Heat pipe cutting tool

Abstract

The utility model discloses a heat pipe cutting tool which comprises a tool main body, a heat pipe, a buncher, a tool rear cover and a tool tail end cover, the tool main body, the tool rear cover and the tool tail end cover are sequentially connected, and chip flow guide grooves which are spliced together are formed in the surfaces of the tool main body, the tool rear cover and the tool tail end cover. A communicated cavity is formed in the cutter body, the cutter rear cover and the cutter tail end cover, the heat pipe is installed in the cavity through a buncher, a heat pipe evaporation section, a heat pipe heat insulation section and a heat pipe condensation section are sequentially formed, and the heat pipe evaporation section is located at the position, making contact with a workpiece to be machined, of the cutter during working. A gap is reserved between the heat pipe and the cavity, and the gap is filled with a heat dissipation material. The supernormal heat conduction capability of the heat pipe is utilized to dissipate part of heat concentrated in a tool bit area in the cutting process, so that the purposes of reducing the temperature of the tool bit, protecting a workpiece from being polluted, preventing the property change of the workpiece, assisting the flowing of cuttings and further facilitating the collection of the cuttings are achieved.

Description

Technical Field

[0001] The utility model relates to a cutting tool, in particular to a heat pipe cutting tool. Background Art

[0002] Cutting is an important forming process. During the cutting process, a large amount of cutting heat is generated between the tool and the workpiece to be processed. If the cutting heat cannot be dissipated in time, it will be concentrated in the cutting area, causing the tool to be overheated and reducing the tool life. At the same time, the workpiece will also be deformed or its properties will change due to heat. The generation of cutting heat is inevitable. How to accelerate the dissipation of cutting heat during cutting to avoid overheating in the cutting area is an important issue to ensure the quality of workpiece processing and the working life of the tool.

[0003] The traditional cooling method is to use cutting fluid to remove cutting heat during the cutting process, thereby reducing the temperature of the cutting area and helping chip removal, thereby extending the tool life and improving the surface quality of the workpiece. However, in some special processing areas, the workpiece may be contaminated by the cutting fluid, causing the properties of the workpiece to change.

[0004] Traditional gunpowder cutting is to process gunpowder manually using tools. In order to control the heat generated during cutting, the manual cutting speed is slow and the work efficiency is low. In order to speed up the work efficiency, the existing technology uses semi-automatic mechanized processing, but the traditional method of reducing the cutting temperature of the tool is not suitable for gunpowder cutting. Utility Model Content

[0005] The purpose of the utility model is to provide a heat pipe cutting tool to address the problems in the above-mentioned prior art, which utilizes the extraordinary thermal conductivity of the heat pipe to dissipate part of the heat concentrated in the tool head area during the cutting process, reduce the tool head temperature, protect the workpiece from contamination, prevent the workpiece from changing its properties, and assist the chip flow to facilitate chip collection.

[0006] In order to achieve the above purpose, the utility model has the following technical solutions:

[0007] A heat pipe cutting tool comprises a tool body, a heat pipe, a cluster, a tool rear cover and a tool end cover, wherein the tool body, the tool rear cover and the tool end cover are connected in sequence, and a chip flow guiding groove spliced ​​together is formed on the surface, and the tool body, the tool rear cover and the tool end cover are provided with a connected chamber inside, and the heat pipe is installed in the chamber through the cluster, and a heat pipe evaporation section, a heat pipe insulation section and a heat pipe condensation section are formed in sequence, and the heat pipe evaporation section is located at the part that contacts the workpiece to be processed when the tool is working; a gap is left between the heat pipe and the chamber, and the gap is filled with a heat dissipation material.

[0008] As a preferred solution, the heat pipe is composed of a metal tube shell, a capillary wick located on the inner wall of the metal tube shell, and a working medium capable of transferring heat energy.

[0009] As a preferred solution, the tool body, tool rear cover and tool end cover are assembled separately, and a bend is provided between the tool rear cover and the tool body so that the working fluid liquefied in the heat pipe condensation section returns to the heat pipe evaporation section by gravity.

[0010] As a preferred solution, a sealing rubber ring is provided at the connection between the tool rear cover and the tool body to prevent leakage of the heat dissipation material.

[0011] As a preferred solution, a heat sink is installed on the surface of the tool rear cover.

[0012] As a preferred solution, a clustering device is respectively provided inside the tool body and the tool rear cover.

[0013] As a preferred solution, the chip flow guiding groove is a flat groove, and a plurality of heat pipes are arranged side by side in the chamber, and the plurality of heat pipes are fixed together by a bundler.

