Cutting machine tool and oil mist cooling device
By designing an oil mist cooling device, the compressed gas and oil mist are mixed and supplied from the tool, the problem of difficulty in entering the cutting area of existing machine tool coolant is solved, efficient lubrication and cooling is achieved, production costs are reduced and workpiece surface quality is improved.
Patent Information
- Application Number
- CN202311730308.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-15
- Publication Date
- 2025-06-17
AI Technical Summary
When existing machine tools cut metal, external spray coolant is difficult to fully enter the cutting area, resulting in poor cooling effect. At the same time, central cooling requires a large amount of cutting fluid, which increases production costs and causes potential harm to the environment and the human body.
An oil mist cooling device is designed to achieve micro lubrication and cooling by mixing compressed gas and oil mist, and then supplying the tool to the contact part of the tool and the workpiece. The device includes a first channel and a second channel, both outlets joining to the cooling channel, ensuring that the mixture can effectively flow into the cooling zone.
The tool of the high-speed heavy-duty electric spindle is provided with a mixture of compressed gas and oil mist to the tool through central cooling, which reduces the bond between the workpiece chips and the tool, improves the surface quality of the workpiece, reduces production costs, and ensures cooling and lubrication effects.
Smart Images
Figure CN120155798A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of machine tools, and particularly to an oil mist cooling device. It also relates to a cutting machine tool including the aforementioned oil mist cooling device. Background Art
[0002] When a machine tool cuts metal, it is necessary to lubricate and cool the tool and the workpiece. Currently, the methods of cooling the tool mainly include external cooling and central cooling.
[0003] Due to the high rotational speed of the motorized spindle and the fast cutting speed of the machine tool, the contact time between the cutting edge and the workpiece is extremely short, so that the cutting fluid sprayed externally cannot all enter the cutting area, affecting the performance of the coolant function. In contrast, central cooling sprays the cutting fluid from the central part onto the workpiece and the tool by means of central water outlet, but it requires a large amount of cutting fluid, which not only increases the production cost, but also poses a great potential hazard to the environment and the human body, and the lubrication effect on the tool and the workpiece is average. Summary of the Invention
[0004] The purpose of this application is to provide an oil mist cooling device that can mix compressed gas and oil mist and supply them to the contact part of the tool and the workpiece from the tool to achieve micro-lubrication of the tool and the workpiece. Another purpose of this application is to provide a cutting machine tool including the aforementioned oil mist cooling device.
[0005] To achieve the above purpose, this application provides an oil mist cooling device, which includes a first channel, a second channel and a cooling channel; both the first channel and the second channel include an inlet, a front channel, a rear channel and an outlet connected in sequence; the rear channel of the first channel is arranged inside the rear channel of the second channel; the inlet of the first channel is provided with a first joint for the inflow of compressed gas and oil mist, and the inlet of the second channel is provided with a second joint for the inflow of compressed gas; the outlets of the first channel and the second channel converge at the cooling channel, and the distance between the outlet of the second channel and the inlet of the cooling channel is not less than the distance between the outlet of the first channel and the inlet of the cooling channel.
[0006] In some embodiments, both the first channel and the second channel are arranged inside a fixed component, and the cooling channel is arranged inside a rotating component; the rotating component rotates around the fixed component; a labyrinth seal is provided at the contact part between the rotating component and the fixed component.
[0007] In some embodiments, the distance between the outlet of the second channel and the cooling channel is greater than the distance between the outlet of the first channel and the cooling channel.
[0008] In some embodiments, the fixing component includes an oil filling nozzle, an oil filling disc, a cylinder, and a conduit; an oil filling disc hole is provided in the oil filling disc, and the conduit is inserted into the oil filling disc hole; the front channel of the first channel is provided in the oil filling nozzle, and the lumen of the conduit defines the rear channel of the first channel; the front channel of the second channel is provided in the cylinder, and the gap between the oil filling disc hole and the conduit defines the rear channel of the second channel.
[0009] In some embodiments, the oil filling disc hole includes a central hole and a plurality of side holes annularly distributed around the central hole; any side hole is crescent-shaped, and the inner curved edge of any side hole coincides with a part of the hole edge of the central hole; the adjacent ends of any two adjacent side holes define an edge, and all the edges surround the conduit and squeeze and position the conduit.
