A milling head structure of a numerical control roller thread milling machine
By introducing air ducts, heat dissipation coatings, tungsten steel layers, and corrosion-resistant chromium plating layers into the milling head structure of CNC roll thread milling machines, the problems of poor heat dissipation and unstable connection of the milling cutter head are solved, achieving efficient processing and equipment stability, and extending the life of the milling cutter.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NANTONG WEIXING MASCH CO LTD
- Filing Date
- 2025-06-30
- Publication Date
- 2026-05-26
AI Technical Summary
Existing milling cutter heads have poor heat dissipation in CNC roll thread milling machines, resulting in increased temperature, which affects machining accuracy and lifespan. Furthermore, the connection is unstable and prone to loosening and wear.
A milling head structure was designed, which includes an air duct and an arc-shaped air inlet inside the drill rod, a heat dissipation coating, a tungsten steel layer and a corrosion-resistant chrome plating layer on the outside of the milling cutter, and a frustum-shaped pile to enhance connection stability. High-pressure gas is used to blow away iron filings and cool the milling cutter.
Effective heat dissipation reduces milling cutter temperature, prevents wear and deformation, improves machining accuracy and efficiency, extends service life, reduces equipment failure, and lowers maintenance costs.
Smart Images
Figure CN224273434U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of milling head technology, specifically a milling head structure for a CNC roll thread milling machine. Background Technology
[0002] The milling cutter head is a key component of a milling machine and is the direct execution part of the milling operation.
[0003] Chinese Patent No. 202010115424.8 discloses a milling cutter head and a milling cutter. The milling cutter head includes multiple arc-shaped cutting edges connected sequentially from end to end, wherein the arc-shaped cutting edge located on the first side of two adjacent arc-shaped cutting edges is tangent to the arc-shaped cutting edge located on the last side.
[0004] The heat dissipation effect of this utility model is poor during use. Prolonged use will cause the blade head to overheat, resulting in deformation or excessive wear. Utility Model Content
[0005] The purpose of this invention is to provide a milling head structure for a CNC roll thread milling machine to solve the problems raised in the prior art.
[0006] To achieve the above objectives, this utility model provides the following technical solution: a milling head structure for a CNC roll thread milling machine, comprising a milling head; the milling head consists of a drill rod and a milling cutter, the milling cutter is installed at the bottom end of the drill rod, an air duct is provided in the middle of the drill rod, an arc-shaped air inlet is provided at the upper end of the drill rod, the arc-shaped air inlet is connected to the air duct, and an air outlet is provided at the bottom end of the drill rod, the air outlet is connected to the air duct.
[0007] Preferably, the milling cutter has grooves around its perimeter.
[0008] Preferably, a tungsten steel layer is provided around the outer perimeter of the milling cutter, and the tungsten steel layer is welded to the outer perimeter of the milling cutter.
[0009] Preferably, the outer side of the milling cutter is provided with a heat dissipation coating, which is attached to the outer side of the milling cutter.
[0010] Preferably, a frustum-shaped pile is provided between the drill rod and the milling cutter, and the frustum-shaped pile is welded to the bottom end of the drill rod and the upper side of the milling cutter.
[0011] Preferably, the outside of the drill pipe is provided with a corrosion-resistant layer, which is a chrome-plated layer.
[0012] Compared with the prior art, the beneficial effects of this utility model are:
[0013] 1. When the CNC roll thread milling machine is working, the external high-pressure gas enters through the arc-shaped air inlet at the upper end of the drill rod. The arc design allows the gas to be guided more smoothly into the air duct. The gas flows downward along the air duct inside the drill rod and is finally ejected from the air outlet at the bottom end of the drill rod. The ejected high-pressure gas can effectively blow away the iron chips generated by the milling cutter during the cutting process, avoiding the accumulation of iron chips that affect the machining accuracy and the life of the milling cutter.
[0014] 2. During the milling process, the friction between the milling cutter and the roll material generates a large amount of heat, causing the milling cutter temperature to rise sharply. The heat dissipation coating on the outside of the milling cutter can effectively absorb and conduct the heat generated on the surface of the milling cutter, and quickly dissipate the heat to the surrounding environment. By accelerating the heat dissipation rate, the working temperature of the milling cutter is reduced, avoiding the degradation and deformation of the milling cutter material due to high temperature. This ensures the cutting performance and machining accuracy of the milling cutter, while also extending the service life of the milling cutter, reducing the frequency of milling cutter replacement, and improving the machining efficiency of CNC roll thread milling machines.
