Cutting tool and numerical control cutting machining system

Abstract

The utility model discloses a cutting tool and numerical control cutting machining system equipment, a tool cooling and chip removing channel is arranged in the cutting tool, the tool cooling and chip removing channel is an airflow conveying channel which is preset in the cutting tool, and an exhaust port of the airflow conveying channel is located on the outer surface of a cutting tool body; when in use, the cooling device is mounted in numerical control cutting processing equipment, the numerical control cutting processing equipment comprises a main shaft, a main shaft feeding mechanism and a cooling gas supply system, and the cooling gas supply system comprises a pressurized gas output unit, a gas cooling unit and a cooling gas conveying control unit. An outlet of the cooling gas conveying control unit is connected with a corresponding interface on the main shaft; a cooling gas conveying flow channel which can be continuously conducted is arranged in the main shaft, an inlet of the cooling gas conveying flow channel is connected with an outlet of the gas conveying control unit through the connector, and an outlet of the cooling gas conveying flow channel penetrates through the cutter handle to be communicated with a cutter cooling and chip removing channel in the cutting cutter.

Description

Technical Field

[0001] The utility model relates to a cutting tool and a numerical control cutting processing system. Background Art

[0002] Existing CNC cutting systems typically cool the cutting tool and flush the chips by injecting coolant or high-pressure air into the cutting tool during operation. Although liquid cooling (i.e., injecting coolant into the cutting tool during operation) has a good cooling effect, it has problems such as complex coolant recovery and processing. In addition, some cutting objects are not suitable for contact with liquids. For example, when the cutting object is a wooden material or a printed circuit board, the use of coolant will affect the performance of such cutting objects. Therefore, gas cooling (i.e., injecting high-pressure air into the cutting tool during operation) is sometimes used. Regardless of whether liquid cooling or gas cooling is used, the coolant or high-pressure airflow is always supplied from the outside of the cutting tool, and it is impossible to cool the spindle at the same time. Utility Model Content

[0003] The present invention aims to provide a CNC cutting system that solves the technical problem of using gas cooling, where high-pressure airflow is supplied from the outside of the cutting tool and the spindle cannot be cooled simultaneously. The present invention also aims to provide a cutting tool designed for use in the CNC cutting system of the first aspect described above.

[0004] The first aspect is a CNC cutting processing system, comprising: a spindle for mounting a cutting tool and driving the cutting tool to rotate around the central axis of a tool holder on which the cutting tool is mounted when the CNC cutting processing system is working; a spindle feeding mechanism for mounting the spindle and driving the spindle to perform feeding movement in a set manner when the CNC cutting processing system is working; and a cooling gas supply system, the cooling gas supply system comprising a pressurized gas output unit, a gas cooling unit and a cooling gas delivery control unit, the outlet of the cooling gas delivery control unit being connected to a corresponding interface on the spindle; wherein a continuously conductive cooling gas delivery channel is provided in the spindle, the inlet of the cooling gas delivery channel being connected to the outlet of the gas delivery control unit through the interface, the outlet of the cooling gas delivery channel passing through the tool holder and communicating with a tool cooling and chip removal channel in the cutting tool; the tool cooling and chip removal channel is an air flow delivery channel preset in the cutting tool and the exhaust port is located on the outer surface of the cutting tool.

[0005] The second aspect is a cutting tool, which is provided with a tool cooling and chip removal channel, and the tool cooling and chip removal channel is an air flow conveying channel preset in the cutting tool and the exhaust port is located on the outer surface of the cutting tool body; when in use, it is installed in a CNC cutting processing system, and the CNC cutting processing system includes: a spindle, which is used to install the cutting tool and drive the cutting tool to rotate around the central axis of the tool holder on which the cutting tool is installed when the CNC cutting processing system is working; a spindle feeding mechanism, which is used to install the spindle and drive the spindle to perform feeding movement in a set manner when the CNC cutting processing system is working; a cooling gas supply system, which includes a pressurized gas output unit, a gas cooling unit and a cooling gas delivery control unit, and the outlet of the cooling gas delivery control unit is connected to the corresponding interface on the spindle; a continuously conductive cooling gas delivery channel is provided in the spindle, and the inlet of the cooling gas delivery channel is connected to the outlet of the gas delivery control unit through the interface, and the outlet of the cooling gas delivery channel passes through the tool holder and is connected to the tool cooling and chip removal channel in the cutting tool.

