Indexable cutting insert and cutting tool assembly

Abstract

This utility model discloses an indexable cutting insert and a cutting tool assembly. The indexable cutting insert includes: an insert body with a rotating mounting portion; the insert body includes multiple angular cutting edges and multiple side cutting edges, which are staggered in the circumferential direction of the insert body; wherein, a concave portion is formed on one end face of the insert body with side cutting edges, extending inward along the thickness direction of the insert body, and the concave portion is formed between the side cutting edges and the rotating mounting portion; the insert body also has a guide groove extending inward along the thickness direction of the insert body, the end of which communicates with the concave portion. The indexable cutting insert of this utility model can promote chip breakage, create a clearance area to facilitate the conduction of cutting heat to the air, and guide cutting fluid to the concave portion to cool the chips, reduce the conduction of cutting heat to the insert body, and extend the service life of the insert body.

Description

Technical Field

[0001] This utility model relates to the field of cutting insert technology, and in particular to an indexable cutting insert and a cutting tool assembly. Background Technology

[0002] Metal cutting is generally classified into finishing, semi-finishing, medium cutting and roughing according to the depth of cut. In order to improve processing efficiency and reduce costs, the first cut of the workpiece is usually carried out with medium or roughing, using a combination of relatively large depth of cut and feed to improve the metal removal rate. However, while improving efficiency, it is often accompanied by large cutting force and high cutting heat, which can easily cause the cutting tool to break and lead to a sharp decrease in the cutting tool life. There is room for improvement. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes an indexable cutting insert, which can generate a clearance area to facilitate the conduction of cutting heat to the air, and can cool the chips, reduce the conduction of cutting heat to the insert body, and extend the service life of the insert body.

[0004] An indexable cutting insert according to an embodiment of the present invention includes: an insert body having a rotatable mounting portion; the insert body includes a plurality of corner cutting edges and a plurality of side cutting edges arranged around the rotatable mounting portion, wherein the plurality of corner cutting edges and the plurality of side cutting edges are sequentially staggered in the circumferential direction of the insert body; wherein, the insert body has a concave portion formed on one end face of the side cutting edge having the concave portion, the concave portion being formed between the side cutting edge and the rotatable mounting portion; the insert body also has a guide groove concave in the thickness direction of the insert body, the end of the guide groove communicating with the concave portion.

[0005] According to the present invention, the indexable cutting insert, by providing a rotating mounting part, allows the insert body to be detachably connected to the tool holder. This means that when one of the corner cutting edges or side cutting edges wears or overheats, the insert body can be removed, rotated, and reinstalled to continue the cutting process. Furthermore, the concave surface generates bending stress on the chips, promoting chip breakage. It also creates a clearance area between the chips and the concave surface, facilitating heat transfer to the air. Additionally, the presence of a guide groove communicating with the concave surface allows cutting fluid to flow to it, reliably cooling the chips, reducing heat transfer to the insert body, and effectively extending the lifespan of the insert body.

[0006] According to some embodiments of the present invention, the indexable cutting blade has a plurality of concave surfaces between each side cutting edge and the rotating mounting portion. The plurality of concave surfaces are spaced apart in the length direction of the side cutting edge, and each concave surface is connected to at least one guide groove.

[0007] According to some embodiments of the present invention, the indexable cutting insert includes at least one intermediate concave surface and two corner concave surfaces, at least one intermediate concave surface is located between the two corner concave surfaces, the guide groove includes a central guide groove and a common guide groove, each intermediate concave surface is provided with a corresponding common guide groove, and the two adjacent corner concave surfaces of each corner cutting edge are connected to a common guide groove.

[0008] According to some embodiments of the present invention, the indexable cutting insert has an angle α between the extending direction of the corner concave portion and the extending direction of the side cutting edge, satisfying: 70°≤α≤90°; and / or, the distance between the tangent point of the corner cutting edge and the corner concave portion is L, satisfying: 3.5mm≤L≤4.5mm; and / or, the distance between the side cutting edge and the corner concave portion is E, satisfying: 1mm≤E≤1.8mm; and / or, the depth of the corner concave portion is F, satisfying: 0.05mm≤F≤0.5mm.

[0009] According to some embodiments of the present invention, in the indexable cutting blade, at least a portion of the width of each of the guide grooves is configured to gradually decrease toward the corresponding concave portion.

[0010] According to some embodiments of the present invention, the indexable cutting blade has a vertical depth of concave portion that is greater than the vertical depth of the corresponding guide groove.

