the present application provides a cutting insert 10 which can simultaneously realize clearance in the feed and depth directions, reduce the cutting force and improve the service life of the cutting insert 10.

[0040] As shown in Figure 1 and Figure 3 Specifically, the cutting insert 10 includes an insert body 11 and a cutting portion 12, and the cutting portion 12 can be arranged at one side of the insert body 11 along the length direction thereof (such as the left side in the drawings), and the side of the cutting portion 12 away from the insert body 11 has a first relief surface 121, a first clearance surface 122 and a second relief surface 123 connected in sequence along the width direction of the insert body 11. Figure 1The cutting portion 12 can be arranged on at least one side of the insert body 11 in the X direction shown in FIG. 1, and optionally, when the cutting portion 12 is arranged on both sides of the insert body 11 in the length direction, the cutting portions 12 on both sides can be arranged symmetrically with respect to the center of the insert body 11. The side of the cutting portion 12 away from the insert body 11 can have a first relief surface 121, a first clearance surface 122, and a second relief surface 123, which can be connected in sequence in the width direction (Y direction shown in FIG. 1) of the insert body 11, wherein the first relief surface 121, the first clearance surface 122, and the second relief surface 123 can extend in the thickness direction (Z direction shown in FIG. 1) of the insert body 11, and the first clearance surface 122 can be arranged concavely towards the insert body 11 to form a chip separation groove 1223, which can achieve the effect of breaking the chip. Figure 1 The cutting portion 12 can be arranged on at least one side of the insert body 11 in the X direction shown in FIG. 1, and optionally, when the cutting portion 12 is arranged on both sides of the insert body 11 in the length direction, the cutting portions 12 on both sides can be arranged symmetrically with respect to the center of the insert body 11. The side of the cutting portion 12 away from the insert body 11 can have a first relief surface 121, a first clearance surface 122, and a second relief surface 123, which can be connected in sequence in the width direction (Y direction shown in FIG. 1) of the insert body 11, wherein the first relief surface 121, the first clearance surface 122, and the second relief surface 123 can extend in the thickness direction (Z direction shown in FIG. 1) of the insert body 11, and the first clearance surface 122 can be arranged concavely towards the insert body 11 to form a chip separation groove 1223, which can achieve the effect of breaking the chip. Figure 1 The cutting portion 12 can be arranged on at least one side of the insert body 11 in the X direction shown in FIG. 1, and optionally, when the cutting portion 12 is arranged on both sides of the insert body 11 in the length direction, the cutting portions 12 on both sides can be arranged symmetrically with respect to the center of the insert body 11. The side of the cutting portion 12 away from the insert body 11 can have a first relief surface 121, a first clearance surface 122, and a second relief surface 123, which can be connected in sequence in the width direction (Y direction shown in FIG. 1) of the insert body 11, wherein the first relief surface 121, the first clearance surface 122, and the second relief surface 123 can extend in the thickness direction (Z direction shown in FIG. 1) of the insert body 11, and the first clearance surface 122 can be arranged concavely towards the insert body 11 to form a chip separation groove 1223, which can achieve the effect of breaking the chip.

[0041] Further, the cutting portion 12 can be formed with a first surface 1241 on one side in the thickness direction, the first relief surface 121, the first clearance surface 122, and the second relief surface 123 can respectively intersect the first surface 1241, and the intersection of the first relief surface 121, the first clearance surface 122, and the second relief surface 123 with the first surface 1241 can be formed with a first cutting edge 131, a first clearance edge 132, and a second cutting edge 133, wherein in the width direction, the projection of the first clearance surface 122 is located inside the projection of the second relief surface 123, it can be understood that the projection of the first clearance surface 122 in a plane perpendicular to the width direction is located inside the projection of the second relief surface 123 in the plane perpendicular to the width direction, such arrangement can ensure that the first clearance edge 132 does not participate in cutting when the cutting insert 10 is cutting, therefore, when the cutting insert 10 works, the cutting insert 10 moves in the feed direction, the second cutting edge 133 and the first cutting edge 131 participate in cutting in sequence, the first clearance edge 132 does not participate in cutting, so that the chip separation groove 1223 can break the chip, the second cutting edge 133 produces a piece of chip, the first cutting edge 131 produces a piece of chip, so that the chip is divided into two pieces, reducing the chip force.