[0014] As a preferred solution, when the tool body is working, the contact portion with the workpiece is in close contact with the top end of the evaporation section of the heat pipe.

[0015] As a preferred solution, the heat dissipation material is silicone grease, and surface contact heat transfer is achieved between the heat pipe and the chip flow guiding groove by filling the silicone grease.

[0016] As a preferred solution, the type and quantity of the heat pipes are selected and set according to the safe temperature range of the workpiece to be processed.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] The heat pipe cutting tool proposed in the utility model utilizes the extraordinary heat conduction capacity of the heat pipe so that the cutting heat generated during the cutting process will not be concentrated at the position of the cutter head and will be difficult to dissipate in time. Therefore, the temperature of the workpiece to be processed and the tool will not continue to rise. The utility model uses the heat pipe, a highly efficient heat-conducting element, to continuously transmit the heat of the cutter head to the outside world, which can strengthen the heat dissipation conditions of the cutter head, reduce the temperature, and make cutting safer. It is particularly suitable for cutting gunpowder or other heat-sensitive materials. At the same time, the tool body, the tool back cover and the tool end cover of the utility model are connected in sequence, and the surface forms a chip flow guide groove spliced ​​together. The formed chips will flow to the rear of the tool along the direction of the tool, which is convenient for collecting chips. Since the heat pipe does not require external flow medium and auxiliary equipment to enhance heat dissipation, it will not pollute the workpiece to be processed and the external environment. On the other hand, the cost of the heat pipe and the cost of making the heat pipe cutting tool of the utility model are relatively low, and the tool structure is simple, and there are no special requirements for its use process. It is easy to use in actual production and easier to promote. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic structural diagram of a heat pipe cutting tool provided with a heat sink in Embodiment 1 of the utility model;

[0020] Figure 2 A schematic diagram of the structure of a heat pipe cutting tool without a heat sink in Embodiment 2 of the utility model;

[0021] Figure 3 A schematic diagram of the three-dimensional structure of a heat pipe cutting tool provided with a heat sink in Embodiment 1 of the utility model;

[0022] In the attached figure: 1- tool body, 2- heat pipe, 3- buncher, 4- tool back cover, 5- tool end cover, 6- heat sink, A- heat pipe evaporation section, B- heat pipe insulation section, C- heat pipe condensation section. DETAILED DESCRIPTION

[0023] The utility model is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0024] See also Figure 1 and Figure 3, Embodiment 1 of the utility model is provided with a heat pipe cutting tool with a heat sink, and the structure includes a split tool body 1, a heat pipe 2, a cluster 3, a tool back cover 4, a tool end cover 5 and a heat sink 6. The heat pipe 2 is composed of a metal thin-walled tube shell, a capillary wick located on the inner wall of the metal thin-walled tube shell, and a working medium capable of transferring heat energy, forming a high vacuum closed system, which can be divided into a heat pipe evaporation section A, a heat pipe insulation section B and a heat pipe condensation section C connected in sequence along the axial direction of the heat pipe. The tool body 1, the tool back cover 4 and the tool end cover 5 are connected in sequence, and the surfaces form a chip flow guide groove spliced ​​together, and the tool body 1, the tool back cover 4 and the tool end cover 5 are provided with a connected chamber inside, and the heat pipe 2 is installed in the chamber through the cluster 3, and the chip flow guide groove extends from the tool tip to the end of the tool, and the chip flow guide groove is a flat groove. A plurality of heat pipes 2 are arranged side by side in the chamber, and the plurality of heat pipes 2 are fixed together by the cluster 3 to form a heat pipe collection. The flat groove is placed closest to the front cutting surface of the cutting head while ensuring that the cutting head has the strength to bear the load. The heat pipe evaporation section A is in close contact with the front cutting surface of the cutting head. Close contact means that the gap between the heat pipe 2 and the flat groove is filled with silicone grease so that there is sufficient and reliable surface contact heat transfer between the heat pipe evaporation section A and the flat groove. The heat pipe condensation section C is closely connected to the flat groove formed by the end of the cutting tool and the cutting tool rear cover 4, and a heat sink 6 is installed on the surface of the cutting tool rear cover 4. The cutting tool rear cover 4 is closely connected to the heat sink 6. The heat dissipated by the heat pipe condensation section C and the heat of the cutting tool body 1 can be transferred to the environment faster through the heat sink 6.