[0006] The CNC cutting system provided by the present invention provides a continuously conductive cooling air delivery channel in the spindle, which can be connected to the tool cooling and chip removal channel preset in the cutting tool, thereby realizing the delivery of cooling air from the inside of the spindle to the cutting tool. Not only can it effectively cool the cutting tool, but it can also cool the spindle at the same time, thereby improving the overall cooling effect. In addition, since the cooling air is discharged from the inside of the cutting tool to the outside, it can better flush away the chips, thereby improving the processing accuracy and surface quality. The CNC cutting system can avoid the coolant recovery and processing problems of the liquid cooling method, and is suitable for cutting processing objects that are sensitive to liquids. At the same time, it overcomes the defect that the existing gas cooling method cannot cool the spindle at the same time.

[0007] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Additional aspects and advantages of the present invention will be partially given in the following description, partially become apparent from the following description, or be learned through practice. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] The drawings that constitute part of this specification are used to assist in understanding the present invention. The contents provided in the drawings and the related descriptions in this specification can be used to explain the present invention, but do not constitute an improper limitation on the present invention.

[0009] Figure 1 This is a schematic diagram of the overall mechanical structure of a CNC cutting processing system according to an embodiment of the present utility model.

[0010] Figure 2 for Figure 1 A partial enlarged view of the main axis.

[0011] Figure 3 for Figure 1 Cross-sectional view of the spindle section.

[0012] Figure 4 for Figure 3 A partial enlarged view of the main cooling air joint.

[0013] Figure 5 This is a schematic structural diagram of a cutting tool according to an embodiment of the utility model.

[0014] Figure 6 This is a schematic structural diagram of another cutting tool according to an embodiment of the utility model.

[0015] Figure 7 This is a schematic diagram of the overall structure of a CNC cutting processing system according to an embodiment of the present utility model.

[0016] Figure 1 The hollow arrows in the figure indicate the feed motion directions of the spindle feed mechanism in the X-axis, Y-axis and Z-axis.

[0017] Figure 3 The solid arrow in the figure indicates the anterior-posterior direction of the spindle.

[0018] The following are marked in the figure: spindle 1, spindle body 11, spindle motor 12, motor stator 121, motor rotor 122, shaft core 13, cooling air delivery channel 131, front bearing system 14, rear bearing system 15, tool holder locking and release mechanism 16, actuator 161, drive mechanism 162, cooling air connector 17, sleeve 171, sleeve rotation support bearing 172, sleeve rotation support bearing seat 173, air inlet connector 174, air inlet connector body 174a, outer sealing sleeve 174b, inner sealing sleeve 174c, air inlet connector Head front end cover 174d, T-shaped head air guide tube 174e, air distribution hole 174f, first axial compression spring 174g, pressure plate 174h, second axial compression spring 174i, wear-resistant sealing ring 174j, plug 174k, interface 18, heat dissipation cover 19, fan 191, spindle feed mechanism 2, cutting tool 3, tool cooling and chip removal channel 31, exhaust port 311, tool holder 4, cooling gas supply system 5, pressurized gas output unit 51, gas cooling unit 52, cooling gas delivery control unit 53, controller 6. DETAILED DESCRIPTION

[0019] The following is a clear and complete description of the present invention in conjunction with the accompanying drawings. A person skilled in the art will be able to implement the present invention based on these descriptions. Before describing the present invention in conjunction with the accompanying drawings, it should be noted that:

[0020] The technical solutions and technical features provided in each section, including the following description, may be combined with each other unless they conflict. In addition, where possible, these technical solutions, technical features, and related combinations may be assigned specific technical themes and protected by relevant patents.

[0021] The embodiments of the utility model involved in the following description are generally only a part of the embodiments rather than all the embodiments. Based on these embodiments, all other embodiments obtained by ordinary technicians in this field without making any creative work should fall within the scope of patent protection.

