An internally cooled CNC tool for machining valve parts

Abstract

The invention discloses an internally cooled CNC tool for machining valve components. A drilling tool tip and a boring tool tip are provided on the internally cooled CNC tool. The drilling tool tip is used for drilling holes in the valve components, and the boring tool tip is used for boring holes in the valve components. An axial gap is provided between the drilling tool tip and the boring tool tip, that is, the drill tip is arranged at the end of the internally cooled CNC tool, and the drill tip is arranged at the middle of the internally cooled CNC tool. During the machining process, the drilling tool tip contacts the valve component to be machined to drill the valve component. With the axial feed of the tool, the boring tool tip contacts the workpiece to be machined to bore the inner wall of the hole after drilling, thereby realizing drilling and boring of the valve component by a single tool, and no tool change operation is required between different machining processes. Not only the machining efficiency is improved, but also the accumulated machining errors caused by tool change are eliminated, thereby improving the production accuracy of the valve components.

Description

Technical Field

[0001] The invention belongs to the technical field of numerical control tools, and in particular relates to an internally cooled numerical control tool for machining valve components. Background Art

[0002] A CNC machine tool is an automated machine tool equipped with a program control system. The control system can logically process programs specified by control codes or other symbolic instructions, decode them, express them in coded numbers, and input them into the CNC device through information carriers. After calculation and processing, the CNC device sends various control signals to control the movement of the machine tool and automatically process parts according to the shape and size required by the drawing.

[0003] During the processing of valve components, it is often necessary to drill holes in the valve components and bore the inner walls of the holes to improve the dimensional accuracy of the valve components. Currently, CNC tools on the market only have a single processing function, that is, each tool can only complete one processing operation. When drilling or boring is required, the turret needs to be rotated to change the tool. On the one hand, the tool change process is prone to error accumulation, and on the other hand, it will reduce the processing efficiency of parts. Summary of the invention

[0004] In view of the above shortcomings, the technical problem to be solved by the present invention is to provide an internally cooled CNC tool for valve component machining, which can perform drilling and boring operations on the valve component and improve the parts machining efficiency.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] A kind of internal cooling type numerical control tool for valve component processing, the internal cooling type numerical control tool is provided with a drilling tool tip and a boring tool tip, and a liquid flow channel is provided inside the internal cooling type numerical control tool, the liquid flow channel is respectively arranged toward the drilling tool tip and the boring tool tip, so that the coolant in the liquid flow channel is sprayed toward the drilling tool tip and the boring tool tip; the end of the internal cooling type numerical control tool is telescopically installed with a spray control component, the spray control component is adapted to the liquid flow channel, so that the liquid flow channel can be controlled to be on and off by the spray control component.

[0007] As a preferred solution of the present invention, the liquid spray control assembly includes a control valve shaft and a sealing ring. The control valve shaft is slidably installed on the end of the internally cooled CNC tool. The sealing ring is arranged between the control valve shaft and the internally cooled CNC tool. The on-off condition of the liquid flow channel and the deformation of the sealing ring are changed by axially moving the control valve shaft.

[0008] As a preferred solution of the present invention, a liquid inlet hole is provided on the end side wall of the internally cooled CNC tool, and a liquid blocking section and a liquid inlet section are provided on the control valve shaft. The liquid blocking section or the liquid inlet section is connected to the liquid inlet hole by moving the control valve shaft, and a liquid inlet channel is provided in the liquid inlet section, and the liquid inlet channel and the liquid flow channel are adapted to each other.

[0009] As a preferred solution of the present invention, an adjusting cavity is provided at the end of the internally cooled CNC tool, the control valve shaft is slidably installed in the adjusting cavity, and the liquid inlet channel and the liquid flow channel are respectively connected to the adjusting cavity.

[0010] As a preferred embodiment of the present invention, the liquid flow channel includes a drilling channel arranged toward the drilling tool tip, a boring tool channel arranged toward the boring tool tip, and a part channel, and the part channel is arranged between the drilling tool tip and the boring tool tip, and arranged toward the surface of the valve component.

[0011] As a preferred solution of the present invention, the boring tool channel is connected to the part channel, and the part channel is arranged along the axial direction of the internal cooling type CNC tool.

[0012] As a preferred solution of the present invention, an axial gap is provided between the drilling tool tip and the boring tool tip, the drill tip is arranged at the end of the internally cooled CNC tool, and the drill tip is arranged in the middle of the internally cooled CNC tool.