[0011] According to some embodiments of the present invention, the distance between two adjacent concave surfaces of the indexable cutting insert is M, and satisfies: 0.8mm≤M≤2mm.

[0012] According to some embodiments of the present invention, the indexable cutting insert has a ridge surface, a bevel surface, and a recessed bottom surface distributed sequentially between the side cutting edge and the rotating mounting part. The ridge surface is constructed as the cutting surface of the corner cutting edge and the side cutting edge. The concave surface is located on the recessed bottom surface and is recessed inward relative to the recessed bottom surface. The bevel surface is constructed to extend obliquely from the ridge surface to the recessed bottom surface.

[0013] According to some embodiments of the present invention, in the indexable cutting insert, a first protrusion and a second protrusion are formed between the corner cutting edge and the rotating mounting part. The first protrusion is higher than the recessed bottom surface, and the second protrusion is higher than the first protrusion. The first protrusion and the second protrusion separate the recessed bottom surfaces corresponding to two adjacent side cutting edges.

[0014] This utility model also proposes a cutting tool assembly.

[0015] The cutting tool assembly according to an embodiment of the present invention includes a tool holder and an indexable cutting insert as described in any of the above embodiments. The insert body is mounted on the tool holder, and the tool holder is provided with a liquid spraying section that sprays liquid toward the guide groove.

[0016] The cutting tool assembly and the indexable cutting insert described above have the same advantages over the prior art, which will not be repeated here.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the structure of an indexable cutting insert according to an embodiment of the present utility model; Figure 2 This is a partial structural schematic diagram of an indexable cutting insert according to an embodiment of the present utility model; Figure 3 yes Figure 2 A schematic diagram of the cross-section at point AA.

[0019] Figure label: Indexable cutting insert 100, The blade body 1, rotating mounting part 11, corner cutting edge 12, side cutting edge 13, concave part 14, middle concave part 141, corner concave part 142, guide groove 15, middle guide groove 151, common guide groove 152, upper end face 16, edge face 161, inclined face 162, sunken bottom face 163, first protrusion 17, second protrusion 18, lower end face 19. Detailed Implementation

[0020] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0021] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] The following is for reference. Figures 1-3 The indexable cutting insert 100 according to an embodiment of the present invention can generate an air-retaining area, which facilitates the conduction of cutting heat to the air, and can cool the chips, reduce the conduction of cutting heat to the insert body 1, and extend the service life of the insert body 1.

[0023] like Figures 1-2 As shown, an indexable cutting insert 100 according to an embodiment of the present invention includes: an insert body 1.

[0024] The blade body 1 has a rotating mounting portion 11. The blade body 1 includes a plurality of corner cutting edges 12 and a plurality of side cutting edges 13 distributed around the rotating mounting portion 11. The plurality of corner cutting edges 12 and the plurality of side cutting edges 13 are arranged alternately in the circumferential direction of the blade body 1. The blade body 1 has a concave portion 14 formed on the end face of the side cutting edge 13, which is recessed inward along the thickness direction of the blade body 1. The concave portion 14 is formed between the side cutting edge 13 and the rotating mounting portion 11. The blade body 1 also has a guide groove 15 recessed inward along the thickness direction of the blade body 1. The end of the guide groove 15 is connected to the concave portion 14.

[0025] Specifically, the indexable cutting insert 100 is a polygonal cutting element that can be mechanically clamped onto a tool holder. Its core feature is that a single insert has multiple effective cutting edges. When a certain cutting edge is worn or overheated, it can be used again by indexing or replacing the insert without regrinding. Common indexable cutting inserts 100 include triangular, quadrilateral, and pentagonal shapes, with each side being a cutting edge, which can significantly improve material utilization.

[0026] The indexable cutting insert 100 includes an insert body 1, which is the main structure of the indexable cutting insert 100 and can be used to set the cutting edge to realize the cutting function of the indexable cutting insert 100. The insert body 1 has a rotating mounting part 11, which is used to install the insert body 1 on the tool holder to ensure the reliable operation of the insert body 1. The rotating mounting part 11 can be constructed as a mounting hole that penetrates the insert body 1 along the thickness direction. A connecting piece can be inserted into the mounting hole and the tool holder at the same time to realize the installation and fixation of the insert body 1 on the tool holder. The insert body 1 and the tool holder are detachably connected through the rotating mounting part 11, which makes it easy to connect or separate the insert body 1 from the tool holder, and also makes it easy to install or remove the insert body 1. When one of the cutting edges wears or overheats, the insert body 1 can be removed and rotated to a new position to continue the cutting process.

