End mill

Abstract

The end milling cutter comprises a cutter body and an oscillating heat pipe, the cutter body comprises a cutter handle and a cutter head which are arranged in the axial direction, a plurality of heat dissipation grooves extending in the axial direction are formed in the outer wall of the cutter handle, the heat dissipation grooves are formed in the circumferential direction of the cutter handle at intervals, and the oscillating heat pipe comprises a contact section and a heat dissipation section which are communicated in the axial direction; the contact sections are correspondingly attached and embedded into the heat dissipation grooves and extend towards the tool bit along the heat dissipation grooves, the heat dissipation sections protrude out of the contact sections outwards through the bent parts and are arranged at intervals with the tool handle in the radial direction, and the oscillation heat pipes are arranged at intervals in the circumferential direction and fixedly connected to the tool handle through the fixing assembly. According to the end mill disclosed by the invention, the oscillating heat pipe is arranged on the cutter handle, so that the end mill can utilize phase change of the oscillating heat pipe to circularly and continuously dissipate heat during cutting, the temperature of the cutter head is quickly reduced when the temperature of the cutter head is increased, and the phenomenon that the cutter head is damaged due to over-high temperature during material cutting of the end mill is avoided. And the use of the material is influenced by such defects as layering and burrs of the cut material.

Description

Technical Field

[0001] This disclosure relates to the field of milling cutter technology, and more specifically, to an end mill. Background Technology

[0002] When end mills are used to cut composite materials, the interfacial bonding characteristics between the composite fiber and the matrix make it easy for chip buildup to occur on the cutting edge during the cutting process. This chip buildup hinders heat dissipation, causing a rapid increase in temperature in the cutting zone, which in turn exacerbates tool wear, leads to edge chipping, and causes softening of the composite matrix and fiber scorching. Related technologies typically use casting to cool the end mills; however, this method is prone to the problem of cooling media remaining in the material pores, damaging product performance. Summary of the Invention

[0003] The purpose of this disclosure is to provide an end mill that can effectively reduce the temperature of the cutting zone when the end mill is cutting materials.

[0004] To achieve the above objectives, this disclosure provides an end mill, comprising: The blade body includes a handle and a blade head arranged along the axial direction. The outer wall of the handle is provided with heat dissipation grooves extending along the axial direction. Multiple heat dissipation grooves are provided and spaced apart along the circumference of the handle. An oscillating heat pipe includes a contact section and a heat dissipation section that communicate along the axial direction. The contact section is correspondingly fitted and embedded in the heat dissipation groove and extends along the heat dissipation groove toward the cutting head. The heat dissipation section protrudes outward from the contact section through a bend and is radially spaced from the cutting head. The oscillating heat pipes are multiple and spaced apart along the circumference, and the multiple heat dissipation sections extend along the axial direction and are fixedly connected to the tool holder by a fixing component.

[0005] Optionally, a stepped portion is formed between the handle and the blade head, and the end of the heat dissipation groove near the blade head passes through the stepped portion, so that the end face of the contact section faces the blade head.

[0006] Optionally, the length of the handle is 90-110mm, the diameter is 15-25mm, the heat dissipation groove extends radially inward along the handle by a distance of 3-5mm, and the groove width along the circumference of the handle is 8-12mm.

[0007] Optionally, the fixing component includes a first fixing member and a second fixing member, which are disposed opposite to each other and detachably fixedly connected to form a connecting hole for cooperating with the knife handle between the first fixing member and the second fixing member, and an anti-slip pad is provided in the connecting hole.

[0008] Optionally, the first fixing member and the second fixing member include a semi-circular mating part and a connecting part. The inner ring of the mating part is used to abut against the knife handle, and the connecting part is used to fix the first fixing member and the second fixing member together and to press the inner ring of the mating part against the knife handle. The connecting part includes connecting plates disposed at both radial ends of the mating part. The connecting plates are provided with fastening holes for engaging with fasteners to fix the two connecting plates disposed opposite to each other on the first fixing member and the second fixing member.

[0009] Optionally, the first and second fixing members are provided with weight-reducing grooves, and the weight-reducing grooves and the oscillating heat pipes on the first and second fixing members are symmetrically arranged.