[0042] In short, the first relief surface 122 of the cutting insert 10 of the embodiments of the present application is located inside the projection of the second relief surface 123 along the width direction, and the first relief surface 122 can be recessed towards the insert body 11 to form a chip separation groove 1223, the first relief surface 122, the first relief surface 122 and the second relief surface 123 respectively intersect the first surface 1241 and form the first cutting edge 131, the first relief edge 132 and the second cutting edge 133 at the intersection, so that when the cutting insert 10 works, the first relief edge 132 does not participate in cutting to form a relief area, and precise relief is achieved in the feed direction and the depth of cut direction, significantly reducing the cutting force generated during cutting, improving the service life of the cutting insert 10, reducing the frequency of replacing the insert, reducing production cost, improving processing efficiency and processing quality stability.

[0043] As shown in Figure 1 and Figure 5 In some embodiments of the present application, the first relief surface 122 includes a first circular arc relief surface 1221 and a first flat relief surface 1222, the first circular arc relief surface 1221 is connected with the first relief surface 121, the first flat relief surface 1222 is connected with the second relief surface 123, the first circular arc relief surface 1221 and the first flat relief surface 1222 respectively intersect the first surface 1241, and the first circular arc relief surface 1221 and the first flat relief surface 1222 intersect the first surface 1241 to form a first circular arc relief edge 1321 and a first straight line relief edge 1322, the first circular arc relief edge 1321 and the first straight line relief edge 1322 are connected, and the first circular arc relief edge 1321 and the first straight line relief edge 1322 are connected to form the first relief edge 132, the cutting part 12 away from the insert body 11 side also has a first transition surface 125, the first transition surface 125 is located between the first flat relief surface 1222 and the second relief surface 123, and the first transition surface 125 is connected with the first flat relief surface 1222 and the second relief surface 123 respectively, the first transition surface 125 intersects the first surface 1241 and forms a first transition edge 134 at the intersection, the first transition edge 134 is connected with the first straight line relief edge 1322 and the second cutting edge 133 respectively, which is beneficial to the machining of the cutting insert 10, ensures the smooth and continuous connection between the first transition edge 134 and the first straight line relief edge 1322 and the second cutting edge 133, and there is no obvious corner and mutation, so that the cutting insert 10 realizes smooth transition during cutting, reduces cutting vibration and noise, and improves the quality of the machined surface.

[0044] As shown in Figure 2As shown, in some embodiments of the present application, the maximum distance of the first arc-shaped clearance blade 1321 and the first transition blade 134 along the length direction is H, which satisfies the relationship: 0.15mm≤H≤0.5mm. It can be understood that the maximum distance of the first arc-shaped clearance blade 1321 and the first transition blade 134 along the length direction can be any value between 0.15mm and 0.5mm, for example, the maximum distance of the first arc-shaped clearance blade 1321 and the first transition blade 134 along the length direction can be, but is not limited to, 0.15mm, 0.25mm, 0.4mm, 0.5mm, etc., the distance between the highest point of the first arc-shaped clearance blade 1321 along the length direction and the lowest point of the first transition blade 134 along the length direction in the width direction is L, which satisfies the relationship: L>H. It can be understood that the distance between the highest point of the first arc-shaped clearance blade 1321 along the length direction and the lowest point of the first transition blade 134 along the length direction in the width direction is greater than the maximum distance of the first arc-shaped clearance blade 1321 and the first transition blade 134 along the length direction. Such arrangement can ensure that an empty area can be formed at the chip separation groove 1223, so that the chip can be divided into two sections, and by setting the maximum distance H of the first arc-shaped clearance blade 1321 and the first transition blade 134 along the length direction and the distance L between the highest point of the first arc-shaped clearance blade 1321 along the length direction and the lowest point of the first transition blade 134 along the length direction in the width direction within the above range, it can be ensured that the chip can still be split at a larger feed speed. In some embodiments, the distance between the highest point of the first arc-shaped clearance blade 1321 along the length direction and the lowest point of the first transition blade 134 along the length direction in the width direction is preferably: L>3H.

[0045] In some embodiments of the present application, the second relief surface 123 is a plane, and the second relief surface 123 and the first surface 1241 can jointly form a positioning surface mounted on the tool body 21, and the plane is more suitable for mounting positioning than the curved surface, and the corresponding part of the tool body 21 is simple to process and has high precision. Therefore, by configuring the second relief surface 123 as a plane, the cutting insert 10 can be installed more firmly.