[0027] Meanwhile, the blade body 1 includes a corner cutting edge 12 and a side cutting edge 13 distributed around the rotating mounting part 11. The rotating mounting part 11 is located in the middle of the blade body 1, providing sufficient space for the arrangement of the corner cutting edge 12 and the side cutting edge 13. The corner cutting edge 12 is located at the top corner of the blade body 1 and is usually an arc or a sharp corner, serving as a secondary cutting edge. The side cutting edge 13 is located on the side of the blade body 1 and is usually a straight line or a diagonal line, serving as a primary cutting edge. By arranging both the corner cutting edge 12 and the side cutting edge 13 around the rotating mounting part 11, both the corner cutting edge 12 and the side cutting edge 13 are positioned towards the outside of the blade body 1, which is also towards the workpiece, to facilitate cutting the workpiece.

[0028] Furthermore, there are multiple corner cutting edges 12 and side cutting edges 13, meaning that the number of corner cutting edges 12 and side cutting edges 13 can be two, three, or more. Therefore, when one of the corner cutting edges 12 or side cutting edges 13 is worn or overheated, the insert body 1 can be removed, rotated, and reinstalled. The other corner cutting edges 12 or side cutting edges 13 can then be positioned towards the workpiece to continue the cutting process. Moreover, by distributing multiple corner cutting edges 12 and multiple side cutting edges 13 alternately in the circumferential direction of the insert body 1, the multiple corner cutting edges 12 and multiple side cutting edges 13 can be distributed alternately, which can make the cutting heat distribution more uniform, avoid local overheating that could lead to coating peeling or substrate softening, and help extend the service life of the insert body 1.

[0029] For example, such as Figures 1-2 As shown, the blade body 1 is quadrilateral, with four corner cutting edges 12 and four side cutting edges 13. The four corner cutting edges 12 and four side cutting edges 13 are staggered in the circumference of the blade body 1, which can effectively improve the material utilization rate. When one of the corner cutting edges 12 or side cutting edges 13 is worn or overheated, the other corner cutting edges 12 or side cutting edges 13 can be used to continue cutting the workpiece.

[0030] The insert body 1 has a concave portion 14 formed on the end face of the side with the side cutting edge 13. The concave portion 14 is disposed on the same side as the side cutting edge 13 and the corner cutting edge 12. The concave portion 14 is constructed to be recessed inward along the thickness direction of the insert body 1, so that the concave portion 1 has a certain depth relative to the end face of the side with the side cutting edge 13. The concave portion 14 is formed between the side cutting edge 13 and the rotating mounting part 11, so that the concave portion 14 is disposed on the side of the side cutting edge 13 away from the workpiece. Thus, when the chip flows from the side cutting edge 13 toward the rotating mounting part 11, it can flow to the concave portion 14. At this time, the edge of the concave portion 14 can generate a certain compressive force on the chip, so that the chip can generate a certain bending stress, which is conducive to chip breakage. A certain clearance area is generated between the concave portion 14 and the chip, which is conducive to the conduction of cutting heat into the air, thereby reducing the contact area between the chip and the insert body 1, and thus reducing the conduction of heat toward the insert body 1, which is conducive to extending the service life of the insert body 1.

[0031] Furthermore, the blade body 1 is also provided with a guide groove 15, which is connected to the concave surface 14. The guide groove 15 and the concave surface 14 are arranged on the same side. The guide groove 15 is constructed to be recessed inward along the thickness direction of the blade body 1, so that the guide groove 15 has a certain depth relative to the side end face where the side cutting edge 13 is provided, so as to provide a space for the cutting fluid. In addition, the guide groove 15 also has a certain length, which can guide the flow of the cutting fluid. The end of the guide groove 15 is connected to the concave surface 14, so that the cutting fluid can flow along the guide groove 15 to the concave surface 14, so as to reliably cool the chips, further reduce the conduction of cutting heat to the blade body 1, and help extend the service life of the blade body 1.

[0032] It should be noted that the blade body 1 has an upper end face 16 and a lower end face 19 distributed along the thickness direction. The upper end face 16 is the end face facing upward after the blade body 1 is installed on the tool holder, and the lower end face 19 is the end face facing downward after the blade body 1 is installed on the tool holder. In practice, a corner cutting edge 12 and a side cutting edge 13 can be provided on either the upper end face 16 or the lower end face 19, or both the corner cutting edge 12 and the side cutting edge 13 can be provided on both the upper end face 16 and the lower end face 19. The setting method is flexible and can be selected.