[0025] During the cutting process, the heat generated between the front end of the tool body 1 and the workpiece to be processed is transferred to the silicone grease through the tool body 1, and the silicone grease is conducted to the heat pipe evaporation section A. Because the silicone grease penetrates the inside of the tool to the heat pipe condensation section C, part of the heat of the tool can be directly transferred to the outside through the heat sink 6 next to the tool back cover 4. The working fluid in the heat pipe evaporation section A absorbs heat and boils. After the phase change, the high-pressure steam carrying heat passes through the middle heat pipe insulation section B to reach the heat pipe condensation section C. In the heat pipe condensation section C, the gas working fluid condenses into liquid and releases latent heat. This heat is dissipated to the surrounding environment through the heat sink 6. The liquid working fluid relies on the capillary suction and gravity of the liquid absorption core to flow back to the heat pipe evaporation section A, thereby completing a cycle of heat transfer. This cycle continues, and the heat generated by the tool body cutting is continuously transferred from the heat pipe evaporation section A to the heat pipe condensation section C for dissipation, effectively reducing the heat accumulation and temperature rise of the tool head and the workpiece. In this embodiment, the thermal response speed of the heat pipe 2 is close to the speed of sound, and the thermal conductivity can be up to a thousand times that of an ordinary copper pipe. The heat dissipation by the heat pipe in this embodiment can greatly improve the cooling conditions of the integral cutting tool.

[0026] See also Figure 2In another embodiment of the utility model, a heat pipe cutting tool without a heat sink comprises a split tool body 1, a heat pipe 2, a cluster 3, a tool back cover 4 and a tool end cover 5. The heat pipe 2 is composed of a metal thin-walled tube shell, a capillary wick located on the inner wall of the metal thin-walled tube shell and a working medium capable of transferring heat energy, forming a high vacuum closed system, which can be divided into a heat pipe evaporation section A, a heat pipe insulation section B and a heat pipe condensation section C connected in sequence along the axial direction of the heat pipe. The tool body 1, the tool back cover 4 and the tool end cover 5 are connected in sequence, and a chip flow guide groove spliced ​​together is formed on the surface, and a connected chamber is opened inside the tool body 1, the tool back cover 4 and the tool end cover 5, and the heat pipe 2 is installed in the chamber through the cluster 3, and the chip flow guide groove extends from the tool tip to the end of the tool, and the chip flow guide groove is a flat groove. A plurality of heat pipes 2 are arranged side by side in the chamber, and the plurality of heat pipes 2 are fixed together by the cluster 3 to form a heat pipe collection. The flat groove is made closest to the front cutting surface of the cutting head while ensuring that the cutting head has the strength to bear the load. The heat pipe evaporation section A is in close contact with the front cutting surface of the cutting head. Close contact means that the gap between the heat pipe 2 and the flat groove is filled with silicone grease so that there is sufficient and reliable surface contact heat transfer between the heat pipe evaporation section A and the flat groove. The heat pipe condensation section C is closely connected to the flat groove formed by the end of the tool and the tool rear cover 4. The heat sink 6 is not installed on the surface of the tool rear cover 4. This structure can make the tool more flexible as a whole, and the adaptability of the working environment is stronger than that of Example 1. The tool is not easy to touch the non-processing area, but the heat dissipation efficiency is lower than that of Example 1.

[0027] During the cutting process, the heat generated between the front end of the tool body 1 and the workpiece to be processed is transferred to the silicone grease through the tool body 1, and the silicone grease is conducted to the heat pipe evaporation section A. Because the silicone grease penetrates the inside of the tool to the heat pipe condensation section C. The working fluid in the heat pipe evaporation section A absorbs heat and boils. After the phase change, the high-pressure steam carrying heat passes through the middle heat pipe insulation section B to reach the heat pipe condensation section C. In the heat pipe condensation section C, the gas working fluid condenses into liquid and releases latent heat. This heat dissipates into the surrounding environment, and the liquid working fluid relies on the capillary suction and gravity of the liquid absorption core to flow back to the heat pipe evaporation section A, thus completing a cycle of heat transfer. This cycle continues, and the heat generated by the tool body cutting is continuously transferred from the heat pipe evaporation section A to the heat pipe condensation section C for dissipation, effectively reducing the heat accumulation and temperature rise of the tool head and the workpiece. Silicone grease also has a bonding effect, which makes the heat pipe assembly and the tool body tightly connected together. In this embodiment, the thermal response speed of the heat pipe is close to the speed of sound, and the thermal conductivity coefficient can be up to a thousand times that of ordinary copper pipes. The application of heat pipe heat dissipation in this embodiment can greatly improve the cooling conditions of the split cutting tool.