[0010] Optionally, the first and second fixing members are provided with a plurality of support frames protruding from the top surface along the axial direction, the oscillating heat pipe is annular, the inner ring of the heat dissipation section abuts against the support frame, and the contact section passes through the first or second fixing member and extends along the first direction.

[0011] Optionally, the support frame has an abutment portion at the end away from the first and second fixing members, the abutment portion being adapted to the inner ring shape of the heat dissipation section and abutting against the inner ring of the heat dissipation section.

[0012] Optionally, the oscillating heat pipe has a diameter of 6.5-7.5 mm, a width of 8-12 mm, and an axial extension length of 90-110 mm. The oscillating heat pipe is pre-filled with coolant of 30%-50% by mass, and the oscillating heat pipe is evacuated to a pressure of 4.5-5.5 Pa.

[0013] Optionally, the end mill is used to machine AFRP composite materials.

[0014] The advantages of this disclosure through the above technical solution are as follows: the end mill of this disclosure is that by setting an oscillating heat pipe on the tool holder, the end mill can continuously dissipate heat by utilizing the phase change cycle of the oscillating heat pipe when cutting, thereby giving the end mill of this disclosure high heat dissipation efficiency. When the temperature at the tool tip rises, it can quickly reduce the temperature at the tool tip, avoiding defects such as delamination and burrs in the cut material due to excessive temperature when the end mill is cutting the material, which would affect the use of the material.

[0015] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the structure of the end mill provided in an exemplary embodiment of this disclosure; Figure 2 This is a schematic diagram of the structure of the end mill body provided in an exemplary embodiment of this disclosure; Figure 3 This is a schematic diagram of the structure of the fixing member in the end mill provided in an exemplary embodiment of this disclosure; Figure 4 This is an exploded view of the fixing member in the end mill provided in an exemplary embodiment of this disclosure.

[0017] Explanation of reference numerals in the attached figures 1-Tool body; 11-Tool holder; 111-Heat sink; 12-Tool tip; 13-Step section; 2-Fixing component; 21-First fixing member; 22-Second fixing member; 23-Connecting hole; 231-Anti-slip pad; 24-Matching part; 25-Connecting part; 251-Connecting plate; 252-Fastening hole; 253-Fastener; 26-Support frame; 261-Abutting part; 27-Weight reduction groove; 3-Oscillating heat pipe; 31-Contact section; 32-Heat dissipation section; 33-Bending section. Detailed Implementation

[0018] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0019] In this disclosure, unless otherwise stated, directional terms such as "upper," "lower," "higher," "lower," "top," and "bottom" generally refer to the orientation of the corresponding component or structure in the direction of gravity. "Inner" and "outer" refer to the inner and outer contours of the corresponding component. Furthermore, it should be noted that terms such as "first" and "second" are used to distinguish one element from another and do not indicate sequence or importance. Additionally, in the description with reference to the accompanying drawings, the same reference numerals in different drawings denote the same element. The above definitions are for explanation and illustration only and should not be construed as limiting this disclosure.

[0020] This disclosure relates to an end mill that effectively cools the cutter body 1 during material cutting, preventing excessive temperature of the cutter body 1 from affecting material cutting and the quality of the cut material. See [link to relevant documentation]. Figure 1 and Figure 2The end mill disclosed herein includes a cutter body 1, a fixing component 2, and an oscillating heat pipe 3. The cutter body 1 is the main body of the end mill and can be made of metal material, depending on the actual situation such as the material to be cut. The cutter body 1 includes a shank 11 and a cutter head 12 arranged along the axial direction of the cutter body 1. The shank 11 is the part that connects the end mill to the external mechanical structure. For example, it can be connected to a machine tool through the shank 11 so that the machine tool can drive the end mill to move through the shank 11. Multiple heat dissipation grooves 111 extending along the axial direction of the shank 11 are also provided on the outer wall of the shank 11. The multiple heat dissipation grooves 111 are arranged circumferentially around the shank 11 to increase the heat dissipation area of ​​the shank 11. The cutter head 12 is connected to the shank 11 and can move with the shank 11 to complete the cutting of the material.

[0021] The oscillating heat pipe 3 includes a contact section 31 and a heat dissipation section 32 connected along the axial direction of the blade body 1. The contact section 31 can be correspondingly fitted and embedded into the heat dissipation groove 111 on the handle 11 and extends toward the blade head 12 so that the contact section 31 can have a large contact area with the handle 11. The heat dissipation section 32 is connected to the contact section 31 through a bending portion 33 and protrudes outward from the contact section 31 so that the heat dissipation section 32 and the contact section 31 are radially spaced relative to the handle 11.