[0033] When the side cutting edge 13 is set on the upper end face 16, the concave part 14 and the guide groove 15 can both be set on the upper end face 16. When the side cutting edge 14 is set on the lower end face 19, the concave part 14 and the guide groove 15 can both be set on the lower end face 19. When the side cutting edge 13 is set on both the upper end face 16 and the lower end face 19, the concave part 14 and the guide groove 15 can both be set on both the upper end face 16 and the lower end face 19.

[0034] According to the present invention, the indexable cutting insert 100, by providing a rotating mounting part 11, allows the insert body 1 to be detachably connected to the tool holder. This means that when one of the corner cutting edges 12 or the side cutting edges 13 wears or overheats, the insert body 1 can be removed, rotated, and reinstalled to continue the cutting process. Furthermore, the concave surface 14 generates bending stress on the chips, promoting chip breakage. It also creates a clearance area between the chips and the concave surface 14, facilitating the conduction of cutting heat to the air. Additionally, by providing a guide groove 15 communicating with the concave surface 14, cutting fluid can be guided to the concave surface 14, reliably cooling the chips and reducing the conduction of cutting heat to the insert body 1, effectively extending the service life of the insert body 1.

[0035] For ease of description, the following description will take the example of setting the corner cutting edge 12 and the side cutting edge 13 on the upper end face 16.

[0036] In some embodiments, a plurality of concave surfaces 14 are provided between each side cutting edge 13 and the rotating mounting portion 11. The plurality of concave surfaces 14 are spaced apart in the length direction of the side cutting edge 13, and each concave surface 14 is connected to at least one guide groove 15.

[0037] In other words, the number of concave surfaces 14 between each side cutting edge 13 and the rotating mounting part 11 can be two, three or more, so that multiple concave surfaces 14 can be used to contain cutting fluid to cool the chips together, thereby improving the reliability and efficiency of cooling the chips. Furthermore, by distributing multiple concave surfaces 14 at intervals along the length of the side cutting edge 13, multiple concave surfaces 14 can be distributed sequentially along the length of the side cutting edge 13, and each of the multiple concave surfaces 14 can have a certain distance between them. This allows the cutting fluid to cool the chips simultaneously from multiple positions within the multiple concave surfaces 14, further improving the reliability and efficiency of cooling the chips.

[0038] Furthermore, the concave portion 14 allows the chips to generate a certain bending stress when flowing through it, thus promoting chip breakage. By spacing multiple concave portions 14 along the length of the side cutting edge 13, the chips generated when the cutting depth reaches a medium or higher level can flow through multiple concave portions 14 simultaneously, thereby generating bending stress at multiple locations and making the chips easier to break.

[0039] Furthermore, each concave portion 14 is connected to at least one guide channel 15, meaning that each concave portion 14 can be connected to one, two, or more guide channels 15, thereby allowing the cutting fluid to flow through at least one guide channel 15 to the corresponding concave portion 14, ensuring the reliability of supplying cutting fluid to the concave portion 14, and thus ensuring the reliability of the cutting fluid cooling the chips within the concave portion 14.

[0040] In some embodiments, the concave portion 14 includes at least one intermediate concave portion 141 and two corner concave portions 142, with at least one intermediate concave portion 141 located between the two corner concave portions 142. The guide channel 15 includes a central guide channel 151 and a common guide channel 152. Each intermediate concave portion 141 is correspondingly provided with a central guide channel 151, and two adjacent corner concave portions 142 of each corner cutting edge 12 are connected to a common guide channel 152.

[0041] Specifically, the concave surface 14 includes at least one intermediate concave surface 141 and two corner concave surfaces 142, that is, at least three concave surfaces 14 are provided between each side cutting edge 13 and the rotating mounting part 11, so that the cutting fluid can reliably cool the chips from at least three positions simultaneously within at least three concave surfaces 14, and at least one intermediate concave surface 141 is provided between two corner concave surfaces 142 so that the cutting fluid can cool the chips within the corner concave surfaces 142, which can help extend the service life of the insert body 1.