[0010] In some embodiments, the rotating component includes a pull rod and a pull rod nut; the end of the conduit extends out of the oil filling disc, the pull rod nut is rotatably sleeved on the end of the oil filling disc and the conduit, and the pull rod nut and the oil filling disc are connected with a gap; a part of the pull rod nut is inserted into the cooling channel, and the pull rod nut and the pull rod are hermetically fixed.
[0011] In some embodiments, the rotating component further includes a locking nut, and the fixing component further includes a sealing ring; a part of the locking nut surrounds the outer periphery of the pull rod nut, and a part of the locking nut surrounds the outer periphery of the pull rod. The locking nut, the pull rod nut, and the pull rod are relatively fixed; the pull rod and the fixing component are respectively in two spaces separated by the sealing ring; the sealing ring is relatively fixed to the fixing component, and the labyrinth sealing part includes a first tooth provided on the sealing ring and a second tooth provided on the locking nut, and the first tooth and the second tooth are engaged with each other.
[0012] In some embodiments, the oil filling disc includes a chassis and an extension pipe connected coaxially; the conduit is specifically a copper pipe, and a copper ring is provided between the pull rod nut and the extension pipe.
[0013] In some embodiments, the chassis is embedded in the cylinder, and the extension pipe penetrates through the cylinder; a sealing ring is provided between at least one of the chassis and the extension pipe and the cylinder.
[0014] This application also provides a cutting machine tool, including a tool pull claw for clamping a tool and the above-mentioned oil mist cooling device; the tool includes a tool head, a tool hole is provided in the tool, and the tool hole penetrates through the tool head; a pull claw hole is provided in the tool pull claw; the cooling channel, the pull claw hole, and the tool hole are communicated in sequence.
[0015] Compared with the above background art, the oil mist cooling device provided by the present application includes a first channel, a second channel, and a cooling channel; both the first channel and the second channel include an inlet, a front channel, a rear channel, and an outlet that are connected in sequence; the rear channel of the first channel is disposed inside the rear channel of the second channel; the inlet of the first channel is provided with a first connector for the inflow of compressed gas and oil mist, and the inlet of the second channel is provided with a second connector for the inflow of compressed gas; the outlets of the first channel and the second channel converge at the cooling channel, and the distance between the outlet of the second channel and the inlet of the cooling channel is not less than the distance between the outlet of the first channel and the inlet of the cooling channel.
[0016] The oil mist cooling device provided by the present application can be used as a cooling device for a center oil mist electric spindle tool with tail side liquid supply.
[0017] The oil mist cooling device provided by the present application can supply a mixture of compressed gas and oil mist to the tool clamped on a high-speed heavy-duty electric spindle in a central cooling manner. This mixture is at the contact part between the tool and the workpiece, which can reduce the adhesion between the workpiece chips and the tool, improve the surface quality of the workpiece, and reduce the production cost on the basis of ensuring the cooling and lubrication effects. Description of the Drawings
[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings.
[0019] Figure 1 It is a schematic structural diagram of the oil mist cooling device provided by the embodiment of the present application;
[0020] Figure 2 It is a partial structural diagram of the oil mist cooling device provided by the embodiment of the present application at the fixed component and the rotating component;
[0021] Figure 3 It is Figure 2 a partial enlarged view of part A in
[0022] Figure 4 It is Figure 2 a partial enlarged view of part B in
[0023] Figure 5 It is a schematic structural diagram of the first channel and the second channel provided by the embodiment of the present application.
[0024] Among them, 1 - the first channel, 2 - the second channel, 3 - the cooling channel, 4 - the first joint, 5 - the second joint, 6 - the labyrinth seal, 71 - the grease nipple, 72 - the grease tray, 721 - the grease tray hole, 7211 - the central hole, 7212 - the side hole, 722 - the edge, 723 - the chassis, 724 - the extension pipe, 73 - the cylinder, 74 - the conduit, 75 - the sealing ring, 81 - the pull rod, 82 - the pull rod nut, 83 - the lock nut, 84 - the shaft core, 9 - the copper ring, 10 - the sealing ring. Detailed implementation manners
[0025] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.