[0046] As Figure 2As shown, further, the intersection of the extension line of the first straight clearance edge 1322 and the extension line of the second cutting edge 133 is located outside the cutting portion 12, which can ensure that the second cutting edge 133 and the first cutting edge 131 participate in cutting in turn and the first clearance edge 132 does not participate in cutting when the cutting insert 10 is cutting. The angle between the extension direction of the second cutting edge 133 and the width direction is α, which satisfies the relationship: 10°≤α≤30°. It can be understood that the angle between the extension direction of the second cutting edge 133 and the width direction can be any value between 10° and 30°, for example, but not limited to, 10°, 15°, 20°, 25°, 30°, etc. The angle between the extension direction of the first straight clearance edge 1322 and the width direction is β, which satisfies the relationship: 10°≤β≤30°. It can be understood that the angle between the extension direction of the first straight clearance edge 1322 and the width direction can be any value between 10° and 30°, for example, but not limited to, 10°, 15°, 20°, 25°, 30°, etc. In some embodiments, the angle α between the extension direction of the second cutting edge 133 and the width direction and the angle β between the extension direction of the first straight clearance edge 1322 and the width direction satisfy the relationship: α+β=40°. Such arrangement can ensure that when α takes a larger value, β takes a smaller value, and vice versa, thereby ensuring that an avoidance area is formed at the first clearance surface 122 and the chip is split as α changes.

[0047] As shown in FIG. 1, the first cutting edge 131 and the second cutting edge 133 are arranged on the first surface 1241, and the first cutting edge 131 and the second cutting edge 133 are arranged on the first surface 1241 in a staggered manner. Figure 1 and Figure 3 As shown in FIG. 1, the first cutting edge 131 and the second cutting edge 133 are arranged on the first surface 1241, and the first cutting edge 131 and the second cutting edge 133 are arranged on the first surface 1241 in a staggered manner. As shown in FIG. 1, the first cutting edge 131 and the second cutting edge 133 are arranged on the first surface 1241, and the first cutting edge 131 and the second cutting edge 133 are arranged on the first surface 1241 in a staggered manner. As shown in FIG. 1, the first cutting edge 131 and the second cutting edge 133 are arranged on the first surface 1241, and the first cutting edge 131 and the second cutting edge 133 are arranged on the first surface 1241 in a staggered manner.

[0048] In some embodiments, the first arc-shaped flank face 1211 may be located at the bottom of the cutting insert 10 along its length, which can improve the surface quality of the workpiece after machining.

[0049] Furthermore, the blade body 11 can be formed with a mounting hole 111 that extends through the thickness direction. The intersection of the center line of the mounting hole 111 and the plane where the first surface 1241 is located is defined as the center point. The shortest distance between the first arc cutting edge 1311 and the center point is greater than the maximum distance between the first transition edge 134 and the center point. The minimum distance between the first transition edge 134 and the center point is greater than the maximum distance between the first arc clearance edge 1321 and the center point. This arrangement can ensure that the cutting blade 10 moves along the feed direction. The second cutting edge 133 and the first cutting edge 131 participate in cutting in sequence, while the first clearance edge 132 does not participate in cutting. This allows the chip separation groove 1223 to split the chip. The second cutting edge 133 generates a chip, and the first cutting edge 131 generates a chip, thus dividing the chip into two segments and reducing the chip force.

[0050] like Figure 5 As shown, in some embodiments of this application, the first arc cutting edge 1311 and the second arc cutting edge 1312 both protrude in the direction away from the blade body 11 along the thickness direction, and the intersection point of the first arc cutting edge 1311 and the second arc cutting edge 1312 is the highest point of the cutting part 12 along the thickness direction. This arrangement can ensure that the highest point of the cutting blade 10 contacts the workpiece first during the cutting process. It can be understood that the first arc cutting edge 1311 and the second arc cutting edge 1312 contact the workpiece first, so that the tips of the first arc cutting edge 1311 and the second arc cutting edge 1312 cut in, making the cutting blade 10 sharper and reducing the cutting force.