[0042] Meanwhile, the guide channel 15 includes a central guide channel 151 and a common guide channel 152. Both the central guide channel 151 and the common guide channel 152 can be used to guide the cutting fluid to the concave part 14. Each central concave part 141 is provided with a corresponding central guide channel 151. That is, for each central concave part 141, a central guide channel 151 is provided to introduce cutting fluid into it, so as to ensure the reliability of the cutting fluid cooling the chips in the central concave part 141. Moreover, the two adjacent corner concave parts 142 of each corner cutting edge 12 are connected to a common guide channel 152. That is, the cutting fluid can be introduced into the two adjacent corner concave parts 142 of the corner cutting edge 12 through a common guide channel 152, so as to ensure the reliability of the cutting fluid cooling the chips in the corner concave parts 142. This can reduce the number of guide channels 15, reduce the processing difficulty and the setting cost.

[0043] It should be noted that, as Figures 1-2 As shown, the number of intermediate concave surfaces 141 between each side cutting edge 13 and the rotating mounting part 11 is one, that is, three concave surfaces 14 are provided between each side cutting edge 13 and the rotating mounting part 11. The three concave surfaces 14 are distributed at intervals along the length direction of the corresponding side cutting edge 13, so that the cutting fluid can reliably cool the chips from three positions simultaneously in the three concave surfaces 14, effectively reducing the heat conduction to the blade body 1 and extending the service life of the blade body 1.

[0044] Furthermore, when the cutting depth changes, the curling and breaking radius required for a larger cutting depth is larger than that required for a smaller cutting depth. Therefore, in the direction perpendicular to the upper end face 16, the bottom height of the middle concave surface 141 is lower than the bottom height of the corner concave surface 142. Moreover, when there is more than one middle concave surface 141, in the direction from the corner cutting edge 12 toward the side cutting edge 13, the bottom height of the subsequent concave surface 14 is lower than the bottom height of the previous adjacent concave surface 14.

[0045] In some embodiments, the angle between the extending direction of the corner concave portion 142 and the extending direction of the side cutting edge 13 is α, and satisfies: 70°≤α≤90°; and / or, the distance between the tangent point of the corner cutting edge 12 and the corner concave portion 142 is L, and satisfies: 3.5mm≤L≤4.5mm; and / or, the distance between the side cutting edge 13 and the corner concave portion 142 is E, and satisfies: 1mm≤E≤1.8mm; and / or, the depth of the corner concave portion 142 is F, and satisfies: 0.05mm≤F≤0.5mm.

[0046] In other words, the concave corner portion 142 can be tilted relative to the side cutting edge 13, and the angle between the extension direction of the concave corner portion 142 and the extension direction of the side cutting edge 13 is α. That is, the angle between the center line of symmetry of the concave corner portion 142 and the side cutting edge 13 is α, and α is between 70° and 90°, such as 75°, 80° or 85°, etc., to avoid α being too large or too small. When α is too large, the chips may flow toward the machined surface, which may easily cause damage to the machined surface and reduce the quality of the machined surface. When α is too small, the extension direction of the concave corner portion 142 can be closer to the side cutting edge 13, that is, the extension length along the extension direction of the side cutting edge 13 is larger, which may lead to a reduction in the strength of the side cutting edge 13.

[0047] It should be noted that when the depth of cut is large, the feed is also large. In order to allow the chips to curl smoothly and to reduce cutting heat, the center line of symmetry of the concave part 141 is perpendicular to the side cutting edge 13.

[0048] Furthermore, the concave portion 14 has a certain depth, allowing the chip to generate bending stress at this location and also serving to contain cutting fluid. The corner concave portion 142 is positioned close to the corner cutting edge 12, with the distance between the tangent point of the corner cutting edge 12 and the corner concave portion 142 being L, and L being between 3.5mm and 4.5mm, such as 3.8mm, 4mm, or 4.2mm, to avoid L being too large or too small. When L is too large, that is, the distance between the corner concave portion 142 and the tangent point of the corner cutting edge 12 is too far, which is not conducive to chip breakage when the depth of cut is medium or above. When L is too small, that is, the distance between the corner concave portion 142 and the tangent point of the corner cutting edge 12 is too close, which is not conducive to chip breakage when the depth of cut is small.

[0049] Furthermore, the concave corner portion 142 is located between the side cutting edge 13 and the rotating mounting portion 11, such as... Figure 3As shown, the distance between the side cutting edge 13 and the corner concave surface 142 is set to E, and E is between 1mm and 1.8mm. For example, E can be 1.2mm, 1.4mm or 1.6mm, etc. This avoids E being too large or too small. When E is too large, the distance between the corner concave surface 142 and the side cutting edge 13 is too far, which makes it impossible for the chip to generate bending stress at the corner concave surface 142, which is not conducive to chip breakage. When E is too small, the distance between the corner concave surface 142 and the side cutting edge 13 is too small, which may result in insufficient strength of the side cutting edge 13, that is, insufficient strength of the insert body 1, and there is a risk of the insert chipping.

