Cutting tool

Abstract

The present application relates to the technical field of cutters, and discloses a cutting tool, which comprises a blade body, the blade body being provided with a blade runner adjacent to a cutting edge; a tool holder, the tool holder comprising a tool holder body and a mounting portion, the tool holder body being provided with a tool holder runner, and the mounting portion being provided with a mounting portion runner, the mounting portion runner comprising a first runner and a second runner, the first runner being arranged at one end of the second runner away from the tool holder runner, the extension direction of the first runner intersecting the extension direction of the second runner, and the extension direction of the first runner intersecting the extension direction of the blade runner. According to the cutting tool of the present application, the cooling runner is arranged inside the cutting tool, the turning is arranged in the mounting portion runner, and the turning is arranged at the connection between the mounting portion runner and the blade runner, so that the pressure of the cooling medium in the runner can be controlled, the impact of the cooling medium on the blade body is reduced, and the cooling medium can timely take away the cutting chips and cool and lubricate the cutting tool.

Description

Technical Field

[0001] This invention relates to the field of cutting tool technology, and more specifically, to a cutting tool. Background Technology

[0002] During metal cutting, the high-speed friction between the cutting edge and the workpiece generates a large amount of cutting heat and chips. Excessive cutting temperature will accelerate tool wear, reduce workpiece machining accuracy and surface quality. At the same time, if the chips generated by cutting cannot be discharged in time, they are prone to entanglement of the tool, accumulation in the cutting area, scratching the workpiece surface, blocking the machining groove, affecting the continuity of processing and product qualification rate. There is room for research on how to cool and remove chips. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. Therefore, one object of the present invention is to provide a cutting tool that can achieve cooling and chip removal in the cutting area.

[0004] A cutting tool according to an embodiment of the present invention includes: a blade body having a cutting edge and a blade flow channel adjacent to the cutting edge; a tool shank including a tool shank body and a mounting portion, the tool shank body having a tool shank flow channel, one end of the tool shank flow channel communicating with the outside, the mounting portion having a mounting portion flow channel communicating with the tool shank flow channel, the mounting portion flow channel including a first flow channel and a second flow channel, the first flow channel being disposed at the end of the second flow channel away from the tool shank flow channel, wherein the blade body is adapted to be mounted to the mounting portion, the blade flow channel communicating with the first flow channel of the mounting portion flow channel, the extension direction of the first flow channel intersecting the extension direction of the second flow channel, and the extension direction of the first flow channel intersecting the extension direction of the blade flow channel.

[0005] According to embodiments of the present invention, by designing a first flow channel and a second flow channel with different extension directions inside the cutting tool, and forming a certain bend between the mounting flow channel and the insert flow channel, the pressure of the cooling medium in the flow channel can be controlled, the impact of the cooling medium on the insert body can be reduced, and the impact force on the insert body opposite to the cutting force can be weakened, thereby improving the stability of the cutting process. Furthermore, the cooling medium can be stably and continuously sprayed onto the cutting area, so that the cooling medium can promptly carry away the chips and cool and lubricate the cutting tool, thereby improving the machining quality of the workpiece.

[0006] In some embodiments, the diameter of the tool holder flow channel is larger than the diameter of the mounting portion flow channel, and a transition flow channel is provided between the tool holder flow channel and the mounting portion flow channel, wherein the cross-sectional dimension of the transition flow channel gradually decreases along the direction close to the mounting portion flow channel.

[0007] In some embodiments, the mounting portion includes a clamping portion and a locking portion. The locking portion is connected to one end of the tool holder body in a first direction, and the clamping portion is connected to one end of the locking portion away from the tool holder body. The clamping portion is adapted to clamp the blade body, and the locking portion has a fastener for clamping the clamping portion. In a second direction, the clamping portion is eccentrically disposed relative to the center of the tool holder body. At least a portion of the mounting portion flow channel is disposed in the clamping portion. The tool holder flow channel extends along the first direction and its centerline is parallel to the centerline of the second flow channel of the mounting portion flow channel. The transition flow channel is located on one side of the fastener and extends along a direction inclined to the first direction. Both ends of the transition flow channel communicate with the tool holder flow channel and the mounting portion flow channel, respectively. The first direction is perpendicular to the second direction.

[0008] In some embodiments, the cutting tool further includes: a seal that sealably connects the mounting portion and the blade body; wherein the mounting portion has a first positioning groove located at one end of the first flow channel away from the second flow channel, and the first positioning groove is located on the outer periphery of the first flow channel and communicates with the first flow channel, and the seal is adapted to be installed into the first positioning groove; and / or, the blade body has a second positioning groove located at one end of the blade flow channel near the flow channel of the mounting portion, and the second positioning groove is located on the outer periphery of the blade flow channel and communicates with the flow channel of the mounting portion, and the seal is adapted to be installed into the second positioning groove.