[0013] As a preferred solution of the present invention, the internally cooled CNC tool is provided with a tool tip plane, and a chip groove is provided at the end of the internally cooled CNC tool, and the chip groove is connected to the tool tip plane so that the processing waste chips can be discharged into the tool tip plane through the chip groove.

[0014] As a preferred solution of the present invention, the bottom of the internally cooled CNC tool is provided with a drill arc surface, a retracted arc surface and a boring tool arc surface, the drill arc surface and the boring tool arc surface are transitionally connected by the retracted arc surface, and the distance between the boring tool tip and the axis of the internally cooled CNC tool is smaller than the distance between the drill arc surface and the axis of the internally cooled CNC tool.

[0015] As a preferred solution of the present invention, a boring tool installation groove is provided on the tool tip plane, a counter boring tool is installed in the boring tool installation groove, and a boring tool tip is formed on the counter boring tool.

[0016] As a preferred solution of the present invention, a positioning surface is provided in the boring tool installation groove, and the counter boring tool abuts against the positioning surface.

[0017] As a preferred solution of the present invention, a boring tool locking assembly is provided on the inner side of the boring tool mounting groove, and the end of the boring tool locking assembly extends into the boring tool mounting groove so that the counter boring tool can be locked in the boring tool mounting groove through the boring tool locking assembly.

[0018] As a preferred solution of the present invention, the boring tool locking assembly includes a locking head and an centrifugal head. The centrifugal head is arranged along the axial direction of the internally cooled CNC tool, and the locking head is arranged along the axial direction of the internally cooled CNC tool, and the centrifugal head abuts against the locking head so that the locking head extends into the boring tool mounting groove.

[0019] The beneficial effect of the present invention is that a drilling tool tip and a boring tool tip are provided in the tool, so that drilling and boring processing of valve components can be carried out by a single tool, and there is no need to change tools between different processing processes. This not only improves the processing efficiency, but also eliminates the accumulation of processing errors caused by tool changing, thereby improving the production accuracy of valve components. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic structural diagram of an internally cooled CNC tool according to the first embodiment.

[0021] Figure 2 yes Figure 1 Schematic diagram of the structure after rotating at a certain angle.

[0022] Figure 3 It is a cross-sectional view of the internal cooling type CNC tool of the first embodiment.

[0023] Figure 4 yes Figure 3 A partial enlarged view of point A in the middle.

[0024] Figure 5 It is a structural schematic diagram of the internally cooled CNC tool of the second embodiment.

[0025] Figure 6 It is a schematic structural diagram of an internally cooled CNC tool according to Embodiment 3.

[0026] Figure 7 It is a partial enlarged view of the tip of the internally cooled CNC tool of Example 3.

[0027] Figure markings: drilling tool tip 1, boring tool tip 2, drilling channel 4, boring tool channel 5, part channel 6, tool tip plane 7, chip groove 8, drill bit arc surface 9, retracted arc surface 10, boring tool arc surface 11, boring tool mounting groove 12, counter boring tool 13, positioning surface 14, boring tool locking assembly 15, locking head 15-1, centrifugal head 15-2, tension spring 15-3, thrust spring 15-4, main channel 16, injection control assembly 17, control valve shaft 17-1, sealing ring 17-2, liquid blocking section 17-3, liquid inlet section 17-4, liquid inlet channel 17-5, liquid inlet groove 17-6, control end 17-7, liquid inlet hole 18, regulating chamber 19, reset spring 20. DETAILED DESCRIPTION

[0028] The present invention will be further described below in conjunction with the accompanying drawings.

[0029] Embodiment 1

[0030] The invention discloses an internally cooled CNC tool for machining valve components. A drilling tool tip 1 and a boring tool tip 2 are provided on the internally cooled CNC tool. The drilling tool tip 1 is used for drilling holes in the valve components, and the boring tool tip 2 is used for boring holes in the valve components. An axial gap is provided between the drilling tool tip 1 and the boring tool tip 2, that is, the drill tip is arranged at the end of the internally cooled CNC tool, and the drill tip is arranged at the middle of the internally cooled CNC tool. During the machining process, the drilling tool tip 1 contacts the valve component to be machined to drill the valve component. With the axial feed of the tool, the boring tool tip 2 contacts the workpiece to be machined to bore the inner wall of the hole after drilling, thereby realizing drilling and boring of the valve component by a single tool, and no tool change operation is required between different machining processes. This not only improves the machining efficiency, but also eliminates the accumulation of machining errors caused by tool change, thereby improving the production accuracy of the valve components.