[0022] Regarding terms and units in this specification: The terms "include," "comprising," "having," and any variations thereof in this specification, the corresponding claims, and related sections are intended to cover non-exclusive inclusions. Other relevant terms and units are to be reasonably interpreted based on the relevant content provided in this specification.

[0023] Figure 1 This is a schematic diagram of the overall mechanical structure of a CNC cutting processing system according to an embodiment of the present utility model. Figure 2 for Figure 1 A partial enlarged view of the main axis. Figure 3 for Figure 1 Cross-sectional view of the spindle section. Figure 4 for Figure 3 A partial enlarged view of the main cooling air joint. Figure 7 This is a schematic diagram of the overall structure of a CNC cutting system according to an embodiment of the present utility model. Figures 1-4 、 Figure 7 As shown, a CNC cutting system includes: a spindle 1, a spindle feeding mechanism 2 and a cooling gas supply system 5; wherein the spindle 1 is used to install a cutting tool 3 and drive the cutting tool 3 to rotate around the central axis of a tool holder 4 on which the cutting tool 3 is installed when the CNC cutting system is in operation; the spindle feeding mechanism 2 is used to install the spindle 1 and drive the spindle 1 to perform feeding motion in a set manner when the CNC cutting system is in operation; the cooling gas supply system 5 includes a pressurized gas output unit 51, a gas cooling unit 52 and a cooling gas delivery control unit 53. The outlet 53 of the cooling gas delivery control unit is connected to the corresponding interface 18 on the spindle 1; wherein, a continuously conductive cooling gas delivery channel is provided in the spindle 1, and the inlet of the cooling gas delivery channel is connected to the outlet of the gas delivery control unit 53 through the interface 18, and the outlet of the cooling gas delivery channel passes through the tool holder 4 and is connected to the tool cooling and chip removal channel 31 in the cutting tool 3; the tool cooling and chip removal channel 31 is an air flow delivery channel preset in the cutting tool 3 and the exhaust port 311 is located on the outer surface of the cutting tool 3.

[0024] The cutting object of the CNC cutting system is a cutting object that is not suitable for contact with liquids. Specifically, the cutting object is a wooden material. Of course, the cutting object can also be other cutting objects that are not suitable for contact with liquids, such as printed circuit boards.

[0025] The aforementioned CNC cutting system provides a continuously accessible cooling air delivery channel within the spindle 1, connecting it to a preset tool cooling and chip removal channel 31 within the cutting tool 3. This allows cooling air to be delivered from the interior of the spindle 1 to the cutting tool 3. This not only effectively cools the cutting tool 3, but also simultaneously cools the spindle 1, improving the overall cooling effect. Furthermore, since the cooling air is discharged from the interior of the cutting tool 3, it can better flush away chips, improving machining accuracy and surface quality. This CNC cutting system avoids the coolant recovery and processing issues associated with liquid cooling methods, making it suitable for cutting objects that are sensitive to liquids. It also overcomes the drawback of existing gas cooling methods, which cannot simultaneously cool the spindle.

[0026] In the above-mentioned cooling gas supply system 5, the function of the pressurized gas output unit 51 is to pressurize the gas through a gas conveying machine (used to convert mechanical energy into gas pressure); the function of the gas cooling unit 52 is to cool the gas (to obtain cooling gas) to meet the use needs of the CNC cutting processing system; the function of the cooling gas delivery control unit 53 is to control the cooling gas delivery, at least including the on-off control of the cooling gas, and usually can also adjust the flow rate of the cooling gas.

[0027] In an optional embodiment, the gas cooling unit 52 is a cold dryer. The cold dryer can cool the gas (such as air) to below the dew point temperature, thereby reducing the gas temperature and moisture content at the same time.

[0028] In an optional embodiment, the cooling air delivery control unit 53 includes a solenoid valve for controlling the on / off flow of the cooling air. The solenoid valve signal is connected to the controller 6 of the CNC cutting system. CNC cutting systems all have controllers, and the controller 6 is used to control the entire CNC cutting system, for example, controlling the feed motion of the spindle feed mechanism 2, tool changes, and the speed of the spindle 1.