[0009] In some embodiments, the blade body has a first contact surface near the flow channel of the mounting portion, and the angle between the axis of the blade flow channel and the center line of the first contact surface is α, satisfying: 15°≤α≤45°.

[0010] In some embodiments, the extension direction of the first flow channel is perpendicular to the center line of the first mating surface.

[0011] In some embodiments, the cross-sectional area of ​​the blade flow channel gradually decreases along the direction close to the cutting edge.

[0012] In some embodiments, the blade flow channel is located on one side of the cutting edge in a first direction and has an outlet near the cutting edge and an inlet away from the cutting edge. The cutting edge extends along a second direction. The distance between the outlet and the cutting edge in the first direction is D1, the distance between the inlet and the cutting edge in the first direction is D2, and the length of the blade body in the first direction is D3, satisfying: 2D1≤D2 and D2<D3, and the first direction is perpendicular to the second direction.

[0013] In some embodiments, the length of the cutting edge in the second direction is L, and the distance between the axis of the blade flow channel and the edge of the blade body in the second direction is L1, satisfying: 0.15L≤L1≤0.5L.

[0014] In some embodiments, the blade flow channel may include a main flow channel and multiple branch flow channels. One end of the main flow channel is connected to the mounting section flow channel, and the multiple branch flow channels are located at the other end of the main flow channel. One end of each branch flow channel is connected to the main flow channel, and the other end of each branch flow channel forms a liquid outlet adjacent to the cutting edge. The multiple liquid outlets are arranged at intervals along the extension direction of the cutting edge, wherein the cutting edge extends along a second direction. The distance between the center of the multiple liquid outlets and the edge of the blade body in the second direction is L2, and the distance between the axis of the main flow channel and the edge of the blade body in the second direction is L3, satisfying: L3 > L2; the center distance between the liquid outlets of the multiple branch flow channels is L4, satisfying: L4 ≥ 0.4 mm.

[0015] Additional aspects and advantages of the 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

[0016] The above and / or additional aspects and advantages of the present invention 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 a cutting tool according to some embodiments of the present invention; Figure 2 This is an exploded view of a cutting tool according to some embodiments of the present invention; Figure 3 This is a partial structural schematic diagram of a tool holder according to some embodiments of the present invention from one viewpoint. Figure 4 This is a partial structural schematic diagram of a tool holder according to some embodiments of the present invention from another perspective; Figure 5 This is a schematic diagram of the blade body from one perspective according to some embodiments of the present invention; Figure 6 This is a schematic diagram of the blade body according to some embodiments of the present invention from another perspective; Figure 7 This is a schematic diagram of the blade body according to other embodiments of the present invention.

[0017] Figure label: 100. Cutting tool; 10. Tool body; 11. Tool flow channel; 111. Outlet of tool flow channel; 112. Inlet of tool flow channel; 113. Main flow channel; 114. Branch flow channel; 12. Second positioning groove; 13. Cutting edge; 14. First mating surface; 15. Second mating surface; 20. Tool holder; 21. Tool holder body; 211. Tool holder flow channel; 212. External pipe interface; 22. Mounting part; 221. First positioning groove; 222. Flow channel of mounting part; 2221. First flow channel; 2222. Second flow channel; 223. Transition flow channel; 224. Locking part; 2241. Fastener; 2242. Threaded hole; 225. Clamping part; 2251. First clamping surface; 2252. Second clamping surface; 30. Seal. Detailed Implementation

[0018] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0019] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0020] The following is for reference. Figures 1-7 A cutting tool 100 according to an embodiment of the present invention is described.

[0021] like Figures 1-7As shown, a cutting tool 100 according to an embodiment of the present invention includes: a cutting tool body 10 and a tool shank 20. The tool shank 20 includes a tool shank body 21 and a mounting portion 22. The tool shank body 21 has a tool shank flow channel 211, the cross-sectional dimensions of which remain unchanged. The mounting portion 22 has a mounting portion flow channel 222, the cross-sectional dimensions of which remain unchanged. Cooling medium can flow within the tool shank flow channel 211 and the mounting portion flow channel 222. One end of the tool shank flow channel 211 communicates with the outside, and the mounting portion flow channel 222 communicates with the tool shank flow channel 211. Here, the mounting section flow channel 222 can be directly connected to the tool holder flow channel 211, or it can be connected through other flow channels. The mounting section flow channel 222 includes a first flow channel 2221 and a second flow channel 2222. The first flow channel 2221 is located at the end of the second flow channel 2222 away from the tool holder flow channel 211. The extension direction of the first flow channel 2221 intersects the extension direction of the second flow channel 2222. The first flow channel 2221 and the second flow channel 2222 can be smoothly connected by an arc segment to reduce the local impact of the cooling medium on the flow channel bend.