[0051] like Figure 1 As shown, in some embodiments of this application, the blade body 11 has flat surfaces 112 formed on both sides along the thickness direction, and a chip removal groove 14 recessed towards the inside of the cutting part 12 is formed on the first surface 1241. The chip removal groove 14 may include a rake face 141 and a chip-removing surface 142. The rake face 141 and the chip-removing surface 142 can be connected sequentially along the length direction, and the rake face 141 can be connected to the first flank face 121, the first clearance surface 122, the second flank face 123, and the first clearance surface 122, respectively. The transition surface 125 intersects, and the anti-chip surface 142 can be connected to the flat surface 112. The rake face 141 and the anti-chip surface 142 both extend inclinedly toward the inside of the cutting part 12, so that the intersection of the rake face 141 with the first flank face 121, the first clearance surface 122, the second flank face 123 and the first transition surface 125 has a sharp rake angle, making the cutting edge sharper and reducing the cutting force. The anti-chip surface 142 is inclined in the opposite direction to the rake face 141, causing it to curl and deform, which is beneficial for chip breaking and chip removal.

[0052] As shown in Figure 1 and Figure 3 In some embodiments of the present application, the rake face 141 can include a first planar rake face 1411, a first arc rake face 1412, a second planar rake face 1413, a second arc rake face 1414, and a third planar rake face 1415, which can be connected in sequence along the width direction, and the first arc rake face 1412 can be recessed towards the inside of the cutting portion 12, and the second arc rake face 1414 can be convexly arranged away from the cutting portion 12. In some embodiments, the center of curvature of the first arc rake face 1412 can be located outside the cutting portion 12, and the center of curvature of the second arc rake face 1414 can be located inside the cutting portion 12. It can be understood that the second arc rake face 1414 can reduce the resistance when the cutting insert 10 cuts into the workpiece, and reduce the cutting force, and the first arc rake face 1412 allows the first planar rake face 1411 to have a certain chip removal effect, so that the chips are discharged towards the outside of the cutting tool 20, avoiding the accumulation of chips in the center of the tool.

[0053] Further, the radius of the first arc rake face 1412 is R1, and the radius of the second arc rake face 1414 is R2, which satisfies the relationship R1>R2, that is, the radius of the first arc rake face 1412 is greater than the radius of the second arc rake face 1414. By changing the tendency of chip removal of the chip groove 14 through the first arc rake face 1412, the direction of the chips discharged through the second planar rake face 1413 and the first planar rake face 1411 is different, so that the chips are not stacked, and the radius of the first arc rake face 1412 is larger, so that the chip discharge direction is more open, which is beneficial to the smooth discharge of the chips.

[0054] As shown in Figure 1 and Figure 5 In some embodiments of the present application, the side of the cutting portion 12 away from the insert body 11 can also have a convex arc transition surface 120, which can be connected with the second clearance face 123 and the side surface of the insert body 11 along the width direction, respectively. The convex arc transition surface 120 is farther away from the center point than the side surface along the width direction, so as to ensure that the round corner at the convex arc transition surface 120 can protect the second cutting edge 133.

[0055] As shown in Figure 1 and Figure 5As shown, in some embodiments of the present application, the cutting portion 12 has a third circular-arc relief surface 126, a second circular-arc clearance surface 127, a second planar clearance surface 128, a second transition surface 129 and a third relief surface 1210 connected in sequence away from one side of the insert body 11, the third circular-arc relief surface 126, the second circular-arc clearance surface 127, the second planar clearance surface 128, the second transition surface 129 and the third relief surface 1210 are respectively arranged symmetrically to the second circular-arc relief surface 1212, the first circular-arc clearance surface 1221, the first planar clearance surface 1222, the first transition surface 125 and the second relief surface 123 relative to the first circular-arc relief surface 1211, the other side of the cutting portion 12 in the thickness direction is formed with a second surface 1242, the second surface 1242 is formed with a chip flute 14 recessed towards the inside of the cutting portion 12, the third circular-arc relief surface 126, the second circular-arc clearance surface 127, the second planar clearance surface 128, the second transition surface 129 and the third relief surface 1210 respectively intersect the second surface 1242 and the intersection is formed with a third circular-arc cutting edge 135, a second circular-arc clearance edge 136, a second straight-line clearance edge 137, a second transition edge 138 and a third cutting edge 139, such arrangement can make the insert have central symmetry, when the edge on one side of the first surface 1241 is damaged, the edge on one side of the second surface 1242 can be used, which is beneficial to improve the service life of the cutting insert 10, and the above structure is beneficial to the machining of the cutting insert 10.