[0029] Generally speaking, the spindle 1 includes: a spindle body 11, a spindle motor 12, a shaft core 13, a front bearing system 14, a rear bearing system 15, a tool holder locking and releasing mechanism 16 and other parts; wherein, the spindle body 11 is the core supporting component of the spindle 1, and is used to be assembled with the other parts of the spindle 1 to form the spindle 1; the spindle motor 12 includes a motor stator 121 and a motor rotor 122, and the motor stator 121 is fixed in the spindle body 11, and the motor rotor 122 is adapted to the motor stator 121; the shaft core 13 is rotatably mounted in the spindle body 11 through the front bearing system 14 and the rear bearing system 15 and rotates with the motor rotor 122, and a tool holder assembly structure is provided at the front end of the shaft core 13; the front bearing system 14 includes a front bearing seat and a front shaft The front bearing seat is arranged at the front end of the spindle body 11, and the front bearing is installed in the front bearing seat and rotatably supports the front part of the shaft core 13; the rear bearing system 15 includes a rear bearing seat and a rear bearing, and the rear bearing seat is arranged at the rear end of the spindle body, and the rear bearing is installed in the rear bearing seat and rotatably supports the rear part of the shaft core 13; the tool handle locking and releasing mechanism 16 includes an actuator 161 and a driving mechanism 162, when the driving mechanism 162 operates in the first driving mode, the actuator 161 can lock the tool handle 4 so that the tool handle 4 is closely matched with the tool handle assembly structure, and when the driving mechanism 162 operates in the second driving mode, the actuator 161 releases the tool handle 4 so that the tool handle 4 can be detached from the tool handle assembly structure.

[0030] Referring to the contents recorded in the prior patent application document of the applicant with publication number CN115889827A, similarly, in the present utility model: the actuator 161 includes a pull rod and a tool handle clamping tensioning and closing component, the tool handle clamping tensioning and closing component is installed at the front end of the pull rod to form a tool handle clamping mechanism, the tool handle clamping mechanism is sleeved in the shaft core 13 and can move axially back and forth as a whole under the drive of the pull rod, the channel in the shaft core 13 for accommodating the tool handle clamping tensioning and closing component has a front end expansion portion and a rear end contraction portion, when the tool handle clamping mechanism is driven by the pull rod When the lower whole moves axially from front to back and the tensioning and closing component for clamping the knife handle moves from the front end expansion portion to the rear end contraction portion, the tensioning and closing component for clamping the knife handle is squeezed by the rear end contraction portion and closes inward, thereby clamping the knife handle head and driving the knife handle to fit tightly with the knife handle assembly structure. When the knife handle clamping mechanism moves axially from back to front as a whole under the drive of the pull rod and the tensioning and closing component for clamping the knife handle moves from the rear end contraction portion to the front end expansion portion, the tensioning and closing component for clamping the knife handle gradually releases the knife handle head, allowing the knife handle to detach from the knife handle assembly structure.

[0031] Similarly, in the present invention: the driving mechanism 162 includes a pull rod forward pushing mechanism and a pull rod backward reset mechanism, the pull rod forward pushing mechanism is installed at the rear end of the spindle body and has a pushing component corresponding to the rear end of the pull rod and a pushing drive device (specifically a cylinder) for driving the pushing component to move forward, the pull rod backward reset mechanism has an elastic component installed between the core shaft and the pull rod and continuously applies an elastic force to the pull rod to move backward, when the driving mechanism operates in the second driving mode, the pushing component moves forward and pushes the pull rod forward, the pull rod overcomes the elastic force of the elastic component and causes the tool holder clamping mechanism to move axially from back to front as a whole, when the driving mechanism operates in the first driving mode, the pushing component moves backward and disengages from the pull rod, the pull rod causes the tool holder clamping mechanism to move axially from front to back as a whole through the elastic force of the elastic component.

[0032] The cooling air delivery channel can be designed to extend in a curved manner in the main shaft 1 or to be unevenly distributed in the main shaft 1 (concentrated in the heat generating area and sparse in other areas), thereby improving the cooling effect on the main shaft 1.