[0022] The blade body 10 is mounted on the mounting portion 22 of the tool holder 20. The blade body 10 has a blade flow channel 11. The inlet 112 of the blade flow channel is located on the surface of the blade body 10 that contacts the mounting portion 22. The outlet of the first flow channel 2221 is located on the surface of the mounting portion 22 that contacts the blade body 10. The outlet of the first flow channel 2221 is connected to the inlet 112 of the blade flow channel, thereby connecting the blade flow channel 11 with the first flow channel 2221 of the mounting portion flow channel 222 to allow the cooling medium in the tool holder 20 to be introduced into the blade body 10.

[0023] The insert body 10 has a cutting edge 13, which can cut the workpiece, thereby generating chips and a large amount of cutting heat. The insert flow channel 11 is adjacent to the cutting edge 13, such as... Figure 2 As shown, one side of the cutting edge 13 is the rake face, and the liquid outlet 111 of the insert flow channel is located on the rake face. The insert body 10 can be mounted on the mounting part 22 of the tool holder 20, thereby allowing the cooling medium to flow to the cutting edge 13, so that the cooling medium can carry away the chips in time and cool and lubricate the cutting tool 100.

[0024] In related technologies, to enable the cooling medium to better impact and cool the cutting edge 13 and reduce pressure loss, the first flow channel 2221 and the insert flow channel 11 are usually extended in the same direction. However, this often causes problems during workpiece machining. Through extensive experiments, the inventors discovered that while the cooling medium is introduced into the insert flow channel 11 through the first flow channel 2221, it also generates an impact force on the insert body 10. When the first flow channel 2221 and the insert flow channel 11 extend in the same direction, the impact force on the insert body 10 is opposite to the direction of the cutting force, thus affecting machining stability. Therefore, a new structure is proposed, which, on the one hand... The tool holder 20 is designed with a first flow channel 2221 and a second flow channel 2222 extending in different directions, so that the first flow channel 2221 and the second flow channel 2222 form a certain bend. At the same time, the extension direction of the first flow channel 2221 intersects the extension direction of the insert flow channel 11, so that the first flow channel 2221 and the insert flow channel 11 form a certain bend. This can effectively avoid the impact of the opposing flow. That is, through the appropriate flow channel bend design, the pressure in the flow channel is controlled within a suitable range. Thus, while achieving cooling and chip removal of the cutting area, the impact of the cooling medium on the insert body 10 is reduced, which leads to poor machining effect.

[0025] In addition, when the cooling medium is started, the sudden change in flow rate will cause pressure fluctuations in the cooling medium. When the cooling medium passes through the flow channel with bends, the pressure wave will be refracted or scattered, resulting in local resistance loss. The impact kinetic energy of the pressure fluctuation is converted into heat energy consumption, which can weaken the pressure fluctuation and reduce the impact of the sudden introduction of cooling medium on the blade body 10, thereby improving the stability of the blade body 10 installation.

[0026] According to the present invention, the cutting tool 100 has a first flow channel 2221 and a second flow channel 2222 with different extension directions designed inside the cutting tool 100, and a certain bend is formed between the mounting flow channel 222 and the insert flow channel 11. This can control the pressure of the cooling medium in the flow channel, reduce the impact of the cooling medium on the insert body 10, weaken the impact force on the insert body 10 that is opposite to the cutting force, thereby improving the stability of the cutting process. It can also stably and continuously spray the cooling medium to the cutting area, so that the cooling medium can carry away the chips in time, and cool and lubricate the cutting tool 100, thereby improving the machining quality of the workpiece.

[0027] like Figure 2As shown, in some embodiments, the cutting tool 100 further includes a seal 30, which can be a sealing ring. The seal 30 is used to seal the blade body 10 and the mounting part 22. After the cooling medium flows through the bend of the first flow channel 2221 and the second flow channel 2222, the pressure of the cooling medium in the flow channel is controlled, which can reduce the impact of the cooling medium on the seal 30, reduce the probability of the seal 30 shifting, and make the seal more stable.