[0026] In order to enable those skilled in the art in the technical field to better understand the solution of the present application, the present application will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners.
[0027] Please refer to Figures 1 to 5 , Figure 1 , which is a schematic structural diagram of the oil mist cooling device provided by the embodiment of the present application; Figure 2 , which is a partial structural diagram of the oil mist cooling device provided by the embodiment of the present application at the fixed component and the rotating component; Figure 3 is Figure 2 a partial enlarged view of part A in
[0028] Figure 4 is Figure 2 a partial enlarged view of part B in Figure 5 , which is a schematic structural diagram of the first channel and the second channel provided by the embodiment of the present application.
[0029] Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 5 , the present application provides an oil mist cooling device, including a first channel 1, a second channel 2 and a cooling channel 3; in this embodiment, any one of the first channel 1 and the second channel 2 includes an inlet, a front channel, a rear channel and an outlet connected in sequence, wherein the rear channel of the first channel 1 is arranged in the rear channel of the second channel 2, and the outlet of the first channel 1 and the outlet of the second channel 2 converge at the cooling channel 3.
[0030] In this embodiment, a first joint 4 through which compressed gas and oil mist can flow is provided at the inlet of the first channel 1, and a second joint 5 through which compressed gas can flow is provided at the inlet of the second channel 2. It can be seen that the first channel 1 can introduce a mixture of compressed gas and oil mist into the oil mist cooling device, and the second channel 2 can introduce compressed gas into the oil mist cooling device.
[0031] In this embodiment, the outlets of the first channel 1 and the second channel 2 converge at the cooling channel 3. The distance between the outlet of the second channel 2 and the inlet of the cooling channel 3 is not less than the distance between the outlet of the first channel 1 and the inlet of the cooling channel 3. It can be seen that the compressed gas in the second channel 2 can flow out first from the outlet of the second channel 2, and the aforementioned compressed gas can surround the periphery of the first channel 1. On the one hand, the compressed gas flowing out from the outlet of the second channel 2 can guide and restrict the flow direction of the mixture in the first channel 1, so that the mixture flowing out from the outlet of the first channel 1 can flow into the cooling channel 3 as completely as possible. In other words, it can prevent the mixture flowing out from the outlet of the first channel 1 from leaking into the assembly gaps of various components of the oil mist cooling device. On the other hand, the mixture in the first channel 1 and the compressed gas in the second channel 2 can be mixed in the cooling channel 3, further increasing the amount of compressed gas mixed with the oil mist, improving the mixing degree of the oil mist and the compressed gas, and reducing the consumption of lubricating oil.
[0032] The oil mist cooling device provided by the present application can be used as a cooling device for a center oil mist electric spindle tool with tail side liquid supply, and can provide cooling for a workpiece clamped on a high-speed heavy-duty electric spindle, achieve micro-lubrication for the aforementioned workpiece, form a lubricating film on the surface of the tool to reduce friction, reduce the adhesion between the chip and the tool, improve the surface quality of the workpiece, and reduce production costs on the basis of ensuring the cooling and lubrication effects.
[0033] The following further describes the oil mist cooling device provided by the present application in conjunction with the drawings and embodiments.
[0034] Please refer to Figure 2 , in some embodiments, both the first channel 1 and the second channel 2 can be arranged in the fixed component, and the cooling channel 3 can be arranged in the rotating component; a labyrinth seal 6 is provided at the contact part between the aforementioned rotating component and the aforementioned fixed component, which can reduce the leakage risk of oil mist and compressed gas at the assembly gap between the rotating component and the fixed component.
[0035] In the above embodiment, the distance between the outlet of the second channel 2 and the cooling channel 3 can be greater than the distance between the outlet of the first channel 1 and the cooling channel 3, so that the compressed gas in the second channel 2 can better guide the compressed gas and oil mist in the first channel 1 to flow towards the cooling channel 3.
[0036] In addition, in the above embodiments, both the first joint 4 and the second joint 5 can be set as L-shaped quick-connect pipe joints.