[0033] In this embodiment, specifically, the shaft core 13 is provided with a cooling air delivery channel 131 that axially passes through the shaft core 13, and the main shaft 1 further includes a cooling air connector 17, which is mounted at the rear end of the shaft core 13 and includes a sleeve 171, a sleeve rotation support bearing 172, a sleeve rotation support bearing seat 173, and an air inlet connector 174. The sleeve 171 is sleeved on the shaft core 13 and mounted in the sleeve rotation support bearing seat 173 via the sleeve rotation support bearing 172. The sleeve rotation support bearing seat 173 is fixed to the main shaft body (specifically, the rear part of the cylinder). The air inlet connector 174 is mounted at the rear end of the sleeve rotation support bearing seat 173 and is provided with the interface 18. The interface 18 is connected to the cooling air delivery channel 131 through the air channel in the air inlet connector 174 and the sleeve 171. It can be seen that the cooling air delivery channel 131 serves as the main part of the cooling air delivery channel. The cooling air connector 17 is arranged at the rear end of the shaft core 13 , which has little impact on the structure of the main shaft 1 and facilitates modification of the main shaft 1 .

[0034] The air intake joint 174 specifically includes an air intake joint body 174a, an outer sealing sleeve 174b, an inner sealing sleeve 174c, an air intake joint front end cover 174d and a T-shaped head air guide tube 174e. An axial hole groove is provided in the air intake joint body 174a. The interface 18 is arranged at the rear of the air intake joint body 174a and is connected to the rear port of the axial hole groove. The outer sealing sleeve 174b is sleeved in the axial hole groove and can move axially along the axial hole groove. The inner sealing sleeve 174c is sleeved in the outer sealing sleeve 174b and can move axially along the axial hole groove under the guidance of the outer sealing sleeve 174b. The rear end of the inner sealing sleeve 174c has a sealing portion for cooperating with the rear port and a plurality of air distribution holes 174f distributed on the outside of the sealing portion. The plurality of air distribution holes 174f They are respectively connected to the inner cavity of the inner sealing sleeve 174c, the front end cover 174d of the air intake joint is installed on the front end surface of the air intake joint body 174a and a first axial compression spring 174g is installed between the outer sealing sleeve 174b, the rear end of the T-shaped head air guide tube 174e passes backward through the front end cover 174d of the air intake joint and is connected to the outer sealing sleeve 174b and is connected to the inner cavity of the inner sealing sleeve 174c, the front end of the T-shaped head air guide tube 174d has a pressure plate 174h, the pressure plate 174h is installed on the front end surface of the front end cover 174d of the air intake joint through a rotation-stop structure and a second axial compression spring 174i is installed between the front end cover 174d of the air intake joint, and the pressure plate 174h is in contact with the rear end surface of the sleeve 171 through a pair of wear-resistant sealing rings 174j.

[0035] The working principle of the above-mentioned air inlet joint 174 is as follows: when the gas delivery control unit 53 passes cooling air into the interface 18, the cooling air flow squeezes the inner sealing sleeve 174c forward and then drives the outer sealing sleeve 174b and the T-head air guide tube 174e to move forward, so that the pair of wear-resistant sealing rings 174j contact each other. At this time, the sealing portion of the inner sealing sleeve 174c is separated from the rear port of the axial hole groove, and the cooling air enters the inner cavity of the inner sealing sleeve from the multiple air distribution holes 174f and enters the sleeve 171 through the T-head air guide tube 174e, and further enters the cooling air delivery channel 131; when the gas delivery control unit 53 stops passing cooling air into the interface 18, the first axial compression spring 174g pushes the outer sealing sleeve 174b backward and then drives the inner sealing sleeve 174c and the T-head air guide tube 174e to move backward, so that the pair of wear-resistant sealing rings 174j are separated from each other and at the same time the sealing portion blocks the rear port.

[0036] When the gas delivery control unit 53 stops supplying cooling air to the port 18, the first axial compression spring 174g of the air inlet connector 174 pushes the inner sealing sleeve 174c backward, causing the sealing portion of the inner sealing sleeve 174c to automatically block the rear port. This prevents the backflow of cooling air, prevents impurities or debris from the front of the spindle 1 from entering the spindle 1, and prevents blockage of the cooling air delivery channel. The multiple air distribution holes 174f distributed on the outer side of the sealing portion help evenly distribute the cooling air into the inner cavity of the inner sealing sleeve 174c, reducing the possibility of localized high pressure or turbulence.