[0028] like Figure 2 and Figure 3 As shown, in some embodiments, the mounting part 22 has a first positioning groove 221. The first positioning groove 221 is located at the end of the first flow channel 2221 away from the second flow channel 2222, that is, the first positioning groove 221 is located at the junction of the mounting part flow channel 222 and the blade flow channel 11. The first positioning groove 221 is located on the outer periphery of the first flow channel 2221 and is connected to the first flow channel 2221. The sealing member 30 can be installed into the first positioning groove 221. When the clamping part 225 clamps the blade body 10, the first clamping surface 2251 is in close contact with the first contact surface 14. The sealing member 30 is pressed into the first positioning groove 221 by the blade body 10. The sealing member 30 can block the gap at the junction of the first flow channel 2221 and the blade flow channel 11, reduce the probability of the cooling medium leaking out through the gap, thereby reducing the pressure loss of the cooling medium and keeping the pressure of the cooling medium stable.

[0029] like Figures 5-7 As shown, in some embodiments, the blade body 10 has a second positioning groove 12. The second positioning groove 12 is located at one end of the blade flow channel 11 near the mounting flow channel 222, that is, the second positioning groove 12 is located at the junction of the mounting flow channel 222 and the blade flow channel 11. The second positioning groove 12 is located on the outer periphery of the blade flow channel 11 and is connected to the mounting flow channel 222. The sealing member 30 can be installed in the second positioning groove 12. When the clamping part 225 clamps the blade body 10, the first clamping surface 2251 is in close contact with the first contacting surface 14. The sealing member 30 is pressed into the second positioning groove 12 by the clamping part 225. The sealing member 30 can block the gap at the junction of the first flow channel 2221 and the blade flow channel 11, reduce the probability of the cooling medium leaking out through the gap, thereby reducing the pressure loss of the cooling medium and keeping the pressure of the cooling medium stable.

[0030] In some embodiments, the cross-sectional size of the tool holder flow channel 211 gradually decreases. The gradually decreasing cross-sectional size can increase the flow rate of the cooling medium and appropriately increase the impact force of the cooling medium to improve the chip breaking and chip removal effect.

[0031] In some embodiments, the cross-sectional dimensions of the mounting section flow channel 222 gradually decrease. This gradually decreasing cross-sectional dimension can increase the flow rate of the cooling medium and appropriately enhance the impact force of the cooling medium, thereby improving the chip breaking and removal effects.

[0032] Understandably, one end of the tool holder flow channel 211 can form an external pipe interface 212, which can connect the tool holder flow channel 211 to an external pipe. Thus, a cooling medium can be introduced into the tool holder flow channel 211 through the external pipe interface 212. The cooling medium can be cutting fluid or cutting oil. The cooling medium can flow through the tool holder flow channel 211, the mounting section flow channel 222, and the cutting tool flow channel 11, and finally be sprayed out from the outlet 111 of the cutting tool flow channel. The cooling medium can be pressurized by a power device such as a centrifugal pump. The high-velocity and high-pressure cooling medium can impact the chips, making the chips easier to break and remove. This allows the cooling medium to reach the narrow contact area between the workpiece and the tool. Furthermore, the cooling medium can exchange heat with the tool, continuously removing the cutting heat generated by the cutting edge 13 and the cutting tool 100, avoiding the formation of built-up edge due to high temperature and chip retention, and improving the machining quality of the workpiece.

[0033] like Figure 3 and Figure 4 As shown, in some embodiments, the diameter of the tool holder flow channel 211 is larger than the diameter of the mounting flow channel 222, that is, the cross-sectional area of ​​the mounting flow channel 222 is smaller than the cross-sectional area of ​​the tool holder flow channel 211. When the cooling medium flows from the tool holder flow channel 211 to the mounting flow channel 222, the flow rate of the cooling medium increases, appropriately increasing the impact kinetic energy of the cooling medium when it is ejected from the outlet 111 of the blade flow channel, thereby impacting the chips with a larger impact force and improving the chip breaking and chip removal effect; a transition is provided between the tool holder flow channel 211 and the mounting flow channel 222. The inlet of the transition channel 223 is connected to the outlet of the tool holder channel 211, and the outlet of the transition channel 223 is connected to the inlet of the mounting section channel 222, so that the tool holder channel 211 and the mounting section channel 222 are connected through the transition channel 223. The cross-sectional dimension of the transition channel 223 gradually decreases along the direction close to the mounting section channel 222. The gradually decreasing transition channel 223 can reduce the local pressure loss caused by the sudden change in diameter, reduce the probability of pressure fluctuation, and improve the stability of the cooling medium pressure.