[0028] In a possible implementation, the tool body 1, the tool rear cover 4 and the tool end cover 5 of the utility model are assembled in a split manner, which is convenient for processing and production. Since the tool rear cover 4 and the tool body 1 are designed in a split manner, it is more convenient to set the functions that need to be added later, and only the tool rear cover 4 needs to be redesigned.

[0029] In a possible implementation manner, a bend is provided between the tool rear cover 4 and the tool body 1 of the utility model, so that the working fluid liquefied in the heat pipe condensation section C can return to the heat pipe evaporation section A by gravity.

[0030] In a possible implementation manner, the height of the chip flow guiding groove of the utility model is 1.2 to 2 times the diameter of the heat pipe.

[0031] In a possible implementation, the utility model is provided with a sealing rubber ring for preventing silicone grease leakage at the connection between the tool rear cover 4 and the tool body 1. A clustering device 3 is respectively provided inside the tool body 1 and the tool rear cover 4, and the heat pipe 2 provided inside the tool body 1 and the tool rear cover 4 is reinforced and fixed by multiple clustering devices 3.

[0032] The heat pipe cutting tool of the utility model can be installed on a manipulator to work. In order to increase the cooling effect, the heat pipe cutting tool places multiple heat pipes and a cluster, which will reduce the strength. At this time, the workpiece is the object of protection and the tool is a consumable. In the above embodiments, the type and number of heat pipes 2 are selected and set according to the safe temperature range of the workpiece to be processed.

[0033] The utility model utilizes the extraordinary heat conduction capacity of the heat pipe to dissipate part of the heat concentrated in the cutter head area during the cutting process, so as to reduce the temperature of the cutter head and protect the workpiece from being contaminated, so that the workpiece does not change in properties, and assists the flow of chips, thereby facilitating chip collection.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to impose any limitation on the technical solution of the present invention. Those skilled in the art should understand that, without departing from the spirit and principles of the present invention, the present technical solution can also be subjected to a number of simple modifications and replacements, and these modifications and replacements also fall within the scope of protection covered by the claims of the present invention.

Claims

1. A heat pipe cutting tool, Features: The invention comprises a tool body (1), a heat pipe (2), a clustering device (3), a tool rear cover (4) and a tool end cover (5); the tool body (1), the tool rear cover (4) and the tool end cover (5) are connected in sequence, and the surfaces of the tool body (1), the tool rear cover (4) and the tool end cover (5) are spliced ​​together to form chip flow guiding grooves; the tool body (1), the tool rear cover (4) and the tool end cover (5) are provided with interconnected chambers inside; the heat pipe (2) is installed in the chamber through the clustering device (3), and a heat pipe evaporation section, a heat pipe insulation section and a heat pipe condensation section are formed in sequence; the heat pipe evaporation section is located at a position where the tool contacts a workpiece to be processed when the tool is working; a gap is left between the heat pipe (2) and the chamber, and the gap is filled with a heat dissipation material.

2. The heat pipe cutting tool according to claim 1, Features: The heat pipe (2) is composed of a metal tube shell, a capillary wick located on the inner wall of the metal tube shell, and a working medium capable of transferring heat energy.

3. The heat pipe cutting tool according to claim 2, Features: The tool body (1), the tool rear cover (4) and the tool end cover (5) are assembled in a split manner, and a bend is provided between the tool rear cover (4) and the tool body (1) so that the working fluid liquefied in the heat pipe condensation section can return to the heat pipe evaporation section by gravity.

4. The heat pipe cutting tool according to claim 3, Features: A sealing rubber ring is provided at the connection between the tool rear cover (4) and the tool body (1) to prevent leakage of the heat dissipation material.

5. The heat pipe cutting tool according to claim 1, Features: A heat sink (6) is installed on the surface of the tool rear cover (4).

6. The heat pipe cutting tool according to claim 1, Features: A clustering device (3) is respectively arranged inside the tool body (1) and the tool rear cover (4).

7. The heat pipe cutting tool according to claim 6, Features: The chip flow guiding groove is a flat groove, and a plurality of heat pipes (2) are arranged side by side in the chamber, and the plurality of heat pipes (2) are fixed together by a bundler (3).

8. The heat pipe cutting tool according to claim 1, Features: When the tool body (1) is in operation, the portion in contact with the workpiece is in close contact with the top end of the evaporation section of the heat pipe.

9. The heat pipe cutting tool according to claim 8, Features: The heat dissipation material is silicone grease, and surface contact heat transfer is achieved between the heat pipe (2) and the chip flow guiding groove by filling the silicone grease.

10. The heat pipe cutting tool according to claim 1, Features: The type and quantity of the heat pipes (2) are selected and set according to the safe temperature range of the workpiece to be processed.

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