A deep cavity milling tool

Abstract

The utility model provides a kind of deep cavity milling processing cutter, it is related to milling technical field.The utility model includes shank, tool head is connected on shank, dynamic balance ring is connected on shank, the shank includes tool bar and end rod, the tool head and dynamic balance ring are located on the tool bar, extension rod is equipped between the tool bar and the end rod, the number of the extension rod is zero, one or more, the tool bar and end rod are coaxially equipped with the connecting rod and the connecting hole that mutually cooperate respectively in the end portion of mutual approach, the extension rod both ends are coaxially equipped with the connecting rod and the connecting hole.The utility model has length adjustable modular shank.

Description

Technical Field

[0001] This utility model relates to the field of milling technology, specifically to a deep cavity milling tool. Background Technology

[0002] As competition in the aviation industry intensifies, higher demands are being placed on aircraft performance. The overall structure of aircraft is gradually replacing the multi-piece riveted structure, leading to the development of deep cavity structures for joint and shaft products. Due to the narrow and deep internal cavity, traditional processing methods can hardly guarantee product quality and profitability.

[0003] In existing technologies, deep cavity milling is mainly achieved by using an extended tool holder to hold the integral tool. This presents the problem of excessive tool cost. When facing narrow cavities, the tool holder interferes, thus requiring the customization of extended tools. However, the applicable range is narrow, and only tool holders of various sizes can be customized. In addition, the customized extended tools may lead to instability in the machining process due to their excessive length-to-diameter ratio. Utility Model Content

[0004] The purpose of this invention is to develop a deep cavity milling tool with a modular tool holder that has an adjustable length.

[0005] This utility model is achieved through the following technical solution:

[0006] A deep cavity milling tool, comprising:

[0007] Handle;

[0008] The blade head is attached to the handle;

[0009] Dynamic balancing ring, connected to the tool holder;

[0010] The tool holder includes a tool bar and an end bar. The tool head and dynamic balance ring are disposed on the tool bar. An extension rod is provided between the tool bar and the end bar. The number of extension rods can be zero or one or more. The ends of the tool bar and the end bar that are close to each other are respectively provided with a coaxial connecting rod and a connecting hole. The two ends of the extension rod are provided with the connecting rod and the connecting hole coaxially.

[0011] Optionally, the connecting hole includes a coaxial positioning hole and a threaded hole, the positioning hole being located on the inner side, the connecting rod including a coaxial positioning rod and a threaded rod, the end of the positioning rod and the end of the positioning hole being tapered and engaging with each other, and the threaded rod engaging with the threaded hole.

[0012] Optionally, the handle is made of tungsten steel.

[0013] Optionally, the surface of the tool holder is provided with a titanium nitride coating.

[0014] Optionally, the tool holder is provided with a vibration suppression component, the material of which is different from that of the tool holder.

[0015] Optionally, the vibration suppression component includes a cylindrical cavity disposed inside the tool holder, the cavity being coaxial with the tool holder, and the cavity being filled with damping material.

[0016] Optionally, the damping material is a polymer vibration-absorbing material or any one or more combinations of granular rubber, granular foam plastic, and nylon sand.

[0017] Optionally, the vibration suppression component includes an annular groove formed on the outer wall of the tool holder away from the tool head. The annular groove is circular and coaxial with the tool holder, extending to the end of the tool holder. A pressure ring is threaded to the end of the annular groove away from the tool head, and a damping ring is sleeved on the annular groove inside the pressure ring.

[0018] Optionally, the outer diameter of the pressure ring and the damping ring is adapted to the outer diameter of the tool holder. The number of damping rings is one or more. The damping rings and the tool holder are made of materials with different natural frequencies, and the multiple damping rings are also made of materials with different natural frequencies.

[0019] Optionally, the dynamic balancing ring is coaxially connected to the tool holder, and a balancing groove is formed on the inner wall of the dynamic balancing ring.