[0031] Due to the process characteristics of boring, if one-time feeding is used to complete the drilling and boring process of the workpiece, the distance between the boring tool tip 2 and the axis of the internal cooling type CNC tool must be greater than the distance between the drilling tool tip 1 and the axis of the internal cooling type CNC tool. When the depth of the processed hole is large, the length of the tool is at least twice the depth of the hole, which makes the tool relatively slender and its rigidity is poor, resulting in poor coaxiality of the processed hole. In order to solve the above technical problems, the distance between the boring tool tip 2 and the axis of the internal cooling type CNC tool in the present application is smaller than the distance between the drilling tool tip 1 and the axis of the internal cooling type CNC tool, so that when the drilling tool tip 1 is drilling, the boring tool tip 2 does not contact the workpiece. After the drilling is completed, the boring tool tip 2 is moved to contact the surface of the workpiece, thereby processing the inner wall of the hole.

[0032] During the movement of the tool, if the side wall of the tool is a complete circle, since the cutting edge of the drilling tool tip 1 is consistent with the diameter of the tool, the side wall of the tool will come into contact with the inner wall of the hole, resulting in a tool collision. To prevent the tool collision, the side wall of the tool includes a drill arc surface 9, an inner shrinkage arc surface 10 and a boring tool arc surface 11, wherein the drill arc surface 9 is connected to the drilling tool tip 1, and the boring tool arc surface 11 is connected to the inner edge of the boring tool tip 2, that is, the boring tool tip 2, a protruding boring tool arc surface 11 is provided, the drill arc surface 9 and the boring tool arc surface 11 are transitionally connected through the retracted arc surface 10, the distance between the boring tool tip 2 and the axis of the internal cooling type CNC tool is smaller than the distance between the drill arc surface 9 and the axis of the internal cooling type CNC tool, and the drill arc surface 9 and the boring tool arc surface 11 are both located inside the circumferential surface where the drill arc surface 9 is located, and when the tool moves radially during the boring process, the side wall of the tool does not contact the inner wall of the machined hole. In order to further prevent the drill arc surface 9 from contacting the inner wall of the hole, the arc length of the drill arc surface 9 is less than one-fourth of the arc length of the circumference where the drill arc surface 9 is located.

[0033] In this embodiment, the hole processing of the workpiece by the tool includes three steps. First, the tool is fed axially and the hole is processed in the workpiece by the drilling tool tip 1. When the hole processing is completed, the tool is driven to move radially so that the boring tool tip 2 contacts the workpiece. Finally, the tool is driven to retract axially and the inner wall of the hole is bored by the boring tool tip 2.

[0034] A tool tip plane 7 is provided on the internally cooled CNC tool, so that the tool tip of the tool is semicircular, which is convenient for the discharge of machining waste chips from the machined hole, prevents the waste chips from damaging the inner wall of the hole, and further improves the machining accuracy of the inner wall of the hole. The boring tool tip 2 is formed on the tool tip plane 7, and a chip groove 8 is provided at the end of the internally cooled CNC tool. The chip groove 8 is connected to the tool tip plane 7. The waste chips generated by the drilling tool tip 1 are discharged into the tool tip plane 7 through the chip groove 8, and the waste chips are discharged to the outside of the hole through the gap between the tool tip plane 7 and the inner wall of the hole.

[0035] A liquid flow channel is provided in the internal cooling type CNC tool, and the liquid flow channel includes a drilling channel 4 arranged toward the drilling tool tip 1, a boring tool channel 5 arranged toward the boring tool tip 2, and a part channel 6. The parts in the processing area where the drilling tool tip 1 and the boring tool tip 2 are located are cooled through the drilling channel 4 and the boring tool channel 5, and at the same time, the coolant can flush the waste chips generated by the processing away from the workpiece surface, thereby preventing the waste chips from affecting the quality of the inner wall of the hole; the part channel 6 is arranged along the axial direction of the internal cooling type CNC tool, that is, the opening of the part channel 6 is arranged on the drill bit arc surface 9. When drilling, the drill bit arc surface 9 is in contact with the inner wall of the hole, and the part channel 6 does not spray coolant at this time. When boring, the drill bit arc surface 9 is separated from the inner wall of the hole, and the part channel 6 sprays liquid toward the inner wall of the hole. The coolant cools the inner wall of the hole, reduces the thermal deformation generated during the workpiece processing, and at the same time, the coolant sprayed from the part channel 6 overflows into the chip removal groove 8 under the action of the inner wall of the hole, thereby promoting the discharge of waste chips in the chip removal groove 8.