[0037] In this embodiment, as an improvement, a pressure relief structure is connected to the side wall of the sleeve rotation support bearing seat 173 in the radially outer area of ​​the pair of wear-resistant sealing rings 174j. Specifically, the pressure relief structure includes a pressure relief port opened on the side wall of the sleeve rotation support bearing seat 173. Normally, when the pressure relief port is not needed for pressure relief (for example, when the pair of wear-resistant sealing rings 174j have a good sealing effect), a plug 174k can be installed on the pressure relief port; when the pressure relief port is needed for pressure relief, a cooling air return pipe can be connected to the pressure relief port to guide the leaked cooling air out of the main shaft 1 to avoid internal pressure accumulation. In other words, the above-mentioned pressure relief structure provides a fault tolerance mechanism for the failure of the seal between the wear-resistant sealing rings 174j. If the seal between the wear-resistant sealing rings 174j fails, the pressure relief port can prevent excessive accumulation of cooling air inside the main shaft, avoiding the pressure problems that may arise from this, and greatly improving the safety of the system. In addition, the presence of the pressure relief structure makes it easier for operators to detect the failure of the seal between the wear-resistant sealing rings 174j. For example, in an optional embodiment, a cooling air return pipe is connected to the pressure relief port, and a flow monitor is provided on the cooling air return pipe. Once the flow monitor finds that the cooling air flow in the cooling air return pipe reaches a set value, it will alarm to remind the operator to replace the wear-resistant sealing ring 174j.

[0038] In this embodiment, as an improvement, a conical surface is further provided between the neck of the T-shaped head air guide tube 174e and the pressure plate 174h, and a conical groove is provided on the front end surface of the front end cover 174d of the air inlet joint to match the conical surface (see Figure 4 The wear-resistant sealing ring on the pressure plate is mounted in a groove on the front end of the pressure plate 174h, with the bottom of the groove adjacent to the conical surface. This design reduces the size of the pressure plate 174h, thereby conserving the volume of the air inlet connector 174.

[0039] In this embodiment, as an improvement, the CNC cutting processing system further includes a chip recovery device 6, which includes an air suction hood 61 installed in front of the spindle 1 and an annular chip collection curtain 62 connected to the air suction hood 61. When in operation, the annular chip collection curtain 62 surrounds the outer side of the cutting tool 3 and forms a barrier to prevent chips from diffusing outward. The air suction hood 61 is connected to the exhaust device via an air suction duct 63. The chip recovery device 6 can collect chips generated during the processing, prevent chips from being scattered into the working environment, improve the cleanliness and safety of the working environment, reduce potential damage to operators and equipment caused by chips, and facilitate centralized processing and recycling of chips.

[0040] In the chip recovery device 6, the annular chip curtain 62 can be formed by densely covering the annular chip curtain 62 with a flexible linear material. Forming the annular chip curtain 62 with densely covering the annular chip curtain 62 with a flexible linear material (such as plastic strips) can improve the flexibility of the annular chip curtain 62, ensure sealing without hindering the movement of the cutting tool, and effectively block the chips. In addition, the annular chip curtain 62 can also maintain stability during the processing process.

[0041] In the chip recovery device 6, the air hood 61 can be mounted on the spindle 1, and an air flow channel is formed between the air hood 61 and the outer cylindrical surface of the spindle. Thus, the air flow channel can further cool the spindle and improve the processing accuracy of the spindle.

[0042] Furthermore, in the chip recovery device 6, the air extraction device may include a gas delivery mechanism and a filter 64 positioned upstream of the gas delivery mechanism. Furthermore, the gas delivery mechanism may also serve as the pressurized gas output unit 51. Since the pressurized gas output unit 51 and the chip recovery device 6 share the same gas delivery mechanism, the structure of the CNC cutting system can be simplified, saving costs.

[0043] In this embodiment, as an improvement, the spindle 1 further includes a heat dissipation cover 19, which is mounted on the rear section of the spindle 1. The front section of the heat dissipation cover 19 is provided with an air inlet, and the rear section is provided with a fan 191. The heat dissipation cover 19 and the fan 191 can further enhance the heat dissipation of the spindle 1.