[0050] Furthermore, the depth of the concave portion 142 at the corner is F, and F is between 0.05 mm and 0.5 mm. For example, F can be 0.2 mm, 0.3 mm, or 0.4 mm, etc. This avoids F being too large or too small. When F is too large, that is, the depth of the concave portion 142 at the corner is large, it may affect the strength of the insert body 1 and is not conducive to creating a clearance area to release cutting heat. When F is too small, that is, the depth of the concave portion 142 at the corner is small, it is not conducive to accommodating enough cutting fluid, which may lead to a decrease in the reliability of cooling the chips.

[0051] It should be noted that the distance between the central concave surface 141 and the side cutting edge 13 should not be too large or too small, and the depth of the central concave surface 141 should not be too large or too small.

[0052] In some embodiments, at least a portion of the width of each guide groove 15 is configured to gradually decrease toward the corresponding concave portion 14.

[0053] Specifically, the guide channel 15 is connected to the concave surface 14 and is used to introduce cutting fluid into the concave surface 14, so that the cutting fluid can cool the chips inside. The width of at least a portion of each guide channel 15 is configured to gradually decrease towards the corresponding concave surface 14. That is, the width of a part or the whole of each guide channel 15 is configured to gradually decrease towards the corresponding concave surface 14, and the width of at least a portion of the guide channel 15 is configured to gradually decrease along the flow direction of the cutting fluid. This allows the cutting fluid to flow from the guide channel 15 to the concave surface 14 from the wider part to the narrower part, which can accelerate and pressurize the cutting fluid. This further improves the reliability and efficiency of the cutting fluid cooling the chips in the concave surface 14, and also promotes chip curling and breaking, improves chip breaking effect, helps to extend the service life of the insert body 1, and reduces costs.

[0054] It should be noted that, as Figures 1-2As shown, the width of the central guide channel 151 gradually decreases towards the central concave portion 141, and the width of the common guide channel 152 gradually decreases from the center of the common guide channel 152 towards the two corner concave portions 142 connected to it. This allows the cutting fluid to be accelerated and pressurized when flowing from the central guide channel 151 to the central concave portion 141, and when flowing from the common guide channel 152 to the corner concave portions 142.

[0055] In some embodiments, the vertical depth of the concave portion 14 is configured to be greater than the vertical depth of the corresponding guide groove 15.

[0056] Specifically, the concave portion 14 is connected to the guide channel 15. The vertical depth of the concave portion 14 is constructed to be greater than the vertical depth of the corresponding guide channel 15, so that there is a certain height difference between the concave portion 14 and the guide channel 15. This means that the bottom height of the concave portion 14 is lower than the bottom height of the guide channel 15. As a result, when the cutting fluid flows from the guide channel 15 into the concave portion 14, it can flow from the higher height to the lower height. This facilitates the flow of the cutting fluid from the guide channel 15 to the concave portion 14, ensuring the accuracy of the cutting fluid flow direction. Furthermore, it can accelerate and pressurize the flow of the cutting fluid, improving the cooling effect on the chips.

[0057] In some embodiments, the distance between two adjacent concave surfaces 14 is M, and satisfies: 0.8mm≤M≤2mm.

[0058] Specifically, three concave surfaces 14 are formed between each side cutting edge 13 and the rotating mounting part 11. The three concave surfaces 14 are spaced apart along the length direction of the side cutting edge 13, and the distance between two adjacent concave surfaces 14 is M, which is between 0.8mm and 2mm. For example, M can be 1mm, 1.3mm or 1.6mm, etc. This avoids M being too large or too small. When M is too large, the distance between two adjacent concave surfaces 14 is too far, and the effect of cooling the chips will be reduced. When M is too small, the distance between two adjacent concave surfaces 14 is too close, which may cause the local strength of the side cutting edge 13 to be low. As a result, when the depth of cut is medium or above, it is easy to cause chipping.