[0034] like Figures 1-4 As shown, in some embodiments, the mounting portion 22 includes a clamping portion 225 and a locking portion 224, the locking portion 224 being connected to the tool holder body 21 in such a manner as... Figure 1At one end of the first direction shown, the clamping part 225 is connected to the locking part 224 at the end away from the tool holder body 21. That is, the locking part 224 is located between the tool holder body 21 and the clamping part 225. The clamping part 225 can clamp the blade body 10. The clamping part 225 and the locking part 224 can be integrally molded, or the clamping part 225 can be mounted on the locking part 224.

[0035] The clamping part 225 has a first clamping surface 2251 and a second clamping surface 2252, the first clamping surface 2251 and the second clamping surface 2252 being in a third direction as follows: Figure 2 The blade body 10 is arranged opposite to each other in the F3 direction. The first clamping surface 2251 and the second clamping surface 2252 can be convex surfaces. The liquid outlet of the mounting section flow channel 222 is located on the first clamping surface 2251. The blade body 10 has a first contact surface 14 and a second contact surface 15 in the third direction. The first contact surface 14 and the second contact surface 15 can be concave surfaces. The liquid inlet 112 of the blade flow channel is located on the first contact surface 14. The locking part 224 has a fastener 2241 and a fastener along the first contact surface 2252. The threaded hole 2242 extends in three directions. The fastener 2241 can be inserted into the threaded hole 2242 so that the first clamping surface 2251 is in close contact with the first mating surface 14, and the second clamping surface 2252 is in close contact with the second mating surface 15. The convex surface and the concave surface are interlocked, so that the clamping part 225 clamps the blade body 10 and connects the liquid outlet of the mounting part flow channel 222 with the liquid inlet 112 of the blade flow channel, thereby realizing the connection between the mounting part flow channel 222 and the blade flow channel 11.

[0036] In the second direction, such as Figure 2 In the F2 direction shown, the clamping part 225 is eccentrically positioned relative to the center of the tool holder body 21. At least a portion of the mounting flow channel 222 is located in the clamping part 225. The tool holder flow channel 211 extends along the first direction, and the centerline of the tool holder flow channel 211 is parallel to the centerline of the second flow channel 2222. The transition flow channel 223 is located on one side of the fastener 2241. The transition flow channel 223 can extend in a direction inclined to the first direction, thereby allowing the transition flow channel 223 to avoid the fastener 2241, reducing interference between the internal flow channel of the cutting tool 100 and the mounting structure of the cutting tool 100, and enabling the internal flow channel of the cutting tool 100 to be arranged compactly and reasonably in a limited space.

[0037] In some embodiments, the clamping part 225 is disposed directly opposite the center of the tool holder body 21, and the transition flow channel 223 can be an arc-shaped flow channel to avoid the fastener 2241 and connect the tool holder flow channel 211 and the mounting part flow channel 222, thereby reducing the interference between the internal flow channel of the cutting tool 100 and the mounting structure of the cutting tool 100.

[0038] like Figure 2As shown, in some embodiments, the cutting tool 100 further includes a seal 30, which may be a sealing ring, and the seal 30 is used to seal the blade body 10 and the mounting portion 22.

[0039] like Figure 2 and Figure 3 As shown, in some embodiments, the mounting part 22 has a first positioning groove 221. The first positioning groove 221 is located at the end of the first flow channel 2221 away from the second flow channel 2222, that is, the first positioning groove 221 is located at the junction of the mounting part flow channel 222 and the blade flow channel 11. The first positioning groove 221 is located on the outer periphery of the first flow channel 2221 and is connected to the first flow channel 2221. The sealing member 30 can be installed into the first positioning groove 221. When the clamping part 225 clamps the blade body 10, the first clamping surface 2251 is in close contact with the first contact surface 14. The sealing member 30 is pressed into the first positioning groove 221 by the blade body 10. The sealing member 30 can block the gap at the junction of the first flow channel 2221 and the blade flow channel 11, reduce the probability of the cooling medium leaking out through the gap, thereby reducing the pressure loss of the cooling medium and keeping the pressure of the cooling medium stable.

[0040] like Figures 5-7 As shown, in some embodiments, the blade body 10 has a second positioning groove 12. The second positioning groove 12 is located at one end of the blade flow channel 11 near the mounting flow channel 222, that is, the second positioning groove 12 is located at the junction of the mounting flow channel 222 and the blade flow channel 11. The second positioning groove 12 is located on the outer periphery of the blade flow channel 11 and is connected to the mounting flow channel 222. The sealing member 30 can be installed in the second positioning groove 12. When the clamping part 225 clamps the blade body 10, the first clamping surface 2251 is in close contact with the first contacting surface 14. The sealing member 30 is pressed into the second positioning groove 12 by the clamping part 225. The sealing member 30 can block the gap at the junction of the first flow channel 2221 and the blade flow channel 11, reduce the probability of the cooling medium leaking out through the gap, thereby reducing the pressure loss of the cooling medium and keeping the pressure of the cooling medium stable.