[0044] Regarding the spindle feeding mechanism 2. The spindle feeding mechanism 2 can generally drive the spindle 1 to do feeding motion along the X axis, Y axis and Z axis respectively (such as Figure 1 This spindle feeding mechanism 2 is prior art and will not be described in detail here.

[0045] Figure 5 This is a schematic structural diagram of a cutting tool according to an embodiment of the utility model. Figure 6 This is a schematic diagram of the structure of another cutting tool in the embodiment of the utility model. Figure 5-Figure 6As shown, the cutting tool 3 is provided with a tool cooling and chip removal channel 31, which is an air flow conveying channel preset in the cutting tool 3 and in which the exhaust port 311 is located on the outer surface of the cutting tool body. The air flow conveying channel comprises an axial channel extending along the axial direction of the cutting tool. The exhaust port can be arranged at the bottom and / or side of the cutting tool. Different exhaust ports can be arranged at intervals on the side along the length direction of the cutting tool. Different exhaust ports can be arranged at intervals on the side along the rotation direction of the cutting tool. The cutting tool is usually a milling cutter.

[0046] The above describes the relevant contents of the present invention. Based on these descriptions, a person skilled in the art will be able to implement the present invention. Based on the above contents of this specification, all other embodiments obtained by a person skilled in the art without inventive work should fall within the scope of patent protection.

Claims

1. A cutting tool, characterized in that: The cutting tool is provided with a tool cooling and chip removal channel, which is an air flow conveying channel preset in the cutting tool and whose exhaust port is located on the outer surface of the cutting tool body; When in use, it is installed in a CNC cutting processing equipment, which includes: a spindle, used to install a cutting tool and drive the cutting tool to rotate around the central axis of the tool holder on which the cutting tool is installed when the CNC cutting processing equipment is working; a spindle feeding mechanism, used to install the spindle and drive the spindle to perform feeding movement in a set manner when the CNC cutting processing equipment is working; a cooling gas supply system, the cooling gas supply system includes a pressurized gas output unit, a gas cooling unit and a cooling gas delivery control unit, the outlet of the cooling gas delivery control unit is connected to the corresponding interface on the spindle; a continuously conductive cooling gas delivery channel is provided in the spindle, the inlet of the cooling gas delivery channel is connected to the outlet of the cooling gas delivery control unit through the interface, and the outlet of the cooling gas delivery channel passes through the tool holder and is connected to the tool cooling and chip removal channel in the cutting tool.

2. A cutting tool according to claim 1, characterized in that: The exhaust port is arranged at the bottom and / or the side of the cutting tool.

3. A cutting tool according to claim 2, characterized in that: Different exhaust ports are arranged at intervals on the side portion along the length direction of the cutting tool; and / or different exhaust ports are arranged at intervals on the side portion along the rotation direction of the cutting tool.

4. A cutting tool according to any one of claims 1 to 3, characterized in that: The air flow delivery channel includes an axial channel extending along the axial direction of the cutting tool.

5. A cutting tool according to any one of claims 1 to 3, characterized in that: The cutting tool is a milling cutter.

6. A CNC cutting system comprising: cutting tools; as well as a spindle for mounting the cutting tool and driving the cutting tool to rotate about the central axis of the tool holder on which the cutting tool is mounted when the CNC cutting machine is in operation; A spindle feeding mechanism, used for mounting the spindle and driving the spindle to perform feeding motion along the X-axis, Y-axis and Z-axis respectively; Its characteristics are: The cutting tool is specifically a cutting tool according to any one of claims 1 to 5; It also includes a cooling gas supply system, which includes a pressurized gas output unit, a gas cooling unit and a cooling gas delivery control unit, and the outlet of the cooling gas delivery control unit is connected to the corresponding interface on the main shaft; A continuously conductive cooling air delivery channel is provided in the spindle, the inlet of the cooling air delivery channel is connected to the outlet of the cooling air delivery control unit through the interface, and the outlet of the cooling air delivery channel passes through the tool holder and is connected to the tool cooling and chip removal channel in the cutting tool.