[0022] By installing an oscillating heat pipe 3 on the tool holder 11, when the end mill is cutting, the heat transferred from the cutting head 12 to the tool holder 11 can be transferred through the heat dissipation groove 111 on the tool holder 11 to the contact section 31 of the oscillating heat pipe 3. Since the heat dissipation groove 111 and the contact section 31 extend along the axial direction of the tool holder 11, the heat dissipation groove 111 and the contact section 31 can better absorb the heat generated by the cutting head 12 during cutting, and can also ensure that there is a larger heat dissipation area between the heat dissipation groove 111 and the contact section 31. After heat is transferred to the contact section 31, the heat will cause the liquid in the oscillating heat pipe 3 to evaporate. During the evaporation process, some heat will be consumed. Then the steam will flow in the oscillating heat pipe 3 to the heat dissipation section 32. Since the heat dissipation section 32 is far away from the cutting head 12 in both the radial and axial directions along the handle 11, the heat dissipation section 32 has a lower temperature to dissipate heat and cool the steam flowing into the heat dissipation section 32. The cooled steam will re-liquefy into liquid and flow back to the contact section 31 to continue to absorb heat from the contact section 31 for cyclic cooling.

[0023] The number of oscillating heat pipes 3 can be set to match the number of heat dissipation slots 111, and they are arranged at intervals along the circumference of the tool holder 11. The oscillating heat pipes 3 and the tool holder 11 can be connected by the fixing component 2. For example, the heat dissipation section 32 of multiple oscillating heat pipes 3 also extends along the axial direction of the tool holder 11 and cooperates with the fixing component 2 to complete the connection between the oscillating heat pipes 3 and the tool holder 11.

[0024] The end mill disclosed herein has an oscillating heat pipe 3 installed on the shank 11, which enables the end mill to continuously dissipate heat during cutting by utilizing the phase change cycle of the oscillating heat pipe 3. This results in the end mill having high heat dissipation efficiency, and can quickly reduce the temperature at the cutter tip 12 when the temperature rises. This prevents the end mill from causing defects such as delamination and burrs in the cut material due to excessive temperature during material cutting, thus affecting the use of the material.

[0025] In some embodiments of this disclosure, see Figure 1 and Figure 2 A stepped portion 13 is formed between the shank 11 and the cutter head 12. The heat dissipation groove 111 is disposed near the end of the cutter head 12, extending through the stepped portion 13, so that the end face of the contact section 31 of the oscillating heat pipe 3 located in the heat dissipation groove 111 can face the cutter head 12. This arrangement allows the heat generated by the cutter head 12 during the cutting process to be better transferred to the contact section 31 through the stepped portion 13, increasing the speed at which the contact section 31 absorbs heat, thereby increasing the overall heat dissipation efficiency of the end mill.

[0026] In some embodiments of this disclosure, the length of the tool holder 11 is 90-110 mm, the tool holder 11 can be cylindrical with a diameter of 15-25 mm, the heat dissipation groove 111 extends radially inward along the tool holder 11 by a distance of 3-5 mm, and the groove width along the circumference of the tool holder 11 is 8-12 mm. The length and diameter of the tool holder 11 can be determined according to the size of the machine tool or the material to be cut. The radially inward extension distance of the heat dissipation groove 111 along the tool holder can be determined according to the diameter and groove width of the tool holder 11, as well as the size of the oscillating heat pipe 3 and the heat dissipation intensity required by the end mill when cutting materials. The above data are embodiments with high applicability of the end mill of this disclosure. The specific size of the heat dissipation groove 111 of the tool holder 11 can be determined according to the above actual situation, and this disclosure does not limit it.

[0027] In some embodiments of this disclosure, see Figure 3 and Figure 4 The fixing component 2 includes a first fixing member 21 and a second fixing member 22. The first fixing member 21 and the second fixing member 22 are arranged opposite to each other and can be detachably fixed together so that the oscillating heat pipe 3 located on the fixing component 2 can be detachably installed and removed from the knife handle 11, which is convenient for replacement after the oscillating heat pipe 3 has been used for a long time or has been damaged.