[0041] like Figure 5 As shown, in some embodiments, the blade body 10 has a first contact surface 14 near the mounting section flow channel 222. The angle between the axis of the blade flow channel 11 and the center line of the first contact surface 14 is α, that is, α is the tilt angle of the blade flow channel 11. When α is too small, the cooling medium acts too close to the cutting edge 13 after being sprayed out, and the cooling medium can only act on part of the cutting area, which cannot achieve good cooling and reduces the chip breaking effect. When α is too large, the cooling medium acts too far away from the cutting edge 13 after being sprayed out, and the cooling medium is difficult to flow to the cutting area and cannot achieve chip breaking and chip removal.

[0042] By limiting α to between 15° and 45°, α can be any value of 15°, 20°, 25°, 30°, 35°, 40°, or 45°, or any value between two of these values. By controlling α within the above range, the cooling medium can impact the chips, causing them to break and flow away. At the same time, it can cover the cutting area that needs cooling, reducing the impact of high temperature and chip retention on the machining process and improving the machining quality of the workpiece.

[0043] like Figures 1-3 As shown, in some embodiments, the extension direction of the first flow channel 2221 is perpendicular to the center line of the first mating surface 14, so that when the cooling medium flows into the blade flow channel 11 from the first flow channel 2221, the impact force generated by the cooling medium on the blade body 10 is approximately in a direction perpendicular to the blade body 10. Thus, the impact force generated by the cooling medium on the blade body 10 is not in the same direction as the impact force on the workpiece, thereby minimizing the oblique impact of the cooling medium on the blade body 10 when it flows into the blade flow channel 11 and reducing the impact on machining.

[0044] like Figure 5 As shown, in some embodiments, the cross-sectional area of ​​the blade flow channel 11 gradually decreases along the direction close to the cutting edge 13. The inclination angle of the outer wall surface of the blade flow channel 11 relative to the axis of the blade flow channel 11 is δ. When δ is too large, the cross-sectional area of ​​the blade flow channel 11 changes too much, resulting in the outlet diameter 111 of the blade flow channel being too small. This makes the effective area of ​​the sprayed cooling medium too small, unable to cover the cutting area that needs to be cooled, and also unable to achieve a good chip breaking and chip removal effect.

[0045] Limiting 2δ to less than or equal to 15°, i.e. limiting δ to less than or equal to 7.5°, the cross-sectional area of ​​the blade flow channel 11 gradually decreases, which can increase the flow rate of the cooling medium and increase the impact kinetic energy of the cooling medium. Furthermore, the smaller outlet 111 of the blade flow channel can make the sprayed cooling medium more concentrated, allowing the cooling medium to impact the chips with a greater impact force, thereby improving the chip breaking and chip removal effect of the cooling medium.

[0046] In some embodiments, δ is 0°, meaning the cross-sectional area of ​​the blade flow channel 11 remains constant, which allows the cooling medium to act over a larger area after being sprayed out, thereby covering a wider workpiece processing area.

[0047] like Figure 5As shown, in some embodiments, the blade flow channel 11 is located on one side of the cutting edge 13 in the first direction, and the outlet 111 of the blade flow channel is close to the cutting edge 13, while the inlet 112 of the blade flow channel is away from the cutting edge 13. That is, the blade flow channel 11 is inclined towards the cutting edge 13 in a direction away from the second flow channel 2222, so that the outlet 111 of the blade flow channel is close to the cutting edge 13, thereby allowing the cooling medium to reach the cutting area more quickly. The cutting edge 13 extends in the second direction, and the distance between the outlet 111 of the blade flow channel and the cutting edge 13 in the first direction is D1. The distance between the liquid inlet 112 of the blade flow channel and the cutting edge 13 in the first direction is D2, and the length of the blade body 10 in the first direction is D3. When D1 is too large, the liquid outlet 111 of the blade flow channel is far from the cutting edge 13, and the cooling medium cannot act on the cutting area that needs to be cooled and chip-breaking after it is sprayed out. By limiting 2D1≤D2 and D2<D3, the liquid outlet position of the blade flow channel 11 can be restricted, so that the cooling medium can act on the cutting area after it is sprayed out, thereby realizing the impact on the chips in the cutting area, and cooling the parts that generate cutting heat while carrying away the chips.