7. A CNC cutting system according to claim 6, characterized in that: Its main axes include: Spindle body; A spindle motor, comprising a motor stator and a motor rotor, wherein the motor stator is fixed in the spindle body, and the motor rotor is adapted to the motor stator; A shaft core, the shaft core is rotatably mounted in the spindle body through a front bearing system and a rear bearing system and rotates with the motor rotor, a tool handle assembly structure is provided at the front end of the shaft core, and a cooling air delivery channel is provided in the shaft core and axially passes through the shaft core; A front bearing system, comprising a front bearing seat and a front bearing, wherein the front bearing seat is disposed at the front end of the spindle body, and the front bearing is mounted in the front bearing seat and rotatably supports the front portion of the shaft core; A rear bearing system, comprising a rear bearing seat and a rear bearing, wherein the rear bearing seat is disposed at the rear end of the spindle body, and the rear bearing is mounted in the rear bearing seat and rotatably supports the rear portion of the shaft core; a knife handle locking and releasing mechanism, the knife handle locking and releasing mechanism comprising an actuator and a driving mechanism, wherein when the driving mechanism operates in a first driving mode, the actuator can lock the knife handle so that the knife handle and the knife handle assembly structure are tightly matched, and when the driving mechanism operates in a second driving mode, the actuator can release the knife handle so that the knife handle can be separated from the knife handle assembly structure; and a cooling air connector, the cooling air connector being mounted on the rear end of the shaft core and comprising a sleeve, a sleeve rotation support bearing, a sleeve rotation support bearing seat, and an air inlet connector; the sleeve being sleeved on the shaft core and mounted in the sleeve rotation support bearing seat via the sleeve rotation support bearing; the sleeve rotation support bearing seat being fixed to the main shaft body; the air inlet connector being mounted on the rear end of the sleeve rotation support bearing seat and being provided with the interface; the interface being communicated with the cooling air delivery channel via the air inlet connector and the air passage in the sleeve; The cam is threadably connected to the side of the air intake pipe, and the cam is secured to the interior of the pipe with a secure connection to the side of the intake pipe. The cam is secured to the interior of the pipe with a secure connection to the side of the intake pipe. The front end of the T-shaped head air guide pipe is provided with a pressure plate, and the pressure plate is installed on the front end surface of the front end cover of the intake joint through a rotation-stop structure, and a second axial compression spring is installed between the pressure plate and the rear end surface of the sleeve through a pair of wear-resistant sealing rings. When the cooling air delivery control unit passes cooling air into the interface, the cooling air flow squeezes the inner sealing sleeve forward and thereby drives the outer sealing sleeve and the T-shaped head air guide pipe to move forward, so that the pair of wear-resistant sealing rings contact each other, and the cooling air enters the inner cavity of the inner sealing sleeve from the multiple air distribution holes and enters the sleeve through the T-shaped head air guide pipe. When the cooling air delivery control unit stops passing cooling air into the interface, the first axial compression spring pushes the outer sealing sleeve backward and thereby drives the inner sealing sleeve and the T-shaped head air guide pipe to move backward, so that the pair of wear-resistant sealing rings separate from each other and at the same time causes the sealing portion to block the rear port.

8. A CNC cutting system according to claim 7, characterized in that: A conical surface is provided between the neck of the T-shaped head air guide tube and the pressure plate, and a conical groove matching the conical surface is provided on the front end surface of the front end cover of the air intake joint; the wear-resistant sealing ring located on the pressure plate in the pair of wear-resistant sealing rings is installed in the groove on the front end surface of the pressure plate, and the bottom of the groove is close to the conical surface.

9. A CNC cutting system according to claim 7, characterized in that: It also includes a chip recovery device, which includes an air suction hood installed in front of the spindle and an annular chip collection curtain connected to the air suction hood. When working, the annular chip collection curtain surrounds the outside of the cutting tool and forms a barrier to prevent chips from spreading outward. The air suction hood is connected to the exhaust device through an air suction duct.

10. The CNC cutting system according to claim 7, wherein: A pressure relief structure is connected to the side wall of the sleeve rotation support bearing seat in the radial outer area of ​​the pair of wear-resistant sealing rings.

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