[0028] When connecting to the handle 11, the first fixing member 21 and the second fixing member 22 can be connected first. After the first fixing member 21 and the second fixing member 22 are connected, a connecting hole 23 that can cooperate with the handle 11 will be formed between the first fixing member 21 and the second fixing member 22. Then the handle 11 can be put into the connecting hole 23, and the first connecting member 21 and the second connecting member 22 can be locked to complete the connection between the handle 11 and the fixing component 2. Of course, the connection can also be made directly at the handle 11, without having to put the handle 11 into the connecting hole 23. This will not be elaborated further here.

[0029] In some other embodiments, see Figure 3 and Figure 4 An anti-slip pad 231 can also be provided in the connecting hole 23. The shape of the anti-slip pad 231 can be determined according to the shape of the connecting hole 23, for example, it can be an annular shape. By providing the anti-slip pad 231 in the connecting hole 23, the stability of the connection between the first fixing member 21 and the second fixing member 22 and the tool holder 11 can be increased, preventing the tool holder 11 from falling off the fixing assembly 2 during cutting, which would cause cutting failure and material damage. The material of the anti-slip pad 231 can be rubber, resin, or other materials known to those skilled in the art, which will not be described in detail here.

[0030] In some embodiments of this disclosure, see Figure 3 and Figure 4 The handle 11 can be cylindrical. The first fixing member 21 and the second fixing member 22 include a semi-circular mating part 24 and a connecting part 25. When connecting the fixing component 2 and the handle 11, the inner ring of the mating part 24 can abut against the handle 11. The anti-slip pad 231 can also be set in the inner ring of the mating part 24. The connecting part 25 can fix the first fixing member 21 and the second fixing member 22 and press the inner ring of the mating part 24 against the outer wall of the handle 11 to ensure the stability of the connection between the mating part 24 and the handle 11.

[0031] Specifically, the connecting portion 25 may include connecting plates 251 disposed at both radial ends of the mating portion 24. The connecting plates 251 are provided with fastening holes 252, which can cooperate with fasteners 253 to fix the two connecting plates 251 disposed opposite to the first fixing member 21 and the second fixing member 22, thereby fixing the first fixing member 21 and the second fixing member 22 together. The fastening holes 252 and the fasteners 253 can be threaded holes and bolts, respectively. During connection, the fastening holes 252 on the two connecting plates 251 on the same side of the mating portion 24 can be aligned, and then the bolts can be screwed into the fastening holes 252 to complete the detachable fixed connection between the two connecting plates 251. The two connecting plates 251 on the other side can also be connected in the same way to complete the detachable fixed connection between the first fixing member 21 and the second fixing member 22. Of course, in other embodiments, the mating portion 24 and the connecting portion 25 may also have other structures, depending on the actual situation, and this disclosure does not impose any limitations on this.

[0032] In some embodiments of this disclosure, weight-reducing grooves 27 are provided on the first fixing member 21 and the second fixing member 22, and the weight-reducing grooves 27 and the oscillating heat pipe 3 on the first fixing member 21 and the second fixing member 22 are symmetrically arranged. By providing weight-reducing grooves 27, the weight of the entire fixing assembly 2 can be effectively reduced, avoiding the connection between the tool holder 11 and the machine tool due to the large weight of the fixing assembly 2, which would then affect the cutting performance of the end mill. The symmetrical arrangement of the weight-reducing grooves 27 and the oscillating heat pipe 3 on the first fixing member 21 and the second fixing member 22 can prevent the weight imbalance of the tool body 1 after the end mill is connected to the machine tool due to the weight-reducing grooves 27 and the oscillating heat pipe 3, thus avoiding the impact on the cutting performance of the end mill.

[0033] In some embodiments of this disclosure, see Figure 3 and Figure 4 The first fixing member 21 and the second fixing member 22 are provided with a support frame 26 on the top surface along the axial direction of the tool holder 11. The oscillating heat pipe 3 is annular. By providing the support frame 26 on the first fixing member 21 and the second fixing member 22, the oscillating heat pipe 3 can be limited and connected to the first fixing member 21 and the second fixing member 22 by the support frame 26.