[0048] like Figure 6 As shown, in some embodiments, the length of the cutting edge 13 in the second direction is L, and the distance between the axis of the blade flow channel 11 and the edge of the blade body 10 in the second direction is L1. For a certain size cutting edge 13, if L1 is too small or too large, the blade flow channel 11 will be too close to the edge of the blade body 10, making the wall thickness of the blade flow channel 11 too thin, resulting in a decrease in the strength of the blade body 10. By limiting 0.15L≤L1≤0.5L, the distance between the blade flow channel 11 and the two sides of the blade body 10 in the second direction can be controlled, so that the wall thickness of the blade flow channel 11 on both sides in the second direction is moderate, reducing the probability that the strength of the blade body 10 will decrease due to the wall thickness on one side being too thin. This reduces the risk of the blade body 10's impact resistance decreasing and even crushing during cutting, and improves the strength stability of the blade body 10.

[0049] like Figure 7As shown, in some embodiments, the blade flow channel 11 may include a main flow channel 113 and multiple branch flow channels 114. One end of the main flow channel 113 is connected to the mounting flow channel 222, and the multiple branch flow channels 114 are located at the other end of the main flow channel 113. One end of each branch flow channel 114 is connected to the main flow channel 113. The angle between the axis of the multiple branch flow channels 114 and the center line of the first contact surface 14 may be the same. The other end of each branch flow channel 114 forms a liquid outlet adjacent to the cutting edge 13. The cutting edge 13 extends along the second direction. The liquid outlets of the multiple branch flow channels 114 are arranged at intervals along the extension direction of the cutting edge 13. The liquid outlets of the multiple branch flow channels 114 can form multi-point directional spraying within the entire field of the cutting edge 13, which can realize uniform cooling of the cutting edge 13 and segmented impact crushing of chips, thereby improving the cooling and chip breaking effect.

[0050] like Figure 7 As shown, the distance between the center of the outlet 111 of the multiple blade channels formed by the multiple branch channels 114 and the edge of the blade body 10 in the second direction is L2, and the distance between the axis of the main channel 113 and the edge of the blade body 10 in the second direction is L3. When L2 is too large, the branch channels 114 will be concentrated on one side of the blade body 10, making the strength of the blade body 10 uneven in the second direction. Limiting L3 to L2 can make the spacing of the branch channels 114 in the second direction reasonable, preventing the arrangement of the branch channels 114 in the second direction from being too eccentric, thereby reducing the risk of stress concentration caused by uneven strength of the blade body 10 in the second direction and improving the strength stability of the blade body 10.

[0051] like Figure 7 As shown, the center-to-center distance between the outlets 111 of the multiple blade channels formed by the multiple branch channels 114 is L4. If L4 is too small, the wall thickness of the adjacent branch channels 114 will be too thin, which will cause the blade body 10 to have low strength at the thin wall. By limiting L4 to ≥ 0.4 mm, the wall thickness of the branch channels 114 on both sides in the second direction is moderate, which reduces the probability of the blade body 10's strength decreasing due to the wall thickness on one side being too thin, and improves the strength stability of the blade body 10.

[0052] In some embodiments, the angle between the axis of the multiple branch channels 114 and the center line of the first contact surface 14 can be different, so that the cooling medium can be sprayed out at different angles and act on different parts of the chip to achieve different chip breaking and cooling effects, so that the cutting tool 100 can be applied to different processing scenarios.

[0053] Other configurations and operations of the cutting tool 100 according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here. The vertical, horizontal, and front-back directions are defined as shown in the figures.

[0054] In the description of this invention, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features not in direct contact but through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature.

[0055] 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 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.

[0056] Although embodiments of the 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 invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A cutting tool (100), characterized in that, include: The blade body (10) has a cutting edge (13) and a blade flow channel (11) adjacent to the cutting edge (13). A tool holder (20) includes a tool holder body (21) and a mounting part (22). The tool holder body (21) has a tool holder flow channel (211), one end of which is connected to the outside. The mounting part (22) has a mounting part flow channel (222), which is connected to the tool holder flow channel (211). The mounting part flow channel (222) includes a first flow channel (2221) and a second flow channel (2222). The first flow channel (2221) is located at the end of the second flow channel (2222) away from the tool holder flow channel (211). The blade body (10) is adapted to be installed in the mounting part (22), the blade flow channel (11) is connected to the first flow channel (2221) of the mounting part flow channel (222), the extension direction of the first flow channel (2221) intersects the extension direction of the second flow channel (2222), and the extension direction of the first flow channel (2221) intersects the extension direction of the blade flow channel (11).