[0037] Reference can be made to Figure 2 、 Figure 3 and Figure 5 , in some embodiments, the fixing assembly of the oil mist cooling device may include an oil injection nozzle 71, an oil injection disc 72, a cylinder, and a conduit 74; wherein, an oil injection disc hole 721 is provided in the oil injection disc 72, and the conduit 74 is inserted into the oil injection disc hole 721; the front channel of the first channel 1 is provided in the oil injection nozzle 71, and the lumen of the conduit 74 defines the rear channel of the first channel 1; the front channel of the second channel 2 is provided in the cylinder, and the gap between the oil injection disc hole 721 and the conduit 74 defines the rear channel of the second channel 2. Since the conduit 74 is inserted into the oil injection disc hole 721 of the oil injection disc 72, obviously, the lumen of the conduit 74 is located within the gap between the oil injection disc hole 721 and the conduit 74, realizing that the rear channel of the first channel 1 is provided within the rear channel of the second channel 2.
[0038] In the above embodiments, the fixing assembly may include an oil injection disc 72, and an oil injection disc hole 721 is provided in the oil injection disc 72. The oil injection disc hole 721 may include a central hole 7211 and a plurality of side holes 7212. The aforementioned side holes 7212 are distributed around the central hole 7211. Any one of the side holes 7212 is crescent-shaped, and the inner curved edge of any one of the side holes 7212 coincides with a part of the hole edge of the central hole 7211; the adjacent ends of any two adjacent side holes 7212 define an edge 722, and all the edges 722 surround the conduit 74 and squeeze and position the conduit 74. It can be seen that in this embodiment, all the side holes 7212 can squeeze and position the conduit 74 through the edges 722, which simplifies the clamping difficulty of the conduit 74 in the oil injection disc hole 721.
[0039] Reference can be made to Figures 2 to 4 , in some embodiments, the rotating assembly may include a pull rod 81 and a pull rod nut 82; the conduit 74 is inserted into the oil injection disc hole 721 of the oil injection disc 72, and the end of the conduit 74 extends out of the oil injection disc 72; the pull rod nut 82 is rotatably sleeved on the oil injection disc 72 and the end of the conduit 74, and there is a clearance connection between the pull rod nut 82 and the oil injection disc 72 to ensure the relative rotation characteristics of the pull rod nut 82 and the oil injection disc 72; a part of the pull rod nut 82 is inserted into the cooling channel 3, and the pull rod nut 82 and the pull rod 81 are fixedly connected and sealed with each other to ensure the tightness of the cooling channel 3 within the rotating assembly.
[0040] Taking the oil mist cooling device as an example of the cooling device for the center oil mist electric spindle tool with lateral liquid supply at the tail. During the cutting of the electric spindle, the drawbar 81 and the drawbar nut 82 can rotate at high speed together with the rotor shaft of the electric spindle. The compressed gas in the second channel 2 flows out of the outlet of the second channel 2 at high speed and flows into the cooling channel 3 in the drawbar 81. It can not only restrict the flow direction of the compressed gas and oil mist in the first channel 1, but also reduce the air pressure in the drawbar 81, so that the compressed gas and oil mist in the first channel 1 can flow into the cooling channel 3 in the drawbar 81 faster and better. The compressed gas and oil mist entering the cooling channel 3 can be diffused to the workpiece surface through the hollow tool, forming micro-lubrication for the workpiece and cooling the workpiece.
[0041] On the basis of the above embodiment, the rotating assembly further includes a locking nut 83, and the fixing assembly further includes a sealing ring 75; the locking nut 83 can be sleeved on both the drawbar nut 82 and the drawbar 81. For example, the locking nut 83 is sleeved at the connection between the drawbar nut 82 and the drawbar 81. At the same time, the locking nut 83, the drawbar nut 82 and the drawbar 81 are relatively fixed; the drawbar 81 and the fixing assembly are respectively in two spaces separated by the sealing ring 75; the sealing ring 75 is relatively fixed to the fixing assembly. The labyrinth seal part 6 includes a first tooth provided on the sealing ring 75 and a second tooth provided on the locking nut 83, and the first tooth and the second tooth are engaged with each other.