[0034] Specifically, when connecting the oscillating heat pipe 3 to the first fixing member 21 and the second fixing member 22, the inner ring of the heat dissipation section 32 of the oscillating heat pipe 3 can be abutted against the support frame 26 first. Since the support frame 26 extends along the axis of the tool holder 11, after the heat dissipation section 32 abuts against the support frame 26, the support frame 26 can restrict the axial movement of the oscillating heat pipe 3 relative to the tool holder 11. The distance between the heat dissipation section 32 of the oscillating heat pipe 3 and the tool head 12 can also be controlled by adjusting the extension length of the support frame 26 along the axial direction of the tool holder 11. The contact section 31 of the oscillating heat pipe 3 will penetrate the first fixing member 21 and the second fixing member 22 and extend along the axial direction of the tool holder 11 into the heat dissipation groove 111. Since the first fixing member 21 and the second fixing member 22 can abut against the tool holder 11, the contact section 31 of the oscillating heat pipe 3 can also be indirectly abutted against the heat dissipation groove 111 to increase the stability of the direct contact between the oscillating heat pipe 3 and the tool holder 11.

[0035] In some embodiments of this disclosure, see Figure 3 and Figure 4 An abutment portion 261 is provided at the end of the support frame 26 away from the first fixing member 21 and the second fixing member 22. The shape of the abutment portion 261 is adapted to the shape of the inner ring of the heat dissipation section 32 of the oscillating heat pipe 3, so that it can abut against the inward direction of the heat dissipation section 32 when it abuts against the support frame 26. By providing the abutment portion 261 at the end of the support frame 26, the stability of the heat dissipation section 32 and the support frame 26 when they abut against each other can be increased. For example, if the inner ring of the heat dissipation section 32 is arc-shaped, the abutment portion 261 can also be arc-shaped, extending a certain distance on both sides of the end of the support frame 26 along the radial direction of the handle 11. This allows the abutment portion 261 to better support the heat dissipation section 32 when it abuts against the support frame 26, and to limit the radial tilt of the heat dissipation section 32 relative to the support frame 26, thereby further ensuring the stability of the oscillating heat pipe 3 on the first fixing member 21 and the second fixing member 22. Of course, in other embodiments, the support frame 26 may also be of other structures, depending on the actual situation, and this disclosure does not impose any restrictions on it.

[0036] In some embodiments of this disclosure, the diameter of the oscillating heat pipe 3 is 6.5-7.5 mm, the width is 8-12 mm, and the axial extension length along the shank 11 is 90-110 mm. The oscillating heat pipe 3 is pre-filled with coolant at a mass fraction of 30%-50%, and the oscillating heat pipe 3 is evacuated to a pressure of 4.5-5.5 Pa. The length and width of the oscillating heat pipe 3 can be determined according to the dimensions of the end mill shank 11 and the cutter head 12. The mass fraction of the pre-filled coolant and the pressure of the evacuated coolant can be determined according to the heat dissipation intensity required by the end mill when cutting materials. The above data are embodiments with high applicability of this disclosure. The specific data of the length and width of the oscillating heat pipe 3, the mass fraction of the pre-filled coolant, and the pressure of the evacuated coolant can be determined according to the actual situation, and this disclosure does not limit them.

[0037] In some embodiments of this disclosure, the end mill is used to process AFRP composite materials. AFRP composite materials are fiber-reinforced composite materials, which are prone to chip accumulation during cutting. Chip accumulation hinders the dissipation of cutting heat, causing the temperature in the cutting area to rise rapidly, which in turn leads to accelerated tool wear, edge chipping, and material damage. The end mill of this disclosure has good heat dissipation performance. Therefore, when cutting AFRP composite materials, the end mill can be cooled down quickly, avoiding the above-mentioned problems. It can also effectively extend the service life of the end mill and reduce surface delamination defects in the material, thereby improving the cutting effect.