2. The cutting tool (100) according to claim 1, characterized in that, The diameter of the tool bar flow channel (211) is larger than the diameter of the mounting section flow channel (222). A transition flow channel (223) is provided between the tool bar flow channel (211) and the mounting section flow channel (222). The cross-sectional dimension of the transition flow channel (223) gradually decreases along the direction close to the mounting section flow channel (222).

3. The cutting tool (100) according to claim 2, characterized in that, The mounting portion (22) includes a clamping portion (225) and a locking portion (224). The locking portion (224) is connected to one end of the tool holder body (21) in a first direction. The clamping portion (225) is connected to the end of the locking portion (224) away from the tool holder body (21). The clamping portion (225) is adapted to clamp the blade body (10). The locking portion (224) has a fastener (2241) for clamping the clamping portion (225). In the second direction, the clamping part (225) is eccentrically disposed relative to the center of the tool holder body (21), at least a portion of the mounting part flow channel (222) is disposed in the clamping part (225), the tool holder flow channel (211) extends along the first direction and its center line is parallel to the center line of the second flow channel (2222) of the mounting part flow channel (222), the transition flow channel (223) is located on one side of the fastener (2241), the transition flow channel (223) extends along a direction inclined to the first direction and both ends of the transition flow channel (223) are respectively connected to the tool holder flow channel (211) and the mounting part flow channel (222), and the first direction is perpendicular to the second direction.

4. The cutting tool (100) according to claim 1, characterized in that, Also includes: A sealing element (30) seals the connection between the mounting part (22) and the blade body (10). The mounting portion (22) has a first positioning groove (221), which is located at the end of the first flow channel (2221) away from the second flow channel (2222). The first positioning groove (221) is located on the outer periphery of the first flow channel (2221) and communicates with the first flow channel (2221). The sealing member (30) is adapted to be installed in the first positioning groove (221); and / or, The blade body (10) has a second positioning groove (12), which is located at one end of the blade flow channel (11) near the mounting section flow channel (222). The second positioning groove (12) is located on the outer periphery of the blade flow channel (11) and communicates with the mounting section flow channel (222). The seal (30) is adapted to be installed in the second positioning groove (12).

5. The cutting tool (100) according to claim 1, characterized in that, The blade body (10) has a first contact surface (14) close to the mounting section flow channel (222), and the angle between the axis of the blade flow channel (11) and the center line of the first contact surface (14) is α, which satisfies: 15°≤α≤45°.

6. The cutting tool (100) according to claim 5, characterized in that, The extension direction of the first flow channel (2221) is perpendicular to the center line of the first mating surface (14).

7. The cutting tool (100) according to claim 1, characterized in that, Along the direction close to the cutting edge (13), the cross-sectional area of ​​the blade flow channel (11) gradually decreases.

8. The cutting tool (100) according to claim 1, characterized in that, The blade flow channel (11) is located on one side of the cutting edge (13) in the first direction and has an outlet close to the cutting edge (13) and an inlet away from the cutting edge (13). The cutting edge (13) extends in the second direction. The distance between the outlet and the cutting edge (13) in the first direction is D1, the distance between the inlet and the cutting edge (13) in the first direction is D2, and the length of the blade body (10) in the first direction is D3, satisfying: 2D1≤D2 and D2<D3, and the first direction is perpendicular to the second direction.

9. The cutting tool (100) according to claim 8, characterized in that, The length of the cutting edge (13) in the second direction is L, and the distance between the axis of the blade flow channel (11) and the edge of the blade body (10) in the second direction is L1, satisfying: 0.15L≤L1≤0.5L.

10. The cutting tool (100) according to claim 1, characterized in that, The blade flow channel (11) may include a main flow channel (113) and a plurality of branch flow channels (114). One end of the main flow channel (113) is connected to the mounting section flow channel (222). The plurality of branch flow channels (114) are located at the other end of the main flow channel (113), and one end of each branch flow channel (114) is connected to the main flow channel (113). The other end of each branch flow channel (114) forms a liquid outlet adjacent to the cutting edge (13). The plurality of liquid outlets are arranged at intervals along the extension direction of the cutting edge (13). Wherein, the cutting edge (13) extends along the second direction, the distance between the center of the plurality of liquid outlets and the edge of the blade body (10) in the second direction is L2, the distance between the axis of the main flow channel (113) and the edge of the blade body (10) in the second direction is L3, satisfying: L3>L2; the distance between the center of the liquid outlets of the plurality of branch flow channels (114) is L4, satisfying: L4≥0.4mm.

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