[0059] In some embodiments, the blade body 1 has a ridge surface 161, a bevel surface 162 and a recessed bottom surface 163 sequentially distributed between the side cutting edge 13 and the rotating mounting portion 11. The ridge surface 161 is configured as the cutting surface of the corner cutting edge 12 and the side cutting edge 13. The concave portion 14 is located on the recessed bottom surface 163 and is recessed inward relative to the recessed bottom surface 163. The bevel surface 162 is configured to extend obliquely from the ridge surface 161 to the recessed bottom surface 163.

[0060] In other words, between the side cutting edge 13 and the rotating mounting part 11, a ridge surface 161, a bevel surface 162, and a recessed bottom surface 163 are formed sequentially. The ridge surface 161 is constructed as the cutting surface of the corner cutting edge 12 and the side cutting edge 13, that is, the ridge surface 161 can be parallel to the horizontal direction. The concave part 14 is located on the recessed bottom surface 163 and is recessed inward relative to the recessed bottom surface 163. Thus, the recessed bottom surface 163 is constructed to be recessed downward relative to the upper end surface 16, so that the recessed bottom surface 163 can have a certain depth, and the height of the recessed bottom surface 163 is lower than that of the ridge surface 16. 1. The inclined surface 162 is configured to extend obliquely from the edge face 161 to the recessed bottom surface 163, so that the inclined surface 162 can connect the edge face 161 and the recessed bottom surface 163. In other words, the inclined surface 162 is configured to extend obliquely downward from the edge face 161 to the recessed bottom surface 163 to form a transition between the edge face 161 and the recessed bottom surface 163. This creates a chip-receiving space at the inclined surface 162 and the recessed bottom surface 163, allowing chips to flow from the side cutting edge 13 along the edge face 161, the inclined surface 162 and the recessed bottom surface 163 toward the rotating mounting part 11.

[0061] When the fluid flows to the concave part 14, it can generate a certain bending stress, which is conducive to the breaking of the chip and can form a certain air gap, which is conducive to the dissipation of cutting heat. Moreover, the cutting fluid in the concave part 14 can cool the chip and reduce the heat conduction to the insert body 1, which is conducive to extending the service life of the insert body 1.

[0062] Furthermore, the side cutting edge 13 is provided with three spaced concave surfaces 14. The concave surfaces 14 are located on the sunken bottom surface 163. When the cutting depth is medium or above, a larger chip space can be formed, making the chips easier to break. When the chips flow through the concave surfaces 14, there is also a large air-retaining area that can promote heat conduction into the air, which helps to extend the service life of the blade body 1.

[0063] In some embodiments, a first protrusion 17 and a second protrusion 18 are formed between the corner cutting edge 12 and the rotating mounting portion 11. The first protrusion 17 is higher than the sunken bottom surface 163, and the second protrusion 18 is higher than the first protrusion 17. The first protrusion 17 and the second protrusion 18 separate the sunken bottom surfaces 163 corresponding to two adjacent side cutting edges 13.

[0064] Specifically, the first protrusion 17 and the second protrusion 18 are used to curl and break the chips. By forming the first protrusion 17 and the second protrusion 18 between the corner cutting edge 12 and the rotating mounting portion 11, both the first protrusion 17 and the second protrusion 18 are formed on the side of the corner cutting edge 12 away from the workpiece. Furthermore, the first protrusion 17 and the second protrusion 18 separate the recessed bottom surfaces 163 corresponding to two adjacent side cutting edges 13. Thus, the first protrusion 17 and the second protrusion 18 are positioned between two adjacent recessed bottom surfaces 163. Moreover, as... Figures 1-2 As shown, the first protrusion 17 is positioned toward the corner cutting edge 12, and the second protrusion 18 is positioned toward the rotating mounting part 11.

[0065] When the cutting depth is large, the chip needs a smaller curl radius. The first protrusion 17 can be constructed to be higher than the sunken bottom surface 163, so that the first protrusion 17 can have a certain height. The height of the second protrusion 18 is set to be higher than the first protrusion 17, so that the curl radius of the chip at the second protrusion 18 is smaller than the curl radius at the first protrusion 17. Thus, when the cutting depth is small, the chip can flow from the side cutting edge 13 along the edge surface 161 and the inclined surface 162 to the first protrusion 17, and the first protrusion 17 can curl and break the chip. When the cutting depth is medium or higher, the chip can flow from the side cutting edge 13 along the edge surface 161 and the inclined surface 162 to the second protrusion 18, and the second protrusion 18 can curl and break the chip.