[0020] The beneficial effects of this utility model are:

[0021] This invention allows for adjustment of the overall length of the tool holder by changing the number or length of the extension rods, thereby increasing the applicability of the tool. It eliminates the need for customizing multiple tool holders, avoiding excessive costs for deep cavity milling tools. Compared to the traditional method of removing or adding material to the outer wall of the dynamic balance ring, this invention removes material from the inner wall of the dynamic balance ring, which does not damage the smooth circular outer wall of the dynamic balance ring. This prevents wind resistance during tool rotation, reducing tool vibration. The damping ring utilizes the damping characteristics generated when different materials vibrate to achieve vibration reduction, and the damping material filled inside the tool holder absorbs vibration, further reducing vibration. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a structural diagram of the present utility model;

[0024] Figure 2 This is a structural diagram of a dynamic balancing ring;

[0025] Figure 3 for Figure 1 Cross-sectional view at point A in the middle;

[0026] Figure 4 This is a diagram of the annular groove structure.

[0027] Reference numerals in the attached drawings: 1. Cutter head; 2. Dynamic balancing ring; 21. Balancing groove; 3. Cutter bar; 4. Extension rod; 5. End rod; 6. Vibration damping ring; 7. Pressure ring; 8. Connecting rod; 9. Connecting hole; 10. Ring groove. Detailed Implementation

[0028] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0029] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0030] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0031] like Figures 1-4 As shown, this utility model discloses a deep cavity milling tool, including a tool holder, a tool head 1 and a dynamic balancing ring 2 on the tool holder, and the dynamic balancing ring 2 is bolted to the tool holder.

[0032] The handle is made of tungsten steel and has a titanium nitride coating. The titanium nitride coating has extremely high hardness and high elastic modulus, which can significantly enhance the rigidity and resistance to deformation of the metal surface. This property can reduce surface plastic deformation or fretting wear caused by vibration, thereby reducing the accumulation of vibration energy.

[0033] The dynamic balancing ring 2 is coaxially connected to the tool holder. A balancing groove 21 is provided on the inner wall of the dynamic balancing ring 2. The balancing groove 21 can be an arc-shaped groove. The balancing groove 21 can reduce the weight in this area and cause the center of gravity of the dynamic balancing ring 2 to shift away from the balancing groove 21.

[0034] The tool holder includes a tool bar 3 connected to the dynamic balance ring 2 and the tool head 1. The tool bar 3 has an end bar 5 on the side away from the tool head 1. One or more extension rods 4 are provided between the end bar 5 and the tool bar 3. By replacing different extension rods 4 or changing the number of extension rods 4, the length of the tool holder can be adjusted. The number of extension rods 4 can also be zero, that is, the tool bar 3 can be directly connected to the end bar 5.

[0035] The end of the tool holder 3 away from the tool head 1 is provided with a connecting rod 8 coaxially therewith. The end of the end rod 5 near the end of the tool holder 3 is provided with a connecting hole 9 coaxially therewith. One end of the extension rod 4 is provided with a connecting hole 9 coaxially, and the other end is provided with a connecting rod 8 coaxially. The connecting rod 8 is adapted to the connecting hole 9. The connecting hole 9 includes a coaxial positioning hole and a threaded hole. The positioning hole is located on the inner side. Correspondingly, the connecting rod 8 includes a coaxial positioning rod and a threaded rod. The end of the positioning rod and the end of the positioning hole are tapered and fit together. The threaded rod is threaded into the threaded hole.

[0036] The tool holder 3 is equipped with a vibration suppression component, which can absorb high-frequency vibrations to achieve vibration reduction. The vibration suppression component includes a cylindrical cavity (not shown in the figure) located inside the tool holder 3. The cavity is coaxial with the tool holder 3 and is filled with damping material. The damping material can be any one or a combination of granular rubber, granular foam plastic, and nylon sand. Alternatively, the damping material can also be a polymer vibration-absorbing material.

[0037] An annular groove 10 is formed on the outer wall of the tool holder 3 on the side away from the tool head 1. The annular groove 10 is circular and coaxial with the tool holder 3, extending to the end of the tool holder 3. At least one damping ring 6 is fitted inside the annular groove 10. The inner diameter of the damping ring 6 matches the outer diameter of the annular groove 10, and the outer diameter of the damping ring 6 matches the outer diameter of the tool holder 3 at the location of the annular groove 10. A pressure ring 7 is fitted on the end of the annular groove 10 away from the tool head 1. The outer wall of the annular groove 10 away from the tool head 1 has an external thread, and the inner wall of the pressure ring 7 has an internal thread that mates with the external thread. The outer diameter of the pressure ring 7 matches the outer diameter of the damping ring 6. After the damping ring 6 is fitted into the annular groove 10, the pressure ring 7 is threaded onto the annular groove 10 to fix the damping ring 6. There can be multiple damping rings 6. Since the width of the annular groove 10 inside the pressure ring 7 is fixed, the more damping rings 6 there are, the smaller the width of the damping rings 6 becomes. Figure 1 As shown, in this embodiment, there are two vibration damping rings 6. The vibration damping rings 6 are made of materials with different natural frequencies than the tool holder 3. The multiple vibration damping rings 6 are also made of materials with different natural frequencies. The combination of multiple materials with different natural frequencies will generate a comprehensive resistance curve and effectively prevent resonance through the resistance effect generated.