[0056] As Figures 6 to 8 shown below describes the cutting tool 20 of the embodiments of the present application.

[0057] According to the cutting tool 20 having the insert body 21 and the cutting insert 10 of the above embodiments, the insert body 21 can have a plurality of mounting grooves 211 arranged at intervals in the circumferential direction, the number of cutting inserts 10 can be multiple, and the plurality of cutting inserts 10 can be arranged and connected one by one with the plurality of mounting grooves 211, and optionally, the cutting insert 10 and the mounting groove 211 can be detachably connected through screws or bolts 101. The feed direction of the cutting tool 20 is the a direction shown in Figure 7 , and the rotation direction (the cutting depth direction of multiple angles) of the cutting tool 20 is the b direction shown in Figure 7 .

[0058] Due to the cutting tool 20 having the insert body 21 and the cutting insert 10 of the above embodiments, when cutting a workpiece, the cutting tool 20 can simultaneously achieve precise clearance in the feed direction and the cutting depth direction, significantly reduce the cutting force generated during cutting, improve the service life of the cutting insert 10, reduce the frequency of replacing the insert, reduce production costs, improve machining efficiency and machining quality stability.

[0059] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and do 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 limiting the present application.

[0060] In the description of the present application, "first feature" and "second feature" can include one or more of the features.

[0061] In the description of the present application, "a plurality of" means two or more.

[0062] In the description of the present application, "above" or "below" the first feature of the second feature can include that the first and second features are in direct contact, or can include that the first and second features are not in direct contact but are in contact through another feature between them.

[0063] In the description of the present application, "above", "over" and "on" the first feature of the second feature includes that the first feature is directly above and obliquely above the second feature, or only means that the first feature is higher than the second feature in horizontal height.

[0064] In the description of the present application, 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. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0065] Although 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 utility model relates to a cutting tool insert, comprising: a blade body (11); a cutting part (12) arranged on at least one side of the blade body (11) along the length direction of the blade body (11), the side of the cutting part (12) away from the blade body (11) being provided with a first relief surface (121), a first clearance surface (122) and a second relief surface (123) connected in sequence along the width direction of the blade body (11), the first relief surface (121), the first clearance surface (122) and the second relief surface (123) all extending along the thickness direction of the blade body (11), and the first clearance surface (122) being recessed towards the blade body (11) to form a chip separation groove (1223), a first surface (1241) being formed on one side of the cutting part (12) along the thickness direction, the first relief surface (121), the first clearance surface (122) and the second relief surface (123) respectively intersecting the first surface (1241) and the intersection forming a first cutting edge (131), a first clearance edge (132) and a second cutting edge (133); wherein, along the width direction, the projection of the first clearance surface (122) is located inside the projection of the second relief surface (123).

2. The cutting insert according to claim 1, characterized in that, The first clearance surface (122) comprises a first circular-arc clearance surface (1221) and a first planar clearance surface (1222), the first circular-arc clearance surface (1221) being connected with the first relief surface (121), the first planar clearance surface (1222) being connected with the second relief surface (123), the first circular-arc clearance surface (1221) and the first planar clearance surface (1222) respectively intersecting the first surface (1241) and the intersection forming a first circular-arc clearance edge (1321) and a first straight-line clearance edge (1322), the first circular-arc clearance edge (1321) and the first straight-line clearance edge (1322) being connected and constituting the first clearance edge (132); the side of the cutting part (12) away from the blade body (11) further having a first transition surface (125) located between the first planar clearance surface (1222) and the second relief surface (123) and connected with the first planar clearance surface (1222) and the second relief surface (123) respectively, the first transition surface (125) intersecting the first surface (1241) and the intersection forming a first transition edge (134), the first transition edge (134) being connected with the first straight-line clearance edge (1322) and the second cutting edge (133) respectively.

3. The cutting insert according to claim 2, characterized in that, The maximum distance of the first circular-arc clearance edge (1321) and the first transition edge (134) along the length direction is H, and 0.15mm≤H≤0.5mm is satisfied, and the distance of the highest point of the first circular-arc clearance edge (1321) along the length direction and the lowest point of the first transition edge (134) along the length direction in the width direction is L and L>H is satisfied.