[0015] 3. When working on a CNC roll milling machine, the milling cutter is subjected to significant cutting forces during the cutting process, including axial and radial forces. The frustum-shaped stud between the drill rod and the milling cutter can evenly distribute the cutting forces on the drill rod. The welded connection method ensures high connection strength between the frustum-shaped stud, the drill rod, and the milling cutter, forming a solid integral structure. In this way, when bearing cutting forces, the frustum-shaped stud can effectively enhance the connection stability between the drill rod and the milling cutter, preventing the milling cutter from loosening or shifting during the cutting process, ensuring the accuracy and safety of milling, and also reducing milling cutter damage and equipment failure caused by unstable connection.
[0016] 4. In the working environment of a CNC roll milling machine, the drill rod may come into contact with corrosive media such as cutting fluid, coolant, and moisture in the air. The chrome plating layer on the outside of the drill rod, which is a corrosion-resistant layer, has good chemical stability and corrosion resistance. It can form a dense protective film on the surface of the drill rod, preventing corrosive media from directly contacting the drill rod substrate. Even during long-term use, the chrome plating layer can effectively prevent the drill rod from being corroded, ensuring that the structural strength and dimensional accuracy of the drill rod do not change. This ensures the stability and reliability of the drill rod when transmitting power and supporting the milling cutter for machining, extends the service life of the drill rod, and reduces equipment maintenance costs. Attached Figure Description
[0017] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:
[0018] Figure 1 This is a schematic diagram of the structure of this utility model;
[0019] Figure 2 This is a side view of the structure of this utility model;
[0020] Figure 3 This is a schematic diagram of the internal structure of the present invention;
[0021] Figure 4 This is a schematic diagram of the structure of the milling cutter of this utility model;
[0022] Figure 5 This is a schematic diagram of the cross-section of the drill pipe of this utility model.
[0023] In the diagram: 1. Milling head; 2. Drill rod; 3. Milling cutter; 4. Tungsten steel layer; 5. Groove; 6. Heat dissipation coating; 7. Air duct; 8. Frustum-shaped pile; 9. Arc-shaped air inlet; 10. Corrosion-resistant layer; 11. Air outlet. Detailed Implementation
[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0025] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 In this embodiment of the present invention, a milling head structure of a CNC roll thread milling machine includes a milling head 1; the milling head 1 is composed of a drill rod 2 and a milling cutter 3, the milling cutter 3 is installed at the bottom end of the drill rod 2, an air duct 7 is provided in the middle position inside the drill rod 2, an arc-shaped air inlet 9 is provided at the upper end of the drill rod 2, the arc-shaped air inlet 9 is connected to the air duct 7, and an air outlet 11 is provided at the bottom end of the drill rod 2, the air outlet 11 is connected to the air duct 7.
[0026] The milling cutter 3 has grooves 5 around its perimeter. When the milling cutter 3 performs thread milling on the roll, the grooves 5 around the milling cutter 3 can provide space for the cut iron chips to be contained, allowing the iron chips to be temporarily stored in the grooves 5. As the milling cutter 3 rotates, the iron chips are discharged from the processing area under the action of centrifugal force along the guide of the grooves 5. This design avoids the iron chips being repeatedly squeezed between the milling cutter 3 and the roll, reduces the risk of iron chips scratching the processing surface, ensures the surface quality of the roll thread, and also reduces the wear of iron chips on the cutting edge of the milling cutter 3.
[0027] The milling cutter 3 has a tungsten carbide layer 4 around its outer perimeter. The tungsten carbide layer 4 is welded to the outer side of the milling cutter 3. Tungsten carbide has characteristics such as high hardness, strong wear resistance, and good red hardness. During the CNC roll thread milling process, the tungsten carbide layer 4 on the outer side of the milling cutter 3 directly contacts the roll surface and performs cutting. Due to the extremely high hardness of the tungsten carbide layer 4, it can easily cut into the roll material, improving cutting efficiency. Its excellent wear resistance allows the tungsten carbide layer 4 to maintain a good cutting edge shape during long-term milling operations, reducing the wear rate of the milling cutter 3 and extending the service life of the milling cutter 3. The good red hardness ensures that the tungsten carbide layer 4 can still maintain high hardness and cutting performance when high temperatures are generated during the cutting process, ensuring the stability of machining accuracy.
[0028] A heat dissipation coating 6 is provided on the outer side of the milling cutter 3. The heat dissipation coating 6 is attached to the outer side of the milling cutter 3. During the milling process, the friction between the milling cutter 3 and the roll material will generate a lot of heat, causing the temperature of the milling cutter 3 to rise sharply. The heat dissipation coating 6 on the outer side of the milling cutter 3 can effectively absorb and conduct the heat generated on the surface of the milling cutter 3, and quickly dissipate the heat to the surrounding environment. By accelerating the heat dissipation rate, the working temperature of the milling cutter 3 is reduced, and the material performance of the milling cutter 3 is prevented from deteriorating or deforming due to high temperature. This ensures the cutting performance and machining accuracy of the milling cutter 3, while also extending the service life of the milling cutter 3, reducing the replacement frequency of the milling cutter 3, and improving the machining efficiency of the CNC roll thread milling machine.