[0038] This utility model is a modular tool holder. The overall length of the tool holder can be adjusted by changing the number or length of the extension rods 4, thereby increasing the applicability of the tool. It eliminates the need for customizing multiple tool holders and avoids excessive costs for deep cavity milling tools. Compared with the traditional method of removing or adding material to the outer wall of the dynamic balance ring 2, this utility model removes material from the inner wall of the dynamic balance ring 2 without damaging the smooth circular outer wall of the dynamic balance ring 2. This prevents wind resistance during tool rotation and helps reduce tool vibration. The damping ring 6 utilizes the damping characteristics generated when different materials vibrate to achieve vibration reduction. The damping material filled inside the tool holder 3 can absorb vibration, further achieving vibration reduction.

[0039] The above embodiments are merely preferred embodiments of this utility model and are not intended to limit the technical solutions of this utility model. Any technical solution that can be implemented based on the above embodiments without creative effort should be considered to fall within the scope of protection of this utility model patent.

Claims

1. A deep cavity milling tool, characterized in that, include: Handle; The blade head is attached to the handle; Dynamic balancing ring, connected to the tool holder; The tool holder includes a tool bar and an end bar. The tool head and dynamic balance ring are disposed on the tool bar. An extension rod is provided between the tool bar and the end bar. The number of extension rods can be zero or one or more. The ends of the tool bar and the end bar that are close to each other are respectively provided with a coaxial connecting rod and a connecting hole. The two ends of the extension rod are provided with the connecting rod and the connecting hole coaxially.

2. The deep cavity milling tool according to claim 1, characterized in that, The connecting hole includes a coaxial positioning hole and a threaded hole, with the positioning hole located on the inner side. The connecting rod includes a coaxial positioning rod and a threaded rod, with the end of the positioning rod and the end of the positioning hole forming a matching tapered shape. The threaded rod is threadedly engaged with the threaded hole.

3. The deep cavity milling tool according to claim 1, characterized in that, The handle is made of tungsten steel.

4. The deep cavity milling tool according to claim 1, characterized in that, The surface of the handle is coated with titanium nitride.

5. The deep cavity milling tool according to claim 1, characterized in that, The tool holder is equipped with a vibration suppression component, and the material of the vibration suppression component is different from that of the tool holder.

6. The deep cavity milling tool according to claim 5, characterized in that, The vibration suppression component includes a cylindrical cavity disposed inside the tool holder, the cavity being coaxial with the tool holder, and the cavity being filled with damping material.

7. The deep cavity milling tool according to claim 6, characterized in that, The damping material is a polymer vibration-absorbing material or any one or more combinations of granular rubber, granular foam plastic, and nylon sand.

8. The deep cavity milling tool according to claim 5, characterized in that, The vibration suppression component includes an annular groove formed on the outer wall of the tool holder away from the tool head. The annular groove is circular and coaxial with the tool holder, extending to the end of the tool holder. A pressure ring is threaded to the end of the annular groove away from the tool head, and a vibration damping ring is sleeved on the annular groove inside the pressure ring.

9. The deep cavity milling tool according to claim 8, characterized in that, The outer diameter of the pressure ring and the damping ring is adapted to the outer diameter of the tool holder. There are one or more damping rings. The damping rings and the tool holder are made of materials with different natural frequencies. The multiple damping rings are also made of materials with different natural frequencies.

10. The deep cavity milling tool according to any one of claims 1 to 9, characterized in that, The dynamic balancing ring is coaxially connected to the tool holder, and a balancing groove is formed on the inner wall of the dynamic balancing ring.

Images