4. The cutting insert according to claim 2, characterized in that, The second relief surface (123) is a plane, an extension line of the first linear clearance edge (1322) intersects an extension line of the second cutting edge (133), and the intersection point is located outside the cutting portion (12), an angle between an extension direction of the second cutting edge (133) and the width direction is α and satisfies the relationship: 10°≤α≤30°, and an angle between an extension direction of the first linear clearance edge (1322) and the width direction is β and satisfies the relationship: 10°≤β≤30°.

5. The cutting insert according to claim 2, wherein, The first relief surface (121) comprises a first circular-arc relief surface (1211) and a second circular-arc relief surface (1212), the second circular-arc relief surface (1212) is connected with the first circular-arc clearance surface (1221), the first circular-arc relief surface (1211) and the second circular-arc relief surface (1212) respectively intersect the first surface (1241) and form a first circular-arc cutting edge (1311) and a second circular-arc cutting edge (1312) at the intersection, and the first circular-arc cutting edge (1311) and the second circular-arc cutting edge (1312) are connected and constitute the first cutting edge (131). The insert body (11) is provided with a mounting hole (111) penetrating in the thickness direction, the intersection of the center line of the mounting hole (111) and the plane where the first surface (1241) is located is defined as a center point, the shortest distance between the first circular-arc cutting edge (1311) and the center point is greater than the maximum distance between the first transition edge (134) and the center point, and the minimum distance between the first transition edge (134) and the center point is greater than the maximum distance between the first circular-arc clearance edge (1321) and the center point.

6. The cutting insert according to claim 5, characterized in that, The first circular-arc cutting edge (1311) and the second circular-arc cutting edge (1312) are both convex in the thickness direction and away from the insert body (11), and the intersection point of the first circular-arc cutting edge (1311) and the second circular-arc cutting edge (1312) is the highest point of the cutting portion (12) in the thickness direction.

7. The cutting insert according to claim 5, wherein, The insert body (11) is provided with a flat surface (112) on both sides in the thickness direction, the first surface (1241) is provided with a chip flute (14) recessed towards the inside of the cutting portion (12), the chip flute (14) comprises a rake surface (141) and a counter surface (142) connected in sequence in the length direction, the rake surface (141) intersects the first relief surface (121), the first clearance surface (122), the second relief surface (123) and the first transition surface (125) respectively, and the counter surface (142) is connected with the flat surface (112). The rake surface (141) and the counter surface (142) are both inclined and extended towards the inside of the cutting portion (12).

8. The cutting insert according to claim 7, characterized in that, The rake face (141) comprises a first planar rake face (1411), a first arcuate rake face (1412), a second planar rake face (1413), a second arcuate rake face (1414) and a third planar rake face (1415) connected in sequence along the width direction, the first arcuate rake face (1412) is recessed towards the inside of the cutting portion (12), and the second arcuate rake face (1414) is convexly arranged towards the direction away from the cutting portion (12). The radius of the first arcuate rake face (1412) is R1, the radius of the second arcuate rake face (1414) is R2, and R1>R2 is satisfied.

9. The cutting insert according to claim 8, characterized in that, The side of the cutting portion (12) away from the blade body (11) has a third arcuate relief face (126), a second arcuate clearance face (127), a second planar clearance face (128), a second transition face (129) and a third relief face (1210) connected in sequence, the third arcuate relief face (126), the second arcuate clearance face (127), the second planar clearance face (128), the second transition face (129) and the third relief face (1210) are symmetrically arranged with the second arcuate relief face (1212), the first arcuate clearance face (1221), the first planar clearance face (1222), the first transition face (125) and the second relief face (123) relative to the first arcuate relief face (1211); The other side of the cutting portion (12) along the thickness direction is formed with a second surface (1242), the second surface (1242) is formed with the chip flute (14) recessed towards the inside of the cutting portion (12), the third arcuate relief face (126), the second arcuate clearance face (127), the second planar clearance face (128), the second transition face (129) and the third relief face (1210) respectively intersect with the second surface (1242) and the intersection is formed with a third arcuate cutting edge (135), a second arcuate clearance edge (136), a second straight line clearance edge (137), a second transition edge (138) and a third cutting edge (139).

10. A cutting tool characterized by Comprise: A tool body (21) having a plurality of mounting grooves (211) arranged at intervals along the circumference; A cutting blade (10) configured as the cutting blade (10) of any one of claims 1-9, a plurality of the cutting blades (10) are arranged and connected one by one with a plurality of the mounting grooves (211).

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