[0036] The boring tool channel 5 is connected to the part channel 6. Two main channels 16 are provided in the tool, one of which is connected to the drilling channel 4, and the other is connected to the connection between the boring tool channel 5 and the part channel 6, thereby providing coolant to the boring tool channel 5 and the part channel 6 at the same time.

[0037] A liquid spray control component 17 is telescopically installed at the end of the internally cooled CNC tool. The liquid spray control component 17 is adapted to the liquid flow channel. The liquid flow channel is controlled by telescopic movement of the liquid spray control component 17 relative to the internally cooled CNC tool, so that the internally cooled CNC tool can be switched between having the function of spraying coolant and not having the function of spraying coolant.

[0038] An adjusting chamber 19 is provided at the end of the internally cooled CNC tool, and a liquid inlet hole 18 is provided on the side wall of the end of the internally cooled CNC tool. The liquid inlet hole 18 is connected to the adjusting chamber 19. At the same time, the two main channels 16 in the tool are also connected to the adjusting chamber 19. The liquid spray control component 17 is partially installed in the adjusting chamber 19, and the on-off condition between the liquid inlet hole 18 and the main channel 16 is changed by the liquid spray control component 17.

[0039] The liquid spray control assembly 17 includes a control valve shaft 17-1 and a sealing ring 17-2. The control valve shaft 17-1 is partially slidably installed in the adjustment chamber 19. The sealing ring 17-2 is arranged between the control valve shaft 17-1 and the internal cooling type CNC tool. The on-off state between the liquid inlet hole 18 and the main flow channel 16 is changed by sliding the control valve shaft 17-1. At the same time, during the sliding process of the control valve shaft 17-1, the distance between the inner end face of the control valve shaft 17-1 and the end of the internal cooling type CNC tool will be changed, thereby driving the sealing ring 17-2 to deform. A reset spring 20 is arranged between the control valve shaft 17-1 and the adjustment chamber 19. By setting the reset spring 20, the liquid inlet hole 18 and the main flow channel 16 are in a disconnected state under normal conditions.

[0040] The control valve shaft 17-1 includes a liquid blocking section 17-3, a liquid inlet section 17-4 and a control end 17-7 which are connected in sequence. The liquid blocking section 17-3 is slidably installed in the regulating chamber 19. Sealing rings are provided at both ends of the liquid blocking section 17-3. Under normal conditions, under the action of the reset spring 20, the liquid blocking section 17-3 abuts against the outer port of the regulating chamber 19. At this time, the liquid inlet hole 18 is directly opposite to the liquid blocking section 17-3. A liquid inlet channel 17-5 is provided in the liquid inlet section 17-4. The liquid inlet channel 17-5 is adapted to the liquid flow channel, and the liquid inlet The channel 17-5 extends to the end of the liquid blocking section 17-3, and a liquid inlet groove 17-6 is provided on the circumference of the liquid inlet section 17-4. The liquid inlet channel 17-5 is connected to the liquid inlet groove 17-6. The control valve shaft 17-1 moves axially under the action of external force, so that the liquid inlet hole 18 is opposite to the liquid inlet section 17-4. At this time, the coolant flows into the regulating chamber 19 through the liquid inlet channel 17-5, and then flows into the main channel 16 from the regulating chamber 19; the sealing ring 17-2 is located between the control end 17-7 and the end face of the internally cooled CNC tool.

[0041] The working principle of the liquid spray control assembly 17 is as follows:

[0042] Under normal conditions, the control valve shaft 17 - 1 is controlled by the return spring 20 so that the liquid inlet hole 18 faces the liquid blocking section 17 - 3 , and the coolant cannot flow into the regulating chamber 19 through the liquid inlet hole 18 .