[0066] And, such as Figures 1-2 As shown, at least a portion of the second protrusion 18 is configured to extend in a direction parallel to the extension direction of the side cutting edge 13, and the second protrusions 18 corresponding to two adjacent corner cutting edges 12 are connected, which can increase the extension length of the second protrusion 18 and improve the reliability of curling and breaking the chips. A portion of the concave portion 14 is located on the sunken bottom surface 163, and a portion is located on the second protrusion 18.

[0067] This utility model also proposes a cutting tool assembly.

[0068] The cutting tool assembly according to an embodiment of the present invention includes a tool holder and an indexable cutting insert 100 according to any of the above embodiments. The insert body 1 is mounted on the tool holder, which is provided with a liquid spraying part that sprays liquid towards the guide groove 15. The tool holder provides a mounting position for the insert body 1 to fix the insert body 1 and ensure reliable cutting. The liquid spraying part on the tool holder sprays cutting fluid into the guide groove 15 so that the cutting fluid can flow along the guide groove 15 to the concave part 14, reliably cooling the chips to reduce cutting heat, promote chip breakage, and extend the service life of the insert body 1.

[0069] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0070] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An indexable cutting insert, characterized in that, include: The blade body has a rotating mounting portion, and the blade body includes a plurality of corner cutting edges and a plurality of side cutting edges arranged around the rotating mounting portion, and the plurality of corner cutting edges and the plurality of side cutting edges are arranged alternately in the circumferential direction of the blade body. The blade body has a concave portion formed on one end face of the side where the side cutting edge is located, which is recessed inward along the thickness direction of the blade body. The concave portion is formed between the side cutting edge and the rotating mounting part. The blade body also has a guide groove recessed inward along the thickness direction of the blade body, and the end of the guide groove is connected to the concave portion.

2. The indexable cutting insert according to claim 1, characterized in that, A plurality of concave surfaces are provided between each of the side cutting edges and the rotating mounting portion. The plurality of concave surfaces are spaced apart along the length direction of the side cutting edges, and each concave surface is connected to at least one of the guide grooves.

3. The indexable cutting insert according to claim 2, characterized in that, The concave surface includes at least one intermediate concave surface and two corner concave surfaces. At least one intermediate concave surface is located between the two corner concave surfaces. The guide channel includes a central guide channel and a common guide channel. Each intermediate concave surface is provided with a corresponding common guide channel, and the two adjacent corner concave surfaces of each corner cutting edge are connected to a common guide channel.

4. The indexable cutting insert according to claim 3, characterized in that, The angle between the extending direction of the concave corner and the extending direction of the side cutting edge is α, and satisfies: 70°≤α≤90°; And / or, the distance between the tangent point of the corner cutting edge and the concave part of the corner is L, and satisfies: 3.5mm≤L≤4.5mm; And / or, the distance between the side cutting edge and the corner concave surface is E, and satisfies: 1mm≤E≤1.8mm; And / or, the depth of the concave corner is F, and satisfies: 0.05mm≤F≤0.5mm.

5. The indexable cutting insert according to claim 2, characterized in that, At least a portion of the width of each of the flow channels is configured to gradually decrease toward the corresponding concave surface.

6. The indexable cutting insert according to claim 2, characterized in that, The vertical depth of the concave portion is greater than the vertical depth of the corresponding guide groove.

7. The indexable cutting insert according to claim 2, characterized in that, The distance between two adjacent concave surfaces is M, and satisfies: 0.8mm≤M≤2mm.

8. The indexable cutting insert according to claim 1, characterized in that, The blade body has a ridge surface, a bevel surface, and a recessed bottom surface distributed sequentially between the side cutting edge and the rotating mounting part. The ridge surface is constructed as the cutting surface of the corner cutting edge and the side cutting edge. The concave surface is located on the recessed bottom surface and is recessed inward relative to the recessed bottom surface. The bevel surface is constructed to extend obliquely from the ridge surface to the recessed bottom surface.

9. The indexable cutting insert according to claim 8, characterized in that, A first protrusion and a second protrusion are formed between the corner cutting edge and the rotating mounting part. The first protrusion is higher than the sunken bottom surface, and the second protrusion is higher than the first protrusion. The first protrusion and the second protrusion separate the sunken bottom surfaces corresponding to two adjacent side cutting edges.

10. A cutting tool assembly, characterized in that, The tool holder includes an indexable cutting insert as described in any one of claims 1-9, wherein the insert body is mounted on the tool holder, the tool holder is provided with a spray section, and the spray section sprays liquid toward the guide channel.

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