[0038] This disclosure also relates to a method for cutting AFRP composite materials using the end mill described in the above embodiments, comprising the following steps: Before cutting, multiple oscillating heat pipes 3 are respectively attached and placed into the heat dissipation groove 111 of the knife handle 11, and then the oscillating heat pipes 3 are connected to the knife handle 11 by the fixing component 2. Install the assembled end mill onto the machine tool spindle. After checking that there is no interference with the oscillating heat pipe 3, start the spindle to run under no-load to allow the oscillating heat pipe 3 to adapt to the rotational speed environment. Taking carbon fiber reinforced epoxy resin matrix composite (AFRP) as an example, the plate thickness is 4mm, the fiber laying direction is [0° / 90°]s, the spindle speed is set to 4000-8000r / min, the feed rate is 10-50mm / min, and the cutting depth is 6mm; When the machine tool is started for milling, the oscillating heat pipe 3 continuously conducts and dissipates heat through phase change cycle during the cutting process, so as to keep the temperature of the cutting area at 180-220℃. Compared with the temperature of 450-550℃ in the cutting area during traditional end mill machining, it can effectively reduce the temperature of the cutting area. After milling to the preset size, turn off the machine tool spindle and wait for the end mill to cool to room temperature before disassembling and cleaning. Check the condition of the oscillating heat pipe 3 and the fixed component 2 to ensure reliability for the next use.

[0039] By using the end mill disclosed herein, the surface roughness of the workpiece can be effectively reduced to Ra=0.35μm when cutting AFRP composite materials, and there are no delamination or burning defects. After continuous machining, the wear of the cutter tip 12 is ≤0.02mm, which is 45% lower than that of traditional end mills, and can effectively extend the service life of the end mill.

[0040] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0041] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0042] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. An end mill, characterized in that, include: The blade body includes a handle and a blade head arranged along the axial direction. The outer wall of the handle is provided with heat dissipation grooves extending along the axial direction. Multiple heat dissipation grooves are provided and spaced apart along the circumference of the handle. An oscillating heat pipe includes a contact section and a heat dissipation section that communicate along the axial direction. The contact section is correspondingly fitted and embedded in the heat dissipation groove and extends along the heat dissipation groove toward the cutting head. The heat dissipation section protrudes outward from the contact section through a bend and is radially spaced from the cutting head. The oscillating heat pipes are multiple and spaced apart along the circumference, and the multiple heat dissipation sections extend along the axial direction and are fixedly connected to the tool holder by a fixing component.

2. The end mill according to claim 1, characterized in that, A stepped portion is formed between the handle and the blade head, and the end of the heat dissipation groove near the blade head passes through the stepped portion so that the end face of the contact section faces the blade head.

3. The end mill according to claim 1, characterized in that, The length of the handle is 90-110mm and the diameter is 15-25mm. The heat dissipation groove extends radially inward along the handle by 3-5mm and the groove width along the circumference of the handle is 8-12mm.

4. The end mill according to claim 1, characterized in that, The fixing component includes a first fixing member and a second fixing member, which are disposed opposite to each other and detachably fixedly connected to form a connecting hole for cooperating with the knife handle between the first fixing member and the second fixing member, and an anti-slip pad is provided in the connecting hole.

5. The end mill according to claim 4, characterized in that, The first fixing member and the second fixing member include a semi-circular mating part and a connecting part. The inner ring of the mating part is used to abut against the knife handle, and the connecting part is used to fix the first fixing member and the second fixing member together and to abut against the knife handle. The connecting part includes connecting plates disposed at both radial ends of the mating part. The connecting plates are provided with fastening holes for engaging with fasteners to fix the two connecting plates disposed opposite to each other on the first fixing member and the second fixing member.

6. The end mill according to claim 4, characterized in that, The first and second fixing members are provided with weight-reducing grooves, and the weight-reducing grooves and the oscillating heat pipes on the first and second fixing members are symmetrically arranged.

7. The end mill according to claim 4, characterized in that, The first and second fixing members have multiple support frames protruding from the top surface along the axial direction. The oscillating heat pipe is annular. The inner ring of the heat dissipation section abuts against the support frame. The contact section passes through the first or second fixing member and extends along the first direction.

8. The end mill according to claim 7, characterized in that, The support frame has an abutment portion at the end away from the first and second fixing members. The abutment portion is adapted to the shape of the inner ring of the heat dissipation section and abuts against the inner ring of the heat dissipation section.

9. The end mill according to claim 1, characterized in that, The oscillating heat pipe has a diameter of 6.5-7.5 mm, a width of 8-12 mm, and an axial extension length of 90-110 mm. The oscillating heat pipe is pre-filled with coolant of 30%-50% by mass, and the oscillating heat pipe is evacuated to a pressure of 4.5-5.5 Pa.

10. The end mill according to claim 1, characterized in that, The end mill is used to machine AFRP composite materials.

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