[0043] When it is necessary to use the liquid cooling function of the tool, during the installation process of the tool, the tool is first abutted against the inner wall of the tool holder, and a certain axial force is applied to the tool to make the control valve shaft 17-1 move axially. At this time, the liquid inlet hole 18 is opposite to the liquid inlet section 17-4, and the coolant flows into the regulating chamber 19 through the liquid inlet channel 17-5, and then flows into the main channel 16 from the regulating chamber 19. Since the control valve shaft 17-1 moves axially, the sealing ring 17-2 is deformed, and the gap between the regulating chamber 19 and the liquid inlet section 17-4 is sealed by the sealing ring 17-2. At the same time, the sealing ring 17-2 will be deformed toward the outside of the tool, so that the sealing ring 17-2 abuts against the tool hole of the tool holder, thereby realizing the sealing between the tool and the tool holder and ensuring that the coolant flows into the liquid inlet hole 18.

[0044] Embodiment 2

[0045] This embodiment improves the structure of the boring tool tip 2 in the first embodiment, so that the drilling tool tip 1 and the boring tool tip 2 are split structures, so that the tool can switch between a single drilling function and a mixed function of drilling and boring. In this embodiment, a boring tool installation groove 12 is provided on the tool tip plane 7, and a counter boring tool 13 is installed in the boring tool installation groove 12. The counter boring tool 13 is fixed in the boring tool installation groove 12 by screws, and a boring tool tip 2 is formed on the counter boring tool 13.

[0046] In order to facilitate installation of the counter boring tool 13 , a positioning surface 14 is provided in the boring tool installation groove 12 .

[0047] The structure of the drilling tool tip 1 and the liquid flow channel structure of this embodiment are consistent with those of the first embodiment.

[0048] Embodiment 3

[0049] The present embodiment improves the structure of the counter boring tool 13 in the second embodiment. In the present embodiment, the counter boring tool 13 is installed in the boring tool installation groove 12 through a connecting shaft. A torsion spring is connected between the boring tool installation groove 12 and the counter boring tool 13. When no external force is applied, the boring tool tip 2 of the counter boring tool 13 extends out of the boring tool installation groove 12. At this time, the counter boring tool 13 abuts against the positioning surface 14 under the action of the torsion spring. The positioning surface 14 is relative to the radial line of the tool. The inclination angle is 1-2°. If the positioning surface 14 is parallel to the radial line of the tool, the counter-boring tool 13 is easily rotated by external force, resulting in failure of the counter-boring tool 13. By setting the positioning surface 14 to be inclined relative to the radial line of the tool, when the tool is axially retracted, the counter-boring tool 13 is subjected to the force generated by the processing and always abuts against the positioning surface 14, thereby realizing self-locking of the counter-boring tool 13 and preventing failure of the counter-boring tool 13.

[0050] To facilitate the function switching of the tool, a boring tool locking assembly 15 is provided on the inner side of the boring tool mounting groove 12, and the end of the boring tool locking assembly 15 extends into the boring tool mounting groove 12. The counter boring tool 13 is locked in the boring tool mounting groove 12 by the boring tool locking assembly 15 to prevent the boring tool tip 2 from extending out of the boring tool mounting groove 12, thereby preventing the waste chips generated during the drilling process from damaging the cutting edge of the boring tool tip 2 of the counter boring tool 13.

[0051] The boring tool locking assembly 15 includes a locking head 15-1 and a centrifugal head 15-2. The centrifugal head 15-2 is arranged along the axial direction of the internal cooling type CNC tool. A tension spring 15-3 is provided between the centrifugal head 15-2 and the internal cooling type CNC tool. Through the action of the first tension spring 15-3, the centrifugal head 15-2 is subjected to a tension force toward the axis direction of the tool. The locking head 15-1 is arranged along the axial direction of the internal cooling type CNC tool. A thrust spring 15-4 is provided between the locking head 15-1 and the internal cooling type CNC tool, so that the locking head 15-1 is subjected to a force that contracts the locking head 15-1 into the tool. The tension spring 15-3 The force acting on the locking head 15-1 and the centrifugal head 15-2 is greater than the force acting on the thrust spring 15-4, and the locking head 15-1 and the centrifugal head 15-2 abut against each other through the inclined surface, so that under normal conditions, the locking head 15-1 extends into the boring tool mounting groove 12 under the action of the centrifugal head 15-2. When the counter boring tool 13 is needed, the centrifugal head 15-2 is subjected to a larger release force by rotating the tool, and the locking head 15-1 and the centrifugal head 15-2 are separated, so that the locking head 15-1 retracts under the action of the thrust spring 15-4. After the locking head 15-1 retracts, the counter boring tool 13 pops out under the action of the torsion spring, thereby facilitating the counter boring tool 13 to process the inner wall of the hole.