[0042] In the above embodiment, the locking nut 83 is sleeved at the connection between the drawbar nut 82 and the drawbar 81. Therefore, part of the locking nut 83 surrounds the outer periphery of the drawbar nut 82, and part of the locking nut 83 surrounds the outer periphery of the drawbar 81. Usually, there can be a clearance fit between the locking nut 83 and the drawbar nut 82; a shaft core 84 can be provided between the locking nut 83 and the drawbar 81, and the locking nut 83 and the drawbar 81 are fixedly connected through the shaft core 84. That is to say, the locking nut 83, the shaft core 84 and the drawbar 81 are sleeved and fixedly connected in sequence from the outside to the inside.
[0043] In the above embodiment, the first tooth of the sealing ring 75 and the second tooth of the locking nut 83 are cross-assembled to form a labyrinth, which can prevent the compressed gas and oil mist from leaking from between the sealing ring 75 and the locking nut 83 to the rest of the oil mist cooling device, and can also prevent the dust in the oil mist cooling device from entering the first channel 1, the second channel 2 and the cooling channel 3.
[0044] For reference Figure 2 and Figure 3 , in some embodiments, the oil injection disc 72 of the fixing assembly may include a chassis 723 and an extension tube 724; the chassis 723 and the extension tube 724 are coaxially connected, and the conduit 74 is specifically a copper tube; a copper ring 9 is provided between the drawbar nut 82 and the extension tube 724. The copper tube and the copper ring 9 are beneficial to improving the movement performance of the rotating assembly relative to the fixing assembly.
[0045] In the above embodiments, the chassis 723 is embedded in the cylinder 73, and the extension pipe 724 penetrates through the cylinder 73; a sealing ring 10 is provided between at least one of the chassis 723 and the extension pipe 724 and the cylinder 73. Generally, a plurality of sealing rings 10 are provided between the chassis 723 and the cylinder 73, and between the extension pipe 724 and the cylinder 73 in this oil mist cooling device.
[0046] Please refer to Figure 1 and Figure 2 , this application also provides a cutting machine tool, including a tool chuck and the oil mist cooling device provided in each of the above embodiments; the tool chuck is connected to the oil mist cooling device and is used for clamping the tool; the oil mist cooling device can provide a mixture of compressed gas and oil mist to the tool through the tool chuck.
[0047] In this embodiment, the tool includes a tool head, a tool hole is provided in the tool, the tool hole penetrates through the tool head, a chuck hole is provided in the tool chuck, the cooling channel 3, the aforementioned chuck hole and the aforementioned tool hole are sequentially connected, and the compressed gas and oil mist in the first channel 1 and the compressed gas in the second channel 2 can converge in the cooling channel 3 and then flow out of the tool along the cooling channel 3, the chuck hole and the tool hole, so as to lubricate and cool the contact part between the tool and the workpiece, reduce the friction between the tool and the workpiece, reduce the cutting heat, and improve the cutting flow.
[0048] In the above embodiments, the oil mist cooling device includes a first channel 1 and a second channel 2. The first channel 1 can be connected to a first gas source and an oil supply device. The oil supply device supplies lubricating oil to the first channel 1, and the first gas source supplies a first compressed gas into the first channel 1 and uses the first compressed gas to vaporize the aforementioned lubricating oil; the second channel 2 can be connected to a second gas source, and the second gas source supplies a second compressed gas into the second channel 2.
[0049] The above has introduced in detail the cutting machine tool and the oil mist cooling device provided in this application. Specific examples are used in this article to elaborate on the principle and implementation manner of this application. The description of the above embodiments is only used to help understand the method and its core idea of this application. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of this application, several improvements and modifications can still be made to this application, and these improvements and modifications also fall within the protection scope of the claims of this application.
Claims
1. An oil mist cooling device, characterized in that, It includes a first channel (1), a second channel (2) and a cooling channel (3); both the first channel (1) and the second channel (2) include an inlet, a front channel, a rear channel and an outlet connected in sequence; the rear channel of the first channel (1) is arranged in the rear channel of the second channel (2); the inlet of the first channel (1) is provided with a first joint (4) for compressed gas and oil mist to flow in, and the inlet of the second channel (2) is provided with a second joint (5) for compressed gas to flow in; the outlets of the first channel (1) and the second channel (2) converge at the cooling channel (3), and the distance between the outlet of the second channel (2) and the inlet of the cooling channel (3) is not less than the distance between the outlet of the first channel (1) and the inlet of the cooling channel (3).