[0029] A frustum-shaped post 8 is installed between the drill rod 2 and the milling cutter 3. The frustum-shaped post 8 is welded to the bottom end of the drill rod 2 and the upper side of the milling cutter 3. When the CNC roll thread milling machine is working, the milling cutter 3 will be subjected to a large cutting force during the cutting process, including axial force and radial force. The frustum-shaped post 8 installed between the drill rod 2 and the milling cutter 3 can evenly distribute the cutting force on the milling cutter 3 to the drill rod 2. The welded connection method ensures that the frustum-shaped post 8 has a high connection strength with the drill rod 2 and the milling cutter 3, so that the three form a solid whole structure. In this way, when bearing the cutting force, the frustum-shaped post 8 can effectively enhance the connection stability between the drill rod 2 and the milling cutter 3, prevent the milling cutter 3 from loosening or shifting during the cutting process, ensure the accuracy and safety of milling, and also reduce the damage to the milling cutter 3 and equipment failure caused by unstable connection.
[0030] The drill rod 2 is provided with a corrosion-resistant layer 10, which is a chrome-plated layer. In the working environment of the CNC roll thread milling machine, the drill rod 2 may come into contact with corrosive media such as cutting fluid, coolant, and moisture in the air. The chrome-plated corrosion-resistant layer 10 on the outside of the drill rod 2 has good chemical stability and corrosion resistance. It can form a dense protective film on the surface of the drill rod 2, preventing corrosive media from directly contacting the base of the drill rod 2. Even during long-term use, the chrome-plated layer can effectively prevent the drill rod 2 from being corroded, ensuring that the structural strength and dimensional accuracy of the drill rod 2 do not change. This ensures the stability and reliability of the drill rod 2 when transmitting power and supporting the milling cutter 3 for machining, extends the service life of the drill rod 2, and reduces equipment maintenance costs.
[0031] The working principle and usage process of this utility model are as follows: When the CNC roll thread milling machine is working, the external high-pressure gas enters through the arc-shaped air inlet 9 at the upper end of the drill rod 2. The arc design allows the gas to be guided more smoothly to the air duct 7. The gas flows downward along the air duct 7 inside the drill rod 2 and finally sprays out from the air outlet 11 at the bottom end of the drill rod 2. The sprayed high-pressure gas can effectively blow away the iron chips generated by the milling cutter 3 during the cutting process, avoiding the accumulation of iron chips that affect the machining accuracy and the life of the milling cutter 3. At the same time, the flow of high-pressure gas can also play a certain role in cooling the milling cutter 3 and the drill rod 2, preventing the milling cutter 3 from being worn more quickly or the workpiece from being deformed due to the high temperature generated by long-term cutting.
[0032] Finally, it should be noted that the above are merely preferred embodiments of this utility model and are not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A milling head structure of a numerical control roll thread milling machine, comprising a milling head (1); characterized in that: The milling head (1) consists of a drill rod (2) and a milling cutter (3). The milling cutter (3) is installed at the bottom of the drill rod (2). An air duct (7) is provided in the middle of the drill rod (2). An arc-shaped air inlet (9) is provided at the upper end of the drill rod (2). The arc-shaped air inlet (9) is connected to the air duct (7). An air outlet (11) is provided at the bottom of the drill rod (2). The air outlet (11) is connected to the air duct (7).
2. The milling head structure of the numerical control roller thread milling machine according to claim 1, characterized in that: The milling cutter (3) has grooves (5) around its perimeter.
3. The milling head structure of the numerical control roller thread milling machine according to claim 1, characterized in that: The milling cutter (3) has a tungsten steel layer (4) around its outer perimeter, and the tungsten steel layer (4) is welded to the outer perimeter of the milling cutter (3).
4. The milling head structure of the numerical control roller thread milling machine according to claim 1, characterized in that: The milling cutter (3) is provided with a heat dissipation coating (6) on its outer side, and the heat dissipation coating (6) is attached to the outer side of the milling cutter (3).
5. The milling head structure of the numerical control roller thread milling machine according to claim 1, characterized in that: A frustum-shaped pile (8) is provided between the drill rod (2) and the milling cutter (3), and the frustum-shaped pile (8) is welded to the bottom end of the drill rod (2) and the upper side of the milling cutter (3).
6. The milling head structure of the numerical control roller thread milling machine according to claim 1, characterized in that: The drill pipe (2) is provided with a corrosion-resistant layer (10) on the outside, and the corrosion-resistant layer (10) is a chromium-plated layer.