[0052] The rest of the structure is consistent with that in the first embodiment.

[0053] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention; therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0054] Although this article uses more terms corresponding to the figure marks in the figures, it does not exclude the possibility of using other terms; these terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitations is contrary to the spirit of the present invention.

Claims

1. An internally cooled CNC tool for machining valve components, characterized in that: The internally cooled CNC tool is provided with a drilling tool tip (1) and a boring tool tip (2), and a liquid flow channel is provided inside the internally cooled CNC tool. The liquid flow channels are arranged toward the drilling tool tip (1) and the boring tool tip (2), respectively, so that the coolant in the liquid flow channel is sprayed toward the drilling tool tip (1) and the boring tool tip (2); a liquid spray control component (17) is telescopically mounted at the end of the internally cooled CNC tool, and the liquid spray control component (17) is adapted to the liquid flow channel so as to control the on and off of the liquid flow channel through the liquid spray control component (17); The liquid spray control assembly (17) comprises a control valve shaft (17-1) and a sealing ring (17-2); the control valve shaft (17-1) is slidably mounted on the end of an internally cooled CNC tool; the sealing ring (17-2) is arranged between the control valve shaft (17-1) and the internally cooled CNC tool; and the on-off condition of the liquid flow channel and the deformation amount of the sealing ring (17-2) are changed by axially moving the control valve shaft (17-1); A liquid inlet hole (18) is provided on the end side wall of the internally cooled CNC tool, and a liquid blocking section (17-3) and a liquid inlet section (17-4) are provided on the control valve shaft (17-1); the liquid blocking section (17-3) or the liquid inlet section (17-4) is connected to the liquid inlet hole (18) by moving the control valve shaft (17-1); a liquid inlet channel (17-5) is provided in the liquid inlet section (17-4), and the liquid inlet channel (17-5) is adapted to the liquid flow channel; An adjusting chamber (19) is provided at the end of the internally cooled CNC tool, a control valve shaft (17-1) is slidably mounted in the adjusting chamber (19), and a liquid inlet channel (17-5) and a liquid flow channel are respectively connected to the adjusting chamber (19); The internally cooled CNC tool is provided with a tool tip plane (7), and a chip removal groove (8) is provided at the end of the internally cooled CNC tool. The chip removal groove (8) is connected to the tool tip plane (7), so that machining waste chips are discharged into the tool tip plane (7) through the chip removal groove (8), and the boring tool tip (2) is formed on the tool tip plane (7); The liquid flow channel comprises a drilling channel (4) arranged towards the drilling tool tip (1), a boring tool channel (5) arranged towards the boring tool tip (2), and a part channel (6); the part channel (6) is arranged between the drilling tool tip (1) and the boring tool tip (2) and is arranged towards the surface of the valve component.

2. The internally cooled CNC tool for valve component machining according to claim 1, characterized in that: The boring tool channel (5) is communicated with the part channel (6), and the part channel (6) is arranged along the axial direction of the internally cooled CNC tool.

3. The internally cooled CNC tool for valve component machining according to claim 1, characterized in that: An axial gap is provided between the drilling tool tip (1) and the boring tool tip (2); the drill tool tip is arranged at the end of the internally cooled CNC tool, and the drill tool tip is arranged at the middle of the internally cooled CNC tool.

4. The internally cooled CNC tool for valve component machining according to claim 1, characterized in that: A boring tool mounting groove (12) is provided on the tool tip plane (7), a counter boring tool (13) is installed in the boring tool mounting groove (12), a boring tool locking assembly (15) is provided on the inner side of the boring tool mounting groove (12), and an end of the boring tool locking assembly (15) extends into the boring tool mounting groove (12) so that the counter boring tool (13) is locked in the boring tool mounting groove (12) through the boring tool locking assembly (15).

5. The internally cooled CNC tool for valve component machining according to claim 4, characterized in that: The boring tool locking assembly (15) comprises a locking head (15-1) and an eccentric head (15-2); the eccentric head (15-2) is arranged along the axial direction of the internally cooled CNC tool; the locking head (15-1) is arranged along the axial direction of the internally cooled CNC tool; and the eccentric head (15-2) abuts against the locking head (15-1) so that the locking head (15-1) extends into the boring tool mounting groove (12).

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