2. The oil mist cooling device according to claim 1, characterized in that, Both the first channel (1) and the second channel (2) are arranged in a fixed component, and the cooling channel (3) is arranged in a rotating component; the rotating component rotates around the fixed component; a labyrinth seal part (6) is arranged at the contact part between the rotating component and the fixed component.
3. The oil mist cooling device according to claim 2, characterized in that, The distance between the outlet of the second channel (2) and the cooling channel (3) is greater than the distance between the outlet of the first channel (1) and the cooling channel (3).
4. The oil mist cooling device according to claim 2, characterized in that, The fixed component includes an oil injection nozzle (71), an oil injection disc (72), a cylinder (73) and a conduit (74); an oil injection disc hole (721) is arranged in the oil injection disc (72), and the conduit (74) is inserted into the oil injection disc hole (721); the front channel of the first channel (1) is arranged in the oil injection nozzle (71), and the lumen of the conduit (74) defines the rear channel of the first channel (1); the front channel of the second channel (2) is arranged in the cylinder (73), and the gap between the oil injection disc hole (721) and the conduit (74) defines the rear channel of the second channel (2).
5. The oil mist cooling device according to claim 4, characterized in that, The oil injection disc hole (721) includes a central hole (7211) and a plurality of side holes (7212) annularly distributed around the central hole (7211); any one of the side holes (7212) is crescent-shaped, and the inner curved edge of any one of the side holes (7212) coincides with a part of the hole edge of the central hole (7211); the adjacent ends of any two adjacent side holes (7212) define an edge (722), and all the edges (722) surround the conduit (74) and squeeze and position the conduit (74).
6. The oil mist cooling device according to claim 4, characterized in that, The rotating component includes a pull rod (81) and a pull rod nut (82); the end of the conduit (74) extends out of the oil injection disc (72), the pull rod nut (82) is rotatably sleeved on the end of the oil injection disc (72) and the conduit (74), and the pull rod nut (82) and the oil injection disc (72) are connected with a gap; a part of the pull rod nut (82) is inserted into the cooling channel (3), and the pull rod nut (82) and the pull rod (81) are sealed and fixed.
7. The oil mist cooling device according to claim 6, characterized in that, The rotating assembly further includes a locking nut (83), and the fixed assembly further includes a sealing ring (75); part of the locking nut (83) surrounds the outer periphery of the pull rod nut (82), and part of the locking nut (83) surrounds the outer periphery of the pull rod (81), and the locking nut (83), the pull rod nut (82), and the pull rod (81) are relatively fixed to each other; the pull rod (81) and the fixed assembly are respectively located in two spaces separated by the sealing ring (75); the sealing ring (75) is relatively fixed to the fixed assembly, and the labyrinth seal portion (6) includes a first tooth provided on the sealing ring (75) and a second tooth provided on the locking nut (83), and the first tooth and the second tooth are engaged with each other.
8. The oil mist cooling device according to claim 7, characterized in that, The oil injection disc (72) includes a chassis (723) and an extension pipe (724) connected coaxially; the conduit (74) is specifically a copper pipe, and a copper ring (9) is provided between the pull rod nut (82) and the extension pipe (724).
9. The oil mist cooling device according to claim 8, characterized in that, The chassis (723) is embedded in the cylinder (73), and the extension pipe (724) penetrates through the cylinder (73); at least one of the chassis (723) and the extension pipe (724) is provided with a sealing ring (10) between it and the cylinder (73).
10. A cutting machine tool, characterized in that, It includes a cutting tool, a tool pull claw for clamping the cutting tool, and the oil mist cooling device according to any one of claims 1 to 9; the cutting tool includes a tool tip, a tool hole is provided in the cutting tool, and the tool hole penetrates through the tool tip; a pull claw hole is provided in the tool pull claw; the cooling channel (3), the pull claw hole, and the tool hole are communicated in sequence.